| File: | src/sbin/isakmpd/ike_quick_mode.c |
| Warning: | line 356, column 7 Array access (from variable 'keynote_ids') results in a null pointer dereference |
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| 1 | /* $OpenBSD: ike_quick_mode.c,v 1.115 2023/03/31 20:16:55 tb 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 | if (!ie->group) | |||
| 897 | return -1; | |||
| 898 | ie->g_x_len = dh_getlen(ie->group); | |||
| 899 | ||||
| 900 | if (ipsec_gen_g_x(msg)) { | |||
| 901 | group_free(ie->group); | |||
| 902 | ie->group = 0; | |||
| 903 | return -1; | |||
| 904 | } | |||
| 905 | } | |||
| 906 | /* Generate optional client ID payloads. XXX Share with responder. */ | |||
| 907 | local_id = conf_get_str(exchange->name, "Local-ID"); | |||
| 908 | remote_id = conf_get_str(exchange->name, "Remote-ID"); | |||
| 909 | if (local_id && remote_id) { | |||
| 910 | id = ipsec_build_id(local_id, &sz); | |||
| 911 | if (!id) | |||
| 912 | return -1; | |||
| 913 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDic" , id, sz) | |||
| 914 | "initiator_send_HASH_SA_NONCE: IDic", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDic" , id, sz); | |||
| 915 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { | |||
| 916 | free(id); | |||
| 917 | return -1; | |||
| 918 | } | |||
| 919 | id = ipsec_build_id(remote_id, &sz); | |||
| 920 | if (!id) | |||
| 921 | return -1; | |||
| 922 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDrc" , id, sz) | |||
| 923 | "initiator_send_HASH_SA_NONCE: IDrc", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDrc" , id, sz); | |||
| 924 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { | |||
| 925 | free(id); | |||
| 926 | return -1; | |||
| 927 | } | |||
| 928 | } | |||
| 929 | /* XXX I do not judge these as errors, are they? */ | |||
| 930 | else if (local_id) | |||
| 931 | log_print("initiator_send_HASH_SA_NONCE: " | |||
| 932 | "Local-ID given without Remote-ID for \"%s\"", | |||
| 933 | exchange->name); | |||
| 934 | else if (remote_id) | |||
| 935 | /* | |||
| 936 | * This code supports the "road warrior" case, where the | |||
| 937 | * initiator doesn't have a fixed IP address, but wants to | |||
| 938 | * specify a particular remote network to talk to. -- Adrian | |||
| 939 | * Close <adrian@esec.com.au> | |||
| 940 | */ | |||
| 941 | { | |||
| 942 | log_print("initiator_send_HASH_SA_NONCE: " | |||
| 943 | "Remote-ID given without Local-ID for \"%s\"", | |||
| 944 | exchange->name); | |||
| 945 | ||||
| 946 | /* | |||
| 947 | * If we're here, then we are the initiator, so use initiator | |||
| 948 | * address for local ID | |||
| 949 | */ | |||
| 950 | msg->transport->vtbl->get_src(msg->transport, &src); | |||
| 951 | sz = ISAKMP_ID_SZ8 + sockaddr_addrlen(src); | |||
| 952 | ||||
| 953 | id = calloc(sz, sizeof(char)); | |||
| 954 | if (!id) { | |||
| 955 | log_error("initiator_send_HASH_SA_NONCE: " | |||
| 956 | "calloc (%lu, %lu) failed", (unsigned long)sz, | |||
| 957 | (unsigned long)sizeof(char)); | |||
| 958 | return -1; | |||
| 959 | } | |||
| 960 | switch (src->sa_family) { | |||
| 961 | case AF_INET624: | |||
| 962 | SET_ISAKMP_ID_TYPE(id, IPSEC_ID_IPV6_ADDR)field_set_num (isakmp_id_fld + 0, id, 5); | |||
| 963 | break; | |||
| 964 | case AF_INET2: | |||
| 965 | SET_ISAKMP_ID_TYPE(id, IPSEC_ID_IPV4_ADDR)field_set_num (isakmp_id_fld + 0, id, 1); | |||
| 966 | break; | |||
| 967 | default: | |||
| 968 | log_error("initiator_send_HASH_SA_NONCE: " | |||
| 969 | "unknown sa_family %d", src->sa_family); | |||
| 970 | free(id); | |||
| 971 | return -1; | |||
| 972 | } | |||
| 973 | memcpy(id + ISAKMP_ID_DATA_OFF8, sockaddr_addrdata(src), | |||
| 974 | sockaddr_addrlen(src)); | |||
| 975 | ||||
| 976 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDic" , id, sz) | |||
| 977 | "initiator_send_HASH_SA_NONCE: IDic", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDic" , id, sz); | |||
| 978 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { | |||
| 979 | free(id); | |||
| 980 | return -1; | |||
| 981 | } | |||
| 982 | /* Send supplied remote_id */ | |||
| 983 | id = ipsec_build_id(remote_id, &sz); | |||
| 984 | if (!id) | |||
| 985 | return -1; | |||
| 986 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDrc" , id, sz) | |||
| 987 | "initiator_send_HASH_SA_NONCE: IDrc", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH_SA_NONCE: IDrc" , id, sz); | |||
| 988 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { | |||
| 989 | free(id); | |||
| 990 | return -1; | |||
| 991 | } | |||
| 992 | } | |||
| 993 | if (ipsec_fill_in_hash(msg)) | |||
| 994 | goto bail_out; | |||
| 995 | ||||
| 996 | conf_free_list(suite_conf); | |||
| 997 | for (i = 0; i < prop_no; i++) { | |||
| 998 | free(transform[i]); | |||
| 999 | free(transform_len[i]); | |||
| 1000 | } | |||
| 1001 | free(proposal); | |||
| 1002 | free(transform); | |||
| 1003 | free(transforms_len); | |||
| 1004 | free(transform_len); | |||
| 1005 | free(transform_cnt); | |||
| 1006 | return 0; | |||
| 1007 | ||||
| 1008 | bail_out: | |||
| 1009 | free(sa_buf); | |||
| 1010 | if (proposal) { | |||
| 1011 | for (i = 0; i < prop_no; i++) { | |||
| 1012 | free(proposal[i]); | |||
| 1013 | if (transform[i]) { | |||
| 1014 | for (xf_no = 0; xf_no < transform_cnt[i]; | |||
| 1015 | xf_no++) | |||
| 1016 | free(transform[i][xf_no]); | |||
| 1017 | free(transform[i]); | |||
| 1018 | } | |||
| 1019 | free(transform_len[i]); | |||
| 1020 | } | |||
| 1021 | free(proposal); | |||
| 1022 | free(transforms_len); | |||
| 1023 | free(transform); | |||
| 1024 | free(transform_len); | |||
| 1025 | free(transform_cnt); | |||
| 1026 | } | |||
| 1027 | if (xf_conf) | |||
| 1028 | conf_free_list(xf_conf); | |||
| 1029 | if (prot_conf) | |||
| 1030 | conf_free_list(prot_conf); | |||
| 1031 | conf_free_list(suite_conf); | |||
| 1032 | return -1; | |||
| 1033 | } | |||
| 1034 | ||||
| 1035 | /* Figure out what transform the responder chose. */ | |||
| 1036 | static int | |||
| 1037 | initiator_recv_HASH_SA_NONCE(struct message *msg) | |||
| 1038 | { | |||
| 1039 | struct exchange *exchange = msg->exchange; | |||
| 1040 | struct ipsec_exch *ie = exchange->data; | |||
| 1041 | struct sa *sa; | |||
| 1042 | struct proto *proto, *next_proto; | |||
| 1043 | struct payload *sa_p = payload_first(msg, ISAKMP_PAYLOAD_SA1); | |||
| 1044 | struct payload *xf, *idp; | |||
| 1045 | struct payload *hashp = payload_first(msg, ISAKMP_PAYLOAD_HASH8); | |||
| 1046 | struct payload *kep = payload_first(msg, ISAKMP_PAYLOAD_KEY_EXCH4); | |||
| 1047 | struct prf *prf; | |||
| 1048 | struct sa *isakmp_sa = msg->isakmp_sa; | |||
| 1049 | struct ipsec_sa *isa = isakmp_sa->data; | |||
| 1050 | struct hash *hash = hash_get(isa->hash); | |||
| 1051 | u_int8_t *rest; | |||
| 1052 | size_t rest_len; | |||
| 1053 | struct sockaddr *src, *dst; | |||
| 1054 | ||||
| 1055 | /* Allocate the prf and start calculating our HASH(1). XXX Share? */ | |||
| 1056 | 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 ) | |||
| 1057 | "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 ); | |||
| 1058 | prf = prf_alloc(isa->prf_type, hash->type, isa->skeyid_a, | |||
| 1059 | isa->skeyid_len); | |||
| 1060 | if (!prf) | |||
| ||||
| 1061 | return -1; | |||
| 1062 | ||||
| 1063 | prf->Init(prf->prfctx); | |||
| 1064 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: message_id" , exchange->message_id, 4) | |||
| 1065 | "initiator_recv_HASH_SA_NONCE: message_id",log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: message_id" , exchange->message_id, 4) | |||
| 1066 | 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); | |||
| 1067 | prf->Update(prf->prfctx, exchange->message_id, | |||
| 1068 | ISAKMP_HDR_MESSAGE_ID_LEN4); | |||
| 1069 | 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) | |||
| 1070 | "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); | |||
| 1071 | prf->Update(prf->prfctx, exchange->nonce_i, exchange->nonce_i_len); | |||
| 1072 | rest = hashp->p + GET_ISAKMP_GEN_LENGTH(hashp->p)field_get_num (isakmp_gen_fld + 2, hashp->p); | |||
| 1073 | rest_len = (GET_ISAKMP_HDR_LENGTH(msg->iov[0].iov_base)field_get_num (isakmp_hdr_fld + 7, msg->iov[0].iov_base) | |||
| 1074 | - (rest - (u_int8_t *)msg->iov[0].iov_base)); | |||
| 1075 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: payloads after HASH(2)" , rest, rest_len) | |||
| 1076 | "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) | |||
| 1077 | rest_len))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_recv_HASH_SA_NONCE: payloads after HASH(2)" , rest, rest_len); | |||
| 1078 | prf->Update(prf->prfctx, rest, rest_len); | |||
| 1079 | prf->Final(hash->digest, prf->prfctx); | |||
| 1080 | prf_free(prf); | |||
| 1081 | LOG_DBG_BUF((LOG_NEGOTIATION, 80,log_debug_buf (LOG_NEGOTIATION, 80, "initiator_recv_HASH_SA_NONCE: computed HASH(2)" , hash->digest, hash->hashsize) | |||
| 1082 | "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) | |||
| 1083 | hash->hashsize))log_debug_buf (LOG_NEGOTIATION, 80, "initiator_recv_HASH_SA_NONCE: computed HASH(2)" , hash->digest, hash->hashsize); | |||
| 1084 | if (memcmp(hashp->p + ISAKMP_HASH_DATA_OFF4, hash->digest, | |||
| 1085 | hash->hashsize) != 0) { | |||
| 1086 | message_drop(msg, ISAKMP_NOTIFY_INVALID_HASH_INFORMATION23, 0, 1, | |||
| 1087 | 0); | |||
| 1088 | return -1; | |||
| 1089 | } | |||
| 1090 | /* Mark the HASH as handled. */ | |||
| 1091 | hashp->flags |= PL_MARK1; | |||
| 1092 | ||||
| 1093 | /* Mark message as authenticated. */ | |||
| 1094 | msg->flags |= MSG_AUTHENTICATED0x10; | |||
| 1095 | ||||
| 1096 | /* | |||
| 1097 | * As we are getting an answer on our transform offer, only one | |||
| 1098 | * transform should be given. | |||
| 1099 | * | |||
| 1100 | * XXX Currently we only support negotiating one SA per quick mode run. | |||
| 1101 | */ | |||
| 1102 | if (TAILQ_NEXT(sa_p, link)((sa_p)->link.tqe_next)) { | |||
| 1103 | log_print("initiator_recv_HASH_SA_NONCE: " | |||
| 1104 | "multiple SA payloads in quick mode not supported yet"); | |||
| 1105 | return -1; | |||
| 1106 | } | |||
| 1107 | sa = TAILQ_FIRST(&exchange->sa_list)((&exchange->sa_list)->tqh_first); | |||
| 1108 | ||||
| 1109 | /* This is here for the policy check */ | |||
| 1110 | if (kep) | |||
| 1111 | ie->pfs = 1; | |||
| 1112 | ||||
| 1113 | /* Drop message when it contains ID types we do not implement yet. */ | |||
| 1114 | TAILQ_FOREACH(idp, &msg->payload[ISAKMP_PAYLOAD_ID], link)for((idp) = ((&msg->payload[5])->tqh_first); (idp) != ((void *)0); (idp) = ((idp)->link.tqe_next)) { | |||
| 1115 | switch (GET_ISAKMP_ID_TYPE(idp->p)field_get_num (isakmp_id_fld + 0, idp->p)) { | |||
| 1116 | case IPSEC_ID_IPV4_ADDR1: | |||
| 1117 | case IPSEC_ID_IPV4_ADDR_SUBNET4: | |||
| 1118 | case IPSEC_ID_IPV6_ADDR5: | |||
| 1119 | case IPSEC_ID_IPV6_ADDR_SUBNET6: | |||
| 1120 | break; | |||
| 1121 | ||||
| 1122 | case IPSEC_ID_FQDN2: | |||
| 1123 | /* | |||
| 1124 | * FQDN may be used for in NAT-T with transport mode. | |||
| 1125 | * We can handle the message in this case. In the | |||
| 1126 | * other cases we'll drop the message later. | |||
| 1127 | */ | |||
| 1128 | break; | |||
| 1129 | ||||
| 1130 | default: | |||
| 1131 | message_drop(msg, ISAKMP_NOTIFY_INVALID_ID_INFORMATION18, | |||
| 1132 | 0, 1, 0); | |||
| 1133 | return -1; | |||
| 1134 | } | |||
| 1135 | } | |||
| 1136 | ||||
| 1137 | /* Handle optional client ID payloads. */ | |||
| 1138 | idp = payload_first(msg, ISAKMP_PAYLOAD_ID5); | |||
| 1139 | if (idp) { | |||
| 1140 | /* If IDci is there, IDcr must be too. */ | |||
| 1141 | if (!TAILQ_NEXT(idp, link)((idp)->link.tqe_next)) { | |||
| 1142 | /* XXX Is this a good notify type? */ | |||
| 1143 | message_drop(msg, ISAKMP_NOTIFY_PAYLOAD_MALFORMED16, 0, | |||
| 1144 | 1, 0); | |||
| 1145 | return -1; | |||
| 1146 | } | |||
| 1147 | /* XXX We should really compare, not override. */ | |||
| 1148 | ie->id_ci_sz = GET_ISAKMP_GEN_LENGTH(idp->p)field_get_num (isakmp_gen_fld + 2, idp->p); | |||
| 1149 | ie->id_ci = malloc(ie->id_ci_sz); | |||
| 1150 | if (!ie->id_ci) { | |||
| 1151 | log_error("initiator_recv_HASH_SA_NONCE: " | |||
| 1152 | "malloc (%lu) failed", | |||
| 1153 | (unsigned long)ie->id_ci_sz); | |||
| 1154 | return -1; | |||
| 1155 | } | |||
| 1156 | memcpy(ie->id_ci, idp->p, ie->id_ci_sz); | |||
| 1157 | idp->flags |= PL_MARK1; | |||
| 1158 | 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) | |||
| 1159 | "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) | |||
| 1160 | 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); | |||
| 1161 | ||||
| 1162 | idp = TAILQ_NEXT(idp, link)((idp)->link.tqe_next); | |||
| 1163 | ie->id_cr_sz = GET_ISAKMP_GEN_LENGTH(idp->p)field_get_num (isakmp_gen_fld + 2, idp->p); | |||
| 1164 | ie->id_cr = malloc(ie->id_cr_sz); | |||
| 1165 | if (!ie->id_cr) { | |||
| 1166 | log_error("initiator_recv_HASH_SA_NONCE: " | |||
| 1167 | "malloc (%lu) failed", | |||
| 1168 | (unsigned long)ie->id_cr_sz); | |||
| 1169 | return -1; | |||
| 1170 | } | |||
| 1171 | memcpy(ie->id_cr, idp->p, ie->id_cr_sz); | |||
| 1172 | idp->flags |= PL_MARK1; | |||
| 1173 | 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) | |||
| 1174 | "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) | |||
| 1175 | 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); | |||
| 1176 | } else { | |||
| 1177 | /* | |||
| 1178 | * If client identifiers are not present in the exchange, | |||
| 1179 | * we fake them. RFC 2409 states: | |||
| 1180 | * The identities of the SAs negotiated in Quick Mode are | |||
| 1181 | * implicitly assumed to be the IP addresses of the ISAKMP | |||
| 1182 | * peers, without any constraints on the protocol or port | |||
| 1183 | * numbers allowed, unless client identifiers are specified | |||
| 1184 | * in Quick Mode. | |||
| 1185 | * | |||
| 1186 | * -- Michael Paddon (mwp@aba.net.au) | |||
| 1187 | */ | |||
| 1188 | ||||
| 1189 | ie->flags = IPSEC_EXCH_FLAG_NO_ID1; | |||
| 1190 | ||||
| 1191 | /* Get initiator and responder addresses. */ | |||
| 1192 | msg->transport->vtbl->get_src(msg->transport, &src); | |||
| 1193 | msg->transport->vtbl->get_dst(msg->transport, &dst); | |||
| 1194 | ie->id_ci_sz = ISAKMP_ID_DATA_OFF8 + sockaddr_addrlen(src); | |||
| 1195 | ie->id_cr_sz = ISAKMP_ID_DATA_OFF8 + sockaddr_addrlen(dst); | |||
| 1196 | ie->id_ci = calloc(ie->id_ci_sz, sizeof(char)); | |||
| 1197 | ie->id_cr = calloc(ie->id_cr_sz, sizeof(char)); | |||
| 1198 | ||||
| 1199 | if (!ie->id_ci || !ie->id_cr) { | |||
| 1200 | log_error("initiator_recv_HASH_SA_NONCE: " | |||
| 1201 | "calloc (%lu, %lu) failed", | |||
| 1202 | (unsigned long)ie->id_cr_sz, | |||
| 1203 | (unsigned long)sizeof(char)); | |||
| 1204 | free(ie->id_ci); | |||
| 1205 | ie->id_ci = 0; | |||
| 1206 | free(ie->id_cr); | |||
| 1207 | ie->id_cr = 0; | |||
| 1208 | return -1; | |||
| 1209 | } | |||
| 1210 | if (src->sa_family != dst->sa_family) { | |||
| 1211 | log_error("initiator_recv_HASH_SA_NONCE: " | |||
| 1212 | "sa_family mismatch"); | |||
| 1213 | free(ie->id_ci); | |||
| 1214 | ie->id_ci = 0; | |||
| 1215 | free(ie->id_cr); | |||
| 1216 | ie->id_cr = 0; | |||
| 1217 | return -1; | |||
| 1218 | } | |||
| 1219 | switch (src->sa_family) { | |||
| 1220 | case AF_INET2: | |||
| 1221 | SET_ISAKMP_ID_TYPE(ie->id_ci, IPSEC_ID_IPV4_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_ci, 1); | |||
| 1222 | SET_ISAKMP_ID_TYPE(ie->id_cr, IPSEC_ID_IPV4_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_cr, 1); | |||
| 1223 | break; | |||
| 1224 | ||||
| 1225 | case AF_INET624: | |||
| 1226 | SET_ISAKMP_ID_TYPE(ie->id_ci, IPSEC_ID_IPV6_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_ci, 5); | |||
| 1227 | SET_ISAKMP_ID_TYPE(ie->id_cr, IPSEC_ID_IPV6_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_cr, 5); | |||
| 1228 | break; | |||
| 1229 | ||||
| 1230 | default: | |||
| 1231 | log_error("initiator_recv_HASH_SA_NONCE: " | |||
| 1232 | "unknown sa_family %d", src->sa_family); | |||
| 1233 | free(ie->id_ci); | |||
| 1234 | ie->id_ci = 0; | |||
| 1235 | free(ie->id_cr); | |||
| 1236 | ie->id_cr = 0; | |||
| 1237 | return -1; | |||
| 1238 | } | |||
| 1239 | memcpy(ie->id_ci + ISAKMP_ID_DATA_OFF8, sockaddr_addrdata(src), | |||
| 1240 | sockaddr_addrlen(src)); | |||
| 1241 | memcpy(ie->id_cr + ISAKMP_ID_DATA_OFF8, sockaddr_addrdata(dst), | |||
| 1242 | sockaddr_addrlen(dst)); | |||
| 1243 | } | |||
| 1244 | ||||
| 1245 | /* Build the protection suite in our SA. */ | |||
| 1246 | TAILQ_FOREACH(xf, &msg->payload[ISAKMP_PAYLOAD_TRANSFORM], link)for((xf) = ((&msg->payload[3])->tqh_first); (xf) != ((void *)0); (xf) = ((xf)->link.tqe_next)) { | |||
| 1247 | /* | |||
| 1248 | * XXX We could check that the proposal each transform | |||
| 1249 | * belongs to is unique. | |||
| 1250 | */ | |||
| 1251 | ||||
| 1252 | if (sa_add_transform(sa, xf, exchange->initiator, &proto)) | |||
| 1253 | return -1; | |||
| 1254 | ||||
| 1255 | /* XXX Check that the chosen transform matches an offer. */ | |||
| 1256 | ||||
| 1257 | ipsec_decode_transform(msg, sa, proto, xf->p); | |||
| 1258 | } | |||
| 1259 | ||||
| 1260 | /* Now remove offers that we don't need anymore. */ | |||
| 1261 | for (proto = TAILQ_FIRST(&sa->protos)((&sa->protos)->tqh_first); proto; proto = next_proto) { | |||
| 1262 | next_proto = TAILQ_NEXT(proto, link)((proto)->link.tqe_next); | |||
| 1263 | if (!proto->chosen) | |||
| 1264 | proto_free(proto); | |||
| 1265 | } | |||
| 1266 | ||||
| 1267 | if (!check_policy(exchange, sa, msg->isakmp_sa)) { | |||
| 1268 | message_drop(msg, ISAKMP_NOTIFY_NO_PROPOSAL_CHOSEN14, 0, 1, 0); | |||
| 1269 | log_print("initiator_recv_HASH_SA_NONCE: policy check failed"); | |||
| 1270 | return -1; | |||
| 1271 | } | |||
| 1272 | ||||
| 1273 | /* Mark the SA as handled. */ | |||
| 1274 | sa_p->flags |= PL_MARK1; | |||
| 1275 | ||||
| 1276 | isa = sa->data; | |||
| 1277 | if ((isa->group_desc && | |||
| 1278 | (!ie->group || ie->group->id != isa->group_desc)) || | |||
| 1279 | (!isa->group_desc && ie->group)) { | |||
| 1280 | log_print("initiator_recv_HASH_SA_NONCE: disagreement on PFS"); | |||
| 1281 | return -1; | |||
| 1282 | } | |||
| 1283 | /* Copy out the initiator's nonce. */ | |||
| 1284 | if (exchange_save_nonce(msg)) | |||
| 1285 | return -1; | |||
| 1286 | ||||
| 1287 | /* Handle the optional KEY_EXCH payload. */ | |||
| 1288 | if (kep && ipsec_save_g_x(msg)) | |||
| 1289 | return -1; | |||
| 1290 | ||||
| 1291 | return 0; | |||
| 1292 | } | |||
| 1293 | ||||
| 1294 | static int | |||
| 1295 | initiator_send_HASH(struct message *msg) | |||
| 1296 | { | |||
| 1297 | struct exchange *exchange = msg->exchange; | |||
| 1298 | struct ipsec_exch *ie = exchange->data; | |||
| 1299 | struct sa *isakmp_sa = msg->isakmp_sa; | |||
| 1300 | struct ipsec_sa *isa = isakmp_sa->data; | |||
| 1301 | struct prf *prf; | |||
| 1302 | u_int8_t *buf; | |||
| 1303 | struct hash *hash = hash_get(isa->hash); | |||
| 1304 | ||||
| 1305 | /* | |||
| 1306 | * We want a HASH payload to start with. XXX Share with | |||
| 1307 | * ike_main_mode.c? | |||
| 1308 | */ | |||
| 1309 | buf = malloc(ISAKMP_HASH_SZ4 + hash->hashsize); | |||
| 1310 | if (!buf) { | |||
| 1311 | log_error("initiator_send_HASH: malloc (%lu) failed", | |||
| 1312 | ISAKMP_HASH_SZ4 + (unsigned long)hash->hashsize); | |||
| 1313 | return -1; | |||
| 1314 | } | |||
| 1315 | if (message_add_payload(msg, ISAKMP_PAYLOAD_HASH8, buf, | |||
| 1316 | ISAKMP_HASH_SZ4 + hash->hashsize, 1)) { | |||
| 1317 | free(buf); | |||
| 1318 | return -1; | |||
| 1319 | } | |||
| 1320 | /* Allocate the prf and start calculating our HASH(3). XXX Share? */ | |||
| 1321 | 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) | |||
| 1322 | isa->skeyid_a, isa->skeyid_len))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: SKEYID_a" , isa->skeyid_a, isa->skeyid_len); | |||
| 1323 | prf = prf_alloc(isa->prf_type, isa->hash, isa->skeyid_a, | |||
| 1324 | isa->skeyid_len); | |||
| 1325 | if (!prf) | |||
| 1326 | return -1; | |||
| 1327 | prf->Init(prf->prfctx); | |||
| 1328 | prf->Update(prf->prfctx, (unsigned char *)"\0", 1); | |||
| 1329 | 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) | |||
| 1330 | exchange->message_id, ISAKMP_HDR_MESSAGE_ID_LEN))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: message_id" , exchange->message_id, 4); | |||
| 1331 | prf->Update(prf->prfctx, exchange->message_id, | |||
| 1332 | ISAKMP_HDR_MESSAGE_ID_LEN4); | |||
| 1333 | 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) | |||
| 1334 | 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); | |||
| 1335 | prf->Update(prf->prfctx, exchange->nonce_i, exchange->nonce_i_len); | |||
| 1336 | 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) | |||
| 1337 | 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); | |||
| 1338 | prf->Update(prf->prfctx, exchange->nonce_r, exchange->nonce_r_len); | |||
| 1339 | prf->Final(buf + ISAKMP_GEN_SZ4, prf->prfctx); | |||
| 1340 | prf_free(prf); | |||
| 1341 | 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) | |||
| 1342 | buf + ISAKMP_GEN_SZ, hash->hashsize))log_debug_buf (LOG_NEGOTIATION, 90, "initiator_send_HASH: HASH(3)" , buf + 4, hash->hashsize); | |||
| 1343 | ||||
| 1344 | if (ie->group) | |||
| 1345 | message_register_post_send(msg, gen_g_xy); | |||
| 1346 | ||||
| 1347 | message_register_post_send(msg, post_quick_mode); | |||
| 1348 | ||||
| 1349 | return 0; | |||
| 1350 | } | |||
| 1351 | ||||
| 1352 | static void | |||
| 1353 | post_quick_mode(struct message *msg) | |||
| 1354 | { | |||
| 1355 | struct sa *isakmp_sa = msg->isakmp_sa; | |||
| 1356 | struct ipsec_sa *isa = isakmp_sa->data; | |||
| 1357 | struct exchange *exchange = msg->exchange; | |||
| 1358 | struct ipsec_exch *ie = exchange->data; | |||
| 1359 | struct prf *prf; | |||
| 1360 | struct sa *sa; | |||
| 1361 | struct proto *proto; | |||
| 1362 | struct ipsec_proto *iproto; | |||
| 1363 | u_int8_t *keymat; | |||
| 1364 | int i; | |||
| 1365 | ||||
| 1366 | /* | |||
| 1367 | * Loop over all SA negotiations and do both an in- and an outgoing SA | |||
| 1368 | * per protocol. | |||
| 1369 | */ | |||
| 1370 | for (sa = TAILQ_FIRST(&exchange->sa_list)((&exchange->sa_list)->tqh_first); sa; | |||
| 1371 | sa = TAILQ_NEXT(sa, next)((sa)->next.tqe_next)) { | |||
| 1372 | for (proto = TAILQ_FIRST(&sa->protos)((&sa->protos)->tqh_first); proto; | |||
| 1373 | proto = TAILQ_NEXT(proto, link)((proto)->link.tqe_next)) { | |||
| 1374 | if (proto->proto == IPSEC_PROTO_IPCOMP4) | |||
| 1375 | continue; | |||
| 1376 | ||||
| 1377 | iproto = proto->data; | |||
| 1378 | ||||
| 1379 | /* | |||
| 1380 | * There are two SAs for each SA negotiation, | |||
| 1381 | * incoming and outgoing. | |||
| 1382 | */ | |||
| 1383 | for (i = 0; i < 2; i++) { | |||
| 1384 | prf = prf_alloc(isa->prf_type, isa->hash, | |||
| 1385 | isa->skeyid_d, isa->skeyid_len); | |||
| 1386 | if (!prf) { | |||
| 1387 | /* XXX What to do? */ | |||
| 1388 | continue; | |||
| 1389 | } | |||
| 1390 | ie->keymat_len = ipsec_keymat_length(proto); | |||
| 1391 | ||||
| 1392 | /* | |||
| 1393 | * We need to roundup the length of the key | |||
| 1394 | * material buffer to a multiple of the PRF's | |||
| 1395 | * blocksize as it is generated in chunks of | |||
| 1396 | * that blocksize. | |||
| 1397 | */ | |||
| 1398 | iproto->keymat[i] | |||
| 1399 | = malloc(((ie->keymat_len + prf->blocksize - 1) | |||
| 1400 | / prf->blocksize) * prf->blocksize); | |||
| 1401 | if (!iproto->keymat[i]) { | |||
| 1402 | log_error("post_quick_mode: " | |||
| 1403 | "malloc (%lu) failed", | |||
| 1404 | (((unsigned long)ie->keymat_len + | |||
| 1405 | prf->blocksize - 1) / prf->blocksize) * | |||
| 1406 | prf->blocksize); | |||
| 1407 | /* XXX What more to do? */ | |||
| 1408 | free(prf); | |||
| 1409 | continue; | |||
| 1410 | } | |||
| 1411 | for (keymat = iproto->keymat[i]; | |||
| 1412 | keymat < iproto->keymat[i] + ie->keymat_len; | |||
| 1413 | keymat += prf->blocksize) { | |||
| 1414 | prf->Init(prf->prfctx); | |||
| 1415 | ||||
| 1416 | if (keymat != iproto->keymat[i]) { | |||
| 1417 | /* | |||
| 1418 | * Hash in last round's | |||
| 1419 | * KEYMAT. | |||
| 1420 | */ | |||
| 1421 | LOG_DBG_BUF((LOG_NEGOTIATION,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "last KEYMAT" , keymat - prf->blocksize, prf->blocksize) | |||
| 1422 | 90, "post_quick_mode: "log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "last KEYMAT" , keymat - prf->blocksize, prf->blocksize) | |||
| 1423 | "last KEYMAT",log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "last KEYMAT" , keymat - prf->blocksize, prf->blocksize) | |||
| 1424 | keymat - prf->blocksize,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "last KEYMAT" , keymat - prf->blocksize, prf->blocksize) | |||
| 1425 | prf->blocksize))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "last KEYMAT" , keymat - prf->blocksize, prf->blocksize); | |||
| 1426 | prf->Update(prf->prfctx, | |||
| 1427 | keymat - prf->blocksize, | |||
| 1428 | prf->blocksize); | |||
| 1429 | } | |||
| 1430 | /* If PFS is used hash in g^xy. */ | |||
| 1431 | if (ie->g_xy) { | |||
| 1432 | LOG_DBG_BUF((LOG_NEGOTIATION,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "g^xy" , ie->g_xy, ie->g_xy_len) | |||
| 1433 | 90, "post_quick_mode: "log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "g^xy" , ie->g_xy, ie->g_xy_len) | |||
| 1434 | "g^xy", ie->g_xy,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "g^xy" , ie->g_xy, ie->g_xy_len) | |||
| 1435 | ie->g_xy_len))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: " "g^xy" , ie->g_xy, ie->g_xy_len); | |||
| 1436 | prf->Update(prf->prfctx, | |||
| 1437 | ie->g_xy, ie->g_xy_len); | |||
| 1438 | } | |||
| 1439 | LOG_DBG((LOG_NEGOTIATION, 90,log_debug (LOG_NEGOTIATION, 90, "post_quick_mode: " "suite %d proto %d" , proto->no, proto->proto) | |||
| 1440 | "post_quick_mode: "log_debug (LOG_NEGOTIATION, 90, "post_quick_mode: " "suite %d proto %d" , proto->no, proto->proto) | |||
| 1441 | "suite %d proto %d", proto->no,log_debug (LOG_NEGOTIATION, 90, "post_quick_mode: " "suite %d proto %d" , proto->no, proto->proto) | |||
| 1442 | proto->proto))log_debug (LOG_NEGOTIATION, 90, "post_quick_mode: " "suite %d proto %d" , proto->no, proto->proto); | |||
| 1443 | prf->Update(prf->prfctx, &proto->proto, | |||
| 1444 | 1); | |||
| 1445 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: SPI", proto ->spi[i], proto->spi_sz[i]) | |||
| 1446 | "post_quick_mode: SPI",log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: SPI", proto ->spi[i], proto->spi_sz[i]) | |||
| 1447 | proto->spi[i], proto->spi_sz[i]))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: SPI", proto ->spi[i], proto->spi_sz[i]); | |||
| 1448 | prf->Update(prf->prfctx, | |||
| 1449 | proto->spi[i], proto->spi_sz[i]); | |||
| 1450 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Ni_b", exchange ->nonce_i, exchange->nonce_i_len) | |||
| 1451 | "post_quick_mode: Ni_b",log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Ni_b", exchange ->nonce_i, exchange->nonce_i_len) | |||
| 1452 | exchange->nonce_i,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Ni_b", exchange ->nonce_i, exchange->nonce_i_len) | |||
| 1453 | exchange->nonce_i_len))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Ni_b", exchange ->nonce_i, exchange->nonce_i_len); | |||
| 1454 | prf->Update(prf->prfctx, | |||
| 1455 | exchange->nonce_i, | |||
| 1456 | exchange->nonce_i_len); | |||
| 1457 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Nr_b", exchange ->nonce_r, exchange->nonce_r_len) | |||
| 1458 | "post_quick_mode: Nr_b",log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Nr_b", exchange ->nonce_r, exchange->nonce_r_len) | |||
| 1459 | exchange->nonce_r,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Nr_b", exchange ->nonce_r, exchange->nonce_r_len) | |||
| 1460 | exchange->nonce_r_len))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: Nr_b", exchange ->nonce_r, exchange->nonce_r_len); | |||
| 1461 | prf->Update(prf->prfctx, | |||
| 1462 | exchange->nonce_r, | |||
| 1463 | exchange->nonce_r_len); | |||
| 1464 | prf->Final(keymat, prf->prfctx); | |||
| 1465 | } | |||
| 1466 | prf_free(prf); | |||
| 1467 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: KEYMAT" , iproto->keymat[i], ie->keymat_len) | |||
| 1468 | "post_quick_mode: KEYMAT",log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: KEYMAT" , iproto->keymat[i], ie->keymat_len) | |||
| 1469 | iproto->keymat[i], ie->keymat_len))log_debug_buf (LOG_NEGOTIATION, 90, "post_quick_mode: KEYMAT" , iproto->keymat[i], ie->keymat_len); | |||
| 1470 | } | |||
| 1471 | } | |||
| 1472 | } | |||
| 1473 | ||||
| 1474 | log_verbose("isakmpd: quick mode done%s: %s", | |||
| 1475 | (exchange->initiator == 0) ? " (as responder)" : "", | |||
| 1476 | !msg->isakmp_sa || !msg->isakmp_sa->transport ? "<no transport>" | |||
| 1477 | : msg->isakmp_sa->transport->vtbl->decode_ids | |||
| 1478 | (msg->isakmp_sa->transport)); | |||
| 1479 | } | |||
| 1480 | ||||
| 1481 | /* | |||
| 1482 | * Accept a set of transforms offered by the initiator and chose one we can | |||
| 1483 | * handle. | |||
| 1484 | * XXX Describe in more detail. | |||
| 1485 | */ | |||
| 1486 | static int | |||
| 1487 | responder_recv_HASH_SA_NONCE(struct message *msg) | |||
| 1488 | { | |||
| 1489 | struct payload *hashp, *kep, *idp; | |||
| 1490 | struct sa *sa; | |||
| 1491 | struct sa *isakmp_sa = msg->isakmp_sa; | |||
| 1492 | struct ipsec_sa *isa = isakmp_sa->data; | |||
| 1493 | struct exchange *exchange = msg->exchange; | |||
| 1494 | struct ipsec_exch *ie = exchange->data; | |||
| 1495 | struct prf *prf; | |||
| 1496 | u_int8_t *hash, *my_hash = 0; | |||
| 1497 | size_t hash_len; | |||
| 1498 | u_int8_t *pkt = msg->iov[0].iov_base; | |||
| 1499 | u_int8_t group_desc = 0; | |||
| 1500 | int retval = -1; | |||
| 1501 | struct proto *proto; | |||
| 1502 | struct sockaddr *src, *dst; | |||
| 1503 | char *name; | |||
| 1504 | ||||
| 1505 | hashp = payload_first(msg, ISAKMP_PAYLOAD_HASH8); | |||
| 1506 | hash = hashp->p; | |||
| 1507 | hashp->flags |= PL_MARK1; | |||
| 1508 | ||||
| 1509 | /* The HASH payload should be the first one. */ | |||
| 1510 | if (hash != pkt + ISAKMP_HDR_SZ28) { | |||
| 1511 | /* XXX Is there a better notification type? */ | |||
| 1512 | message_drop(msg, ISAKMP_NOTIFY_PAYLOAD_MALFORMED16, 0, 1, 0); | |||
| 1513 | goto cleanup; | |||
| 1514 | } | |||
| 1515 | hash_len = GET_ISAKMP_GEN_LENGTH(hash)field_get_num (isakmp_gen_fld + 2, hash); | |||
| 1516 | my_hash = malloc(hash_len - ISAKMP_GEN_SZ4); | |||
| 1517 | if (!my_hash) { | |||
| 1518 | log_error("responder_recv_HASH_SA_NONCE: malloc (%lu) failed", | |||
| 1519 | (unsigned long)hash_len - ISAKMP_GEN_SZ4); | |||
| 1520 | goto cleanup; | |||
| 1521 | } | |||
| 1522 | /* | |||
| 1523 | * Check the payload's integrity. | |||
| 1524 | * XXX Share with ipsec_fill_in_hash? | |||
| 1525 | */ | |||
| 1526 | 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) | |||
| 1527 | "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); | |||
| 1528 | prf = prf_alloc(isa->prf_type, isa->hash, isa->skeyid_a, | |||
| 1529 | isa->skeyid_len); | |||
| 1530 | if (!prf) | |||
| 1531 | goto cleanup; | |||
| 1532 | prf->Init(prf->prfctx); | |||
| 1533 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: message_id" , exchange->message_id, 4) | |||
| 1534 | "responder_recv_HASH_SA_NONCE: message_id",log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: message_id" , exchange->message_id, 4) | |||
| 1535 | 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); | |||
| 1536 | prf->Update(prf->prfctx, exchange->message_id, | |||
| 1537 | ISAKMP_HDR_MESSAGE_ID_LEN4); | |||
| 1538 | 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) | |||
| 1539 | "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) | |||
| 1540 | 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) | |||
| 1541 | 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); | |||
| 1542 | prf->Update(prf->prfctx, hash + hash_len, | |||
| 1543 | msg->iov[0].iov_len - ISAKMP_HDR_SZ28 - hash_len); | |||
| 1544 | prf->Final(my_hash, prf->prfctx); | |||
| 1545 | prf_free(prf); | |||
| 1546 | 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) | |||
| 1547 | "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) | |||
| 1548 | hash_len - ISAKMP_GEN_SZ))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH_SA_NONCE: computed HASH(1)" , my_hash, hash_len - 4); | |||
| 1549 | if (memcmp(hash + ISAKMP_GEN_SZ4, my_hash, hash_len - ISAKMP_GEN_SZ4) | |||
| 1550 | != 0) { | |||
| 1551 | message_drop(msg, ISAKMP_NOTIFY_INVALID_HASH_INFORMATION23, 0, | |||
| 1552 | 1, 0); | |||
| 1553 | goto cleanup; | |||
| 1554 | } | |||
| 1555 | free(my_hash); | |||
| 1556 | my_hash = 0; | |||
| 1557 | ||||
| 1558 | /* Mark message as authenticated. */ | |||
| 1559 | msg->flags |= MSG_AUTHENTICATED0x10; | |||
| 1560 | ||||
| 1561 | kep = payload_first(msg, ISAKMP_PAYLOAD_KEY_EXCH4); | |||
| 1562 | if (kep) | |||
| 1563 | ie->pfs = 1; | |||
| 1564 | ||||
| 1565 | /* Drop message when it contains ID types we do not implement yet. */ | |||
| 1566 | TAILQ_FOREACH(idp, &msg->payload[ISAKMP_PAYLOAD_ID], link)for((idp) = ((&msg->payload[5])->tqh_first); (idp) != ((void *)0); (idp) = ((idp)->link.tqe_next)) { | |||
| 1567 | switch (GET_ISAKMP_ID_TYPE(idp->p)field_get_num (isakmp_id_fld + 0, idp->p)) { | |||
| 1568 | case IPSEC_ID_IPV4_ADDR1: | |||
| 1569 | case IPSEC_ID_IPV4_ADDR_SUBNET4: | |||
| 1570 | case IPSEC_ID_IPV6_ADDR5: | |||
| 1571 | case IPSEC_ID_IPV6_ADDR_SUBNET6: | |||
| 1572 | break; | |||
| 1573 | ||||
| 1574 | case IPSEC_ID_FQDN2: | |||
| 1575 | /* | |||
| 1576 | * FQDN may be used for in NAT-T with transport mode. | |||
| 1577 | * We can handle the message in this case. In the | |||
| 1578 | * other cases we'll drop the message later. | |||
| 1579 | */ | |||
| 1580 | break; | |||
| 1581 | ||||
| 1582 | default: | |||
| 1583 | message_drop(msg, ISAKMP_NOTIFY_INVALID_ID_INFORMATION18, | |||
| 1584 | 0, 1, 0); | |||
| 1585 | goto cleanup; | |||
| 1586 | } | |||
| 1587 | } | |||
| 1588 | ||||
| 1589 | /* Handle optional client ID payloads. */ | |||
| 1590 | idp = payload_first(msg, ISAKMP_PAYLOAD_ID5); | |||
| 1591 | if (idp) { | |||
| 1592 | /* If IDci is there, IDcr must be too. */ | |||
| 1593 | if (!TAILQ_NEXT(idp, link)((idp)->link.tqe_next)) { | |||
| 1594 | /* XXX Is this a good notify type? */ | |||
| 1595 | message_drop(msg, ISAKMP_NOTIFY_PAYLOAD_MALFORMED16, 0, | |||
| 1596 | 1, 0); | |||
| 1597 | goto cleanup; | |||
| 1598 | } | |||
| 1599 | ie->id_ci_sz = GET_ISAKMP_GEN_LENGTH(idp->p)field_get_num (isakmp_gen_fld + 2, idp->p); | |||
| 1600 | ie->id_ci = malloc(ie->id_ci_sz); | |||
| 1601 | if (!ie->id_ci) { | |||
| 1602 | log_error("responder_recv_HASH_SA_NONCE: " | |||
| 1603 | "malloc (%lu) failed", | |||
| 1604 | (unsigned long)ie->id_ci_sz); | |||
| 1605 | goto cleanup; | |||
| 1606 | } | |||
| 1607 | memcpy(ie->id_ci, idp->p, ie->id_ci_sz); | |||
| 1608 | idp->flags |= PL_MARK1; | |||
| 1609 | 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) | |||
| 1610 | "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) | |||
| 1611 | 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); | |||
| 1612 | ||||
| 1613 | idp = TAILQ_NEXT(idp, link)((idp)->link.tqe_next); | |||
| 1614 | ie->id_cr_sz = GET_ISAKMP_GEN_LENGTH(idp->p)field_get_num (isakmp_gen_fld + 2, idp->p); | |||
| 1615 | ie->id_cr = malloc(ie->id_cr_sz); | |||
| 1616 | if (!ie->id_cr) { | |||
| 1617 | log_error("responder_recv_HASH_SA_NONCE: " | |||
| 1618 | "malloc (%lu) failed", | |||
| 1619 | (unsigned long)ie->id_cr_sz); | |||
| 1620 | goto cleanup; | |||
| 1621 | } | |||
| 1622 | memcpy(ie->id_cr, idp->p, ie->id_cr_sz); | |||
| 1623 | idp->flags |= PL_MARK1; | |||
| 1624 | 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) | |||
| 1625 | "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) | |||
| 1626 | 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); | |||
| 1627 | } else { | |||
| 1628 | /* | |||
| 1629 | * If client identifiers are not present in the exchange, | |||
| 1630 | * we fake them. RFC 2409 states: | |||
| 1631 | * The identities of the SAs negotiated in Quick Mode are | |||
| 1632 | * implicitly assumed to be the IP addresses of the ISAKMP | |||
| 1633 | * peers, without any constraints on the protocol or port | |||
| 1634 | * numbers allowed, unless client identifiers are specified | |||
| 1635 | * in Quick Mode. | |||
| 1636 | * | |||
| 1637 | * -- Michael Paddon (mwp@aba.net.au) | |||
| 1638 | */ | |||
| 1639 | ||||
| 1640 | ie->flags = IPSEC_EXCH_FLAG_NO_ID1; | |||
| 1641 | ||||
| 1642 | /* Get initiator and responder addresses. */ | |||
| 1643 | msg->transport->vtbl->get_src(msg->transport, &src); | |||
| 1644 | msg->transport->vtbl->get_dst(msg->transport, &dst); | |||
| 1645 | ie->id_ci_sz = ISAKMP_ID_DATA_OFF8 + sockaddr_addrlen(src); | |||
| 1646 | ie->id_cr_sz = ISAKMP_ID_DATA_OFF8 + sockaddr_addrlen(dst); | |||
| 1647 | ie->id_ci = calloc(ie->id_ci_sz, sizeof(char)); | |||
| 1648 | ie->id_cr = calloc(ie->id_cr_sz, sizeof(char)); | |||
| 1649 | ||||
| 1650 | if (!ie->id_ci || !ie->id_cr) { | |||
| 1651 | log_error("responder_recv_HASH_SA_NONCE: " | |||
| 1652 | "calloc (%lu, %lu) failed", | |||
| 1653 | (unsigned long)ie->id_ci_sz, | |||
| 1654 | (unsigned long)sizeof(char)); | |||
| 1655 | goto cleanup; | |||
| 1656 | } | |||
| 1657 | if (src->sa_family != dst->sa_family) { | |||
| 1658 | log_error("initiator_recv_HASH_SA_NONCE: " | |||
| 1659 | "sa_family mismatch"); | |||
| 1660 | goto cleanup; | |||
| 1661 | } | |||
| 1662 | switch (src->sa_family) { | |||
| 1663 | case AF_INET2: | |||
| 1664 | SET_ISAKMP_ID_TYPE(ie->id_ci, IPSEC_ID_IPV4_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_ci, 1); | |||
| 1665 | SET_ISAKMP_ID_TYPE(ie->id_cr, IPSEC_ID_IPV4_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_cr, 1); | |||
| 1666 | break; | |||
| 1667 | ||||
| 1668 | case AF_INET624: | |||
| 1669 | SET_ISAKMP_ID_TYPE(ie->id_ci, IPSEC_ID_IPV6_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_ci, 5); | |||
| 1670 | SET_ISAKMP_ID_TYPE(ie->id_cr, IPSEC_ID_IPV6_ADDR)field_set_num (isakmp_id_fld + 0, ie->id_cr, 5); | |||
| 1671 | break; | |||
| 1672 | ||||
| 1673 | default: | |||
| 1674 | log_error("initiator_recv_HASH_SA_NONCE: " | |||
| 1675 | "unknown sa_family %d", src->sa_family); | |||
| 1676 | goto cleanup; | |||
| 1677 | } | |||
| 1678 | ||||
| 1679 | memcpy(ie->id_cr + ISAKMP_ID_DATA_OFF8, sockaddr_addrdata(src), | |||
| 1680 | sockaddr_addrlen(src)); | |||
| 1681 | memcpy(ie->id_ci + ISAKMP_ID_DATA_OFF8, sockaddr_addrdata(dst), | |||
| 1682 | sockaddr_addrlen(dst)); | |||
| 1683 | } | |||
| 1684 | ||||
| 1685 | if (message_negotiate_sa(msg, check_policy)) | |||
| 1686 | goto cleanup; | |||
| 1687 | ||||
| 1688 | for (sa = TAILQ_FIRST(&exchange->sa_list)((&exchange->sa_list)->tqh_first); sa; | |||
| 1689 | sa = TAILQ_NEXT(sa, next)((sa)->next.tqe_next)) { | |||
| 1690 | for (proto = TAILQ_FIRST(&sa->protos)((&sa->protos)->tqh_first); proto; | |||
| 1691 | proto = TAILQ_NEXT(proto, link)((proto)->link.tqe_next)) { | |||
| 1692 | /* | |||
| 1693 | * XXX we need to have some attributes per proto, not | |||
| 1694 | * all per SA. | |||
| 1695 | */ | |||
| 1696 | ipsec_decode_transform(msg, sa, proto, | |||
| 1697 | proto->chosen->p); | |||
| 1698 | if (proto->proto == IPSEC_PROTO_IPSEC_AH2 && | |||
| 1699 | !((struct ipsec_proto *)proto->data)->auth) { | |||
| 1700 | log_print("responder_recv_HASH_SA_NONCE: " | |||
| 1701 | "AH proposed without an algorithm " | |||
| 1702 | "attribute"); | |||
| 1703 | message_drop(msg, | |||
| 1704 | ISAKMP_NOTIFY_NO_PROPOSAL_CHOSEN14, 0, 1, 0); | |||
| 1705 | goto next_sa; | |||
| 1706 | } | |||
| 1707 | } | |||
| 1708 | ||||
| 1709 | isa = sa->data; | |||
| 1710 | ||||
| 1711 | /* | |||
| 1712 | * The group description is mandatory if we got a KEY_EXCH | |||
| 1713 | * payload. | |||
| 1714 | */ | |||
| 1715 | if (kep) { | |||
| 1716 | if (!isa->group_desc) { | |||
| 1717 | log_print("responder_recv_HASH_SA_NONCE: " | |||
| 1718 | "KEY_EXCH payload without a group " | |||
| 1719 | "desc. attribute"); | |||
| 1720 | message_drop(msg, | |||
| 1721 | ISAKMP_NOTIFY_NO_PROPOSAL_CHOSEN14, 0, 1, 0); | |||
| 1722 | continue; | |||
| 1723 | } | |||
| 1724 | /* Also, all SAs must have equal groups. */ | |||
| 1725 | if (!group_desc) | |||
| 1726 | group_desc = isa->group_desc; | |||
| 1727 | else if (group_desc != isa->group_desc) { | |||
| 1728 | log_print("responder_recv_HASH_SA_NONCE: " | |||
| 1729 | "differing group descriptions in one QM"); | |||
| 1730 | message_drop(msg, | |||
| 1731 | ISAKMP_NOTIFY_NO_PROPOSAL_CHOSEN14, 0, 1, 0); | |||
| 1732 | continue; | |||
| 1733 | } | |||
| 1734 | } | |||
| 1735 | /* At least one SA was accepted. */ | |||
| 1736 | retval = 0; | |||
| 1737 | ||||
| 1738 | next_sa: | |||
| 1739 | ; /* XXX gcc3 wants this. */ | |||
| 1740 | } | |||
| 1741 | ||||
| 1742 | if (kep) { | |||
| 1743 | ie->group = group_get(group_desc); | |||
| 1744 | if (!ie->group) { | |||
| 1745 | /* | |||
| 1746 | * XXX If the error was due to an out-of-range group | |||
| 1747 | * description we should notify our peer, but this | |||
| 1748 | * should probably be done by the attribute | |||
| 1749 | * validation. Is it? | |||
| 1750 | */ | |||
| 1751 | goto cleanup; | |||
| 1752 | } | |||
| 1753 | } | |||
| 1754 | /* Copy out the initiator's nonce. */ | |||
| 1755 | if (exchange_save_nonce(msg)) | |||
| 1756 | goto cleanup; | |||
| 1757 | ||||
| 1758 | /* Handle the optional KEY_EXCH payload. */ | |||
| 1759 | if (kep && ipsec_save_g_x(msg)) | |||
| 1760 | goto cleanup; | |||
| 1761 | ||||
| 1762 | /* | |||
| 1763 | * Try to find and set the connection name on the exchange. | |||
| 1764 | */ | |||
| 1765 | ||||
| 1766 | /* | |||
| 1767 | * Check for accepted identities as well as lookup the connection | |||
| 1768 | * name and set it on the exchange. | |||
| 1769 | * | |||
| 1770 | * When not using policies make sure the peer proposes sane IDs. | |||
| 1771 | * Otherwise this is done by KeyNote. | |||
| 1772 | */ | |||
| 1773 | name = connection_passive_lookup_by_ids(ie->id_ci, ie->id_cr); | |||
| 1774 | if (name) { | |||
| 1775 | exchange->name = strdup(name); | |||
| 1776 | if (!exchange->name) { | |||
| 1777 | log_error("responder_recv_HASH_SA_NONCE: " | |||
| 1778 | "strdup (\"%s\") failed", name); | |||
| 1779 | goto cleanup; | |||
| 1780 | } | |||
| 1781 | } else if ( | |||
| 1782 | ignore_policy || | |||
| 1783 | strncmp("yes", conf_get_str("General", "Use-Keynote"), 3)) { | |||
| 1784 | log_print("responder_recv_HASH_SA_NONCE: peer proposed " | |||
| 1785 | "invalid phase 2 IDs: %s", | |||
| 1786 | (exchange->doi->decode_ids("initiator id %s, responder" | |||
| 1787 | " id %s", ie->id_ci, ie->id_ci_sz, ie->id_cr, | |||
| 1788 | ie->id_cr_sz, 1))); | |||
| 1789 | message_drop(msg, ISAKMP_NOTIFY_INVALID_ID_INFORMATION18, 0, 1, | |||
| 1790 | 0); | |||
| 1791 | goto cleanup; | |||
| 1792 | } | |||
| 1793 | ||||
| 1794 | return retval; | |||
| 1795 | ||||
| 1796 | cleanup: | |||
| 1797 | /* Remove all potential protocols that have been added to the SAs. */ | |||
| 1798 | for (sa = TAILQ_FIRST(&exchange->sa_list)((&exchange->sa_list)->tqh_first); sa; | |||
| 1799 | sa = TAILQ_NEXT(sa, next)((sa)->next.tqe_next)) | |||
| 1800 | while ((proto = TAILQ_FIRST(&sa->protos)((&sa->protos)->tqh_first)) != 0) | |||
| 1801 | proto_free(proto); | |||
| 1802 | free(my_hash); | |||
| 1803 | free(ie->id_ci); | |||
| 1804 | ie->id_ci = 0; | |||
| 1805 | free(ie->id_cr); | |||
| 1806 | ie->id_cr = 0; | |||
| 1807 | return -1; | |||
| 1808 | } | |||
| 1809 | ||||
| 1810 | /* Reply with the transform we chose. */ | |||
| 1811 | static int | |||
| 1812 | responder_send_HASH_SA_NONCE(struct message *msg) | |||
| 1813 | { | |||
| 1814 | struct exchange *exchange = msg->exchange; | |||
| 1815 | struct ipsec_exch *ie = exchange->data; | |||
| 1816 | struct sa *isakmp_sa = msg->isakmp_sa; | |||
| 1817 | struct ipsec_sa *isa = isakmp_sa->data; | |||
| 1818 | struct prf *prf; | |||
| 1819 | struct hash *hash = hash_get(isa->hash); | |||
| 1820 | size_t nonce_sz = exchange->nonce_i_len; | |||
| 1821 | u_int8_t *buf; | |||
| 1822 | int initiator = exchange->initiator; | |||
| 1823 | char header[80]; | |||
| 1824 | u_int32_t i; | |||
| 1825 | u_int8_t *id; | |||
| 1826 | size_t sz; | |||
| 1827 | ||||
| 1828 | /* | |||
| 1829 | * We want a HASH payload to start with. XXX Share with | |||
| 1830 | * ike_main_mode.c? | |||
| 1831 | */ | |||
| 1832 | buf = malloc(ISAKMP_HASH_SZ4 + hash->hashsize); | |||
| 1833 | if (!buf) { | |||
| 1834 | log_error("responder_send_HASH_SA_NONCE: malloc (%lu) failed", | |||
| 1835 | ISAKMP_HASH_SZ4 + (unsigned long)hash->hashsize); | |||
| 1836 | return -1; | |||
| 1837 | } | |||
| 1838 | if (message_add_payload(msg, ISAKMP_PAYLOAD_HASH8, buf, | |||
| 1839 | ISAKMP_HASH_SZ4 + hash->hashsize, 1)) { | |||
| 1840 | free(buf); | |||
| 1841 | return -1; | |||
| 1842 | } | |||
| 1843 | /* Add the SA payload(s) with the transform(s) that was/were chosen. */ | |||
| 1844 | if (message_add_sa_payload(msg)) | |||
| 1845 | return -1; | |||
| 1846 | ||||
| 1847 | /* Generate a nonce, and add it to the message. */ | |||
| 1848 | if (exchange_gen_nonce(msg, nonce_sz)) | |||
| 1849 | return -1; | |||
| 1850 | ||||
| 1851 | /* Generate optional KEY_EXCH payload. This is known as PFS. */ | |||
| 1852 | if (ie->group && ipsec_gen_g_x(msg)) | |||
| 1853 | return -1; | |||
| 1854 | ||||
| 1855 | /* | |||
| 1856 | * If the initiator client ID's were acceptable, just mirror them | |||
| 1857 | * back. | |||
| 1858 | */ | |||
| 1859 | if (!(ie->flags & IPSEC_EXCH_FLAG_NO_ID1)) { | |||
| 1860 | sz = ie->id_ci_sz; | |||
| 1861 | id = malloc(sz); | |||
| 1862 | if (!id) { | |||
| 1863 | log_error("responder_send_HASH_SA_NONCE: " | |||
| 1864 | "malloc (%lu) failed", (unsigned long)sz); | |||
| 1865 | return -1; | |||
| 1866 | } | |||
| 1867 | memcpy(id, ie->id_ci, sz); | |||
| 1868 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: IDic" , id, sz) | |||
| 1869 | "responder_send_HASH_SA_NONCE: IDic", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: IDic" , id, sz); | |||
| 1870 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { | |||
| 1871 | free(id); | |||
| 1872 | return -1; | |||
| 1873 | } | |||
| 1874 | sz = ie->id_cr_sz; | |||
| 1875 | id = malloc(sz); | |||
| 1876 | if (!id) { | |||
| 1877 | log_error("responder_send_HASH_SA_NONCE: " | |||
| 1878 | "malloc (%lu) failed", (unsigned long)sz); | |||
| 1879 | return -1; | |||
| 1880 | } | |||
| 1881 | memcpy(id, ie->id_cr, sz); | |||
| 1882 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: IDrc" , id, sz) | |||
| 1883 | "responder_send_HASH_SA_NONCE: IDrc", id, sz))log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: IDrc" , id, sz); | |||
| 1884 | if (message_add_payload(msg, ISAKMP_PAYLOAD_ID5, id, sz, 1)) { | |||
| 1885 | free(id); | |||
| 1886 | return -1; | |||
| 1887 | } | |||
| 1888 | } | |||
| 1889 | /* Allocate the prf and start calculating our HASH(2). XXX Share? */ | |||
| 1890 | LOG_DBG((LOG_NEGOTIATION, 90, "responder_recv_HASH: "log_debug (LOG_NEGOTIATION, 90, "responder_recv_HASH: " "isakmp_sa %p isa %p" , isakmp_sa, isa) | |||
| 1891 | "isakmp_sa %p isa %p", isakmp_sa, isa))log_debug (LOG_NEGOTIATION, 90, "responder_recv_HASH: " "isakmp_sa %p isa %p" , isakmp_sa, isa); | |||
| 1892 | 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) | |||
| 1893 | "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); | |||
| 1894 | prf = prf_alloc(isa->prf_type, hash->type, isa->skeyid_a, | |||
| 1895 | isa->skeyid_len); | |||
| 1896 | if (!prf) | |||
| 1897 | return -1; | |||
| 1898 | prf->Init(prf->prfctx); | |||
| 1899 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: message_id" , exchange->message_id, 4) | |||
| 1900 | "responder_send_HASH_SA_NONCE: message_id",log_debug_buf (LOG_NEGOTIATION, 90, "responder_send_HASH_SA_NONCE: message_id" , exchange->message_id, 4) | |||
| 1901 | 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); | |||
| 1902 | prf->Update(prf->prfctx, exchange->message_id, | |||
| 1903 | ISAKMP_HDR_MESSAGE_ID_LEN4); | |||
| 1904 | 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) | |||
| 1905 | "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); | |||
| 1906 | prf->Update(prf->prfctx, exchange->nonce_i, exchange->nonce_i_len); | |||
| 1907 | ||||
| 1908 | /* Loop over all payloads after HASH(2). */ | |||
| 1909 | for (i = 2; i < msg->iovlen; i++) { | |||
| 1910 | /* XXX Misleading payload type printouts. */ | |||
| 1911 | snprintf(header, sizeof header, | |||
| 1912 | "responder_send_HASH_SA_NONCE: payload %d after HASH(2)", | |||
| 1913 | i - 1); | |||
| 1914 | 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) | |||
| 1915 | msg->iov[i].iov_len))log_debug_buf (LOG_NEGOTIATION, 90, header, msg->iov[i].iov_base , msg->iov[i].iov_len); | |||
| 1916 | prf->Update(prf->prfctx, msg->iov[i].iov_base, | |||
| 1917 | msg->iov[i].iov_len); | |||
| 1918 | } | |||
| 1919 | prf->Final(buf + ISAKMP_HASH_DATA_OFF4, prf->prfctx); | |||
| 1920 | prf_free(prf); | |||
| 1921 | snprintf(header, sizeof header, "responder_send_HASH_SA_NONCE: " | |||
| 1922 | "HASH_%c", initiator ? 'I' : 'R'); | |||
| 1923 | LOG_DBG_BUF((LOG_NEGOTIATION, 80, header, buf + ISAKMP_HASH_DATA_OFF,log_debug_buf (LOG_NEGOTIATION, 80, header, buf + 4, hash-> hashsize) | |||
| 1924 | hash->hashsize))log_debug_buf (LOG_NEGOTIATION, 80, header, buf + 4, hash-> hashsize); | |||
| 1925 | ||||
| 1926 | if (ie->group) | |||
| 1927 | message_register_post_send(msg, gen_g_xy); | |||
| 1928 | ||||
| 1929 | return 0; | |||
| 1930 | } | |||
| 1931 | ||||
| 1932 | static void | |||
| 1933 | gen_g_xy(struct message *msg) | |||
| 1934 | { | |||
| 1935 | struct exchange *exchange = msg->exchange; | |||
| 1936 | struct ipsec_exch *ie = exchange->data; | |||
| 1937 | ||||
| 1938 | /* Compute Diffie-Hellman shared value. */ | |||
| 1939 | ie->g_xy_len = dh_secretlen(ie->group); | |||
| 1940 | ie->g_xy = malloc(ie->g_xy_len); | |||
| 1941 | if (!ie->g_xy) { | |||
| 1942 | log_error("gen_g_xy: malloc (%lu) failed", | |||
| 1943 | (unsigned long)ie->g_xy_len); | |||
| 1944 | return; | |||
| 1945 | } | |||
| 1946 | if (dh_create_shared(ie->group, ie->g_xy, | |||
| 1947 | exchange->initiator ? ie->g_xr : ie->g_xi)) { | |||
| 1948 | log_print("gen_g_xy: dh_create_shared failed"); | |||
| 1949 | return; | |||
| 1950 | } | |||
| 1951 | 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) | |||
| 1952 | ie->g_xy_len))log_debug_buf (LOG_NEGOTIATION, 80, "gen_g_xy: g^xy", ie-> g_xy, ie->g_xy_len); | |||
| 1953 | } | |||
| 1954 | ||||
| 1955 | static int | |||
| 1956 | responder_recv_HASH(struct message *msg) | |||
| 1957 | { | |||
| 1958 | struct exchange *exchange = msg->exchange; | |||
| 1959 | struct sa *isakmp_sa = msg->isakmp_sa; | |||
| 1960 | struct ipsec_sa *isa = isakmp_sa->data; | |||
| 1961 | struct prf *prf; | |||
| 1962 | u_int8_t *hash, *my_hash = 0; | |||
| 1963 | size_t hash_len; | |||
| 1964 | struct payload *hashp; | |||
| 1965 | ||||
| 1966 | /* Find HASH(3) and create our own hash, just as big. */ | |||
| 1967 | hashp = payload_first(msg, ISAKMP_PAYLOAD_HASH8); | |||
| 1968 | hash = hashp->p; | |||
| 1969 | hashp->flags |= PL_MARK1; | |||
| 1970 | hash_len = GET_ISAKMP_GEN_LENGTH(hash)field_get_num (isakmp_gen_fld + 2, hash); | |||
| 1971 | my_hash = malloc(hash_len - ISAKMP_GEN_SZ4); | |||
| 1972 | if (!my_hash) { | |||
| 1973 | log_error("responder_recv_HASH: malloc (%lu) failed", | |||
| 1974 | (unsigned long)hash_len - ISAKMP_GEN_SZ4); | |||
| 1975 | goto cleanup; | |||
| 1976 | } | |||
| 1977 | /* Allocate the prf and start calculating our HASH(3). XXX Share? */ | |||
| 1978 | LOG_DBG((LOG_NEGOTIATION, 90, "responder_recv_HASH: "log_debug (LOG_NEGOTIATION, 90, "responder_recv_HASH: " "isakmp_sa %p isa %p" , isakmp_sa, isa) | |||
| 1979 | "isakmp_sa %p isa %p", isakmp_sa, isa))log_debug (LOG_NEGOTIATION, 90, "responder_recv_HASH: " "isakmp_sa %p isa %p" , isakmp_sa, isa); | |||
| 1980 | 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) | |||
| 1981 | isa->skeyid_a, isa->skeyid_len))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: SKEYID_a" , isa->skeyid_a, isa->skeyid_len); | |||
| 1982 | prf = prf_alloc(isa->prf_type, isa->hash, isa->skeyid_a, | |||
| 1983 | isa->skeyid_len); | |||
| 1984 | if (!prf) | |||
| 1985 | goto cleanup; | |||
| 1986 | prf->Init(prf->prfctx); | |||
| 1987 | prf->Update(prf->prfctx, (unsigned char *)"\0", 1); | |||
| 1988 | 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) | |||
| 1989 | exchange->message_id, ISAKMP_HDR_MESSAGE_ID_LEN))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: message_id" , exchange->message_id, 4); | |||
| 1990 | prf->Update(prf->prfctx, exchange->message_id, | |||
| 1991 | ISAKMP_HDR_MESSAGE_ID_LEN4); | |||
| 1992 | 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) | |||
| 1993 | 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); | |||
| 1994 | prf->Update(prf->prfctx, exchange->nonce_i, exchange->nonce_i_len); | |||
| 1995 | 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) | |||
| 1996 | 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); | |||
| 1997 | prf->Update(prf->prfctx, exchange->nonce_r, exchange->nonce_r_len); | |||
| 1998 | prf->Final(my_hash, prf->prfctx); | |||
| 1999 | prf_free(prf); | |||
| 2000 | LOG_DBG_BUF((LOG_NEGOTIATION, 90,log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: computed HASH(3)" , my_hash, hash_len - 4) | |||
| 2001 | "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) | |||
| 2002 | hash_len - ISAKMP_GEN_SZ))log_debug_buf (LOG_NEGOTIATION, 90, "responder_recv_HASH: computed HASH(3)" , my_hash, hash_len - 4); | |||
| 2003 | if (memcmp(hash + ISAKMP_GEN_SZ4, my_hash, hash_len - ISAKMP_GEN_SZ4) | |||
| 2004 | != 0) { | |||
| 2005 | message_drop(msg, ISAKMP_NOTIFY_INVALID_HASH_INFORMATION23, 0, | |||
| 2006 | 1, 0); | |||
| 2007 | goto cleanup; | |||
| 2008 | } | |||
| 2009 | free(my_hash); | |||
| 2010 | ||||
| 2011 | /* Mark message as authenticated. */ | |||
| 2012 | msg->flags |= MSG_AUTHENTICATED0x10; | |||
| 2013 | ||||
| 2014 | post_quick_mode(msg); | |||
| 2015 | ||||
| 2016 | return 0; | |||
| 2017 | ||||
| 2018 | cleanup: | |||
| 2019 | free(my_hash); | |||
| 2020 | return -1; | |||
| 2021 | } |