ssl_asn1.c revision 296465
1/* ssl/ssl_asn1.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59#include <stdio.h> 60#include <stdlib.h> 61#include "ssl_locl.h" 62#include <openssl/asn1_mac.h> 63#include <openssl/objects.h> 64#include <openssl/x509.h> 65 66typedef struct ssl_session_asn1_st { 67 ASN1_INTEGER version; 68 ASN1_INTEGER ssl_version; 69 ASN1_OCTET_STRING cipher; 70 ASN1_OCTET_STRING comp_id; 71 ASN1_OCTET_STRING master_key; 72 ASN1_OCTET_STRING session_id; 73 ASN1_OCTET_STRING session_id_context; 74 ASN1_OCTET_STRING key_arg; 75#ifndef OPENSSL_NO_KRB5 76 ASN1_OCTET_STRING krb5_princ; 77#endif /* OPENSSL_NO_KRB5 */ 78 ASN1_INTEGER time; 79 ASN1_INTEGER timeout; 80 ASN1_INTEGER verify_result; 81#ifndef OPENSSL_NO_TLSEXT 82 ASN1_OCTET_STRING tlsext_hostname; 83 ASN1_INTEGER tlsext_tick_lifetime; 84 ASN1_OCTET_STRING tlsext_tick; 85#endif /* OPENSSL_NO_TLSEXT */ 86} SSL_SESSION_ASN1; 87 88int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp) 89{ 90#define LSIZE2 (sizeof(long)*2) 91 int v1 = 0, v2 = 0, v3 = 0, v4 = 0, v5 = 0; 92 unsigned char buf[4], ibuf1[LSIZE2], ibuf2[LSIZE2]; 93 unsigned char ibuf3[LSIZE2], ibuf4[LSIZE2], ibuf5[LSIZE2]; 94#ifndef OPENSSL_NO_TLSEXT 95 int v6 = 0, v9 = 0, v10 = 0; 96 unsigned char ibuf6[LSIZE2]; 97#endif 98#ifndef OPENSSL_NO_COMP 99 int v11 = 0; 100 unsigned char cbuf; 101#endif 102 long l; 103 SSL_SESSION_ASN1 a; 104 M_ASN1_I2D_vars(in); 105 106 if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0))) 107 return (0); 108 109 /* 110 * Note that I cheat in the following 2 assignments. I know that if the 111 * ASN1_INTEGER passed to ASN1_INTEGER_set is > sizeof(long)+1, the 112 * buffer will not be re-OPENSSL_malloc()ed. This is a bit evil but makes 113 * things simple, no dynamic allocation to clean up :-) 114 */ 115 a.version.length = LSIZE2; 116 a.version.type = V_ASN1_INTEGER; 117 a.version.data = ibuf1; 118 ASN1_INTEGER_set(&(a.version), SSL_SESSION_ASN1_VERSION); 119 120 a.ssl_version.length = LSIZE2; 121 a.ssl_version.type = V_ASN1_INTEGER; 122 a.ssl_version.data = ibuf2; 123 ASN1_INTEGER_set(&(a.ssl_version), in->ssl_version); 124 125 a.cipher.type = V_ASN1_OCTET_STRING; 126 a.cipher.data = buf; 127 128 if (in->cipher == NULL) 129 l = in->cipher_id; 130 else 131 l = in->cipher->id; 132 if (in->ssl_version == SSL2_VERSION) { 133 a.cipher.length = 3; 134 buf[0] = ((unsigned char)(l >> 16L)) & 0xff; 135 buf[1] = ((unsigned char)(l >> 8L)) & 0xff; 136 buf[2] = ((unsigned char)(l)) & 0xff; 137 } else { 138 a.cipher.length = 2; 139 buf[0] = ((unsigned char)(l >> 8L)) & 0xff; 140 buf[1] = ((unsigned char)(l)) & 0xff; 141 } 142 143#ifndef OPENSSL_NO_COMP 144 if (in->compress_meth) { 145 cbuf = (unsigned char)in->compress_meth; 146 a.comp_id.length = 1; 147 a.comp_id.type = V_ASN1_OCTET_STRING; 148 a.comp_id.data = &cbuf; 149 } 150#endif 151 152 a.master_key.length = in->master_key_length; 153 a.master_key.type = V_ASN1_OCTET_STRING; 154 a.master_key.data = in->master_key; 155 156 a.session_id.length = in->session_id_length; 157 a.session_id.type = V_ASN1_OCTET_STRING; 158 a.session_id.data = in->session_id; 159 160 a.session_id_context.length = in->sid_ctx_length; 161 a.session_id_context.type = V_ASN1_OCTET_STRING; 162 a.session_id_context.data = in->sid_ctx; 163 164 a.key_arg.length = in->key_arg_length; 165 a.key_arg.type = V_ASN1_OCTET_STRING; 166 a.key_arg.data = in->key_arg; 167 168#ifndef OPENSSL_NO_KRB5 169 if (in->krb5_client_princ_len) { 170 a.krb5_princ.length = in->krb5_client_princ_len; 171 a.krb5_princ.type = V_ASN1_OCTET_STRING; 172 a.krb5_princ.data = in->krb5_client_princ; 173 } 174#endif /* OPENSSL_NO_KRB5 */ 175 176 if (in->time != 0L) { 177 a.time.length = LSIZE2; 178 a.time.type = V_ASN1_INTEGER; 179 a.time.data = ibuf3; 180 ASN1_INTEGER_set(&(a.time), in->time); 181 } 182 183 if (in->timeout != 0L) { 184 a.timeout.length = LSIZE2; 185 a.timeout.type = V_ASN1_INTEGER; 186 a.timeout.data = ibuf4; 187 ASN1_INTEGER_set(&(a.timeout), in->timeout); 188 } 189 190 if (in->verify_result != X509_V_OK) { 191 a.verify_result.length = LSIZE2; 192 a.verify_result.type = V_ASN1_INTEGER; 193 a.verify_result.data = ibuf5; 194 ASN1_INTEGER_set(&a.verify_result, in->verify_result); 195 } 196#ifndef OPENSSL_NO_TLSEXT 197 if (in->tlsext_hostname) { 198 a.tlsext_hostname.length = strlen(in->tlsext_hostname); 199 a.tlsext_hostname.type = V_ASN1_OCTET_STRING; 200 a.tlsext_hostname.data = (unsigned char *)in->tlsext_hostname; 201 } 202 if (in->tlsext_tick) { 203 a.tlsext_tick.length = in->tlsext_ticklen; 204 a.tlsext_tick.type = V_ASN1_OCTET_STRING; 205 a.tlsext_tick.data = (unsigned char *)in->tlsext_tick; 206 } 207 if (in->tlsext_tick_lifetime_hint > 0) { 208 a.tlsext_tick_lifetime.length = LSIZE2; 209 a.tlsext_tick_lifetime.type = V_ASN1_INTEGER; 210 a.tlsext_tick_lifetime.data = ibuf6; 211 ASN1_INTEGER_set(&a.tlsext_tick_lifetime, 212 in->tlsext_tick_lifetime_hint); 213 } 214#endif /* OPENSSL_NO_TLSEXT */ 215 M_ASN1_I2D_len(&(a.version), i2d_ASN1_INTEGER); 216 M_ASN1_I2D_len(&(a.ssl_version), i2d_ASN1_INTEGER); 217 M_ASN1_I2D_len(&(a.cipher), i2d_ASN1_OCTET_STRING); 218 M_ASN1_I2D_len(&(a.session_id), i2d_ASN1_OCTET_STRING); 219 M_ASN1_I2D_len(&(a.master_key), i2d_ASN1_OCTET_STRING); 220#ifndef OPENSSL_NO_KRB5 221 if (in->krb5_client_princ_len) 222 M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING); 223#endif /* OPENSSL_NO_KRB5 */ 224 if (in->key_arg_length > 0) 225 M_ASN1_I2D_len_IMP_opt(&(a.key_arg), i2d_ASN1_OCTET_STRING); 226 if (in->time != 0L) 227 M_ASN1_I2D_len_EXP_opt(&(a.time), i2d_ASN1_INTEGER, 1, v1); 228 if (in->timeout != 0L) 229 M_ASN1_I2D_len_EXP_opt(&(a.timeout), i2d_ASN1_INTEGER, 2, v2); 230 if (in->peer != NULL) 231 M_ASN1_I2D_len_EXP_opt(in->peer, i2d_X509, 3, v3); 232 M_ASN1_I2D_len_EXP_opt(&a.session_id_context, i2d_ASN1_OCTET_STRING, 4, 233 v4); 234 if (in->verify_result != X509_V_OK) 235 M_ASN1_I2D_len_EXP_opt(&(a.verify_result), i2d_ASN1_INTEGER, 5, v5); 236 237#ifndef OPENSSL_NO_TLSEXT 238 if (in->tlsext_tick_lifetime_hint > 0) 239 M_ASN1_I2D_len_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER, 9, 240 v9); 241 if (in->tlsext_tick) 242 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING, 10, 243 v10); 244 if (in->tlsext_hostname) 245 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING, 6, 246 v6); 247# ifndef OPENSSL_NO_COMP 248 if (in->compress_meth) 249 M_ASN1_I2D_len_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING, 11, v11); 250# endif 251#endif /* OPENSSL_NO_TLSEXT */ 252 M_ASN1_I2D_seq_total(); 253 254 M_ASN1_I2D_put(&(a.version), i2d_ASN1_INTEGER); 255 M_ASN1_I2D_put(&(a.ssl_version), i2d_ASN1_INTEGER); 256 M_ASN1_I2D_put(&(a.cipher), i2d_ASN1_OCTET_STRING); 257 M_ASN1_I2D_put(&(a.session_id), i2d_ASN1_OCTET_STRING); 258 M_ASN1_I2D_put(&(a.master_key), i2d_ASN1_OCTET_STRING); 259#ifndef OPENSSL_NO_KRB5 260 if (in->krb5_client_princ_len) 261 M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING); 262#endif /* OPENSSL_NO_KRB5 */ 263 if (in->key_arg_length > 0) 264 M_ASN1_I2D_put_IMP_opt(&(a.key_arg), i2d_ASN1_OCTET_STRING, 0); 265 if (in->time != 0L) 266 M_ASN1_I2D_put_EXP_opt(&(a.time), i2d_ASN1_INTEGER, 1, v1); 267 if (in->timeout != 0L) 268 M_ASN1_I2D_put_EXP_opt(&(a.timeout), i2d_ASN1_INTEGER, 2, v2); 269 if (in->peer != NULL) 270 M_ASN1_I2D_put_EXP_opt(in->peer, i2d_X509, 3, v3); 271 M_ASN1_I2D_put_EXP_opt(&a.session_id_context, i2d_ASN1_OCTET_STRING, 4, 272 v4); 273 if (in->verify_result != X509_V_OK) 274 M_ASN1_I2D_put_EXP_opt(&a.verify_result, i2d_ASN1_INTEGER, 5, v5); 275#ifndef OPENSSL_NO_TLSEXT 276 if (in->tlsext_hostname) 277 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING, 6, 278 v6); 279 if (in->tlsext_tick_lifetime_hint > 0) 280 M_ASN1_I2D_put_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER, 9, 281 v9); 282 if (in->tlsext_tick) 283 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING, 10, 284 v10); 285#endif /* OPENSSL_NO_TLSEXT */ 286#ifndef OPENSSL_NO_COMP 287 if (in->compress_meth) 288 M_ASN1_I2D_put_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING, 11, v11); 289#endif 290 M_ASN1_I2D_finish(); 291} 292 293SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp, 294 long length) 295{ 296 int ssl_version = 0, i; 297 long id; 298 ASN1_INTEGER ai, *aip; 299 ASN1_OCTET_STRING os, *osp; 300 M_ASN1_D2I_vars(a, SSL_SESSION *, SSL_SESSION_new); 301 302 aip = &ai; 303 osp = &os; 304 305 M_ASN1_D2I_Init(); 306 M_ASN1_D2I_start_sequence(); 307 308 ai.data = NULL; 309 ai.length = 0; 310 M_ASN1_D2I_get_x(ASN1_INTEGER, aip, d2i_ASN1_INTEGER); 311 if (ai.data != NULL) { 312 OPENSSL_free(ai.data); 313 ai.data = NULL; 314 ai.length = 0; 315 } 316 317 /* we don't care about the version right now :-) */ 318 M_ASN1_D2I_get_x(ASN1_INTEGER, aip, d2i_ASN1_INTEGER); 319 ssl_version = (int)ASN1_INTEGER_get(aip); 320 ret->ssl_version = ssl_version; 321 if (ai.data != NULL) { 322 OPENSSL_free(ai.data); 323 ai.data = NULL; 324 ai.length = 0; 325 } 326 327 os.data = NULL; 328 os.length = 0; 329 M_ASN1_D2I_get_x(ASN1_OCTET_STRING, osp, d2i_ASN1_OCTET_STRING); 330 if (ssl_version == SSL2_VERSION) { 331 if (os.length != 3) { 332 c.error = SSL_R_CIPHER_CODE_WRONG_LENGTH; 333 goto err; 334 } 335 id = 0x02000000L | 336 ((unsigned long)os.data[0] << 16L) | 337 ((unsigned long)os.data[1] << 8L) | (unsigned long)os.data[2]; 338 } else if ((ssl_version >> 8) >= SSL3_VERSION_MAJOR) { 339 if (os.length != 2) { 340 c.error = SSL_R_CIPHER_CODE_WRONG_LENGTH; 341 goto err; 342 } 343 id = 0x03000000L | 344 ((unsigned long)os.data[0] << 8L) | (unsigned long)os.data[1]; 345 } else { 346 c.error = SSL_R_UNKNOWN_SSL_VERSION; 347 goto err; 348 } 349 350 ret->cipher = NULL; 351 ret->cipher_id = id; 352 353 M_ASN1_D2I_get_x(ASN1_OCTET_STRING, osp, d2i_ASN1_OCTET_STRING); 354 if ((ssl_version >> 8) >= SSL3_VERSION_MAJOR) 355 i = SSL3_MAX_SSL_SESSION_ID_LENGTH; 356 else /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */ 357 i = SSL2_MAX_SSL_SESSION_ID_LENGTH; 358 359 if (os.length > i) 360 os.length = i; 361 if (os.length > (int)sizeof(ret->session_id)) /* can't happen */ 362 os.length = sizeof(ret->session_id); 363 364 ret->session_id_length = os.length; 365 OPENSSL_assert(os.length <= (int)sizeof(ret->session_id)); 366 memcpy(ret->session_id, os.data, os.length); 367 368 M_ASN1_D2I_get_x(ASN1_OCTET_STRING, osp, d2i_ASN1_OCTET_STRING); 369 if (os.length > SSL_MAX_MASTER_KEY_LENGTH) 370 ret->master_key_length = SSL_MAX_MASTER_KEY_LENGTH; 371 else 372 ret->master_key_length = os.length; 373 memcpy(ret->master_key, os.data, ret->master_key_length); 374 375 os.length = 0; 376 377#ifndef OPENSSL_NO_KRB5 378 os.length = 0; 379 M_ASN1_D2I_get_opt(osp, d2i_ASN1_OCTET_STRING, V_ASN1_OCTET_STRING); 380 if (os.data) { 381 if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH) 382 ret->krb5_client_princ_len = 0; 383 else 384 ret->krb5_client_princ_len = os.length; 385 memcpy(ret->krb5_client_princ, os.data, ret->krb5_client_princ_len); 386 OPENSSL_free(os.data); 387 os.data = NULL; 388 os.length = 0; 389 } else 390 ret->krb5_client_princ_len = 0; 391#endif /* OPENSSL_NO_KRB5 */ 392 393 M_ASN1_D2I_get_IMP_opt(osp, d2i_ASN1_OCTET_STRING, 0, 394 V_ASN1_OCTET_STRING); 395 if (os.length > SSL_MAX_KEY_ARG_LENGTH) 396 ret->key_arg_length = SSL_MAX_KEY_ARG_LENGTH; 397 else 398 ret->key_arg_length = os.length; 399 memcpy(ret->key_arg, os.data, ret->key_arg_length); 400 if (os.data != NULL) 401 OPENSSL_free(os.data); 402 403 ai.length = 0; 404 M_ASN1_D2I_get_EXP_opt(aip, d2i_ASN1_INTEGER, 1); 405 if (ai.data != NULL) { 406 ret->time = ASN1_INTEGER_get(aip); 407 OPENSSL_free(ai.data); 408 ai.data = NULL; 409 ai.length = 0; 410 } else 411 ret->time = (unsigned long)time(NULL); 412 413 ai.length = 0; 414 M_ASN1_D2I_get_EXP_opt(aip, d2i_ASN1_INTEGER, 2); 415 if (ai.data != NULL) { 416 ret->timeout = ASN1_INTEGER_get(aip); 417 OPENSSL_free(ai.data); 418 ai.data = NULL; 419 ai.length = 0; 420 } else 421 ret->timeout = 3; 422 423 if (ret->peer != NULL) { 424 X509_free(ret->peer); 425 ret->peer = NULL; 426 } 427 M_ASN1_D2I_get_EXP_opt(ret->peer, d2i_X509, 3); 428 429 os.length = 0; 430 os.data = NULL; 431 M_ASN1_D2I_get_EXP_opt(osp, d2i_ASN1_OCTET_STRING, 4); 432 433 if (os.data != NULL) { 434 if (os.length > SSL_MAX_SID_CTX_LENGTH) { 435 c.error = SSL_R_BAD_LENGTH; 436 goto err; 437 } else { 438 ret->sid_ctx_length = os.length; 439 memcpy(ret->sid_ctx, os.data, os.length); 440 } 441 OPENSSL_free(os.data); 442 os.data = NULL; 443 os.length = 0; 444 } else 445 ret->sid_ctx_length = 0; 446 447 ai.length = 0; 448 M_ASN1_D2I_get_EXP_opt(aip, d2i_ASN1_INTEGER, 5); 449 if (ai.data != NULL) { 450 ret->verify_result = ASN1_INTEGER_get(aip); 451 OPENSSL_free(ai.data); 452 ai.data = NULL; 453 ai.length = 0; 454 } else 455 ret->verify_result = X509_V_OK; 456 457#ifndef OPENSSL_NO_TLSEXT 458 os.length = 0; 459 os.data = NULL; 460 M_ASN1_D2I_get_EXP_opt(osp, d2i_ASN1_OCTET_STRING, 6); 461 if (os.data) { 462 ret->tlsext_hostname = BUF_strndup((char *)os.data, os.length); 463 OPENSSL_free(os.data); 464 os.data = NULL; 465 os.length = 0; 466 } else 467 ret->tlsext_hostname = NULL; 468 ai.length = 0; 469 M_ASN1_D2I_get_EXP_opt(aip, d2i_ASN1_INTEGER, 9); 470 if (ai.data != NULL) { 471 ret->tlsext_tick_lifetime_hint = ASN1_INTEGER_get(aip); 472 OPENSSL_free(ai.data); 473 ai.data = NULL; 474 ai.length = 0; 475 } else if (ret->tlsext_ticklen && ret->session_id_length) 476 ret->tlsext_tick_lifetime_hint = -1; 477 else 478 ret->tlsext_tick_lifetime_hint = 0; 479 os.length = 0; 480 os.data = NULL; 481 M_ASN1_D2I_get_EXP_opt(osp, d2i_ASN1_OCTET_STRING, 10); 482 if (os.data) { 483 ret->tlsext_tick = os.data; 484 ret->tlsext_ticklen = os.length; 485 os.data = NULL; 486 os.length = 0; 487 } else 488 ret->tlsext_tick = NULL; 489#endif /* OPENSSL_NO_TLSEXT */ 490#ifndef OPENSSL_NO_COMP 491 os.length = 0; 492 os.data = NULL; 493 M_ASN1_D2I_get_EXP_opt(osp, d2i_ASN1_OCTET_STRING, 11); 494 if (os.data) { 495 ret->compress_meth = os.data[0]; 496 OPENSSL_free(os.data); 497 os.data = NULL; 498 } 499#endif 500 501 M_ASN1_D2I_Finish(a, SSL_SESSION_free, SSL_F_D2I_SSL_SESSION); 502} 503