| File: | src/sbin/isakmpd/ike_quick_mode.c |
| Warning: | line 1194, column 15 Result of 'calloc' is converted to a pointer of type 'u_int8_t', which is incompatible with sizeof operand type 'char' |
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| 1 | /* $OpenBSD: ike_quick_mode.c,v 1.114 2018/01/15 09:54:48 mpi Exp $ */ |
| 2 | /* $EOM: ike_quick_mode.c,v 1.139 2001/01/26 10:43:17 niklas Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1998, 1999, 2000, 2001 Niklas Hallqvist. All rights reserved. |
| 6 | * Copyright (c) 1999, 2000, 2001 Angelos D. Keromytis. All rights reserved. |
| 7 | * Copyright (c) 2000, 2001, 2004 Håkan Olsson. 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 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | /* |
| 31 | * This code was written under funding by Ericsson Radio Systems. |
| 32 | */ |
| 33 | |
| 34 | #include <stdlib.h> |
| 35 | #include <string.h> |
| 36 | |
| 37 | #include <sys/types.h> |
| 38 | #include <regex.h> |
| 39 | #include <keynote.h> |
| 40 | |
| 41 | #include "attribute.h" |
| 42 | #include "conf.h" |
| 43 | #include "connection.h" |
| 44 | #include "dh.h" |
| 45 | #include "doi.h" |
| 46 | #include "exchange.h" |
| 47 | #include "hash.h" |
| 48 | #include "ike_quick_mode.h" |
| 49 | #include "ipsec.h" |
| 50 | #include "log.h" |
| 51 | #include "message.h" |
| 52 | #include "policy.h" |
| 53 | #include "prf.h" |
| 54 | #include "sa.h" |
| 55 | #include "transport.h" |
| 56 | #include "util.h" |
| 57 | #include "key.h" |
| 58 | #include "x509.h" |
| 59 | |
| 60 | static void gen_g_xy(struct message *); |
| 61 | static int initiator_send_HASH_SA_NONCE(struct message *); |
| 62 | static int initiator_recv_HASH_SA_NONCE(struct message *); |
| 63 | static int initiator_send_HASH(struct message *); |
| 64 | static void post_quick_mode(struct message *); |
| 65 | static int responder_recv_HASH_SA_NONCE(struct message *); |
| 66 | static int responder_send_HASH_SA_NONCE(struct message *); |
| 67 | static int responder_recv_HASH(struct message *); |
| 68 | |
| 69 | static int check_policy(struct exchange *, struct sa *, struct sa *); |
| 70 | |
| 71 | int (*ike_quick_mode_initiator[])(struct message *) = { |
| 72 | initiator_send_HASH_SA_NONCE, |
| 73 | initiator_recv_HASH_SA_NONCE, |
| 74 | initiator_send_HASH |
| 75 | }; |
| 76 | |
| 77 | int (*ike_quick_mode_responder[])(struct message *) = { |
| 78 | responder_recv_HASH_SA_NONCE, |
| 79 | responder_send_HASH_SA_NONCE, |
| 80 | responder_recv_HASH |
| 81 | }; |
| 82 | |
| 83 | /* How many return values will policy handle -- true/false for now */ |
| 84 | #define RETVALUES_NUM2 2 |
| 85 | |
| 86 | /* |
| 87 | * Given an exchange and our policy, check whether the SA and IDs are |
| 88 | * acceptable. |
| 89 | */ |
| 90 | static int |
| 91 | check_policy(struct exchange *exchange, struct sa *sa, struct sa *isakmp_sa) |
| 92 | { |
| 93 | char *return_values[RETVALUES_NUM2]; |
| 94 | char **principal = 0; |
| 95 | int i, len, result = 0, nprinc = 0; |
| 96 | int *x509_ids = 0, *keynote_ids = 0; |
| 97 | unsigned char hashbuf[20]; /* Set to the largest digest result */ |
| 98 | struct keynote_deckey dc; |
| 99 | X509_NAME *subject; |
| 100 | |
| 101 | /* Do we want to use keynote policies? */ |
| 102 | if (ignore_policy || |
| 103 | strncmp("yes", conf_get_str("General", "Use-Keynote"), 3)) |
| 104 | return 1; |
| 105 | |
| 106 | /* Initialize if necessary -- e.g., if pre-shared key auth was used */ |
| 107 | if (isakmp_sa->policy_id < 0) { |
| 108 | if ((isakmp_sa->policy_id = kn_init()) == -1) { |
| 109 | log_print("check_policy: " |
| 110 | "failed to initialize policy session"); |
| 111 | return 0; |
| 112 | } |
| 113 | } |
| 114 | /* Add the callback that will handle attributes. */ |
| 115 | if (kn_add_action(isakmp_sa->policy_id, ".*", (char *)policy_callback, |
| 116 | ENVIRONMENT_FLAG_FUNC0x0001 | ENVIRONMENT_FLAG_REGEX0x0002) == -1) { |
| 117 | log_print("check_policy: " |
| 118 | "kn_add_action (%d, \".*\", %p, FUNC | REGEX) failed", |
| 119 | isakmp_sa->policy_id, policy_callback); |
| 120 | kn_close(isakmp_sa->policy_id); |
| 121 | isakmp_sa->policy_id = -1; |
| 122 | return 0; |
| 123 | } |
| 124 | if (policy_asserts_num) { |
| 125 | keynote_ids = calloc(policy_asserts_num, sizeof *keynote_ids); |
| 126 | if (!keynote_ids) { |
| 127 | log_error("check_policy: calloc (%d, %lu) failed", |
| 128 | policy_asserts_num, |
| 129 | (unsigned long)sizeof *keynote_ids); |
| 130 | kn_close(isakmp_sa->policy_id); |
| 131 | isakmp_sa->policy_id = -1; |
| 132 | return 0; |
| 133 | } |
| 134 | } |
| 135 | /* Add the policy assertions */ |
| 136 | for (i = 0; i < policy_asserts_num; i++) |
| 137 | keynote_ids[i] = kn_add_assertion(isakmp_sa->policy_id, |
| 138 | policy_asserts[i], |
| 139 | strlen(policy_asserts[i]), ASSERT_FLAG_LOCAL0x0001); |
| 140 | |
| 141 | /* Initialize -- we'll let the callback do all the work. */ |
| 142 | policy_exchange = exchange; |
| 143 | policy_sa = sa; |
| 144 | policy_isakmp_sa = isakmp_sa; |
| 145 | |
| 146 | /* Set the return values; true/false for now at least. */ |
| 147 | return_values[0] = "false"; /* Order of values in array is |
| 148 | * important. */ |
| 149 | return_values[1] = "true"; |
| 150 | |
| 151 | /* Create a principal (authorizer) for the SA/ID request. */ |
| 152 | switch (isakmp_sa->recv_certtype) { |
| 153 | case ISAKMP_CERTENC_NONE0: |
| 154 | /* |
| 155 | * For shared keys, just duplicate the passphrase with the |
| 156 | * appropriate prefix tag. |
| 157 | */ |
| 158 | nprinc = 3; |
| 159 | principal = calloc(nprinc, sizeof *principal); |
| 160 | if (!principal) { |
| 161 | log_error("check_policy: calloc (%d, %lu) failed", |
| 162 | nprinc, (unsigned long)sizeof *principal); |
| 163 | goto policydone; |
| 164 | } |
| 165 | len = strlen(isakmp_sa->recv_key) + sizeof "passphrase:"; |
| 166 | principal[0] = calloc(len, sizeof(char)); |
| 167 | if (!principal[0]) { |
| 168 | log_error("check_policy: calloc (%d, %lu) failed", len, |
| 169 | (unsigned long)sizeof(char)); |
| 170 | goto policydone; |
| 171 | } |
| 172 | /* |
| 173 | * XXX Consider changing the magic hash lengths with |
| 174 | * constants. |
| 175 | */ |
| 176 | strlcpy(principal[0], "passphrase:", len); |
| 177 | memcpy(principal[0] + sizeof "passphrase:" - 1, |
| 178 | isakmp_sa->recv_key, strlen(isakmp_sa->recv_key)); |
| 179 | |
| 180 | len = sizeof "passphrase-md5-hex:" + 2 * 16; |
| 181 | principal[1] = calloc(len, sizeof(char)); |
| 182 | if (!principal[1]) { |
| 183 | log_error("check_policy: calloc (%d, %lu) failed", len, |
| 184 | (unsigned long)sizeof(char)); |
| 185 | goto policydone; |
| 186 | } |
| 187 | strlcpy(principal[1], "passphrase-md5-hex:", len); |
| 188 | MD5(isakmp_sa->recv_key, strlen(isakmp_sa->recv_key), hashbuf); |
| 189 | for (i = 0; i < 16; i++) |
| 190 | snprintf(principal[1] + 2 * i + |
| 191 | sizeof "passphrase-md5-hex:" - 1, 3, "%02x", |
| 192 | hashbuf[i]); |
| 193 | |
| 194 | len = sizeof "passphrase-sha1-hex:" + 2 * 20; |
| 195 | principal[2] = calloc(len, sizeof(char)); |
| 196 | if (!principal[2]) { |
| 197 | log_error("check_policy: calloc (%d, %lu) failed", len, |
| 198 | (unsigned long)sizeof(char)); |
| 199 | goto policydone; |
| 200 | } |
| 201 | strlcpy(principal[2], "passphrase-sha1-hex:", len); |
| 202 | SHA1(isakmp_sa->recv_key, strlen(isakmp_sa->recv_key), |
| 203 | hashbuf); |
| 204 | for (i = 0; i < 20; i++) |
| 205 | snprintf(principal[2] + 2 * i + |
| 206 | sizeof "passphrase-sha1-hex:" - 1, 3, "%02x", |
| 207 | hashbuf[i]); |
| 208 | break; |
| 209 | |
| 210 | case ISAKMP_CERTENC_KEYNOTE11: |
| 211 | nprinc = 1; |
| 212 | |
| 213 | principal = calloc(nprinc, sizeof *principal); |
| 214 | if (!principal) { |
| 215 | log_error("check_policy: calloc (%d, %lu) failed", |
| 216 | nprinc, (unsigned long)sizeof *principal); |
| 217 | goto policydone; |
| 218 | } |
| 219 | /* Dup the keys */ |
| 220 | principal[0] = strdup(isakmp_sa->keynote_key); |
| 221 | if (!principal[0]) { |
| 222 | log_error("check_policy: calloc (%lu, %lu) failed", |
| 223 | (unsigned long)strlen(isakmp_sa->keynote_key), |
| 224 | (unsigned long)sizeof(char)); |
| 225 | goto policydone; |
| 226 | } |
| 227 | break; |
| 228 | |
| 229 | case ISAKMP_CERTENC_X509_SIG4: |
| 230 | principal = calloc(2, sizeof *principal); |
| 231 | if (!principal) { |
| 232 | log_error("check_policy: calloc (2, %lu) failed", |
| 233 | (unsigned long)sizeof *principal); |
| 234 | goto policydone; |
| 235 | } |
| 236 | if (isakmp_sa->recv_keytype == ISAKMP_KEY_RSA2) |
| 237 | dc.dec_algorithm = KEYNOTE_ALGORITHM_RSA6; |
| 238 | else { |
| 239 | log_error("check_policy: " |
| 240 | "unknown/unsupported public key algorithm %d", |
| 241 | isakmp_sa->recv_keytype); |
| 242 | goto policydone; |
| 243 | } |
| 244 | |
| 245 | dc.dec_key = isakmp_sa->recv_key; |
| 246 | principal[0] = kn_encode_key(&dc, INTERNAL_ENC_PKCS11, |
| 247 | ENCODING_HEX1, KEYNOTE_PUBLIC_KEY0); |
| 248 | if (keynote_errno == ERROR_MEMORY-1) { |
| 249 | log_print("check_policy: " |
| 250 | "failed to get memory for public key"); |
| 251 | goto policydone; |
| 252 | } |
| 253 | if (!principal[0]) { |
| 254 | log_print("check_policy: " |
| 255 | "failed to allocate memory for principal"); |
| 256 | goto policydone; |
| 257 | } |
| 258 | if (asprintf(&principal[1], "rsa-hex:%s", principal[0]) == -1) { |
| 259 | log_error("check_policy: asprintf() failed"); |
| 260 | goto policydone; |
| 261 | } |
| 262 | free(principal[0]); |
| 263 | principal[0] = principal[1]; |
| 264 | principal[1] = 0; |
| 265 | |
| 266 | /* Generate a "DN:" principal. */ |
| 267 | subject = X509_get_subject_name(isakmp_sa->recv_cert); |
| 268 | if (subject) { |
| 269 | principal[1] = calloc(259, sizeof(char)); |
| 270 | if (!principal[1]) { |
| 271 | log_error("check_policy: " |
| 272 | "calloc (259, %lu) failed", |
| 273 | (unsigned long)sizeof(char)); |
| 274 | goto policydone; |
| 275 | } |
| 276 | strlcpy(principal[1], "DN:", 259); |
| 277 | X509_NAME_oneline(subject, principal[1] + 3, 256); |
| 278 | nprinc = 2; |
| 279 | } else { |
| 280 | nprinc = 1; |
| 281 | } |
| 282 | break; |
| 283 | |
| 284 | /* XXX Eventually handle these. */ |
| 285 | case ISAKMP_CERTENC_PKCS1: |
| 286 | case ISAKMP_CERTENC_PGP2: |
| 287 | case ISAKMP_CERTENC_DNS3: |
| 288 | case ISAKMP_CERTENC_X509_KE5: |
| 289 | case ISAKMP_CERTENC_KERBEROS6: |
| 290 | case ISAKMP_CERTENC_CRL7: |
| 291 | case ISAKMP_CERTENC_ARL8: |
| 292 | case ISAKMP_CERTENC_SPKI9: |
| 293 | case ISAKMP_CERTENC_X509_ATTR10: |
| 294 | default: |
| 295 | log_print("check_policy: " |
| 296 | "unknown/unsupported certificate/authentication method %d", |
| 297 | isakmp_sa->recv_certtype); |
| 298 | goto policydone; |
| 299 | } |
| 300 | |
| 301 | /* |
| 302 | * Add the authorizer (who is requesting the SA/ID); |
| 303 | * this may be a public or a secret key, depending on |
| 304 | * what mode of authentication we used in Phase 1. |
| 305 | */ |
| 306 | for (i = 0; i < nprinc; i++) { |
| 307 | LOG_DBG((LOG_POLICY, 40, "check_policy: "log_debug (LOG_POLICY, 40, "check_policy: " "adding authorizer [%s]" , principal[i]) |
| 308 | "adding authorizer [%s]", principal[i]))log_debug (LOG_POLICY, 40, "check_policy: " "adding authorizer [%s]" , principal[i]); |
| 309 | |
| 310 | if (kn_add_authorizer(isakmp_sa->policy_id, principal[i]) |
| 311 | == -1) { |
| 312 | int j; |
| 313 | |
| 314 | for (j = 0; j < i; j++) |
| 315 | kn_remove_authorizer(isakmp_sa->policy_id, |
| 316 | principal[j]); |
| 317 | log_print("check_policy: kn_add_authorizer failed"); |
| 318 | goto policydone; |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | /* Ask policy */ |
| 323 | result = kn_do_query(isakmp_sa->policy_id, return_values, |
| 324 | RETVALUES_NUM2); |
| 325 | LOG_DBG((LOG_POLICY, 40, "check_policy: kn_do_query returned %d",log_debug (LOG_POLICY, 40, "check_policy: kn_do_query returned %d" , result) |
| 326 | result))log_debug (LOG_POLICY, 40, "check_policy: kn_do_query returned %d" , result); |
| 327 | |
| 328 | /* Cleanup environment */ |
| 329 | kn_cleanup_action_environment(isakmp_sa->policy_id); |
| 330 | |
| 331 | /* Remove authorizers from the session */ |
| 332 | for (i = 0; i < nprinc; i++) { |
| 333 | kn_remove_authorizer(isakmp_sa->policy_id, principal[i]); |
| 334 | free(principal[i]); |
| 335 | } |
| 336 | |
| 337 | free(principal); |
| 338 | principal = 0; |
| 339 | nprinc = 0; |
| 340 | |
| 341 | /* Check what policy said. */ |
| 342 | if (result < 0) { |
| 343 | LOG_DBG((LOG_POLICY, 40, "check_policy: proposal refused"))log_debug (LOG_POLICY, 40, "check_policy: proposal refused"); |
| 344 | result = 0; |
| 345 | goto policydone; |
| 346 | } |
| 347 | policydone: |
| 348 | for (i = 0; i < nprinc; i++) |
| 349 | if (principal && principal[i]) |
| 350 | free(principal[i]); |
| 351 | |
| 352 | free(principal); |
| 353 | |
| 354 | /* Remove the policies */ |
| 355 | for (i = 0; i < policy_asserts_num; i++) { |
| 356 | if (keynote_ids[i] != -1) |
| 357 | kn_remove_assertion(isakmp_sa->policy_id, |
| 358 | keynote_ids[i]); |
| 359 | } |
| 360 | |
| 361 | free(keynote_ids); |
| 362 | |
| 363 | free(x509_ids); |
| 364 | |
| 365 | /* |
| 366 | * XXX Currently, check_policy() is only called from |
| 367 | * message_negotiate_sa(), and so this log message reflects this. |
| 368 | * Change to something better? |
| 369 | */ |
| 370 | if (result == 0) |
| 371 | log_print("check_policy: negotiated SA failed policy check"); |
| 372 | |
| 373 | /* |
| 374 | * Given that we have only 2 return values from policy (true/false) |
| 375 | * we can just return the query result directly (no pre-processing |
| 376 | * needed). |
| 377 | */ |
| 378 | return result; |
| 379 | } |
| 380 | |
| 381 | /* |
| 382 | * Offer several sets of transforms to the responder. |
| 383 | * XXX Split this huge function up and look for common code with main mode. |
| 384 | */ |
| 385 | static int |
| 386 | initiator_send_HASH_SA_NONCE(struct message *msg) |
| 387 | { |
| 388 | struct exchange *exchange = msg->exchange; |
| 389 | struct doi *doi = exchange->doi; |
| 390 | struct ipsec_exch *ie = exchange->data; |
| 391 | u_int8_t ***transform = 0, ***new_transform; |
| 392 | u_int8_t **proposal = 0, **new_proposal; |
| 393 | u_int8_t *sa_buf = 0, *attr, *saved_nextp_sa, *saved_nextp_prop, |
| 394 | *id, *spi; |
| 395 | size_t spi_sz, sz; |
| 396 | size_t proposal_len = 0, proposals_len = 0, sa_len; |
| 397 | size_t **transform_len = 0, **new_transform_len; |
| 398 | size_t *transforms_len = 0, *new_transforms_len; |
| 399 | u_int32_t *transform_cnt = 0, *new_transform_cnt; |
| 400 | u_int32_t suite_no, prop_no, prot_no, xf_no, prop_cnt = 0; |
| 401 | u_int32_t i; |
| 402 | int value, update_nextp, protocol_num, proto_id; |
| 403 | struct proto *proto; |
| 404 | struct conf_list *suite_conf, *prot_conf = 0, *xf_conf = 0, *life_conf; |
| 405 | struct conf_list_node *suite, *prot, *xf, *life; |
| 406 | struct constant_map *id_map; |
| 407 | char *protocol_id, *transform_id; |
| 408 | char *local_id, *remote_id; |
| 409 | char *name; |
| 410 | int group_desc = -1, new_group_desc; |
| 411 | struct ipsec_sa *isa = msg->isakmp_sa->data; |
| 412 | struct hash *hash = hash_get(isa->hash); |
| 413 | struct sockaddr *src; |
| 414 | struct proto_attr *pa; |
| 415 | |
| 416 | if (!ipsec_add_hash_payload(msg, hash->hashsize)) |
| 417 | return -1; |
| 418 | |
| 419 | /* Get the list of protocol suites. */ |
| 420 | suite_conf = conf_get_list(exchange->policy, "Suites"); |
| 421 | if (!suite_conf) |
| 422 | return -1; |
| 423 | |
| 424 | for (suite = TAILQ_FIRST(&suite_conf->fields)((&suite_conf->fields)->tqh_first), suite_no = prop_no = 0; |
| 425 | suite_no < suite_conf->cnt; |
| 426 | suite_no++, suite = TAILQ_NEXT(suite, link)((suite)->link.tqe_next)) { |
| 427 | /* Now get each protocol in this specific protocol suite. */ |
| 428 | prot_conf = conf_get_list(suite->field, "Protocols"); |
| 429 | if (!prot_conf) |
| 430 | goto bail_out; |
| 431 | |
| 432 | for (prot = TAILQ_FIRST(&prot_conf->fields)((&prot_conf->fields)->tqh_first), prot_no = 0; |
| 433 | prot_no < prot_conf->cnt; |
| 434 | prot_no++, prot = TAILQ_NEXT(prot, link)((prot)->link.tqe_next)) { |
| 435 | /* Make sure we have a proposal/transform vectors. */ |
| 436 | if (prop_no >= prop_cnt) { |
| 437 | /* |
| 438 | * This resize algorithm is completely |
| 439 | * arbitrary. |
| 440 | */ |
| 441 | prop_cnt = 2 * prop_cnt + 10; |
| 442 | new_proposal = reallocarray(proposal, |
| 443 | prop_cnt, sizeof *proposal); |
| 444 | if (!new_proposal) { |
| 445 | log_error( |
| 446 | "initiator_send_HASH_SA_NONCE: " |
| 447 | "realloc (%p, %lu) failed", |
| 448 | proposal, |
| 449 | prop_cnt * (unsigned long)sizeof *proposal); |
| 450 | goto bail_out; |
| 451 | } |
| 452 | proposal = new_proposal; |
| 453 | |
| 454 | new_transforms_len = reallocarray(transforms_len, |
| 455 | prop_cnt, sizeof *transforms_len); |
| 456 | if (!new_transforms_len) { |
| 457 | log_error( |
| 458 | "initiator_send_HASH_SA_NONCE: " |
| 459 | "realloc (%p, %lu) failed", |
| 460 | transforms_len, |
| 461 | prop_cnt * (unsigned long)sizeof *transforms_len); |
| 462 | goto bail_out; |
| 463 | } |
| 464 | transforms_len = new_transforms_len; |
| 465 | |
| 466 | new_transform = reallocarray(transform, |
| 467 | prop_cnt, sizeof *transform); |
| 468 | if (!new_transform) { |
| 469 | log_error( |
| 470 | "initiator_send_HASH_SA_NONCE: " |
| 471 | "realloc (%p, %lu) failed", |
| 472 | transform, |
| 473 | prop_cnt * (unsigned long)sizeof *transform); |
| 474 | goto bail_out; |
| 475 | } |
| 476 | transform = new_transform; |
| 477 | |
| 478 | new_transform_cnt = reallocarray(transform_cnt, |
| 479 | prop_cnt, sizeof *transform_cnt); |
| 480 | if (!new_transform_cnt) { |
| 481 | log_error( |
| 482 | "initiator_send_HASH_SA_NONCE: " |
| 483 | "realloc (%p, %lu) failed", |
| 484 | transform_cnt, |
| 485 | prop_cnt * (unsigned long)sizeof *transform_cnt); |
| 486 | goto bail_out; |
| 487 | } |
| 488 | transform_cnt = new_transform_cnt; |
| 489 | |
| 490 | new_transform_len = reallocarray(transform_len, |
| 491 | prop_cnt, sizeof *transform_len); |
| 492 | if (!new_transform_len) { |
| 493 | log_error( |
| 494 | "initiator_send_HASH_SA_NONCE: " |
| 495 | "realloc (%p, %lu) failed", |
| 496 | transform_len, |
| 497 | prop_cnt * (unsigned long)sizeof *transform_len); |
| 498 | goto bail_out; |
| 499 | } |
| 500 | transform_len = new_transform_len; |
| 501 | } |
| 502 | protocol_id = conf_get_str(prot->field, "PROTOCOL_ID"); |
| 503 | if (!protocol_id) |
| 504 | goto bail_out; |
| 505 | |
| 506 | proto_id = constant_value(ipsec_proto_cst, |
| 507 | protocol_id); |
| 508 | switch (proto_id) { |
| 509 | case IPSEC_PROTO_IPSEC_AH2: |
| 510 | id_map = ipsec_ah_cst; |
| 511 | break; |
| 512 | |
| 513 | case IPSEC_PROTO_IPSEC_ESP3: |
| 514 | id_map = ipsec_esp_cst; |
| 515 | break; |
| 516 | |
| 517 | case IPSEC_PROTO_IPCOMP4: |
| 518 | id_map = ipsec_ipcomp_cst; |
| 519 | break; |
| 520 | |
| 521 | default: |
| 522 | { |
| 523 | log_print("initiator_send_HASH_SA_NONCE: " |
| 524 | "invalid PROTCOL_ID: %s", protocol_id); |
| 525 | goto bail_out; |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | /* Now get each transform we offer for this protocol.*/ |
| 530 | xf_conf = conf_get_list(prot->field, "Transforms"); |
| 531 | if (!xf_conf) |
| 532 | goto bail_out; |
| 533 | transform_cnt[prop_no] = xf_conf->cnt; |
| 534 | |
| 535 | transform[prop_no] = calloc(transform_cnt[prop_no], |
| 536 | sizeof **transform); |
| 537 | if (!transform[prop_no]) { |
| 538 | log_error("initiator_send_HASH_SA_NONCE: " |
| 539 | "calloc (%d, %lu) failed", |
| 540 | transform_cnt[prop_no], |
| 541 | (unsigned long)sizeof **transform); |
| 542 | goto bail_out; |
| 543 | } |
| 544 | transform_len[prop_no] = calloc(transform_cnt[prop_no], |
| 545 | sizeof **transform_len); |
| 546 | if (!transform_len[prop_no]) { |
| 547 | log_error("initiator_send_HASH_SA_NONCE: " |
| 548 | "calloc (%d, %lu) failed", |
| 549 | transform_cnt[prop_no], |
| 550 | (unsigned long)sizeof **transform_len); |
| 551 | goto bail_out; |
| 552 | } |
| 553 | transforms_len[prop_no] = 0; |
| 554 | for (xf = TAILQ_FIRST(&xf_conf->fields)((&xf_conf->fields)->tqh_first), xf_no = 0; |
| 555 | xf_no < transform_cnt[prop_no]; |
| 556 | xf_no++, xf = TAILQ_NEXT(xf, link)((xf)->link.tqe_next)) { |
| 557 | |
| 558 | /* XXX The sizing needs to be dynamic. */ |
| 559 | transform[prop_no][xf_no] = |
| 560 | calloc(ISAKMP_TRANSFORM_SA_ATTRS_OFF8 + |
| 561 | 9 * ISAKMP_ATTR_VALUE_OFF4, 1); |
| 562 | if (!transform[prop_no][xf_no]) { |
| 563 | log_error( |
| 564 | "initiator_send_HASH_SA_NONCE: " |
| 565 | "calloc (%d, 1) failed", |
| 566 | ISAKMP_TRANSFORM_SA_ATTRS_OFF8 + |
| 567 | 9 * ISAKMP_ATTR_VALUE_OFF4); |
| 568 | goto bail_out; |
| 569 | } |
| 570 | SET_ISAKMP_TRANSFORM_NO(transform[prop_no][xf_no],field_set_num (isakmp_transform_fld + 0, transform[prop_no][xf_no ], xf_no + 1) |
| 571 | xf_no + 1)field_set_num (isakmp_transform_fld + 0, transform[prop_no][xf_no ], xf_no + 1); |
| 572 | |
| 573 | transform_id = conf_get_str(xf->field, |
| 574 | "TRANSFORM_ID"); |
| 575 | if (!transform_id) |
| 576 | goto bail_out; |
| 577 | SET_ISAKMP_TRANSFORM_ID(transform[prop_no][xf_no],field_set_num (isakmp_transform_fld + 1, transform[prop_no][xf_no ], constant_value(id_map, transform_id)) |
| 578 | constant_value(id_map, transform_id))field_set_num (isakmp_transform_fld + 1, transform[prop_no][xf_no ], constant_value(id_map, transform_id)); |
| 579 | SET_ISAKMP_TRANSFORM_RESERVED(transform[prop_no][xf_no], 0)field_set_num (isakmp_transform_fld + 2, transform[prop_no][xf_no ], 0); |
| 580 | |
| 581 | attr = transform[prop_no][xf_no] + |
| 582 | ISAKMP_TRANSFORM_SA_ATTRS_OFF8; |
| 583 | |
| 584 | /* |
| 585 | * Life durations are special, we should be |
| 586 | * able to specify several, one per type. |
| 587 | */ |
| 588 | life_conf = conf_get_list(xf->field, "Life"); |
| 589 | if (life_conf) { |
| 590 | for (life = TAILQ_FIRST(&life_conf->fields)((&life_conf->fields)->tqh_first); |
| 591 | life; life = TAILQ_NEXT(life, link)((life)->link.tqe_next)) { |
| 592 | attribute_set_constant( |
| 593 | life->field, "LIFE_TYPE", |
| 594 | ipsec_duration_cst, |
| 595 | IPSEC_ATTR_SA_LIFE_TYPE1, |
| 596 | &attr); |
| 597 | |
| 598 | /* |
| 599 | * XXX Deals with 16 and 32 |
| 600 | * bit lifetimes only |
| 601 | */ |
| 602 | value = |
| 603 | conf_get_num(life->field, |
| 604 | "LIFE_DURATION", 0); |
| 605 | if (value) { |
| 606 | if (value <= 0xffff) |
| 607 | attr = |
| 608 | attribute_set_basic( |
| 609 | attr, |
| 610 | IPSEC_ATTR_SA_LIFE_DURATION2, |
| 611 | value); |
| 612 | else { |
| 613 | value = htonl(value)(__uint32_t)(__builtin_constant_p(value) ? (__uint32_t)(((__uint32_t )(value) & 0xff) << 24 | ((__uint32_t)(value) & 0xff00) << 8 | ((__uint32_t)(value) & 0xff0000) >> 8 | ((__uint32_t)(value) & 0xff000000) >> 24) : __swap32md (value)); |
| 614 | attr = |
| 615 | attribute_set_var( |
| 616 | attr, |
| 617 | IPSEC_ATTR_SA_LIFE_DURATION2, |
| 618 | (u_int8_t *)&value, |
| 619 | sizeof value); |
| 620 | } |
| 621 | } |
| 622 | } |
| 623 | conf_free_list(life_conf); |
| 624 | } |
| 625 | |
| 626 | if (proto_id == IPSEC_PROTO_IPSEC_ESP3 && |
| 627 | (exchange->flags & |
| 628 | EXCHANGE_FLAG_NAT_T_ENABLE0x0010)) { |
| 629 | name = conf_get_str(xf->field, |
| 630 | "ENCAPSULATION_MODE"); |
| 631 | if (name) { |
| 632 | value = constant_value( |
| 633 | ipsec_encap_cst, |
| 634 | name); |
| 635 | switch (value) { |
| 636 | case IPSEC_ENCAP_TUNNEL1: |
| 637 | value = exchange->flags & EXCHANGE_FLAG_NAT_T_DRAFT0x0100 ? |
| 638 | IPSEC_ENCAP_UDP_ENCAP_TUNNEL_DRAFT61443 : |
| 639 | IPSEC_ENCAP_UDP_ENCAP_TUNNEL3; |
| 640 | break; |
| 641 | case IPSEC_ENCAP_TRANSPORT2: |
| 642 | value = exchange->flags & EXCHANGE_FLAG_NAT_T_DRAFT0x0100 ? |
| 643 | IPSEC_ENCAP_UDP_ENCAP_TRANSPORT_DRAFT61444 : |
| 644 | IPSEC_ENCAP_UDP_ENCAP_TRANSPORT4; |
| 645 | break; |
| 646 | } |
| 647 | attr = attribute_set_basic( |
| 648 | attr, |
| 649 | IPSEC_ATTR_ENCAPSULATION_MODE4, |
| 650 | value); |
| 651 | } |
| 652 | } else { |
| 653 | attribute_set_constant(xf->field, |
| 654 | "ENCAPSULATION_MODE", |
| 655 | ipsec_encap_cst, |
| 656 | IPSEC_ATTR_ENCAPSULATION_MODE4, |
| 657 | &attr); |
| 658 | } |
| 659 | |
| 660 | if (proto_id != IPSEC_PROTO_IPCOMP4) { |
| 661 | attribute_set_constant(xf->field, |
| 662 | "AUTHENTICATION_ALGORITHM", |
| 663 | ipsec_auth_cst, |
| 664 | IPSEC_ATTR_AUTHENTICATION_ALGORITHM5, |
| 665 | &attr); |
| 666 | |
| 667 | attribute_set_constant(xf->field, |
| 668 | "GROUP_DESCRIPTION", |
| 669 | ike_group_desc_cst, |
| 670 | IPSEC_ATTR_GROUP_DESCRIPTION3, &attr); |
| 671 | |
| 672 | value = conf_get_num(xf->field, |
| 673 | "KEY_LENGTH", 0); |
| 674 | if (value) |
| 675 | attr = attribute_set_basic( |
| 676 | attr, |
| 677 | IPSEC_ATTR_KEY_LENGTH6, |
| 678 | value); |
| 679 | |
| 680 | value = conf_get_num(xf->field, |
| 681 | "KEY_ROUNDS", 0); |
| 682 | if (value) |
| 683 | attr = attribute_set_basic( |
| 684 | attr, |
| 685 | IPSEC_ATTR_KEY_ROUNDS7, |
| 686 | value); |
| 687 | } else { |
| 688 | value = conf_get_num(xf->field, |
| 689 | "COMPRESS_DICTIONARY_SIZE", 0); |
| 690 | if (value) |
| 691 | attr = attribute_set_basic( |
| 692 | attr, |
| 693 | IPSEC_ATTR_COMPRESS_DICTIONARY_SIZE8, |
| 694 | value); |
| 695 | |
| 696 | value = conf_get_num(xf->field, |
| 697 | "COMPRESS_PRIVATE_ALGORITHM", 0); |
| 698 | if (value) |
| 699 | attr = attribute_set_basic( |
| 700 | attr, |
| 701 | IPSEC_ATTR_COMPRESS_PRIVATE_ALGORITHM9, |
| 702 | value); |
| 703 | } |
| 704 | |
| 705 | value = conf_get_num(xf->field, "ECN_TUNNEL", |
| 706 | 0); |
| 707 | if (value) |
| 708 | attr = attribute_set_basic(attr, |
| 709 | IPSEC_ATTR_ECN_TUNNEL10, value); |
| 710 | |
| 711 | /* Record the real transform size. */ |
| 712 | transforms_len[prop_no] += |
| 713 | (transform_len[prop_no][xf_no] |
| 714 | = attr - transform[prop_no][xf_no]); |
| 715 | |
| 716 | if (proto_id != IPSEC_PROTO_IPCOMP4) { |
| 717 | /* |
| 718 | * Make sure that if a group |
| 719 | * description is specified, it is |
| 720 | * specified for all transforms |
| 721 | * equally. |
| 722 | */ |
| 723 | attr = |
| 724 | (u_int8_t *)conf_get_str(xf->field, |
| 725 | "GROUP_DESCRIPTION"); |
| 726 | new_group_desc |
| 727 | = attr ? constant_value(ike_group_desc_cst, |
| 728 | (char *)attr) : 0; |
| 729 | if (group_desc == -1) |
| 730 | group_desc = new_group_desc; |
| 731 | else if (group_desc != new_group_desc) { |
| 732 | log_print("initiator_send_HASH_SA_NONCE: " |
| 733 | "differing group descriptions in a proposal"); |
| 734 | goto bail_out; |
| 735 | } |
| 736 | } |
| 737 | } |
| 738 | conf_free_list(xf_conf); |
| 739 | xf_conf = 0; |
| 740 | |
| 741 | /* |
| 742 | * Get SPI from application. |
| 743 | * XXX Should we care about unknown constants? |
| 744 | */ |
| 745 | protocol_num = constant_value(ipsec_proto_cst, |
| 746 | protocol_id); |
| 747 | spi = doi->get_spi(&spi_sz, protocol_num, msg); |
| 748 | if (spi_sz && !spi) { |
| 749 | log_print("initiator_send_HASH_SA_NONCE: " |
| 750 | "doi->get_spi failed"); |
| 751 | goto bail_out; |
| 752 | } |
| 753 | proposal_len = ISAKMP_PROP_SPI_OFF8 + spi_sz; |
| 754 | proposals_len += |
| 755 | proposal_len + transforms_len[prop_no]; |
| 756 | proposal[prop_no] = malloc(proposal_len); |
| 757 | if (!proposal[prop_no]) { |
| 758 | log_error("initiator_send_HASH_SA_NONCE: " |
| 759 | "malloc (%lu) failed", |
| 760 | (unsigned long)proposal_len); |
| 761 | goto bail_out; |
| 762 | } |
| 763 | SET_ISAKMP_PROP_NO(proposal[prop_no], suite_no + 1)field_set_num (isakmp_prop_fld + 0, proposal[prop_no], suite_no + 1); |
| 764 | SET_ISAKMP_PROP_PROTO(proposal[prop_no], protocol_num)field_set_num (isakmp_prop_fld + 1, proposal[prop_no], protocol_num ); |
| 765 | |
| 766 | /* XXX I would like to see this factored out. */ |
| 767 | proto = calloc(1, sizeof *proto); |
| 768 | if (!proto) { |
| 769 | log_error("initiator_send_HASH_SA_NONCE: " |
| 770 | "calloc (1, %lu) failed", |
| 771 | (unsigned long)sizeof *proto); |
| 772 | goto bail_out; |
| 773 | } |
| 774 | if (doi->proto_size) { |
| 775 | proto->data = calloc(1, doi->proto_size); |
| 776 | if (!proto->data) { |
| 777 | free(proto); |
| 778 | log_error( |
| 779 | "initiator_send_HASH_SA_NONCE: " |
| 780 | "calloc (1, %lu) failed", |
| 781 | (unsigned long)doi->proto_size); |
| 782 | goto bail_out; |
| 783 | } |
| 784 | } |
| 785 | proto->no = suite_no + 1; |
| 786 | proto->proto = protocol_num; |
| 787 | proto->sa = TAILQ_FIRST(&exchange->sa_list)((&exchange->sa_list)->tqh_first); |
| 788 | proto->xf_cnt = transform_cnt[prop_no]; |
| 789 | TAILQ_INIT(&proto->xfs)do { (&proto->xfs)->tqh_first = ((void*)0); (&proto ->xfs)->tqh_last = &(&proto->xfs)->tqh_first ; } while (0); |
| 790 | for (xf_no = 0; xf_no < proto->xf_cnt; xf_no++) { |
| 791 | pa = calloc(1, sizeof *pa); |
| 792 | if (!pa) { |
| 793 | free(proto->data); |
| 794 | free(proto); |
| 795 | goto bail_out; |
| 796 | } |
| 797 | pa->len = transform_len[prop_no][xf_no]; |
| 798 | pa->attrs = malloc(pa->len); |
| 799 | if (!pa->attrs) { |
| 800 | free(proto->data); |
| 801 | free(proto); |
| 802 | free(pa); |
| 803 | goto bail_out; |
| 804 | } |
| 805 | memcpy(pa->attrs, transform[prop_no][xf_no], |
| 806 | pa->len); |
| 807 | TAILQ_INSERT_TAIL(&proto->xfs, pa, next)do { (pa)->next.tqe_next = ((void*)0); (pa)->next.tqe_prev = (&proto->xfs)->tqh_last; *(&proto->xfs)-> tqh_last = (pa); (&proto->xfs)->tqh_last = &(pa )->next.tqe_next; } while (0); |
| 808 | } |
| 809 | TAILQ_INSERT_TAIL(&TAILQ_FIRST(&exchange->sa_list)->protos,do { (proto)->link.tqe_next = ((void*)0); (proto)->link .tqe_prev = (&((&exchange->sa_list)->tqh_first) ->protos)->tqh_last; *(&((&exchange->sa_list )->tqh_first)->protos)->tqh_last = (proto); (&(( &exchange->sa_list)->tqh_first)->protos)->tqh_last = &(proto)->link.tqe_next; } while (0) |
| 810 | proto, link)do { (proto)->link.tqe_next = ((void*)0); (proto)->link .tqe_prev = (&((&exchange->sa_list)->tqh_first) ->protos)->tqh_last; *(&((&exchange->sa_list )->tqh_first)->protos)->tqh_last = (proto); (&(( &exchange->sa_list)->tqh_first)->protos)->tqh_last = &(proto)->link.tqe_next; } while (0); |
| 811 | |
| 812 | /* Setup the incoming SPI. */ |
| 813 | SET_ISAKMP_PROP_SPI_SZ(proposal[prop_no], spi_sz)field_set_num (isakmp_prop_fld + 2, proposal[prop_no], spi_sz ); |
| 814 | memcpy(proposal[prop_no] + ISAKMP_PROP_SPI_OFF8, spi, |
| 815 | spi_sz); |
| 816 | proto->spi_sz[1] = spi_sz; |
| 817 | proto->spi[1] = spi; |
| 818 | |
| 819 | /* |
| 820 | * Let the DOI get at proto for initializing its own |
| 821 | * data. |
| 822 | */ |
| 823 | if (doi->proto_init) |
| 824 | doi->proto_init(proto, prot->field); |
| 825 | |
| 826 | SET_ISAKMP_PROP_NTRANSFORMS(proposal[prop_no],field_set_num (isakmp_prop_fld + 3, proposal[prop_no], transform_cnt [prop_no]) |
| 827 | transform_cnt[prop_no])field_set_num (isakmp_prop_fld + 3, proposal[prop_no], transform_cnt [prop_no]); |
| 828 | prop_no++; |
| 829 | } |
| 830 | conf_free_list(prot_conf); |
| 831 | prot_conf = 0; |
| 832 | } |
| 833 | |
| 834 | sa_len = ISAKMP_SA_SIT_OFF8 + IPSEC_SIT_SIT_LEN4; |
| 835 | sa_buf = malloc(sa_len); |
| 836 | if (!sa_buf) { |
| 837 | log_error("initiator_send_HASH_SA_NONCE: malloc (%lu) failed", |
| 838 | (unsigned long)sa_len); |
| 839 | goto bail_out; |
| 840 | } |
| 841 | SET_ISAKMP_SA_DOI(sa_buf, IPSEC_DOI_IPSEC)field_set_num (isakmp_sa_fld + 0, sa_buf, 1); |
| 842 | SET_IPSEC_SIT_SIT(sa_buf + ISAKMP_SA_SIT_OFF, IPSEC_SIT_IDENTITY_ONLY)field_set_num (ipsec_sit_fld + 0, sa_buf + 8, 1); |
| 843 | |
| 844 | /* |
| 845 | * Add the payloads. As this is a SA, we need to recompute the |
| 846 | * lengths of the payloads containing others. We also need to |
| 847 | * reset these payload's "next payload type" field. |
| 848 | */ |
| 849 | if (message_add_payload(msg, ISAKMP_PAYLOAD_SA1, sa_buf, sa_len, 1)) |
| 850 | goto bail_out; |
| 851 | SET_ISAKMP_GEN_LENGTH(sa_buf, sa_len + proposals_len)field_set_num (isakmp_gen_fld + 2, sa_buf, sa_len + proposals_len ); |
| 852 | sa_buf = 0; |
| 853 | |
| 854 | update_nextp = 0; |
| 855 | saved_nextp_sa = msg->nextp; |
| 856 | for (i = 0; i < prop_no; i++) { |
| 857 | if (message_add_payload(msg, ISAKMP_PAYLOAD_PROPOSAL2, |
| 858 | proposal[i], proposal_len, update_nextp)) |
| 859 | goto bail_out; |
| 860 | SET_ISAKMP_GEN_LENGTH(proposal[i],field_set_num (isakmp_gen_fld + 2, proposal[i], proposal_len + transforms_len[i]) |
| 861 | proposal_len + transforms_len[i])field_set_num (isakmp_gen_fld + 2, proposal[i], proposal_len + transforms_len[i]); |
| 862 | proposal[i] = 0; |
| 863 | |
| 864 | update_nextp = 0; |
| 865 | saved_nextp_prop = msg->nextp; |
| 866 | for (xf_no = 0; xf_no < transform_cnt[i]; xf_no++) { |
| 867 | if (message_add_payload(msg, ISAKMP_PAYLOAD_TRANSFORM3, |
| 868 | transform[i][xf_no], |
| 869 | transform_len[i][xf_no], update_nextp)) |
| 870 | goto bail_out; |
| 871 | update_nextp = 1; |
| 872 | transform[i][xf_no] = 0; |
| 873 | } |
| 874 | msg->nextp = saved_nextp_prop; |
| 875 | update_nextp = 1; |
| 876 | } |
| 877 | msg->nextp = saved_nextp_sa; |
| 878 | |
| 879 | /* |
| 880 | * Save SA payload body in ie->sa_i_b, length ie->sa_i_b_len. |
| 881 | */ |
| 882 | ie->sa_i_b = message_copy(msg, ISAKMP_GEN_SZ4, &ie->sa_i_b_len); |
| 883 | if (!ie->sa_i_b) |
| 884 | goto bail_out; |
| 885 | |
| 886 | /* |
| 887 | * Generate a nonce, and add it to the message. |
| 888 | * XXX I want a better way to specify the nonce's size. |
| 889 | */ |
| 890 | if (exchange_gen_nonce(msg, 16)) |
| 891 | return -1; |
| 892 | |
| 893 | /* Generate optional KEY_EXCH payload. */ |
| 894 | if (group_desc > 0) { |
| 895 | ie->group = group_get(group_desc); |
| 896 | ie->g_x_len = dh_getlen(ie->group); |
| 897 | |
| 898 | if (ipsec_gen_g_x(msg)) { |
| 899 | group_free(ie->group); |
| 900 | ie->group = 0; |
| 901 | return -1; |
| 902 | } |
| 903 | } |
| 904 | /* Generate optional client ID payloads. XXX Share with responder. */ |
| 905 | local_id = conf_get_str(exchange->name, "Local-ID"); |
| 906 | remote_id = conf_get_str(exchange->name, "Remote-ID"); |
| 907 | if (local_id && remote_id) { |
| 908 | id = ipsec_build_id(local_id, &sz); |
| 909 | if (!id) |
| 910 | return -1; |
| 911 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDic" , id, sz) |
| 912 | "initiator_send_HASH_SA_NONCE: IDic", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDic" , id, sz); |
| 913 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { |
| 914 | free(id); |
| 915 | return -1; |
| 916 | } |
| 917 | id = ipsec_build_id(remote_id, &sz); |
| 918 | if (!id) |
| 919 | return -1; |
| 920 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDrc" , id, sz) |
| 921 | "initiator_send_HASH_SA_NONCE: IDrc", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDrc" , id, sz); |
| 922 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { |
| 923 | free(id); |
| 924 | return -1; |
| 925 | } |
| 926 | } |
| 927 | /* XXX I do not judge these as errors, are they? */ |
| 928 | else if (local_id) |
| 929 | log_print("initiator_send_HASH_SA_NONCE: " |
| 930 | "Local-ID given without Remote-ID for \"%s\"", |
| 931 | exchange->name); |
| 932 | else if (remote_id) |
| 933 | /* |
| 934 | * This code supports the "road warrior" case, where the |
| 935 | * initiator doesn't have a fixed IP address, but wants to |
| 936 | * specify a particular remote network to talk to. -- Adrian |
| 937 | * Close <adrian@esec.com.au> |
| 938 | */ |
| 939 | { |
| 940 | log_print("initiator_send_HASH_SA_NONCE: " |
| 941 | "Remote-ID given without Local-ID for \"%s\"", |
| 942 | exchange->name); |
| 943 | |
| 944 | /* |
| 945 | * If we're here, then we are the initiator, so use initiator |
| 946 | * address for local ID |
| 947 | */ |
| 948 | msg->transport->vtbl->get_src(msg->transport, &src); |
| 949 | sz = ISAKMP_ID_SZ8 + sockaddr_addrlen(src); |
| 950 | |
| 951 | id = calloc(sz, sizeof(char)); |
| 952 | if (!id) { |
| 953 | log_error("initiator_send_HASH_SA_NONCE: " |
| 954 | "calloc (%lu, %lu) failed", (unsigned long)sz, |
| 955 | (unsigned long)sizeof(char)); |
| 956 | return -1; |
| 957 | } |
| 958 | switch (src->sa_family) { |
| 959 | case AF_INET624: |
| 960 | SET_ISAKMP_ID_TYPE(id, IPSEC_ID_IPV6_ADDR)field_set_num (isakmp_id_fld + 0, id, 5); |
| 961 | break; |
| 962 | case AF_INET2: |
| 963 | SET_ISAKMP_ID_TYPE(id, IPSEC_ID_IPV4_ADDR)field_set_num (isakmp_id_fld + 0, id, 1); |
| 964 | break; |
| 965 | default: |
| 966 | log_error("initiator_send_HASH_SA_NONCE: " |
| 967 | "unknown sa_family %d", src->sa_family); |
| 968 | free(id); |
| 969 | return -1; |
| 970 | } |
| 971 | memcpy(id + ISAKMP_ID_DATA_OFF8, sockaddr_addrdata(src), |
| 972 | sockaddr_addrlen(src)); |
| 973 | |
| 974 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDic" , id, sz) |
| 975 | "initiator_send_HASH_SA_NONCE: IDic", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDic" , id, sz); |
| 976 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { |
| 977 | free(id); |
| 978 | return -1; |
| 979 | } |
| 980 | /* Send supplied remote_id */ |
| 981 | id = ipsec_build_id(remote_id, &sz); |
| 982 | if (!id) |
| 983 | return -1; |
| 984 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDrc" , id, sz) |
| 985 | "initiator_send_HASH_SA_NONCE: IDrc", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDrc" , id, sz); |
| 986 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { |
| 987 | free(id); |
| 988 | return -1; |
| 989 | } |
| 990 | } |
| 991 | if (ipsec_fill_in_hash(msg)) |
| 992 | goto bail_out; |
| 993 | |
| 994 | conf_free_list(suite_conf); |
| 995 | for (i = 0; i < prop_no; i++) { |
| 996 | free(transform[i]); |
| 997 | free(transform_len[i]); |
| 998 | } |
| 999 | free(proposal); |
| 1000 | free(transform); |
| 1001 | free(transforms_len); |
| 1002 | free(transform_len); |
| 1003 | free(transform_cnt); |
| 1004 | return 0; |
| 1005 | |
| 1006 | bail_out: |
| 1007 | free(sa_buf); |
| 1008 | if (proposal) { |
| 1009 | for (i = 0; i < prop_no; i++) { |
| 1010 | free(proposal[i]); |
| 1011 | if (transform[i]) { |
| 1012 | for (xf_no = 0; xf_no < transform_cnt[i]; |
| 1013 | xf_no++) |
| 1014 | free(transform[i][xf_no]); |
| 1015 | free(transform[i]); |
| 1016 | } |
| 1017 | free(transform_len[i]); |
| 1018 | } |
| 1019 | free(proposal); |
| 1020 | free(transforms_len); |
| 1021 | free(transform); |
| 1022 | free(transform_len); |
| 1023 | free(transform_cnt); |
| 1024 | } |
| 1025 | if (xf_conf) |
| 1026 | conf_free_list(xf_conf); |
| 1027 | if (prot_conf) |
| 1028 | conf_free_list(prot_conf); |
| 1029 | conf_free_list(suite_conf); |
| 1030 | return -1; |
| 1031 | } |
| 1032 | |
| 1033 | /* Figure out what transform the responder chose. */ |
| 1034 | static int |
| 1035 | initiator_recv_HASH_SA_NONCE(struct message *msg) |
| 1036 | { |
| 1037 | struct exchange *exchange = msg->exchange; |
| 1038 | struct ipsec_exch *ie = exchange->data; |
| 1039 | struct sa *sa; |
| 1040 | struct proto *proto, *next_proto; |
| 1041 | struct payload *sa_p = payload_first(msg, ISAKMP_PAYLOAD_SA1); |
| 1042 | struct payload *xf, *idp; |
| 1043 | struct payload *hashp = payload_first(msg, ISAKMP_PAYLOAD_HASH8); |
| 1044 | struct payload *kep = payload_first(msg, ISAKMP_PAYLOAD_KEY_EXCH4); |
| 1045 | struct prf *prf; |
| 1046 | struct sa *isakmp_sa = msg->isakmp_sa; |
| 1047 | struct ipsec_sa *isa = isakmp_sa->data; |
| 1048 | struct hash *hash = hash_get(isa->hash); |
| 1049 | u_int8_t *rest; |
| 1050 | size_t rest_len; |
| 1051 | struct sockaddr *src, *dst; |
| 1052 | |
| 1053 | /* Allocate the prf and start calculating our HASH(1). XXX Share? */ |
| 1054 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: "log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: " "SKEYID_a", (u_int8_t *)isa->skeyid_a, isa->skeyid_len ) |
| 1055 | "SKEYID_a", (u_int8_t *)isa->skeyid_a, isa->skeyid_len))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: " "SKEYID_a", (u_int8_t *)isa->skeyid_a, isa->skeyid_len ); |
| 1056 | prf = prf_alloc(isa->prf_type, hash->type, isa->skeyid_a, |
| 1057 | isa->skeyid_len); |
| 1058 | if (!prf) |
| 1059 | return -1; |
| 1060 | |
| 1061 | prf->Init(prf->prfctx); |
| 1062 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: message_id" , exchange->message_id, 4) |
| 1063 | "initiator_recv_HASH_SA_NONCE: message_id",log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: message_id" , exchange->message_id, 4) |
| 1064 | exchange->message_id, ISAKMP_HDR_MESSAGE_ID_LEN))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: message_id" , exchange->message_id, 4); |
| 1065 | prf->Update(prf->prfctx, exchange->message_id, |
| 1066 | ISAKMP_HDR_MESSAGE_ID_LEN4); |
| 1067 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: "log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: " "NONCE_I_b", exchange->nonce_i, exchange->nonce_i_len) |
| 1068 | "NONCE_I_b", exchange->nonce_i, exchange->nonce_i_len))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: " "NONCE_I_b", exchange->nonce_i, exchange->nonce_i_len); |
| 1069 | prf->Update(prf->prfctx, exchange->nonce_i, exchange->nonce_i_len); |
| 1070 | rest = hashp->p + GET_ISAKMP_GEN_LENGTH(hashp->p)field_get_num (isakmp_gen_fld + 2, hashp->p); |
| 1071 | rest_len = (GET_ISAKMP_HDR_LENGTH(msg->iov[0].iov_base)field_get_num (isakmp_hdr_fld + 7, msg->iov[0].iov_base) |
| 1072 | - (rest - (u_int8_t *)msg->iov[0].iov_base)); |
| 1073 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: payloads after HASH(2)" , rest, rest_len) |
| 1074 | "initiator_recv_HASH_SA_NONCE: payloads after HASH(2)", rest,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: payloads after HASH(2)" , rest, rest_len) |
| 1075 | rest_len))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: payloads after HASH(2)" , rest, rest_len); |
| 1076 | prf->Update(prf->prfctx, rest, rest_len); |
| 1077 | prf->Final(hash->digest, prf->prfctx); |
| 1078 | prf_free(prf); |
| 1079 | LOG_DBG_BUF((LOG_NEGOTIATION, 80,log_debug_buf (LOG_NEGOTIATION, 80, "initiator_recv_HASH_SA_NONCE: computed HASH(2)" , hash->digest, hash->hashsize) |
| 1080 | "initiator_recv_HASH_SA_NONCE: computed HASH(2)", hash->digest,log_debug_buf (LOG_NEGOTIATION, 80, "initiator_recv_HASH_SA_NONCE: computed HASH(2)" , hash->digest, hash->hashsize) |
| 1081 | hash->hashsize))log_debug_buf (LOG_NEGOTIATION, 80, "initiator_recv_HASH_SA_NONCE: computed HASH(2)" , hash->digest, hash->hashsize); |
| 1082 | if (memcmp(hashp->p + ISAKMP_HASH_DATA_OFF4, hash->digest, |
| 1083 | hash->hashsize) != 0) { |
| 1084 | message_drop(msg, ISAKMP_NOTIFY_INVALID_HASH_INFORMATION23, 0, 1, |
| 1085 | 0); |
| 1086 | return -1; |
| 1087 | } |
| 1088 | /* Mark the HASH as handled. */ |
| 1089 | hashp->flags |= PL_MARK1; |
| 1090 | |
| 1091 | /* Mark message as authenticated. */ |
| 1092 | msg->flags |= MSG_AUTHENTICATED0x10; |
| 1093 | |
| 1094 | /* |
| 1095 | * As we are getting an answer on our transform offer, only one |
| 1096 | * transform should be given. |
| 1097 | * |
| 1098 | * XXX Currently we only support negotiating one SA per quick mode run. |
| 1099 | */ |
| 1100 | if (TAILQ_NEXT(sa_p, link)((sa_p)->link.tqe_next)) { |
| 1101 | log_print("initiator_recv_HASH_SA_NONCE: " |
| 1102 | "multiple SA payloads in quick mode not supported yet"); |
| 1103 | return -1; |
| 1104 | } |
| 1105 | sa = TAILQ_FIRST(&exchange->sa_list)((&exchange->sa_list)->tqh_first); |
| 1106 | |
| 1107 | /* This is here for the policy check */ |
| 1108 | if (kep) |
| 1109 | ie->pfs = 1; |
| 1110 | |
| 1111 | /* Drop message when it contains ID types we do not implement yet. */ |
| 1112 | TAILQ_FOREACH(idp, &msg->payload[ISAKMP_PAYLOAD_ID], link)for((idp) = ((&msg->payload[5])->tqh_first); (idp) != ((void*)0); (idp) = ((idp)->link.tqe_next)) { |
| 1113 | switch (GET_ISAKMP_ID_TYPE(idp->p)field_get_num (isakmp_id_fld + 0, idp->p)) { |
| 1114 | case IPSEC_ID_IPV4_ADDR1: |
| 1115 | case IPSEC_ID_IPV4_ADDR_SUBNET4: |
| 1116 | case IPSEC_ID_IPV6_ADDR5: |
| 1117 | case IPSEC_ID_IPV6_ADDR_SUBNET6: |
| 1118 | break; |
| 1119 | |
| 1120 | case IPSEC_ID_FQDN2: |
| 1121 | /* |
| 1122 | * FQDN may be used for in NAT-T with transport mode. |
| 1123 | * We can handle the message in this case. In the |
| 1124 | * other cases we'll drop the message later. |
| 1125 | */ |
| 1126 | break; |
| 1127 | |
| 1128 | default: |
| 1129 | message_drop(msg, ISAKMP_NOTIFY_INVALID_ID_INFORMATION18, |
| 1130 | 0, 1, 0); |
| 1131 | return -1; |
| 1132 | } |
| 1133 | } |
| 1134 | |
| 1135 | /* Handle optional client ID payloads. */ |
| 1136 | idp = payload_first(msg, ISAKMP_PAYLOAD_ID5); |
| 1137 | if (idp) { |
| 1138 | /* If IDci is there, IDcr must be too. */ |
| 1139 | if (!TAILQ_NEXT(idp, link)((idp)->link.tqe_next)) { |
| 1140 | /* XXX Is this a good notify type? */ |
| 1141 | message_drop(msg, ISAKMP_NOTIFY_PAYLOAD_MALFORMED16, 0, |
| 1142 | 1, 0); |
| 1143 | return -1; |
| 1144 | } |
| 1145 | /* XXX We should really compare, not override. */ |
| 1146 | ie->id_ci_sz = GET_ISAKMP_GEN_LENGTH(idp->p)field_get_num (isakmp_gen_fld + 2, idp->p); |
| 1147 | ie->id_ci = malloc(ie->id_ci_sz); |
| 1148 | if (!ie->id_ci) { |
| 1149 | log_error("initiator_recv_HASH_SA_NONCE: " |
| 1150 | "malloc (%lu) failed", |
| 1151 | (unsigned long)ie->id_ci_sz); |
| 1152 | return -1; |
| 1153 | } |
| 1154 | memcpy(ie->id_ci, idp->p, ie->id_ci_sz); |
| 1155 | idp->flags |= PL_MARK1; |
| 1156 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: IDci" , ie->id_ci + 4, ie->id_ci_sz - 4) |
| 1157 | "initiator_recv_HASH_SA_NONCE: IDci",log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: IDci" , ie->id_ci + 4, ie->id_ci_sz - 4) |
| 1158 | ie->id_ci + ISAKMP_GEN_SZ, ie->id_ci_sz - ISAKMP_GEN_SZ))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: IDci" , ie->id_ci + 4, ie->id_ci_sz - 4); |
| 1159 | |
| 1160 | idp = TAILQ_NEXT(idp, link)((idp)->link.tqe_next); |
| 1161 | ie->id_cr_sz = GET_ISAKMP_GEN_LENGTH(idp->p)field_get_num (isakmp_gen_fld + 2, idp->p); |
| 1162 | ie->id_cr = malloc(ie->id_cr_sz); |
| 1163 | if (!ie->id_cr) { |
| 1164 | log_error("initiator_recv_HASH_SA_NONCE: " |
| 1165 | "malloc (%lu) failed", |
| 1166 | (unsigned long)ie->id_cr_sz); |
| 1167 | return -1; |
| 1168 | } |
| 1169 | memcpy(ie->id_cr, idp->p, ie->id_cr_sz); |
| 1170 | idp->flags |= PL_MARK1; |
| 1171 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: IDcr" , ie->id_cr + 4, ie->id_cr_sz - 4) |
| 1172 | "initiator_recv_HASH_SA_NONCE: IDcr",log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: IDcr" , ie->id_cr + 4, ie->id_cr_sz - 4) |
| 1173 | ie->id_cr + ISAKMP_GEN_SZ, ie->id_cr_sz - ISAKMP_GEN_SZ))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: IDcr" , ie->id_cr + 4, ie->id_cr_sz - 4); |
| 1174 | } else { |
| 1175 | /* |
| 1176 | * If client identifiers are not present in the exchange, |
| 1177 | * we fake them. RFC 2409 states: |
| 1178 | * The identities of the SAs negotiated in Quick Mode are |
| 1179 | * implicitly assumed to be the IP addresses of the ISAKMP |
| 1180 | * peers, without any constraints on the protocol or port |
| 1181 | * numbers allowed, unless client identifiers are specified |
| 1182 | * in Quick Mode. |
| 1183 | * |
| 1184 | * -- Michael Paddon (mwp@aba.net.au) |
| 1185 | */ |
| 1186 | |
| 1187 | ie->flags = IPSEC_EXCH_FLAG_NO_ID1; |
| 1188 | |
| 1189 | /* Get initiator and responder addresses. */ |
| 1190 | msg->transport->vtbl->get_src(msg->transport, &src); |
| 1191 | msg->transport->vtbl->get_dst(msg->transport, &dst); |
| 1192 | ie->id_ci_sz = ISAKMP_ID_DATA_OFF8 + sockaddr_addrlen(src); |
| 1193 | ie->id_cr_sz = ISAKMP_ID_DATA_OFF8 + sockaddr_addrlen(dst); |
| 1194 | ie->id_ci = calloc(ie->id_ci_sz, sizeof(char)); |
Result of 'calloc' is converted to a pointer of type 'u_int8_t', which is incompatible with sizeof operand type 'char' | |
| 1195 | ie->id_cr = calloc(ie->id_cr_sz, sizeof(char)); |
| 1196 | |
| 1197 | if (!ie->id_ci || !ie->id_cr) { |
| 1198 | log_error("initiator_recv_HASH_SA_NONCE: " |
| 1199 | "calloc (%lu, %lu) failed", |
| 1200 | (unsigned long)ie->id_cr_sz, |
| 1201 | (unsigned long)sizeof(char)); |
| 1202 | free(ie->id_ci); |
| 1203 | ie->id_ci = 0; |
| 1204 | free(ie->id_cr); |
| 1205 | ie->id_cr = 0; |
| 1206 | return -1; |
| 1207 | } |
| 1208 | if (src->sa_family != dst->sa_family) { |
| 1209 | log_error("initiator_recv_HASH_SA_NONCE: " |
| 1210 | "sa_family mismatch"); |
| 1211 | free(ie->id_ci); |
| 1212 | ie->id_ci = 0; |
| 1213 | free(ie->id_cr); |
| 1214 | ie->id_cr = 0; |
| 1215 | return -1; |
| 1216 | } |
| 1217 | switch (src->sa_family) { |
| 1218 | case AF_INET2: |
| 1219 | SET_ISAKMP_ID_TYPE(ie->id_ci, IPSEC_ID_IPV4_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_ci, 1); |
| 1220 | SET_ISAKMP_ID_TYPE(ie->id_cr, IPSEC_ID_IPV4_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_cr, 1); |
| 1221 | break; |
| 1222 | |
| 1223 | case AF_INET624: |
| 1224 | SET_ISAKMP_ID_TYPE(ie->id_ci, IPSEC_ID_IPV6_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_ci, 5); |
| 1225 | SET_ISAKMP_ID_TYPE(ie->id_cr, IPSEC_ID_IPV6_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_cr, 5); |
| 1226 | break; |
| 1227 | |
| 1228 | default: |
| 1229 | log_error("initiator_recv_HASH_SA_NONCE: " |
| 1230 | "unknown sa_family %d", src->sa_family); |
| 1231 | free(ie->id_ci); |
| 1232 | ie->id_ci = 0; |
| 1233 | free(ie->id_cr); |
| 1234 | ie->id_cr = 0; |
| 1235 | return -1; |
| 1236 | } |
| 1237 | memcpy(ie->id_ci + ISAKMP_ID_DATA_OFF8, sockaddr_addrdata(src), |
| 1238 | sockaddr_addrlen(src)); |
| 1239 | memcpy(ie->id_cr + ISAKMP_ID_DATA_OFF8, sockaddr_addrdata(dst), |
| 1240 | sockaddr_addrlen(dst)); |
| 1241 | } |
| 1242 | |
| 1243 | /* Build the protection suite in our SA. */ |
| 1244 | TAILQ_FOREACH(xf, &msg->payload[ISAKMP_PAYLOAD_TRANSFORM], link)for((xf) = ((&msg->payload[3])->tqh_first); (xf) != ((void*)0); (xf) = ((xf)->link.tqe_next)) { |
| 1245 | /* |
| 1246 | * XXX We could check that the proposal each transform |
| 1247 | * belongs to is unique. |
| 1248 | */ |
| 1249 | |
| 1250 | if (sa_add_transform(sa, xf, exchange->initiator, &proto)) |
| 1251 | return -1; |
| 1252 | |
| 1253 | /* XXX Check that the chosen transform matches an offer. */ |
| 1254 | |
| 1255 | ipsec_decode_transform(msg, sa, proto, xf->p); |
| 1256 | } |
| 1257 | |
| 1258 | /* Now remove offers that we don't need anymore. */ |
| 1259 | for (proto = TAILQ_FIRST(&sa->protos)((&sa->protos)->tqh_first); proto; proto = next_proto) { |
| 1260 | next_proto = TAILQ_NEXT(proto, link)((proto)->link.tqe_next); |
| 1261 | if (!proto->chosen) |
| 1262 | proto_free(proto); |
| 1263 | } |
| 1264 | |
| 1265 | if (!check_policy(exchange, sa, msg->isakmp_sa)) { |
| 1266 | message_drop(msg, ISAKMP_NOTIFY_NO_PROPOSAL_CHOSEN14, 0, 1, 0); |
| 1267 | log_print("initiator_recv_HASH_SA_NONCE: policy check failed"); |
| 1268 | return -1; |
| 1269 | } |
| 1270 | |
| 1271 | /* Mark the SA as handled. */ |
| 1272 | sa_p->flags |= PL_MARK1; |
| 1273 | |
| 1274 | isa = sa->data; |
| 1275 | if ((isa->group_desc && |
| 1276 | (!ie->group || ie->group->id != isa->group_desc)) || |
| 1277 | (!isa->group_desc && ie->group)) { |
| 1278 | log_print("initiator_recv_HASH_SA_NONCE: disagreement on PFS"); |
| 1279 | return -1; |
| 1280 | } |
| 1281 | /* Copy out the initiator's nonce. */ |
| 1282 | if (exchange_save_nonce(msg)) |
| 1283 | return -1; |
| 1284 | |
| 1285 | /* Handle the optional KEY_EXCH payload. */ |
| 1286 | if (kep && ipsec_save_g_x(msg)) |
| 1287 | return -1; |
| 1288 | |
| 1289 | return 0; |
| 1290 | } |
| 1291 | |
| 1292 | static int |
| 1293 | initiator_send_HASH(struct message *msg) |
| 1294 | { |
| 1295 | struct exchange *exchange = msg->exchange; |
| 1296 | struct ipsec_exch *ie = exchange->data; |
| 1297 | struct sa *isakmp_sa = msg->isakmp_sa; |
| 1298 | struct ipsec_sa *isa = isakmp_sa->data; |
| 1299 | struct prf *prf; |
| 1300 | u_int8_t *buf; |
| 1301 | struct hash *hash = hash_get(isa->hash); |
| 1302 | |
| 1303 | /* |
| 1304 | * We want a HASH payload to start with. XXX Share with |
| 1305 | * ike_main_mode.c? |
| 1306 | */ |
| 1307 | buf = malloc(ISAKMP_HASH_SZ4 + hash->hashsize); |
| 1308 | if (!buf) { |
| 1309 | log_error("initiator_send_HASH: malloc (%lu) failed", |
| 1310 | ISAKMP_HASH_SZ4 + (unsigned long)hash->hashsize); |
| 1311 | return -1; |
| 1312 | } |
| 1313 | if (message_add_payload(msg, ISAKMP_PAYLOAD_HASH8, buf, |
| 1314 | ISAKMP_HASH_SZ4 + hash->hashsize, 1)) { |
| 1315 | free(buf); |
| 1316 | return -1; |
| 1317 | } |
| 1318 | /* Allocate the prf and start calculating our HASH(3). XXX Share? */ |
| 1319 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "initiator_send_HASH: SKEYID_a",log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: SKEYID_a" , isa->skeyid_a, isa->skeyid_len) |
| 1320 | isa->skeyid_a, isa->skeyid_len))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: SKEYID_a" , isa->skeyid_a, isa->skeyid_len); |
| 1321 | prf = prf_alloc(isa->prf_type, isa->hash, isa->skeyid_a, |
| 1322 | isa->skeyid_len); |
| 1323 | if (!prf) |
| 1324 | return -1; |
| 1325 | prf->Init(prf->prfctx); |
| 1326 | prf->Update(prf->prfctx, (unsigned char *)"\0", 1); |
| 1327 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "initiator_send_HASH: message_id",log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: message_id" , exchange->message_id, 4) |
| 1328 | exchange->message_id, ISAKMP_HDR_MESSAGE_ID_LEN))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: message_id" , exchange->message_id, 4); |
| 1329 | prf->Update(prf->prfctx, exchange->message_id, |
| 1330 | ISAKMP_HDR_MESSAGE_ID_LEN4); |
| 1331 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "initiator_send_HASH: NONCE_I_b",log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: NONCE_I_b" , exchange->nonce_i, exchange->nonce_i_len) |
| 1332 | exchange->nonce_i, exchange->nonce_i_len))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: NONCE_I_b" , exchange->nonce_i, exchange->nonce_i_len); |
| 1333 | prf->Update(prf->prfctx, exchange->nonce_i, exchange->nonce_i_len); |
| 1334 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "initiator_send_HASH: NONCE_R_b",log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: NONCE_R_b" , exchange->nonce_r, exchange->nonce_r_len) |
| 1335 | exchange->nonce_r, exchange->nonce_r_len))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: NONCE_R_b" , exchange->nonce_r, exchange->nonce_r_len); |
| 1336 | prf->Update(prf->prfctx, exchange->nonce_r, exchange->nonce_r_len); |
| 1337 | prf->Final(buf + ISAKMP_GEN_SZ4, prf->prfctx); |
| 1338 | prf_free(prf); |
| 1339 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "initiator_send_HASH: HASH(3)",log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: HASH(3)" , buf + 4, hash->hashsize) |
| 1340 | buf + ISAKMP_GEN_SZ, hash->hashsize))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: HASH(3)" , buf + 4, hash->hashsize); |
| 1341 | |
| 1342 | if (ie->group) |
| 1343 | message_register_post_send(msg, gen_g_xy); |
| 1344 | |
| 1345 | message_register_post_send(msg, post_quick_mode); |
| 1346 | |
| 1347 | return 0; |
| 1348 | } |
| 1349 | |
| 1350 | static void |
| 1351 | post_quick_mode(struct message *msg) |
| 1352 | { |
| 1353 | struct sa *isakmp_sa = msg->isakmp_sa; |
| 1354 | struct ipsec_sa *isa = isakmp_sa->data; |
| 1355 | struct exchange *exchange = msg->exchange; |
| 1356 | struct ipsec_exch *ie = exchange->data; |
| 1357 | struct prf *prf; |
| 1358 | struct sa *sa; |
| 1359 | struct proto *proto; |
| 1360 | struct ipsec_proto *iproto; |
| 1361 | u_int8_t *keymat; |
| 1362 | int i; |
| 1363 | |
| 1364 | /* |
| 1365 | * Loop over all SA negotiations and do both an in- and an outgoing SA |
| 1366 | * per protocol. |
| 1367 | */ |
| 1368 | for (sa = TAILQ_FIRST(&exchange->sa_list)((&exchange->sa_list)->tqh_first); sa; |
| 1369 | sa = TAILQ_NEXT(sa, next)((sa)->next.tqe_next)) { |
| 1370 | for (proto = TAILQ_FIRST(&sa->protos)((&sa->protos)->tqh_first); proto; |
| 1371 | proto = TAILQ_NEXT(proto, link)((proto)->link.tqe_next)) { |
| 1372 | if (proto->proto == IPSEC_PROTO_IPCOMP4) |
| 1373 | continue; |
| 1374 | |
| 1375 | iproto = proto->data; |
| 1376 | |
| 1377 | /* |
| 1378 | * There are two SAs for each SA negotiation, |
| 1379 | * incoming and outgoing. |
| 1380 | */ |
| 1381 | for (i = 0; i < 2; i++) { |
| 1382 | prf = prf_alloc(isa->prf_type, isa->hash, |
| 1383 | isa->skeyid_d, isa->skeyid_len); |
| 1384 | if (!prf) { |
| 1385 | /* XXX What to do? */ |
| 1386 | continue; |
| 1387 | } |
| 1388 | ie->keymat_len = ipsec_keymat_length(proto); |
| 1389 | |
| 1390 | /* |
| 1391 | * We need to roundup the length of the key |
| 1392 | * material buffer to a multiple of the PRF's |
| 1393 | * blocksize as it is generated in chunks of |
| 1394 | * that blocksize. |
| 1395 | */ |
| 1396 | iproto->keymat[i] |
| 1397 | = malloc(((ie->keymat_len + prf->blocksize - 1) |
| 1398 | / prf->blocksize) * prf->blocksize); |
| 1399 | if (!iproto->keymat[i]) { |
| 1400 | log_error("post_quick_mode: " |
| 1401 | "malloc (%lu) failed", |
| 1402 | (((unsigned long)ie->keymat_len + |
| 1403 | prf->blocksize - 1) / prf->blocksize) * |
| 1404 | prf->blocksize); |
| 1405 | /* XXX What more to do? */ |
| 1406 | free(prf); |
| 1407 | continue; |
| 1408 | } |
| 1409 | for (keymat = iproto->keymat[i]; |
| 1410 | keymat < iproto->keymat[i] + ie->keymat_len; |
| 1411 | keymat += prf->blocksize) { |
| 1412 | prf->Init(prf->prfctx); |
| 1413 | |
| 1414 | if (keymat != iproto->keymat[i]) { |
| 1415 | /* |
| 1416 | * Hash in last round's |
| 1417 | * KEYMAT. |
| 1418 | */ |
| 1419 | LOG_DBG_BUF((LOG_NEGOTIATION,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "last KEYMAT" , keymat - prf->blocksize, prf->blocksize) |
| 1420 | 90, "post_quick_mode: "log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "last KEYMAT" , keymat - prf->blocksize, prf->blocksize) |
| 1421 | "last KEYMAT",log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "last KEYMAT" , keymat - prf->blocksize, prf->blocksize) |
| 1422 | keymat - prf->blocksize,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "last KEYMAT" , keymat - prf->blocksize, prf->blocksize) |
| 1423 | prf->blocksize))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "last KEYMAT" , keymat - prf->blocksize, prf->blocksize); |
| 1424 | prf->Update(prf->prfctx, |
| 1425 | keymat - prf->blocksize, |
| 1426 | prf->blocksize); |
| 1427 | } |
| 1428 | /* If PFS is used hash in g^xy. */ |
| 1429 | if (ie->g_xy) { |
| 1430 | LOG_DBG_BUF((LOG_NEGOTIATION,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "g^xy" , ie->g_xy, ie->g_xy_len) |
| 1431 | 90, "post_quick_mode: "log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "g^xy" , ie->g_xy, ie->g_xy_len) |
| 1432 | "g^xy", ie->g_xy,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "g^xy" , ie->g_xy, ie->g_xy_len) |
| 1433 | ie->g_xy_len))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "g^xy" , ie->g_xy, ie->g_xy_len); |
| 1434 | prf->Update(prf->prfctx, |
| 1435 | ie->g_xy, ie->g_xy_len); |
| 1436 | } |
| 1437 | LOG_DBG((LOG_NEGOTIATION, 90,log_debug (LOG_NEGOTIATION, 90, "post_quick_mode: " "suite %d proto %d" , proto->no, proto->proto) |
| 1438 | "post_quick_mode: "log_debug (LOG_NEGOTIATION, 90, "post_quick_mode: " "suite %d proto %d" , proto->no, proto->proto) |
| 1439 | "suite %d proto %d", proto->no,log_debug (LOG_NEGOTIATION, 90, "post_quick_mode: " "suite %d proto %d" , proto->no, proto->proto) |
| 1440 | proto->proto))log_debug (LOG_NEGOTIATION, 90, "post_quick_mode: " "suite %d proto %d" , proto->no, proto->proto); |
| 1441 | prf->Update(prf->prfctx, &proto->proto, |
| 1442 | 1); |
| 1443 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: SPI", proto ->spi[i], proto->spi_sz[i]) |
| 1444 | "post_quick_mode: SPI",log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: SPI", proto ->spi[i], proto->spi_sz[i]) |
| 1445 | proto->spi[i], proto->spi_sz[i]))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: SPI", proto ->spi[i], proto->spi_sz[i]); |
| 1446 | prf->Update(prf->prfctx, |
| 1447 | proto->spi[i], proto->spi_sz[i]); |
| 1448 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Ni_b", exchange ->nonce_i, exchange->nonce_i_len) |
| 1449 | "post_quick_mode: Ni_b",log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Ni_b", exchange ->nonce_i, exchange->nonce_i_len) |
| 1450 | exchange->nonce_i,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Ni_b", exchange ->nonce_i, exchange->nonce_i_len) |
| 1451 | exchange->nonce_i_len))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Ni_b", exchange ->nonce_i, exchange->nonce_i_len); |
| 1452 | prf->Update(prf->prfctx, |
| 1453 | exchange->nonce_i, |
| 1454 | exchange->nonce_i_len); |
| 1455 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Nr_b", exchange ->nonce_r, exchange->nonce_r_len) |
| 1456 | "post_quick_mode: Nr_b",log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Nr_b", exchange ->nonce_r, exchange->nonce_r_len) |
| 1457 | exchange->nonce_r,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Nr_b", exchange ->nonce_r, exchange->nonce_r_len) |
| 1458 | exchange->nonce_r_len))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Nr_b", exchange ->nonce_r, exchange->nonce_r_len); |
| 1459 | prf->Update(prf->prfctx, |
| 1460 | exchange->nonce_r, |
| 1461 | exchange->nonce_r_len); |
| 1462 | prf->Final(keymat, prf->prfctx); |
| 1463 | } |
| 1464 | prf_free(prf); |
| 1465 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: KEYMAT" , iproto->keymat[i], ie->keymat_len) |
| 1466 | "post_quick_mode: KEYMAT",log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: KEYMAT" , iproto->keymat[i], ie->keymat_len) |
| 1467 | iproto->keymat[i], ie->keymat_len))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: KEYMAT" , iproto->keymat[i], ie->keymat_len); |
| 1468 | } |
| 1469 | } |
| 1470 | } |
| 1471 | |
| 1472 | log_verbose("isakmpd: quick mode done%s: %s", |
| 1473 | (exchange->initiator == 0) ? " (as responder)" : "", |
| 1474 | !msg->isakmp_sa || !msg->isakmp_sa->transport ? "<no transport>" |
| 1475 | : msg->isakmp_sa->transport->vtbl->decode_ids |
| 1476 | (msg->isakmp_sa->transport)); |
| 1477 | } |
| 1478 | |
| 1479 | /* |
| 1480 | * Accept a set of transforms offered by the initiator and chose one we can |
| 1481 | * handle. |
| 1482 | * XXX Describe in more detail. |
| 1483 | */ |
| 1484 | static int |
| 1485 | responder_recv_HASH_SA_NONCE(struct message *msg) |
| 1486 | { |
| 1487 | struct payload *hashp, *kep, *idp; |
| 1488 | struct sa *sa; |
| 1489 | struct sa *isakmp_sa = msg->isakmp_sa; |
| 1490 | struct ipsec_sa *isa = isakmp_sa->data; |
| 1491 | struct exchange *exchange = msg->exchange; |
| 1492 | struct ipsec_exch *ie = exchange->data; |
| 1493 | struct prf *prf; |
| 1494 | u_int8_t *hash, *my_hash = 0; |
| 1495 | size_t hash_len; |
| 1496 | u_int8_t *pkt = msg->iov[0].iov_base; |
| 1497 | u_int8_t group_desc = 0; |
| 1498 | int retval = -1; |
| 1499 | struct proto *proto; |
| 1500 | struct sockaddr *src, *dst; |
| 1501 | char *name; |
| 1502 | |
| 1503 | hashp = payload_first(msg, ISAKMP_PAYLOAD_HASH8); |
| 1504 | hash = hashp->p; |
| 1505 | hashp->flags |= PL_MARK1; |
| 1506 | |
| 1507 | /* The HASH payload should be the first one. */ |
| 1508 | if (hash != pkt + ISAKMP_HDR_SZ28) { |
| 1509 | /* XXX Is there a better notification type? */ |
| 1510 | message_drop(msg, ISAKMP_NOTIFY_PAYLOAD_MALFORMED16, 0, 1, 0); |
| 1511 | goto cleanup; |
| 1512 | } |
| 1513 | hash_len = GET_ISAKMP_GEN_LENGTH(hash)field_get_num (isakmp_gen_fld + 2, hash); |
| 1514 | my_hash = malloc(hash_len - ISAKMP_GEN_SZ4); |
| 1515 | if (!my_hash) { |
| 1516 | log_error("responder_recv_HASH_SA_NONCE: malloc (%lu) failed", |
| 1517 | (unsigned long)hash_len - ISAKMP_GEN_SZ4); |
| 1518 | goto cleanup; |
| 1519 | } |
| 1520 | /* |
| 1521 | * Check the payload's integrity. |
| 1522 | * XXX Share with ipsec_fill_in_hash? |
| 1523 | */ |
| 1524 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: "log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: " "SKEYID_a", isa->skeyid_a, isa->skeyid_len) |
| 1525 | "SKEYID_a", isa->skeyid_a, isa->skeyid_len))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: " "SKEYID_a", isa->skeyid_a, isa->skeyid_len); |
| 1526 | prf = prf_alloc(isa->prf_type, isa->hash, isa->skeyid_a, |
| 1527 | isa->skeyid_len); |
| 1528 | if (!prf) |
| 1529 | goto cleanup; |
| 1530 | prf->Init(prf->prfctx); |
| 1531 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: message_id" , exchange->message_id, 4) |
| 1532 | "responder_recv_HASH_SA_NONCE: message_id",log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: message_id" , exchange->message_id, 4) |
| 1533 | exchange->message_id, ISAKMP_HDR_MESSAGE_ID_LEN))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: message_id" , exchange->message_id, 4); |
| 1534 | prf->Update(prf->prfctx, exchange->message_id, |
| 1535 | ISAKMP_HDR_MESSAGE_ID_LEN4); |
| 1536 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: message after HASH" , hash + hash_len, msg->iov[0].iov_len - 28 - hash_len) |
| 1537 | "responder_recv_HASH_SA_NONCE: message after HASH",log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: message after HASH" , hash + hash_len, msg->iov[0].iov_len - 28 - hash_len) |
| 1538 | hash + hash_len,log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: message after HASH" , hash + hash_len, msg->iov[0].iov_len - 28 - hash_len) |
| 1539 | msg->iov[0].iov_len - ISAKMP_HDR_SZ - hash_len))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: message after HASH" , hash + hash_len, msg->iov[0].iov_len - 28 - hash_len); |
| 1540 | prf->Update(prf->prfctx, hash + hash_len, |
| 1541 | msg->iov[0].iov_len - ISAKMP_HDR_SZ28 - hash_len); |
| 1542 | prf->Final(my_hash, prf->prfctx); |
| 1543 | prf_free(prf); |
| 1544 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: computed HASH(1)" , my_hash, hash_len - 4) |
| 1545 | "responder_recv_HASH_SA_NONCE: computed HASH(1)", my_hash,log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: computed HASH(1)" , my_hash, hash_len - 4) |
| 1546 | hash_len - ISAKMP_GEN_SZ))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: computed HASH(1)" , my_hash, hash_len - 4); |
| 1547 | if (memcmp(hash + ISAKMP_GEN_SZ4, my_hash, hash_len - ISAKMP_GEN_SZ4) |
| 1548 | != 0) { |
| 1549 | message_drop(msg, ISAKMP_NOTIFY_INVALID_HASH_INFORMATION23, 0, |
| 1550 | 1, 0); |
| 1551 | goto cleanup; |
| 1552 | } |
| 1553 | free(my_hash); |
| 1554 | my_hash = 0; |
| 1555 | |
| 1556 | /* Mark message as authenticated. */ |
| 1557 | msg->flags |= MSG_AUTHENTICATED0x10; |
| 1558 | |
| 1559 | kep = payload_first(msg, ISAKMP_PAYLOAD_KEY_EXCH4); |
| 1560 | if (kep) |
| 1561 | ie->pfs = 1; |
| 1562 | |
| 1563 | /* Drop message when it contains ID types we do not implement yet. */ |
| 1564 | TAILQ_FOREACH(idp, &msg->payload[ISAKMP_PAYLOAD_ID], link)for((idp) = ((&msg->payload[5])->tqh_first); (idp) != ((void*)0); (idp) = ((idp)->link.tqe_next)) { |
| 1565 | switch (GET_ISAKMP_ID_TYPE(idp->p)field_get_num (isakmp_id_fld + 0, idp->p)) { |
| 1566 | case IPSEC_ID_IPV4_ADDR1: |
| 1567 | case IPSEC_ID_IPV4_ADDR_SUBNET4: |
| 1568 | case IPSEC_ID_IPV6_ADDR5: |
| 1569 | case IPSEC_ID_IPV6_ADDR_SUBNET6: |
| 1570 | break; |
| 1571 | |
| 1572 | case IPSEC_ID_FQDN2: |
| 1573 | /* |
| 1574 | * FQDN may be used for in NAT-T with transport mode. |
| 1575 | * We can handle the message in this case. In the |
| 1576 | * other cases we'll drop the message later. |
| 1577 | */ |
| 1578 | break; |
| 1579 | |
| 1580 | default: |
| 1581 | message_drop(msg, ISAKMP_NOTIFY_INVALID_ID_INFORMATION18, |
| 1582 | 0, 1, 0); |
| 1583 | goto cleanup; |
| 1584 | } |
| 1585 | } |
| 1586 | |
| 1587 | /* Handle optional client ID payloads. */ |
| 1588 | idp = payload_first(msg, ISAKMP_PAYLOAD_ID5); |
| 1589 | if (idp) { |
| 1590 | /* If IDci is there, IDcr must be too. */ |
| 1591 | if (!TAILQ_NEXT(idp, link)((idp)->link.tqe_next)) { |
| 1592 | /* XXX Is this a good notify type? */ |
| 1593 | message_drop(msg, ISAKMP_NOTIFY_PAYLOAD_MALFORMED16, 0, |
| 1594 | 1, 0); |
| 1595 | goto cleanup; |
| 1596 | } |
| 1597 | ie->id_ci_sz = GET_ISAKMP_GEN_LENGTH(idp->p)field_get_num (isakmp_gen_fld + 2, idp->p); |
| 1598 | ie->id_ci = malloc(ie->id_ci_sz); |
| 1599 | if (!ie->id_ci) { |
| 1600 | log_error("responder_recv_HASH_SA_NONCE: " |
| 1601 | "malloc (%lu) failed", |
| 1602 | (unsigned long)ie->id_ci_sz); |
| 1603 | goto cleanup; |
| 1604 | } |
| 1605 | memcpy(ie->id_ci, idp->p, ie->id_ci_sz); |
| 1606 | idp->flags |= PL_MARK1; |
| 1607 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: IDci" , ie->id_ci + 4, ie->id_ci_sz - 4) |
| 1608 | "responder_recv_HASH_SA_NONCE: IDci",log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: IDci" , ie->id_ci + 4, ie->id_ci_sz - 4) |
| 1609 | ie->id_ci + ISAKMP_GEN_SZ, ie->id_ci_sz - ISAKMP_GEN_SZ))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: IDci" , ie->id_ci + 4, ie->id_ci_sz - 4); |
| 1610 | |
| 1611 | idp = TAILQ_NEXT(idp, link)((idp)->link.tqe_next); |
| 1612 | ie->id_cr_sz = GET_ISAKMP_GEN_LENGTH(idp->p)field_get_num (isakmp_gen_fld + 2, idp->p); |
| 1613 | ie->id_cr = malloc(ie->id_cr_sz); |
| 1614 | if (!ie->id_cr) { |
| 1615 | log_error("responder_recv_HASH_SA_NONCE: " |
| 1616 | "malloc (%lu) failed", |
| 1617 | (unsigned long)ie->id_cr_sz); |
| 1618 | goto cleanup; |
| 1619 | } |
| 1620 | memcpy(ie->id_cr, idp->p, ie->id_cr_sz); |
| 1621 | idp->flags |= PL_MARK1; |
| 1622 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: IDcr" , ie->id_cr + 4, ie->id_cr_sz - 4) |
| 1623 | "responder_recv_HASH_SA_NONCE: IDcr",log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: IDcr" , ie->id_cr + 4, ie->id_cr_sz - 4) |
| 1624 | ie->id_cr + ISAKMP_GEN_SZ, ie->id_cr_sz - ISAKMP_GEN_SZ))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: IDcr" , ie->id_cr + 4, ie->id_cr_sz - 4); |
| 1625 | } else { |
| 1626 | /* |
| 1627 | * If client identifiers are not present in the exchange, |
| 1628 | * we fake them. RFC 2409 states: |
| 1629 | * The identities of the SAs negotiated in Quick Mode are |
| 1630 | * implicitly assumed to be the IP addresses of the ISAKMP |
| 1631 | * peers, without any constraints on the protocol or port |
| 1632 | * numbers allowed, unless client identifiers are specified |
| 1633 | * in Quick Mode. |
| 1634 | * |
| 1635 | * -- Michael Paddon (mwp@aba.net.au) |
| 1636 | */ |
| 1637 | |
| 1638 | ie->flags = IPSEC_EXCH_FLAG_NO_ID1; |
| 1639 | |
| 1640 | /* Get initiator and responder addresses. */ |
| 1641 | msg->transport->vtbl->get_src(msg->transport, &src); |
| 1642 | msg->transport->vtbl->get_dst(msg->transport, &dst); |
| 1643 | ie->id_ci_sz = ISAKMP_ID_DATA_OFF8 + sockaddr_addrlen(src); |
| 1644 | ie->id_cr_sz = ISAKMP_ID_DATA_OFF8 + sockaddr_addrlen(dst); |
| 1645 | ie->id_ci = calloc(ie->id_ci_sz, sizeof(char)); |
| 1646 | ie->id_cr = calloc(ie->id_cr_sz, sizeof(char)); |
| 1647 | |
| 1648 | if (!ie->id_ci || !ie->id_cr) { |
| 1649 | log_error("responder_recv_HASH_SA_NONCE: " |
| 1650 | "calloc (%lu, %lu) failed", |
| 1651 | (unsigned long)ie->id_ci_sz, |
| 1652 | (unsigned long)sizeof(char)); |
| 1653 | goto cleanup; |
| 1654 | } |
| 1655 | if (src->sa_family != dst->sa_family) { |
| 1656 | log_error("initiator_recv_HASH_SA_NONCE: " |
| 1657 | "sa_family mismatch"); |
| 1658 | goto cleanup; |
| 1659 | } |
| 1660 | switch (src->sa_family) { |
| 1661 | case AF_INET2: |
| 1662 | SET_ISAKMP_ID_TYPE(ie->id_ci, IPSEC_ID_IPV4_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_ci, 1); |
| 1663 | SET_ISAKMP_ID_TYPE(ie->id_cr, IPSEC_ID_IPV4_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_cr, 1); |
| 1664 | break; |
| 1665 | |
| 1666 | case AF_INET624: |
| 1667 | SET_ISAKMP_ID_TYPE(ie->id_ci, IPSEC_ID_IPV6_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_ci, 5); |
| 1668 | SET_ISAKMP_ID_TYPE(ie->id_cr, IPSEC_ID_IPV6_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_cr, 5); |
| 1669 | break; |
| 1670 | |
| 1671 | default: |
| 1672 | log_error("initiator_recv_HASH_SA_NONCE: " |
| 1673 | "unknown sa_family %d", src->sa_family); |
| 1674 | goto cleanup; |
| 1675 | } |
| 1676 | |
| 1677 | memcpy(ie->id_cr + ISAKMP_ID_DATA_OFF8, sockaddr_addrdata(src), |
| 1678 | sockaddr_addrlen(src)); |
| 1679 | memcpy(ie->id_ci + ISAKMP_ID_DATA_OFF8, sockaddr_addrdata(dst), |
| 1680 | sockaddr_addrlen(dst)); |
| 1681 | } |
| 1682 | |
| 1683 | if (message_negotiate_sa(msg, check_policy)) |
| 1684 | goto cleanup; |
| 1685 | |
| 1686 | for (sa = TAILQ_FIRST(&exchange->sa_list)((&exchange->sa_list)->tqh_first); sa; |
| 1687 | sa = TAILQ_NEXT(sa, next)((sa)->next.tqe_next)) { |
| 1688 | for (proto = TAILQ_FIRST(&sa->protos)((&sa->protos)->tqh_first); proto; |
| 1689 | proto = TAILQ_NEXT(proto, link)((proto)->link.tqe_next)) { |
| 1690 | /* |
| 1691 | * XXX we need to have some attributes per proto, not |
| 1692 | * all per SA. |
| 1693 | */ |
| 1694 | ipsec_decode_transform(msg, sa, proto, |
| 1695 | proto->chosen->p); |
| 1696 | if (proto->proto == IPSEC_PROTO_IPSEC_AH2 && |
| 1697 | !((struct ipsec_proto *)proto->data)->auth) { |
| 1698 | log_print("responder_recv_HASH_SA_NONCE: " |
| 1699 | "AH proposed without an algorithm " |
| 1700 | "attribute"); |
| 1701 | message_drop(msg, |
| 1702 | ISAKMP_NOTIFY_NO_PROPOSAL_CHOSEN14, 0, 1, 0); |
| 1703 | goto next_sa; |
| 1704 | } |
| 1705 | } |
| 1706 | |
| 1707 | isa = sa->data; |
| 1708 | |
| 1709 | /* |
| 1710 | * The group description is mandatory if we got a KEY_EXCH |
| 1711 | * payload. |
| 1712 | */ |
| 1713 | if (kep) { |
| 1714 | if (!isa->group_desc) { |
| 1715 | log_print("responder_recv_HASH_SA_NONCE: " |
| 1716 | "KEY_EXCH payload without a group " |
| 1717 | "desc. attribute"); |
| 1718 | message_drop(msg, |
| 1719 | ISAKMP_NOTIFY_NO_PROPOSAL_CHOSEN14, 0, 1, 0); |
| 1720 | continue; |
| 1721 | } |
| 1722 | /* Also, all SAs must have equal groups. */ |
| 1723 | if (!group_desc) |
| 1724 | group_desc = isa->group_desc; |
| 1725 | else if (group_desc != isa->group_desc) { |
| 1726 | log_print("responder_recv_HASH_SA_NONCE: " |
| 1727 | "differing group descriptions in one QM"); |
| 1728 | message_drop(msg, |
| 1729 | ISAKMP_NOTIFY_NO_PROPOSAL_CHOSEN14, 0, 1, 0); |
| 1730 | continue; |
| 1731 | } |
| 1732 | } |
| 1733 | /* At least one SA was accepted. */ |
| 1734 | retval = 0; |
| 1735 | |
| 1736 | next_sa: |
| 1737 | ; /* XXX gcc3 wants this. */ |
| 1738 | } |
| 1739 | |
| 1740 | if (kep) { |
| 1741 | ie->group = group_get(group_desc); |
| 1742 | if (!ie->group) { |
| 1743 | /* |
| 1744 | * XXX If the error was due to an out-of-range group |
| 1745 | * description we should notify our peer, but this |
| 1746 | * should probably be done by the attribute |
| 1747 | * validation. Is it? |
| 1748 | */ |
| 1749 | goto cleanup; |
| 1750 | } |
| 1751 | } |
| 1752 | /* Copy out the initiator's nonce. */ |
| 1753 | if (exchange_save_nonce(msg)) |
| 1754 | goto cleanup; |
| 1755 | |
| 1756 | /* Handle the optional KEY_EXCH payload. */ |
| 1757 | if (kep && ipsec_save_g_x(msg)) |
| 1758 | goto cleanup; |
| 1759 | |
| 1760 | /* |
| 1761 | * Try to find and set the connection name on the exchange. |
| 1762 | */ |
| 1763 | |
| 1764 | /* |
| 1765 | * Check for accepted identities as well as lookup the connection |
| 1766 | * name and set it on the exchange. |
| 1767 | * |
| 1768 | * When not using policies make sure the peer proposes sane IDs. |
| 1769 | * Otherwise this is done by KeyNote. |
| 1770 | */ |
| 1771 | name = connection_passive_lookup_by_ids(ie->id_ci, ie->id_cr); |
| 1772 | if (name) { |
| 1773 | exchange->name = strdup(name); |
| 1774 | if (!exchange->name) { |
| 1775 | log_error("responder_recv_HASH_SA_NONCE: " |
| 1776 | "strdup (\"%s\") failed", name); |
| 1777 | goto cleanup; |
| 1778 | } |
| 1779 | } else if ( |
| 1780 | ignore_policy || |
| 1781 | strncmp("yes", conf_get_str("General", "Use-Keynote"), 3)) { |
| 1782 | log_print("responder_recv_HASH_SA_NONCE: peer proposed " |
| 1783 | "invalid phase 2 IDs: %s", |
| 1784 | (exchange->doi->decode_ids("initiator id %s, responder" |
| 1785 | " id %s", ie->id_ci, ie->id_ci_sz, ie->id_cr, |
| 1786 | ie->id_cr_sz, 1))); |
| 1787 | message_drop(msg, ISAKMP_NOTIFY_INVALID_ID_INFORMATION18, 0, 1, |
| 1788 | 0); |
| 1789 | goto cleanup; |
| 1790 | } |
| 1791 | |
| 1792 | return retval; |
| 1793 | |
| 1794 | cleanup: |
| 1795 | /* Remove all potential protocols that have been added to the SAs. */ |
| 1796 | for (sa = TAILQ_FIRST(&exchange->sa_list)((&exchange->sa_list)->tqh_first); sa; |
| 1797 | sa = TAILQ_NEXT(sa, next)((sa)->next.tqe_next)) |
| 1798 | while ((proto = TAILQ_FIRST(&sa->protos)((&sa->protos)->tqh_first)) != 0) |
| 1799 | proto_free(proto); |
| 1800 | free(my_hash); |
| 1801 | free(ie->id_ci); |
| 1802 | ie->id_ci = 0; |
| 1803 | free(ie->id_cr); |
| 1804 | ie->id_cr = 0; |
| 1805 | return -1; |
| 1806 | } |
| 1807 | |
| 1808 | /* Reply with the transform we chose. */ |
| 1809 | static int |
| 1810 | responder_send_HASH_SA_NONCE(struct message *msg) |
| 1811 | { |
| 1812 | struct exchange *exchange = msg->exchange; |
| 1813 | struct ipsec_exch *ie = exchange->data; |
| 1814 | struct sa *isakmp_sa = msg->isakmp_sa; |
| 1815 | struct ipsec_sa *isa = isakmp_sa->data; |
| 1816 | struct prf *prf; |
| 1817 | struct hash *hash = hash_get(isa->hash); |
| 1818 | size_t nonce_sz = exchange->nonce_i_len; |
| 1819 | u_int8_t *buf; |
| 1820 | int initiator = exchange->initiator; |
| 1821 | char header[80]; |
| 1822 | u_int32_t i; |
| 1823 | u_int8_t *id; |
| 1824 | size_t sz; |
| 1825 | |
| 1826 | /* |
| 1827 | * We want a HASH payload to start with. XXX Share with |
| 1828 | * ike_main_mode.c? |
| 1829 | */ |
| 1830 | buf = malloc(ISAKMP_HASH_SZ4 + hash->hashsize); |
| 1831 | if (!buf) { |
| 1832 | log_error("responder_send_HASH_SA_NONCE: malloc (%lu) failed", |
| 1833 | ISAKMP_HASH_SZ4 + (unsigned long)hash->hashsize); |
| 1834 | return -1; |
| 1835 | } |
| 1836 | if (message_add_payload(msg, ISAKMP_PAYLOAD_HASH8, buf, |
| 1837 | ISAKMP_HASH_SZ4 + hash->hashsize, 1)) { |
| 1838 | free(buf); |
| 1839 | return -1; |
| 1840 | } |
| 1841 | /* Add the SA payload(s) with the transform(s) that was/were chosen. */ |
| 1842 | if (message_add_sa_payload(msg)) |
| 1843 | return -1; |
| 1844 | |
| 1845 | /* Generate a nonce, and add it to the message. */ |
| 1846 | if (exchange_gen_nonce(msg, nonce_sz)) |
| 1847 | return -1; |
| 1848 | |
| 1849 | /* Generate optional KEY_EXCH payload. This is known as PFS. */ |
| 1850 | if (ie->group && ipsec_gen_g_x(msg)) |
| 1851 | return -1; |
| 1852 | |
| 1853 | /* |
| 1854 | * If the initiator client ID's were acceptable, just mirror them |
| 1855 | * back. |
| 1856 | */ |
| 1857 | if (!(ie->flags & IPSEC_EXCH_FLAG_NO_ID1)) { |
| 1858 | sz = ie->id_ci_sz; |
| 1859 | id = malloc(sz); |
| 1860 | if (!id) { |
| 1861 | log_error("responder_send_HASH_SA_NONCE: " |
| 1862 | "malloc (%lu) failed", (unsigned long)sz); |
| 1863 | return -1; |
| 1864 | } |
| 1865 | memcpy(id, ie->id_ci, sz); |
| 1866 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: IDic" , id, sz) |
| 1867 | "responder_send_HASH_SA_NONCE: IDic", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: IDic" , id, sz); |
| 1868 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { |
| 1869 | free(id); |
| 1870 | return -1; |
| 1871 | } |
| 1872 | sz = ie->id_cr_sz; |
| 1873 | id = malloc(sz); |
| 1874 | if (!id) { |
| 1875 | log_error("responder_send_HASH_SA_NONCE: " |
| 1876 | "malloc (%lu) failed", (unsigned long)sz); |
| 1877 | return -1; |
| 1878 | } |
| 1879 | memcpy(id, ie->id_cr, sz); |
| 1880 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: IDrc" , id, sz) |
| 1881 | "responder_send_HASH_SA_NONCE: IDrc", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: IDrc" , id, sz); |
| 1882 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { |
| 1883 | free(id); |
| 1884 | return -1; |
| 1885 | } |
| 1886 | } |
| 1887 | /* Allocate the prf and start calculating our HASH(2). XXX Share? */ |
| 1888 | LOG_DBG((LOG_NEGOTIATION, 90, "responder_recv_HASH: "log_debug (LOG_NEGOTIATION, 90, "responder_recv_HASH: " "isakmp_sa %p isa %p" , isakmp_sa, isa) |
| 1889 | "isakmp_sa %p isa %p", isakmp_sa, isa))log_debug (LOG_NEGOTIATION, 90, "responder_recv_HASH: " "isakmp_sa %p isa %p" , isakmp_sa, isa); |
| 1890 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: "log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: " "SKEYID_a", isa->skeyid_a, isa->skeyid_len) |
| 1891 | "SKEYID_a", isa->skeyid_a, isa->skeyid_len))log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: " "SKEYID_a", isa->skeyid_a, isa->skeyid_len); |
| 1892 | prf = prf_alloc(isa->prf_type, hash->type, isa->skeyid_a, |
| 1893 | isa->skeyid_len); |
| 1894 | if (!prf) |
| 1895 | return -1; |
| 1896 | prf->Init(prf->prfctx); |
| 1897 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: message_id" , exchange->message_id, 4) |
| 1898 | "responder_send_HASH_SA_NONCE: message_id",log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: message_id" , exchange->message_id, 4) |
| 1899 | exchange->message_id, ISAKMP_HDR_MESSAGE_ID_LEN))log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: message_id" , exchange->message_id, 4); |
| 1900 | prf->Update(prf->prfctx, exchange->message_id, |
| 1901 | ISAKMP_HDR_MESSAGE_ID_LEN4); |
| 1902 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: "log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: " "NONCE_I_b", exchange->nonce_i, exchange->nonce_i_len) |
| 1903 | "NONCE_I_b", exchange->nonce_i, exchange->nonce_i_len))log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: " "NONCE_I_b", exchange->nonce_i, exchange->nonce_i_len); |
| 1904 | prf->Update(prf->prfctx, exchange->nonce_i, exchange->nonce_i_len); |
| 1905 | |
| 1906 | /* Loop over all payloads after HASH(2). */ |
| 1907 | for (i = 2; i < msg->iovlen; i++) { |
| 1908 | /* XXX Misleading payload type printouts. */ |
| 1909 | snprintf(header, sizeof header, |
| 1910 | "responder_send_HASH_SA_NONCE: payload %d after HASH(2)", |
| 1911 | i - 1); |
| 1912 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, header, msg->iov[i].iov_base,log_debug_buf (LOG_NEGOTIATION, 90, header, msg->iov[i].iov_base , msg->iov[i].iov_len) |
| 1913 | msg->iov[i].iov_len))log_debug_buf (LOG_NEGOTIATION, 90, header, msg->iov[i].iov_base , msg->iov[i].iov_len); |
| 1914 | prf->Update(prf->prfctx, msg->iov[i].iov_base, |
| 1915 | msg->iov[i].iov_len); |
| 1916 | } |
| 1917 | prf->Final(buf + ISAKMP_HASH_DATA_OFF4, prf->prfctx); |
| 1918 | prf_free(prf); |
| 1919 | snprintf(header, sizeof header, "responder_send_HASH_SA_NONCE: " |
| 1920 | "HASH_%c", initiator ? 'I' : 'R'); |
| 1921 | LOG_DBG_BUF((LOG_NEGOTIATION, 80, header, buf + ISAKMP_HASH_DATA_OFF,log_debug_buf (LOG_NEGOTIATION, 80, header, buf + 4, hash-> hashsize) |
| 1922 | hash->hashsize))log_debug_buf (LOG_NEGOTIATION, 80, header, buf + 4, hash-> hashsize); |
| 1923 | |
| 1924 | if (ie->group) |
| 1925 | message_register_post_send(msg, gen_g_xy); |
| 1926 | |
| 1927 | return 0; |
| 1928 | } |
| 1929 | |
| 1930 | static void |
| 1931 | gen_g_xy(struct message *msg) |
| 1932 | { |
| 1933 | struct exchange *exchange = msg->exchange; |
| 1934 | struct ipsec_exch *ie = exchange->data; |
| 1935 | |
| 1936 | /* Compute Diffie-Hellman shared value. */ |
| 1937 | ie->g_xy_len = dh_secretlen(ie->group); |
| 1938 | ie->g_xy = malloc(ie->g_xy_len); |
| 1939 | if (!ie->g_xy) { |
| 1940 | log_error("gen_g_xy: malloc (%lu) failed", |
| 1941 | (unsigned long)ie->g_xy_len); |
| 1942 | return; |
| 1943 | } |
| 1944 | if (dh_create_shared(ie->group, ie->g_xy, |
| 1945 | exchange->initiator ? ie->g_xr : ie->g_xi)) { |
| 1946 | log_print("gen_g_xy: dh_create_shared failed"); |
| 1947 | return; |
| 1948 | } |
| 1949 | LOG_DBG_BUF((LOG_NEGOTIATION, 80, "gen_g_xy: g^xy", ie->g_xy,log_debug_buf (LOG_NEGOTIATION, 80, "gen_g_xy: g^xy", ie-> g_xy, ie->g_xy_len) |
| 1950 | ie->g_xy_len))log_debug_buf (LOG_NEGOTIATION, 80, "gen_g_xy: g^xy", ie-> g_xy, ie->g_xy_len); |
| 1951 | } |
| 1952 | |
| 1953 | static int |
| 1954 | responder_recv_HASH(struct message *msg) |
| 1955 | { |
| 1956 | struct exchange *exchange = msg->exchange; |
| 1957 | struct sa *isakmp_sa = msg->isakmp_sa; |
| 1958 | struct ipsec_sa *isa = isakmp_sa->data; |
| 1959 | struct prf *prf; |
| 1960 | u_int8_t *hash, *my_hash = 0; |
| 1961 | size_t hash_len; |
| 1962 | struct payload *hashp; |
| 1963 | |
| 1964 | /* Find HASH(3) and create our own hash, just as big. */ |
| 1965 | hashp = payload_first(msg, ISAKMP_PAYLOAD_HASH8); |
| 1966 | hash = hashp->p; |
| 1967 | hashp->flags |= PL_MARK1; |
| 1968 | hash_len = GET_ISAKMP_GEN_LENGTH(hash)field_get_num (isakmp_gen_fld + 2, hash); |
| 1969 | my_hash = malloc(hash_len - ISAKMP_GEN_SZ4); |
| 1970 | if (!my_hash) { |
| 1971 | log_error("responder_recv_HASH: malloc (%lu) failed", |
| 1972 | (unsigned long)hash_len - ISAKMP_GEN_SZ4); |
| 1973 | goto cleanup; |
| 1974 | } |
| 1975 | /* Allocate the prf and start calculating our HASH(3). XXX Share? */ |
| 1976 | LOG_DBG((LOG_NEGOTIATION, 90, "responder_recv_HASH: "log_debug (LOG_NEGOTIATION, 90, "responder_recv_HASH: " "isakmp_sa %p isa %p" , isakmp_sa, isa) |
| 1977 | "isakmp_sa %p isa %p", isakmp_sa, isa))log_debug (LOG_NEGOTIATION, 90, "responder_recv_HASH: " "isakmp_sa %p isa %p" , isakmp_sa, isa); |
| 1978 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "responder_recv_HASH: SKEYID_a",log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: SKEYID_a" , isa->skeyid_a, isa->skeyid_len) |
| 1979 | isa->skeyid_a, isa->skeyid_len))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: SKEYID_a" , isa->skeyid_a, isa->skeyid_len); |
| 1980 | prf = prf_alloc(isa->prf_type, isa->hash, isa->skeyid_a, |
| 1981 | isa->skeyid_len); |
| 1982 | if (!prf) |
| 1983 | goto cleanup; |
| 1984 | prf->Init(prf->prfctx); |
| 1985 | prf->Update(prf->prfctx, (unsigned char *)"\0", 1); |
| 1986 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "responder_recv_HASH: message_id",log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: message_id" , exchange->message_id, 4) |
| 1987 | exchange->message_id, ISAKMP_HDR_MESSAGE_ID_LEN))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: message_id" , exchange->message_id, 4); |
| 1988 | prf->Update(prf->prfctx, exchange->message_id, |
| 1989 | ISAKMP_HDR_MESSAGE_ID_LEN4); |
| 1990 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "responder_recv_HASH: NONCE_I_b",log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: NONCE_I_b" , exchange->nonce_i, exchange->nonce_i_len) |
| 1991 | exchange->nonce_i, exchange->nonce_i_len))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: NONCE_I_b" , exchange->nonce_i, exchange->nonce_i_len); |
| 1992 | prf->Update(prf->prfctx, exchange->nonce_i, exchange->nonce_i_len); |
| 1993 | LOG_DBG_BUF((LOG_NEGOTIATION, 90, "responder_recv_HASH: NONCE_R_b",log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: NONCE_R_b" , exchange->nonce_r, exchange->nonce_r_len) |
| 1994 | exchange->nonce_r, exchange->nonce_r_len))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: NONCE_R_b" , exchange->nonce_r, exchange->nonce_r_len); |
| 1995 | prf->Update(prf->prfctx, exchange->nonce_r, exchange->nonce_r_len); |
| 1996 | prf->Final(my_hash, prf->prfctx); |
| 1997 | prf_free(prf); |
| 1998 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: computed HASH(3)" , my_hash, hash_len - 4) |
| 1999 | "responder_recv_HASH: computed HASH(3)", my_hash,log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: computed HASH(3)" , my_hash, hash_len - 4) |
| 2000 | hash_len - ISAKMP_GEN_SZ))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: computed HASH(3)" , my_hash, hash_len - 4); |
| 2001 | if (memcmp(hash + ISAKMP_GEN_SZ4, my_hash, hash_len - ISAKMP_GEN_SZ4) |
| 2002 | != 0) { |
| 2003 | message_drop(msg, ISAKMP_NOTIFY_INVALID_HASH_INFORMATION23, 0, |
| 2004 | 1, 0); |
| 2005 | goto cleanup; |
| 2006 | } |
| 2007 | free(my_hash); |
| 2008 | |
| 2009 | /* Mark message as authenticated. */ |
| 2010 | msg->flags |= MSG_AUTHENTICATED0x10; |
| 2011 | |
| 2012 | post_quick_mode(msg); |
| 2013 | |
| 2014 | return 0; |
| 2015 | |
| 2016 | cleanup: |
| 2017 | free(my_hash); |
| 2018 | return -1; |
| 2019 | } |