racoon.tproj/isakmp.h

   1 /*      $KAME: isakmp.h,v 1.19 2001/04/11 06:11:55 sakane Exp $ */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 /* refer to RFC 2408 */
  33
  34 /* must include <netinet/in.h> first. */
  35 /* must include "isakmp_var.h" first. */
  36
  37 #define INITIATOR       0       /* synonym sender */
  38 #define RESPONDER       1       /* synonym receiver */
  39
  40 #define GENERATE        1
  41 #define VALIDATE        0
  42
  43 /* 3.1 ISAKMP Header Format
  44          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
  45         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  46         !                          Initiator                            !
  47         !                            Cookie                             !
  48         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  49         !                          Responder                            !
  50         !                            Cookie                             !
  51         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  52         !  Next Payload ! MjVer ! MnVer ! Exchange Type !     Flags     !
  53         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  54         !                          Message ID                           !
  55         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  56         !                            Length                             !
  57         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  58 */
  59 struct isakmp {
  60         cookie_t i_ck;          /* Initiator Cookie */
  61         cookie_t r_ck;          /* Responder Cookie */
  62         u_int8_t np;            /* Next Payload Type */
  63         u_int8_t v;
  64         u_int8_t etype;         /* Exchange Type */
  65         u_int8_t flags;         /* Flags */
  66         u_int32_t msgid;
  67         u_int32_t len;          /* Length */
  68 } __attribute__((__packed__));
  69
  70 /* Next Payload Type */
  71 #define ISAKMP_NPTYPE_NONE      0       /* NONE*/
  72 #define ISAKMP_NPTYPE_SA        1       /* Security Association */
  73 #define ISAKMP_NPTYPE_P         2       /* Proposal */
  74 #define ISAKMP_NPTYPE_T         3       /* Transform */
  75 #define ISAKMP_NPTYPE_KE        4       /* Key Exchange */
  76 #define ISAKMP_NPTYPE_ID        5       /* Identification */
  77 #define ISAKMP_NPTYPE_CERT      6       /* Certificate */
  78 #define ISAKMP_NPTYPE_CR        7       /* Certificate Request */
  79 #define ISAKMP_NPTYPE_HASH      8       /* Hash */
  80 #define ISAKMP_NPTYPE_SIG       9       /* Signature */
  81 #define ISAKMP_NPTYPE_NONCE     10      /* Nonce */
  82 #define ISAKMP_NPTYPE_N         11      /* Notification */
  83 #define ISAKMP_NPTYPE_D         12      /* Delete */
  84 #define ISAKMP_NPTYPE_VID       13      /* Vendor ID */
  85 #define ISAKMP_NPTYPE_NATD      15      /* NAT detection hash value */
  86 #define ISAKMP_NPTYPE_MAX       16
  87                         /*      128 - 255 Private Use */
  88
  89 /*
  90  * The following are valid when the Vendor ID is one of the
  91  * following:
  92  *
  93  *      MD5("A GSS-API Authentication Method for IKE")
  94  *      MD5("GSSAPI") (recognized by Windows 2000)
  95  *      MD5("MS NT5 ISAKMPOAKLEY") (sent by Windows 2000)
  96  *
  97  * See draft-ietf-ipsec-isakmp-gss-auth-06.txt.
  98  */
  99 #define ISAKMP_NPTYPE_GSS       129     /* GSS token */
 100
 101 #define ISAKMP_MAJOR_VERSION    1
 102 #define ISAKMP_MINOR_VERSION    0
 103 #define ISAKMP_VERSION_NUMBER   0x10
 104 #define ISAKMP_GETMAJORV(v)     (((v) & 0xf0) >> 4)
 105 #define ISAKMP_SETMAJORV(v, m)  ((v) = ((v) & 0x0f) | (((m) << 4) & 0xf0))
 106 #define ISAKMP_GETMINORV(v)     ((v) & 0x0f)
 107 #define ISAKMP_SETMINORV(v, m)  ((v) = ((v) & 0xf0) | ((m) & 0x0f))
 108
 109 /* Exchange Type */
 110 #define ISAKMP_ETYPE_NONE       0       /* NONE */
 111 #define ISAKMP_ETYPE_BASE       1       /* Base */
 112 #define ISAKMP_ETYPE_IDENT      2       /* Identity Proteciton */
 113 #define ISAKMP_ETYPE_AUTH       3       /* Authentication Only */
 114 #define ISAKMP_ETYPE_AGG        4       /* Aggressive */
 115 #define ISAKMP_ETYPE_INFO       5       /* Informational */
 116 /* Additional Exchange Type */
 117 #define ISAKMP_ETYPE_QUICK      32      /* Quick Mode */
 118 #define ISAKMP_ETYPE_NEWGRP     33      /* New group Mode */
 119 #define ISAKMP_ETYPE_ACKINFO    34      /* Acknowledged Informational */
 120
 121 /* Flags */
 122 #define ISAKMP_FLAG_E 0x01 /* Encryption Bit */
 123 #define ISAKMP_FLAG_C 0x02 /* Commit Bit */
 124 #define ISAKMP_FLAG_A 0x04 /* Authentication Only Bit */
 125
 126 /* 3.2 Payload Generic Header
 127          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
 128         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 129         ! Next Payload  !   RESERVED    !         Payload Length        !
 130         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 131 */
 132 struct isakmp_gen {
 133         u_int8_t np;            /* Next Payload */
 134         u_int8_t reserved;      /* RESERVED, unused, must set to 0 */
 135         u_int16_t len;          /* Payload Length */
 136 } __attribute__((__packed__));
 137
 138 /* 3.3 Data Attributes
 139          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
 140         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 141         !A!       Attribute Type        !    AF=0  Attribute Length     !
 142         !F!                             !    AF=1  Attribute Value      !
 143         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 144         .                   AF=0  Attribute Value                       .
 145         .                   AF=1  Not Transmitted                       .
 146         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 147 */
 148 struct isakmp_data {
 149         u_int16_t type;         /* defined by DOI-spec, and Attribute Format */
 150         u_int16_t lorv;         /* if f equal 1, Attribute Length */
 151                                 /* if f equal 0, Attribute Value */
 152         /* if f equal 1, Attribute Value */
 153 } __attribute__((__packed__));
 154 #define ISAKMP_GEN_TLV 0x0000
 155 #define ISAKMP_GEN_TV  0x8000
 156         /* mask for type of attribute format */
 157 #define ISAKMP_GEN_MASK 0x8000
 158
 159 #if 0
 160 /* MAY NOT be used, because of being defined in ipsec-doi. */
 161 /* 3.4 Security Association Payload */
 162 struct isakmp_pl_sa {
 163         struct isakmp_gen h;
 164         u_int32_t doi;          /* Domain of Interpretation */
 165         u_int32_t sit;          /* Situation */
 166 } __attribute__((__packed__));
 167 #endif
 168
 169 /* 3.5 Proposal Payload */
 170         /*
 171         The value of the next payload field MUST only contain the value "2"
 172         or "0".  If there are additional Proposal payloads in the message,
 173         then this field will be 2.  If the current Proposal payload is the
 174         last within the security association proposal, then this field will
 175         be 0.
 176         */
 177 struct isakmp_pl_p {
 178         struct isakmp_gen h;
 179         u_int8_t p_no;          /* Proposal # */
 180         u_int8_t proto_id;      /* Protocol */
 181         u_int8_t spi_size;      /* SPI Size */
 182         u_int8_t num_t;         /* Number of Transforms */
 183         /* SPI */
 184 } __attribute__((__packed__));
 185
 186 /* 3.6 Transform Payload */
 187         /*
 188         The value of the next payload field MUST only contain the value "3"
 189         or "0".  If there are additional Transform payloads in the proposal,
 190         then this field will be 3.  If the current Transform payload is the
 191         last within the proposal, then this field will be 0.
 192         */
 193 struct isakmp_pl_t {
 194         struct isakmp_gen h;
 195         u_int8_t t_no;          /* Transform # */
 196         u_int8_t t_id;          /* Transform-Id */
 197         u_int16_t reserved;     /* RESERVED2 */
 198         /* SA Attributes */
 199 } __attribute__((__packed__));
 200
 201 /* 3.7 Key Exchange Payload */
 202 struct isakmp_pl_ke {
 203         struct isakmp_gen h;
 204         /* Key Exchange Data */
 205 } __attribute__((__packed__));
 206
 207 #if 0
 208 /* NOTE: MUST NOT use because of being defined in ipsec-doi instead them. */
 209 /* 3.8 Identification Payload */
 210 struct isakmp_pl_id {
 211         struct isakmp_gen h;
 212         union {
 213                 u_int8_t id_type;       /* ID Type */
 214                 u_int32_t doi_data;     /* DOI Specific ID Data */
 215         } d;
 216         /* Identification Data */
 217 } __attribute__((__packed__));
 218 /* A.4 ISAKMP Identification Type Values */
 219 #define ISAKMP_ID_IPV4_ADDR             0
 220 #define ISAKMP_ID_IPV4_ADDR_SUBNET      1
 221 #define ISAKMP_ID_IPV6_ADDR             2
 222 #define ISAKMP_ID_IPV6_ADDR_SUBNET      3
 223 #endif
 224
 225 /* 3.9 Certificate Payload */
 226 struct isakmp_pl_cert {
 227         struct isakmp_gen h;
 228         /*
 229          * Encoding type of 1 octet follows immediately,
 230          * variable length CERT data follows encoding type.
 231          */
 232 } __attribute__((__packed__));
 233
 234 /* Certificate Type */
 235 #define ISAKMP_CERT_NONE        0
 236 #define ISAKMP_CERT_PKCS7       1
 237 #define ISAKMP_CERT_PGP         2
 238 #define ISAKMP_CERT_DNS         3
 239 #define ISAKMP_CERT_X509SIGN    4
 240 #define ISAKMP_CERT_X509KE      5
 241 #define ISAKMP_CERT_KERBEROS    6
 242 #define ISAKMP_CERT_CRL         7
 243 #define ISAKMP_CERT_ARL         8
 244 #define ISAKMP_CERT_SPKI        9
 245 #define ISAKMP_CERT_X509ATTR    10
 246
 247 /* the method to get peers certificate */
 248 #define ISAKMP_GETCERT_PAYLOAD          1
 249 #define ISAKMP_GETCERT_LOCALFILE        2
 250 #define ISAKMP_GETCERT_DNS              3
 251
 252 /* 3.10 Certificate Request Payload */
 253 struct isakmp_pl_cr {
 254         struct isakmp_gen h;
 255         u_int8_t num_cert; /* # Cert. Types */
 256         /*
 257         Certificate Types (variable length)
 258           -- Contains a list of the types of certificates requested,
 259           sorted in order of preference.  Each individual certificate
 260           type is 1 octet.  This field is NOT required.
 261         */
 262         /* # Certificate Authorities (1 octet) */
 263         /* Certificate Authorities (variable length) */
 264 } __attribute__((__packed__));
 265
 266 /* 3.11 Hash Payload */
 267 struct isakmp_pl_hash {
 268         struct isakmp_gen h;
 269         /* Hash Data */
 270 } __attribute__((__packed__));
 271
 272 /* 3.12 Signature Payload */
 273 struct isakmp_pl_sig {
 274         struct isakmp_gen h;
 275         /* Signature Data */
 276 } __attribute__((__packed__));
 277
 278 /* 3.13 Nonce Payload */
 279 struct isakmp_pl_nonce {
 280         struct isakmp_gen h;
 281         /* Nonce Data */
 282 } __attribute__((__packed__));
 283
 284 /* 3.14 Notification Payload */
 285 struct isakmp_pl_n {
 286         struct isakmp_gen h;
 287         u_int32_t doi;          /* Domain of Interpretation */
 288         u_int8_t proto_id;      /* Protocol-ID */
 289         u_int8_t spi_size;      /* SPI Size */
 290         u_int16_t type;         /* Notify Message Type */
 291         /* SPI */
 292         /* Notification Data */
 293 } __attribute__((__packed__));
 294
 295 /* 3.14.1 Notify Message Types */
 296 /* NOTIFY MESSAGES - ERROR TYPES */
 297 #define ISAKMP_NTYPE_INVALID_PAYLOAD_TYPE       1
 298 #define ISAKMP_NTYPE_DOI_NOT_SUPPORTED          2
 299 #define ISAKMP_NTYPE_SITUATION_NOT_SUPPORTED    3
 300 #define ISAKMP_NTYPE_INVALID_COOKIE             4
 301 #define ISAKMP_NTYPE_INVALID_MAJOR_VERSION      5
 302 #define ISAKMP_NTYPE_INVALID_MINOR_VERSION      6
 303 #define ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE      7
 304 #define ISAKMP_NTYPE_INVALID_FLAGS              8
 305 #define ISAKMP_NTYPE_INVALID_MESSAGE_ID         9
 306 #define ISAKMP_NTYPE_INVALID_PROTOCOL_ID        10
 307 #define ISAKMP_NTYPE_INVALID_SPI                11
 308 #define ISAKMP_NTYPE_INVALID_TRANSFORM_ID       12
 309 #define ISAKMP_NTYPE_ATTRIBUTES_NOT_SUPPORTED   13
 310 #define ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN         14
 311 #define ISAKMP_NTYPE_BAD_PROPOSAL_SYNTAX        15
 312 #define ISAKMP_NTYPE_PAYLOAD_MALFORMED          16
 313 #define ISAKMP_NTYPE_INVALID_KEY_INFORMATION    17
 314 #define ISAKMP_NTYPE_INVALID_ID_INFORMATION     18
 315 #define ISAKMP_NTYPE_INVALID_CERT_ENCODING      19
 316 #define ISAKMP_NTYPE_INVALID_CERTIFICATE        20
 317 #define ISAKMP_NTYPE_BAD_CERT_REQUEST_SYNTAX    21
 318 #define ISAKMP_NTYPE_INVALID_CERT_AUTHORITY     22
 319 #define ISAKMP_NTYPE_INVALID_HASH_INFORMATION   23
 320 #define ISAKMP_NTYPE_AUTHENTICATION_FAILED      24
 321 #define ISAKMP_NTYPE_INVALID_SIGNATURE          25
 322 #define ISAKMP_NTYPE_ADDRESS_NOTIFICATION       26
 323 #define ISAKMP_NTYPE_NOTIFY_SA_LIFETIME         27
 324 #define ISAKMP_NTYPE_CERTIFICATE_UNAVAILABLE    28
 325 #define ISAKMP_NTYPE_UNSUPPORTED_EXCHANGE_TYPE  29
 326 #define ISAKMP_NTYPE_UNEQUAL_PAYLOAD_LENGTHS    30
 327 /* NOTIFY MESSAGES - STATUS TYPES */
 328 #define ISAKMP_NTYPE_CONNECTED                  16384
 329 /* 4.6.3 IPSEC DOI Notify Message Types */
 330 #define ISAKMP_NTYPE_RESPONDER_LIFETIME         24576
 331 #define ISAKMP_NTYPE_REPLAY_STATUS              24577
 332 #define ISAKMP_NTYPE_INITIAL_CONTACT            24578
 333
 334 /* using only to log */
 335 #define ISAKMP_LOG_RETRY_LIMIT_REACHED          65530
 336
 337 /* XXX means internal error but it's not reserved by any drafts... */
 338 #define ISAKMP_INTERNAL_ERROR                   -1
 339
 340 /* 3.15 Delete Payload */
 341 struct isakmp_pl_d {
 342         struct isakmp_gen h;
 343         u_int32_t doi;          /* Domain of Interpretation */
 344         u_int8_t proto_id;      /* Protocol-Id */
 345         u_int8_t spi_size;      /* SPI Size */
 346         u_int16_t num_spi;      /* # of SPIs */
 347         /* SPI(es) */
 348 } __attribute__((__packed__));
 349