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| -rw-r--r-- | print-isakmp.c | 3141 |
1 files changed, 3141 insertions, 0 deletions
diff --git a/print-isakmp.c b/print-isakmp.c new file mode 100644 index 0000000..c08bbc0 --- /dev/null +++ b/print-isakmp.c @@ -0,0 +1,3141 @@ +/* + * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the project nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +/* \summary: Internet Security Association and Key Management Protocol (ISAKMP) printer */ + +/* specification: RFC 2407, RFC 2408, RFC 5996 */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +/* The functions from print-esp.c used in this file are only defined when both + * OpenSSL and evp.h are detected. Employ the same preprocessor device here. + */ +#ifndef HAVE_OPENSSL_EVP_H +#undef HAVE_LIBCRYPTO +#endif + +#include "netdissect-stdinc.h" + +#include <string.h> + +#include "netdissect-ctype.h" + +#include "netdissect.h" +#include "addrtoname.h" +#include "extract.h" + +#include "ip.h" +#include "ip6.h" +#include "ipproto.h" + +typedef nd_byte cookie_t[8]; +typedef nd_byte msgid_t[4]; + +#define PORT_ISAKMP 500 + +/* 3.1 ISAKMP Header Format (IKEv1 and IKEv2) + 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! Initiator ! + ! Cookie ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! Responder ! + ! Cookie ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! Next Payload ! MjVer ! MnVer ! Exchange Type ! Flags ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! Message ID ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! Length ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +*/ +struct isakmp { + cookie_t i_ck; /* Initiator Cookie */ + cookie_t r_ck; /* Responder Cookie */ + nd_uint8_t np; /* Next Payload Type */ + nd_uint8_t vers; +#define ISAKMP_VERS_MAJOR 0xf0 +#define ISAKMP_VERS_MAJOR_SHIFT 4 +#define ISAKMP_VERS_MINOR 0x0f +#define ISAKMP_VERS_MINOR_SHIFT 0 + nd_uint8_t etype; /* Exchange Type */ + nd_uint8_t flags; /* Flags */ + msgid_t msgid; + nd_uint32_t len; /* Length */ +}; + +/* Next Payload Type */ +#define ISAKMP_NPTYPE_NONE 0 /* NONE*/ +#define ISAKMP_NPTYPE_SA 1 /* Security Association */ +#define ISAKMP_NPTYPE_P 2 /* Proposal */ +#define ISAKMP_NPTYPE_T 3 /* Transform */ +#define ISAKMP_NPTYPE_KE 4 /* Key Exchange */ +#define ISAKMP_NPTYPE_ID 5 /* Identification */ +#define ISAKMP_NPTYPE_CERT 6 /* Certificate */ +#define ISAKMP_NPTYPE_CR 7 /* Certificate Request */ +#define ISAKMP_NPTYPE_HASH 8 /* Hash */ +#define ISAKMP_NPTYPE_SIG 9 /* Signature */ +#define ISAKMP_NPTYPE_NONCE 10 /* Nonce */ +#define ISAKMP_NPTYPE_N 11 /* Notification */ +#define ISAKMP_NPTYPE_D 12 /* Delete */ +#define ISAKMP_NPTYPE_VID 13 /* Vendor ID */ +#define ISAKMP_NPTYPE_v2E 46 /* v2 Encrypted payload */ + +#define IKEv1_MAJOR_VERSION 1 +#define IKEv1_MINOR_VERSION 0 + +#define IKEv2_MAJOR_VERSION 2 +#define IKEv2_MINOR_VERSION 0 + +/* Flags */ +#define ISAKMP_FLAG_E 0x01 /* Encryption Bit */ +#define ISAKMP_FLAG_C 0x02 /* Commit Bit */ +#define ISAKMP_FLAG_extra 0x04 + +/* IKEv2 */ +#define ISAKMP_FLAG_I (1 << 3) /* (I)nitiator */ +#define ISAKMP_FLAG_V (1 << 4) /* (V)ersion */ +#define ISAKMP_FLAG_R (1 << 5) /* (R)esponse */ + + +/* 3.2 Payload Generic Header + 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + ! Next Payload ! RESERVED ! Payload Length ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +*/ +struct isakmp_gen { + nd_uint8_t np; /* Next Payload */ + nd_uint8_t critical; /* bit 7 - critical, rest is RESERVED */ + nd_uint16_t len; /* Payload Length */ +}; + +/* 3.3 Data Attributes + 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + !A! Attribute Type ! AF=0 Attribute Length ! + !F! ! AF=1 Attribute Value ! + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + . AF=0 Attribute Value . + . AF=1 Not Transmitted . + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +*/ +struct isakmp_data { + nd_uint16_t type; /* defined by DOI-spec, and Attribute Format */ + nd_uint16_t lorv; /* if f equal 1, Attribute Length */ + /* if f equal 0, Attribute Value */ + /* if f equal 1, Attribute Value */ +}; + +/* 3.4 Security Association Payload */ + /* MAY NOT be used, because of being defined in ipsec-doi. */ + /* + If the current payload is the last in the message, + then the value of the next payload field will be 0. + This field MUST NOT contain the + values for the Proposal or Transform payloads as they are considered + part of the security association negotiation. For example, this + field would contain the value "10" (Nonce payload) in the first + message of a Base Exchange (see Section 4.4) and the value "0" in the + first message of an Identity Protect Exchange (see Section 4.5). + */ +struct ikev1_pl_sa { + struct isakmp_gen h; + nd_uint32_t doi; /* Domain of Interpretation */ + nd_uint32_t sit; /* Situation */ +}; + +/* 3.5 Proposal Payload */ + /* + The value of the next payload field MUST only contain the value "2" + or "0". If there are additional Proposal payloads in the message, + then this field will be 2. If the current Proposal payload is the + last within the security association proposal, then this field will + be 0. + */ +struct ikev1_pl_p { + struct isakmp_gen h; + nd_uint8_t p_no; /* Proposal # */ + nd_uint8_t prot_id; /* Protocol */ + nd_uint8_t spi_size; /* SPI Size */ + nd_uint8_t num_t; /* Number of Transforms */ + /* SPI */ +}; + +/* 3.6 Transform Payload */ + /* + The value of the next payload field MUST only contain the value "3" + or "0". If there are additional Transform payloads in the proposal, + then this field will be 3. If the current Transform payload is the + last within the proposal, then this field will be 0. + */ +struct ikev1_pl_t { + struct isakmp_gen h; + nd_uint8_t t_no; /* Transform # */ + nd_uint8_t t_id; /* Transform-Id */ + nd_byte reserved[2]; /* RESERVED2 */ + /* SA Attributes */ +}; + +/* 3.7 Key Exchange Payload */ +struct ikev1_pl_ke { + struct isakmp_gen h; + /* Key Exchange Data */ +}; + +/* 3.8 Identification Payload */ + /* MUST NOT to be used, because of being defined in ipsec-doi. */ +struct ikev1_pl_id { + struct isakmp_gen h; + union { + nd_uint8_t id_type; /* ID Type */ + nd_uint32_t doi_data; /* DOI Specific ID Data */ + } d; + /* Identification Data */ +}; + +/* 3.9 Certificate Payload */ +struct ikev1_pl_cert { + struct isakmp_gen h; + nd_uint8_t encode; /* Cert Encoding */ + nd_uint8_t cert; /* Certificate Data */ + /* + This field indicates the type of + certificate or certificate-related information contained in the + Certificate Data field. + */ +}; + +/* 3.10 Certificate Request Payload */ +struct ikev1_pl_cr { + struct isakmp_gen h; + nd_uint8_t num_cert; /* # Cert. Types */ + /* + Certificate Types (variable length) + -- Contains a list of the types of certificates requested, + sorted in order of preference. Each individual certificate + type is 1 octet. This field is NOT requiredo + */ + /* # Certificate Authorities (1 octet) */ + /* Certificate Authorities (variable length) */ +}; + +/* 3.11 Hash Payload */ + /* may not be used, because of having only data. */ +struct ikev1_pl_hash { + struct isakmp_gen h; + /* Hash Data */ +}; + +/* 3.12 Signature Payload */ + /* may not be used, because of having only data. */ +struct ikev1_pl_sig { + struct isakmp_gen h; + /* Signature Data */ +}; + +/* 3.13 Nonce Payload */ + /* may not be used, because of having only data. */ +struct ikev1_pl_nonce { + struct isakmp_gen h; + /* Nonce Data */ +}; + +/* 3.14 Notification Payload */ +struct ikev1_pl_n { + struct isakmp_gen h; + nd_uint32_t doi; /* Domain of Interpretation */ + nd_uint8_t prot_id; /* Protocol-ID */ + nd_uint8_t spi_size; /* SPI Size */ + nd_uint16_t type; /* Notify Message Type */ + /* SPI */ + /* Notification Data */ +}; + +/* 3.14.1 Notify Message Types */ +/* NOTIFY MESSAGES - ERROR TYPES */ +#define ISAKMP_NTYPE_INVALID_PAYLOAD_TYPE 1 +#define ISAKMP_NTYPE_DOI_NOT_SUPPORTED 2 +#define ISAKMP_NTYPE_SITUATION_NOT_SUPPORTED 3 +#define ISAKMP_NTYPE_INVALID_COOKIE 4 +#define ISAKMP_NTYPE_INVALID_MAJOR_VERSION 5 +#define ISAKMP_NTYPE_INVALID_MINOR_VERSION 6 +#define ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE 7 +#define ISAKMP_NTYPE_INVALID_FLAGS 8 +#define ISAKMP_NTYPE_INVALID_MESSAGE_ID 9 +#define ISAKMP_NTYPE_INVALID_PROTOCOL_ID 10 +#define ISAKMP_NTYPE_INVALID_SPI 11 +#define ISAKMP_NTYPE_INVALID_TRANSFORM_ID 12 +#define ISAKMP_NTYPE_ATTRIBUTES_NOT_SUPPORTED 13 +#define ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN 14 +#define ISAKMP_NTYPE_BAD_PROPOSAL_SYNTAX 15 +#define ISAKMP_NTYPE_PAYLOAD_MALFORMED 16 +#define ISAKMP_NTYPE_INVALID_KEY_INFORMATION 17 +#define ISAKMP_NTYPE_INVALID_ID_INFORMATION 18 +#define ISAKMP_NTYPE_INVALID_CERT_ENCODING 19 +#define ISAKMP_NTYPE_INVALID_CERTIFICATE 20 +#define ISAKMP_NTYPE_BAD_CERT_REQUEST_SYNTAX 21 +#define ISAKMP_NTYPE_INVALID_CERT_AUTHORITY 22 +#define ISAKMP_NTYPE_INVALID_HASH_INFORMATION 23 +#define ISAKMP_NTYPE_AUTHENTICATION_FAILED 24 +#define ISAKMP_NTYPE_INVALID_SIGNATURE 25 +#define ISAKMP_NTYPE_ADDRESS_NOTIFICATION 26 + +/* 3.15 Delete Payload */ +struct ikev1_pl_d { + struct isakmp_gen h; + nd_uint32_t doi; /* Domain of Interpretation */ + nd_uint8_t prot_id; /* Protocol-Id */ + nd_uint8_t spi_size; /* SPI Size */ + nd_uint16_t num_spi; /* # of SPIs */ + /* SPI(es) */ +}; + +/* IKEv2 (RFC4306) */ + +/* 3.3 Security Association Payload -- generic header */ +/* 3.3.1. Proposal Substructure */ +struct ikev2_p { + struct isakmp_gen h; + nd_uint8_t p_no; /* Proposal # */ + nd_uint8_t prot_id; /* Protocol */ + nd_uint8_t spi_size; /* SPI Size */ + nd_uint8_t num_t; /* Number of Transforms */ +}; + +/* 3.3.2. Transform Substructure */ +struct ikev2_t { + struct isakmp_gen h; + nd_uint8_t t_type; /* Transform Type (ENCR,PRF,INTEG,etc.*/ + nd_byte res2; /* reserved byte */ + nd_uint16_t t_id; /* Transform ID */ +}; + +enum ikev2_t_type { + IV2_T_ENCR = 1, + IV2_T_PRF = 2, + IV2_T_INTEG= 3, + IV2_T_DH = 4, + IV2_T_ESN = 5 +}; + +/* 3.4. Key Exchange Payload */ +struct ikev2_ke { + struct isakmp_gen h; + nd_uint16_t ke_group; + nd_uint16_t ke_res1; + /* KE data */ +}; + + +/* 3.5. Identification Payloads */ +enum ikev2_id_type { + ID_IPV4_ADDR=1, + ID_FQDN=2, + ID_RFC822_ADDR=3, + ID_IPV6_ADDR=5, + ID_DER_ASN1_DN=9, + ID_DER_ASN1_GN=10, + ID_KEY_ID=11 +}; +struct ikev2_id { + struct isakmp_gen h; + nd_uint8_t type; /* ID type */ + nd_byte res1; + nd_byte res2[2]; + /* SPI */ + /* Notification Data */ +}; + +/* 3.10 Notification Payload */ +struct ikev2_n { + struct isakmp_gen h; + nd_uint8_t prot_id; /* Protocol-ID */ + nd_uint8_t spi_size; /* SPI Size */ + nd_uint16_t type; /* Notify Message Type */ +}; + +enum ikev2_n_type { + IV2_NOTIFY_UNSUPPORTED_CRITICAL_PAYLOAD = 1, + IV2_NOTIFY_INVALID_IKE_SPI = 4, + IV2_NOTIFY_INVALID_MAJOR_VERSION = 5, + IV2_NOTIFY_INVALID_SYNTAX = 7, + IV2_NOTIFY_INVALID_MESSAGE_ID = 9, + IV2_NOTIFY_INVALID_SPI =11, + IV2_NOTIFY_NO_PROPOSAL_CHOSEN =14, + IV2_NOTIFY_INVALID_KE_PAYLOAD =17, + IV2_NOTIFY_AUTHENTICATION_FAILED =24, + IV2_NOTIFY_SINGLE_PAIR_REQUIRED =34, + IV2_NOTIFY_NO_ADDITIONAL_SAS =35, + IV2_NOTIFY_INTERNAL_ADDRESS_FAILURE =36, + IV2_NOTIFY_FAILED_CP_REQUIRED =37, + IV2_NOTIFY_INVALID_SELECTORS =39, + IV2_NOTIFY_INITIAL_CONTACT =16384, + IV2_NOTIFY_SET_WINDOW_SIZE =16385, + IV2_NOTIFY_ADDITIONAL_TS_POSSIBLE =16386, + IV2_NOTIFY_IPCOMP_SUPPORTED =16387, + IV2_NOTIFY_NAT_DETECTION_SOURCE_IP =16388, + IV2_NOTIFY_NAT_DETECTION_DESTINATION_IP =16389, + IV2_NOTIFY_COOKIE =16390, + IV2_NOTIFY_USE_TRANSPORT_MODE =16391, + IV2_NOTIFY_HTTP_CERT_LOOKUP_SUPPORTED =16392, + IV2_NOTIFY_REKEY_SA =16393, + IV2_NOTIFY_ESP_TFC_PADDING_NOT_SUPPORTED =16394, + IV2_NOTIFY_NON_FIRST_FRAGMENTS_ALSO =16395 +}; + +struct notify_messages { + uint16_t type; + char *msg; +}; + +/* 3.8 Authentication Payload */ +struct ikev2_auth { + struct isakmp_gen h; + nd_uint8_t auth_method; /* Protocol-ID */ + nd_byte reserved[3]; + /* authentication data */ +}; + +enum ikev2_auth_type { + IV2_RSA_SIG = 1, + IV2_SHARED = 2, + IV2_DSS_SIG = 3 +}; + +/* refer to RFC 2409 */ + +#if 0 +/* isakmp sa structure */ +struct oakley_sa { + uint8_t proto_id; /* OAKLEY */ + vchar_t *spi; /* spi */ + uint8_t dhgrp; /* DH; group */ + uint8_t auth_t; /* method of authentication */ + uint8_t prf_t; /* type of prf */ + uint8_t hash_t; /* type of hash */ + uint8_t enc_t; /* type of cipher */ + uint8_t life_t; /* type of duration of lifetime */ + uint32_t ldur; /* life duration */ +}; +#endif + +/* refer to RFC 2407 */ + +#define IPSEC_DOI 1 + +/* 4.2 IPSEC Situation Definition */ +#define IPSECDOI_SIT_IDENTITY_ONLY 0x00000001 +#define IPSECDOI_SIT_SECRECY 0x00000002 +#define IPSECDOI_SIT_INTEGRITY 0x00000004 + +/* 4.4.1 IPSEC Security Protocol Identifiers */ + /* 4.4.2 IPSEC ISAKMP Transform Values */ +#define IPSECDOI_PROTO_ISAKMP 1 +#define IPSECDOI_KEY_IKE 1 + +/* 4.4.1 IPSEC Security Protocol Identifiers */ +#define IPSECDOI_PROTO_IPSEC_AH 2 + /* 4.4.3 IPSEC AH Transform Values */ +#define IPSECDOI_AH_MD5 2 +#define IPSECDOI_AH_SHA 3 +#define IPSECDOI_AH_DES 4 +#define IPSECDOI_AH_SHA2_256 5 +#define IPSECDOI_AH_SHA2_384 6 +#define IPSECDOI_AH_SHA2_512 7 + +/* 4.4.1 IPSEC Security Protocol Identifiers */ +#define IPSECDOI_PROTO_IPSEC_ESP 3 + /* 4.4.4 IPSEC ESP Transform Identifiers */ +#define IPSECDOI_ESP_DES_IV64 1 +#define IPSECDOI_ESP_DES 2 +#define IPSECDOI_ESP_3DES 3 +#define IPSECDOI_ESP_RC5 4 +#define IPSECDOI_ESP_IDEA 5 +#define IPSECDOI_ESP_CAST 6 +#define IPSECDOI_ESP_BLOWFISH 7 +#define IPSECDOI_ESP_3IDEA 8 +#define IPSECDOI_ESP_DES_IV32 9 +#define IPSECDOI_ESP_RC4 10 +#define IPSECDOI_ESP_NULL 11 +#define IPSECDOI_ESP_RIJNDAEL 12 +#define IPSECDOI_ESP_AES 12 + +/* 4.4.1 IPSEC Security Protocol Identifiers */ +#define IPSECDOI_PROTO_IPCOMP 4 + /* 4.4.5 IPSEC IPCOMP Transform Identifiers */ +#define IPSECDOI_IPCOMP_OUI 1 +#define IPSECDOI_IPCOMP_DEFLATE 2 +#define IPSECDOI_IPCOMP_LZS 3 + +/* 4.5 IPSEC Security Association Attributes */ +#define IPSECDOI_ATTR_SA_LTYPE 1 /* B */ +#define IPSECDOI_ATTR_SA_LTYPE_DEFAULT 1 +#define IPSECDOI_ATTR_SA_LTYPE_SEC 1 +#define IPSECDOI_ATTR_SA_LTYPE_KB 2 +#define IPSECDOI_ATTR_SA_LDUR 2 /* V */ +#define IPSECDOI_ATTR_SA_LDUR_DEFAULT 28800 /* 8 hours */ +#define IPSECDOI_ATTR_GRP_DESC 3 /* B */ +#define IPSECDOI_ATTR_ENC_MODE 4 /* B */ + /* default value: host dependent */ +#define IPSECDOI_ATTR_ENC_MODE_TUNNEL 1 +#define IPSECDOI_ATTR_ENC_MODE_TRNS 2 +#define IPSECDOI_ATTR_AUTH 5 /* B */ + /* 0 means not to use authentication. */ +#define IPSECDOI_ATTR_AUTH_HMAC_MD5 1 +#define IPSECDOI_ATTR_AUTH_HMAC_SHA1 2 +#define IPSECDOI_ATTR_AUTH_DES_MAC 3 +#define IPSECDOI_ATTR_AUTH_KPDK 4 /*RFC-1826(Key/Pad/Data/Key)*/ + /* + * When negotiating ESP without authentication, the Auth + * Algorithm attribute MUST NOT be included in the proposal. + * When negotiating ESP without confidentiality, the Auth + * Algorithm attribute MUST be included in the proposal and + * the ESP transform ID must be ESP_NULL. + */ +#define IPSECDOI_ATTR_KEY_LENGTH 6 /* B */ +#define IPSECDOI_ATTR_KEY_ROUNDS 7 /* B */ +#define IPSECDOI_ATTR_COMP_DICT_SIZE 8 /* B */ +#define IPSECDOI_ATTR_COMP_PRIVALG 9 /* V */ + +/* 4.6.1 Security Association Payload */ +struct ipsecdoi_sa { + struct isakmp_gen h; + nd_uint32_t doi; /* Domain of Interpretation */ + nd_uint32_t sit; /* Situation */ +}; + +struct ipsecdoi_secrecy_h { + nd_uint16_t len; + nd_uint16_t reserved; +}; + +/* 4.6.2.1 Identification Type Values */ +struct ipsecdoi_id { + struct isakmp_gen h; + nd_uint8_t type; /* ID Type */ + nd_uint8_t proto_id; /* Protocol ID */ + nd_uint16_t port; /* Port */ + /* Identification Data */ +}; + +#define IPSECDOI_ID_IPV4_ADDR 1 +#define IPSECDOI_ID_FQDN 2 +#define IPSECDOI_ID_USER_FQDN 3 +#define IPSECDOI_ID_IPV4_ADDR_SUBNET 4 +#define IPSECDOI_ID_IPV6_ADDR 5 +#define IPSECDOI_ID_IPV6_ADDR_SUBNET 6 +#define IPSECDOI_ID_IPV4_ADDR_RANGE 7 +#define IPSECDOI_ID_IPV6_ADDR_RANGE 8 +#define IPSECDOI_ID_DER_ASN1_DN 9 +#define IPSECDOI_ID_DER_ASN1_GN 10 +#define IPSECDOI_ID_KEY_ID 11 + +/* 4.6.3 IPSEC DOI Notify Message Types */ +/* Notify Messages - Status Types */ +#define IPSECDOI_NTYPE_RESPONDER_LIFETIME 24576 +#define IPSECDOI_NTYPE_REPLAY_STATUS 24577 +#define IPSECDOI_NTYPE_INITIAL_CONTACT 24578 + +#define DECLARE_PRINTER(func) static const u_char *ike##func##_print( \ + netdissect_options *ndo, u_char tpay, \ + const struct isakmp_gen *ext, \ + u_int item_len, \ + const u_char *end_pointer, \ + uint32_t phase,\ + uint32_t doi0, \ + uint32_t proto0, int depth) + +DECLARE_PRINTER(v1_sa); +DECLARE_PRINTER(v1_p); +DECLARE_PRINTER(v1_t); +DECLARE_PRINTER(v1_ke); +DECLARE_PRINTER(v1_id); +DECLARE_PRINTER(v1_cert); +DECLARE_PRINTER(v1_cr); +DECLARE_PRINTER(v1_sig); +DECLARE_PRINTER(v1_hash); +DECLARE_PRINTER(v1_nonce); +DECLARE_PRINTER(v1_n); +DECLARE_PRINTER(v1_d); +DECLARE_PRINTER(v1_vid); + +DECLARE_PRINTER(v2_sa); +DECLARE_PRINTER(v2_ke); +DECLARE_PRINTER(v2_ID); +DECLARE_PRINTER(v2_cert); +DECLARE_PRINTER(v2_cr); +DECLARE_PRINTER(v2_auth); +DECLARE_PRINTER(v2_nonce); +DECLARE_PRINTER(v2_n); +DECLARE_PRINTER(v2_d); +DECLARE_PRINTER(v2_vid); +DECLARE_PRINTER(v2_TS); +DECLARE_PRINTER(v2_cp); +DECLARE_PRINTER(v2_eap); + +static const u_char *ikev2_e_print(netdissect_options *ndo, + const struct isakmp *base, + u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, + const u_char *end_pointer, + uint32_t phase, + uint32_t doi0, + uint32_t proto0, int depth); + + +static const u_char *ike_sub0_print(netdissect_options *ndo,u_char, const struct isakmp_gen *, + const u_char *, uint32_t, uint32_t, uint32_t, int); +static const u_char *ikev1_sub_print(netdissect_options *ndo,u_char, const struct isakmp_gen *, + const u_char *, uint32_t, uint32_t, uint32_t, int); + +static const u_char *ikev2_sub_print(netdissect_options *ndo, + const struct isakmp *base, + u_char np, const struct isakmp_gen *ext, + const u_char *ep, uint32_t phase, + uint32_t doi, uint32_t proto, + int depth); + + +static char *numstr(u_int); + +static void +ikev1_print(netdissect_options *ndo, + const u_char *bp, u_int length, + const u_char *bp2, const struct isakmp *base); + +#define MAXINITIATORS 20 +static int ninitiator = 0; +union inaddr_u { + nd_ipv4 in4; + nd_ipv6 in6; +}; +static struct { + cookie_t initiator; + u_int version; + union inaddr_u iaddr; + union inaddr_u raddr; +} cookiecache[MAXINITIATORS]; + +/* protocol id */ +static const char *protoidstr[] = { + NULL, "isakmp", "ipsec-ah", "ipsec-esp", "ipcomp", +}; + +/* isakmp->np */ +static const char *npstr[] = { + "none", "sa", "p", "t", "ke", "id", "cert", "cr", "hash", /* 0 - 8 */ + "sig", "nonce", "n", "d", "vid", /* 9 - 13 */ + "pay14", "pay15", "pay16", "pay17", "pay18", /* 14- 18 */ + "pay19", "pay20", "pay21", "pay22", "pay23", /* 19- 23 */ + "pay24", "pay25", "pay26", "pay27", "pay28", /* 24- 28 */ + "pay29", "pay30", "pay31", "pay32", /* 29- 32 */ + "v2sa", "v2ke", "v2IDi", "v2IDr", "v2cert",/* 33- 37 */ + "v2cr", "v2auth","v2nonce", "v2n", "v2d", /* 38- 42 */ + "v2vid", "v2TSi", "v2TSr", "v2e", "v2cp", /* 43- 47 */ + "v2eap", /* 48 */ + +}; + +/* isakmp->np */ +static const u_char *(*npfunc[])(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, + const u_char *end_pointer, + uint32_t phase, + uint32_t doi0, + uint32_t proto0, int depth) = { + NULL, + ikev1_sa_print, + ikev1_p_print, + ikev1_t_print, + ikev1_ke_print, + ikev1_id_print, + ikev1_cert_print, + ikev1_cr_print, + ikev1_hash_print, + ikev1_sig_print, + ikev1_nonce_print, + ikev1_n_print, + ikev1_d_print, + ikev1_vid_print, /* 13 */ + NULL, NULL, NULL, NULL, NULL, /* 14- 18 */ + NULL, NULL, NULL, NULL, NULL, /* 19- 23 */ + NULL, NULL, NULL, NULL, NULL, /* 24- 28 */ + NULL, NULL, NULL, NULL, /* 29- 32 */ + ikev2_sa_print, /* 33 */ + ikev2_ke_print, /* 34 */ + ikev2_ID_print, /* 35 */ + ikev2_ID_print, /* 36 */ + ikev2_cert_print, /* 37 */ + ikev2_cr_print, /* 38 */ + ikev2_auth_print, /* 39 */ + ikev2_nonce_print, /* 40 */ + ikev2_n_print, /* 41 */ + ikev2_d_print, /* 42 */ + ikev2_vid_print, /* 43 */ + ikev2_TS_print, /* 44 */ + ikev2_TS_print, /* 45 */ + NULL, /* ikev2_e_print,*/ /* 46 - special */ + ikev2_cp_print, /* 47 */ + ikev2_eap_print, /* 48 */ +}; + +/* isakmp->etype */ +static const char *etypestr[] = { +/* IKEv1 exchange types */ + "none", "base", "ident", "auth", "agg", "inf", NULL, NULL, /* 0-7 */ + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* 8-15 */ + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* 16-23 */ + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, /* 24-31 */ + "oakley-quick", "oakley-newgroup", /* 32-33 */ +/* IKEv2 exchange types */ + "ikev2_init", "ikev2_auth", "child_sa", "inf2" /* 34-37 */ +}; + +#define STR_OR_ID(x, tab) \ + (((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)]) ? tab[(x)] : numstr(x)) +#define PROTOIDSTR(x) STR_OR_ID(x, protoidstr) +#define NPSTR(x) STR_OR_ID(x, npstr) +#define ETYPESTR(x) STR_OR_ID(x, etypestr) + +#define CHECKLEN(p, np) \ + if (ep < (const u_char *)(p)) { \ + ND_PRINT(" [|%s]", NPSTR(np)); \ + goto done; \ + } + + +#define NPFUNC(x) \ + (((x) < sizeof(npfunc)/sizeof(npfunc[0]) && npfunc[(x)]) \ + ? npfunc[(x)] : NULL) + +static int +iszero(netdissect_options *ndo, const u_char *p, size_t l) +{ + while (l != 0) { + if (GET_U_1(p)) + return 0; + p++; + l--; + } + return 1; +} + +/* find cookie from initiator cache */ +static int +cookie_find(const cookie_t *in) +{ + int i; + + for (i = 0; i < MAXINITIATORS; i++) { + if (memcmp(in, &cookiecache[i].initiator, sizeof(*in)) == 0) + return i; + } + + return -1; +} + +/* record initiator */ +static void +cookie_record(netdissect_options *ndo, const cookie_t *in, const u_char *bp2) +{ + int i; + const struct ip *ip; + const struct ip6_hdr *ip6; + + i = cookie_find(in); + if (0 <= i) { + ninitiator = (i + 1) % MAXINITIATORS; + return; + } + + ip = (const struct ip *)bp2; + switch (IP_V(ip)) { + case 4: + cookiecache[ninitiator].version = 4; + UNALIGNED_MEMCPY(&cookiecache[ninitiator].iaddr.in4, + ip->ip_src, sizeof(nd_ipv4)); + UNALIGNED_MEMCPY(&cookiecache[ninitiator].raddr.in4, + ip->ip_dst, sizeof(nd_ipv4)); + break; + case 6: + ip6 = (const struct ip6_hdr *)bp2; + cookiecache[ninitiator].version = 6; + UNALIGNED_MEMCPY(&cookiecache[ninitiator].iaddr.in6, + ip6->ip6_src, sizeof(nd_ipv6)); + UNALIGNED_MEMCPY(&cookiecache[ninitiator].raddr.in6, + ip6->ip6_dst, sizeof(nd_ipv6)); + break; + default: + return; + } + UNALIGNED_MEMCPY(&cookiecache[ninitiator].initiator, in, sizeof(*in)); + ninitiator = (ninitiator + 1) % MAXINITIATORS; +} + +#define cookie_isinitiator(ndo, x, y) cookie_sidecheck(ndo, (x), (y), 1) +#define cookie_isresponder(ndo, x, y) cookie_sidecheck(ndo, (x), (y), 0) +static int +cookie_sidecheck(netdissect_options *ndo, int i, const u_char *bp2, int initiator) +{ + const struct ip *ip; + const struct ip6_hdr *ip6; + + ip = (const struct ip *)bp2; + switch (IP_V(ip)) { + case 4: + if (cookiecache[i].version != 4) + return 0; + if (initiator) { + if (UNALIGNED_MEMCMP(ip->ip_src, &cookiecache[i].iaddr.in4, sizeof(nd_ipv4)) == 0) + return 1; + } else { + if (UNALIGNED_MEMCMP(ip->ip_src, &cookiecache[i].raddr.in4, sizeof(nd_ipv4)) == 0) + return 1; + } + break; + case 6: + if (cookiecache[i].version != 6) + return 0; + ip6 = (const struct ip6_hdr *)bp2; + if (initiator) { + if (UNALIGNED_MEMCMP(ip6->ip6_src, &cookiecache[i].iaddr.in6, sizeof(nd_ipv6)) == 0) + return 1; + } else { + if (UNALIGNED_MEMCMP(ip6->ip6_src, &cookiecache[i].raddr.in6, sizeof(nd_ipv6)) == 0) + return 1; + } + break; + default: + break; + } + + return 0; +} + +static void +hexprint(netdissect_options *ndo, const uint8_t *loc, size_t len) +{ + const uint8_t *p; + size_t i; + + p = loc; + for (i = 0; i < len; i++) + ND_PRINT("%02x", p[i] & 0xff); +} + +static int +rawprint(netdissect_options *ndo, const uint8_t *loc, size_t len) +{ + ND_TCHECK_LEN(loc, len); + + hexprint(ndo, loc, len); + return 1; +trunc: + return 0; +} + + +/* + * returns false if we run out of data buffer + */ +static int ike_show_somedata(netdissect_options *ndo, + const u_char *cp, const u_char *ep) +{ + /* there is too much data, just show some of it */ + const u_char *end = ep - 20; + size_t elen = 20; + size_t len = ep - cp; + if(len > 10) { + len = 10; + } + + /* really shouldn't happen because of above */ + if(end < cp + len) { + end = cp+len; + elen = ep - end; + } + + ND_PRINT(" data=("); + if(!rawprint(ndo, (const uint8_t *)(cp), len)) goto trunc; + ND_PRINT("..."); + if(elen) { + if(!rawprint(ndo, (const uint8_t *)(end), elen)) goto trunc; + } + ND_PRINT(")"); + return 1; + +trunc: + return 0; +} + +struct attrmap { + const char *type; + u_int nvalue; + const char *value[30]; /*XXX*/ +}; + +static const u_char * +ikev1_attrmap_print(netdissect_options *ndo, + const u_char *p, const u_char *ep2, + const struct attrmap *map, size_t nmap) +{ + u_int totlen; + uint32_t t, v; + + if (GET_U_1(p) & 0x80) + totlen = 4; + else { + totlen = 4 + GET_BE_U_2(p + 2); + } + if (ep2 < p + totlen) { + ND_PRINT("[|attr]"); + return ep2 + 1; + } + + ND_PRINT("("); + t = GET_BE_U_2(p) & 0x7fff; + if (map && t < nmap && map[t].type) + ND_PRINT("type=%s ", map[t].type); + else + ND_PRINT("type=#%u ", t); + if (GET_U_1(p) & 0x80) { + ND_PRINT("value="); + v = GET_BE_U_2(p + 2); + if (map && t < nmap && v < map[t].nvalue && map[t].value[v]) + ND_PRINT("%s", map[t].value[v]); + else { + if (!rawprint(ndo, (const uint8_t *)(p + 2), 2)) { + ND_PRINT(")"); + goto trunc; + } + } + } else { + ND_PRINT("len=%u value=", totlen - 4); + if (!rawprint(ndo, (const uint8_t *)(p + 4), totlen - 4)) { + ND_PRINT(")"); + goto trunc; + } + } + ND_PRINT(")"); + return p + totlen; + +trunc: + return NULL; +} + +static const u_char * +ikev1_attr_print(netdissect_options *ndo, const u_char *p, const u_char *ep2) +{ + u_int totlen; + uint32_t t; + + if (GET_U_1(p) & 0x80) + totlen = 4; + else { + totlen = 4 + GET_BE_U_2(p + 2); + } + if (ep2 < p + totlen) { + ND_PRINT("[|attr]"); + return ep2 + 1; + } + + ND_PRINT("("); + t = GET_BE_U_2(p) & 0x7fff; + ND_PRINT("type=#%u ", t); + if (GET_U_1(p) & 0x80) { + ND_PRINT("value="); + t = GET_U_1(p + 2); + if (!rawprint(ndo, (const uint8_t *)(p + 2), 2)) { + ND_PRINT(")"); + goto trunc; + } + } else { + ND_PRINT("len=%u value=", totlen - 4); + if (!rawprint(ndo, (const uint8_t *)(p + 4), totlen - 4)) { + ND_PRINT(")"); + goto trunc; + } + } + ND_PRINT(")"); + return p + totlen; + +trunc: + return NULL; +} + +static const u_char * +ikev1_sa_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, + u_int item_len _U_, + const u_char *ep, uint32_t phase, uint32_t doi0 _U_, + uint32_t proto0, int depth) +{ + const struct ikev1_pl_sa *p; + uint32_t doi, sit, ident; + const u_char *cp, *np; + int t; + + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_SA)); + + p = (const struct ikev1_pl_sa *)ext; + ND_TCHECK_SIZE(p); + doi = GET_BE_U_4(p->doi); + sit = GET_BE_U_4(p->sit); + if (doi != 1) { + ND_PRINT(" doi=%u", doi); + ND_PRINT(" situation=%u", sit); + return (const u_char *)(p + 1); + } + + ND_PRINT(" doi=ipsec"); + ND_PRINT(" situation="); + t = 0; + if (sit & 0x01) { + ND_PRINT("identity"); + t++; + } + if (sit & 0x02) { + ND_PRINT("%ssecrecy", t ? "+" : ""); + t++; + } + if (sit & 0x04) + ND_PRINT("%sintegrity", t ? "+" : ""); + + np = (const u_char *)ext + sizeof(struct ikev1_pl_sa); + if (sit != 0x01) { + ident = GET_BE_U_4(ext + 1); + ND_PRINT(" ident=%u", ident); + np += sizeof(ident); + } + + ext = (const struct isakmp_gen *)np; + ND_TCHECK_SIZE(ext); + + cp = ikev1_sub_print(ndo, ISAKMP_NPTYPE_P, ext, ep, phase, doi, proto0, + depth); + + return cp; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_SA)); + return NULL; +} + +static const u_char * +ikev1_p_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, u_int item_len _U_, + const u_char *ep, uint32_t phase, uint32_t doi0, + uint32_t proto0 _U_, int depth) +{ + const struct ikev1_pl_p *p; + const u_char *cp; + uint8_t spi_size; + + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_P)); + + p = (const struct ikev1_pl_p *)ext; + ND_TCHECK_SIZE(p); + ND_PRINT(" #%u protoid=%s transform=%u", + GET_U_1(p->p_no), PROTOIDSTR(GET_U_1(p->prot_id)), + GET_U_1(p->num_t)); + spi_size = GET_U_1(p->spi_size); + if (spi_size) { + ND_PRINT(" spi="); + if (!rawprint(ndo, (const uint8_t *)(p + 1), spi_size)) + goto trunc; + } + + ext = (const struct isakmp_gen *)((const u_char *)(p + 1) + spi_size); + ND_TCHECK_SIZE(ext); + + cp = ikev1_sub_print(ndo, ISAKMP_NPTYPE_T, ext, ep, phase, doi0, + GET_U_1(p->prot_id), depth); + + return cp; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_P)); + return NULL; +} + +static const char *ikev1_p_map[] = { + NULL, "ike", +}; + +static const char *ikev2_t_type_map[]={ + NULL, "encr", "prf", "integ", "dh", "esn" +}; + +static const char *ah_p_map[] = { + NULL, "(reserved)", "md5", "sha", "1des", + "sha2-256", "sha2-384", "sha2-512", +}; + +static const char *prf_p_map[] = { + NULL, "hmac-md5", "hmac-sha", "hmac-tiger", + "aes128_xcbc" +}; + +static const char *integ_p_map[] = { + NULL, "hmac-md5", "hmac-sha", "dec-mac", + "kpdk-md5", "aes-xcbc" +}; + +static const char *esn_p_map[] = { + "no-esn", "esn" +}; + +static const char *dh_p_map[] = { + NULL, "modp768", + "modp1024", /* group 2 */ + "EC2N 2^155", /* group 3 */ + "EC2N 2^185", /* group 4 */ + "modp1536", /* group 5 */ + "iana-grp06", "iana-grp07", /* reserved */ + "iana-grp08", "iana-grp09", + "iana-grp10", "iana-grp11", + "iana-grp12", "iana-grp13", + "modp2048", /* group 14 */ + "modp3072", /* group 15 */ + "modp4096", /* group 16 */ + "modp6144", /* group 17 */ + "modp8192", /* group 18 */ +}; + +static const char *esp_p_map[] = { + NULL, "1des-iv64", "1des", "3des", "rc5", "idea", "cast", + "blowfish", "3idea", "1des-iv32", "rc4", "null", "aes" +}; + +static const char *ipcomp_p_map[] = { + NULL, "oui", "deflate", "lzs", +}; + +static const struct attrmap ipsec_t_map[] = { + { NULL, 0, { NULL } }, + { "lifetype", 3, { NULL, "sec", "kb", }, }, + { "life", 0, { NULL } }, + { "group desc", 18, { NULL, "modp768", + "modp1024", /* group 2 */ + "EC2N 2^155", /* group 3 */ + "EC2N 2^185", /* group 4 */ + "modp1536", /* group 5 */ + "iana-grp06", "iana-grp07", /* reserved */ + "iana-grp08", "iana-grp09", + "iana-grp10", "iana-grp11", + "iana-grp12", "iana-grp13", + "modp2048", /* group 14 */ + "modp3072", /* group 15 */ + "modp4096", /* group 16 */ + "modp6144", /* group 17 */ + "modp8192", /* group 18 */ + }, }, + { "enc mode", 3, { NULL, "tunnel", "transport", }, }, + { "auth", 5, { NULL, "hmac-md5", "hmac-sha1", "1des-mac", "keyed", }, }, + { "keylen", 0, { NULL } }, + { "rounds", 0, { NULL } }, + { "dictsize", 0, { NULL } }, + { "privalg", 0, { NULL } }, +}; + +static const struct attrmap encr_t_map[] = { + { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 0, 1 */ + { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 2, 3 */ + { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 4, 5 */ + { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 6, 7 */ + { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 8, 9 */ + { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 10,11*/ + { NULL, 0, { NULL } }, { NULL, 0, { NULL } }, /* 12,13*/ + { "keylen", 14, { NULL }}, +}; + +static const struct attrmap oakley_t_map[] = { + { NULL, 0, { NULL } }, + { "enc", 8, { NULL, "1des", "idea", "blowfish", "rc5", + "3des", "cast", "aes", }, }, + { "hash", 7, { NULL, "md5", "sha1", "tiger", + "sha2-256", "sha2-384", "sha2-512", }, }, + { "auth", 6, { NULL, "preshared", "dss", "rsa sig", "rsa enc", + "rsa enc revised", }, }, + { "group desc", 18, { NULL, "modp768", + "modp1024", /* group 2 */ + "EC2N 2^155", /* group 3 */ + "EC2N 2^185", /* group 4 */ + "modp1536", /* group 5 */ + "iana-grp06", "iana-grp07", /* reserved */ + "iana-grp08", "iana-grp09", + "iana-grp10", "iana-grp11", + "iana-grp12", "iana-grp13", + "modp2048", /* group 14 */ + "modp3072", /* group 15 */ + "modp4096", /* group 16 */ + "modp6144", /* group 17 */ + "modp8192", /* group 18 */ + }, }, + { "group type", 4, { NULL, "MODP", "ECP", "EC2N", }, }, + { "group prime", 0, { NULL } }, + { "group gen1", 0, { NULL } }, + { "group gen2", 0, { NULL } }, + { "group curve A", 0, { NULL } }, + { "group curve B", 0, { NULL } }, + { "lifetype", 3, { NULL, "sec", "kb", }, }, + { "lifeduration", 0, { NULL } }, + { "prf", 0, { NULL } }, + { "keylen", 0, { NULL } }, + { "field", 0, { NULL } }, + { "order", 0, { NULL } }, +}; + +static const u_char * +ikev1_t_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, u_int item_len, + const u_char *ep, uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto, int depth _U_) +{ + const struct ikev1_pl_t *p; + const u_char *cp; + const char *idstr; + const struct attrmap *map; + size_t nmap; + const u_char *ep2; + + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_T)); + + p = (const struct ikev1_pl_t *)ext; + ND_TCHECK_SIZE(p); + + switch (proto) { + case 1: + idstr = STR_OR_ID(GET_U_1(p->t_id), ikev1_p_map); + map = oakley_t_map; + nmap = sizeof(oakley_t_map)/sizeof(oakley_t_map[0]); + break; + case 2: + idstr = STR_OR_ID(GET_U_1(p->t_id), ah_p_map); + map = ipsec_t_map; + nmap = sizeof(ipsec_t_map)/sizeof(ipsec_t_map[0]); + break; + case 3: + idstr = STR_OR_ID(GET_U_1(p->t_id), esp_p_map); + map = ipsec_t_map; + nmap = sizeof(ipsec_t_map)/sizeof(ipsec_t_map[0]); + break; + case 4: + idstr = STR_OR_ID(GET_U_1(p->t_id), ipcomp_p_map); + map = ipsec_t_map; + nmap = sizeof(ipsec_t_map)/sizeof(ipsec_t_map[0]); + break; + default: + idstr = NULL; + map = NULL; + nmap = 0; + break; + } + + if (idstr) + ND_PRINT(" #%u id=%s ", GET_U_1(p->t_no), idstr); + else + ND_PRINT(" #%u id=%u ", GET_U_1(p->t_no), GET_U_1(p->t_id)); + cp = (const u_char *)(p + 1); + ep2 = (const u_char *)p + item_len; + while (cp < ep && cp < ep2) { + if (map && nmap) + cp = ikev1_attrmap_print(ndo, cp, ep2, map, nmap); + else + cp = ikev1_attr_print(ndo, cp, ep2); + if (cp == NULL) + goto trunc; + } + if (ep < ep2) + ND_PRINT("..."); + return cp; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_T)); + return NULL; +} + +static const u_char * +ikev1_ke_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, u_int item_len, + const u_char *ep _U_, uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_KE)); + + ND_TCHECK_SIZE(ext); + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" key len=%u", item_len - 4); + if (2 < ndo->ndo_vflag && item_len > 4) { + /* Print the entire payload in hex */ + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4)) + goto trunc; + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_KE)); + return NULL; +} + +static const u_char * +ikev1_id_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, u_int item_len, + const u_char *ep _U_, uint32_t phase, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ +#define USE_IPSECDOI_IN_PHASE1 1 + const struct ikev1_pl_id *p; + static const char *idtypestr[] = { + "IPv4", "IPv4net", "IPv6", "IPv6net", + }; + static const char *ipsecidtypestr[] = { + NULL, "IPv4", "FQDN", "user FQDN", "IPv4net", "IPv6", + "IPv6net", "IPv4range", "IPv6range", "ASN1 DN", "ASN1 GN", + "keyid", + }; + u_int len; + const u_char *data; + + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_ID)); + + p = (const struct ikev1_pl_id *)ext; + ND_TCHECK_SIZE(p); + if (sizeof(*p) < item_len) { + data = (const u_char *)(p + 1); + len = item_len - sizeof(*p); + } else { + data = NULL; + len = 0; + } + +#if 0 /*debug*/ + ND_PRINT(" [phase=%u doi=%u proto=%u]", phase, doi, proto); +#endif + switch (phase) { +#ifndef USE_IPSECDOI_IN_PHASE1 + case 1: +#endif + default: + ND_PRINT(" idtype=%s", + STR_OR_ID(GET_U_1(p->d.id_type), idtypestr)); + ND_PRINT(" doi_data=%u", + GET_BE_U_4(p->d.doi_data) & 0xffffff); + break; + +#ifdef USE_IPSECDOI_IN_PHASE1 + case 1: +#endif + case 2: + { + const struct ipsecdoi_id *doi_p; + const char *p_name; + uint8_t type, proto_id; + + doi_p = (const struct ipsecdoi_id *)ext; + ND_TCHECK_SIZE(doi_p); + type = GET_U_1(doi_p->type); + ND_PRINT(" idtype=%s", STR_OR_ID(type, ipsecidtypestr)); + /* A protocol ID of 0 DOES NOT mean IPPROTO_IP! */ + proto_id = GET_U_1(doi_p->proto_id); + if (!ndo->ndo_nflag && proto_id && (p_name = netdb_protoname(proto_id)) != NULL) + ND_PRINT(" protoid=%s", p_name); + else + ND_PRINT(" protoid=%u", proto_id); + ND_PRINT(" port=%u", GET_BE_U_2(doi_p->port)); + if (!len) + break; + if (data == NULL) + goto trunc; + ND_TCHECK_LEN(data, len); + switch (type) { + case IPSECDOI_ID_IPV4_ADDR: + if (len < 4) + ND_PRINT(" len=%u [bad: < 4]", len); + else + ND_PRINT(" len=%u %s", len, GET_IPADDR_STRING(data)); + len = 0; + break; + case IPSECDOI_ID_FQDN: + case IPSECDOI_ID_USER_FQDN: + { + u_int i; + ND_PRINT(" len=%u ", len); + for (i = 0; i < len; i++) + fn_print_char(ndo, GET_U_1(data + i)); + len = 0; + break; + } + case IPSECDOI_ID_IPV4_ADDR_SUBNET: + { + const u_char *mask; + if (len < 8) + ND_PRINT(" len=%u [bad: < 8]", len); + else { + mask = data + sizeof(nd_ipv4); + ND_PRINT(" len=%u %s/%u.%u.%u.%u", len, + GET_IPADDR_STRING(data), + GET_U_1(mask), GET_U_1(mask + 1), + GET_U_1(mask + 2), + GET_U_1(mask + 3)); + } + len = 0; + break; + } + case IPSECDOI_ID_IPV6_ADDR: + if (len < 16) + ND_PRINT(" len=%u [bad: < 16]", len); + else + ND_PRINT(" len=%u %s", len, GET_IP6ADDR_STRING(data)); + len = 0; + break; + case IPSECDOI_ID_IPV6_ADDR_SUBNET: + { + const u_char *mask; + if (len < 32) + ND_PRINT(" len=%u [bad: < 32]", len); + else { + mask = (const u_char *)(data + sizeof(nd_ipv6)); + /*XXX*/ + ND_PRINT(" len=%u %s/0x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x", len, + GET_IP6ADDR_STRING(data), + GET_U_1(mask), GET_U_1(mask + 1), + GET_U_1(mask + 2), + GET_U_1(mask + 3), + GET_U_1(mask + 4), + GET_U_1(mask + 5), + GET_U_1(mask + 6), + GET_U_1(mask + 7), + GET_U_1(mask + 8), + GET_U_1(mask + 9), + GET_U_1(mask + 10), + GET_U_1(mask + 11), + GET_U_1(mask + 12), + GET_U_1(mask + 13), + GET_U_1(mask + 14), + GET_U_1(mask + 15)); + } + len = 0; + break; + } + case IPSECDOI_ID_IPV4_ADDR_RANGE: + if (len < 8) + ND_PRINT(" len=%u [bad: < 8]", len); + else { + ND_PRINT(" len=%u %s-%s", len, + GET_IPADDR_STRING(data), + GET_IPADDR_STRING(data + sizeof(nd_ipv4))); + } + len = 0; + break; + case IPSECDOI_ID_IPV6_ADDR_RANGE: + if (len < 32) + ND_PRINT(" len=%u [bad: < 32]", len); + else { + ND_PRINT(" len=%u %s-%s", len, + GET_IP6ADDR_STRING(data), + GET_IP6ADDR_STRING(data + sizeof(nd_ipv6))); + } + len = 0; + break; + case IPSECDOI_ID_DER_ASN1_DN: + case IPSECDOI_ID_DER_ASN1_GN: + case IPSECDOI_ID_KEY_ID: + break; + } + break; + } + } + if (data && len) { + ND_PRINT(" len=%u", len); + if (2 < ndo->ndo_vflag) { + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)data, len)) + goto trunc; + } + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_ID)); + return NULL; +} + +static const u_char * +ikev1_cert_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, u_int item_len, + const u_char *ep _U_, uint32_t phase _U_, + uint32_t doi0 _U_, + uint32_t proto0 _U_, int depth _U_) +{ + const struct ikev1_pl_cert *p; + static const char *certstr[] = { + "none", "pkcs7", "pgp", "dns", + "x509sign", "x509ke", "kerberos", "crl", + "arl", "spki", "x509attr", + }; + + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_CERT)); + + p = (const struct ikev1_pl_cert *)ext; + ND_TCHECK_SIZE(p); + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" len=%u", item_len - 4); + ND_PRINT(" type=%s", STR_OR_ID(GET_U_1(p->encode), certstr)); + if (2 < ndo->ndo_vflag && 4 < item_len) { + /* Print the entire payload in hex */ + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4)) + goto trunc; + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_CERT)); + return NULL; +} + +static const u_char * +ikev1_cr_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, u_int item_len, + const u_char *ep _U_, uint32_t phase _U_, uint32_t doi0 _U_, + uint32_t proto0 _U_, int depth _U_) +{ + const struct ikev1_pl_cert *p; + static const char *certstr[] = { + "none", "pkcs7", "pgp", "dns", + "x509sign", "x509ke", "kerberos", "crl", + "arl", "spki", "x509attr", + }; + + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_CR)); + + p = (const struct ikev1_pl_cert *)ext; + ND_TCHECK_SIZE(p); + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" len=%u", item_len - 4); + ND_PRINT(" type=%s", STR_OR_ID(GET_U_1(p->encode), certstr)); + if (2 < ndo->ndo_vflag && 4 < item_len) { + /* Print the entire payload in hex */ + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4)) + goto trunc; + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_CR)); + return NULL; +} + +static const u_char * +ikev1_hash_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, u_int item_len, + const u_char *ep _U_, uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_HASH)); + + ND_TCHECK_SIZE(ext); + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" len=%u", item_len - 4); + if (2 < ndo->ndo_vflag && 4 < item_len) { + /* Print the entire payload in hex */ + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4)) + goto trunc; + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_HASH)); + return NULL; +} + +static const u_char * +ikev1_sig_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, u_int item_len, + const u_char *ep _U_, uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_SIG)); + + ND_TCHECK_SIZE(ext); + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" len=%u", item_len - 4); + if (2 < ndo->ndo_vflag && 4 < item_len) { + /* Print the entire payload in hex */ + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4)) + goto trunc; + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_SIG)); + return NULL; +} + +static const u_char * +ikev1_nonce_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, + u_int item_len, + const u_char *ep, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_NONCE)); + + ND_TCHECK_SIZE(ext); + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" n len=%u", item_len - 4); + if (item_len > 4) { + if (ndo->ndo_vflag > 2) { + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4)) + goto trunc; + } else if (ndo->ndo_vflag > 1) { + ND_PRINT(" "); + if (!ike_show_somedata(ndo, (const u_char *)(ext + 1), ep)) + goto trunc; + } + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_NONCE)); + return NULL; +} + +static const u_char * +ikev1_n_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, u_int item_len, + const u_char *ep, uint32_t phase _U_, uint32_t doi0 _U_, + uint32_t proto0 _U_, int depth _U_) +{ + const struct ikev1_pl_n *p; + const u_char *cp; + const u_char *ep2; + uint32_t doi; + uint32_t proto; + uint16_t type; + uint8_t spi_size; + static const char *notify_error_str[] = { + NULL, "INVALID-PAYLOAD-TYPE", + "DOI-NOT-SUPPORTED", "SITUATION-NOT-SUPPORTED", + "INVALID-COOKIE", "INVALID-MAJOR-VERSION", + "INVALID-MINOR-VERSION", "INVALID-EXCHANGE-TYPE", + "INVALID-FLAGS", "INVALID-MESSAGE-ID", + "INVALID-PROTOCOL-ID", "INVALID-SPI", + "INVALID-TRANSFORM-ID", "ATTRIBUTES-NOT-SUPPORTED", + "NO-PROPOSAL-CHOSEN", "BAD-PROPOSAL-SYNTAX", + "PAYLOAD-MALFORMED", "INVALID-KEY-INFORMATION", + "INVALID-ID-INFORMATION", "INVALID-CERT-ENCODING", + "INVALID-CERTIFICATE", "CERT-TYPE-UNSUPPORTED", + "INVALID-CERT-AUTHORITY", "INVALID-HASH-INFORMATION", + "AUTHENTICATION-FAILED", "INVALID-SIGNATURE", + "ADDRESS-NOTIFICATION", "NOTIFY-SA-LIFETIME", + "CERTIFICATE-UNAVAILABLE", "UNSUPPORTED-EXCHANGE-TYPE", + "UNEQUAL-PAYLOAD-LENGTHS", + }; + static const char *ipsec_notify_error_str[] = { + "RESERVED", + }; + static const char *notify_status_str[] = { + "CONNECTED", + }; + static const char *ipsec_notify_status_str[] = { + "RESPONDER-LIFETIME", "REPLAY-STATUS", + "INITIAL-CONTACT", + }; +/* NOTE: these macro must be called with x in proper range */ + +/* 0 - 8191 */ +#define NOTIFY_ERROR_STR(x) \ + STR_OR_ID((x), notify_error_str) + +/* 8192 - 16383 */ +#define IPSEC_NOTIFY_ERROR_STR(x) \ + STR_OR_ID((u_int)((x) - 8192), ipsec_notify_error_str) + +/* 16384 - 24575 */ +#define NOTIFY_STATUS_STR(x) \ + STR_OR_ID((u_int)((x) - 16384), notify_status_str) + +/* 24576 - 32767 */ +#define IPSEC_NOTIFY_STATUS_STR(x) \ + STR_OR_ID((u_int)((x) - 24576), ipsec_notify_status_str) + + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_N)); + + p = (const struct ikev1_pl_n *)ext; + ND_TCHECK_SIZE(p); + doi = GET_BE_U_4(p->doi); + proto = GET_U_1(p->prot_id); + if (doi != 1) { + ND_PRINT(" doi=%u", doi); + ND_PRINT(" proto=%u", proto); + type = GET_BE_U_2(p->type); + if (type < 8192) + ND_PRINT(" type=%s", NOTIFY_ERROR_STR(type)); + else if (type < 16384) + ND_PRINT(" type=%s", numstr(type)); + else if (type < 24576) + ND_PRINT(" type=%s", NOTIFY_STATUS_STR(type)); + else + ND_PRINT(" type=%s", numstr(type)); + spi_size = GET_U_1(p->spi_size); + if (spi_size) { + ND_PRINT(" spi="); + if (!rawprint(ndo, (const uint8_t *)(p + 1), spi_size)) + goto trunc; + } + return (const u_char *)(p + 1) + spi_size; + } + + ND_PRINT(" doi=ipsec"); + ND_PRINT(" proto=%s", PROTOIDSTR(proto)); + type = GET_BE_U_2(p->type); + if (type < 8192) + ND_PRINT(" type=%s", NOTIFY_ERROR_STR(type)); + else if (type < 16384) + ND_PRINT(" type=%s", IPSEC_NOTIFY_ERROR_STR(type)); + else if (type < 24576) + ND_PRINT(" type=%s", NOTIFY_STATUS_STR(type)); + else if (type < 32768) + ND_PRINT(" type=%s", IPSEC_NOTIFY_STATUS_STR(type)); + else + ND_PRINT(" type=%s", numstr(type)); + spi_size = GET_U_1(p->spi_size); + if (spi_size) { + ND_PRINT(" spi="); + if (!rawprint(ndo, (const uint8_t *)(p + 1), spi_size)) + goto trunc; + } + + cp = (const u_char *)(p + 1) + spi_size; + ep2 = (const u_char *)p + item_len; + + if (cp < ep) { + switch (type) { + case IPSECDOI_NTYPE_RESPONDER_LIFETIME: + { + const struct attrmap *map = oakley_t_map; + size_t nmap = sizeof(oakley_t_map)/sizeof(oakley_t_map[0]); + ND_PRINT(" attrs=("); + while (cp < ep && cp < ep2) { + cp = ikev1_attrmap_print(ndo, cp, ep2, map, nmap); + if (cp == NULL) { + ND_PRINT(")"); + goto trunc; + } + } + ND_PRINT(")"); + break; + } + case IPSECDOI_NTYPE_REPLAY_STATUS: + ND_PRINT(" status=("); + ND_PRINT("replay detection %sabled", + GET_BE_U_4(cp) ? "en" : "dis"); + ND_PRINT(")"); + break; + default: + /* + * XXX - fill in more types here; see, for example, + * draft-ietf-ipsec-notifymsg-04. + */ + if (ndo->ndo_vflag > 3) { + ND_PRINT(" data=("); + if (!rawprint(ndo, (const uint8_t *)(cp), ep - cp)) + goto trunc; + ND_PRINT(")"); + } else { + if (!ike_show_somedata(ndo, cp, ep)) + goto trunc; + } + break; + } + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_N)); + return NULL; +} + +static const u_char * +ikev1_d_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, u_int item_len _U_, + const u_char *ep _U_, uint32_t phase _U_, uint32_t doi0 _U_, + uint32_t proto0 _U_, int depth _U_) +{ + const struct ikev1_pl_d *p; + const uint8_t *q; + uint32_t doi; + uint32_t proto; + uint8_t spi_size; + uint16_t num_spi; + u_int i; + + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_D)); + + p = (const struct ikev1_pl_d *)ext; + ND_TCHECK_SIZE(p); + doi = GET_BE_U_4(p->doi); + proto = GET_U_1(p->prot_id); + if (doi != 1) { + ND_PRINT(" doi=%u", doi); + ND_PRINT(" proto=%u", proto); + } else { + ND_PRINT(" doi=ipsec"); + ND_PRINT(" proto=%s", PROTOIDSTR(proto)); + } + spi_size = GET_U_1(p->spi_size); + ND_PRINT(" spilen=%u", spi_size); + num_spi = GET_BE_U_2(p->num_spi); + ND_PRINT(" nspi=%u", num_spi); + ND_PRINT(" spi="); + q = (const uint8_t *)(p + 1); + for (i = 0; i < num_spi; i++) { + if (i != 0) + ND_PRINT(","); + if (!rawprint(ndo, (const uint8_t *)q, spi_size)) + goto trunc; + q += spi_size; + } + return q; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_D)); + return NULL; +} + +static const u_char * +ikev1_vid_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep _U_, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + ND_PRINT("%s:", NPSTR(ISAKMP_NPTYPE_VID)); + + ND_TCHECK_SIZE(ext); + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" len=%u", item_len - 4); + if (2 < ndo->ndo_vflag && 4 < item_len) { + /* Print the entire payload in hex */ + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4)) + goto trunc; + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_VID)); + return NULL; +} + +/************************************************************/ +/* */ +/* IKE v2 - rfc4306 - dissector */ +/* */ +/************************************************************/ + +static void +ikev2_pay_print(netdissect_options *ndo, const char *payname, uint8_t critical) +{ + ND_PRINT("%s%s:", payname, critical&0x80 ? "[C]" : ""); +} + +static const u_char * +ikev2_gen_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, u_int item_len) +{ + const struct isakmp_gen *p = (const struct isakmp_gen *)ext; + + ND_TCHECK_SIZE(ext); + ikev2_pay_print(ndo, NPSTR(tpay), GET_U_1(p->critical)); + + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" len=%u", item_len - 4); + if (2 < ndo->ndo_vflag && 4 < item_len) { + /* Print the entire payload in hex */ + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4)) + goto trunc; + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(tpay)); + return NULL; +} + +static const u_char * +ikev2_t_print(netdissect_options *ndo, int tcount, + const struct isakmp_gen *ext, u_int item_len, + const u_char *ep) +{ + const struct ikev2_t *p; + uint16_t t_id; + uint8_t t_type; + const u_char *cp; + const char *idstr; + const struct attrmap *map; + size_t nmap; + const u_char *ep2; + + p = (const struct ikev2_t *)ext; + ND_TCHECK_SIZE(p); + ikev2_pay_print(ndo, NPSTR(ISAKMP_NPTYPE_T), GET_U_1(p->h.critical)); + + t_id = GET_BE_U_2(p->t_id); + + map = NULL; + nmap = 0; + + t_type = GET_U_1(p->t_type); + switch (t_type) { + case IV2_T_ENCR: + idstr = STR_OR_ID(t_id, esp_p_map); + map = encr_t_map; + nmap = sizeof(encr_t_map)/sizeof(encr_t_map[0]); + break; + + case IV2_T_PRF: + idstr = STR_OR_ID(t_id, prf_p_map); + break; + + case IV2_T_INTEG: + idstr = STR_OR_ID(t_id, integ_p_map); + break; + + case IV2_T_DH: + idstr = STR_OR_ID(t_id, dh_p_map); + break; + + case IV2_T_ESN: + idstr = STR_OR_ID(t_id, esn_p_map); + break; + + default: + idstr = NULL; + break; + } + + if (idstr) + ND_PRINT(" #%u type=%s id=%s ", tcount, + STR_OR_ID(t_type, ikev2_t_type_map), + idstr); + else + ND_PRINT(" #%u type=%s id=%u ", tcount, + STR_OR_ID(t_type, ikev2_t_type_map), + t_id); + cp = (const u_char *)(p + 1); + ep2 = (const u_char *)p + item_len; + while (cp < ep && cp < ep2) { + if (map && nmap) { + cp = ikev1_attrmap_print(ndo, cp, ep2, map, nmap); + } else + cp = ikev1_attr_print(ndo, cp, ep2); + if (cp == NULL) + goto trunc; + } + if (ep < ep2) + ND_PRINT("..."); + return cp; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_T)); + return NULL; +} + +static const u_char * +ikev2_p_print(netdissect_options *ndo, u_char tpay _U_, int pcount _U_, + const struct isakmp_gen *ext, u_int oprop_length, + const u_char *ep, int depth) +{ + const struct ikev2_p *p; + u_int prop_length; + uint8_t spi_size; + const u_char *cp; + int i; + int tcount; + u_char np; + u_int item_len; + + p = (const struct ikev2_p *)ext; + ND_TCHECK_SIZE(p); + + ikev2_pay_print(ndo, NPSTR(ISAKMP_NPTYPE_P), GET_U_1(p->h.critical)); + + /* + * ikev2_sa_print() guarantees that this is >= 4. + */ + prop_length = oprop_length - 4; + ND_PRINT(" #%u protoid=%s transform=%u len=%u", + GET_U_1(p->p_no), PROTOIDSTR(GET_U_1(p->prot_id)), + GET_U_1(p->num_t), oprop_length); + cp = (const u_char *)(p + 1); + + spi_size = GET_U_1(p->spi_size); + if (spi_size) { + if (prop_length < spi_size) + goto toolong; + ND_PRINT(" spi="); + if (!rawprint(ndo, (const uint8_t *)cp, spi_size)) + goto trunc; + cp += spi_size; + prop_length -= spi_size; + } + + /* + * Print the transforms. + */ + tcount = 0; + for (np = ISAKMP_NPTYPE_T; np != 0; np = GET_U_1(ext->np)) { + tcount++; + ext = (const struct isakmp_gen *)cp; + if (prop_length < sizeof(*ext)) + goto toolong; + ND_TCHECK_SIZE(ext); + + /* + * Since we can't have a payload length of less than 4 bytes, + * we need to bail out here if the generic header is nonsensical + * or truncated, otherwise we could loop forever processing + * zero-length items or otherwise misdissect the packet. + */ + item_len = GET_BE_U_2(ext->len); + if (item_len <= 4) + goto trunc; + + if (prop_length < item_len) + goto toolong; + ND_TCHECK_LEN(cp, item_len); + + depth++; + ND_PRINT("\n"); + for (i = 0; i < depth; i++) + ND_PRINT(" "); + ND_PRINT("("); + if (np == ISAKMP_NPTYPE_T) { + cp = ikev2_t_print(ndo, tcount, ext, item_len, ep); + if (cp == NULL) { + /* error, already reported */ + return NULL; + } + } else { + ND_PRINT("%s", NPSTR(np)); + cp += item_len; + } + ND_PRINT(")"); + depth--; + prop_length -= item_len; + } + return cp; +toolong: + /* + * Skip the rest of the proposal. + */ + cp += prop_length; + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_P)); + return cp; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_P)); + return NULL; +} + +static const u_char * +ikev2_sa_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext1, + u_int osa_length, const u_char *ep, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth) +{ + const struct isakmp_gen *ext; + u_int sa_length; + const u_char *cp; + int i; + int pcount; + u_char np; + u_int item_len; + + ND_TCHECK_SIZE(ext1); + ikev2_pay_print(ndo, "sa", GET_U_1(ext1->critical)); + + /* + * ikev2_sub0_print() guarantees that this is >= 4. + */ + osa_length= GET_BE_U_2(ext1->len); + sa_length = osa_length - 4; + ND_PRINT(" len=%u", sa_length); + + /* + * Print the payloads. + */ + cp = (const u_char *)(ext1 + 1); + pcount = 0; + for (np = ISAKMP_NPTYPE_P; np != 0; np = GET_U_1(ext->np)) { + pcount++; + ext = (const struct isakmp_gen *)cp; + if (sa_length < sizeof(*ext)) + goto toolong; + ND_TCHECK_SIZE(ext); + + /* + * Since we can't have a payload length of less than 4 bytes, + * we need to bail out here if the generic header is nonsensical + * or truncated, otherwise we could loop forever processing + * zero-length items or otherwise misdissect the packet. + */ + item_len = GET_BE_U_2(ext->len); + if (item_len <= 4) + goto trunc; + + if (sa_length < item_len) + goto toolong; + ND_TCHECK_LEN(cp, item_len); + + depth++; + ND_PRINT("\n"); + for (i = 0; i < depth; i++) + ND_PRINT(" "); + ND_PRINT("("); + if (np == ISAKMP_NPTYPE_P) { + cp = ikev2_p_print(ndo, np, pcount, ext, item_len, + ep, depth); + if (cp == NULL) { + /* error, already reported */ + return NULL; + } + } else { + ND_PRINT("%s", NPSTR(np)); + cp += item_len; + } + ND_PRINT(")"); + depth--; + sa_length -= item_len; + } + return cp; +toolong: + /* + * Skip the rest of the SA. + */ + cp += sa_length; + ND_PRINT(" [|%s]", NPSTR(tpay)); + return cp; +trunc: + ND_PRINT(" [|%s]", NPSTR(tpay)); + return NULL; +} + +static const u_char * +ikev2_ke_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep _U_, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + const struct ikev2_ke *k; + + k = (const struct ikev2_ke *)ext; + ND_TCHECK_SIZE(k); + ikev2_pay_print(ndo, NPSTR(tpay), GET_U_1(k->h.critical)); + + if (item_len < 8) { + ND_PRINT(" len=%u < 8", item_len); + return (const u_char *)ext + item_len; + } + ND_PRINT(" len=%u group=%s", item_len - 8, + STR_OR_ID(GET_BE_U_2(k->ke_group), dh_p_map)); + + if (2 < ndo->ndo_vflag && 8 < item_len) { + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(k + 1), item_len - 8)) + goto trunc; + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(tpay)); + return NULL; +} + +static const u_char * +ikev2_ID_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep _U_, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + const struct ikev2_id *idp; + u_int idtype_len, i; + unsigned int dumpascii, dumphex; + const unsigned char *typedata; + + idp = (const struct ikev2_id *)ext; + ND_TCHECK_SIZE(idp); + ikev2_pay_print(ndo, NPSTR(tpay), GET_U_1(idp->h.critical)); + + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" len=%u", item_len - 4); + if (2 < ndo->ndo_vflag && 4 < item_len) { + /* Print the entire payload in hex */ + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4)) + goto trunc; + } + + idtype_len =item_len - sizeof(struct ikev2_id); + dumpascii = 0; + dumphex = 0; + typedata = (const unsigned char *)(ext)+sizeof(struct ikev2_id); + + switch(GET_U_1(idp->type)) { + case ID_IPV4_ADDR: + ND_PRINT(" ipv4:"); + dumphex=1; + break; + case ID_FQDN: + ND_PRINT(" fqdn:"); + dumpascii=1; + break; + case ID_RFC822_ADDR: + ND_PRINT(" rfc822:"); + dumpascii=1; + break; + case ID_IPV6_ADDR: + ND_PRINT(" ipv6:"); + dumphex=1; + break; + case ID_DER_ASN1_DN: + ND_PRINT(" dn:"); + dumphex=1; + break; + case ID_DER_ASN1_GN: + ND_PRINT(" gn:"); + dumphex=1; + break; + case ID_KEY_ID: + ND_PRINT(" keyid:"); + dumphex=1; + break; + } + + if(dumpascii) { + ND_TCHECK_LEN(typedata, idtype_len); + for(i=0; i<idtype_len; i++) { + if(ND_ASCII_ISPRINT(GET_U_1(typedata + i))) { + ND_PRINT("%c", GET_U_1(typedata + i)); + } else { + ND_PRINT("."); + } + } + } + if(dumphex) { + if (!rawprint(ndo, (const uint8_t *)typedata, idtype_len)) + goto trunc; + } + + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(tpay)); + return NULL; +} + +static const u_char * +ikev2_cert_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep _U_, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + return ikev2_gen_print(ndo, tpay, ext, item_len); +} + +static const u_char * +ikev2_cr_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep _U_, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + return ikev2_gen_print(ndo, tpay, ext, item_len); +} + +static const u_char * +ikev2_auth_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + const struct ikev2_auth *p; + const char *v2_auth[]={ "invalid", "rsasig", + "shared-secret", "dsssig" }; + const u_char *authdata = (const u_char *)ext + sizeof(struct ikev2_auth); + + ND_TCHECK_LEN(ext, sizeof(struct ikev2_auth)); + p = (const struct ikev2_auth *)ext; + ikev2_pay_print(ndo, NPSTR(tpay), GET_U_1(p->h.critical)); + + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" len=%u method=%s", item_len-4, + STR_OR_ID(GET_U_1(p->auth_method), v2_auth)); + if (item_len > 4) { + if (ndo->ndo_vflag > 1) { + ND_PRINT(" authdata=("); + if (!rawprint(ndo, (const uint8_t *)authdata, item_len - sizeof(struct ikev2_auth))) + goto trunc; + ND_PRINT(") "); + } else if (ndo->ndo_vflag) { + if (!ike_show_somedata(ndo, authdata, ep)) + goto trunc; + } + } + + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(tpay)); + return NULL; +} + +static const u_char * +ikev2_nonce_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + ND_TCHECK_SIZE(ext); + ikev2_pay_print(ndo, "nonce", GET_U_1(ext->critical)); + + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" len=%u", item_len - 4); + if (1 < ndo->ndo_vflag && 4 < item_len) { + ND_PRINT(" nonce=("); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4)) + goto trunc; + ND_PRINT(") "); + } else if(ndo->ndo_vflag && 4 < item_len) { + if(!ike_show_somedata(ndo, (const u_char *)(ext+1), ep)) goto trunc; + } + + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(tpay)); + return NULL; +} + +/* notify payloads */ +static const u_char * +ikev2_n_print(netdissect_options *ndo, u_char tpay _U_, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + const struct ikev2_n *p; + uint16_t type; + uint8_t spi_size; + const u_char *cp; + u_char showspi, showsomedata; + const char *notify_name; + + p = (const struct ikev2_n *)ext; + ND_TCHECK_SIZE(p); + ikev2_pay_print(ndo, NPSTR(ISAKMP_NPTYPE_N), GET_U_1(p->h.critical)); + + showspi = 1; + showsomedata=0; + notify_name=NULL; + + ND_PRINT(" prot_id=%s", PROTOIDSTR(GET_U_1(p->prot_id))); + + type = GET_BE_U_2(p->type); + + /* notify space is annoying sparse */ + switch(type) { + case IV2_NOTIFY_UNSUPPORTED_CRITICAL_PAYLOAD: + notify_name = "unsupported_critical_payload"; + showspi = 0; + break; + + case IV2_NOTIFY_INVALID_IKE_SPI: + notify_name = "invalid_ike_spi"; + showspi = 1; + break; + + case IV2_NOTIFY_INVALID_MAJOR_VERSION: + notify_name = "invalid_major_version"; + showspi = 0; + break; + + case IV2_NOTIFY_INVALID_SYNTAX: + notify_name = "invalid_syntax"; + showspi = 1; + break; + + case IV2_NOTIFY_INVALID_MESSAGE_ID: + notify_name = "invalid_message_id"; + showspi = 1; + break; + + case IV2_NOTIFY_INVALID_SPI: + notify_name = "invalid_spi"; + showspi = 1; + break; + + case IV2_NOTIFY_NO_PROPOSAL_CHOSEN: + notify_name = "no_protocol_chosen"; + showspi = 1; + break; + + case IV2_NOTIFY_INVALID_KE_PAYLOAD: + notify_name = "invalid_ke_payload"; + showspi = 1; + break; + + case IV2_NOTIFY_AUTHENTICATION_FAILED: + notify_name = "authentication_failed"; + showspi = 1; + break; + + case IV2_NOTIFY_SINGLE_PAIR_REQUIRED: + notify_name = "single_pair_required"; + showspi = 1; + break; + + case IV2_NOTIFY_NO_ADDITIONAL_SAS: + notify_name = "no_additional_sas"; + showspi = 0; + break; + + case IV2_NOTIFY_INTERNAL_ADDRESS_FAILURE: + notify_name = "internal_address_failure"; + showspi = 0; + break; + + case IV2_NOTIFY_FAILED_CP_REQUIRED: + notify_name = "failed:cp_required"; + showspi = 0; + break; + + case IV2_NOTIFY_INVALID_SELECTORS: + notify_name = "invalid_selectors"; + showspi = 0; + break; + + case IV2_NOTIFY_INITIAL_CONTACT: + notify_name = "initial_contact"; + showspi = 0; + break; + + case IV2_NOTIFY_SET_WINDOW_SIZE: + notify_name = "set_window_size"; + showspi = 0; + break; + + case IV2_NOTIFY_ADDITIONAL_TS_POSSIBLE: + notify_name = "additional_ts_possible"; + showspi = 0; + break; + + case IV2_NOTIFY_IPCOMP_SUPPORTED: + notify_name = "ipcomp_supported"; + showspi = 0; + break; + + case IV2_NOTIFY_NAT_DETECTION_SOURCE_IP: + notify_name = "nat_detection_source_ip"; + showspi = 1; + break; + + case IV2_NOTIFY_NAT_DETECTION_DESTINATION_IP: + notify_name = "nat_detection_destination_ip"; + showspi = 1; + break; + + case IV2_NOTIFY_COOKIE: + notify_name = "cookie"; + showspi = 1; + showsomedata= 1; + break; + + case IV2_NOTIFY_USE_TRANSPORT_MODE: + notify_name = "use_transport_mode"; + showspi = 0; + break; + + case IV2_NOTIFY_HTTP_CERT_LOOKUP_SUPPORTED: + notify_name = "http_cert_lookup_supported"; + showspi = 0; + break; + + case IV2_NOTIFY_REKEY_SA: + notify_name = "rekey_sa"; + showspi = 1; + break; + + case IV2_NOTIFY_ESP_TFC_PADDING_NOT_SUPPORTED: + notify_name = "tfc_padding_not_supported"; + showspi = 0; + break; + + case IV2_NOTIFY_NON_FIRST_FRAGMENTS_ALSO: + notify_name = "non_first_fragment_also"; + showspi = 0; + break; + + default: + if (type < 8192) { + notify_name="error"; + } else if(type < 16384) { + notify_name="private-error"; + } else if(type < 40960) { + notify_name="status"; + } else { + notify_name="private-status"; + } + } + + if(notify_name) { + ND_PRINT(" type=%u(%s)", type, notify_name); + } + + + spi_size = GET_U_1(p->spi_size); + if (showspi && spi_size) { + ND_PRINT(" spi="); + if (!rawprint(ndo, (const uint8_t *)(p + 1), spi_size)) + goto trunc; + } + + cp = (const u_char *)(p + 1) + spi_size; + + if (cp < ep) { + if (ndo->ndo_vflag > 3 || (showsomedata && ep-cp < 30)) { + ND_PRINT(" data=("); + if (!rawprint(ndo, (const uint8_t *)(cp), ep - cp)) + goto trunc; + + ND_PRINT(")"); + } else if (showsomedata) { + if (!ike_show_somedata(ndo, cp, ep)) + goto trunc; + } + } + + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(ISAKMP_NPTYPE_N)); + return NULL; +} + +static const u_char * +ikev2_d_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep _U_, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + return ikev2_gen_print(ndo, tpay, ext, item_len); +} + +static const u_char * +ikev2_vid_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep _U_, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + const u_char *vid; + u_int i, len; + + ND_TCHECK_SIZE(ext); + ikev2_pay_print(ndo, NPSTR(tpay), GET_U_1(ext->critical)); + + /* + * Our caller has ensured that the length is >= 4. + */ + ND_PRINT(" len=%u vid=", item_len - 4); + + vid = (const u_char *)(ext+1); + len = item_len - 4; + ND_TCHECK_LEN(vid, len); + for(i=0; i<len; i++) { + if(ND_ASCII_ISPRINT(GET_U_1(vid + i))) + ND_PRINT("%c", GET_U_1(vid + i)); + else ND_PRINT("."); + } + if (2 < ndo->ndo_vflag && 4 < len) { + /* Print the entire payload in hex */ + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4)) + goto trunc; + } + return (const u_char *)ext + item_len; +trunc: + ND_PRINT(" [|%s]", NPSTR(tpay)); + return NULL; +} + +static const u_char * +ikev2_TS_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep _U_, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + return ikev2_gen_print(ndo, tpay, ext, item_len); +} + +static const u_char * +ikev2_e_print(netdissect_options *ndo, +#ifndef HAVE_LIBCRYPTO + _U_ +#endif + const struct isakmp *base, + u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep _U_, +#ifndef HAVE_LIBCRYPTO + _U_ +#endif + uint32_t phase, +#ifndef HAVE_LIBCRYPTO + _U_ +#endif + uint32_t doi, +#ifndef HAVE_LIBCRYPTO + _U_ +#endif + uint32_t proto, +#ifndef HAVE_LIBCRYPTO + _U_ +#endif + int depth) +{ + const u_char *dat; + u_int dlen; +#ifdef HAVE_LIBCRYPTO + uint8_t np; +#endif + + ND_TCHECK_SIZE(ext); + ikev2_pay_print(ndo, NPSTR(tpay), GET_U_1(ext->critical)); + + dlen = item_len-4; + + ND_PRINT(" len=%u", dlen); + if (2 < ndo->ndo_vflag && 4 < dlen) { + ND_PRINT(" "); + if (!rawprint(ndo, (const uint8_t *)(ext + 1), dlen)) + goto trunc; + } + + dat = (const u_char *)(ext+1); + ND_TCHECK_LEN(dat, dlen); + +#ifdef HAVE_LIBCRYPTO + np = GET_U_1(ext->np); + + /* try to decrypt it! */ + if(esp_decrypt_buffer_by_ikev2_print(ndo, + GET_U_1(base->flags) & ISAKMP_FLAG_I, + base->i_ck, base->r_ck, + dat, dat+dlen)) { + + ext = (const struct isakmp_gen *)ndo->ndo_packetp; + + /* got it decrypted, print stuff inside. */ + ikev2_sub_print(ndo, base, np, ext, + ndo->ndo_snapend, phase, doi, proto, depth+1); + + /* + * esp_decrypt_buffer_by_ikev2_print pushed information + * on the buffer stack; we're done with the buffer, so + * pop it (which frees the buffer) + */ + nd_pop_packet_info(ndo); + } +#endif + + + /* always return NULL, because E must be at end, and NP refers + * to what was inside. + */ + return NULL; +trunc: + ND_PRINT(" [|%s]", NPSTR(tpay)); + return NULL; +} + +static const u_char * +ikev2_cp_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep _U_, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + return ikev2_gen_print(ndo, tpay, ext, item_len); +} + +static const u_char * +ikev2_eap_print(netdissect_options *ndo, u_char tpay, + const struct isakmp_gen *ext, + u_int item_len, const u_char *ep _U_, + uint32_t phase _U_, uint32_t doi _U_, + uint32_t proto _U_, int depth _U_) +{ + return ikev2_gen_print(ndo, tpay, ext, item_len); +} + +static const u_char * +ike_sub0_print(netdissect_options *ndo, + u_char np, const struct isakmp_gen *ext, const u_char *ep, + + uint32_t phase, uint32_t doi, uint32_t proto, int depth) +{ + const u_char *cp; + u_int item_len; + + cp = (const u_char *)ext; + ND_TCHECK_SIZE(ext); + + /* + * Since we can't have a payload length of less than 4 bytes, + * we need to bail out here if the generic header is nonsensical + * or truncated, otherwise we could loop forever processing + * zero-length items or otherwise misdissect the packet. + */ + item_len = GET_BE_U_2(ext->len); + if (item_len <= 4) + return NULL; + + if (NPFUNC(np)) { + /* + * XXX - what if item_len is too short, or too long, + * for this payload type? + */ + cp = (*npfunc[np])(ndo, np, ext, item_len, ep, phase, doi, proto, depth); + } else { + ND_PRINT("%s", NPSTR(np)); + cp += item_len; + } + + return cp; +trunc: + nd_print_trunc(ndo); + return NULL; +} + +static const u_char * +ikev1_sub_print(netdissect_options *ndo, + u_char np, const struct isakmp_gen *ext, const u_char *ep, + uint32_t phase, uint32_t doi, uint32_t proto, int depth) +{ + const u_char *cp; + int i; + u_int item_len; + + cp = (const u_char *)ext; + + while (np) { + ND_TCHECK_SIZE(ext); + + item_len = GET_BE_U_2(ext->len); + ND_TCHECK_LEN(ext, item_len); + + depth++; + ND_PRINT("\n"); + for (i = 0; i < depth; i++) + ND_PRINT(" "); + ND_PRINT("("); + cp = ike_sub0_print(ndo, np, ext, ep, phase, doi, proto, depth); + ND_PRINT(")"); + depth--; + + if (cp == NULL) { + /* Zero-length subitem */ + return NULL; + } + + np = GET_U_1(ext->np); + ext = (const struct isakmp_gen *)cp; + } + return cp; +trunc: + ND_PRINT(" [|%s]", NPSTR(np)); + return NULL; +} + +static char * +numstr(u_int x) +{ + static char buf[20]; + snprintf(buf, sizeof(buf), "#%u", x); + return buf; +} + +static void +ikev1_print(netdissect_options *ndo, + const u_char *bp, u_int length, + const u_char *bp2, const struct isakmp *base) +{ + const struct isakmp *p; + const u_char *ep; + u_int flags; + u_char np; + int i; + u_int phase; + + p = (const struct isakmp *)bp; + ep = ndo->ndo_snapend; + + phase = (GET_BE_U_4(base->msgid) == 0) ? 1 : 2; + if (phase == 1) + ND_PRINT(" phase %u", phase); + else + ND_PRINT(" phase %u/others", phase); + + i = cookie_find(&base->i_ck); + if (i < 0) { + if (iszero(ndo, base->r_ck, sizeof(base->r_ck))) { + /* the first packet */ + ND_PRINT(" I"); + if (bp2) + cookie_record(ndo, &base->i_ck, bp2); + } else + ND_PRINT(" ?"); + } else { + if (bp2 && cookie_isinitiator(ndo, i, bp2)) + ND_PRINT(" I"); + else if (bp2 && cookie_isresponder(ndo, i, bp2)) + ND_PRINT(" R"); + else + ND_PRINT(" ?"); + } + + ND_PRINT(" %s", ETYPESTR(GET_U_1(base->etype))); + flags = GET_U_1(base->flags); + if (flags) { + ND_PRINT("[%s%s]", flags & ISAKMP_FLAG_E ? "E" : "", + flags & ISAKMP_FLAG_C ? "C" : ""); + } + + if (ndo->ndo_vflag) { + const struct isakmp_gen *ext; + + ND_PRINT(":"); + + np = GET_U_1(base->np); + + /* regardless of phase... */ + if (flags & ISAKMP_FLAG_E) { + /* + * encrypted, nothing we can do right now. + * we hope to decrypt the packet in the future... + */ + ND_PRINT(" [encrypted %s]", NPSTR(np)); + goto done; + } + + CHECKLEN(p + 1, np); + ext = (const struct isakmp_gen *)(p + 1); + ikev1_sub_print(ndo, np, ext, ep, phase, 0, 0, 0); + } + +done: + if (ndo->ndo_vflag) { + if (GET_BE_U_4(base->len) != length) { + ND_PRINT(" (len mismatch: isakmp %u/ip %u)", + GET_BE_U_4(base->len), length); + } + } +} + +static const u_char * +ikev2_sub0_print(netdissect_options *ndo, const struct isakmp *base, + u_char np, + const struct isakmp_gen *ext, const u_char *ep, + uint32_t phase, uint32_t doi, uint32_t proto, int depth) +{ + const u_char *cp; + u_int item_len; + + cp = (const u_char *)ext; + ND_TCHECK_SIZE(ext); + + /* + * Since we can't have a payload length of less than 4 bytes, + * we need to bail out here if the generic header is nonsensical + * or truncated, otherwise we could loop forever processing + * zero-length items or otherwise misdissect the packet. + */ + item_len = GET_BE_U_2(ext->len); + if (item_len <= 4) + return NULL; + + if (np == ISAKMP_NPTYPE_v2E) { + cp = ikev2_e_print(ndo, base, np, ext, item_len, + ep, phase, doi, proto, depth); + } else if (NPFUNC(np)) { + /* + * XXX - what if item_len is too short, or too long, + * for this payload type? + */ + cp = (*npfunc[np])(ndo, np, ext, item_len, + ep, phase, doi, proto, depth); + } else { + ND_PRINT("%s", NPSTR(np)); + cp += item_len; + } + + return cp; +trunc: + nd_print_trunc(ndo); + return NULL; +} + +static const u_char * +ikev2_sub_print(netdissect_options *ndo, + const struct isakmp *base, + u_char np, const struct isakmp_gen *ext, const u_char *ep, + uint32_t phase, uint32_t doi, uint32_t proto, int depth) +{ + const u_char *cp; + int i; + + cp = (const u_char *)ext; + while (np) { + ND_TCHECK_SIZE(ext); + + ND_TCHECK_LEN(ext, GET_BE_U_2(ext->len)); + + depth++; + ND_PRINT("\n"); + for (i = 0; i < depth; i++) + ND_PRINT(" "); + ND_PRINT("("); + cp = ikev2_sub0_print(ndo, base, np, + ext, ep, phase, doi, proto, depth); + ND_PRINT(")"); + depth--; + + if (cp == NULL) { + /* Zero-length subitem */ + return NULL; + } + + np = GET_U_1(ext->np); + ext = (const struct isakmp_gen *)cp; + } + return cp; +trunc: + ND_PRINT(" [|%s]", NPSTR(np)); + return NULL; +} + +static void +ikev2_print(netdissect_options *ndo, + const u_char *bp, u_int length, + const u_char *bp2 _U_, const struct isakmp *base) +{ + const struct isakmp *p; + const u_char *ep; + uint8_t flags; + u_char np; + u_int phase; + + p = (const struct isakmp *)bp; + ep = ndo->ndo_snapend; + + phase = (GET_BE_U_4(base->msgid) == 0) ? 1 : 2; + if (phase == 1) + ND_PRINT(" parent_sa"); + else + ND_PRINT(" child_sa "); + + ND_PRINT(" %s", ETYPESTR(GET_U_1(base->etype))); + flags = GET_U_1(base->flags); + if (flags) { + ND_PRINT("[%s%s%s]", + flags & ISAKMP_FLAG_I ? "I" : "", + flags & ISAKMP_FLAG_V ? "V" : "", + flags & ISAKMP_FLAG_R ? "R" : ""); + } + + if (ndo->ndo_vflag) { + const struct isakmp_gen *ext; + + ND_PRINT(":"); + + np = GET_U_1(base->np); + + /* regardless of phase... */ + if (flags & ISAKMP_FLAG_E) { + /* + * encrypted, nothing we can do right now. + * we hope to decrypt the packet in the future... + */ + ND_PRINT(" [encrypted %s]", NPSTR(np)); + goto done; + } + + CHECKLEN(p + 1, np) + ext = (const struct isakmp_gen *)(p + 1); + ikev2_sub_print(ndo, base, np, ext, ep, phase, 0, 0, 0); + } + +done: + if (ndo->ndo_vflag) { + if (GET_BE_U_4(base->len) != length) { + ND_PRINT(" (len mismatch: isakmp %u/ip %u)", + GET_BE_U_4(base->len), length); + } + } +} + +void +isakmp_print(netdissect_options *ndo, + const u_char *bp, u_int length, + const u_char *bp2) +{ + const struct isakmp *p; + const u_char *ep; + u_int major, minor; + + ndo->ndo_protocol = "isakmp"; +#ifdef HAVE_LIBCRYPTO + /* initialize SAs */ + if (ndo->ndo_sa_list_head == NULL) { + if (ndo->ndo_espsecret) + esp_decodesecret_print(ndo); + } +#endif + + p = (const struct isakmp *)bp; + ep = ndo->ndo_snapend; + + if ((const struct isakmp *)ep < p + 1) { + nd_print_trunc(ndo); + return; + } + + ND_PRINT("isakmp"); + major = (GET_U_1(p->vers) & ISAKMP_VERS_MAJOR) + >> ISAKMP_VERS_MAJOR_SHIFT; + minor = (GET_U_1(p->vers) & ISAKMP_VERS_MINOR) + >> ISAKMP_VERS_MINOR_SHIFT; + + if (ndo->ndo_vflag) { + ND_PRINT(" %u.%u", major, minor); + } + + if (ndo->ndo_vflag) { + ND_PRINT(" msgid "); + hexprint(ndo, p->msgid, sizeof(p->msgid)); + } + + if (1 < ndo->ndo_vflag) { + ND_PRINT(" cookie "); + hexprint(ndo, p->i_ck, sizeof(p->i_ck)); + ND_PRINT("->"); + hexprint(ndo, p->r_ck, sizeof(p->r_ck)); + } + ND_PRINT(":"); + + switch(major) { + case IKEv1_MAJOR_VERSION: + ikev1_print(ndo, bp, length, bp2, p); + break; + + case IKEv2_MAJOR_VERSION: + ikev2_print(ndo, bp, length, bp2, p); + break; + } +} + +void +isakmp_rfc3948_print(netdissect_options *ndo, + const u_char *bp, u_int length, + const u_char *bp2, int ver, int fragmented, u_int ttl_hl) +{ + ndo->ndo_protocol = "isakmp_rfc3948"; + if(length == 1 && GET_U_1(bp)==0xff) { + ND_PRINT("isakmp-nat-keep-alive"); + return; + } + + if(length < 4) { + goto trunc; + } + + /* + * see if this is an IKE packet + */ + if (GET_BE_U_4(bp) == 0) { + ND_PRINT("NONESP-encap: "); + isakmp_print(ndo, bp+4, length-4, bp2); + return; + } + + /* must be an ESP packet */ + { + ND_PRINT("UDP-encap: "); + + esp_print(ndo, bp, length, bp2, ver, fragmented, ttl_hl); + + /* + * Either this has decrypted the payload and + * printed it, in which case there's nothing more + * to do, or it hasn't, in which case there's + * nothing more to do. + */ + return; + } + +trunc: + nd_print_trunc(ndo); +} |