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File snort-2.9.5_snortsam.patch of Package snort295
diff -uNr snort-2.9.5.orig/autojunk.sh snort-2.9.5/autojunk.sh --- snort-2.9.5.orig/autojunk.sh 1970-01-01 01:00:00.000000000 +0100 +++ snort-2.9.5/autojunk.sh 2013-07-08 22:58:39.886671038 +0200 @@ -0,0 +1,7 @@ +#!/bin/sh +# the list of commands that need to run before we do a compile +libtoolize -f --automake --copy +aclocal --verbose -I m4 -I /usr/share/aclocal +autoheader -f +automake -f --add-missing --copy +autoconf -f diff -uNr snort-2.9.5.orig/etc/snort.conf snort-2.9.5/etc/snort.conf --- snort-2.9.5.orig/etc/snort.conf 2013-06-04 23:23:28.000000000 +0200 +++ snort-2.9.5/etc/snort.conf 2013-07-08 22:58:33.182668593 +0200 @@ -529,11 +529,38 @@ # pcap # output log_tcpdump: tcpdump.log +################################################### +# snortsam +################################################### +# In order to cause Snort to send a blocking request to the SnortSam agent, +# that agent has to be listed, including the port it listens on, +# and the encryption key it is using. The statement for that is: +# +# output alert_fwsam: {SnortSam Station}:{port}/{password} +# +# {SnortSam Station}: IP address or host name of the host where SnortSam is running. +# {port}: The port the remote SnortSam agent listens on. +# {password}: The password, or key, used for encryption of the +# communication to the remote agent. +# +# At the very least, the IP address or host name of the host running SnortSam +# needs to be specified. If the port is omitted, it defaults to TCP port 898. +# If the password is omitted, it defaults to a preset password. +# (In which case it needs to be omitted on the SnortSam agent as well) +# +# More than one host can be specified, but has to be done on the same line. +# Just separate them with one or more spaces. +# +# Examples: +# +# output alert_fwsam: firewall/idspassword +# output alert_fwsam: fw1.domain.tld:898/mykey +# output alert_fwsam: 192.168.0.1/borderfw 192.168.1.254/wanfw + # metadata reference data. do not modify these lines include classification.config include reference.config - ################################################### # Step #7: Customize your rule set # For more information, see Snort Manual, Writing Snort Rules diff -uNr snort-2.9.5.orig/etc/snort.conf.orig snort-2.9.5/etc/snort.conf.orig --- snort-2.9.5.orig/etc/snort.conf.orig 1970-01-01 01:00:00.000000000 +0100 +++ snort-2.9.5/etc/snort.conf.orig 2013-06-04 23:23:28.000000000 +0200 @@ -0,0 +1,688 @@ +#-------------------------------------------------- +# VRT Rule Packages Snort.conf +# +# For more information visit us at: +# http://www.snort.org Snort Website +# http://vrt-blog.snort.org/ Sourcefire VRT Blog +# +# Mailing list Contact: snort-sigs@lists.sourceforge.net +# False Positive reports: fp@sourcefire.com +# Snort bugs: bugs@snort.org +# +# Compatible with Snort Versions: +# VERSIONS : 2.9.5.0 +# +# Snort build options: +# OPTIONS : --enable-gre --enable-mpls --enable-targetbased --enable-ppm --enable-perfprofiling --enable-zlib --enable-active-response --enable-normalizer --enable-reload --enable-react --enable-flexresp3 +# +# Additional information: +# This configuration file enables active response, to run snort in +# test mode -T you are required to supply an interface -i <interface> +# or test mode will fail to fully validate the configuration and +# exit with a FATAL error +#-------------------------------------------------- + +################################################### +# This file contains a sample snort configuration. +# You should take the following steps to create your own custom configuration: +# +# 1) Set the network variables. +# 2) Configure the decoder +# 3) Configure the base detection engine +# 4) Configure dynamic loaded libraries +# 5) Configure preprocessors +# 6) Configure output plugins +# 7) Customize your rule set +# 8) Customize preprocessor and decoder rule set +# 9) Customize shared object rule set +################################################### + +################################################### +# Step #1: Set the network variables. For more information, see README.variables +################################################### + +# Setup the network addresses you are protecting +ipvar HOME_NET any + +# Set up the external network addresses. Leave as "any" in most situations +ipvar EXTERNAL_NET any + +# List of DNS servers on your network +ipvar DNS_SERVERS $HOME_NET + +# List of SMTP servers on your network +ipvar SMTP_SERVERS $HOME_NET + +# List of web servers on your network +ipvar HTTP_SERVERS $HOME_NET + +# List of sql servers on your network +ipvar SQL_SERVERS $HOME_NET + +# List of telnet servers on your network +ipvar TELNET_SERVERS $HOME_NET + +# List of ssh servers on your network +ipvar SSH_SERVERS $HOME_NET + +# List of ftp servers on your network +ipvar FTP_SERVERS $HOME_NET + +# List of sip servers on your network +ipvar SIP_SERVERS $HOME_NET + +# List of ports you run web servers on +portvar HTTP_PORTS [80,81,82,83,84,85,86,87,88,89,311,383,591,593,631,901,1220,1414,1741,1830,2301,2381,2809,3037,3057,3128,3702,4343,4848,5250,6080,6988,7000,7001,7144,7145,7510,7777,7779,8000,8008,8014,8028,8080,8085,8088,8090,8118,8123,8180,8181,8222,8243,8280,8300,8500,8800,8888,8899,9000,9060,9080,9090,9091,9443,9999,11371,34443,34444,41080,50002,55555] + +# List of ports you want to look for SHELLCODE on. +portvar SHELLCODE_PORTS !80 + +# List of ports you might see oracle attacks on +portvar ORACLE_PORTS 1024: + +# List of ports you want to look for SSH connections on: +portvar SSH_PORTS 22 + +# List of ports you run ftp servers on +portvar FTP_PORTS [21,2100,3535] + +# List of ports you run SIP servers on +portvar SIP_PORTS [5060,5061,5600] + +# List of file data ports for file inspection +portvar FILE_DATA_PORTS [$HTTP_PORTS,110,143] + +# List of GTP ports for GTP preprocessor +portvar GTP_PORTS [2123,2152,3386] + +# other variables, these should not be modified +ipvar AIM_SERVERS [64.12.24.0/23,64.12.28.0/23,64.12.161.0/24,64.12.163.0/24,64.12.200.0/24,205.188.3.0/24,205.188.5.0/24,205.188.7.0/24,205.188.9.0/24,205.188.153.0/24,205.188.179.0/24,205.188.248.0/24] + +# Path to your rules files (this can be a relative path) +# Note for Windows users: You are advised to make this an absolute path, +# such as: c:\snort\rules +var RULE_PATH ../rules +var SO_RULE_PATH ../so_rules +var PREPROC_RULE_PATH ../preproc_rules + +# If you are using reputation preprocessor set these +# Currently there is a bug with relative paths, they are relative to where snort is +# not relative to snort.conf like the above variables +# This is completely inconsistent with how other vars work, BUG 89986 +# Set the absolute path appropriately +var WHITE_LIST_PATH ../rules +var BLACK_LIST_PATH ../rules + +################################################### +# Step #2: Configure the decoder. For more information, see README.decode +################################################### + +# Stop generic decode events: +config disable_decode_alerts + +# Stop Alerts on experimental TCP options +config disable_tcpopt_experimental_alerts + +# Stop Alerts on obsolete TCP options +config disable_tcpopt_obsolete_alerts + +# Stop Alerts on T/TCP alerts +config disable_tcpopt_ttcp_alerts + +# Stop Alerts on all other TCPOption type events: +config disable_tcpopt_alerts + +# Stop Alerts on invalid ip options +config disable_ipopt_alerts + +# Alert if value in length field (IP, TCP, UDP) is greater th elength of the packet +# config enable_decode_oversized_alerts + +# Same as above, but drop packet if in Inline mode (requires enable_decode_oversized_alerts) +# config enable_decode_oversized_drops + +# Configure IP / TCP checksum mode +config checksum_mode: all + +# Configure maximum number of flowbit references. For more information, see README.flowbits +# config flowbits_size: 64 + +# Configure ports to ignore +# config ignore_ports: tcp 21 6667:6671 1356 +# config ignore_ports: udp 1:17 53 + +# Configure active response for non inline operation. For more information, see REAMDE.active +# config response: eth0 attempts 2 + +# Configure DAQ related options for inline operation. For more information, see README.daq +# +# config daq: <type> +# config daq_dir: <dir> +# config daq_mode: <mode> +# config daq_var: <var> +# +# <type> ::= pcap | afpacket | dump | nfq | ipq | ipfw +# <mode> ::= read-file | passive | inline +# <var> ::= arbitrary <name>=<value passed to DAQ +# <dir> ::= path as to where to look for DAQ module so's + +# Configure specific UID and GID to run snort as after dropping privs. For more information see snort -h command line options +# +# config set_gid: +# config set_uid: + +# Configure default snaplen. Snort defaults to MTU of in use interface. For more information see README +# +# config snaplen: +# + +# Configure default bpf_file to use for filtering what traffic reaches snort. For more information see snort -h command line options (-F) +# +# config bpf_file: +# + +# Configure default log directory for snort to log to. For more information see snort -h command line options (-l) +# +# config logdir: + + +################################################### +# Step #3: Configure the base detection engine. For more information, see README.decode +################################################### + +# Configure PCRE match limitations +config pcre_match_limit: 3500 +config pcre_match_limit_recursion: 1500 + +# Configure the detection engine See the Snort Manual, Configuring Snort - Includes - Config +config detection: search-method ac-split search-optimize max-pattern-len 20 + +# Configure the event queue. For more information, see README.event_queue +config event_queue: max_queue 8 log 5 order_events content_length + +################################################### +## Configure GTP if it is to be used. +## For more information, see README.GTP +#################################################### + +# config enable_gtp + +################################################### +# Per packet and rule latency enforcement +# For more information see README.ppm +################################################### + +# Per Packet latency configuration +#config ppm: max-pkt-time 250, \ +# fastpath-expensive-packets, \ +# pkt-log + +# Per Rule latency configuration +#config ppm: max-rule-time 200, \ +# threshold 3, \ +# suspend-expensive-rules, \ +# suspend-timeout 20, \ +# rule-log alert + +################################################### +# Configure Perf Profiling for debugging +# For more information see README.PerfProfiling +################################################### + +#config profile_rules: print all, sort avg_ticks +#config profile_preprocs: print all, sort avg_ticks + +################################################### +# Configure protocol aware flushing +# For more information see README.stream5 +################################################### +config paf_max: 16000 + +################################################### +# Step #4: Configure dynamic loaded libraries. +# For more information, see Snort Manual, Configuring Snort - Dynamic Modules +################################################### + +# path to dynamic preprocessor libraries +dynamicpreprocessor directory /usr/local/lib/snort_dynamicpreprocessor/ + +# path to base preprocessor engine +dynamicengine /usr/local/lib/snort_dynamicengine/libsf_engine.so + +# path to dynamic rules libraries +dynamicdetection directory /usr/local/lib/snort_dynamicrules + +################################################### +# Step #5: Configure preprocessors +# For more information, see the Snort Manual, Configuring Snort - Preprocessors +################################################### + +# GTP Control Channle Preprocessor. For more information, see README.GTP +# preprocessor gtp: ports { 2123 3386 2152 } + +# Inline packet normalization. For more information, see README.normalize +# Does nothing in IDS mode +preprocessor normalize_ip4 +preprocessor normalize_tcp: ips ecn stream +preprocessor normalize_icmp4 +preprocessor normalize_ip6 +preprocessor normalize_icmp6 + +# Target-based IP defragmentation. For more inforation, see README.frag3 +preprocessor frag3_global: max_frags 65536 +preprocessor frag3_engine: policy windows detect_anomalies overlap_limit 10 min_fragment_length 100 timeout 180 + +# Target-Based stateful inspection/stream reassembly. For more inforation, see README.stream5 +preprocessor stream5_global: track_tcp yes, \ + track_udp yes, \ + track_icmp no, \ + max_tcp 262144, \ + max_udp 131072, \ + max_active_responses 2, \ + min_response_seconds 5 +preprocessor stream5_tcp: policy windows, detect_anomalies, require_3whs 180, \ + overlap_limit 10, small_segments 3 bytes 150, timeout 180, \ + ports client 21 22 23 25 42 53 70 79 109 110 111 113 119 135 136 137 139 143 \ + 161 445 513 514 587 593 691 1433 1521 1741 2100 3306 6070 6665 6666 6667 6668 6669 \ + 7000 8181 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779, \ + ports both 80 81 82 83 84 85 86 87 88 89 110 311 383 443 465 563 591 593 631 636 901 989 992 993 994 995 1220 1414 1830 2301 2381 2809 3037 3057 3128 3702 4343 4848 5250 6080 6988 7907 7000 7001 7144 7145 7510 7802 7777 7779 \ + 7801 7900 7901 7902 7903 7904 7905 7906 7908 7909 7910 7911 7912 7913 7914 7915 7916 \ + 7917 7918 7919 7920 8000 8008 8014 8028 8080 8085 8088 8090 8118 8123 8180 8222 8243 8280 8300 8500 8800 8888 8899 9000 9060 9080 9090 9091 9443 9999 11371 34443 34444 41080 50002 55555 +preprocessor stream5_udp: timeout 180 + +# performance statistics. For more information, see the Snort Manual, Configuring Snort - Preprocessors - Performance Monitor +# preprocessor perfmonitor: time 300 file /var/snort/snort.stats pktcnt 10000 + +# HTTP normalization and anomaly detection. For more information, see README.http_inspect +preprocessor http_inspect: global iis_unicode_map unicode.map 1252 compress_depth 65535 decompress_depth 65535 +preprocessor http_inspect_server: server default \ + http_methods { GET POST PUT SEARCH MKCOL COPY MOVE LOCK UNLOCK NOTIFY POLL BCOPY BDELETE BMOVE LINK UNLINK OPTIONS HEAD DELETE TRACE TRACK CONNECT SOURCE SUBSCRIBE UNSUBSCRIBE PROPFIND PROPPATCH BPROPFIND BPROPPATCH RPC_CONNECT PROXY_SUCCESS BITS_POST CCM_POST SMS_POST RPC_IN_DATA RPC_OUT_DATA RPC_ECHO_DATA } \ + chunk_length 500000 \ + server_flow_depth 0 \ + client_flow_depth 0 \ + post_depth 65495 \ + oversize_dir_length 500 \ + max_header_length 750 \ + max_headers 100 \ + max_spaces 200 \ + small_chunk_length { 10 5 } \ + ports { 80 81 82 83 84 85 86 87 88 89 311 383 591 593 631 901 1220 1414 1741 1830 2301 2381 2809 3037 3057 3128 3702 4343 4848 5250 6080 6988 7000 7001 7144 7145 7510 7777 7779 8000 8008 8014 8028 8080 8085 8088 8090 8118 8123 8180 8181 8222 8243 8280 8300 8500 8800 8888 8899 9000 9060 9080 9090 9091 9443 9999 11371 34443 34444 41080 50002 55555 } \ + non_rfc_char { 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 } \ + enable_cookie \ + extended_response_inspection \ + inspect_gzip \ + normalize_utf \ + unlimited_decompress \ + normalize_javascript \ + apache_whitespace no \ + ascii no \ + bare_byte no \ + directory no \ + double_decode no \ + iis_backslash no \ + iis_delimiter no \ + iis_unicode no \ + multi_slash no \ + utf_8 no \ + u_encode yes \ + webroot no + +# ONC-RPC normalization and anomaly detection. For more information, see the Snort Manual, Configuring Snort - Preprocessors - RPC Decode +preprocessor rpc_decode: 111 32770 32771 32772 32773 32774 32775 32776 32777 32778 32779 no_alert_multiple_requests no_alert_large_fragments no_alert_incomplete + +# Back Orifice detection. +preprocessor bo + +# FTP / Telnet normalization and anomaly detection. For more information, see README.ftptelnet +preprocessor ftp_telnet: global inspection_type stateful encrypted_traffic no check_encrypted +preprocessor ftp_telnet_protocol: telnet \ + ayt_attack_thresh 20 \ + normalize ports { 23 } \ + detect_anomalies +preprocessor ftp_telnet_protocol: ftp server default \ + def_max_param_len 100 \ + ports { 21 2100 3535 } \ + telnet_cmds yes \ + ignore_telnet_erase_cmds yes \ + ftp_cmds { ABOR ACCT ADAT ALLO APPE AUTH CCC CDUP } \ + ftp_cmds { CEL CLNT CMD CONF CWD DELE ENC EPRT } \ + ftp_cmds { EPSV ESTA ESTP FEAT HELP LANG LIST LPRT } \ + ftp_cmds { LPSV MACB MAIL MDTM MIC MKD MLSD MLST } \ + ftp_cmds { MODE NLST NOOP OPTS PASS PASV PBSZ PORT } \ + ftp_cmds { PROT PWD QUIT REIN REST RETR RMD RNFR } \ + ftp_cmds { RNTO SDUP SITE SIZE SMNT STAT STOR STOU } \ + ftp_cmds { STRU SYST TEST TYPE USER XCUP XCRC XCWD } \ + ftp_cmds { XMAS XMD5 XMKD XPWD XRCP XRMD XRSQ XSEM } \ + ftp_cmds { XSEN XSHA1 XSHA256 } \ + alt_max_param_len 0 { ABOR CCC CDUP ESTA FEAT LPSV NOOP PASV PWD QUIT REIN STOU SYST XCUP XPWD } \ + alt_max_param_len 200 { ALLO APPE CMD HELP NLST RETR RNFR STOR STOU XMKD } \ + alt_max_param_len 256 { CWD RNTO } \ + alt_max_param_len 400 { PORT } \ + alt_max_param_len 512 { SIZE } \ + chk_str_fmt { ACCT ADAT ALLO APPE AUTH CEL CLNT CMD } \ + chk_str_fmt { CONF CWD DELE ENC EPRT EPSV ESTP HELP } \ + chk_str_fmt { LANG LIST LPRT MACB MAIL MDTM MIC MKD } \ + chk_str_fmt { MLSD MLST MODE NLST OPTS PASS PBSZ PORT } \ + chk_str_fmt { PROT REST RETR RMD RNFR RNTO SDUP SITE } \ + chk_str_fmt { SIZE SMNT STAT STOR STRU TEST TYPE USER } \ + chk_str_fmt { XCRC XCWD XMAS XMD5 XMKD XRCP XRMD XRSQ } \ + chk_str_fmt { XSEM XSEN XSHA1 XSHA256 } \ + cmd_validity ALLO < int [ char R int ] > \ + cmd_validity EPSV < [ { char 12 | char A char L char L } ] > \ + cmd_validity MACB < string > \ + cmd_validity MDTM < [ date nnnnnnnnnnnnnn[.n[n[n]]] ] string > \ + cmd_validity MODE < char ASBCZ > \ + cmd_validity PORT < host_port > \ + cmd_validity PROT < char CSEP > \ + cmd_validity STRU < char FRPO [ string ] > \ + cmd_validity TYPE < { char AE [ char NTC ] | char I | char L [ number ] } > +preprocessor ftp_telnet_protocol: ftp client default \ + max_resp_len 256 \ + bounce yes \ + ignore_telnet_erase_cmds yes \ + telnet_cmds yes + + +# SMTP normalization and anomaly detection. For more information, see README.SMTP +preprocessor smtp: ports { 25 465 587 691 } \ + inspection_type stateful \ + b64_decode_depth 0 \ + qp_decode_depth 0 \ + bitenc_decode_depth 0 \ + uu_decode_depth 0 \ + log_mailfrom \ + log_rcptto \ + log_filename \ + log_email_hdrs \ + normalize cmds \ + normalize_cmds { ATRN AUTH BDAT CHUNKING DATA DEBUG EHLO EMAL ESAM ESND ESOM ETRN EVFY } \ + normalize_cmds { EXPN HELO HELP IDENT MAIL NOOP ONEX QUEU QUIT RCPT RSET SAML SEND SOML } \ + normalize_cmds { STARTTLS TICK TIME TURN TURNME VERB VRFY X-ADAT X-DRCP X-ERCP X-EXCH50 } \ + normalize_cmds { X-EXPS X-LINK2STATE XADR XAUTH XCIR XEXCH50 XGEN XLICENSE XQUE XSTA XTRN XUSR } \ + max_command_line_len 512 \ + max_header_line_len 1000 \ + max_response_line_len 512 \ + alt_max_command_line_len 260 { MAIL } \ + alt_max_command_line_len 300 { RCPT } \ + alt_max_command_line_len 500 { HELP HELO ETRN EHLO } \ + alt_max_command_line_len 255 { EXPN VRFY ATRN SIZE BDAT DEBUG EMAL ESAM ESND ESOM EVFY IDENT NOOP RSET } \ + alt_max_command_line_len 246 { SEND SAML SOML AUTH TURN ETRN DATA RSET QUIT ONEX QUEU STARTTLS TICK TIME TURNME VERB X-EXPS X-LINK2STATE XADR XAUTH XCIR XEXCH50 XGEN XLICENSE XQUE XSTA XTRN XUSR } \ + valid_cmds { ATRN AUTH BDAT CHUNKING DATA DEBUG EHLO EMAL ESAM ESND ESOM ETRN EVFY } \ + valid_cmds { EXPN HELO HELP IDENT MAIL NOOP ONEX QUEU QUIT RCPT RSET SAML SEND SOML } \ + valid_cmds { STARTTLS TICK TIME TURN TURNME VERB VRFY X-ADAT X-DRCP X-ERCP X-EXCH50 } \ + valid_cmds { X-EXPS X-LINK2STATE XADR XAUTH XCIR XEXCH50 XGEN XLICENSE XQUE XSTA XTRN XUSR } \ + xlink2state { enabled } + +# Portscan detection. For more information, see README.sfportscan +# preprocessor sfportscan: proto { all } memcap { 10000000 } sense_level { low } + +# ARP spoof detection. For more information, see the Snort Manual - Configuring Snort - Preprocessors - ARP Spoof Preprocessor +# preprocessor arpspoof +# preprocessor arpspoof_detect_host: 192.168.40.1 f0:0f:00:f0:0f:00 + +# SSH anomaly detection. For more information, see README.ssh +preprocessor ssh: server_ports { 22 } \ + autodetect \ + max_client_bytes 19600 \ + max_encrypted_packets 20 \ + max_server_version_len 100 \ + enable_respoverflow enable_ssh1crc32 \ + enable_srvoverflow enable_protomismatch + +# SMB / DCE-RPC normalization and anomaly detection. For more information, see README.dcerpc2 +preprocessor dcerpc2: memcap 102400, events [co ] +preprocessor dcerpc2_server: default, policy WinXP, \ + detect [smb [139,445], tcp 135, udp 135, rpc-over-http-server 593], \ + autodetect [tcp 1025:, udp 1025:, rpc-over-http-server 1025:], \ + smb_max_chain 3, smb_invalid_shares ["C$", "D$", "ADMIN$"] + +# DNS anomaly detection. For more information, see README.dns +preprocessor dns: ports { 53 } enable_rdata_overflow + +# SSL anomaly detection and traffic bypass. For more information, see README.ssl +preprocessor ssl: ports { 443 465 563 636 989 992 993 994 995 7801 7802 7900 7901 7902 7903 7904 7905 7906 7907 7908 7909 7910 7911 7912 7913 7914 7915 7916 7917 7918 7919 7920 }, trustservers, noinspect_encrypted + +# SDF sensitive data preprocessor. For more information see README.sensitive_data +preprocessor sensitive_data: alert_threshold 25 + +# SIP Session Initiation Protocol preprocessor. For more information see README.sip +preprocessor sip: max_sessions 40000, \ + ports { 5060 5061 5600 }, \ + methods { invite \ + cancel \ + ack \ + bye \ + register \ + options \ + refer \ + subscribe \ + update \ + join \ + info \ + message \ + notify \ + benotify \ + do \ + qauth \ + sprack \ + publish \ + service \ + unsubscribe \ + prack }, \ + max_uri_len 512, \ + max_call_id_len 80, \ + max_requestName_len 20, \ + max_from_len 256, \ + max_to_len 256, \ + max_via_len 1024, \ + max_contact_len 512, \ + max_content_len 2048 + +# IMAP preprocessor. For more information see README.imap +preprocessor imap: \ + ports { 143 } \ + b64_decode_depth 0 \ + qp_decode_depth 0 \ + bitenc_decode_depth 0 \ + uu_decode_depth 0 + +# POP preprocessor. For more information see README.pop +preprocessor pop: \ + ports { 110 } \ + b64_decode_depth 0 \ + qp_decode_depth 0 \ + bitenc_decode_depth 0 \ + uu_decode_depth 0 + +# Modbus preprocessor. For more information see README.modbus +preprocessor modbus: ports { 502 } + +# DNP3 preprocessor. For more information see README.dnp3 +preprocessor dnp3: ports { 20000 } \ + memcap 262144 \ + check_crc + +# Reputation preprocessor. For more information see README.reputation +preprocessor reputation: \ + memcap 500, \ + priority whitelist, \ + nested_ip inner, \ + whitelist $WHITE_LIST_PATH/white_list.rules, \ + blacklist $BLACK_LIST_PATH/black_list.rules + +################################################### +# Step #6: Configure output plugins +# For more information, see Snort Manual, Configuring Snort - Output Modules +################################################### + +# unified2 +# Recommended for most installs +# output unified2: filename merged.log, limit 128, nostamp, mpls_event_types, vlan_event_types + +# Additional configuration for specific types of installs +# output alert_unified2: filename snort.alert, limit 128, nostamp +# output log_unified2: filename snort.log, limit 128, nostamp + +# syslog +# output alert_syslog: LOG_AUTH LOG_ALERT + +# pcap +# output log_tcpdump: tcpdump.log + +# metadata reference data. do not modify these lines +include classification.config +include reference.config + + +################################################### +# Step #7: Customize your rule set +# For more information, see Snort Manual, Writing Snort Rules +# +# NOTE: All categories are enabled in this conf file +################################################### + +# site specific rules +include $RULE_PATH/local.rules + +include $RULE_PATH/app-detect.rules +include $RULE_PATH/attack-responses.rules +include $RULE_PATH/backdoor.rules +include $RULE_PATH/bad-traffic.rules +include $RULE_PATH/blacklist.rules +include $RULE_PATH/botnet-cnc.rules +include $RULE_PATH/browser-chrome.rules +include $RULE_PATH/browser-firefox.rules +include $RULE_PATH/browser-ie.rules +include $RULE_PATH/browser-other.rules +include $RULE_PATH/browser-plugins.rules +include $RULE_PATH/browser-webkit.rules +include $RULE_PATH/chat.rules +include $RULE_PATH/content-replace.rules +include $RULE_PATH/ddos.rules +include $RULE_PATH/dns.rules +include $RULE_PATH/dos.rules +include $RULE_PATH/experimental.rules +include $RULE_PATH/exploit-kit.rules +include $RULE_PATH/exploit.rules +include $RULE_PATH/file-executable.rules +include $RULE_PATH/file-flash.rules +include $RULE_PATH/file-identify.rules +include $RULE_PATH/file-image.rules +include $RULE_PATH/file-multimedia.rules +include $RULE_PATH/file-office.rules +include $RULE_PATH/file-other.rules +include $RULE_PATH/file-pdf.rules +include $RULE_PATH/finger.rules +include $RULE_PATH/ftp.rules +include $RULE_PATH/icmp-info.rules +include $RULE_PATH/icmp.rules +include $RULE_PATH/imap.rules +include $RULE_PATH/indicator-compromise.rules +include $RULE_PATH/indicator-obfuscation.rules +include $RULE_PATH/indicator-shellcode.rules +include $RULE_PATH/info.rules +include $RULE_PATH/malware-backdoor.rules +include $RULE_PATH/malware-cnc.rules +include $RULE_PATH/malware-other.rules +include $RULE_PATH/malware-tools.rules +include $RULE_PATH/misc.rules +include $RULE_PATH/multimedia.rules +include $RULE_PATH/mysql.rules +include $RULE_PATH/netbios.rules +include $RULE_PATH/nntp.rules +include $RULE_PATH/oracle.rules +include $RULE_PATH/os-linux.rules +include $RULE_PATH/os-other.rules +include $RULE_PATH/os-solaris.rules +include $RULE_PATH/os-windows.rules +include $RULE_PATH/other-ids.rules +include $RULE_PATH/p2p.rules +include $RULE_PATH/phishing-spam.rules +include $RULE_PATH/policy-multimedia.rules +include $RULE_PATH/policy-other.rules +include $RULE_PATH/policy.rules +include $RULE_PATH/policy-social.rules +include $RULE_PATH/policy-spam.rules +include $RULE_PATH/pop2.rules +include $RULE_PATH/pop3.rules +include $RULE_PATH/protocol-finger.rules +include $RULE_PATH/protocol-ftp.rules +include $RULE_PATH/protocol-icmp.rules +include $RULE_PATH/protocol-imap.rules +include $RULE_PATH/protocol-pop.rules +include $RULE_PATH/protocol-services.rules +include $RULE_PATH/protocol-voip.rules +include $RULE_PATH/pua-adware.rules +include $RULE_PATH/pua-other.rules +include $RULE_PATH/pua-p2p.rules +include $RULE_PATH/pua-toolbars.rules +include $RULE_PATH/rpc.rules +include $RULE_PATH/rservices.rules +include $RULE_PATH/scada.rules +include $RULE_PATH/scan.rules +include $RULE_PATH/server-apache.rules +include $RULE_PATH/server-iis.rules +include $RULE_PATH/server-mail.rules +include $RULE_PATH/server-mssql.rules +include $RULE_PATH/server-mysql.rules +include $RULE_PATH/server-oracle.rules +include $RULE_PATH/server-other.rules +include $RULE_PATH/server-webapp.rules +include $RULE_PATH/shellcode.rules +include $RULE_PATH/smtp.rules +include $RULE_PATH/snmp.rules +include $RULE_PATH/specific-threats.rules +include $RULE_PATH/spyware-put.rules +include $RULE_PATH/sql.rules +include $RULE_PATH/telnet.rules +include $RULE_PATH/tftp.rules +include $RULE_PATH/virus.rules +include $RULE_PATH/voip.rules +include $RULE_PATH/web-activex.rules +include $RULE_PATH/web-attacks.rules +include $RULE_PATH/web-cgi.rules +include $RULE_PATH/web-client.rules +include $RULE_PATH/web-coldfusion.rules +include $RULE_PATH/web-frontpage.rules +include $RULE_PATH/web-iis.rules +include $RULE_PATH/web-misc.rules +include $RULE_PATH/web-php.rules +include $RULE_PATH/x11.rules + +################################################### +# Step #8: Customize your preprocessor and decoder alerts +# For more information, see README.decoder_preproc_rules +################################################### + +# decoder and preprocessor event rules +# include $PREPROC_RULE_PATH/preprocessor.rules +# include $PREPROC_RULE_PATH/decoder.rules +# include $PREPROC_RULE_PATH/sensitive-data.rules + +################################################### +# Step #9: Customize your Shared Object Snort Rules +# For more information, see http://vrt-blog.snort.org/2009/01/using-vrt-certified-shared-object-rules.html +################################################### + +# dynamic library rules +# include $SO_RULE_PATH/bad-traffic.rules +# include $SO_RULE_PATH/chat.rules +# include $SO_RULE_PATH/dos.rules +# include $SO_RULE_PATH/exploit.rules +# include $SO_RULE_PATH/icmp.rules +# include $SO_RULE_PATH/imap.rules +# include $SO_RULE_PATH/misc.rules +# include $SO_RULE_PATH/multimedia.rules +# include $SO_RULE_PATH/netbios.rules +# include $SO_RULE_PATH/nntp.rules +# include $SO_RULE_PATH/p2p.rules +# include $SO_RULE_PATH/smtp.rules +# include $SO_RULE_PATH/snmp.rules +# include $SO_RULE_PATH/specific-threats.rules +# include $SO_RULE_PATH/web-activex.rules +# include $SO_RULE_PATH/web-client.rules +# include $SO_RULE_PATH/web-iis.rules +# include $SO_RULE_PATH/web-misc.rules + +# Event thresholding or suppression commands. See threshold.conf +include threshold.conf diff -uNr snort-2.9.5.orig/src/fatal.h snort-2.9.5/src/fatal.h --- snort-2.9.5.orig/src/fatal.h 1970-01-01 01:00:00.000000000 +0100 +++ snort-2.9.5/src/fatal.h 2013-07-08 22:58:33.182668593 +0200 @@ -0,0 +1,40 @@ +/* $Id$ */ +/* +** Copyright (C) 2002-2008 Sourcefire, Inc. +** Copyright (C) 1998-2002 Martin Roesch <roesch@sourcefire.com> +** +** This program is free software; you can redistribute it and/or modify +** it under the terms of the GNU General Public License Version 2 as +** published by the Free Software Foundation. You may not use, modify or +** distribute this program under any other version of the GNU General +** Public License. +** +** This program is distributed in the hope that it will be useful, +** but WITHOUT ANY WARRANTY; without even the implied warranty of +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +** GNU General Public License for more details. +** +** You should have received a copy of the GNU General Public License +** along with this program; if not, write to the Free Software +** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +*/ + +#ifndef __FATAL_H__ +#define __FATAL_H__ + + +/* + * in debugging mode print out the filename and the line number where the + * failure have occured + */ + + +#ifdef DEBUG + #define FATAL(msg) { printf("%s:%d: ", __FILE__, __LINE__); FatalError( (char *) msg); } +#else + #define FATAL(msg) FatalError( (char *) msg) +#endif + + + +#endif /* __FATAL_H__ */ diff -uNr snort-2.9.5.orig/src/Makefile.am snort-2.9.5/src/Makefile.am --- snort-2.9.5.orig/src/Makefile.am 2013-06-04 23:19:52.000000000 +0200 +++ snort-2.9.5/src/Makefile.am 2013-07-08 22:58:33.186668664 +0200 @@ -59,6 +59,7 @@ rate_filter.c rate_filter.h \ obfuscation.c obfuscation.h \ rule_option_types.h \ +twofish.c twofish.h \ sfdaq.c sfdaq.h \ idle_processing.c idle_processing.h idle_processing_funcs.h diff -uNr snort-2.9.5.orig/src/Makefile.am.orig snort-2.9.5/src/Makefile.am.orig --- snort-2.9.5.orig/src/Makefile.am.orig 1970-01-01 01:00:00.000000000 +0100 +++ snort-2.9.5/src/Makefile.am.orig 2013-06-04 23:19:52.000000000 +0200 @@ -0,0 +1,93 @@ +## $Id$ +AUTOMAKE_OPTIONS=foreign no-dependencies + +bin_PROGRAMS = snort + +if BUILD_SNPRINTF +SNPRINTF_SOURCES = snprintf.c snprintf.h +endif + +snort_SOURCES = cdefs.h \ +event.h \ +generators.h \ +sf_protocols.h \ +plugin_enum.h \ +rules.h \ +treenodes.h \ +checksum.h \ +debug.c snort_debug.h \ +decode.c decode.h \ +encode.c encode.h \ +active.c active.h \ +log.c log.h \ +mstring.c mstring.h \ +parser.c parser.h \ +profiler.c profiler.h \ +plugbase.c plugbase.h \ +preprocids.h \ +snort.c snort.h \ +build.h \ +$(SNPRINTF_SOURCES) \ +strlcatu.c strlcatu.h \ +strlcpyu.c strlcpyu.h \ +tag.c tag.h \ +util.c util.h \ +detect.c detect.h \ +signature.c signature.h \ +mempool.c mempool.h \ +sf_sdlist.c sf_sdlist.h sf_sdlist_types.h \ +fpcreate.c fpcreate.h \ +fpdetect.c fpdetect.h \ +pcrm.c pcrm.h \ +snort_bounds.h \ +byte_extract.c \ +byte_extract.h \ +timersub.h \ +spo_plugbase.h \ +sfthreshold.c sfthreshold.h \ +packet_time.c packet_time.h \ +event_wrapper.c event_wrapper.h \ +event_queue.c event_queue.h \ +ipv6_port.h \ +ppm.c ppm.h \ +pcap_pkthdr32.h \ +cpuclock.h \ +sf_types.h \ +log_text.c log_text.h \ +detection_filter.c detection_filter.h \ +detection_util.c detection_util.h \ +rate_filter.c rate_filter.h \ +obfuscation.c obfuscation.h \ +rule_option_types.h \ +sfdaq.c sfdaq.h \ +idle_processing.c idle_processing.h idle_processing_funcs.h + +snort_LDADD = output-plugins/libspo.a \ +detection-plugins/libspd.a \ +dynamic-plugins/libdynamic.a \ +dynamic-output/plugins/liboutput.a \ +preprocessors/libspp.a \ +parser/libparser.a \ +target-based/libtarget_based.a \ +preprocessors/HttpInspect/libhttp_inspect.a \ +preprocessors/Stream5/libstream5.a \ +sfutil/libsfutil.a \ +control/libsfcontrol.a \ +file-process/libfileAPI.a \ +file-process/libs/libfile.a + +if BUILD_DYNAMIC_EXAMPLES +EXAMPLES_DIR = dynamic-examples +endif + + +SUBDIRS = sfutil win32 output-plugins detection-plugins dynamic-plugins preprocessors parser dynamic-preprocessors dynamic-output target-based control file-process $(EXAMPLES_DIR) + +INCLUDES = @INCLUDES@ + +if BUILD_SIDE_CHANNEL +snort_LDADD += \ +side-channel/libsidechannel.a \ +side-channel/plugins/libsscm.a +SUBDIRS += side-channel +endif diff -uNr snort-2.9.5.orig/src/output-plugins/Makefile.am snort-2.9.5/src/output-plugins/Makefile.am --- snort-2.9.5.orig/src/output-plugins/Makefile.am 2013-06-04 23:19:53.000000000 +0200 +++ snort-2.9.5/src/output-plugins/Makefile.am 2013-07-08 22:58:33.186668664 +0200 @@ -10,6 +10,7 @@ spo_csv.c spo_csv.h \ spo_log_null.c spo_log_null.h \ spo_log_tcpdump.c spo_log_tcpdump.h \ +spo_alert_fwsam.c spo_alert_fwsam.h \ spo_unified2.c spo_unified2.h \ spo_log_ascii.c spo_log_ascii.h \ spo_alert_sf_socket.h spo_alert_sf_socket.c \ diff -uNr snort-2.9.5.orig/src/output-plugins/Makefile.am.orig snort-2.9.5/src/output-plugins/Makefile.am.orig --- snort-2.9.5.orig/src/output-plugins/Makefile.am.orig 1970-01-01 01:00:00.000000000 +0100 +++ snort-2.9.5/src/output-plugins/Makefile.am.orig 2013-06-04 23:19:53.000000000 +0200 @@ -0,0 +1,18 @@ +## $Id +AUTOMAKE_OPTIONS=foreign no-dependencies + +noinst_LIBRARIES = libspo.a + +libspo_a_SOURCES = spo_alert_fast.c spo_alert_fast.h \ +spo_alert_full.c spo_alert_full.h \ +spo_alert_syslog.c spo_alert_syslog.h \ +spo_alert_unixsock.c spo_alert_unixsock.h \ +spo_csv.c spo_csv.h \ +spo_log_null.c spo_log_null.h \ +spo_log_tcpdump.c spo_log_tcpdump.h \ +spo_unified2.c spo_unified2.h \ +spo_log_ascii.c spo_log_ascii.h \ +spo_alert_sf_socket.h spo_alert_sf_socket.c \ +spo_alert_test.c spo_alert_test.h + +INCLUDES = @INCLUDES@ diff -uNr snort-2.9.5.orig/src/output-plugins/spo_alert_fwsam.c snort-2.9.5/src/output-plugins/spo_alert_fwsam.c --- snort-2.9.5.orig/src/output-plugins/spo_alert_fwsam.c 1970-01-01 01:00:00.000000000 +0100 +++ snort-2.9.5/src/output-plugins/spo_alert_fwsam.c 2013-07-08 22:58:55.050670868 +0200 @@ -0,0 +1,1374 @@ +/* $id: snortpatchb,v 1.2 2002/10/26 03:32:35 fknobbe Exp $ +** +** spo_alert_fwsam.c +** +** Copyright (c) 2001-2004 Frank Knobbe <frank@knobbe.us> +** +** This program is free software; you can redistribute it and/or modify +** it under the terms of the GNU General Public License as published by +** the Free Software Foundation; either version 2 of the License, or +** (at your option) any later version. +** +** This program is distributed in the hope that it will be useful, +** but WITHOUT ANY WARRANTY; without even the implied warranty of +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +** GNU General Public License for more details. +** +** You should have received a copy of the GNU General Public License +** along with this program; if not, write to the Free Software +** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +*/ + +/* + * Purpose: + * + * This module sends alerts to a remote service on a host running SnortSam + * (the agent) which will block the intruding IP address on a variety of + * host and network firewalls. + * + * SnortSam also performs checks against a white-list of never-to-be-blocked IP addresses, + * can override block durations (for example for known proxies), and can detect attack conditions + * where too many blocks are received within a defined interval. If an attack is detected + * it will unblock the last x blocks and wait for the attack to end. + * + * See the SnortSam documentation for more information. + * + * + * Output Plugin Parameters: + *************************** + * + * output alert_fwsam: <SnortSam Station>:<port>/<key> + * + * <FW Mgmt Station>: The IP address or host name of the host running SnortSam. + * <port>: The port the remote SnortSam service listens on (default 898). + * <key>: The key used for authentication (encryption really) + * of the communication to the remote service. + * + * Examples: + * + * output alert_fwsam: snortsambox/idspassword + * output alert_fwsam: fw1.domain.tld:898/mykey + * output alert_fwsam: 192.168.0.1/borderfw 192.168.1.254/wanfw + * + * + * Rule Options: + *************** + * + * fwsam: who[how],time; + * + * who: src, source, dst, dest, destination + * IP address to be blocked according to snort rule (some rules + * are reversed, i.e. homenet -> any [and you want to block any]). + * src denotes IP to the left of -> and dst denotes IP to the right + * + * how: Optional. In, out, src, dest, either, both, this, conn, connection + * Tells FW-1 to block packets INcoming from host, OUTgoing to host, + * EITHERway, or only THIS connection (IP/Service pair). + * See 'fw sam' for more information. May be ignored by other plugins. + * + * time: Duration of block in seconds. (Accepts 'days', 'months', 'weeks', + * 'years', 'minutes', 'seconds', 'hours'. Alternatively, a value of + * 0, or the keyword PERManent, INFinite, or ALWAYS, will block the + * host permanently. Be careful with this! + * Tells FW-1 (and others) how long to inhibit packets from the host. + * + * Examples: + * + * fwsam: src[either],15min; + * or dst[in], 2 days 4 hours + * or src, 1 hour + * + * (default: src[either],5min) + * + * + * Effect: + * + * Alerts are sent to the remote SnortSam services on Firewall-1 Management Stations + * or other hosts running SnortSam (as required for Cisco Routers and PIX). + * The remote services will invoke the SAM configuration via the fw sam + * command line, or by sending a packet to the SAM port 18183, or by using the official + * OPSEC API calls, or by telnetting into Cisco routers or PIX firewalls. + * The communication over the network is encrypted using two-fish. + * (Implementation ripped from CryptCat by Farm9 with permission.) + * + * Future Plans: + * + * - Custom alert trigger per rule (x alerts in y secs) --> Seems to exist in Snort 1.9 now. + * - Enable/Allow tagged fwsam: arguments to provide different values to + * different stations. --> Seems to be accomplished with custom rule-types + * + * + * Comments: + * + * It seem that above wishes can be implemented with todays setup. Feedback concerning + * these is greatly appreciated. + * +*/ + + +#include "spo_alert_fwsam.h" +#include "twofish.h" +/* external globals from rules.c */ +extern char *file_name; +extern int file_line; +extern OptTreeNode *otn_tmp; +extern char *snort_conf_dir; /* extern PV pv; */ + + +/* my globals */ + +FWsamList *FWsamStationList=NULL; /* Global (for all alert-types) list of snortsam stations */ +FWsamOptions *FWsamOptionField=NULL; +unsigned long FWsamMaxOptions=0; + + +/* + * Function: AlertFWsamSetup() + * + * Purpose: Registers the output plugin keyword and initialization + * function into the output plugin list. This is the function that + * gets called from InitOutputPlugins() in plugbase.c. + * It also registers itself as a plugin in order to parse every rule + * and to set the appropiate flags from fwsam: option. + * + * Arguments: None. + * + * Returns: void function + * +*/ +void AlertFWsamSetup(void) +{ + /* link the preprocessor keyword to the init function in the preproc list */ + RegisterOutputPlugin("alert_fwsam", OUTPUT_TYPE_FLAG__ALERT, AlertFWsamInit); + RegisterRuleOption("fwsam", AlertFWsamOptionInit, NULL, OPT_TYPE_ACTION, NULL); + +#ifdef FWSAMDEBUG /* This allows debugging of fwsam only */ + LogMessage("DEBUG => [Alert_FWsam](AlertFWsamSetup) Output plugin is plugged in...\n"); +#endif +} + + +/* This function checks if a given snortsam station is already in + * a given list. +*/ +int FWsamStationExists(FWsamStation *who,FWsamList *list) +{ + while(list) + { + if(list->station) { +// if( who->stationip.s_addr==list->station->stationip.s_addr && + if(IP_EQUALITY(&who->stationip, &list->station->stationip) && + who->stationport==list->station->stationport) + return TRUE; + } + list=list->next; + } + return FALSE; +} + +/* + * Function: AlertFWsamInit(char *args) + * + * Purpose: Calls the argument parsing function, performs final setup on data + * structs, links the preproc function into the function list. + * + * Arguments: args => ptr to argument string + * + * Returns: void function + * +*/ +void AlertFWsamInit(struct _SnortConfig *sc, char *args) +{ char *ap; + unsigned long statip,cnt,again,i; + char *stathost,*statport,*statpass; + FWsamStation *station; + FWsamList *fwsamlist=NULL; /* alert-type dependent list of snortsam stations */ + FWsamList *listp,*newlistp; + struct hostent *hoste; + char buf[1024]=""; + FILE *fp; + FWsamOptions tempopt; + +#ifdef FWSAMDEBUG + unsigned long hostcnt=0; + + + + LogMessage("DEBUG => [Alert_FWsam](AlertFWsamInit) Output plugin initializing...\n"); +#endif + + /* pv.alert_plugin_active = 1; */ + + /* parse the argument list from the rules file */ + + if(args == NULL) + FatalError("ERROR %s (%d) => [Alert_FWsam](AlertFWsamInit) No arguments to alert_fwsam preprocessor!\n", file_name, file_line); + + if(!FWsamOptionField && !FWsamMaxOptions) + { strncpy(buf,snort_conf_dir,sizeof(buf)-1); + strncpy(buf+strlen(buf),SID_MAPFILE,sizeof(buf)-strlen(buf)-1); +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam](AlertFWsamSetup) Using file: %s\n",buf); +#endif + fp=fopen(buf,"rt"); + if(!fp) + { strncpy(buf,snort_conf_dir,sizeof(buf)-1); + strncpy(buf+strlen(buf),SID_ALT_MAPFILE,sizeof(buf)-strlen(buf)-1); + fp=fopen(buf,"rt"); + } + if(fp) /* Check for presence of map file and read those in, sorted. */ + { LogMessage("INFO => [Alert_FWsam](AlertFWsamSetup) Using sid-map file: %s\n",buf); + + while(FWsamReadLine(buf,sizeof(buf),fp)) + if(*buf) + FWsamMaxOptions++; + if(FWsamMaxOptions) + { if((FWsamOptionField=(FWsamOptions *)malloc(sizeof(FWsamOptions)*FWsamMaxOptions))==NULL) + FatalError("ERROR => [Alert_FWsam](AlertFWsamSetup) malloc failed for OptionField!\n"); + fseek(fp,0,SEEK_SET); + for(cnt=0;cnt<FWsamMaxOptions;) + { FWsamReadLine(buf,sizeof(buf),fp); + if(*buf) + FWsamParseLine(&(FWsamOptionField[cnt++]),buf); + } + if(FWsamMaxOptions>1) + { for(again=TRUE,cnt=FWsamMaxOptions-1;cnt>=1 && again;cnt--) + { for(again=FALSE,i=0;i<cnt;i++) + { if(FWsamOptionField[i].sid>FWsamOptionField[i+1].sid) + { memcpy(&tempopt,&(FWsamOptionField[i]),sizeof(FWsamOptions)); + memcpy(&(FWsamOptionField[i]),&(FWsamOptionField[i+1]),sizeof(FWsamOptions)); + memcpy(&(FWsamOptionField[i+1]),&tempopt,sizeof(FWsamOptions)); + again=TRUE; + } + } + } + } + } + else + FWsamMaxOptions=1; + fclose(fp); + } + else + FWsamMaxOptions=1; + } + + + ap=args; /* start at the beginning of the argument */ + while(*ap && isspace(*ap)) ap++; + while(*ap) + { stathost=ap; /* first argument should be host */ + statport=NULL; + statpass=NULL; + while(*ap && *ap!=':' && *ap!='/' && !isspace(*ap)) ap++; /* find token */ + switch(*ap) + { case ':': *ap++=0; /* grab the port */ + statport=ap; + while(*ap && *ap!='/' && !isspace(*ap)) ap++; + if(*ap!='/') + break; + case '/': *ap++=0; /* grab the key */ + statpass=ap; + while(*ap && !isspace(*ap)) ap++; + default: break; + } + if(*ap) + { *ap++=0; + while(isspace(*ap)) ap++; + } + /* now we have the first host with port and password (key) */ + /* next we check for valid/blank password/port */ + if(statpass!=NULL) + if(!*statpass) + statpass=NULL; + if(statport!=NULL) + if(!*statport) + statport=NULL; + statip=0; + /* now we check if a valid host was specified */ + if(inet_addr(stathost)==INADDR_NONE) + { hoste=gethostbyname(stathost); + if (!hoste) + LogMessage("WARNING %s (%d) => [Alert_FWsam](AlertFWsamInit) Unable to resolve host '%s'!\n",file_name,file_line,stathost); + else + statip=*(unsigned long *)hoste->h_addr; + } + else + { statip=inet_addr(stathost); + if(!statip) + LogMessage("WARNING %s (%d) => [Alert_FWsam](AlertFWsamInit) Invalid host address '%s'!\n",file_name,file_line,stathost); + } + if(statip) + { /* groovie, a valid host. Let's alloc and assemble the structure for it. */ + if((station=(FWsamStation *)malloc(sizeof(FWsamStation)))==NULL) + FatalError("ERROR => [Alert_FWsam](AlertFWsamInit) malloc failed for station!\n"); + +// station->stationip.s_addr=statip; /* the IP address */ + station->stationip.ip32[0] = statip; /* the IP address */ + if(statport!=NULL && atoi(statport)>0) /* if the user specified one */ + station->stationport=atoi(statport); /* use users setting */ + else + station->stationport=FWSAM_DEFAULTPORT; /* set the default port */ + + if(statpass!=NULL) /* if specified by user */ + strncpy(station->stationkey,statpass,TwoFish_KEY_LENGTH); /* use defined key */ + else + station->stationkey[0]=0; + station->stationkey[TwoFish_KEY_LENGTH]=0; /* make sure it's terminated. (damn strncpy...) */ + + strcpy(station->initialkey,station->stationkey); + station->stationfish=TwoFishInit(station->stationkey); + + station->localsocketaddr.sin_port=htons(0); /* let's use dynamic ports for now */ + station->localsocketaddr.sin_addr.s_addr=0; + station->localsocketaddr.sin_family=AF_INET; + station->stationsocketaddr.sin_port=htons(station->stationport); + //station->stationsocketaddr.sin_addr=station->stationip; + station->stationsocketaddr.sin_addr.s_addr=station->stationip.ip32[0]; + station->stationsocketaddr.sin_family=AF_INET; /* load all socket crap and keep for later */ + + do + station->myseqno=rand(); /* the seqno this host will use */ + while(station->myseqno<20 || station->myseqno>65500); + station->mykeymod[0]=rand(); + station->mykeymod[1]=rand(); + station->mykeymod[2]=rand(); + station->mykeymod[3]=rand(); + station->stationseqno=0; /* peer hasn't answered yet. */ + + + if(!FWsamStationExists(station,FWsamStationList)) /* If we don't have the station already in global list....*/ + { if(FWsamCheckIn(station)) /* ...and we can talk to the agent... */ + { if((newlistp=(FWsamList *)malloc(sizeof(FWsamList)))==NULL) + FatalError("ERROR => [Alert_FWsam](AlertFWsamInit) malloc failed for global newlistp!\n"); + newlistp->station=station; + newlistp->next=NULL; + + if(!FWsamStationList) /* ... add it to the global list/ */ + FWsamStationList=newlistp; + else + { listp=FWsamStationList; + while(listp->next) + listp=listp->next; + listp->next=newlistp; + } + } + else + { TwoFishDestroy(station->stationfish); /* if not, we trash it. */ + free(station); + station=NULL; + } + } +#ifdef FWSAMDEBUG + else + LogMessage("DEBUG => [Alert_FWsam](AlertFWsamInit) Host %s:%i already in global list, skipping CheckIn.\n", sfip_ntoa(&station->stationip),station->stationport); +#endif + + if(station) + { if(!FWsamStationExists(station,fwsamlist)) /* If we don't have the station already in local list....*/ + { if((newlistp=(FWsamList *)malloc(sizeof(FWsamList)))==NULL) + FatalError("ERROR => [Alert_FWsam](AlertFWsamInit) malloc failed for local newlistp!\n"); + newlistp->station=station; + newlistp->next=NULL; + + if(!fwsamlist) /* ... add it to the local list/ */ + fwsamlist=newlistp; + else + { listp=fwsamlist; + while(listp->next) + listp=listp->next; + listp->next=newlistp; + } + } + +#ifdef FWSAMDEBUG + else + LogMessage("DEBUG => [Alert_FWsam](AlertFWsamInit) Host %s:%i already in local list, skipping.\n",sfip_ntoa(&station->stationip),station->stationport); + LogMessage("DEBUG => [Alert_FWsam](AlertFWsamInit) #%i: Host %s [%s] port %i password %s\n",++hostcnt,stathost,sfip_ntoa(&station->stationip),station->stationport,station->stationkey); +#endif + } + + } + } /* next one */ + +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam](AlertFWsamInit) Linking fwsam alert function to call list...\n"); +#endif + + /* Set the preprocessor function into the function list */ + AddFuncToOutputList(sc, AlertFWsam, OUTPUT_TYPE_FLAG__ALERT, fwsamlist); + AddFuncToCleanExitList(AlertFWsamCleanExitFunc, fwsamlist); + AddFuncToReloadList(AlertFWsamRestartFunc, fwsamlist); +} + + +/* This routine reads in a str from a file, snips white-spaces + * off the front and back, removes comments, and pretties the + * string. Returns true or false if a line was read or not. +*/ +int FWsamReadLine(char *buf,unsigned long bufsize,FILE *fp) +{ char *p; + + if(fgets(buf,bufsize-1,fp)) + { buf[bufsize-1]=0; + +#ifdef FWSAMDEBUG_off + LogMessage("DEBUG => [Alert_FWsam](AlertFWsamReadLine) Line: %s\n",buf); +#endif + + p=buf; + while(isspace(*p)) + p++; + if(p>buf); + strcpy(buf,p); + if(*buf) + { p=buf+strlen(buf)-1; /* remove leading and trailing spaces */ + while(isspace(*p)) + *p-- =0; + } + p=buf; + if(*p=='#' || *p==';') + *p=0; + else + p++; + while(*p) /* remove inline comments (except escaped #'s and ;'s) */ + { if(*p=='#' || *p==';') + { if(*(p-1)=='\\') + strcpy(p-1,p); + else + *p=0; + } + else + p++; + } + return TRUE; + } + return FALSE; +} + + +/* Parses the duration of the argument, recognizing minutes, hours, etc.. +*/ +unsigned long FWsamParseDuration(char *p) +{ unsigned long dur=0,tdu; + char *tok,c1,c2; + + while(*p) + { tok=p; + while(*p && isdigit(*p)) + p++; + if(*p) + { c1=tolower(*p); + *p=0; + p++; + if(*p && !isdigit(*p)) + { c2=tolower(*p++); + while(*p && !isdigit(*p)) + p++; + } + else + c2=0; + tdu=atol(tok); + switch(c1) + { case 'm': if(c2=='o') /* month */ + tdu*=(60*60*24*30); /* use 30 days */ + else + tdu*=60; /* minutes */ + case 's': break; /* seconds */ + case 'h': tdu*=(60*60); /* hours */ + break; + case 'd': tdu*=(60*60*24); /* days */ + break; + case 'w': tdu*=(60*60*24*7); /* week */ + break; + case 'y': tdu*=(60*60*24*365); /* year */ + break; + } + dur+=tdu; + } + else + dur+=atol(tok); + } + + return dur; +} + + +/* This routine parses an option line. It is called by FWsamParseLine, + * which parses the sid-block.map file, and also by AlertFWsamOptionInit, + * which is called by Snort when processing fwsam: options in rules. + * It returns TRUE it there is a possible option problem, otherwise FALSE. +*/ +int FWsamParseOption(FWsamOptions *optp,char *ap) +{ int possprob=FALSE; + + /* set defaults */ + + optp->duration=300; /* default of 5 minute block */ + optp->how=FWSAM_HOW_INOUT; /* inbound and outbound block */ + optp->who=FWSAM_WHO_SRC; /* the source */ + optp->loglevel=FWSAM_LOG_LONGALERT; /* the log level default */ + /* parse the fwsam keywords */ + +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam](AlertFWamOptionInit) Parse Options Args: %s\n",ap); +#endif + + if(*ap) /* should be dst/src (the WHO) or duration */ + { if(isdigit(*ap)) + optp->duration=FWsamParseDuration(ap); + else + { switch(*ap) /* yeah, we're lazy and check only the first character */ + { case 'p': ; /* permanent, perm */ + case 'f': ; /* forever */ + case 'i': optp->duration=0; /* infinite, inf */ + break; + case 'd': optp->who=FWSAM_WHO_DST; /* destination, dest, dst */ + break; + case 's': optp->who=FWSAM_WHO_SRC; /* source, src */ + break; + default: possprob=TRUE; + } + while(*ap && *ap!=',' && *ap!='[') + ap++; + if(*ap=='[') + { ap++; /* now we have the HOW */ + switch(*ap) + { case 'i': ; /* in */ + case 's': optp->how=FWSAM_HOW_IN; /* source, src */ + break; + case 'o': ; /* out */ + case 'd': optp->how=FWSAM_HOW_OUT; /* destination, dest, dst */ + break; + case 'b': ; /* both */ + case 'e': optp->how=FWSAM_HOW_INOUT; /* either */ + break; + case 't': ; /* this */ + case 'c': optp->how=FWSAM_HOW_THIS; /* connection, conn */ + break; + default: possprob=TRUE; + } + while(*ap && *ap!=',') + ap++; + } + if(*ap==',') + { ap++; + if(isdigit(*ap)) /* and figure out how long to block */ + optp->duration=FWsamParseDuration(ap); + else if(*ap=='p' || *ap=='f' || *ap=='i') + optp->duration=0; + else + possprob=TRUE; + } + else if(!*ap) + possprob=TRUE; + } + } + else + possprob=TRUE; + + return possprob; +} + + +/* This goes through the lines of sid-block.map and sets the + * options for fwsam if the file is being used. +*/ +void FWsamParseLine(FWsamOptions *optp,char *buf) +{ char *ap; + + ap=buf; /* start at the beginning of the argument */ + + while(*ap) + { if(isspace(*ap)) /* normalize spaces (tabs into space, etc) */ + *ap=' '; + if(isupper(*ap)) /* and set to lower case */ + *ap=tolower(*ap); + ap++; + } + while((ap=strrchr(buf,' '))!=NULL) /* remove spaces */ + strcpy(ap,ap+1); + + ap=buf; + if(*ap) + { while(*ap && *ap!=':' && *ap!='|') + ap++; + *ap++ =0; + while(*ap && (*ap==':' || *ap=='|')) + ap++; + + optp->sid=(unsigned long)atol(buf); + + if(FWsamParseOption(optp,ap)) + LogMessage("WARNING %s (%d) => [Alert_FWsam](AlertFWamOptionInit) Possible option problem. Using %s[%s],%lu.\n",file_name,file_line,(optp->who==FWSAM_WHO_SRC)?"src":"dst",(optp->how==FWSAM_HOW_IN)?"in":((optp->how==FWSAM_HOW_OUT)?"out":"either"),optp->duration); + } + else + optp->sid=0; +} + + + +/* + * Function: AlertFWsamOptionInit(char *data, OptTreeNode *otn, int protocol) + * + * Purpose: Parses each rule and sets the option flags in the tree. + * + * Arguments: args => ptr to argument string + * + * Returns: void function + * +*/ +void AlertFWsamOptionInit(char *args,OptTreeNode *otn,int protocol) +{ + FWsamOptions *optp; + char *ap; + + +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam](AlertFWamOptionInit) FWsamOptionInit is parsing...\n"); +#endif + + if((optp=(FWsamOptions *)malloc(sizeof(FWsamOptions)))==NULL) + FatalError("ERROR => [Alert_FWsam](AlertFWamOptionInit) malloc failed for opt!\n"); + + + ap=args; /* start at the beginning of the argument */ + + while(*ap) + { if(isspace(*ap)) /* normalize spaces (tabs into space, etc) */ + *ap=' '; + if(isupper(*ap)) /* and set to lower case */ + *ap=tolower(*ap); + ap++; + } + while((ap=strrchr(args,' '))!=NULL) /* remove spaces */ + strcpy(ap,ap+1); + + + if(FWsamParseOption(optp,args)) + LogMessage("WARNING %s (%d) => [Alert_FWsam](AlertFWamOptionInit) Possible option problem. Using %s[%s],%lu.\n",file_name,file_line,(optp->who==FWSAM_WHO_SRC)?"src":"dst",(optp->how==FWSAM_HOW_IN)?"in":((optp->how==FWSAM_HOW_OUT)?"out":"either"),optp->duration); + + otn->ds_list[PLUGIN_FWSAM]=(FWsamOptions *)optp; +} + + +/* Generates a new encryption key for TwoFish based on seq numbers and a random that + * the SnortSam agents send on checkin (in protocol) +*/ +void FWsamNewStationKey(FWsamStation *station,FWsamPacket *packet) +{ + //unsigned char newkey[TwoFish_KEY_LENGTH+2]; + char newkey[TwoFish_KEY_LENGTH+2]; + int i; + + newkey[0]=packet->snortseqno[0]; /* current snort seq # (which both know) */ + newkey[1]=packet->snortseqno[1]; + newkey[2]=packet->fwseqno[0]; /* current SnortSam seq # (which both know) */ + newkey[3]=packet->fwseqno[1]; + newkey[4]=packet->protocol[0]; /* the random SnortSam chose */ + newkey[5]=packet->protocol[1]; + + strncpy(newkey+6,station->stationkey,TwoFish_KEY_LENGTH-6); /* append old key */ + newkey[TwoFish_KEY_LENGTH]=0; + + newkey[0]^=station->mykeymod[0]; /* modify key with key modifiers which were */ + newkey[1]^=station->mykeymod[1]; /* exchanged during the check-in handshake. */ + newkey[2]^=station->mykeymod[2]; + newkey[3]^=station->mykeymod[3]; + newkey[4]^=station->fwkeymod[0]; + newkey[5]^=station->fwkeymod[1]; + newkey[6]^=station->fwkeymod[2]; + newkey[7]^=station->fwkeymod[3]; + + for(i=0;i<=7;i++) + if(newkey[i]==0) + newkey[i]++; + + strcpy(station->stationkey,newkey); + TwoFishDestroy(station->stationfish); + station->stationfish=TwoFishInit(newkey); +} + + +/* This routine will search the option list as defined + * by the sid-block.map file and return a pointer + * to the matching record. +*/ +FWsamOptions *FWsamGetOption(unsigned long sid) +{ signed long i,step,diff,o,o2; + +#ifdef FWSAM_FANCYFETCH /* Fancy-fetch jumps in decreasing n/2 steps and takes much less lookups */ + o=o2= -1; + i=step=FWsamMaxOptions>>1; + while(i>=0 && i<FWsamMaxOptions && i!=o2) + { diff=sid-FWsamOptionField[i].sid; + if(!diff) + return &(FWsamOptionField[i]); + if(step>1) + step=step>>1; + o2=o; + o=i; + if(diff>0) + i+=step; + else + i-=step; + } +#else /* This is just a sequential list lookup */ + for(i=0;i<FWsamMaxOptions;i++) + if(FWsamOptionField[i].sid==sid) + return &(FWsamOptionField[i]); +#endif + return NULL; +} + + +/**************************************************************************** + * + * Function: AlertFWsam(Packet *, char *) + * + * Purpose: Send the current alert to a remote module on a FW-1 mgmt station + * + * Arguments: p => pointer to the packet data struct + * msg => the message to print in the alert + * + * Returns: void function + * + ***************************************************************************/ +void AlertFWsam(Packet *p, char *msg, void *arg, Event *event) +{ FWsamOptions *optp; + FWsamPacket sampacket; + FWsamStation *station=NULL; + FWsamList *fwsamlist; + SOCKET stationsocket; + int i,len,deletestation,stationtry=0; + //unsigned char *encbuf,*decbuf; + char *encbuf,*decbuf; + static unsigned long lastbsip[FWSAM_REPET_BLOCKS],lastbdip[FWSAM_REPET_BLOCKS], + lastbduration[FWSAM_REPET_BLOCKS],lastbtime[FWSAM_REPET_BLOCKS]; + static unsigned short lastbsp[FWSAM_REPET_BLOCKS],lastbdp[FWSAM_REPET_BLOCKS], + lastbproto[FWSAM_REPET_BLOCKS],lastbpointer; + static unsigned char lastbmode[FWSAM_REPET_BLOCKS]; + static unsigned long btime=0; + + + if(otn_tmp==NULL) + { +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam] NULL otn_tmp!\n"); +#endif + return; + } + if(p == NULL) + { +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam] NULL packet!\n"); +#endif + return; + } + if(arg == NULL) + { +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam] NULL arg!\n"); +#endif + return; + } + + /* SnortSam does no IPv6 */ + if (!IS_IP4(p)) { +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam] not acting on non-IP4 packet!\n"); +#endif + return; + } + + optp=NULL; + + if(FWsamOptionField) /* If using the file (field present), let's use that */ + optp=FWsamGetOption(event->sig_id); + + if(!optp) /* If file not present, check if an fwsam option was defined on the triggering rule */ + optp=otn_tmp->ds_list[PLUGIN_FWSAM]; + + if(optp) /* if options specified for this rule */ + { if(!btime) /* if this is the first time this function is */ + { for(i=0;i<FWSAM_REPET_BLOCKS;i++) /* called, reset the time and protocol to 0. */ + { lastbproto[i]=0; + lastbtime[i]=0; + } + } + + fwsamlist=(FWsamList *)arg; + +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam] Alert -> Msg=\"%s\"\n",msg); + + LogMessage("DEBUG => [Alert_FWsam] Alert -> Option: %s[%s],%lu.\n",(optp->who==FWSAM_WHO_SRC)?"src":"dst",(optp->how==FWSAM_HOW_IN)?"in":((optp->how==FWSAM_HOW_OUT)?"out":"either"),optp->duration); +#endif + + len=TRUE; + btime=(unsigned long)time(NULL); /* get current time */ + /* This is a cheap check to see if the blocking request matches any of the previous requests. */ + for(i=0;i<FWSAM_REPET_BLOCKS && len;i++) + { if( ((optp->how==FWSAM_HOW_THIS)? /* if blocking mode SERVICE, check for src and dst */ + ( lastbsip[i]==p->iph->ip_src.s_addr && lastbdip[i]==p->iph->ip_dst.s_addr &&lastbproto[i]==p->iph->ip_proto && + ((p->iph->ip_proto==IPPROTO_TCP || p->iph->ip_proto==IPPROTO_UDP)? /* check port only of TCP or UDP */ +/* ((optp->who==FWSAM_WHO_SRC)?(lastbsp[i]==p->sp):(lastbdp[i]==p->dp)):TRUE) ): */ + lastbdp[i]==p->dp:TRUE) ): + ((optp->who==FWSAM_WHO_SRC)?(lastbsip[i]==p->iph->ip_src.s_addr):(lastbdip[i]==p->iph->ip_dst.s_addr))) && /* otherwise if we block source, only compare source. Same for dest. */ + lastbduration[i]==optp->duration && + (lastbmode[i]&(FWSAM_HOW|FWSAM_WHO))==(optp->how|optp->who) && + (btime-lastbtime[i]<((optp->duration>FWSAM_REPET_TIME)?FWSAM_REPET_TIME:optp->duration))) + { len=FALSE; /* If so, we don't need to block again. */ + } + } + if(len) + { if(++lastbpointer>=FWSAM_REPET_BLOCKS) /* increase repetitive check pointer */ + lastbpointer=0; + lastbsip[lastbpointer]=p->iph->ip_src.s_addr; /* and note packet details */ + lastbdip[lastbpointer]=p->iph->ip_dst.s_addr; + lastbduration[lastbpointer]=optp->duration; + lastbmode[lastbpointer]=optp->how|optp->who|optp->loglevel; + lastbproto[lastbpointer]=p->iph->ip_proto; + if(p->iph->ip_proto==IPPROTO_TCP || p->iph->ip_proto==IPPROTO_UDP) + { lastbsp[lastbpointer]=p->sp; /* set ports if TCP or UDP */ + lastbdp[lastbpointer]=p->dp; + } + lastbtime[lastbpointer]=btime; + + + while(fwsamlist!=NULL) + { station=fwsamlist->station; + //if(station->stationip.s_addr) + if(station->stationip.ip32[0]) + { deletestation=FALSE; + stationtry++; /* first try */ + /* create a socket for the station */ + stationsocket=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP); + if(stationsocket==INVALID_SOCKET) + FatalError("ERROR => [Alert_FWsam] Funky socket error (socket)!\n"); + if(bind(stationsocket,(struct sockaddr *)&(station->localsocketaddr),sizeof(struct sockaddr))) + FatalError("ERROR => [Alert_FWsam] Could not bind socket!\n"); + + /* let's connect to the agent */ + if(connect(stationsocket,(struct sockaddr *)&station->stationsocketaddr,sizeof(struct sockaddr))) + { + LogMessage("WARNING => [Alert_FWsam] Could not send block to host %s. Will try later.\n",sfip_ntoa(&station->stationip)); +#ifdef WIN32 + closesocket(stationsocket); +#else + close(stationsocket); +#endif + stationtry=0; + } + else + { +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam] Connected to host %s.\n",sfip_ntoa(&station->stationip)); +#endif + /* now build the packet */ + station->myseqno+=station->stationseqno; /* increase my seqno by adding agent seq no */ + sampacket.endiancheck=1; /* This is an endian indicator for Snortsam */ + sampacket.snortseqno[0]=(char)station->myseqno; + sampacket.snortseqno[1]=(char)(station->myseqno>>8); + sampacket.fwseqno[0]=(char)station->stationseqno;/* fill station seqno */ + sampacket.fwseqno[1]=(char)(station->stationseqno>>8); + sampacket.status=FWSAM_STATUS_BLOCK; /* set block mode */ + sampacket.version=FWSAM_PACKETVERSION; /* set packet version */ + sampacket.duration[0]=(char)optp->duration; /* set duration */ + sampacket.duration[1]=(char)(optp->duration>>8); + sampacket.duration[2]=(char)(optp->duration>>16); + sampacket.duration[3]=(char)(optp->duration>>24); + sampacket.fwmode=optp->how|optp->who|optp->loglevel; /* set the mode */ + sampacket.dstip[0]=(char)p->iph->ip_dst.s_addr; /* destination IP */ + sampacket.dstip[1]=(char)(p->iph->ip_dst.s_addr>>8); + sampacket.dstip[2]=(char)(p->iph->ip_dst.s_addr>>16); + sampacket.dstip[3]=(char)(p->iph->ip_dst.s_addr>>24); + sampacket.srcip[0]=(char)p->iph->ip_src.s_addr; /* source IP */ + sampacket.srcip[1]=(char)(p->iph->ip_src.s_addr>>8); + sampacket.srcip[2]=(char)(p->iph->ip_src.s_addr>>16); + sampacket.srcip[3]=(char)(p->iph->ip_src.s_addr>>24); + sampacket.protocol[0]=(char)p->iph->ip_proto; /* protocol */ + sampacket.protocol[1]=(char)(p->iph->ip_proto>>8);/* protocol */ + + if(p->iph->ip_proto==IPPROTO_TCP || p->iph->ip_proto==IPPROTO_UDP) + { sampacket.srcport[0]=(char)p->sp; /* set ports */ + sampacket.srcport[1]=(char)(p->sp>>8); + sampacket.dstport[0]=(char)p->dp; + sampacket.dstport[1]=(char)(p->dp>>8); + } + else + sampacket.srcport[0]=sampacket.srcport[1]=sampacket.dstport[0]=sampacket.dstport[1]=0; + + sampacket.sig_id[0]=(char)event->sig_id; /* set signature ID */ + sampacket.sig_id[1]=(char)(event->sig_id>>8); + sampacket.sig_id[2]=(char)(event->sig_id>>16); + sampacket.sig_id[3]=(char)(event->sig_id>>24); + +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam] Sending BLOCK\n"); + LogMessage("DEBUG => [Alert_FWsam] Snort SeqNo: %x\n",station->myseqno); + LogMessage("DEBUG => [Alert_FWsam] Mgmt SeqNo : %x\n",station->stationseqno); + LogMessage("DEBUG => [Alert_FWsam] Status : %i\n",FWSAM_STATUS_BLOCK); + LogMessage("DEBUG => [Alert_FWsam] Mode : %i\n",optp->how|optp->who|optp->loglevel); + LogMessage("DEBUG => [Alert_FWsam] Duration : %li\n",optp->duration); + LogMessage("DEBUG => [Alert_FWsam] Protocol : %i\n",GET_IPH_PROTO(p)); + LogMessage("DEBUG => [Alert_FWsam] Src IP : %s\n",sfip_ntoa(GET_SRC_IP(p))); + LogMessage("DEBUG => [Alert_FWsam] Dest IP : %s\n",sfip_ntoa(GET_DST_IP(p))); + LogMessage("DEBUG => [Alert_FWsam] Src Port : %i\n",p->sp); + LogMessage("DEBUG => [Alert_FWsam] Dest Port : %i\n",p->dp); + LogMessage("DEBUG => [Alert_FWsam] Sig_ID : %lu\n",event->sig_id); + +#endif + + encbuf=TwoFishAlloc(sizeof(FWsamPacket),FALSE,FALSE,station->stationfish); /* get the encryption buffer */ + len=TwoFishEncrypt((char *)&sampacket,&encbuf,sizeof(FWsamPacket),FALSE,station->stationfish); /* encrypt the packet with current key */ + + if(send(stationsocket,encbuf,len,0)!=len) /* weird...could not send */ + { LogMessage("WARNING => [Alert_FWsam] Could not send to host %s. Will try again later.\n",sfip_ntoa(&station->stationip)); +#ifdef WIN32 + closesocket(stationsocket); +#else + close(stationsocket); +#endif + stationtry=0; + } + else + { i=FWSAM_NETWAIT; +#ifdef WIN32 + ioctlsocket(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ +#else + ioctl(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ +#endif + while(i-- >1) /* the response packet */ + { waitms(10); /* wait for response (default maximum 3 secs */ + if(recv(stationsocket,encbuf,len,0)==len) + i=0; /* if we received packet we set the counter to 0. */ + /* by the time we check with if, it's already dec'ed to -1 */ + } + if(!i) /* id we timed out (i was one, then dec'ed)... */ + { LogMessage("WARNING => [Alert_FWsam] Did not receive response from host %s. Will try again later.\n",sfip_ntoa(&station->stationip)); +#ifdef WIN32 + closesocket(stationsocket); +#else + close(stationsocket); +#endif + stationtry=0; + } + else /* got a packet */ + { decbuf=(char *)&sampacket; /* get the pointer to the packet struct */ + len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* try to decrypt the packet with current key */ + + if(len!=sizeof(FWsamPacket)) /* invalid decryption */ + { strcpy(station->stationkey,station->initialkey); /* try the intial key */ + TwoFishDestroy(station->stationfish); + station->stationfish=TwoFishInit(station->stationkey); /* re-initialize the TwoFish with the intial key */ + len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* try again to decrypt */ + LogMessage("INFO => [Alert_FWsam] Had to use initial key!\n"); + } + if(len==sizeof(FWsamPacket)) /* valid decryption */ + { if(sampacket.version==FWSAM_PACKETVERSION)/* master speaks my language */ + { if(sampacket.status==FWSAM_STATUS_OK || sampacket.status==FWSAM_STATUS_NEWKEY + || sampacket.status==FWSAM_STATUS_RESYNC || sampacket.status==FWSAM_STATUS_HOLD) + { station->stationseqno=sampacket.fwseqno[0] | (sampacket.fwseqno[1]<<8); /* get stations seqno */ + station->lastcontact=(unsigned long)time(NULL); /* set the last contact time (not used yet) */ +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam] Received %s\n",sampacket.status==FWSAM_STATUS_OK?"OK": + sampacket.status==FWSAM_STATUS_NEWKEY?"NEWKEY": + sampacket.status==FWSAM_STATUS_RESYNC?"RESYNC": + sampacket.status==FWSAM_STATUS_HOLD?"HOLD":"ERROR"); + LogMessage("DEBUG => [Alert_FWsam] Snort SeqNo: %x\n",sampacket.snortseqno[0]|(sampacket.snortseqno[1]<<8)); + LogMessage("DEBUG => [Alert_FWsam] Mgmt SeqNo : %x\n",station->stationseqno); + LogMessage("DEBUG => [Alert_FWsam] Status : %i\n",sampacket.status); + LogMessage("DEBUG => [Alert_FWsam] Version : %i\n",sampacket.version); +#endif + if(sampacket.status==FWSAM_STATUS_HOLD) + { i=FWSAM_NETHOLD; /* Stay on hold for a maximum of 60 secs (default) */ + while(i-- >1) /* the response packet */ + { waitms(10); /* wait for response */ + if(recv(stationsocket,encbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,0)==sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE) + i=0; /* if we received packet we set the counter to 0. */ + } + if(!i) /* id we timed out (i was one, then dec'ed)... */ + { LogMessage("WARNING => [Alert_FWsam] Did not receive response from host %s. Will try again later.\n",sfip_ntoa(&station->stationip)); + stationtry=0; + sampacket.status=FWSAM_STATUS_ERROR; + } + else /* got a packet */ + { decbuf=(char *)&sampacket; /* get the pointer to the packet struct */ + len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* try to decrypt the packet with current key */ + + if(len!=sizeof(FWsamPacket)) /* invalid decryption */ + { strcpy(station->stationkey,station->initialkey); /* try the intial key */ + TwoFishDestroy(station->stationfish); + station->stationfish=TwoFishInit(station->stationkey); /* re-initialize the TwoFish with the intial key */ + len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* try again to decrypt */ + LogMessage("INFO => [Alert_FWsam] Had to use initial key again!\n"); + } +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam] Received %s\n",sampacket.status==FWSAM_STATUS_OK?"OK": + sampacket.status==FWSAM_STATUS_NEWKEY?"NEWKEY": + sampacket.status==FWSAM_STATUS_RESYNC?"RESYNC": + sampacket.status==FWSAM_STATUS_HOLD?"HOLD":"ERROR"); + LogMessage("DEBUG => [Alert_FWsam] Snort SeqNo: %x\n",sampacket.snortseqno[0]|(sampacket.snortseqno[1]<<8)); + LogMessage("DEBUG => [Alert_FWsam] Mgmt SeqNo : %x\n",station->stationseqno); + LogMessage("DEBUG => [Alert_FWsam] Status : %i\n",sampacket.status); + LogMessage("DEBUG => [Alert_FWsam] Version : %i\n",sampacket.version); +#endif + if(len!=sizeof(FWsamPacket)) /* invalid decryption */ + { ErrorMessage("ERROR => [Alert_FWsam] Password mismatch! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); + deletestation=TRUE; + sampacket.status=FWSAM_STATUS_ERROR; + } + else if(sampacket.version!=FWSAM_PACKETVERSION) /* invalid protocol version */ + { ErrorMessage("ERROR => [Alert_FWsam] Protocol version error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); + deletestation=TRUE; + sampacket.status=FWSAM_STATUS_ERROR; + } + else if(sampacket.status!=FWSAM_STATUS_OK && sampacket.status!=FWSAM_STATUS_NEWKEY && sampacket.status!=FWSAM_STATUS_RESYNC) + { ErrorMessage("ERROR => [Alert_FWsam] Funky handshake error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); + deletestation=TRUE; + sampacket.status=FWSAM_STATUS_ERROR; + } + } + } + if(sampacket.status==FWSAM_STATUS_RESYNC) /* if station want's to resync... */ + { strcpy(station->stationkey,station->initialkey); /* ...we use the intial key... */ + memcpy(station->fwkeymod,sampacket.duration,4); /* and note the random key modifier */ + } + if(sampacket.status==FWSAM_STATUS_NEWKEY || sampacket.status==FWSAM_STATUS_RESYNC) + { + FWsamNewStationKey(station,&sampacket); /* generate new TwoFish keys */ +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam] Generated new encryption key...\n"); +#endif + } +#ifdef WIN32 + closesocket(stationsocket); +#else + close(stationsocket); +#endif + stationtry=0; + } + else if(sampacket.status==FWSAM_STATUS_ERROR) /* if SnortSam reports an error on second try, */ + { +#ifdef WIN32 + closesocket(stationsocket); /* something is messed up and ... */ +#else + close(stationsocket); +#endif + if(stationtry>1) /* we ignore that station. */ + { deletestation=TRUE; /* flag for deletion */ + ErrorMessage("ERROR => [Alert_FWsam] Could not renegotiate key! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); + } + else /* if we get an error on the first try, */ + { if(!FWsamCheckIn(station)) /* we first try to check in again. */ + { deletestation=TRUE; + ErrorMessage("ERROR => [Alert_FWsam] Password mismatch! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); + } + } + } + else /* an unknown status means trouble... */ + { ErrorMessage("ERROR => [Alert_FWsam] Funky handshake error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); +#ifdef WIN32 + closesocket(stationsocket); +#else + close(stationsocket); +#endif + deletestation=TRUE; + } + } + else /* if the SnortSam agent uses a different packet version, we have no choice but to ignore it. */ + { ErrorMessage("ERROR => [Alert_FWsam] Protocol version error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); +#ifdef WIN32 + closesocket(stationsocket); +#else + close(stationsocket); +#endif + deletestation=TRUE; + } + } + else /* if the intial key failed to decrypt as well, the keys are not configured the same, and we ignore that SnortSam station. */ + { ErrorMessage("ERROR => [Alert_FWsam] Password mismatch! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); +#ifdef WIN32 + closesocket(stationsocket); +#else + close(stationsocket); +#endif + deletestation=TRUE; + } + } + } + free(encbuf); /* release of the TwoFishAlloc'ed encryption buffer */ + } + if(stationtry==0 || deletestation) /* if everything went real well, or real bad... */ + { if(deletestation){ /* If it went bad, we remove the station from the list by marking the IP */ +// station->stationip.s_addr=0; + station->stationip.ip32[0]=0; + } + fwsamlist=fwsamlist->next; + } + } + else + fwsamlist=fwsamlist->next; + } + } + else + { +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam] Skipping repetitive block.\n"); +#endif + } + } +} + +/* FWsamCheckOut will be called when Snort exists. It de-registeres this snort sensor + * from the list of sensor that the SnortSam agent keeps. + */ +void FWsamCheckOut(FWsamStation *station) +{ FWsamPacket sampacket; + SOCKET stationsocket; + int i,len; + char *encbuf,*decbuf; + //unsigned char *encbuf,*decbuf; + + + stationsocket=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP); + if(stationsocket==INVALID_SOCKET) + FatalError("ERROR => [Alert_FWsam](FWsamCheckOut) Funky socket error (socket)!\n"); + if(bind(stationsocket,(struct sockaddr *)&(station->localsocketaddr),sizeof(struct sockaddr))) + FatalError("ERROR => [Alert_FWsam](FWsamCheckOut) Could not bind socket!\n"); + + /* let's connect to the agent */ + if(!connect(stationsocket,(struct sockaddr *)&station->stationsocketaddr,sizeof(struct sockaddr))) + { LogMessage("INFO => [Alert_FWsam](FWsamCheckOut) Disconnecting from host %s.\n",sfip_ntoa(&station->stationip)); + /* now build the packet */ + station->myseqno+=station->stationseqno; /* increase my seqno */ + sampacket.endiancheck=1; + sampacket.snortseqno[0]=(char)station->myseqno; + sampacket.snortseqno[1]=(char)(station->myseqno>>8); + sampacket.fwseqno[0]=(char)station->stationseqno; /* fill station seqno */ + sampacket.fwseqno[1]=(char)(station->stationseqno>>8); + sampacket.status=FWSAM_STATUS_CHECKOUT; /* checking out... */ + sampacket.version=FWSAM_PACKETVERSION; + +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckOut) Sending CHECKOUT\n"); + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckOut) Snort SeqNo: %x\n",station->myseqno); + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckOut) Mgmt SeqNo : %x\n",station->stationseqno); + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckOut) Status : %i\n",sampacket.status); + +#endif + + encbuf=TwoFishAlloc(sizeof(FWsamPacket),FALSE,FALSE,station->stationfish); /* get encryption buffer */ + len=TwoFishEncrypt((char *)&sampacket,&encbuf,sizeof(FWsamPacket),FALSE,station->stationfish); /* encrypt packet with current key */ + + if(send(stationsocket,encbuf,len,0)==len) + { i=FWSAM_NETWAIT; +#ifdef WIN32 + ioctlsocket(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ +#else + ioctl(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ +#endif + while(i-- >1) + { waitms(10); /* ...wait a maximum of 3 secs for response... */ + if(recv(stationsocket,encbuf,len,0)==len) /* ... for the status packet */ + i=0; + } + if(i) /* if we got the packet */ + { decbuf=(char *)&sampacket; + len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); + + if(len!=sizeof(FWsamPacket)) /* invalid decryption */ + { strcpy(station->stationkey,station->initialkey); /* try initial key */ + TwoFishDestroy(station->stationfish); /* toss this fish */ + station->stationfish=TwoFishInit(station->stationkey); /* re-initialze TwoFish with initial key */ + len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* and try to decrypt again */ + LogMessage("INFO => [Alert_FWsam](FWsamCheckOut) Had to use initial key!\n"); + } + if(len==sizeof(FWsamPacket)) /* valid decryption */ + { if(sampacket.version!=FWSAM_PACKETVERSION) /* but don't really care since we are on the way out */ + ErrorMessage("WARNING => [Alert_FWsam](FWsamCheckOut) Protocol version error! What the hell, we're quitting anyway! :)\n"); + } + else + ErrorMessage("WARNING => [Alert_FWsam](FWsamCheckOut) Password mismatch! What the hell, we're quitting anyway! :)\n"); + } + } + free(encbuf); /* release TwoFishAlloc'ed buffer */ + } + else + LogMessage("WARNING => [Alert_FWsam] Could not connect to host %s for CheckOut. What the hell, we're quitting anyway! :)\n",sfip_ntoa(&station->stationip)); +#ifdef WIN32 + closesocket(stationsocket); +#else + close(stationsocket); +#endif +} + + +/* FWSamFree: Disconnects all FW-1 management stations, + * closes sockets, and frees the structures. + */ +void FWsamFree(FWsamList *list) +{ + FWsamList *next; + + while(list) /* Free pointer list for rule type */ + { + next=list->next; + free(list); + list=next; + } + list=FWsamStationList; + + while(list) /* Free global pointer list and stations */ + { + next=list->next; + if (list->station) + { + if(list->station->stationip.ip32[0]) + //if(list->station->stationip.s_addr) + FWsamCheckOut(list->station); /* Send a Check-Out to SnortSam, */ + + TwoFishDestroy(list->station->stationfish); /* toss the fish, */ + free(list->station); /* free station, */ + } + free(list); /* free pointer, */ + list=next; /* and move to next. */ + } + FWsamStationList=NULL; + if(FWsamOptionField) + free(FWsamOptionField); +} + +void AlertFWsamCleanExitFunc(int signal, void *arg) +{ FWsamList *fwsamlist; + +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam](AlertFWsamCleanExitFunc) Exiting...\n"); +#endif + + fwsamlist=(FWsamList *)arg; + FWsamFree(fwsamlist); /* Free all elements */ +} + +void AlertFWsamRestartFunc(int signal, void *arg) +{ FWsamList *fwsamlist; + +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam](AlertFWsamRestartFunc) Restarting...\n"); +#endif + + fwsamlist=(FWsamList *)arg; + FWsamFree(fwsamlist); /* Free all elements */ +} + +/* This routine registers this Snort sensor with SnortSam. + * It will also change the encryption key based on some variables. + */ +int FWsamCheckIn(FWsamStation *station) +{ int i,len,stationok=TRUE; + FWsamPacket sampacket; + char *encbuf,*decbuf; + //unsigned char *encbuf,*decbuf; + SOCKET stationsocket; + + + /* create a socket for the station */ + stationsocket=socket(PF_INET,SOCK_STREAM,IPPROTO_TCP); + if(stationsocket==INVALID_SOCKET) + FatalError("ERROR => [Alert_FWsam](FWsamCheckIn) Funky socket error (socket)!\n"); + if(bind(stationsocket,(struct sockaddr *)&(station->localsocketaddr),sizeof(struct sockaddr))) + FatalError("ERROR => [Alert_FWsam](FWsamCheckIn) Could not bind socket!\n"); + + i=TRUE; + /* let's connect to the agent */ + if(connect(stationsocket,(struct sockaddr *)&station->stationsocketaddr,sizeof(struct sockaddr))) + LogMessage("WARNING => [Alert_FWsam](FWsamCheckIn) Could not connect to host %s. Will try later.\n",sfip_ntoa(&station->stationip)); + else + { LogMessage("INFO => [Alert_FWsam](FWsamCheckIn) Connected to host %s.\n",sfip_ntoa(&station->stationip)); + /* now build the packet */ + sampacket.endiancheck=1; + sampacket.snortseqno[0]=(char)station->myseqno; /* fill my sequence number number */ + sampacket.snortseqno[1]=(char)(station->myseqno>>8); /* fill my sequence number number */ + sampacket.status=FWSAM_STATUS_CHECKIN; /* let's check in */ + sampacket.version=FWSAM_PACKETVERSION; /* set the packet version */ + memcpy(sampacket.duration,station->mykeymod,4); /* we'll send SnortSam our key modifier in the duration slot */ + /* (the checkin packet is just the plain initial key) */ +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Sending CheckIn\n"); + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Snort SeqNo: %x\n",station->myseqno); + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Mode : %i\n",sampacket.status); + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Version : %i\n",sampacket.version); +#endif + encbuf=TwoFishAlloc(sizeof(FWsamPacket),FALSE,FALSE,station->stationfish); /* get buffer for encryption */ + len=TwoFishEncrypt((char *)&sampacket,&encbuf,sizeof(FWsamPacket),FALSE,station->stationfish); /* encrypt with initial key */ + if(send(stationsocket,encbuf,len,0)!=len) /* weird...could not send */ + LogMessage("WARNING => [Alert_FWsam](FWsamCheckIn) Could not send to host %s. Will try again later.\n",sfip_ntoa(&station->stationip)); + else + { i=FWSAM_NETWAIT; +#ifdef WIN32 + ioctlsocket(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ +#else + ioctl(stationsocket,FIONBIO,&i); /* set non blocking and wait for */ +#endif + while(i-- >1) + { waitms(10); /* wait a maximum of 3 secs for response */ + if(recv(stationsocket,encbuf,len,0)==len) + i=0; + } + if(!i) /* time up? */ + LogMessage("WARNING => [Alert_FWsam](FWsamCheckIn) Did not receive response from host %s. Will try again later.\n",sfip_ntoa(&station->stationip)); + else + { decbuf=(char *)&sampacket; /* got status packet */ + len=TwoFishDecrypt(encbuf,&decbuf,sizeof(FWsamPacket)+TwoFish_BLOCK_SIZE,FALSE,station->stationfish); /* try to decrypt with initial key */ + if(len==sizeof(FWsamPacket)) /* valid decryption */ + { +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Received %s\n",sampacket.status==FWSAM_STATUS_OK?"OK": + sampacket.status==FWSAM_STATUS_NEWKEY?"NEWKEY": + sampacket.status==FWSAM_STATUS_RESYNC?"RESYNC": + sampacket.status==FWSAM_STATUS_HOLD?"HOLD":"ERROR"); + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Snort SeqNo: %x\n",sampacket.snortseqno[0]|(sampacket.snortseqno[1]<<8)); + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Mgmt SeqNo : %x\n",sampacket.fwseqno[0]|(sampacket.fwseqno[1]<<8)); + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Status : %i\n",sampacket.status); + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Version : %i\n",sampacket.version); +#endif + if(sampacket.version==FWSAM_PACKETVERSION) /* master speaks my language */ + { if(sampacket.status==FWSAM_STATUS_OK || sampacket.status==FWSAM_STATUS_NEWKEY || sampacket.status==FWSAM_STATUS_RESYNC) + { station->stationseqno=sampacket.fwseqno[0]|(sampacket.fwseqno[1]<<8); /* get stations seqno */ + station->lastcontact=(unsigned long)time(NULL); + + if(sampacket.status==FWSAM_STATUS_NEWKEY || sampacket.status==FWSAM_STATUS_RESYNC) /* generate new keys */ + { memcpy(station->fwkeymod,sampacket.duration,4); /* note the key modifier */ + FWsamNewStationKey(station,&sampacket); /* and generate new TwoFish keys (with key modifiers) */ +#ifdef FWSAMDEBUG + LogMessage("DEBUG => [Alert_FWsam](FWsamCheckIn) Generated new encryption key...\n"); +#endif + } + } + else /* weird, got a strange status back */ + { ErrorMessage("ERROR => [Alert_FWsam](FWsamCheckIn) Funky handshake error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); + stationok=FALSE; + } + } + else /* packet version does not match */ + { ErrorMessage("ERROR =>[Alert_FWsam](FWsamCheckIn) Protocol version error! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); + stationok=FALSE; + } + } + else /* key does not match */ + { ErrorMessage("ERROR => [Alert_FWsam](FWsamCheckIn) Password mismatch! Ignoring host %s.\n",sfip_ntoa(&station->stationip)); + stationok=FALSE; + } + } + } + free(encbuf); /* release TwoFishAlloc'ed buffer */ + } +#ifdef WIN32 + closesocket(stationsocket); +#else + close(stationsocket); +#endif + return stationok; +} +#undef FWSAMDEBUG + diff -uNr snort-2.9.5.orig/src/output-plugins/spo_alert_fwsam.h snort-2.9.5/src/output-plugins/spo_alert_fwsam.h --- snort-2.9.5.orig/src/output-plugins/spo_alert_fwsam.h 1970-01-01 01:00:00.000000000 +0100 +++ snort-2.9.5/src/output-plugins/spo_alert_fwsam.h 2013-07-08 22:58:55.050670868 +0200 @@ -0,0 +1,216 @@ +/* $Id: snortpatchb,v 1.5 2005/10/06 08:50:39 fknobbe Exp $ +** +** spo_alert_fwsam.h +** +** Copyright (c) 2001-2004 Frank Knobbe <frank@knobbe.us> +** +** This program is free software; you can redistribute it and/or modify +** it under the terms of the GNU General Public License as published by +** the Free Software Foundation; either version 2 of the License, or +** (at your option) any later version. +** +** This program is distributed in the hope that it will be useful, +** but WITHOUT ANY WARRANTY; without even the implied warranty of +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +** GNU General Public License for more details. +** +** You should have received a copy of the GNU General Public License +** along with this program; if not, write to the Free Software +** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +*/ + +/* This file gets included in plugbase.c when it is integrated into the rest + * of the program. + * + * For more info, see the beginning of spo_alert_fwsam.c + * + */ + +#ifndef __SPO_FWSAM_H__ +#define __SPO_FWSAM_H__ + +#include "snort.h" +#include "rules.h" +#include "plugbase.h" +#include "plugin_enum.h" +#include "fatal.h" +#include "util.h" +#include "twofish.h" + +#include <stdlib.h> +#include <stdio.h> +#include <time.h> +#include <string.h> +#include <ctype.h> +#include <unistd.h> + + +/* just some compatibility stuff */ +#ifdef WIN32 +#if !defined(_WINSOCKAPI_) && !defined(_WINSOCK2API_) +#include <winsock.h> +#endif +#define waitms(x) Sleep(x) + +#else + +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <sys/ioctl.h> +#include <netdb.h> + +#ifdef SOLARIS +#include <sys/filio.h> +#endif + +typedef int SOCKET; + +#ifndef INVALID_SOCKET +#define INVALID_SOCKET -1 +#endif + +#define waitms(x) usleep((x)*1000) + +#endif + +#ifndef FALSE +#define FALSE 0 +#endif +#ifndef TRUE +#define TRUE !FALSE +#endif +#ifndef bool +#define bool int +#endif + + +#if defined(_DEBUG) || defined(DEBUG) +#ifndef FWSAMDEBUG +#define FWSAMDEBUG +#endif +#else +#endif + + +/* Official Snort PlugIn Number has been moved into plugin_enum.h */ + + +/* fixed defines */ + +#define FWSAM_DEFAULTPORT 898 /* Default port if user does not specify one in snort.conf */ + /* (Was unused last time I checked...) */ +#define FWSAM_PACKETVERSION 14 /* version of the packet. Will increase with enhancements. */ + +#define FWSAM_STATUS_CHECKIN 1 /* snort to fw */ +#define FWSAM_STATUS_CHECKOUT 2 +#define FWSAM_STATUS_BLOCK 3 +#define FWSAM_STATUS_UNBLOCK 9 + +#define FWSAM_STATUS_OK 4 /* fw to snort */ +#define FWSAM_STATUS_ERROR 5 +#define FWSAM_STATUS_NEWKEY 6 +#define FWSAM_STATUS_RESYNC 7 +#define FWSAM_STATUS_HOLD 8 + +#define FWSAM_LOG_NONE 0 +#define FWSAM_LOG_SHORTLOG 1 +#define FWSAM_LOG_SHORTALERT 2 +#define FWSAM_LOG_LONGLOG 3 +#define FWSAM_LOG_LONGALERT 4 +#define FWSAM_LOG (FWSAM_LOG_SHORTLOG|FWSAM_LOG_SHORTALERT|FWSAM_LOG_LONGLOG|FWSAM_LOG_LONGALERT) +#define FWSAM_WHO_DST 8 +#define FWSAM_WHO_SRC 16 +#define FWSAM_WHO (FWSAM_WHO_DST|FWSAM_WHO_SRC) +#define FWSAM_HOW_IN 32 +#define FWSAM_HOW_OUT 64 +#define FWSAM_HOW_INOUT (FWSAM_HOW_IN|FWSAM_HOW_OUT) +#define FWSAM_HOW_THIS 128 +#define FWSAM_HOW (FWSAM_HOW_IN|FWSAM_HOW_OUT|FWSAM_HOW_THIS) + + +/* user adjustable defines */ + +#define FWSAM_REPET_BLOCKS 10 /* Snort remembers this amount of last blocks and... */ +#define FWSAM_REPET_TIME 20 /* ...checks if they fall within this time. If so,... */ + /* ...the blocking request is not send. */ + +#define FWSAM_NETWAIT 300 /* 100th of a second. 3 sec timeout for network connections */ +#define FWSAM_NETHOLD 6000 /* 100th of a second. 60 sec timeout for holding */ + +#define SID_MAPFILE "sid-block.map" +#define SID_ALT_MAPFILE "sid-fwsam.map" + +#define FWSAM_FANCYFETCH /* This will invoke a fast sid lookup routine */ + + +/* vars */ + +typedef struct _FWsamstation /* structure of a mgmt station */ +{ unsigned short myseqno; + unsigned short stationseqno; + unsigned char mykeymod[4]; + unsigned char fwkeymod[4]; + unsigned short stationport; + //struct in_addr stationip; + sfip_t stationip; + struct sockaddr_in localsocketaddr; + struct sockaddr_in stationsocketaddr; + TWOFISH *stationfish; + char initialkey[TwoFish_KEY_LENGTH+2]; + char stationkey[TwoFish_KEY_LENGTH+2]; + time_t lastcontact; +/* time_t sleepstart; */ +} FWsamStation; + +typedef struct _FWsampacket /* 2 blocks (3rd block is header from TwoFish) */ +{ unsigned short endiancheck; /* 0 */ + unsigned char srcip[4]; /* 2 */ + unsigned char dstip[4]; /* 6 */ + unsigned char duration[4]; /* 10 */ + unsigned char snortseqno[2]; /* 14 */ + unsigned char fwseqno[2]; /* 16 */ + unsigned char srcport[2]; /* 18 */ + unsigned char dstport[2]; /* 20 */ + unsigned char protocol[2]; /* 22 */ + unsigned char fwmode; /* 24 */ + unsigned char version; /* 25 */ + unsigned char status; /* 26 */ + unsigned char sig_id[4]; /* 27 */ + unsigned char fluff; /* 31 */ +} FWsamPacket; /* 32 bytes in size */ + +typedef struct _FWsamoptions /* snort rule options */ +{ unsigned long sid; + unsigned long duration; + unsigned char who; + unsigned char how; + unsigned char loglevel; +} FWsamOptions; + +typedef struct _FWsamlistpointer +{ FWsamStation *station; + struct _FWsamlistpointer *next; +} FWsamList; + + +/* functions */ +void AlertFWsamSetup(void); +void AlertFWsamInit(struct _SnortConfig *sc,char *args); +void AlertFWsamOptionInit(char *args,OptTreeNode *otn,int protocol); +void AlertFWsamCleanExitFunc(int signal, void *arg); +void AlertFWsamRestartFunc(int signal, void *arg); +void AlertFWsam(Packet *p, char *msg, void *arg, Event *event); +int FWsamCheckIn(FWsamStation *station); +void FWsamCheckOut(FWsamStation *station); +void FWsamNewStationKey(FWsamStation *station,FWsamPacket *packet); +void FWsamFixPacketEndian(FWsamPacket *p); +unsigned long FWsamParseDuration(char *p); +void FWsamFree(FWsamList *fwsamlist); +int FWsamStationExists(FWsamStation *who,FWsamList *list); +int FWsamReadLine(char *,unsigned long,FILE *); +void FWsamParseLine(FWsamOptions *,char *); +FWsamOptions *FWsamGetOption(unsigned long); +int FWsamParseOption(FWsamOptions *,char *); + +#endif /* __SPO_FWSAM_H__ */ diff -uNr snort-2.9.5.orig/src/plugbase.c snort-2.9.5/src/plugbase.c --- snort-2.9.5.orig/src/plugbase.c 2013-06-04 23:19:52.000000000 +0200 +++ snort-2.9.5/src/plugbase.c 2013-07-08 22:58:33.186668664 +0200 @@ -120,6 +120,7 @@ #endif #include "output-plugins/spo_alert_test.h" +#include "output-plugins/spo_alert_fwsam.h" extern ListHead *head_tmp; extern PreprocConfigFuncNode *preproc_config_funcs; @@ -1547,6 +1548,7 @@ #endif AlertTestSetup(); + AlertFWsamSetup(); } /**************************************************************************** diff -uNr snort-2.9.5.orig/src/plugbase.c.orig snort-2.9.5/src/plugbase.c.orig --- snort-2.9.5.orig/src/plugbase.c.orig 1970-01-01 01:00:00.000000000 +0100 +++ snort-2.9.5/src/plugbase.c.orig 2013-06-04 23:19:52.000000000 +0200 @@ -0,0 +1,1902 @@ +/* $Id$ */ +/* +** Copyright (C) 2002-2013 Sourcefire, Inc. +** Copyright (C) 1998-2002 Martin Roesch <roesch@sourcefire.com> +** +** This program is free software; you can redistribute it and/or modify +** it under the terms of the GNU General Public License Version 2 as +** published by the Free Software Foundation. You may not use, modify or +** distribute this program under any other version of the GNU General +** Public License. +** +** This program is distributed in the hope that it will be useful, +** but WITHOUT ANY WARRANTY; without even the implied warranty of +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +** GNU General Public License for more details. +** +** You should have received a copy of the GNU General Public License +** along with this program; if not, write to the Free Software +** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +*/ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <sys/types.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> + +#ifdef HAVE_STRINGS_H +#include <strings.h> +#endif + +#ifndef WIN32 +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#endif /* !WIN32 */ +#include <time.h> +#include <errno.h> + +#include "sf_types.h" +#include "plugbase.h" +#include "spo_plugbase.h" +#include "snort.h" +#include "snort_debug.h" +#include "util.h" +#include "log.h" +#include "detect.h" + +/* built-in preprocessors */ +#include "preprocessors/spp_rpc_decode.h" +#include "preprocessors/spp_bo.h" +#include "preprocessors/spp_stream5.h" +#include "preprocessors/spp_arpspoof.h" +#include "preprocessors/spp_perfmonitor.h" +#include "preprocessors/spp_httpinspect.h" +#include "preprocessors/spp_sfportscan.h" +#include "preprocessors/spp_frag3.h" +#include "preprocessors/spp_normalize.h" + +/* built-in detection plugins */ +#include "detection-plugins/sp_pattern_match.h" +#include "detection-plugins/sp_tcp_flag_check.h" +#include "detection-plugins/sp_icmp_type_check.h" +#include "detection-plugins/sp_icmp_code_check.h" +#include "detection-plugins/sp_ttl_check.h" +#include "detection-plugins/sp_ip_id_check.h" +#include "detection-plugins/sp_tcp_ack_check.h" +#include "detection-plugins/sp_tcp_seq_check.h" +#include "detection-plugins/sp_dsize_check.h" +#include "detection-plugins/sp_ipoption_check.h" +#include "detection-plugins/sp_rpc_check.h" +#include "detection-plugins/sp_icmp_id_check.h" +#include "detection-plugins/sp_icmp_seq_check.h" +#include "detection-plugins/sp_session.h" +#include "detection-plugins/sp_ip_tos_check.h" +#include "detection-plugins/sp_ip_fragbits.h" +#include "detection-plugins/sp_tcp_win_check.h" +#include "detection-plugins/sp_ip_same_check.h" +#include "detection-plugins/sp_ip_proto.h" +#include "detection-plugins/sp_ip_same_check.h" +#include "detection-plugins/sp_clientserver.h" +#include "detection-plugins/sp_byte_check.h" +#include "detection-plugins/sp_byte_jump.h" +#include "detection-plugins/sp_byte_extract.h" +#include "detection-plugins/sp_isdataat.h" +#include "detection-plugins/sp_pcre.h" +#include "detection-plugins/sp_flowbits.h" +#include "detection-plugins/sp_file_data.h" +#include "detection-plugins/sp_base64_decode.h" +#include "detection-plugins/sp_base64_data.h" +#include "detection-plugins/sp_pkt_data.h" +#include "detection-plugins/sp_asn1.h" +#ifdef ENABLE_REACT +#include "detection-plugins/sp_react.h" +#endif +#ifdef ENABLE_RESPOND +#include "detection-plugins/sp_respond.h" +#endif +#include "detection-plugins/sp_ftpbounce.h" +#include "detection-plugins/sp_urilen_check.h" +#include "detection-plugins/sp_cvs.h" + +/* built-in output plugins */ +#include "output-plugins/spo_alert_syslog.h" +#include "output-plugins/spo_log_tcpdump.h" +#include "output-plugins/spo_alert_fast.h" +#include "output-plugins/spo_alert_full.h" +#include "output-plugins/spo_alert_unixsock.h" +#include "output-plugins/spo_csv.h" +#include "output-plugins/spo_log_null.h" +#include "output-plugins/spo_log_ascii.h" +#include "output-plugins/spo_unified2.h" + +#ifdef LINUX +#include "output-plugins/spo_alert_sf_socket.h" +#endif + +#include "output-plugins/spo_alert_test.h" + +extern ListHead *head_tmp; +extern PreprocConfigFuncNode *preproc_config_funcs; +extern OutputConfigFuncNode *output_config_funcs; +extern RuleOptConfigFuncNode *rule_opt_config_funcs; +extern RuleOptOverrideInitFuncNode *rule_opt_override_init_funcs; +extern RuleOptParseCleanupNode *rule_opt_parse_cleanup_list; +extern RuleOptByteOrderFuncNode *rule_opt_byte_order_funcs; +extern PreprocSignalFuncNode *preproc_clean_exit_funcs; +extern PreprocSignalFuncNode *preproc_shutdown_funcs; +extern PreprocSignalFuncNode *preproc_reset_funcs; +extern PreprocSignalFuncNode *preproc_reset_stats_funcs; +extern PreprocStatsFuncNode *preproc_stats_funcs; +extern PluginSignalFuncNode *plugin_shutdown_funcs; +extern PluginSignalFuncNode *plugin_clean_exit_funcs; +#ifdef SNORT_RELOAD +extern PostConfigFuncNode *plugin_reload_funcs; +#endif +extern OutputFuncNode *AlertList; +extern OutputFuncNode *LogList; +extern PeriodicCheckFuncNode *periodic_check_funcs; + +/**************************** Detection Plugin API ****************************/ +/* For translation from enum to char* */ +#ifdef DEBUG_MSGS +static const char *optTypeMap[OPT_TYPE_MAX] = +{ + "action", + "logging", + "detection" +}; + +#define ENUM2STR(num, map) \ + ((num < sizeof(map)/sizeof(map[0])) ? map[num] : "undefined") +#endif + + +void RegisterRuleOptions(void) +{ + LogMessage("Initializing Plug-ins!\n"); + + SetupPatternMatch(); + SetupTCPFlagCheck(); + SetupIcmpTypeCheck(); + SetupIcmpCodeCheck(); + SetupTtlCheck(); + SetupIpIdCheck(); + SetupTcpAckCheck(); + SetupTcpSeqCheck(); + SetupDsizeCheck(); + SetupIpOptionCheck(); + SetupRpcCheck(); + SetupIcmpIdCheck(); + SetupIcmpSeqCheck(); + SetupSession(); + SetupIpTosCheck(); + SetupFragBits(); + SetupFragOffset(); + SetupTcpWinCheck(); + SetupIpProto(); + SetupIpSameCheck(); + SetupClientServer(); + SetupPktData(); + SetupByteTest(); + SetupByteJump(); + SetupByteExtract(); + SetupIsDataAt(); + SetupFileData(); + SetupBase64Decode(); + SetupBase64Data(); + SetupPcre(); + SetupFlowBits(); + SetupAsn1(); +#ifdef ENABLE_REACT + SetupReact(); +#endif +#ifdef ENABLE_RESPOND + SetupRespond(); +#endif + SetupFTPBounce(); + SetupUriLenCheck(); + SetupCvs(); +} + +/**************************************************************************** + * + * Function: RegisterRuleOption(char *, void (*func)(), enum OptionType) + * + * Purpose: Associates a rule option keyword with an option setup/linking + * function. + * + * Arguments: keyword => The option keyword to associate with the option + * handler + * *func => function pointer to the handler + * type => used to determine where keyword is allowed + * + * Returns: void function + * + ***************************************************************************/ +void RegisterRuleOption(char *opt_name, RuleOptConfigFunc ro_config_func, + RuleOptOverrideInitFunc override_init_func, + RuleOptType opt_type, + RuleOptOtnHandler otn_handler) +{ + RuleOptConfigFuncNode *node; + + DEBUG_WRAP(DebugMessage(DEBUG_PLUGIN, "Registering keyword:func => %s/%s:%p\n", + ENUM2STR(opt_type, optTypeMap), opt_name, ro_config_func);); + + node = (RuleOptConfigFuncNode *)SnortAlloc(sizeof(RuleOptConfigFuncNode)); + + if (rule_opt_config_funcs == NULL) + { + rule_opt_config_funcs = node; + } + else + { + RuleOptConfigFuncNode *tmp = rule_opt_config_funcs; + RuleOptConfigFuncNode *last; + + do + { + if (strcasecmp(tmp->keyword, opt_name) == 0) + { + free(node); + FatalError("%s(%d) Duplicate detection plugin keyword: %s.\n", + file_name, file_line, opt_name); + } + + last = tmp; + tmp = tmp->next; + + } while (tmp != NULL); + + last->next = node; + } + + node->keyword = SnortStrdup(opt_name); + node->type = opt_type; + node->func = ro_config_func; + node->otn_handler = otn_handler; + + if (override_init_func != NULL) + { + RuleOptOverrideInitFuncNode *node_override = + (RuleOptOverrideInitFuncNode *)SnortAlloc(sizeof(RuleOptOverrideInitFuncNode)); + + if (rule_opt_override_init_funcs == NULL) + { + rule_opt_override_init_funcs = node_override; + } + else + { + RuleOptOverrideInitFuncNode *tmp = rule_opt_override_init_funcs; + RuleOptOverrideInitFuncNode *last; + + do + { + if (strcasecmp(tmp->keyword, opt_name) == 0) + { + free(node_override); + FatalError("RegisterRuleOption: Duplicate detection plugin keyword:" + " (%s) (%s)!\n", tmp->keyword, opt_name); + } + + last = tmp; + tmp = tmp->next; + + } while (tmp != NULL); + + last->next = node_override; + } + + node_override->keyword = SnortStrdup(opt_name); + node_override->type = opt_type; + node_override->func = override_init_func; + node_override->otn_handler = otn_handler; + } +} + +void RegisterOverrideKeyword(char *keyword, char *option, RuleOptOverrideFunc roo_func) +{ + RuleOptOverrideInitFuncNode *node = rule_opt_override_init_funcs; + + while (node != NULL) + { + if (strcasecmp(node->keyword, keyword) == 0) + { + node->func(keyword, option, roo_func); + break; + } + + node = node->next; + } +} + +void RegisterByteOrderKeyword(char *keyword, RuleOptByteOrderFunc roo_func) +{ + RuleOptByteOrderFuncNode *node = (RuleOptByteOrderFuncNode *)SnortAlloc(sizeof(RuleOptByteOrderFuncNode)); + RuleOptByteOrderFuncNode *list = rule_opt_byte_order_funcs; + RuleOptByteOrderFuncNode *last; + + node->keyword = SnortStrdup(keyword); + node->func = roo_func; + node->next = NULL; + + if (list == NULL) + rule_opt_byte_order_funcs = node; + else + { + while (list != NULL) + { + if (strcasecmp(node->keyword, list->keyword) == 0) + { + free(node->keyword); + free(node); + return; + } + + last = list; + list = list->next; + } + + last->next = node; + } +} + +RuleOptByteOrderFunc GetByteOrderFunc(char *keyword) +{ + RuleOptByteOrderFuncNode *node = rule_opt_byte_order_funcs; + + while (node != NULL) + { + if (strcasecmp(keyword, node->keyword) == 0) + return node->func; + + node = node->next; + } + + return NULL; +} + +/**************************************************************************** + * + * Function: DumpPlugIns() + * + * Purpose: Prints the keyword->function list + * + * Arguments: None. + * + * Returns: void function + * + ***************************************************************************/ +void DumpRuleOptions(void) +{ + RuleOptConfigFuncNode *node; + + node = rule_opt_config_funcs; + + LogMessage("-------------------------------------------------\n"); + LogMessage(" Keyword | Plugin Registered @\n"); + LogMessage("-------------------------------------------------\n"); + + while (node != NULL) + { + LogMessage("%-13s: %p\n", node->keyword, (void *)node->vfunc); + node = node->next; + } + + LogMessage("-------------------------------------------------\n"); + LogMessage("\n"); +} + + +/**************************************************************************** + * + * Function: AddOptFuncToList(int (*func)(), OptTreeNode *) + * + * Purpose: Links the option detection module to the OTN + * + * Arguments: (*func)() => function pointer to the detection module + * otn => pointer to the current OptTreeNode + * + * Returns: void function + * + ***************************************************************************/ +OptFpList * AddOptFuncToList(RuleOptEvalFunc ro_eval_func, OptTreeNode *otn) +{ + OptFpList *ofp = (OptFpList *)SnortAlloc(sizeof(OptFpList)); + + DEBUG_WRAP(DebugMessage(DEBUG_CONFIGRULES,"Adding new rule to list\n");); + + /* if there are no nodes on the function list... */ + if (otn->opt_func == NULL) + { + otn->opt_func = ofp; + } + else + { + OptFpList *tmp = otn->opt_func; + + /* walk to the end of the list */ + while (tmp->next != NULL) + tmp = tmp->next; + + tmp->next = ofp; + } + + DEBUG_WRAP(DebugMessage(DEBUG_CONFIGRULES,"Set OptTestFunc to %p\n", ro_eval_func);); + + ofp->OptTestFunc = ro_eval_func; + + return ofp; +} + +/**************************************************************************** + * + * Function: AddRspFuncToList(int (*func)(), OptTreeNode *) + * + * Purpose: Adds Response function to OTN + * + * Arguments: (*func)() => function pointer to the response module + * otn => pointer to the current OptTreeNode + * + * Returns: void function + * + ***************************************************************************/ +// TBD this can prolly be replaced with a single item +// because we allow at most one response per packet +void AddRspFuncToList(ResponseFunc resp_func, OptTreeNode *otn, void *params) +{ + RspFpList *rsp = (RspFpList *)SnortAlloc(sizeof(RspFpList)); + + DEBUG_WRAP(DebugMessage(DEBUG_CONFIGRULES,"Adding response to list\n");); + + /* if there are no nodes on the function list... */ + if (otn->rsp_func == NULL) + { + otn->rsp_func = rsp; + } + else + { + RspFpList *tmp = otn->rsp_func; + + /* walk to the end of the list */ + while (tmp->next != NULL) + tmp = tmp->next; + + tmp->next = rsp; + } + + DEBUG_WRAP(DebugMessage(DEBUG_CONFIGRULES,"Set ResponseFunc to %p\n", resp_func);); + + rsp->func = resp_func; + rsp->params = params; +} + +void PostConfigInitPlugins(struct _SnortConfig *sc, PostConfigFuncNode *post_config_funcs) +{ + while (post_config_funcs != NULL) + { + post_config_funcs->func(sc, 0, post_config_funcs->arg); + post_config_funcs = post_config_funcs->next; + } +} + +void FreeRuleOptConfigFuncs(RuleOptConfigFuncNode *head) +{ + + while (head != NULL) + { + RuleOptConfigFuncNode *tmp = head; + + head = head->next; + + if (tmp->keyword != NULL) + free(tmp->keyword); + + free(tmp); + } +} + +void FreeRuleOptOverrideInitFuncs(RuleOptOverrideInitFuncNode *head) +{ + + while (head != NULL) + { + RuleOptOverrideInitFuncNode *tmp = head; + + head = head->next; + + if (tmp->keyword != NULL) + free(tmp->keyword); + + free(tmp); + } +} + +void FreeRuleOptByteOrderFuncs(RuleOptByteOrderFuncNode *head) +{ + while (head != NULL) + { + RuleOptByteOrderFuncNode *tmp = head; + + head = head->next; + + if (tmp->keyword != NULL) + free(tmp->keyword); + + free(tmp); + } +} + +void FreePluginSigFuncs(PluginSignalFuncNode *head) +{ + while (head != NULL) + { + PluginSignalFuncNode *tmp = head; + + head = head->next; + + /* don't free sig->arg, that's free'd by the CleanExit func */ + free(tmp); + } +} + +void FreePluginPostConfigFuncs(PostConfigFuncNode *head) +{ + while (head != NULL) + { + PostConfigFuncNode *tmp = head; + + head = head->next; + + /* don't free sig->arg, that's free'd by the CleanExit func */ + free(tmp); + } +} + +/************************** Non Rule Detection Plugin API *********************/ +DetectionEvalFuncNode * AddFuncToDetectionList(SnortConfig *sc, + DetectionEvalFunc detect_eval_func, + uint16_t priority, uint32_t detect_id, + uint32_t proto_mask) +{ + DetectionEvalFuncNode *node; + tSfPolicyId policy_id = getParserPolicy(sc); + SnortPolicy *p; + + if (sc == NULL) + { + FatalError("%s(%d) Snort config for parsing is NULL.\n", + __FILE__, __LINE__); + } + + p = sc->targeted_policies[policy_id]; + if (p == NULL) + return NULL; + + DEBUG_WRAP(DebugMessage(DEBUG_CONFIGRULES, + "Adding detection function ID %d/bit %d/pri %d to list\n", + detect_id, p->num_detects, priority);); + + node = (DetectionEvalFuncNode *)SnortAlloc(sizeof(DetectionEvalFuncNode)); + + if (p->detect_eval_funcs == NULL) + { + p->detect_eval_funcs = node; + } + else + { + DetectionEvalFuncNode *tmp = p->detect_eval_funcs; + DetectionEvalFuncNode *last = NULL; + + do + { + if (tmp->detect_id == detect_id) + { + free(node); + FatalError("Detection function already registered with ID %d\n", + detect_id); + } + + /* Insert higher priority preprocessors first. Lower priority + * number means higher priority */ + if (priority < tmp->priority) + break; + + last = tmp; + tmp = tmp->next; + + } while (tmp != NULL); + + /* Priority higher than first item in list */ + if (last == NULL) + { + node->next = tmp; + p->detect_eval_funcs = node; + } + else + { + node->next = tmp; + last->next = node; + } + } + + node->func = detect_eval_func; + node->priority = priority; + node->detect_id = detect_id; + //node->detect_bit = (1 << detect_id); + node->proto_mask = proto_mask; + + p->num_detects++; + p->detect_proto_mask |= proto_mask; + //p->detect_bit_mask |= node->detect_bit; + + return node; +} + +void FreeDetectionEvalFuncs(DetectionEvalFuncNode *head) +{ + DetectionEvalFuncNode *tmp; + + while (head != NULL) + { + tmp = head->next; + //if (head->context) + // free(head->context); + free(head); + head = tmp; + } +} + +/************************** Preprocessor Plugin API ***************************/ +static void AddFuncToPreprocSignalList(PreprocSignalFunc, void *, + PreprocSignalFuncNode **, uint16_t, uint32_t); + + +void RegisterPreprocessors(void) +{ + LogMessage("Initializing Preprocessors!\n"); + + SetupARPspoof(); +#ifdef NORMALIZER + SetupNormalizer(); +#endif + SetupFrag3(); + SetupStream5(); + SetupRpcDecode(); + SetupBo(); + SetupHttpInspect(); + SetupPerfMonitor(); + SetupSfPortscan(); +} + +/**************************************************************************** + * + * Function: RegisterPreprocessor(char *, void (*)(char *)) + * + * Purpose: Associates a preprocessor statement with its function. + * + * Arguments: keyword => The option keyword to associate with the + * preprocessor + * *func => function pointer to the handler + * + * Returns: void function + * + ***************************************************************************/ +#ifndef SNORT_RELOAD +void RegisterPreprocessor(const char *keyword, PreprocConfigFunc pp_config_func) +#else +void RegisterPreprocessor(const char *keyword, PreprocConfigFunc pp_config_func, + PreprocReloadFunc rfunc, PreprocReloadVerifyFunc rvfunc, + PreprocReloadSwapFunc sfunc, PreprocReloadSwapFreeFunc ffunc) +#endif +{ + PreprocConfigFuncNode *node = + (PreprocConfigFuncNode *)SnortAlloc(sizeof(PreprocConfigFuncNode)); + + DEBUG_WRAP(DebugMessage(DEBUG_PLUGIN,"Registering keyword:preproc => %s:%p\n", keyword, pp_config_func);); + + if (preproc_config_funcs == NULL) + { + preproc_config_funcs = node; + } + else + { + PreprocConfigFuncNode *tmp = preproc_config_funcs; + PreprocConfigFuncNode *last; + + do + { + if (strcasecmp(tmp->keyword, keyword) == 0) + { + free(node); + FatalError("Duplicate preprocessor keyword: %s.\n", keyword); + } + + last = tmp; + tmp = tmp->next; + + } while (tmp != NULL); + + last->next = node; + } + + node->keyword = SnortStrdup(keyword); + node->config_func = pp_config_func; + +#ifdef SNORT_RELOAD + node->reload_func = rfunc; + node->reload_verify_func = rvfunc; + node->reload_swap_func = sfunc; + node->reload_swap_free_func = ffunc; +#endif +} + +#ifdef SNORT_RELOAD +void *GetRelatedReloadData(SnortConfig *sc, const char *keyword) +{ + PreprocessorSwapData *swapData; + for (swapData = sc->preprocSwapData; swapData; swapData = swapData->next) + { + if (swapData->preprocNode && swapData->preprocNode->keyword && + strcasecmp(swapData->preprocNode->keyword, keyword) == 0) + { + return swapData->data; + } + } + return NULL; +} + +void *GetReloadStreamConfig(SnortConfig *sc) +{ + return sc->streamReloadConfig; +} +#endif + +PreprocConfigFuncNode * GetPreprocConfig(char *keyword) +{ + PreprocConfigFuncNode *head = preproc_config_funcs; + + if (keyword == NULL) + return NULL; + + while (head != NULL) + { + if (strcasecmp(head->keyword, keyword) == 0) + return head; + + head = head->next; + } + + return NULL; +} + +PreprocConfigFunc GetPreprocConfigFunc(char *keyword) +{ + PreprocConfigFuncNode *head = preproc_config_funcs; + + if (keyword == NULL) + return NULL; + + while (head != NULL) + { + if (strcasecmp(head->keyword, keyword) == 0) + return head->config_func; + + head = head->next; + } + + return NULL; +} + +/**************************************************************************** + * + * Function: RegisterPreprocStats(char *keyword, void (*func)(int)) + * + * Purpose: Registers a function for printing preprocessor final stats + * (or other if it has a use for printing final stats) + * + * Arguments: keyword => keyword (preprocessor) whose stats will print + * func => function pointer to the handler + * + * Returns: void function + * + ***************************************************************************/ +void RegisterPreprocStats(const char *keyword, PreprocStatsFunc pp_stats_func) +{ + PreprocStatsFuncNode *node; + + DEBUG_WRAP(DebugMessage(DEBUG_PLUGIN,"Registering final stats function: " + "preproc => %s:%p\n", keyword, pp_stats_func);); + + node = (PreprocStatsFuncNode *)SnortAlloc(sizeof(PreprocStatsFuncNode)); + + if (preproc_stats_funcs == NULL) + { + preproc_stats_funcs = node; + } + else + { + PreprocStatsFuncNode *tmp = preproc_stats_funcs; + PreprocStatsFuncNode *last; + + do + { + if (strcasecmp(tmp->keyword, keyword) == 0) + { + free(node); + FatalError("Duplicate preprocessor keyword: %s.\n", keyword); + } + + last = tmp; + tmp = tmp->next; + + } while (tmp != NULL); + + last->next = node; + } + + node->keyword = SnortStrdup(keyword); + node->func = pp_stats_func; +} + +/**************************************************************************** + * + * Function: DumpPreprocessors() + * + * Purpose: Prints the keyword->preprocess list + * + * Arguments: None. + * + * Returns: void function + * + ***************************************************************************/ +void DumpPreprocessors(void) +{ + PreprocConfigFuncNode *node = preproc_config_funcs; + + LogMessage("-------------------------------------------------\n"); + LogMessage(" Keyword | Preprocessor @ \n"); + LogMessage("-------------------------------------------------\n"); + + while (node != NULL) + { + LogMessage("%-13s: %p\n", node->keyword, node->config_vfunc); + node = node->next; + } + + LogMessage("-------------------------------------------------\n\n"); +} + +int IsPreprocEnabled(SnortConfig *sc, uint32_t preproc_id) +{ + PreprocEvalFuncNode *node; + tSfPolicyId policy_id = getParserPolicy(sc); + SnortPolicy *p; + + if (sc == NULL) + { + FatalError("%s(%d) Snort config for parsing is NULL.\n", + __FILE__, __LINE__); + } + + p = sc->targeted_policies[policy_id]; + if (p == NULL) + return 0; + + for (node = p->preproc_eval_funcs; node != NULL; node = node->next) + { + if (node->preproc_id == preproc_id) + return 1; + } + + return 0; +} + +PreprocEvalFuncNode * AddFuncToPreprocList(SnortConfig *sc, PreprocEvalFunc pp_eval_func, uint16_t priority, + uint32_t preproc_id, uint32_t proto_mask) +{ + PreprocEvalFuncNode *node; + tSfPolicyId policy_id = getParserPolicy(sc); + SnortPolicy *p; + + if (sc == NULL) + { + FatalError("%s(%d) Snort config for parsing is NULL.\n", + __FILE__, __LINE__); + } + + p = sc->targeted_policies[policy_id]; + if (p == NULL) + return NULL; + + DEBUG_WRAP(DebugMessage(DEBUG_CONFIGRULES, + "Adding preprocessor function ID %d/bit %d/pri %d to list\n", + preproc_id, p->num_preprocs, priority);); + + node = (PreprocEvalFuncNode *)SnortAlloc(sizeof(PreprocEvalFuncNode)); + + if (p->preproc_eval_funcs == NULL) + { + p->preproc_eval_funcs = node; + } + else + { + PreprocEvalFuncNode *tmp = p->preproc_eval_funcs; + PreprocEvalFuncNode *last = NULL; + + do + { + if (tmp->preproc_id == preproc_id) + { + free(node); + FatalError("Preprocessor already registered with ID %d\n", + preproc_id); + } + + /* Insert higher priority preprocessors first. Lower priority + * number means higher priority */ + if (priority < tmp->priority) + break; + + last = tmp; + tmp = tmp->next; + + } while (tmp != NULL); + + /* Priority higher than first item in list */ + if (last == NULL) + { + node->next = tmp; + p->preproc_eval_funcs = node; + } + else + { + node->next = tmp; + last->next = node; + } + } + + node->func = pp_eval_func; + node->priority = priority; + node->preproc_id = preproc_id; + node->preproc_bit = (1 << preproc_id); + node->proto_mask = proto_mask; + + p->num_preprocs++; + p->preproc_proto_mask |= proto_mask; + p->preproc_bit_mask |= node->preproc_bit; + + return node; +} + +PreprocMetaEvalFuncNode * AddFuncToPreprocMetaEvalList( + SnortConfig *sc, + PreprocMetaEvalFunc pp_meta_eval_func, + uint16_t priority, + uint32_t preproc_id) +{ + PreprocMetaEvalFuncNode *node; + tSfPolicyId policy_id = getParserPolicy(sc); + SnortPolicy *p; + + if (sc == NULL) + { + FatalError("%s(%d) Snort config for parsing is NULL.\n", + __FILE__, __LINE__); + } + +#ifndef HAVE_DAQ_ACQUIRE_WITH_META + WarningMessage("Metadata not available for processing. Not registering Preprocessor Meta Eval id %d\n", preproc_id); + return NULL; // Not supported +#endif + + p = sc->targeted_policies[policy_id]; + if (p == NULL) + return NULL; + + DEBUG_WRAP(DebugMessage(DEBUG_CONFIGRULES, + "Adding preprocessor function ID %d/bit %d/pri %d to list\n", + preproc_id, p->num_preprocs, priority);); + + node = (PreprocMetaEvalFuncNode *)SnortAlloc(sizeof(PreprocMetaEvalFuncNode)); + + if (p->preproc_meta_eval_funcs == NULL) + { + p->preproc_meta_eval_funcs = node; + SetupMetadataCallback(); + } + else + { + PreprocMetaEvalFuncNode *tmp = p->preproc_meta_eval_funcs; + PreprocMetaEvalFuncNode *last = NULL; + + do + { + if (tmp->preproc_id == preproc_id) + { + free(node); + FatalError("Preprocessor Meta Eval already registered with ID %d\n", + preproc_id); + } + + /* Insert higher priority preprocessors first. Lower priority + * number means higher priority */ + if (priority < tmp->priority) + break; + + last = tmp; + tmp = tmp->next; + + } while (tmp != NULL); + + /* Priority higher than first item in list */ + if (last == NULL) + { + node->next = tmp; + p->preproc_meta_eval_funcs = node; + } + else + { + node->next = tmp; + last->next = node; + } + } + + node->func = pp_meta_eval_func; + node->priority = priority; + node->preproc_id = preproc_id; + node->preproc_bit = (1 << preproc_id); + + p->num_meta_preprocs++; + p->preproc_meta_bit_mask |= node->preproc_bit; + + return node; +} + +void AddFuncToPreprocPostConfigList(SnortConfig *sc, PreprocPostConfigFunc pp_post_config_func, + void *data) +{ + PreprocPostConfigFuncNode *node; + + if (sc == NULL) + { + FatalError("%s(%d) Snort config for parsing is NULL.\n", + __FILE__, __LINE__); + } + + node = (PreprocPostConfigFuncNode *)SnortAlloc(sizeof(PreprocPostConfigFuncNode)); + + if (sc->preproc_post_config_funcs == NULL) + { + sc->preproc_post_config_funcs = node; + } + else + { + PreprocPostConfigFuncNode *tmp = sc->preproc_post_config_funcs; + + while (tmp->next != NULL) + tmp = tmp->next; + + tmp->next = node; + } + + node->data = data; + node->func = pp_post_config_func; +} + +void PostConfigPreprocessors(SnortConfig *sc) +{ + PreprocPostConfigFuncNode *list; + + if (sc == NULL) + { + FatalError("%s(%d) Snort config is NULL.\n", + __FILE__, __LINE__); + } + + list = sc->preproc_post_config_funcs; + + for (; list != NULL; list = list->next) + { + if (list->func != NULL) + list->func(sc, list->data); + } +} + +void FilterConfigPreprocessors(SnortConfig *sc) +{ + tSfPolicyId policy_id; + SnortPolicy *p; + PreprocEvalFuncNode *node; + PreprocEvalFuncNode **list; + PreprocEvalFuncNode **free_list; + + if (sc == NULL) + { + ParseError("%s(%d) Snort config is NULL.\n", + __FILE__, __LINE__); + } + + if (!sc->disable_all_policies) + return; + + policy_id = getParserPolicy(sc); + p = sc->targeted_policies[policy_id]; + if (p == NULL) + return; + + list = &p->preproc_eval_funcs; + free_list = &p->unused_preproc_eval_funcs; + + while ((node = *list) != NULL) + { + if (node->preproc_bit & sc->reenabled_preprocessor_bits) + { + list = &node->next; + } + else + { + *list = node->next; + node->next = NULL; + *free_list = node; + free_list = &node->next; + } + } +} + +#ifdef SNORT_RELOAD +void SwapPreprocConfigurations(SnortConfig *sc) +{ + PreprocessorSwapData *node; + PreprocConfigFuncNode *preproc; + + for (node = sc->preprocSwapData; node != NULL; node = node->next) + { + if ((preproc = node->preprocNode) && preproc->reload_swap_func) + node->data = preproc->reload_swap_func(sc, node->data); + } +} + +void FreeSwappedPreprocConfigurations(struct _SnortConfig *sc) +{ + PreprocessorSwapData *node; + PreprocConfigFuncNode *preproc; + + for (node = sc->preprocSwapData; node != NULL; node = node->next) + { + if (node->data && (preproc = node->preprocNode) && preproc->reload_swap_free_func) + { + preproc->reload_swap_free_func(node->data); + node->data = NULL; + } + } +} +#endif + +void AddFuncToConfigCheckList(SnortConfig *sc, PreprocCheckConfigFunc pp_chk_config_func) +{ + PreprocCheckConfigFuncNode *node; + + if (sc == NULL) + { + FatalError("%s(%d) Snort config for parsing is NULL.\n", + __FILE__, __LINE__); + } + + node = (PreprocCheckConfigFuncNode *)SnortAlloc(sizeof(PreprocCheckConfigFuncNode)); + + if (sc->preproc_config_check_funcs == NULL) + { + sc->preproc_config_check_funcs = node; + } + else + { + PreprocCheckConfigFuncNode *tmp = sc->preproc_config_check_funcs; + + while (tmp->next != NULL) + tmp = tmp->next; + + tmp->next = node; + } + + node->func = pp_chk_config_func; +} + +/* functions to aid in cleaning up after plugins */ +void AddFuncToPreprocCleanExitList(PreprocSignalFunc pp_sig_func, void *arg, + uint16_t priority, uint32_t preproc_id) +{ + AddFuncToPreprocSignalList(pp_sig_func, arg, &preproc_clean_exit_funcs, priority, preproc_id); +} + +void AddFuncToPreprocShutdownList(PreprocSignalFunc pp_shutdown_func, void *arg, + uint16_t priority, uint32_t preproc_id) +{ + AddFuncToPreprocSignalList(pp_shutdown_func, arg, &preproc_shutdown_funcs, priority, preproc_id); +} + +void AddFuncToPreprocResetList(PreprocSignalFunc pp_sig_func, void *arg, + uint16_t priority, uint32_t preproc_id) +{ + AddFuncToPreprocSignalList(pp_sig_func, arg, &preproc_reset_funcs, priority, preproc_id); +} + +void AddFuncToPreprocResetStatsList(PreprocSignalFunc pp_sig_func, void *arg, + uint16_t priority, uint32_t preproc_id) +{ + AddFuncToPreprocSignalList(pp_sig_func, arg, &preproc_reset_stats_funcs, priority, preproc_id); +} + +static void AddFuncToPreprocSignalList(PreprocSignalFunc pp_sig_func, void *arg, + PreprocSignalFuncNode **list, + uint16_t priority, uint32_t preproc_id) +{ + PreprocSignalFuncNode *node; + + if (list == NULL) + return; + + node = (PreprocSignalFuncNode *)SnortAlloc(sizeof(PreprocSignalFuncNode)); + + if (*list == NULL) + { + *list = node; + } + else + { + PreprocSignalFuncNode *tmp = *list; + PreprocSignalFuncNode *last = NULL; + + do + { + /* Insert higher priority stuff first. Lower priority + * number means higher priority */ + if (priority < tmp->priority) + break; + + last = tmp; + tmp = tmp->next; + + } while (tmp != NULL); + + /* Priority higher than first item in list */ + if (last == NULL) + { + node->next = tmp; + *list = node; + } + else + { + node->next = tmp; + last->next = node; + } + } + + node->func = pp_sig_func; + node->arg = arg; + node->preproc_id = preproc_id; + node->priority = priority; +} + +void AddFuncToPeriodicCheckList(PeriodicFunc periodic_func, void *arg, + uint16_t priority, uint32_t preproc_id, uint32_t period ) +{ + PeriodicCheckFuncNode **list= &periodic_check_funcs; + PeriodicCheckFuncNode *node; + + if (list == NULL) + return; + + node = (PeriodicCheckFuncNode *)SnortAlloc(sizeof(PeriodicCheckFuncNode)); + + if (*list == NULL) + { + *list = node; + } + else + { + PeriodicCheckFuncNode *tmp = *list; + PeriodicCheckFuncNode *last = NULL; + + do + { + /* Insert higher priority stuff first. Lower priority + * number means higher priority */ + if (priority < tmp->priority) + break; + + last = tmp; + tmp = tmp->next; + + } while (tmp != NULL); + + /* Priority higher than first item in list */ + if (last == NULL) + { + node->next = tmp; + *list = node; + } + else + { + node->next = tmp; + last->next = node; + } + } + + node->func = periodic_func; + node->arg = arg; + node->preproc_id = preproc_id; + node->priority = priority; + node->period = period; + node->time_left = period; +} + +void FreePreprocConfigFuncs(void) +{ + PreprocConfigFuncNode *head = preproc_config_funcs; + PreprocConfigFuncNode *tmp; + + while (head != NULL) + { + tmp = head->next; + if (head->keyword != NULL) + free(head->keyword); + free(head); + head = tmp; + } +} + +void FreePreprocCheckConfigFuncs(PreprocCheckConfigFuncNode *head) +{ + PreprocCheckConfigFuncNode *tmp; + + while (head != NULL) + { + tmp = head->next; + free(head); + head = tmp; + } +} + +void FreePreprocPostConfigFuncs(PreprocPostConfigFuncNode *head) +{ + PreprocPostConfigFuncNode *tmp; + + while (head != NULL) + { + tmp = head->next; + free(head); + head = tmp; + } +} + +void FreePreprocStatsFuncs(PreprocStatsFuncNode *head) +{ + PreprocStatsFuncNode *tmp; + + while (head != NULL) + { + tmp = head->next; + if (head->keyword != NULL) + free(head->keyword); + free(head); + head = tmp; + } +} + +void FreePreprocEvalFuncs(PreprocEvalFuncNode *head) +{ + PreprocEvalFuncNode *tmp; + + while (head != NULL) + { + tmp = head->next; + //if (head->context) + // free(head->context); + free(head); + head = tmp; + } +} + +void FreePreprocMetaEvalFuncs(PreprocMetaEvalFuncNode *head) +{ + PreprocMetaEvalFuncNode *tmp; + + while (head != NULL) + { + tmp = head->next; + //if (head->context) + // free(head->context); + free(head); + head = tmp; + } +} + +void FreePreprocSigFuncs(PreprocSignalFuncNode *head) +{ + PreprocSignalFuncNode *tmp; + + while (head != NULL) + { + tmp = head->next; + /* don't free sig->arg, that's free'd by the CleanExit func */ + free(head); + head = tmp; + } +} + +void FreePeriodicFuncs(PeriodicCheckFuncNode *head) +{ + PeriodicCheckFuncNode *tmp; + + while (head != NULL) + { + tmp = head->next; + /* don't free sig->arg, that's free'd by the CleanExit func */ + free(head); + head = tmp; + } +} + +int CheckPreprocessorsConfig(SnortConfig *sc) +{ + PreprocCheckConfigFuncNode *idx; + int rval; + + if (sc == NULL) + { + FatalError("%s(%d) Snort config is NULL.\n", + __FILE__, __LINE__); + } + + idx = sc->preproc_config_check_funcs; + + LogMessage("Verifying Preprocessor Configurations!\n"); + + while(idx != NULL) + { + if ((rval = idx->func(sc))) + return rval; + idx = idx->next; + } + return 0; +} + +#ifdef SNORT_RELOAD +int VerifyReloadedPreprocessors(SnortConfig *sc) +{ + int rval; + PreprocessorSwapData *node; + PreprocConfigFuncNode *preproc; + + for (node = sc->preprocSwapData; node != NULL; node = node->next) + { + if (node->data && (preproc = node->preprocNode) && preproc->reload_verify_func && + (rval = preproc->reload_verify_func(sc, node->data))) + { + return rval; + } + } + + return 0; +} + +void FreePreprocessorReloadData(SnortConfig *sc) +{ + PreprocessorSwapData *node; + PreprocConfigFuncNode *preproc; + + while ((node = sc->preprocSwapData)) + { + sc->preprocSwapData = node->next; + if (node->data && (preproc = node->preprocNode) && preproc->reload_swap_free_func) + preproc->reload_swap_free_func(node->data); + free(node); + } +} +#endif + +void DisableAllPolicies(SnortConfig *sc) +{ + if (!sc->disable_all_policies) + { + sc->disable_all_policies = 1; + sc->reenabled_preprocessor_bits = (1 << PP_FRAG3); + sc->reenabled_preprocessor_bits |= (1 << PP_STREAM5); + sc->reenabled_preprocessor_bits |= (1 << PP_PERFMONITOR); + } +} + +int ReenablePreprocBit(SnortConfig *sc, unsigned int preproc_id) +{ + sc->reenabled_preprocessor_bits |= (1 << preproc_id); + return 0; +} + +/***************************** Output Plugin API *****************************/ +extern OutputConfigFuncNode *output_config_funcs; + +static void AppendOutputFuncList(OutputFunc, void *, OutputFuncNode **); + +void RegisterOutputPlugins(void) +{ + LogMessage("Initializing Output Plugins!\n"); + + AlertSyslogSetup(); + LogTcpdumpSetup(); + AlertFastSetup(); + AlertFullSetup(); +#ifndef WIN32 + /* Win32 doesn't support AF_UNIX sockets */ + AlertUnixSockSetup(); +#endif /* !WIN32 */ + AlertCSVSetup(); + LogNullSetup(); + Unified2Setup(); + LogAsciiSetup(); + +#ifdef LINUX + /* This uses linux only capabilities */ + AlertSFSocket_Setup(); +#endif + + AlertTestSetup(); +} + +/**************************************************************************** + * + * Function: RegisterOutputPlugin(char *, void (*func)(Packet *, u_char *)) + * + * Purpose: Associates an output statement with its function. + * + * Arguments: keyword => The output keyword to associate with the + * output processor + * type => alert or log types + * *func => function pointer to the handler + * + * Returns: void function + * + ***************************************************************************/ +void RegisterOutputPlugin(char *keyword, int type_flags, OutputConfigFunc oc_func) +{ + OutputConfigFuncNode *node = (OutputConfigFuncNode *)SnortAlloc(sizeof(OutputConfigFuncNode)); + + DEBUG_WRAP(DebugMessage(DEBUG_PLUGIN,"Registering keyword:output => %s:%p\n", + keyword, oc_func);); + + if (output_config_funcs == NULL) + { + output_config_funcs = node; + } + else + { + OutputConfigFuncNode *tmp = output_config_funcs; + OutputConfigFuncNode *last; + + do + { + if (strcasecmp(tmp->keyword, keyword) == 0) + { + free(node); + FatalError("Duplicate output keyword: %s\n", keyword); + } + + last = tmp; + tmp = tmp->next; + + } while (tmp != NULL); + + last->next = node; + } + + node->keyword = SnortStrdup(keyword); + node->config_func = oc_func; + node->output_type_flags = type_flags; +} + +void RemoveOutputPlugin(char *keyword) +{ + OutputConfigFuncNode *head = output_config_funcs; + + if (!head ||(keyword == NULL)) + return; + + /*If head node, remove head*/ + if (strcasecmp(head->keyword, keyword) == 0) + { + output_config_funcs = head->next; + if (head->keyword != NULL) + free(head->keyword); + free(head); + return; + } + + while (head->next != NULL) + { + OutputConfigFuncNode *next; + next = head->next; + if (strcasecmp(next->keyword, keyword) == 0) + { + head->next = next->next; + if (next->keyword != NULL) + free(next->keyword); + free(next); + break; + } + head = head->next; + } + + return; +} + +OutputConfigFunc GetOutputConfigFunc(char *keyword) +{ + OutputConfigFuncNode *head = output_config_funcs; + + if (keyword == NULL) + return NULL; + + while (head != NULL) + { + if (strcasecmp(head->keyword, keyword) == 0) + return head->config_func; + + head = head->next; + } + + return NULL; +} + +int GetOutputTypeFlags(char *keyword) +{ + OutputConfigFuncNode *head = output_config_funcs; + + if (keyword == NULL) + return 0; + + while (head != NULL) + { + if (strcasecmp(head->keyword, keyword) == 0) + return head->output_type_flags; + + head = head->next; + } + + return 0; +} + +void FreeOutputConfigFuncs(void) +{ + OutputConfigFuncNode *head = output_config_funcs; + OutputConfigFuncNode *tmp; + + while (head != NULL) + { + tmp = head->next; + if (head->keyword != NULL) + free(head->keyword); + free(head); + head = tmp; + } +} + +void FreeOutputList(OutputFuncNode *list) +{ + while (list != NULL) + { + OutputFuncNode *tmp = list; + + list = list->next; + free(tmp); + } +} + +/**************************************************************************** + * + * Function: DumpOutputPlugins() + * + * Purpose: Prints the keyword->preprocess list + * + * Arguments: None. + * + * Returns: void function + * + ***************************************************************************/ +void DumpOutputPlugins(void) +{ + OutputConfigFuncNode *idx = output_config_funcs; + + LogMessage("-------------------------------------------------\n"); + LogMessage(" Keyword | Output @ \n"); + LogMessage("-------------------------------------------------\n"); + while(idx != NULL) + { + LogMessage("%-13s: %p\n", idx->keyword, idx->config_vfunc); + idx = idx->next; + } + LogMessage("-------------------------------------------------\n\n"); +} + +void AddFuncToOutputList(SnortConfig *sc, OutputFunc o_func, OutputType type, void *arg) +{ + switch (type) + { + case OUTPUT_TYPE__ALERT: + if (sc->head_tmp != NULL) + AppendOutputFuncList(o_func, arg, &sc->head_tmp->AlertList); + else + AppendOutputFuncList(o_func, arg, &AlertList); + + break; + + case OUTPUT_TYPE__LOG: + if (sc->head_tmp != NULL) + AppendOutputFuncList(o_func, arg, &sc->head_tmp->LogList); + else + AppendOutputFuncList(o_func, arg, &LogList); + + break; + + default: + /* just to be error-prone */ + FatalError("Unknown output type: %i. Possible bug, please " + "report.\n", type); + } +} + +void AppendOutputFuncList(OutputFunc o_func, void *arg, OutputFuncNode **list) +{ + OutputFuncNode *node; + + if (list == NULL) + return; + + node = (OutputFuncNode *)SnortAlloc(sizeof(OutputFuncNode)); + + if (*list == NULL) + { + *list = node; + } + else + { + OutputFuncNode *tmp = *list; + + while (tmp->next != NULL) + tmp = tmp->next; + + tmp->next = node; + } + + node->func = o_func; + node->arg = arg; +} + + +/************************** Miscellaneous Functions **************************/ + +/* functions to aid in cleaning up after plugins + * Used for both rule options and output. Preprocessors have their own */ +static inline void _AddFuncToPostConfigList(PostConfigFunc pl_post_func, void *arg, PostConfigFuncNode **list) +{ + PostConfigFuncNode *node; + + node = (PostConfigFuncNode *)SnortAlloc(sizeof(PostConfigFuncNode)); + + if (*list == NULL) + { + *list = node; + } + else + { + PostConfigFuncNode *tmp = *list; + + while (tmp->next != NULL) + tmp = tmp->next; + + tmp->next = node; + } + + node->func = pl_post_func; + node->arg = arg; +} + +#ifdef SNORT_RELOAD +void AddFuncToReloadList(PostConfigFunc pl_post_func, void *arg) +{ + _AddFuncToPostConfigList(pl_post_func, arg, &plugin_reload_funcs); +} +#endif + +void AddFuncToCleanExitList(PluginSignalFunc pl_sig_func, void *arg) +{ + AddFuncToSignalList(pl_sig_func, arg, &plugin_clean_exit_funcs); +} + +void AddFuncToShutdownList(PluginSignalFunc pl_sig_func, void *arg) +{ + AddFuncToSignalList(pl_sig_func, arg, &plugin_shutdown_funcs); +} + +void AddFuncToPostConfigList(SnortConfig *sc, PostConfigFunc pl_post_func, void *arg) +{ + _AddFuncToPostConfigList(pl_post_func, arg, &sc->plugin_post_config_funcs); +} + +void AddFuncToSignalList(PluginSignalFunc pl_sig_func, void *arg, PluginSignalFuncNode **list) +{ + PluginSignalFuncNode *node; + + if (list == NULL) + return; + + node = (PluginSignalFuncNode *)SnortAlloc(sizeof(PluginSignalFuncNode)); + + if (*list == NULL) + { + *list = node; + } + else + { + PluginSignalFuncNode *tmp = *list; + + while (tmp->next != NULL) + tmp = tmp->next; + + tmp->next = node; + } + + node->func = pl_sig_func; + node->arg = arg; +} + +void AddFuncToRuleOptParseCleanupList(RuleOptParseCleanupFunc ro_parse_clean_func) +{ + RuleOptParseCleanupNode *node = + (RuleOptParseCleanupNode *)SnortAlloc(sizeof(RuleOptParseCleanupNode)); + + if (rule_opt_parse_cleanup_list == NULL) + { + rule_opt_parse_cleanup_list = node; + } + else + { + RuleOptParseCleanupNode *tmp = rule_opt_parse_cleanup_list; + + while (tmp->next != NULL) + tmp = tmp->next; + + tmp->next = node; + } + + node->func = ro_parse_clean_func; +} + +void RuleOptParseCleanup(void) +{ + RuleOptParseCleanupNode *list = rule_opt_parse_cleanup_list; + + for (; list != NULL; list = list->next) + { + if (list->func != NULL) + list->func(); + } +} + +void FreeRuleOptParseCleanupList(RuleOptParseCleanupNode *head) +{ + while (head != NULL) + { + RuleOptParseCleanupNode *tmp = head; + + head = head->next; + free(tmp); + } +} + + diff -uNr snort-2.9.5.orig/src/plugin_enum.h snort-2.9.5/src/plugin_enum.h --- snort-2.9.5.orig/src/plugin_enum.h 2013-02-19 23:14:22.000000000 +0100 +++ snort-2.9.5/src/plugin_enum.h 2013-07-08 22:58:33.186668664 +0200 @@ -60,6 +60,7 @@ PLUGIN_URILEN_CHECK, PLUGIN_DYNAMIC, PLUGIN_FLOWBIT, + PLUGIN_FWSAM, PLUGIN_FILE_DATA, PLUGIN_BASE64_DECODE, PLUGIN_MAX /* sentinel value */ diff -uNr snort-2.9.5.orig/src/twofish.c snort-2.9.5/src/twofish.c --- snort-2.9.5.orig/src/twofish.c 1970-01-01 01:00:00.000000000 +0100 +++ snort-2.9.5/src/twofish.c 2013-07-08 22:58:33.186668664 +0200 @@ -0,0 +1,971 @@ +/* $Id: twofish.c,v 2.1 2008/12/15 20:36:05 fknobbe Exp $ + * + * + * Copyright (C) 1997-2000 The Cryptix Foundation Limited. + * Copyright (C) 2000 Farm9. + * Copyright (C) 2001 Frank Knobbe. + * All rights reserved. + * + * For Cryptix code: + * Use, modification, copying and distribution of this software is subject + * the terms and conditions of the Cryptix General Licence. You should have + * received a copy of the Cryptix General Licence along with this library; + * if not, you can download a copy from http://www.cryptix.org/ . + * + * For Farm9: + * --- jojo@farm9.com, August 2000, converted from Java to C++, added CBC mode and + * ciphertext stealing technique, added AsciiTwofish class for easy encryption + * decryption of text strings + * + * Frank Knobbe <frank@knobbe.us>: + * --- April 2001, converted from C++ to C, prefixed global variables + * with TwoFish, substituted some defines, changed functions to make use of + * variables supplied in a struct, modified and added routines for modular calls. + * Cleaned up the code so that defines are used instead of fixed 16's and 32's. + * Created two general purpose crypt routines for one block and multiple block + * encryption using Joh's CBC code. + * Added crypt routines that use a header (with a magic and data length). + * (Basically a major rewrite). + * + * Note: Routines labeled _TwoFish are private and should not be used + * (or with extreme caution). + * + */ + +#ifndef __TWOFISH_LIBRARY_SOURCE__ +#define __TWOFISH_LIBRARY_SOURCE__ + +#include <string.h> +#include <stdlib.h> +#include <time.h> +#include <ctype.h> +#include <sys/types.h> + +#ifdef WIN32 + +#ifndef u_long +typedef unsigned long u_long; +#endif +#ifndef u_int32_t +typedef unsigned long u_int32_t; +#endif +#ifndef u_word +typedef unsigned short u_word; +#endif +#ifndef u_int16_t +typedef unsigned short u_int16_t; +#endif +#ifndef u_char +typedef unsigned char u_char; +#endif +#ifndef u_int8_t +typedef unsigned char u_int8_t; +#endif + +#endif /* WIN32 */ + +#include "twofish.h" + + +bool TwoFish_srand=TRUE; /* if TRUE, first call of TwoFishInit will seed rand(); */ + /* of TwoFishInit */ + +/* Fixed 8x8 permutation S-boxes */ +static const u_int8_t TwoFish_P[2][256] = +{ + { /* p0 */ + 0xA9, 0x67, 0xB3, 0xE8, 0x04, 0xFD, 0xA3, 0x76, 0x9A, 0x92, 0x80, 0x78, + 0xE4, 0xDD, 0xD1, 0x38, 0x0D, 0xC6, 0x35, 0x98, 0x18, 0xF7, 0xEC, 0x6C, + 0x43, 0x75, 0x37, 0x26, 0xFA, 0x13, 0x94, 0x48, 0xF2, 0xD0, 0x8B, 0x30, + 0x84, 0x54, 0xDF, 0x23, 0x19, 0x5B, 0x3D, 0x59, 0xF3, 0xAE, 0xA2, 0x82, + 0x63, 0x01, 0x83, 0x2E, 0xD9, 0x51, 0x9B, 0x7C, 0xA6, 0xEB, 0xA5, 0xBE, + 0x16, 0x0C, 0xE3, 0x61, 0xC0, 0x8C, 0x3A, 0xF5, 0x73, 0x2C, 0x25, 0x0B, + 0xBB, 0x4E, 0x89, 0x6B, 0x53, 0x6A, 0xB4, 0xF1, 0xE1, 0xE6, 0xBD, 0x45, + 0xE2, 0xF4, 0xB6, 0x66, 0xCC, 0x95, 0x03, 0x56, 0xD4, 0x1C, 0x1E, 0xD7, + 0xFB, 0xC3, 0x8E, 0xB5, 0xE9, 0xCF, 0xBF, 0xBA, 0xEA, 0x77, 0x39, 0xAF, + 0x33, 0xC9, 0x62, 0x71, 0x81, 0x79, 0x09, 0xAD, 0x24, 0xCD, 0xF9, 0xD8, + 0xE5, 0xC5, 0xB9, 0x4D, 0x44, 0x08, 0x86, 0xE7, 0xA1, 0x1D, 0xAA, 0xED, + 0x06, 0x70, 0xB2, 0xD2, 0x41, 0x7B, 0xA0, 0x11, 0x31, 0xC2, 0x27, 0x90, + 0x20, 0xF6, 0x60, 0xFF, 0x96, 0x5C, 0xB1, 0xAB, 0x9E, 0x9C, 0x52, 0x1B, + 0x5F, 0x93, 0x0A, 0xEF, 0x91, 0x85, 0x49, 0xEE, 0x2D, 0x4F, 0x8F, 0x3B, + 0x47, 0x87, 0x6D, 0x46, 0xD6, 0x3E, 0x69, 0x64, 0x2A, 0xCE, 0xCB, 0x2F, + 0xFC, 0x97, 0x05, 0x7A, 0xAC, 0x7F, 0xD5, 0x1A, 0x4B, 0x0E, 0xA7, 0x5A, + 0x28, 0x14, 0x3F, 0x29, 0x88, 0x3C, 0x4C, 0x02, 0xB8, 0xDA, 0xB0, 0x17, + 0x55, 0x1F, 0x8A, 0x7D, 0x57, 0xC7, 0x8D, 0x74, 0xB7, 0xC4, 0x9F, 0x72, + 0x7E, 0x15, 0x22, 0x12, 0x58, 0x07, 0x99, 0x34, 0x6E, 0x50, 0xDE, 0x68, + 0x65, 0xBC, 0xDB, 0xF8, 0xC8, 0xA8, 0x2B, 0x40, 0xDC, 0xFE, 0x32, 0xA4, + 0xCA, 0x10, 0x21, 0xF0, 0xD3, 0x5D, 0x0F, 0x00, 0x6F, 0x9D, 0x36, 0x42, + 0x4A, 0x5E, 0xC1, 0xE0 + }, + { /* p1 */ + 0x75, 0xF3, 0xC6, 0xF4, 0xDB, 0x7B, 0xFB, 0xC8, 0x4A, 0xD3, 0xE6, 0x6B, + 0x45, 0x7D, 0xE8, 0x4B, 0xD6, 0x32, 0xD8, 0xFD, 0x37, 0x71, 0xF1, 0xE1, + 0x30, 0x0F, 0xF8, 0x1B, 0x87, 0xFA, 0x06, 0x3F, 0x5E, 0xBA, 0xAE, 0x5B, + 0x8A, 0x00, 0xBC, 0x9D, 0x6D, 0xC1, 0xB1, 0x0E, 0x80, 0x5D, 0xD2, 0xD5, + 0xA0, 0x84, 0x07, 0x14, 0xB5, 0x90, 0x2C, 0xA3, 0xB2, 0x73, 0x4C, 0x54, + 0x92, 0x74, 0x36, 0x51, 0x38, 0xB0, 0xBD, 0x5A, 0xFC, 0x60, 0x62, 0x96, + 0x6C, 0x42, 0xF7, 0x10, 0x7C, 0x28, 0x27, 0x8C, 0x13, 0x95, 0x9C, 0xC7, + 0x24, 0x46, 0x3B, 0x70, 0xCA, 0xE3, 0x85, 0xCB, 0x11, 0xD0, 0x93, 0xB8, + 0xA6, 0x83, 0x20, 0xFF, 0x9F, 0x77, 0xC3, 0xCC, 0x03, 0x6F, 0x08, 0xBF, + 0x40, 0xE7, 0x2B, 0xE2, 0x79, 0x0C, 0xAA, 0x82, 0x41, 0x3A, 0xEA, 0xB9, + 0xE4, 0x9A, 0xA4, 0x97, 0x7E, 0xDA, 0x7A, 0x17, 0x66, 0x94, 0xA1, 0x1D, + 0x3D, 0xF0, 0xDE, 0xB3, 0x0B, 0x72, 0xA7, 0x1C, 0xEF, 0xD1, 0x53, 0x3E, + 0x8F, 0x33, 0x26, 0x5F, 0xEC, 0x76, 0x2A, 0x49, 0x81, 0x88, 0xEE, 0x21, + 0xC4, 0x1A, 0xEB, 0xD9, 0xC5, 0x39, 0x99, 0xCD, 0xAD, 0x31, 0x8B, 0x01, + 0x18, 0x23, 0xDD, 0x1F, 0x4E, 0x2D, 0xF9, 0x48, 0x4F, 0xF2, 0x65, 0x8E, + 0x78, 0x5C, 0x58, 0x19, 0x8D, 0xE5, 0x98, 0x57, 0x67, 0x7F, 0x05, 0x64, + 0xAF, 0x63, 0xB6, 0xFE, 0xF5, 0xB7, 0x3C, 0xA5, 0xCE, 0xE9, 0x68, 0x44, + 0xE0, 0x4D, 0x43, 0x69, 0x29, 0x2E, 0xAC, 0x15, 0x59, 0xA8, 0x0A, 0x9E, + 0x6E, 0x47, 0xDF, 0x34, 0x35, 0x6A, 0xCF, 0xDC, 0x22, 0xC9, 0xC0, 0x9B, + 0x89, 0xD4, 0xED, 0xAB, 0x12, 0xA2, 0x0D, 0x52, 0xBB, 0x02, 0x2F, 0xA9, + 0xD7, 0x61, 0x1E, 0xB4, 0x50, 0x04, 0xF6, 0xC2, 0x16, 0x25, 0x86, 0x56, + 0x55, 0x09, 0xBE, 0x91 + } +}; + +static bool TwoFish_MDSready=FALSE; +static u_int32_t TwoFish_MDS[4][256]; /* TwoFish_MDS matrix */ + + +#define TwoFish_LFSR1(x) (((x)>>1)^(((x)&0x01)?TwoFish_MDS_GF_FDBK/2:0)) +#define TwoFish_LFSR2(x) (((x)>>2)^(((x)&0x02)?TwoFish_MDS_GF_FDBK/2:0)^(((x)&0x01)?TwoFish_MDS_GF_FDBK/4:0)) + +#define TwoFish_Mx_1(x) ((u_int32_t)(x)) /* force result to dword so << will work */ +#define TwoFish_Mx_X(x) ((u_int32_t)((x)^TwoFish_LFSR2(x))) /* 5B */ +#define TwoFish_Mx_Y(x) ((u_int32_t)((x)^TwoFish_LFSR1(x)^TwoFish_LFSR2(x))) /* EF */ +#define TwoFish_RS_rem(x) { u_int8_t b=(u_int8_t)(x>>24); u_int32_t g2=((b<<1)^((b&0x80)?TwoFish_RS_GF_FDBK:0))&0xFF; u_int32_t g3=((b>>1)&0x7F)^((b&1)?TwoFish_RS_GF_FDBK>>1:0)^g2; x=(x<<8)^(g3<<24)^(g2<<16)^(g3<<8)^b; } + +/*#define TwoFish__b(x,N) (((u_int8_t *)&x)[((N)&3)^TwoFish_ADDR_XOR])*/ /* pick bytes out of a dword */ + +#define TwoFish_b0(x) TwoFish__b(x,0) /* extract LSB of u_int32_t */ +#define TwoFish_b1(x) TwoFish__b(x,1) +#define TwoFish_b2(x) TwoFish__b(x,2) +#define TwoFish_b3(x) TwoFish__b(x,3) /* extract MSB of u_int32_t */ + +u_int8_t TwoFish__b(u_int32_t x,int n) +{ n&=3; + while(n-->0) + x>>=8; + return (u_int8_t)x; +} + + +/* TwoFish Initialization + * + * This routine generates a global data structure for use with TwoFish, + * initializes important values (such as subkeys, sBoxes), generates subkeys + * and precomputes the MDS matrix if not already done. + * + * Input: User supplied password (will be appended by default password of 'SnortHas2FishEncryptionRoutines!') + * + * Output: Pointer to TWOFISH structure. This data structure contains key dependent data. + * This pointer is used with all other crypt functions. + */ + +TWOFISH *TwoFishInit(char *userkey) +{ TWOFISH *tfdata; + int i,x,m; + char tkey[TwoFish_KEY_LENGTH+40]; + + tfdata=malloc(sizeof(TWOFISH)); /* allocate the TwoFish structure */ + if(tfdata!=NULL) + { if(*userkey) + { strncpy(tkey,userkey,TwoFish_KEY_LENGTH); /* use first 32 chars of user supplied password */ + tkey[TwoFish_KEY_LENGTH]=0; /* make sure it wasn't more */ + } + else + strcpy(tkey,TwoFish_DEFAULT_PW); /* if no key defined, use default password */ + for(i=0,x=0,m=strlen(tkey);i<TwoFish_KEY_LENGTH;i++) /* copy into data structure */ + { tfdata->key[i]=tkey[x++]; /* fill the whole keyspace with repeating key. */ + if(x==m) + x=0; + } + + if(!TwoFish_MDSready) + _TwoFish_PrecomputeMDSmatrix(); /* "Wake Up, Neo" */ + _TwoFish_MakeSubKeys(tfdata); /* generate subkeys */ + _TwoFish_ResetCBC(tfdata); /* reset the CBC */ + tfdata->output=NULL; /* nothing to output yet */ + tfdata->dontflush=FALSE; /* reset decrypt skip block flag */ + if(TwoFish_srand) + { TwoFish_srand=FALSE; + srand(time(NULL)); + } + } + return tfdata; /* return the data pointer */ +} + + +void TwoFishDestroy(TWOFISH *tfdata) +{ if(tfdata!=NULL) + free(tfdata); +} + + +/* en/decryption with CBC mode */ +unsigned long _TwoFish_CryptRawCBC(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata) +{ unsigned long rl; + + rl=len; /* remember how much data to crypt. */ + while(len>TwoFish_BLOCK_SIZE) /* and now we process block by block. */ + { _TwoFish_BlockCrypt(in,out,TwoFish_BLOCK_SIZE,decrypt,tfdata); /* de/encrypt it. */ + in+=TwoFish_BLOCK_SIZE; /* adjust pointers. */ + out+=TwoFish_BLOCK_SIZE; + len-=TwoFish_BLOCK_SIZE; + } + if(len>0) /* if we have less than a block left... */ + _TwoFish_BlockCrypt(in,out,len,decrypt,tfdata); /* ...then we de/encrypt that too. */ + if(tfdata->qBlockDefined && !tfdata->dontflush) /* in case len was exactly one block... */ + _TwoFish_FlushOutput(tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE,tfdata); /* ...we need to write the... */ + /* ...remaining bytes of the buffer */ + return rl; +} + +/* en/decryption on one block only */ +unsigned long _TwoFish_CryptRaw16(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata) +{ /* qBlockPlain already zero'ed through ResetCBC */ + memcpy(tfdata->qBlockPlain,in,len); /* toss the data into it. */ + _TwoFish_BlockCrypt16(tfdata->qBlockPlain,tfdata->qBlockCrypt,decrypt,tfdata); /* encrypt just that block without CBC. */ + memcpy(out,tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE); /* and return what we got */ + return TwoFish_BLOCK_SIZE; +} + +/* en/decryption without reset of CBC and output assignment */ +unsigned long _TwoFish_CryptRaw(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata) +{ + if(in!=NULL && out!=NULL && len>0 && tfdata!=NULL) /* if we have valid data, then... */ + { if(len>TwoFish_BLOCK_SIZE) /* ...check if we have more than one block. */ + return _TwoFish_CryptRawCBC(in,out,len,decrypt,tfdata); /* if so, use the CBC routines... */ + else + return _TwoFish_CryptRaw16(in,out,len,decrypt,tfdata); /* ...otherwise just do one block. */ + } + return 0; +} + + +/* TwoFish Raw Encryption + * + * Does not use header, but does use CBC (if more than one block has to be encrypted). + * + * Input: Pointer to the buffer of the plaintext to be encrypted. + * Pointer to the buffer receiving the ciphertext. + * The length of the plaintext buffer. + * The TwoFish structure. + * + * Output: The amount of bytes encrypted if successful, otherwise 0. + */ + +unsigned long TwoFishEncryptRaw(char *in, + char *out, + unsigned long len, + TWOFISH *tfdata) +{ _TwoFish_ResetCBC(tfdata); /* reset CBC flag. */ + tfdata->output=out; /* output straight into output buffer. */ + return _TwoFish_CryptRaw(in,out,len,FALSE,tfdata); /* and go for it. */ +} + +/* TwoFish Raw Decryption + * + * Does not use header, but does use CBC (if more than one block has to be decrypted). + * + * Input: Pointer to the buffer of the ciphertext to be decrypted. + * Pointer to the buffer receiving the plaintext. + * The length of the ciphertext buffer (at least one cipher block). + * The TwoFish structure. + * + * Output: The amount of bytes decrypted if successful, otherwise 0. + */ + +unsigned long TwoFishDecryptRaw(char *in, + char *out, + unsigned long len, + TWOFISH *tfdata) +{ _TwoFish_ResetCBC(tfdata); /* reset CBC flag. */ + tfdata->output=out; /* output straight into output buffer. */ + return _TwoFish_CryptRaw(in,out,len,TRUE,tfdata); /* and go for it. */ +} + +/* TwoFish Free + * + * Free's the allocated buffer. + * + * Input: Pointer to the TwoFish structure + * + * Output: (none) + */ + +void TwoFishFree(TWOFISH *tfdata) +{ if(tfdata->output!=NULL) /* if a valid buffer is present... */ + { free(tfdata->output); /* ...then we free it for you... */ + tfdata->output=NULL; /* ...and mark as such. */ + } +} + +/* TwoFish Set Output + * + * If you want to allocate the output buffer yourself, + * then you can set it with this function. + * + * Input: Pointer to your output buffer + * Pointer to the TwoFish structure + * + * Output: (none) + */ + +void TwoFishSetOutput(char *outp,TWOFISH *tfdata) +{ tfdata->output=outp; /* (do we really need a function for this?) */ +} + +/* TwoFish Alloc + * + * Allocates enough memory for the output buffer that would be required + * + * Input: Length of the plaintext. + * Boolean flag for BinHex Output. + * Pointer to the TwoFish structure. + * + * Output: Returns a pointer to the memory allocated. + */ + +void *TwoFishAlloc(unsigned long len,bool binhex,bool decrypt,TWOFISH *tfdata) +{ +/* TwoFishFree(tfdata); */ /* (don't for now) discard whatever was allocated earlier. */ + if(decrypt) /* if decrypting... */ + { if(binhex) /* ...and input is binhex encoded... */ + len/=2; /* ...use half as much for output. */ + len-=TwoFish_BLOCK_SIZE; /* Also, subtract the size of the header. */ + } + else + { len+=TwoFish_BLOCK_SIZE; /* the size is just increased by the header... */ + if(binhex) + len*=2; /* ...and doubled if output is to be binhexed. */ + } + tfdata->output=malloc(len+TwoFish_BLOCK_SIZE);/* grab some memory...plus some extra (it's running over somewhere, crashes without extra padding) */ + + return tfdata->output; /* ...and return to caller. */ +} + +/* bin2hex and hex2bin conversion */ +void _TwoFish_BinHex(u_int8_t *buf,unsigned long len,bool bintohex) +{ u_int8_t *pi,*po,c; + + if(bintohex) + { for(pi=buf+len-1,po=buf+(2*len)-1;len>0;pi--,po--,len--) /* let's start from the end of the bin block. */ + { c=*pi; /* grab value. */ + c&=15; /* use lower 4 bits. */ + if(c>9) /* convert to ascii. */ + c+=('a'-10); + else + c+='0'; + *po--=c; /* set the lower nibble. */ + c=*pi; /* grab value again. */ + c>>=4; /* right shift 4 bits. */ + c&=15; /* make sure we only have 4 bits. */ + if(c>9) /* convert to ascii. */ + c+=('a'-10); + else + c+='0'; + *po=c; /* set the higher nibble. */ + } /* and keep going. */ + } + else + { for(pi=buf,po=buf;len>0;pi++,po++,len-=2) /* let's start from the beginning of the hex block. */ + { c=tolower(*pi++)-'0'; /* grab higher nibble. */ + if(c>9) /* convert to value. */ + c-=('0'-9); + *po=c<<4; /* left shit 4 bits. */ + c=tolower(*pi)-'0'; /* grab lower nibble. */ + if(c>9) /* convert to value. */ + c-=('0'-9); + *po|=c; /* and add to value. */ + } + } +} + + +/* TwoFish Encryption + * + * Uses header and CBC. If the output area has not been intialized with TwoFishAlloc, + * this routine will alloc the memory. In addition, it will include a small 'header' + * containing the magic and some salt. That way the decrypt routine can check if the + * packet got decrypted successfully, and return 0 instead of garbage. + * + * Input: Pointer to the buffer of the plaintext to be encrypted. + * Pointer to the pointer to the buffer receiving the ciphertext. + * The pointer either points to user allocated output buffer space, or to NULL, in which case + * this routine will set the pointer to the buffer allocated through the struct. + * The length of the plaintext buffer. + * Can be -1 if the input is a null terminated string, in which case we'll count for you. + * Boolean flag for BinHex Output (if used, output will be twice as large as input). + * Note: BinHex conversion overwrites (converts) input buffer! + * The TwoFish structure. + * + * Output: The amount of bytes encrypted if successful, otherwise 0. + */ + +unsigned long TwoFishEncrypt(char *in, + char **out, + signed long len, + bool binhex, + TWOFISH *tfdata) +{ unsigned long ilen,olen; + + + if(len== -1) /* if we got -1 for len, we'll assume IN is a... */ + ilen=strlen(in); /* ...\0 terminated string and figure len out ourselves... */ + else + ilen=len; /* ...otherwise we trust you supply a correct length. */ + + if(in!=NULL && out!=NULL && ilen>0 && tfdata!=NULL) /* if we got usable stuff, we'll do it. */ + { if(*out==NULL) /* if OUT points to a NULL pointer... */ + *out=TwoFishAlloc(ilen,binhex,FALSE,tfdata); /* ...we'll (re-)allocate buffer space. */ + if(*out!=NULL) + { tfdata->output=*out; /* set output buffer. */ + tfdata->header.salt=rand()*65536+rand(); /* toss in some salt. */ + tfdata->header.length[0]= (u_int8_t)(ilen); + tfdata->header.length[1]= (u_int8_t)(ilen>>8); + tfdata->header.length[2]= (u_int8_t)(ilen>>16); + tfdata->header.length[3]= (u_int8_t)(ilen>>24); + memcpy(tfdata->header.magic,TwoFish_MAGIC,TwoFish_MAGIC_LEN); /* set the magic. */ + olen=TwoFish_BLOCK_SIZE; /* set output counter. */ + _TwoFish_ResetCBC(tfdata); /* reset the CBC flag */ + _TwoFish_BlockCrypt((u_int8_t *)&(tfdata->header),*out,olen,FALSE,tfdata); /* encrypt first block (without flush on 16 byte boundary). */ + olen+=_TwoFish_CryptRawCBC(in,*out+TwoFish_BLOCK_SIZE,ilen,FALSE,tfdata); /* and encrypt the rest (we do not reset the CBC flag). */ + if(binhex) /* if binhex... */ + { _TwoFish_BinHex(*out,olen,TRUE); /* ...convert output to binhex... */ + olen*=2; /* ...and size twice as large. */ + } + tfdata->output=*out; + return olen; + } + } + return 0; +} + +/* TwoFish Decryption + * + * Uses header and CBC. If the output area has not been intialized with TwoFishAlloc, + * this routine will alloc the memory. In addition, it will check the small 'header' + * containing the magic. If magic does not match we return 0. Otherwise we return the + * amount of bytes decrypted (should be the same as the length in the header). + * + * Input: Pointer to the buffer of the ciphertext to be decrypted. + * Pointer to the pointer to the buffer receiving the plaintext. + * The pointer either points to user allocated output buffer space, or to NULL, in which case + * this routine will set the pointer to the buffer allocated through the struct. + * The length of the ciphertext buffer. + * Can be -1 if the input is a null terminated binhex string, in which case we'll count for you. + * Boolean flag for BinHex Input (if used, plaintext will be half as large as input). + * Note: BinHex conversion overwrites (converts) input buffer! + * The TwoFish structure. + * + * Output: The amount of bytes decrypted if successful, otherwise 0. + */ + +unsigned long TwoFishDecrypt(char *in, + char **out, + signed long len, + bool binhex, + TWOFISH *tfdata) +{ unsigned long ilen,elen,olen; + const u_int8_t cmagic[TwoFish_MAGIC_LEN]=TwoFish_MAGIC; + u_int8_t *tbuf; + + + + if(len== -1) /* if we got -1 for len, we'll assume IN is... */ + ilen=strlen(in); /* ...\0 terminated binhex and figure len out ourselves... */ + else + ilen=len; /* ...otherwise we trust you supply a correct length. */ + + if(in!=NULL && out!=NULL && ilen>0 && tfdata!=NULL) /* if we got usable stuff, we'll do it. */ + { if(*out==NULL) /* if OUT points to a NULL pointer... */ + *out=TwoFishAlloc(ilen,binhex,TRUE,tfdata); /* ...we'll (re-)allocate buffer space. */ + if(*out!=NULL) + { if(binhex) /* if binhex... */ + { _TwoFish_BinHex(in,ilen,FALSE); /* ...convert input to values... */ + ilen/=2; /* ...and size half as much. */ + } + _TwoFish_ResetCBC(tfdata); /* reset the CBC flag. */ + + tbuf=(u_int8_t *)malloc(ilen+TwoFish_BLOCK_SIZE); /* get memory for data and header. */ + if(tbuf==NULL) + return 0; + tfdata->output=tbuf; /* set output to temp buffer. */ + + olen=_TwoFish_CryptRawCBC(in,tbuf,ilen,TRUE,tfdata)-TwoFish_BLOCK_SIZE; /* decrypt the whole thing. */ + memcpy(&(tfdata->header),tbuf,TwoFish_BLOCK_SIZE); /* copy first block into header. */ + tfdata->output=*out; + for(elen=0;elen<TwoFish_MAGIC_LEN;elen++) /* compare magic. */ + if(tfdata->header.magic[elen]!=cmagic[elen]) + break; + if(elen==TwoFish_MAGIC_LEN) /* if magic matches then... */ + { elen=(tfdata->header.length[0]) | + (tfdata->header.length[1])<<8 | + (tfdata->header.length[2])<<16 | + (tfdata->header.length[3])<<24; /* .. we know how much to expect. */ + if(elen>olen) /* adjust if necessary. */ + elen=olen; + memcpy(*out,tbuf+TwoFish_BLOCK_SIZE,elen); /* copy data into intended output. */ + free(tbuf); + return elen; + } + free(tbuf); + } + } + return 0; +} + +void _TwoFish_PrecomputeMDSmatrix(void) /* precompute the TwoFish_MDS matrix */ +{ u_int32_t m1[2]; + u_int32_t mX[2]; + u_int32_t mY[2]; + u_int32_t i, j; + + for (i = 0; i < 256; i++) + { j = TwoFish_P[0][i] & 0xFF; /* compute all the matrix elements */ + m1[0] = j; + mX[0] = TwoFish_Mx_X( j ) & 0xFF; + mY[0] = TwoFish_Mx_Y( j ) & 0xFF; + + j = TwoFish_P[1][i] & 0xFF; + m1[1] = j; + mX[1] = TwoFish_Mx_X( j ) & 0xFF; + mY[1] = TwoFish_Mx_Y( j ) & 0xFF; + + TwoFish_MDS[0][i] = m1[TwoFish_P_00] | /* fill matrix w/ above elements */ + mX[TwoFish_P_00] << 8 | + mY[TwoFish_P_00] << 16 | + mY[TwoFish_P_00] << 24; + TwoFish_MDS[1][i] = mY[TwoFish_P_10] | + mY[TwoFish_P_10] << 8 | + mX[TwoFish_P_10] << 16 | + m1[TwoFish_P_10] << 24; + TwoFish_MDS[2][i] = mX[TwoFish_P_20] | + mY[TwoFish_P_20] << 8 | + m1[TwoFish_P_20] << 16 | + mY[TwoFish_P_20] << 24; + TwoFish_MDS[3][i] = mX[TwoFish_P_30] | + m1[TwoFish_P_30] << 8 | + mY[TwoFish_P_30] << 16 | + mX[TwoFish_P_30] << 24; + } + TwoFish_MDSready=TRUE; +} + + +void _TwoFish_MakeSubKeys(TWOFISH *tfdata) /* Expand a user-supplied key material into a session key. */ +{ u_int32_t k64Cnt = TwoFish_KEY_LENGTH / 8; + u_int32_t k32e[4]; /* even 32-bit entities */ + u_int32_t k32o[4]; /* odd 32-bit entities */ + u_int32_t sBoxKey[4]; + u_int32_t offset,i,j; + u_int32_t A, B, q=0; + u_int32_t k0,k1,k2,k3; + u_int32_t b0,b1,b2,b3; + + /* split user key material into even and odd 32-bit entities and */ + /* compute S-box keys using (12, 8) Reed-Solomon code over GF(256) */ + + + for (offset=0,i=0,j=k64Cnt-1;i<4 && offset<TwoFish_KEY_LENGTH;i++,j--) + { k32e[i] = tfdata->key[offset++]; + k32e[i]|= tfdata->key[offset++]<<8; + k32e[i]|= tfdata->key[offset++]<<16; + k32e[i]|= tfdata->key[offset++]<<24; + k32o[i] = tfdata->key[offset++]; + k32o[i]|= tfdata->key[offset++]<<8; + k32o[i]|= tfdata->key[offset++]<<16; + k32o[i]|= tfdata->key[offset++]<<24; + sBoxKey[j] = _TwoFish_RS_MDS_Encode( k32e[i], k32o[i] ); /* reverse order */ + } + + /* compute the round decryption subkeys for PHT. these same subkeys */ + /* will be used in encryption but will be applied in reverse order. */ + i=0; + while(i < TwoFish_TOTAL_SUBKEYS) + { A = _TwoFish_F32( k64Cnt, q, k32e ); /* A uses even key entities */ + q += TwoFish_SK_BUMP; + + B = _TwoFish_F32( k64Cnt, q, k32o ); /* B uses odd key entities */ + q += TwoFish_SK_BUMP; + + B = B << 8 | B >> 24; + + A += B; + tfdata->subKeys[i++] = A; /* combine with a PHT */ + + A += B; + tfdata->subKeys[i++] = A << TwoFish_SK_ROTL | A >> (32-TwoFish_SK_ROTL); + } + + /* fully expand the table for speed */ + k0 = sBoxKey[0]; + k1 = sBoxKey[1]; + k2 = sBoxKey[2]; + k3 = sBoxKey[3]; + + for (i = 0; i < 256; i++) + { b0 = b1 = b2 = b3 = i; + switch (k64Cnt & 3) + { case 1: /* 64-bit keys */ + tfdata->sBox[ 2*i ] = TwoFish_MDS[0][(TwoFish_P[TwoFish_P_01][b0]) ^ TwoFish_b0(k0)]; + tfdata->sBox[ 2*i+1] = TwoFish_MDS[1][(TwoFish_P[TwoFish_P_11][b1]) ^ TwoFish_b1(k0)]; + tfdata->sBox[0x200+2*i ] = TwoFish_MDS[2][(TwoFish_P[TwoFish_P_21][b2]) ^ TwoFish_b2(k0)]; + tfdata->sBox[0x200+2*i+1] = TwoFish_MDS[3][(TwoFish_P[TwoFish_P_31][b3]) ^ TwoFish_b3(k0)]; + break; + case 0: /* 256-bit keys (same as 4) */ + b0 = (TwoFish_P[TwoFish_P_04][b0]) ^ TwoFish_b0(k3); + b1 = (TwoFish_P[TwoFish_P_14][b1]) ^ TwoFish_b1(k3); + b2 = (TwoFish_P[TwoFish_P_24][b2]) ^ TwoFish_b2(k3); + b3 = (TwoFish_P[TwoFish_P_34][b3]) ^ TwoFish_b3(k3); + case 3: /* 192-bit keys */ + b0 = (TwoFish_P[TwoFish_P_03][b0]) ^ TwoFish_b0(k2); + b1 = (TwoFish_P[TwoFish_P_13][b1]) ^ TwoFish_b1(k2); + b2 = (TwoFish_P[TwoFish_P_23][b2]) ^ TwoFish_b2(k2); + b3 = (TwoFish_P[TwoFish_P_33][b3]) ^ TwoFish_b3(k2); + case 2: /* 128-bit keys */ + tfdata->sBox[ 2*i ]= + TwoFish_MDS[0][(TwoFish_P[TwoFish_P_01][(TwoFish_P[TwoFish_P_02][b0]) ^ + TwoFish_b0(k1)]) ^ TwoFish_b0(k0)]; + + tfdata->sBox[ 2*i+1]= + TwoFish_MDS[1][(TwoFish_P[TwoFish_P_11][(TwoFish_P[TwoFish_P_12][b1]) ^ + TwoFish_b1(k1)]) ^ TwoFish_b1(k0)]; + + tfdata->sBox[0x200+2*i ]= + TwoFish_MDS[2][(TwoFish_P[TwoFish_P_21][(TwoFish_P[TwoFish_P_22][b2]) ^ + TwoFish_b2(k1)]) ^ TwoFish_b2(k0)]; + + tfdata->sBox[0x200+2*i+1]= + TwoFish_MDS[3][(TwoFish_P[TwoFish_P_31][(TwoFish_P[TwoFish_P_32][b3]) ^ + TwoFish_b3(k1)]) ^ TwoFish_b3(k0)]; + } + } +} + + +/** + * Encrypt or decrypt exactly one block of plaintext in CBC mode. + * Use "ciphertext stealing" technique described on pg. 196 + * of "Applied Cryptography" to encrypt the final partial + * (i.e. <16 byte) block if necessary. + * + * jojo: the "ciphertext stealing" requires we read ahead and have + * special handling for the last two blocks. Because of this, the + * output from the TwoFish algorithm is handled internally here. + * It would be better to have a higher level handle this as well as + * CBC mode. Unfortunately, I've mixed the two together, which is + * pretty crappy... The Java version separates these out correctly. + * + * fknobbe: I have reduced the CBC mode to work on memory buffer only. + * Higher routines should use an intermediate buffer and handle + * their output seperately (mainly so the data can be flushed + * in one chunk, not seperate 16 byte blocks...) + * + * @param in The plaintext. + * @param out The ciphertext + * @param size how much to encrypt + * @param tfdata: Pointer to the global data structure containing session keys. + * @return none + */ +void _TwoFish_BlockCrypt(u_int8_t *in,u_int8_t *out,unsigned long size,int decrypt,TWOFISH *tfdata) +{ u_int8_t PnMinusOne[TwoFish_BLOCK_SIZE]; + u_int8_t CnMinusOne[TwoFish_BLOCK_SIZE]; + u_int8_t CBCplusCprime[TwoFish_BLOCK_SIZE]; + u_int8_t Pn[TwoFish_BLOCK_SIZE]; + u_int8_t *p,*pout; + unsigned long i; + + /* here is where we implement CBC mode and cipher block stealing */ + if(size==TwoFish_BLOCK_SIZE) + { /* if we are encrypting, CBC means we XOR the plain text block with the */ + /* previous cipher text block before encrypting */ + if(!decrypt && tfdata->qBlockDefined) + { for(p=in,i=0;i<TwoFish_BLOCK_SIZE;i++,p++) + Pn[i]=*p ^ tfdata->qBlockCrypt[i]; /* FK: I'm copying the xor'ed input into Pn... */ + } + else + memcpy(Pn,in,TwoFish_BLOCK_SIZE); /* FK: same here. we work of Pn all the time. */ + + /* TwoFish block level encryption or decryption */ + _TwoFish_BlockCrypt16(Pn,out,decrypt,tfdata); + + /* if we are decrypting, CBC means we XOR the result of the decryption */ + /* with the previous cipher text block to get the resulting plain text */ + if(decrypt && tfdata->qBlockDefined) + { for (p=out,i=0;i<TwoFish_BLOCK_SIZE;i++,p++) + *p^=tfdata->qBlockPlain[i]; + } + + /* save the input and output blocks, since CBC needs these for XOR */ + /* operations */ + _TwoFish_qBlockPush(Pn,out,tfdata); + } + else + { /* cipher block stealing, we are at Pn, */ + /* but since Cn-1 must now be replaced with CnC' */ + /* we pop it off, and recalculate Cn-1 */ + + if(decrypt) + { /* We are on an odd block, and had to do cipher block stealing, */ + /* so the PnMinusOne has to be derived differently. */ + + /* First we decrypt it into CBC and C' */ + _TwoFish_qBlockPop(CnMinusOne,PnMinusOne,tfdata); + _TwoFish_BlockCrypt16(CnMinusOne,CBCplusCprime,decrypt,tfdata); + + /* we then xor the first few bytes with the "in" bytes (Cn) */ + /* to recover Pn, which we put in out */ + for(p=in,pout=out,i=0;i<size;i++,p++,pout++) + *pout=*p ^ CBCplusCprime[i]; + + /* We now recover the original CnMinusOne, which consists of */ + /* the first "size" bytes of "in" data, followed by the */ + /* "Cprime" portion of CBCplusCprime */ + for(p=in,i=0;i<size;i++,p++) + CnMinusOne[i]=*p; + for(;i<TwoFish_BLOCK_SIZE;i++) + CnMinusOne[i]=CBCplusCprime[i]; + + /* we now decrypt CnMinusOne to get PnMinusOne xored with Cn-2 */ + _TwoFish_BlockCrypt16(CnMinusOne,PnMinusOne,decrypt,tfdata); + + for(i=0;i<TwoFish_BLOCK_SIZE;i++) + PnMinusOne[i]=PnMinusOne[i] ^ tfdata->prevCipher[i]; + + /* So at this point, out has PnMinusOne */ + _TwoFish_qBlockPush(CnMinusOne,PnMinusOne,tfdata); + _TwoFish_FlushOutput(tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE,tfdata); + _TwoFish_FlushOutput(out,size,tfdata); + } + else + { _TwoFish_qBlockPop(PnMinusOne,CnMinusOne,tfdata); + memset(Pn,0,TwoFish_BLOCK_SIZE); + memcpy(Pn,in,size); + for(i=0;i<TwoFish_BLOCK_SIZE;i++) + Pn[i]^=CnMinusOne[i]; + _TwoFish_BlockCrypt16(Pn,out,decrypt,tfdata); + _TwoFish_qBlockPush(Pn,out,tfdata); /* now we officially have Cn-1 */ + _TwoFish_FlushOutput(tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE,tfdata); + _TwoFish_FlushOutput(CnMinusOne,size,tfdata); /* old Cn-1 becomes new partial Cn */ + } + tfdata->qBlockDefined=FALSE; + } +} + +void _TwoFish_qBlockPush(u_int8_t *p,u_int8_t *c,TWOFISH *tfdata) +{ if(tfdata->qBlockDefined) + _TwoFish_FlushOutput(tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE,tfdata); + memcpy(tfdata->prevCipher,tfdata->qBlockPlain,TwoFish_BLOCK_SIZE); + memcpy(tfdata->qBlockPlain,p,TwoFish_BLOCK_SIZE); + memcpy(tfdata->qBlockCrypt,c,TwoFish_BLOCK_SIZE); + tfdata->qBlockDefined=TRUE; +} + +void _TwoFish_qBlockPop(u_int8_t *p,u_int8_t *c,TWOFISH *tfdata) +{ memcpy(p,tfdata->qBlockPlain,TwoFish_BLOCK_SIZE ); + memcpy(c,tfdata->qBlockCrypt,TwoFish_BLOCK_SIZE ); + tfdata->qBlockDefined=FALSE; +} + +/* Reset's the CBC flag and zero's PrevCipher (through qBlockPlain) (important) */ +void _TwoFish_ResetCBC(TWOFISH *tfdata) +{ tfdata->qBlockDefined=FALSE; + memset(tfdata->qBlockPlain,0,TwoFish_BLOCK_SIZE); +} + +void _TwoFish_FlushOutput(u_int8_t *b,unsigned long len,TWOFISH *tfdata) +{ unsigned long i; + + for(i=0;i<len && !tfdata->dontflush;i++) + *tfdata->output++ = *b++; + tfdata->dontflush=FALSE; +} + +void _TwoFish_BlockCrypt16(u_int8_t *in,u_int8_t *out,bool decrypt,TWOFISH *tfdata) +{ u_int32_t x0,x1,x2,x3; + u_int32_t k,t0,t1,R; + + + x0=*in++; + x0|=(*in++ << 8 ); + x0|=(*in++ << 16); + x0|=(*in++ << 24); + x1=*in++; + x1|=(*in++ << 8 ); + x1|=(*in++ << 16); + x1|=(*in++ << 24); + x2=*in++; + x2|=(*in++ << 8 ); + x2|=(*in++ << 16); + x2|=(*in++ << 24); + x3=*in++; + x3|=(*in++ << 8 ); + x3|=(*in++ << 16); + x3|=(*in++ << 24); + + if(decrypt) + { x0 ^= tfdata->subKeys[4]; /* swap input and output whitening keys when decrypting */ + x1 ^= tfdata->subKeys[5]; + x2 ^= tfdata->subKeys[6]; + x3 ^= tfdata->subKeys[7]; + + k = 7+(TwoFish_ROUNDS*2); + for (R = 0; R < TwoFish_ROUNDS; R += 2) + { t0 = _TwoFish_Fe320( tfdata->sBox, x0); + t1 = _TwoFish_Fe323( tfdata->sBox, x1); + x3 ^= t0 + (t1<<1) + tfdata->subKeys[k--]; + x3 = x3 >> 1 | x3 << 31; + x2 = x2 << 1 | x2 >> 31; + x2 ^= t0 + t1 + tfdata->subKeys[k--]; + + t0 = _TwoFish_Fe320( tfdata->sBox, x2); + t1 = _TwoFish_Fe323( tfdata->sBox, x3); + x1 ^= t0 + (t1<<1) + tfdata->subKeys[k--]; + x1 = x1 >> 1 | x1 << 31; + x0 = x0 << 1 | x0 >> 31; + x0 ^= t0 + t1 + tfdata->subKeys[k--]; + } + + x2 ^= tfdata->subKeys[0]; + x3 ^= tfdata->subKeys[1]; + x0 ^= tfdata->subKeys[2]; + x1 ^= tfdata->subKeys[3]; + } + else + { x0 ^= tfdata->subKeys[0]; + x1 ^= tfdata->subKeys[1]; + x2 ^= tfdata->subKeys[2]; + x3 ^= tfdata->subKeys[3]; + + k = 8; + for (R = 0; R < TwoFish_ROUNDS; R += 2) + { t0 = _TwoFish_Fe320( tfdata->sBox, x0); + t1 = _TwoFish_Fe323( tfdata->sBox, x1); + x2 ^= t0 + t1 + tfdata->subKeys[k++]; + x2 = x2 >> 1 | x2 << 31; + x3 = x3 << 1 | x3 >> 31; + x3 ^= t0 + (t1<<1) + tfdata->subKeys[k++]; + + t0 = _TwoFish_Fe320( tfdata->sBox, x2); + t1 = _TwoFish_Fe323( tfdata->sBox, x3); + x0 ^= t0 + t1 + tfdata->subKeys[k++]; + x0 = x0 >> 1 | x0 << 31; + x1 = x1 << 1 | x1 >> 31; + x1 ^= t0 + (t1<<1) + tfdata->subKeys[k++]; + } + + x2 ^= tfdata->subKeys[4]; + x3 ^= tfdata->subKeys[5]; + x0 ^= tfdata->subKeys[6]; + x1 ^= tfdata->subKeys[7]; + } + + *out++ = (u_int8_t)(x2 ); + *out++ = (u_int8_t)(x2 >> 8); + *out++ = (u_int8_t)(x2 >> 16); + *out++ = (u_int8_t)(x2 >> 24); + + *out++ = (u_int8_t)(x3 ); + *out++ = (u_int8_t)(x3 >> 8); + *out++ = (u_int8_t)(x3 >> 16); + *out++ = (u_int8_t)(x3 >> 24); + + *out++ = (u_int8_t)(x0 ); + *out++ = (u_int8_t)(x0 >> 8); + *out++ = (u_int8_t)(x0 >> 16); + *out++ = (u_int8_t)(x0 >> 24); + + *out++ = (u_int8_t)(x1 ); + *out++ = (u_int8_t)(x1 >> 8); + *out++ = (u_int8_t)(x1 >> 16); + *out++ = (u_int8_t)(x1 >> 24); +} + +/** + * Use (12, 8) Reed-Solomon code over GF(256) to produce a key S-box + * 32-bit entity from two key material 32-bit entities. + * + * @param k0 1st 32-bit entity. + * @param k1 2nd 32-bit entity. + * @return Remainder polynomial generated using RS code + */ +u_int32_t _TwoFish_RS_MDS_Encode(u_int32_t k0,u_int32_t k1) +{ u_int32_t i,r; + + for(r=k1,i=0;i<4;i++) /* shift 1 byte at a time */ + TwoFish_RS_rem(r); + r ^= k0; + for(i=0;i<4;i++) + TwoFish_RS_rem(r); + + return r; +} + +u_int32_t _TwoFish_F32(u_int32_t k64Cnt,u_int32_t x,u_int32_t *k32) +{ u_int8_t b0,b1,b2,b3; + u_int32_t k0,k1,k2,k3,result = 0; + + b0=TwoFish_b0(x); + b1=TwoFish_b1(x); + b2=TwoFish_b2(x); + b3=TwoFish_b3(x); + k0=k32[0]; + k1=k32[1]; + k2=k32[2]; + k3=k32[3]; + + switch (k64Cnt & 3) + { case 1: /* 64-bit keys */ + result = + TwoFish_MDS[0][(TwoFish_P[TwoFish_P_01][b0] & 0xFF) ^ TwoFish_b0(k0)] ^ + TwoFish_MDS[1][(TwoFish_P[TwoFish_P_11][b1] & 0xFF) ^ TwoFish_b1(k0)] ^ + TwoFish_MDS[2][(TwoFish_P[TwoFish_P_21][b2] & 0xFF) ^ TwoFish_b2(k0)] ^ + TwoFish_MDS[3][(TwoFish_P[TwoFish_P_31][b3] & 0xFF) ^ TwoFish_b3(k0)]; + break; + case 0: /* 256-bit keys (same as 4) */ + b0 = (TwoFish_P[TwoFish_P_04][b0] & 0xFF) ^ TwoFish_b0(k3); + b1 = (TwoFish_P[TwoFish_P_14][b1] & 0xFF) ^ TwoFish_b1(k3); + b2 = (TwoFish_P[TwoFish_P_24][b2] & 0xFF) ^ TwoFish_b2(k3); + b3 = (TwoFish_P[TwoFish_P_34][b3] & 0xFF) ^ TwoFish_b3(k3); + + case 3: /* 192-bit keys */ + b0 = (TwoFish_P[TwoFish_P_03][b0] & 0xFF) ^ TwoFish_b0(k2); + b1 = (TwoFish_P[TwoFish_P_13][b1] & 0xFF) ^ TwoFish_b1(k2); + b2 = (TwoFish_P[TwoFish_P_23][b2] & 0xFF) ^ TwoFish_b2(k2); + b3 = (TwoFish_P[TwoFish_P_33][b3] & 0xFF) ^ TwoFish_b3(k2); + case 2: /* 128-bit keys (optimize for this case) */ + result = + TwoFish_MDS[0][(TwoFish_P[TwoFish_P_01][(TwoFish_P[TwoFish_P_02][b0] & 0xFF) ^ TwoFish_b0(k1)] & 0xFF) ^ TwoFish_b0(k0)] ^ + TwoFish_MDS[1][(TwoFish_P[TwoFish_P_11][(TwoFish_P[TwoFish_P_12][b1] & 0xFF) ^ TwoFish_b1(k1)] & 0xFF) ^ TwoFish_b1(k0)] ^ + TwoFish_MDS[2][(TwoFish_P[TwoFish_P_21][(TwoFish_P[TwoFish_P_22][b2] & 0xFF) ^ TwoFish_b2(k1)] & 0xFF) ^ TwoFish_b2(k0)] ^ + TwoFish_MDS[3][(TwoFish_P[TwoFish_P_31][(TwoFish_P[TwoFish_P_32][b3] & 0xFF) ^ TwoFish_b3(k1)] & 0xFF) ^ TwoFish_b3(k0)]; + break; + } + return result; +} + +u_int32_t _TwoFish_Fe320(u_int32_t *lsBox,u_int32_t x) +{ return lsBox[ TwoFish_b0(x)<<1 ]^ + lsBox[ ((TwoFish_b1(x)<<1)|1)]^ + lsBox[0x200+ (TwoFish_b2(x)<<1) ]^ + lsBox[0x200+((TwoFish_b3(x)<<1)|1)]; +} + +u_int32_t _TwoFish_Fe323(u_int32_t *lsBox,u_int32_t x) +{ return lsBox[ (TwoFish_b3(x)<<1) ]^ + lsBox[ ((TwoFish_b0(x)<<1)|1)]^ + lsBox[0x200+ (TwoFish_b1(x)<<1) ]^ + lsBox[0x200+((TwoFish_b2(x)<<1)|1)]; +} + +u_int32_t _TwoFish_Fe32(u_int32_t *lsBox,u_int32_t x,u_int32_t R) +{ return lsBox[ 2*TwoFish__b(x,R ) ]^ + lsBox[ 2*TwoFish__b(x,R+1)+1]^ + lsBox[0x200+2*TwoFish__b(x,R+2) ]^ + lsBox[0x200+2*TwoFish__b(x,R+3)+1]; +} + + +#endif diff -uNr snort-2.9.5.orig/src/twofish.h snort-2.9.5/src/twofish.h --- snort-2.9.5.orig/src/twofish.h 1970-01-01 01:00:00.000000000 +0100 +++ snort-2.9.5/src/twofish.h 2013-07-08 22:58:33.186668664 +0200 @@ -0,0 +1,276 @@ +/* $Id: twofish.h,v 2.1 2008/12/15 20:36:05 fknobbe Exp $ + * + * + * Copyright (C) 1997-2000 The Cryptix Foundation Limited. + * Copyright (C) 2000 Farm9. + * Copyright (C) 2001 Frank Knobbe. + * All rights reserved. + * + * For Cryptix code: + * Use, modification, copying and distribution of this software is subject + * the terms and conditions of the Cryptix General Licence. You should have + * received a copy of the Cryptix General Licence along with this library; + * if not, you can download a copy from http://www.cryptix.org/ . + * + * For Farm9: + * --- jojo@farm9.com, August 2000, converted from Java to C++, added CBC mode and + * ciphertext stealing technique, added AsciiTwofish class for easy encryption + * decryption of text strings + * + * Frank Knobbe <frank@knobbe.us>: + * --- April 2001, converted from C++ to C, prefixed global variables + * with TwoFish, substituted some defines, changed functions to make use of + * variables supplied in a struct, modified and added routines for modular calls. + * Cleaned up the code so that defines are used instead of fixed 16's and 32's. + * Created two general purpose crypt routines for one block and multiple block + * encryption using Joh's CBC code. + * Added crypt routines that use a header (with a magic and data length). + * (Basically a major rewrite). + * + * Note: Routines labeled _TwoFish are private and should not be used + * (or with extreme caution). + * + */ + +#ifndef __TWOFISH_LIBRARY_HEADER__ +#define __TWOFISH_LIBRARY_HEADER__ + +#ifndef FALSE +#define FALSE 0 +#endif +#ifndef TRUE +#define TRUE !FALSE +#endif +#ifndef bool +#define bool int +#endif + + +/* Constants */ + +#define TwoFish_DEFAULT_PW "SnortHas2FishEncryptionRoutines!" /* default password (not more than 32 chars) */ +#define TwoFish_MAGIC "TwoFish" /* to indentify a successful decryption */ + +enum +{ TwoFish_KEY_SIZE = 256, /* Valid values: 64, 128, 192, 256 */ + /* User 256, other key sizes have not been tested. */ + /* (But should work. I substituted as much as */ + /* I could with this define.) */ + TwoFish_ROUNDS = 16, + TwoFish_BLOCK_SIZE = 16, /* bytes in a data-block */ + TwoFish_KEY_LENGTH = TwoFish_KEY_SIZE/8, /* 32= 256-bit key */ + TwoFish_TOTAL_SUBKEYS = 4+4+2*TwoFish_ROUNDS, + TwoFish_MAGIC_LEN = TwoFish_BLOCK_SIZE-8, + TwoFish_SK_BUMP = 0x01010101, + TwoFish_SK_ROTL = 9, + TwoFish_P_00 = 1, + TwoFish_P_01 = 0, + TwoFish_P_02 = 0, + TwoFish_P_03 = TwoFish_P_01 ^ 1, + TwoFish_P_04 = 1, + TwoFish_P_10 = 0, + TwoFish_P_11 = 0, + TwoFish_P_12 = 1, + TwoFish_P_13 = TwoFish_P_11 ^ 1, + TwoFish_P_14 = 0, + TwoFish_P_20 = 1, + TwoFish_P_21 = 1, + TwoFish_P_22 = 0, + TwoFish_P_23 = TwoFish_P_21 ^ 1, + TwoFish_P_24 = 0, + TwoFish_P_30 = 0, + TwoFish_P_31 = 1, + TwoFish_P_32 = 1, + TwoFish_P_33 = TwoFish_P_31 ^ 1, + TwoFish_P_34 = 1, + TwoFish_GF256_FDBK = 0x169, + TwoFish_GF256_FDBK_2 = 0x169 / 2, + TwoFish_GF256_FDBK_4 = 0x169 / 4, + TwoFish_RS_GF_FDBK = 0x14D, /* field generator */ + TwoFish_MDS_GF_FDBK = 0x169 /* primitive polynomial for GF(256) */ +}; + + +/* Global data structure for callers */ + +typedef struct +{ u_int32_t sBox[4 * 256]; /* Key dependent S-box */ + u_int32_t subKeys[TwoFish_TOTAL_SUBKEYS]; /* Subkeys */ + u_int8_t key[TwoFish_KEY_LENGTH]; /* Encryption Key */ + u_int8_t *output; /* Pointer to output buffer */ + u_int8_t qBlockPlain[TwoFish_BLOCK_SIZE]; /* Used by CBC */ + u_int8_t qBlockCrypt[TwoFish_BLOCK_SIZE]; + u_int8_t prevCipher[TwoFish_BLOCK_SIZE]; + struct /* Header for crypt functions. Has to be at least one block long. */ + { u_int32_t salt; /* Random salt in first block (will salt the rest through CBC) */ + u_int8_t length[4]; /* The amount of data following the header */ + u_int8_t magic[TwoFish_MAGIC_LEN]; /* Magic to identify successful decryption */ + } header; + bool qBlockDefined; + bool dontflush; +} TWOFISH; + +#ifndef __TWOFISH_LIBRARY_SOURCE__ + +extern bool TwoFish_srand; /* if set to TRUE (default), first call of TwoFishInit will seed rand(); */ + /* call of TwoFishInit */ +#endif + + +/**** Public Functions ****/ + +/* TwoFish Initialization + * + * This routine generates a global data structure for use with TwoFish, + * initializes important values (such as subkeys, sBoxes), generates subkeys + * and precomputes the MDS matrix if not already done. + * + * Input: User supplied password (will be appended by default password of 'SnortHas2FishEncryptionRoutines!') + * + * Output: Pointer to TWOFISH structure. This data structure contains key dependent data. + * This pointer is used with all other crypt functions. + */ +TWOFISH *TwoFishInit(char *userkey); + + +/* TwoFish Destroy + * + * Nothing else but a free... + * + * Input: Pointer to the TwoFish structure. + * + */ +void TwoFishDestroy(TWOFISH *tfdata); + + +/* TwoFish Alloc + * + * Allocates enough memory for the output buffer as required. + * + * Input: Length of the plaintext. + * Boolean flag for BinHex Output. + * Pointer to the TwoFish structure. + * + * Output: Returns a pointer to the memory allocated. + */ +void *TwoFishAlloc(unsigned long len,bool binhex,bool decrypt,TWOFISH *tfdata); + + +/* TwoFish Free + * + * Free's the allocated buffer. + * + * Input: Pointer to the TwoFish structure + * + * Output: (none) + */ +void TwoFishFree(TWOFISH *tfdata); + + +/* TwoFish Set Output + * + * If you want to allocate the output buffer yourself, + * then you can set it with this function. + * + * Input: Pointer to your output buffer + * Pointer to the TwoFish structure + * + * Output: (none) + */ +void TwoFishSetOutput(char *outp,TWOFISH *tfdata); + + +/* TwoFish Raw Encryption + * + * Does not use header, but does use CBC (if more than one block has to be encrypted). + * + * Input: Pointer to the buffer of the plaintext to be encrypted. + * Pointer to the buffer receiving the ciphertext. + * The length of the plaintext buffer. + * The TwoFish structure. + * + * Output: The amount of bytes encrypted if successful, otherwise 0. + */ +unsigned long TwoFishEncryptRaw(char *in,char *out,unsigned long len,TWOFISH *tfdata); + +/* TwoFish Raw Decryption + * + * Does not use header, but does use CBC (if more than one block has to be decrypted). + * + * Input: Pointer to the buffer of the ciphertext to be decrypted. + * Pointer to the buffer receiving the plaintext. + * The length of the ciphertext buffer (at least one cipher block). + * The TwoFish structure. + * + * Output: The amount of bytes decrypted if successful, otherwise 0. + */ +unsigned long TwoFishDecryptRaw(char *in,char *out,unsigned long len,TWOFISH *tfdata); + + +/* TwoFish Encryption + * + * Uses header and CBC. If the output area has not been intialized with TwoFishAlloc, + * this routine will alloc the memory. In addition, it will include a small 'header' + * containing the magic and some salt. That way the decrypt routine can check if the + * packet got decrypted successfully, and return 0 instead of garbage. + * + * Input: Pointer to the buffer of the plaintext to be encrypted. + * Pointer to the pointer to the buffer receiving the ciphertext. + * The pointer either points to user allocated output buffer space, or to NULL, in which case + * this routine will set the pointer to the buffer allocated through the struct. + * The length of the plaintext buffer. + * Can be -1 if the input is a null terminated string, in which case we'll count for you. + * Boolean flag for BinHex Output (if used, output will be twice as large as input). + * Note: BinHex conversion overwrites (converts) input buffer! + * The TwoFish structure. + * + * Output: The amount of bytes encrypted if successful, otherwise 0. + */ +unsigned long TwoFishEncrypt(char *in,char **out,signed long len,bool binhex,TWOFISH *tfdata); + + +/* TwoFish Decryption + * + * Uses header and CBC. If the output area has not been intialized with TwoFishAlloc, + * this routine will alloc the memory. In addition, it will check the small 'header' + * containing the magic. If magic does not match we return 0. Otherwise we return the + * amount of bytes decrypted (should be the same as the length in the header). + * + * Input: Pointer to the buffer of the ciphertext to be decrypted. + * Pointer to the pointer to the buffer receiving the plaintext. + * The pointer either points to user allocated output buffer space, or to NULL, in which case + * this routine will set the pointer to the buffer allocated through the struct. + * The length of the ciphertext buffer. + * Can be -1 if the input is a null terminated binhex string, in which case we'll count for you. + * Boolean flag for BinHex Input (if used, plaintext will be half as large as input). + * Note: BinHex conversion overwrites (converts) input buffer! + * The TwoFish structure. + * + * Output: The amount of bytes decrypted if successful, otherwise 0. + */ +unsigned long TwoFishDecrypt(char *in,char **out,signed long len,bool binhex,TWOFISH *tfdata); + + +/**** Private Functions ****/ + +u_int8_t TwoFish__b(u_int32_t x,int n); +void _TwoFish_BinHex(u_int8_t *buf,unsigned long len,bool bintohex); +unsigned long _TwoFish_CryptRawCBC(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata); +unsigned long _TwoFish_CryptRaw16(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata); +unsigned long _TwoFish_CryptRaw(char *in,char *out,unsigned long len,bool decrypt,TWOFISH *tfdata); +void _TwoFish_PrecomputeMDSmatrix(void); +void _TwoFish_MakeSubKeys(TWOFISH *tfdata); +void _TwoFish_qBlockPush(u_int8_t *p,u_int8_t *c,TWOFISH *tfdata); +void _TwoFish_qBlockPop(u_int8_t *p,u_int8_t *c,TWOFISH *tfdata); +void _TwoFish_ResetCBC(TWOFISH *tfdata); +void _TwoFish_FlushOutput(u_int8_t *b,unsigned long len,TWOFISH *tfdata); +void _TwoFish_BlockCrypt(u_int8_t *in,u_int8_t *out,unsigned long size,int decrypt,TWOFISH *tfdata); +void _TwoFish_BlockCrypt16(u_int8_t *in,u_int8_t *out,bool decrypt,TWOFISH *tfdata); +u_int32_t _TwoFish_RS_MDS_Encode(u_int32_t k0,u_int32_t k1); +u_int32_t _TwoFish_F32(u_int32_t k64Cnt,u_int32_t x,u_int32_t *k32); +u_int32_t _TwoFish_Fe320(u_int32_t *lsBox,u_int32_t x); +u_int32_t _TwoFish_Fe323(u_int32_t *lsBox,u_int32_t x); +u_int32_t _TwoFish_Fe32(u_int32_t *lsBox,u_int32_t x,u_int32_t R); + + +#endif
