contrib/tcpdump/isakmp.h

   1 /*
   2  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the project nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 /* YIPS @(#)$Id: isakmp.h,v 1.11 2007-08-29 02:38:14 mcr Exp $ */
  30
  31 /* refer to RFC 2408 */
  32
  33 /* must include <netinet/in.h> */
  34
  35 #if !defined(_ISAKMP_H_)
  36 #define _ISAKMP_H_
  37
  38 typedef u_char cookie_t[8];
  39 typedef u_char msgid_t[4];
  40
  41 typedef struct { /* i_cookie + r_cookie */
  42         cookie_t i_ck;
  43         cookie_t r_ck;
  44 } isakmp_index;
  45
  46 #define INITIATOR       1
  47 #define RESPONDER       2
  48
  49 #define PORT_ISAKMP 500
  50
  51 #define GENERATE  1
  52 #define VALIDATE  0
  53
  54 /* Phase of oakley definition */
  55 /*
  56   0000 0000 0000 0000
  57        |    |||| ||||
  58        |    |||| ++++--> negosiation number in phase
  59        |    ++++-------> phase number
  60        +---------------> expire ?
  61  */
  62 #define ISAKMP_PH1      0x0010
  63 #define ISAKMP_PH2      0x0020
  64 #define ISAKMP_EXPIRED  0x0100
  65
  66 #define ISAKMP_NGP_0    0x0000
  67 #define ISAKMP_NGP_1    0x0001
  68 #define ISAKMP_NGP_2    0x0002
  69 #define ISAKMP_NGP_3    0x0003
  70 #define ISAKMP_NGP_4    0x0004
  71
  72 #define ISAKMP_PH1_N    (ISAKMP_PH1 | ISAKMP_NGP_0)  /* i.e. spawn */
  73 #define ISAKMP_PH1_1    (ISAKMP_PH1 | ISAKMP_NGP_1)
  74 #define ISAKMP_PH1_2    (ISAKMP_PH1 | ISAKMP_NGP_2)
  75 #define ISAKMP_PH1_3    (ISAKMP_PH1 | ISAKMP_NGP_3)
  76 #define ISAKMP_PH2_N    (ISAKMP_PH2 | ISAKMP_NGP_0)
  77 #define ISAKMP_PH2_1    (ISAKMP_PH2 | ISAKMP_NGP_1)
  78 #define ISAKMP_PH2_2    (ISAKMP_PH2 | ISAKMP_NGP_2)
  79 #define ISAKMP_PH2_3    (ISAKMP_PH2 | ISAKMP_NGP_3)
  80
  81 #define ISAKMP_TIMER_DEFAULT     10 /* seconds */
  82 #define ISAKMP_TRY_DEFAULT        3 /* times */
  83
  84 /* 3.1 ISAKMP Header Format (IKEv1 and IKEv2)
  85          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
  86         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  87         !                          Initiator                            !
  88         !                            Cookie                             !
  89         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  90         !                          Responder                            !
  91         !                            Cookie                             !
  92         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  93         !  Next Payload ! MjVer ! MnVer ! Exchange Type !     Flags     !
  94         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  95         !                          Message ID                           !
  96         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  97         !                            Length                             !
  98         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  99 */
 100 struct isakmp {
 101         cookie_t i_ck;          /* Initiator Cookie */
 102         cookie_t r_ck;          /* Responder Cookie */
 103         u_int8_t np;            /* Next Payload Type */
 104         u_int8_t vers;
 105 #define ISAKMP_VERS_MAJOR       0xf0
 106 #define ISAKMP_VERS_MAJOR_SHIFT 4
 107 #define ISAKMP_VERS_MINOR       0x0f
 108 #define ISAKMP_VERS_MINOR_SHIFT 0
 109         u_int8_t etype;         /* Exchange Type */
 110         u_int8_t flags;         /* Flags */
 111         msgid_t msgid;
 112         u_int32_t len;          /* Length */
 113 };
 114
 115 /* Next Payload Type */
 116 #define ISAKMP_NPTYPE_NONE   0 /* NONE*/
 117 #define ISAKMP_NPTYPE_SA     1 /* Security Association */
 118 #define ISAKMP_NPTYPE_P      2 /* Proposal */
 119 #define ISAKMP_NPTYPE_T      3 /* Transform */
 120 #define ISAKMP_NPTYPE_KE     4 /* Key Exchange */
 121 #define ISAKMP_NPTYPE_ID     5 /* Identification */
 122 #define ISAKMP_NPTYPE_CERT   6 /* Certificate */
 123 #define ISAKMP_NPTYPE_CR     7 /* Certificate Request */
 124 #define ISAKMP_NPTYPE_HASH   8 /* Hash */
 125 #define ISAKMP_NPTYPE_SIG    9 /* Signature */
 126 #define ISAKMP_NPTYPE_NONCE 10 /* Nonce */
 127 #define ISAKMP_NPTYPE_N     11 /* Notification */
 128 #define ISAKMP_NPTYPE_D     12 /* Delete */
 129 #define ISAKMP_NPTYPE_VID   13 /* Vendor ID */
 130
 131 #define IKEv1_MAJOR_VERSION  1
 132 #define IKEv1_MINOR_VERSION  0
 133
 134 #define IKEv2_MAJOR_VERSION  2
 135 #define IKEv2_MINOR_VERSION  0
 136
 137 /* Exchange Type */
 138 #define ISAKMP_ETYPE_NONE   0 /* NONE */
 139 #define ISAKMP_ETYPE_BASE   1 /* Base */
 140 #define ISAKMP_ETYPE_IDENT  2 /* Identity Proteciton */
 141 #define ISAKMP_ETYPE_AUTH   3 /* Authentication Only */
 142 #define ISAKMP_ETYPE_AGG    4 /* Aggressive */
 143 #define ISAKMP_ETYPE_INF    5 /* Informational */
 144
 145 /* Flags */
 146 #define ISAKMP_FLAG_E 0x01 /* Encryption Bit */
 147 #define ISAKMP_FLAG_C 0x02 /* Commit Bit */
 148 #define ISAKMP_FLAG_extra 0x04
 149
 150 /* IKEv2 */
 151 #define ISAKMP_FLAG_I (1 << 3)  /* (I)nitiator */
 152 #define ISAKMP_FLAG_V (1 << 4)  /* (V)ersion   */
 153 #define ISAKMP_FLAG_R (1 << 5)  /* (R)esponse  */
 154
 155
 156 /* 3.2 Payload Generic Header
 157          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
 158         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 159         ! Next Payload  !   RESERVED    !         Payload Length        !
 160         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 161 */
 162 struct isakmp_gen {
 163         u_int8_t  np;       /* Next Payload */
 164         u_int8_t  critical; /* bit 7 - critical, rest is RESERVED */
 165         u_int16_t len;      /* Payload Length */
 166 };
 167
 168 /* 3.3 Data Attributes
 169          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
 170         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 171         !A!       Attribute Type        !    AF=0  Attribute Length     !
 172         !F!                             !    AF=1  Attribute Value      !
 173         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 174         .                   AF=0  Attribute Value                       .
 175         .                   AF=1  Not Transmitted                       .
 176         +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 177 */
 178 struct isakmp_data {
 179         u_int16_t type;     /* defined by DOI-spec, and Attribute Format */
 180         u_int16_t lorv;     /* if f equal 1, Attribute Length */
 181                           /* if f equal 0, Attribute Value */
 182         /* if f equal 1, Attribute Value */
 183 };
 184 #define ISAKMP_GEN_TLV 0x0000
 185 #define ISAKMP_GEN_TV  0x8000
 186         /* mask for type of attribute format */
 187 #define ISAKMP_GEN_MASK 0x8000
 188
 189 /* 3.4 Security Association Payload */
 190         /* MAY NOT be used, because of being defined in ipsec-doi. */
 191         /*
 192         If the current payload is the last in the message,
 193         then the value of the next payload field will be 0.
 194         This field MUST NOT contain the
 195         values for the Proposal or Transform payloads as they are considered
 196         part of the security association negotiation.  For example, this
 197         field would contain the value "10" (Nonce payload) in the first
 198         message of a Base Exchange (see Section 4.4) and the value "0" in the
 199         first message of an Identity Protect Exchange (see Section 4.5).
 200         */
 201 struct ikev1_pl_sa {
 202         struct isakmp_gen h;
 203         u_int32_t doi; /* Domain of Interpretation */
 204         u_int32_t sit; /* Situation */
 205 };
 206
 207 /* 3.5 Proposal Payload */
 208         /*
 209         The value of the next payload field MUST only contain the value "2"
 210         or "0".  If there are additional Proposal payloads in the message,
 211         then this field will be 2.  If the current Proposal payload is the
 212         last within the security association proposal, then this field will
 213         be 0.
 214         */
 215 struct ikev1_pl_p {
 216         struct isakmp_gen h;
 217         u_int8_t p_no;      /* Proposal # */
 218         u_int8_t prot_id;   /* Protocol */
 219         u_int8_t spi_size;  /* SPI Size */
 220         u_int8_t num_t;     /* Number of Transforms */
 221         /* SPI */
 222 };
 223
 224 /* 3.6 Transform Payload */
 225         /*
 226         The value of the next payload field MUST only contain the value "3"
 227         or "0".  If there are additional Transform payloads in the proposal,
 228         then this field will be 3.  If the current Transform payload is the
 229         last within the proposal, then this field will be 0.
 230         */
 231 struct ikev1_pl_t {
 232         struct isakmp_gen h;
 233         u_int8_t  t_no;     /* Transform # */
 234         u_int8_t  t_id;     /* Transform-Id */
 235         u_int16_t reserved; /* RESERVED2 */
 236         /* SA Attributes */
 237 };
 238
 239 /* 3.7 Key Exchange Payload */
 240 struct ikev1_pl_ke {
 241         struct isakmp_gen h;
 242         /* Key Exchange Data */
 243 };
 244
 245 /* 3.8 Identification Payload */
 246         /* MUST NOT to be used, because of being defined in ipsec-doi. */
 247 struct ikev1_pl_id {
 248         struct isakmp_gen h;
 249         union {
 250                 u_int8_t  id_type;   /* ID Type */
 251                 u_int32_t doi_data;  /* DOI Specific ID Data */
 252         } d;
 253         /* Identification Data */
 254 };
 255
 256 /* 3.9 Certificate Payload */
 257 struct ikev1_pl_cert {
 258         struct isakmp_gen h;
 259         u_int8_t encode; /* Cert Encoding */
 260         char   cert;   /* Certificate Data */
 261                 /*
 262                 This field indicates the type of
 263                 certificate or certificate-related information contained in the
 264                 Certificate Data field.
 265                 */
 266 };
 267
 268 /* Certificate Type */
 269 #define ISAKMP_CERT_NONE   0
 270 #define ISAKMP_CERT_PKCS   1
 271 #define ISAKMP_CERT_PGP    2
 272 #define ISAKMP_CERT_DNS    3
 273 #define ISAKMP_CERT_SIGN   4
 274 #define ISAKMP_CERT_KE     5
 275 #define ISAKMP_CERT_KT     6
 276 #define ISAKMP_CERT_CRL    7
 277 #define ISAKMP_CERT_ARL    8
 278 #define ISAKMP_CERT_SPKI   9
 279
 280 /* 3.10 Certificate Request Payload */
 281 struct ikev1_pl_cr {
 282         struct isakmp_gen h;
 283         u_int8_t num_cert; /* # Cert. Types */
 284         /*
 285         Certificate Types (variable length)
 286           -- Contains a list of the types of certificates requested,
 287           sorted in order of preference.  Each individual certificate
 288           type is 1 octet.  This field is NOT requiredo
 289         */
 290         /* # Certificate Authorities (1 octet) */
 291         /* Certificate Authorities (variable length) */
 292 };
 293
 294 /* 3.11 Hash Payload */
 295         /* may not be used, because of having only data. */
 296 struct ikev1_pl_hash {
 297         struct isakmp_gen h;
 298         /* Hash Data */
 299 };
 300
 301 /* 3.12 Signature Payload */
 302         /* may not be used, because of having only data. */
 303 struct ikev1_pl_sig {
 304         struct isakmp_gen h;
 305         /* Signature Data */
 306 };
 307
 308 /* 3.13 Nonce Payload */
 309         /* may not be used, because of having only data. */
 310 struct ikev1_pl_nonce {
 311         struct isakmp_gen h;
 312         /* Nonce Data */
 313 };
 314
 315 /* 3.14 Notification Payload */
 316 struct ikev1_pl_n {
 317         struct isakmp_gen h;
 318         u_int32_t doi;      /* Domain of Interpretation */
 319         u_int8_t  prot_id;  /* Protocol-ID */
 320         u_int8_t  spi_size; /* SPI Size */
 321         u_int16_t type;     /* Notify Message Type */
 322         /* SPI */
 323         /* Notification Data */
 324 };
 325
 326 /* 3.14.1 Notify Message Types */
 327 /* NOTIFY MESSAGES - ERROR TYPES */
 328 #define ISAKMP_NTYPE_INVALID_PAYLOAD_TYPE           1
 329 #define ISAKMP_NTYPE_DOI_NOT_SUPPORTED              2
 330 #define ISAKMP_NTYPE_SITUATION_NOT_SUPPORTED        3
 331 #define ISAKMP_NTYPE_INVALID_COOKIE                 4
 332 #define ISAKMP_NTYPE_INVALID_MAJOR_VERSION          5
 333 #define ISAKMP_NTYPE_INVALID_MINOR_VERSION          6
 334 #define ISAKMP_NTYPE_INVALID_EXCHANGE_TYPE          7
 335 #define ISAKMP_NTYPE_INVALID_FLAGS                  8
 336 #define ISAKMP_NTYPE_INVALID_MESSAGE_ID             9
 337 #define ISAKMP_NTYPE_INVALID_PROTOCOL_ID            10
 338 #define ISAKMP_NTYPE_INVALID_SPI                    11
 339 #define ISAKMP_NTYPE_INVALID_TRANSFORM_ID           12
 340 #define ISAKMP_NTYPE_ATTRIBUTES_NOT_SUPPORTED       13
 341 #define ISAKMP_NTYPE_NO_PROPOSAL_CHOSEN             14
 342 #define ISAKMP_NTYPE_BAD_PROPOSAL_SYNTAX            15
 343 #define ISAKMP_NTYPE_PAYLOAD_MALFORMED              16
 344 #define ISAKMP_NTYPE_INVALID_KEY_INFORMATION        17
 345 #define ISAKMP_NTYPE_INVALID_ID_INFORMATION         18
 346 #define ISAKMP_NTYPE_INVALID_CERT_ENCODING          19
 347 #define ISAKMP_NTYPE_INVALID_CERTIFICATE            20
 348 #define ISAKMP_NTYPE_BAD_CERT_REQUEST_SYNTAX        21
 349 #define ISAKMP_NTYPE_INVALID_CERT_AUTHORITY         22
 350 #define ISAKMP_NTYPE_INVALID_HASH_INFORMATION       23
 351 #define ISAKMP_NTYPE_AUTHENTICATION_FAILED          24
 352 #define ISAKMP_NTYPE_INVALID_SIGNATURE              25
 353 #define ISAKMP_NTYPE_ADDRESS_NOTIFICATION           26
 354 /* NOTIFY MESSAGES - STATUS TYPES */
 355 #define ISAKMP_NTYPE_CONNECTED                   16384
 356 /* using only to log */
 357 #define ISAKMP_LOG_RETRY_LIMIT_REACHED           65530
 358
 359 /* 3.15 Delete Payload */
 360 struct ikev1_pl_d {
 361         struct isakmp_gen h;
 362         u_int32_t doi;      /* Domain of Interpretation */
 363         u_int8_t  prot_id;  /* Protocol-Id */
 364         u_int8_t  spi_size; /* SPI Size */
 365         u_int16_t num_spi;  /* # of SPIs */
 366         /* SPI(es) */
 367 };
 368
 369 \f
 370 struct ikev1_ph1tab {
 371         struct ikev1_ph1 *head;
 372         struct ikev1_ph1 *tail;
 373         int len;
 374 };
 375
 376 struct isakmp_ph2tab {
 377         struct ikev1_ph2 *head;
 378         struct ikev1_ph2 *tail;
 379         int len;
 380 };
 381
 382 #define EXCHANGE_PROXY   1
 383 #define EXCHANGE_MYSELF  0
 384
 385 #define PFS_NEED        1
 386 #define PFS_NONEED      0
 387
 388 /* IKEv2 (RFC4306) */
 389
 390 /* 3.3  Security Association Payload -- generic header */
 391 /* 3.3.1.  Proposal Substructure */
 392 struct ikev2_p {
 393         struct isakmp_gen h;
 394         u_int8_t p_no;      /* Proposal # */
 395         u_int8_t prot_id;   /* Protocol */
 396         u_int8_t spi_size;  /* SPI Size */
 397         u_int8_t num_t;     /* Number of Transforms */
 398 };
 399
 400 /* 3.3.2.  Transform Substructure */
 401 struct ikev2_t {
 402         struct isakmp_gen h;
 403         u_int8_t t_type;    /* Transform Type (ENCR,PRF,INTEG,etc.*/
 404         u_int8_t res2;      /* reserved byte */
 405         u_int16_t t_id;     /* Transform ID */
 406 };
 407
 408 enum ikev2_t_type {
 409         IV2_T_ENCR = 1,
 410         IV2_T_PRF  = 2,
 411         IV2_T_INTEG= 3,
 412         IV2_T_DH   = 4,
 413         IV2_T_ESN  = 5,
 414 };
 415
 416 /* 3.4.  Key Exchange Payload */
 417 struct ikev2_ke {
 418         struct isakmp_gen h;
 419         u_int16_t  ke_group;
 420         u_int16_t  ke_res1;
 421         /* KE data */
 422 };
 423
 424
 425 /* 3.10 Notification Payload */
 426 struct ikev2_n {
 427         struct isakmp_gen h;
 428         u_int8_t  prot_id;  /* Protocol-ID */
 429         u_int8_t  spi_size; /* SPI Size */
 430         u_int16_t type;     /* Notify Message Type */
 431         /* SPI */
 432         /* Notification Data */
 433 };
 434
 435 enum ikev2_n_type {
 436         IV2_NOTIFY_UNSUPPORTED_CRITICAL_PAYLOAD            = 1,
 437         IV2_NOTIFY_INVALID_IKE_SPI                         = 4,
 438         IV2_NOTIFY_INVALID_MAJOR_VERSION                   = 5,
 439         IV2_NOTIFY_INVALID_SYNTAX                          = 7,
 440         IV2_NOTIFY_INVALID_MESSAGE_ID                      = 9,
 441         IV2_NOTIFY_INVALID_SPI                             =11,
 442         IV2_NOTIFY_NO_PROPOSAL_CHOSEN                      =14,
 443         IV2_NOTIFY_INVALID_KE_PAYLOAD                      =17,
 444         IV2_NOTIFY_AUTHENTICATION_FAILED                   =24,
 445         IV2_NOTIFY_SINGLE_PAIR_REQUIRED                    =34,
 446         IV2_NOTIFY_NO_ADDITIONAL_SAS                       =35,
 447         IV2_NOTIFY_INTERNAL_ADDRESS_FAILURE                =36,
 448         IV2_NOTIFY_FAILED_CP_REQUIRED                      =37,
 449         IV2_NOTIFY_INVALID_SELECTORS                       =39,
 450         IV2_NOTIFY_INITIAL_CONTACT                         =16384,
 451         IV2_NOTIFY_SET_WINDOW_SIZE                         =16385,
 452         IV2_NOTIFY_ADDITIONAL_TS_POSSIBLE                  =16386,
 453         IV2_NOTIFY_IPCOMP_SUPPORTED                        =16387,
 454         IV2_NOTIFY_NAT_DETECTION_SOURCE_IP                 =16388,
 455         IV2_NOTIFY_NAT_DETECTION_DESTINATION_IP            =16389,
 456         IV2_NOTIFY_COOKIE                                  =16390,
 457         IV2_NOTIFY_USE_TRANSPORT_MODE                      =16391,
 458         IV2_NOTIFY_HTTP_CERT_LOOKUP_SUPPORTED              =16392,
 459         IV2_NOTIFY_REKEY_SA                                =16393,
 460         IV2_NOTIFY_ESP_TFC_PADDING_NOT_SUPPORTED           =16394,
 461         IV2_NOTIFY_NON_FIRST_FRAGMENTS_ALSO                =16395
 462 };
 463
 464 struct notify_messages {
 465         u_int16_t type;
 466         char     *msg;
 467 };
 468
 469 /* 3.8 Notification Payload */
 470 struct ikev2_auth {
 471         struct isakmp_gen h;
 472         u_int8_t  auth_method;  /* Protocol-ID */
 473         u_int8_t  reserved[3];
 474         /* authentication data */
 475 };
 476
 477 enum ikev2_auth_type {
 478         IV2_RSA_SIG = 1,
 479         IV2_SHARED  = 2,
 480         IV2_DSS_SIG = 3,
 481 };
 482
 483 #endif /* !defined(_ISAKMP_H_) */