1 /* $NetBSD: isakmp.h,v 1.4 2006/09/09 16:22:09 manu Exp $ */ 2 3 /* Id: isakmp.h,v 1.11 2005/04/25 22:19:39 manubsd Exp */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef _ISAKMP_H 35 #define _ISAKMP_H 36 37 /* refer to RFC 2408 */ 38 39 /* must include <netinet/in.h> first. */ 40 /* must include "isakmp_var.h" first. */ 41 42 #define INITIATOR 0 /* synonym sender */ 43 #define RESPONDER 1 /* synonym receiver */ 44 45 #define GENERATE 1 46 #define VALIDATE 0 47 48 /* 3.1 ISAKMP Header Format 49 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 50 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 51 ! Initiator ! 52 ! Cookie ! 53 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 54 ! Responder ! 55 ! Cookie ! 56 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 57 ! Next Payload ! MjVer ! MnVer ! Exchange Type ! Flags ! 58 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 59 ! Message ID ! 60 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 61 ! Length ! 62 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 63 */ 64 struct isakmp { 65 cookie_t i_ck; /* Initiator Cookie */ 66 cookie_t r_ck; /* Responder Cookie */ 67 u_int8_t np; /* Next Payload Type */ 68 u_int8_t v; 69 u_int8_t etype; /* Exchange Type */ 70 u_int8_t flags; /* Flags */ 71 u_int32_t msgid; 72 u_int32_t len; /* Length */ 73 } __attribute__((__packed__)); 74 75 /* Next Payload Type */ 76 #define ISAKMP_NPTYPE_NONE 0 /* NONE*/ 77 #define ISAKMP_NPTYPE_SA 1 /* Security Association */ 78 #define ISAKMP_NPTYPE_P 2 /* Proposal */ 79 #define ISAKMP_NPTYPE_T 3 /* Transform */ 80 #define ISAKMP_NPTYPE_KE 4 /* Key Exchange */ 81 #define ISAKMP_NPTYPE_ID 5 /* Identification */ 82 #define ISAKMP_NPTYPE_CERT 6 /* Certificate */ 83 #define ISAKMP_NPTYPE_CR 7 /* Certificate Request */ 84 #define ISAKMP_NPTYPE_HASH 8 /* Hash */ 85 #define ISAKMP_NPTYPE_SIG 9 /* Signature */ 86 #define ISAKMP_NPTYPE_NONCE 10 /* Nonce */ 87 #define ISAKMP_NPTYPE_N 11 /* Notification */ 88 #define ISAKMP_NPTYPE_D 12 /* Delete */ 89 #define ISAKMP_NPTYPE_VID 13 /* Vendor ID */ 90 #define ISAKMP_NPTYPE_ATTR 14 /* Attribute */ 91 92 93 /* NAT-T draft-ietf-ipsec-nat-t-ike-05 and later */ 94 /* XXX conflicts with values assigned to RFC 3547 */ 95 #define ISAKMP_NPTYPE_NATD_BADDRAFT 15 /* NAT Discovery */ 96 #define ISAKMP_NPTYPE_NATOA_BADDRAFT 16 /* NAT Original Address */ 97 98 99 /* NAT-T RFC */ 100 #define ISAKMP_NPTYPE_NATD_RFC 20 /* NAT Discovery */ 101 #define ISAKMP_NPTYPE_NATOA_RFC 21 /* NAT Original Address */ 102 103 /* NAT-T up to draft-ietf-ipsec-nat-t-ike-04 */ 104 #define ISAKMP_NPTYPE_NATD_DRAFT 130 /* NAT Discovery */ 105 #define ISAKMP_NPTYPE_NATOA_DRAFT 131 /* NAT Original Address */ 106 107 /* Frag does not seems to be documented */ 108 #define ISAKMP_NPTYPE_FRAG 132 /* IKE fragmentation payload */ 109 110 #define ISAKMP_NPTYPE_MAX 17 111 /* 128 - 255 Private Use */ 112 113 /* 114 * The following are valid when the Vendor ID is one of the 115 * following: 116 * 117 * MD5("A GSS-API Authentication Method for IKE") 118 * MD5("GSSAPI") (recognized by Windows 2000) 119 * MD5("MS NT5 ISAKMPOAKLEY") (sent by Windows 2000) 120 * 121 * See draft-ietf-ipsec-isakmp-gss-auth-06.txt. 122 */ 123 #define ISAKMP_NPTYPE_GSS 129 /* GSS token */ 124 125 #define ISAKMP_MAJOR_VERSION 1 126 #define ISAKMP_MINOR_VERSION 0 127 #define ISAKMP_VERSION_NUMBER 0x10 128 #define ISAKMP_GETMAJORV(v) (((v) & 0xf0) >> 4) 129 #define ISAKMP_SETMAJORV(v, m) ((v) = ((v) & 0x0f) | (((m) << 4) & 0xf0)) 130 #define ISAKMP_GETMINORV(v) ((v) & 0x0f) 131 #define ISAKMP_SETMINORV(v, m) ((v) = ((v) & 0xf0) | ((m) & 0x0f)) 132 133 /* Exchange Type */ 134 #define ISAKMP_ETYPE_NONE 0 /* NONE */ 135 #define ISAKMP_ETYPE_BASE 1 /* Base */ 136 #define ISAKMP_ETYPE_IDENT 2 /* Identity Proteciton */ 137 #define ISAKMP_ETYPE_AUTH 3 /* Authentication Only */ 138 #define ISAKMP_ETYPE_AGG 4 /* Aggressive */ 139 #define ISAKMP_ETYPE_INFO 5 /* Informational */ 140 #define ISAKMP_ETYPE_CFG 6 /* Mode config */ 141 /* Additional Exchange Type */ 142 #define ISAKMP_ETYPE_QUICK 32 /* Quick Mode */ 143 #define ISAKMP_ETYPE_NEWGRP 33 /* New group Mode */ 144 #define ISAKMP_ETYPE_ACKINFO 34 /* Acknowledged Informational */ 145 146 /* Flags */ 147 #define ISAKMP_FLAG_E 0x01 /* Encryption Bit */ 148 #define ISAKMP_FLAG_C 0x02 /* Commit Bit */ 149 #define ISAKMP_FLAG_A 0x04 /* Authentication Only Bit */ 150 151 /* 3.2 Payload Generic Header 152 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 1 153 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 154 ! Next Payload ! RESERVED ! Payload Length ! 155 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 156 */ 157 struct isakmp_gen { 158 u_int8_t np; /* Next Payload */ 159 u_int8_t reserved; /* RESERVED, unused, must set to 0 */ 160 u_int16_t len; /* Payload Length */ 161 } __attribute__((__packed__)); 162 163 /* 3.3 Data Attributes 164 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 1 165 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 166 !A! Attribute Type ! AF=0 Attribute Length ! 167 !F! ! AF=1 Attribute Value ! 168 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 169 . AF=0 Attribute Value . 170 . AF=1 Not Transmitted . 171 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 172 */ 173 struct isakmp_data { 174 u_int16_t type; /* defined by DOI-spec, and Attribute Format */ 175 u_int16_t lorv; /* if f equal 1, Attribute Length */ 176 /* if f equal 0, Attribute Value */ 177 /* if f equal 1, Attribute Value */ 178 } __attribute__((__packed__)); 179 #define ISAKMP_GEN_TLV 0x0000 180 #define ISAKMP_GEN_TV 0x8000 181 /* mask for type of attribute format */ 182 #define ISAKMP_GEN_MASK 0x8000 183 184 #if 0 185 /* MAY NOT be used, because of being defined in ipsec-doi. */ 186 /* 3.4 Security Association Payload */ 187 struct isakmp_pl_sa { 188 struct isakmp_gen h; 189 u_int32_t doi; /* Domain of Interpretation */ 190 u_int32_t sit; /* Situation */ 191 } __attribute__((__packed__)); 192 #endif 193 194 /* 3.5 Proposal Payload */ 195 /* 196 The value of the next payload field MUST only contain the value "2" 197 or "0". If there are additional Proposal payloads in the message, 198 then this field will be 2. If the current Proposal payload is the 199 last within the security association proposal, then this field will 200 be 0. 201 */ 202 struct isakmp_pl_p { 203 struct isakmp_gen h; 204 u_int8_t p_no; /* Proposal # */ 205 u_int8_t proto_id; /* Protocol */ 206 u_int8_t spi_size; /* SPI Size */ 207 u_int8_t num_t; /* Number of Transforms */ 208 /* SPI */ 209 } __attribute__((__packed__)); 210 211 /* 3.6 Transform Payload */ 212 /* 213 The value of the next payload field MUST only contain the value "3" 214 or "0". If there are additional Transform payloads in the proposal, 215 then this field will be 3. If the current Transform payload is the 216 last within the proposal, then this field will be 0. 217 */ 218 struct isakmp_pl_t { 219 struct isakmp_gen h; 220 u_int8_t t_no; /* Transform # */ 221 u_int8_t t_id; /* Transform-Id */ 222 u_int16_t reserved; /* RESERVED2 */ 223 /* SA Attributes */ 224 } __attribute__((__packed__)); 225 226 /* 3.7 Key Exchange Payload */ 227 struct isakmp_pl_ke { 228 struct isakmp_gen h; 229 /* Key Exchange Data */ 230 } __attribute__((__packed__)); 231 232 #if 0 233 /* NOTE: MUST NOT use because of being defined in ipsec-doi instead them. */ 234 /* 3.8 Identification Payload */ 235 struct isakmp_pl_id { 236 struct isakmp_gen h; 237 union { 238 u_int8_t id_type; /* ID Type */ 239 u_int32_t doi_data; /* DOI Specific ID Data */ 240 } d; 241 /* Identification Data */ 242 } __attribute__((__packed__)); 243 /* A.4 ISAKMP Identification Type Values */ 244 #define ISAKMP_ID_IPV4_ADDR 0 245 #define ISAKMP_ID_IPV4_ADDR_SUBNET 1 246 #define ISAKMP_ID_IPV6_ADDR 2 247 #define ISAKMP_ID_IPV6_ADDR_SUBNET 3 248 #endif 249 250 /* 3.9 Certificate Payload */ 251 struct isakmp_pl_cert { 252 struct isakmp_gen h; 253 /* 254 * Encoding type of 1 octet follows immediately, 255 * variable length CERT data follows encoding type. 256 */ 257 } __attribute__((__packed__)); 258 259 /* Certificate Type */ 260 #define ISAKMP_CERT_NONE 0 261 #define ISAKMP_CERT_PKCS7 1 262 #define ISAKMP_CERT_PGP 2 263 #define ISAKMP_CERT_DNS 3 264 #define ISAKMP_CERT_X509SIGN 4 265 #define ISAKMP_CERT_X509KE 5 266 #define ISAKMP_CERT_KERBEROS 6 267 #define ISAKMP_CERT_CRL 7 268 #define ISAKMP_CERT_ARL 8 269 #define ISAKMP_CERT_SPKI 9 270 #define ISAKMP_CERT_X509ATTR 10 271 #define ISAKMP_CERT_PLAINRSA 11 272 273 /* the method to get peers certificate */ 274 #define ISAKMP_GETCERT_PAYLOAD 1 275 #define ISAKMP_GETCERT_LOCALFILE 2 276 #define ISAKMP_GETCERT_DNS 3 277 278 /* 3.10 Certificate Request Payload */ 279 struct isakmp_pl_cr { 280 struct isakmp_gen h; 281 u_int8_t num_cert; /* # Cert. Types */ 282 /* 283 Certificate Types (variable length) 284 -- Contains a list of the types of certificates requested, 285 sorted in order of preference. Each individual certificate 286 type is 1 octet. This field is NOT required. 287 */ 288 /* # Certificate Authorities (1 octet) */ 289 /* Certificate Authorities (variable length) */ 290 } __attribute__((__packed__)); 291 292 /* 3.11 Hash Payload */ 293 struct isakmp_pl_hash { 294 struct isakmp_gen h; 295 /* Hash Data */ 296 } __attribute__((__packed__)); 297 298 /* 3.12 Signature Payload */ 299 struct isakmp_pl_sig { 300 struct isakmp_gen h; 301 /* Signature Data */ 302 } __attribute__((__packed__)); 303 304 /* 3.13 Nonce Payload */ 305 struct isakmp_pl_nonce { 306 struct isakmp_gen h; 307 /* Nonce Data */ 308 } __attribute__((__packed__)); 309 310 /* 3.14 Notification Payload */ 311 struct isakmp_pl_n { 312 struct isakmp_gen h; 313 u_int32_t doi; /* Domain of Interpretation */ 314 u_int8_t proto_id; /* Protocol-ID */ 315 u_int8_t spi_size; /* SPI Size */ 316 u_int16_t type; /* Notify Message Type */ 317 /* SPI */ 318 /* Notification Data */ 319 } __attribute__((__packed__)); 320 321 /* 3.14.1 Notify Message Types */ 322 /* NOTIFY MESSAGES - ERROR TYPES */ 323 #define ISAKMP_NTYPE_INVALID_PAYLOAD_TYPE 1 324 #define ISAKMP_NTYPE_DOI_NOT_SUPPORTED 2 325 #define ISAKMP_NTYPE_SITUATION_NOT_SUPPORTED 3 326 #define ISAKMP_NTYPE_INVALID_COOKIE 4 327 #define ISAKMP_NTYPE_INVALID_MAJOR_VERSION 5 328 #define ISAKMP_NTYPE_INVALID_MINOR_VERSION 6 329 #define ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE 7 330 #define ISAKMP_NTYPE_INVALID_FLAGS 8 331 #define ISAKMP_NTYPE_INVALID_MESSAGE_ID 9 332 #define ISAKMP_NTYPE_INVALID_PROTOCOL_ID 10 333 #define ISAKMP_NTYPE_INVALID_SPI 11 334 #define ISAKMP_NTYPE_INVALID_TRANSFORM_ID 12 335 #define ISAKMP_NTYPE_ATTRIBUTES_NOT_SUPPORTED 13 336 #define ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN 14 337 #define ISAKMP_NTYPE_BAD_PROPOSAL_SYNTAX 15 338 #define ISAKMP_NTYPE_PAYLOAD_MALFORMED 16 339 #define ISAKMP_NTYPE_INVALID_KEY_INFORMATION 17 340 #define ISAKMP_NTYPE_INVALID_ID_INFORMATION 18 341 #define ISAKMP_NTYPE_INVALID_CERT_ENCODING 19 342 #define ISAKMP_NTYPE_INVALID_CERTIFICATE 20 343 #define ISAKMP_NTYPE_BAD_CERT_REQUEST_SYNTAX 21 344 #define ISAKMP_NTYPE_INVALID_CERT_AUTHORITY 22 345 #define ISAKMP_NTYPE_INVALID_HASH_INFORMATION 23 346 #define ISAKMP_NTYPE_AUTHENTICATION_FAILED 24 347 #define ISAKMP_NTYPE_INVALID_SIGNATURE 25 348 #define ISAKMP_NTYPE_ADDRESS_NOTIFICATION 26 349 #define ISAKMP_NTYPE_NOTIFY_SA_LIFETIME 27 350 #define ISAKMP_NTYPE_CERTIFICATE_UNAVAILABLE 28 351 #define ISAKMP_NTYPE_UNSUPPORTED_EXCHANGE_TYPE 29 352 #define ISAKMP_NTYPE_UNEQUAL_PAYLOAD_LENGTHS 30 353 #define ISAKMP_NTYPE_MINERROR 1 354 #define ISAKMP_NTYPE_MAXERROR 16383 355 /* NOTIFY MESSAGES - STATUS TYPES */ 356 #define ISAKMP_NTYPE_CONNECTED 16384 357 /* 4.6.3 IPSEC DOI Notify Message Types */ 358 #define ISAKMP_NTYPE_RESPONDER_LIFETIME 24576 359 #define ISAKMP_NTYPE_REPLAY_STATUS 24577 360 #define ISAKMP_NTYPE_INITIAL_CONTACT 24578 361 362 /* DPD */ 363 #define ISAKMP_NTYPE_R_U_THERE 36136 364 #define ISAKMP_NTYPE_R_U_THERE_ACK 36137 365 366 #define ISAKMP_NTYPE_HEARTBEAT 40503 367 368 /* using only to log */ 369 #define ISAKMP_LOG_RETRY_LIMIT_REACHED 65530 370 371 /* XXX means internal error but it's not reserved by any drafts... */ 372 #define ISAKMP_INTERNAL_ERROR -1 373 374 /* 3.15 Delete Payload */ 375 struct isakmp_pl_d { 376 struct isakmp_gen h; 377 u_int32_t doi; /* Domain of Interpretation */ 378 u_int8_t proto_id; /* Protocol-Id */ 379 u_int8_t spi_size; /* SPI Size */ 380 u_int16_t num_spi; /* # of SPIs */ 381 /* SPI(es) */ 382 } __attribute__((__packed__)); 383 384 struct payload_list { 385 struct payload_list *next, *prev; 386 vchar_t *payload; 387 int payload_type; 388 }; 389 390 391 /* See draft-ietf-ipsec-isakmp-mode-cfg-04.txt, 3.2 */ 392 struct isakmp_pl_attr { 393 struct isakmp_gen h; 394 u_int8_t type; /* Exchange type */ 395 u_int8_t res2; 396 u_int16_t id; /* Per transaction id */ 397 } __attribute__((__packed__)); 398 399 /* Exchange type */ 400 #define ISAKMP_CFG_REQUEST 1 401 #define ISAKMP_CFG_REPLY 2 402 #define ISAKMP_CFG_SET 3 403 #define ISAKMP_CFG_ACK 4 404 405 /* IKE fragmentation payload */ 406 struct isakmp_frag { 407 u_int16_t unknown0; /* always set to zero? */ 408 u_int16_t len; 409 u_int16_t unknown1; /* always set to 1? */ 410 u_int8_t index; 411 u_int8_t flags; 412 } __attribute__((__packed__)); 413 414 /* flags */ 415 #define ISAKMP_FRAG_LAST 1 416 417 /* DPD R-U-THERE / R-U-THERE-ACK Payload */ 418 struct isakmp_pl_ru { 419 struct isakmp_gen h; 420 u_int32_t doi; /* Domain of Interpretation */ 421 u_int8_t proto_id; /* Protocol-Id */ 422 u_int8_t spi_size; /* SPI Size */ 423 u_int16_t type; /* Notify type */ 424 cookie_t i_ck; /* Initiator Cookie */ 425 cookie_t r_ck; /* Responder cookie*/ 426 u_int32_t data; /* Notification data */ 427 } __attribute__((__packed__)); 428 429 #endif /* _ISAKMP_H */ 430
