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 66 typedef struct ssl_session_asn1_st 67 { 68 ASN1_INTEGER version; 69 ASN1_INTEGER ssl_version; 70 ASN1_OCTET_STRING cipher; 71 ASN1_OCTET_STRING comp_id; 72 ASN1_OCTET_STRING master_key; 73 ASN1_OCTET_STRING session_id; 74 ASN1_OCTET_STRING session_id_context; 75 ASN1_OCTET_STRING key_arg; 76 #ifndef OPENSSL_NO_KRB5 77 ASN1_OCTET_STRING krb5_princ; 78 #endif /* OPENSSL_NO_KRB5 */ 79 ASN1_INTEGER time; 80 ASN1_INTEGER timeout; 81 ASN1_INTEGER verify_result; 82 #ifndef OPENSSL_NO_TLSEXT 83 ASN1_OCTET_STRING tlsext_hostname; 84 ASN1_INTEGER tlsext_tick_lifetime; 85 ASN1_OCTET_STRING tlsext_tick; 86 #endif /* OPENSSL_NO_TLSEXT */ 87 } SSL_SESSION_ASN1; 88 89 int i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp) 90 { 91 #define LSIZE2 (sizeof(long)*2) 92 int v1=0,v2=0,v3=0,v4=0,v5=0; 93 unsigned char buf[4],ibuf1[LSIZE2],ibuf2[LSIZE2]; 94 unsigned char ibuf3[LSIZE2],ibuf4[LSIZE2],ibuf5[LSIZE2]; 95 #ifndef OPENSSL_NO_TLSEXT 96 int v6=0,v9=0,v10=0; 97 unsigned char ibuf6[LSIZE2]; 98 #endif 99 #ifndef OPENSSL_NO_COMP 100 int v11=0; 101 unsigned char cbuf; 102 #endif 103 long l; 104 SSL_SESSION_ASN1 a; 105 M_ASN1_I2D_vars(in); 106 107 if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0))) 108 return(0); 109 110 /* Note that I cheat in the following 2 assignments. I know 111 * that if the ASN1_INTEGER passed to ASN1_INTEGER_set 112 * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed. 113 * This is a bit evil but makes things simple, no dynamic allocation 114 * to clean up :-) */ 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 { 134 a.cipher.length=3; 135 buf[0]=((unsigned char)(l>>16L))&0xff; 136 buf[1]=((unsigned char)(l>> 8L))&0xff; 137 buf[2]=((unsigned char)(l ))&0xff; 138 } 139 else 140 { 141 a.cipher.length=2; 142 buf[0]=((unsigned char)(l>>8L))&0xff; 143 buf[1]=((unsigned char)(l ))&0xff; 144 } 145 146 #ifndef OPENSSL_NO_COMP 147 if (in->compress_meth) 148 { 149 cbuf = (unsigned char)in->compress_meth; 150 a.comp_id.length = 1; 151 a.comp_id.type = V_ASN1_OCTET_STRING; 152 a.comp_id.data = &cbuf; 153 } 154 #endif 155 156 a.master_key.length=in->master_key_length; 157 a.master_key.type=V_ASN1_OCTET_STRING; 158 a.master_key.data=in->master_key; 159 160 a.session_id.length=in->session_id_length; 161 a.session_id.type=V_ASN1_OCTET_STRING; 162 a.session_id.data=in->session_id; 163 164 a.session_id_context.length=in->sid_ctx_length; 165 a.session_id_context.type=V_ASN1_OCTET_STRING; 166 a.session_id_context.data=in->sid_ctx; 167 168 a.key_arg.length=in->key_arg_length; 169 a.key_arg.type=V_ASN1_OCTET_STRING; 170 a.key_arg.data=in->key_arg; 171 172 #ifndef OPENSSL_NO_KRB5 173 if (in->krb5_client_princ_len) 174 { 175 a.krb5_princ.length=in->krb5_client_princ_len; 176 a.krb5_princ.type=V_ASN1_OCTET_STRING; 177 a.krb5_princ.data=in->krb5_client_princ; 178 } 179 #endif /* OPENSSL_NO_KRB5 */ 180 181 if (in->time != 0L) 182 { 183 a.time.length=LSIZE2; 184 a.time.type=V_ASN1_INTEGER; 185 a.time.data=ibuf3; 186 ASN1_INTEGER_set(&(a.time),in->time); 187 } 188 189 if (in->timeout != 0L) 190 { 191 a.timeout.length=LSIZE2; 192 a.timeout.type=V_ASN1_INTEGER; 193 a.timeout.data=ibuf4; 194 ASN1_INTEGER_set(&(a.timeout),in->timeout); 195 } 196 197 if (in->verify_result != X509_V_OK) 198 { 199 a.verify_result.length=LSIZE2; 200 a.verify_result.type=V_ASN1_INTEGER; 201 a.verify_result.data=ibuf5; 202 ASN1_INTEGER_set(&a.verify_result,in->verify_result); 203 } 204 205 #ifndef OPENSSL_NO_TLSEXT 206 if (in->tlsext_hostname) 207 { 208 a.tlsext_hostname.length=strlen(in->tlsext_hostname); 209 a.tlsext_hostname.type=V_ASN1_OCTET_STRING; 210 a.tlsext_hostname.data=(unsigned char *)in->tlsext_hostname; 211 } 212 if (in->tlsext_tick) 213 { 214 a.tlsext_tick.length= in->tlsext_ticklen; 215 a.tlsext_tick.type=V_ASN1_OCTET_STRING; 216 a.tlsext_tick.data=(unsigned char *)in->tlsext_tick; 217 } 218 if (in->tlsext_tick_lifetime_hint > 0) 219 { 220 a.tlsext_tick_lifetime.length=LSIZE2; 221 a.tlsext_tick_lifetime.type=V_ASN1_INTEGER; 222 a.tlsext_tick_lifetime.data=ibuf6; 223 ASN1_INTEGER_set(&a.tlsext_tick_lifetime,in->tlsext_tick_lifetime_hint); 224 } 225 #endif /* OPENSSL_NO_TLSEXT */ 226 M_ASN1_I2D_len(&(a.version), i2d_ASN1_INTEGER); 227 M_ASN1_I2D_len(&(a.ssl_version), i2d_ASN1_INTEGER); 228 M_ASN1_I2D_len(&(a.cipher), i2d_ASN1_OCTET_STRING); 229 M_ASN1_I2D_len(&(a.session_id), i2d_ASN1_OCTET_STRING); 230 M_ASN1_I2D_len(&(a.master_key), i2d_ASN1_OCTET_STRING); 231 #ifndef OPENSSL_NO_KRB5 232 if (in->krb5_client_princ_len) 233 M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING); 234 #endif /* OPENSSL_NO_KRB5 */ 235 if (in->key_arg_length > 0) 236 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING); 237 if (in->time != 0L) 238 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 239 if (in->timeout != 0L) 240 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 241 if (in->peer != NULL) 242 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3); 243 M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4); 244 if (in->verify_result != X509_V_OK) 245 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5); 246 247 #ifndef OPENSSL_NO_TLSEXT 248 if (in->tlsext_tick_lifetime_hint > 0) 249 M_ASN1_I2D_len_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9); 250 if (in->tlsext_tick) 251 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10); 252 if (in->tlsext_hostname) 253 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6); 254 #ifndef OPENSSL_NO_COMP 255 if (in->compress_meth) 256 M_ASN1_I2D_len_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING,11,v11); 257 #endif 258 #endif /* OPENSSL_NO_TLSEXT */ 259 M_ASN1_I2D_seq_total(); 260 261 M_ASN1_I2D_put(&(a.version), i2d_ASN1_INTEGER); 262 M_ASN1_I2D_put(&(a.ssl_version), i2d_ASN1_INTEGER); 263 M_ASN1_I2D_put(&(a.cipher), i2d_ASN1_OCTET_STRING); 264 M_ASN1_I2D_put(&(a.session_id), i2d_ASN1_OCTET_STRING); 265 M_ASN1_I2D_put(&(a.master_key), i2d_ASN1_OCTET_STRING); 266 #ifndef OPENSSL_NO_KRB5 267 if (in->krb5_client_princ_len) 268 M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING); 269 #endif /* OPENSSL_NO_KRB5 */ 270 if (in->key_arg_length > 0) 271 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0); 272 if (in->time != 0L) 273 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 274 if (in->timeout != 0L) 275 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 276 if (in->peer != NULL) 277 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3); 278 M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4, 279 v4); 280 if (in->verify_result != X509_V_OK) 281 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5); 282 #ifndef OPENSSL_NO_TLSEXT 283 if (in->tlsext_hostname) 284 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6); 285 if (in->tlsext_tick_lifetime_hint > 0) 286 M_ASN1_I2D_put_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9); 287 if (in->tlsext_tick) 288 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10); 289 #endif /* OPENSSL_NO_TLSEXT */ 290 #ifndef OPENSSL_NO_COMP 291 if (in->compress_meth) 292 M_ASN1_I2D_put_EXP_opt(&(a.comp_id), i2d_ASN1_OCTET_STRING,11,v11); 293 #endif 294 M_ASN1_I2D_finish(); 295 } 296 297 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp, 298 long length) 299 { 300 int version,ssl_version=0,i; 301 long id; 302 ASN1_INTEGER ai,*aip; 303 ASN1_OCTET_STRING os,*osp; 304 M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new); 305 306 aip= &ai; 307 osp= &os; 308 309 M_ASN1_D2I_Init(); 310 M_ASN1_D2I_start_sequence(); 311 312 ai.data=NULL; ai.length=0; 313 M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER); 314 version=(int)ASN1_INTEGER_get(aip); 315 if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; } 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) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; } 322 323 os.data=NULL; os.length=0; 324 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING); 325 if (ssl_version == SSL2_VERSION) 326 { 327 if (os.length != 3) 328 { 329 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 330 goto err; 331 } 332 id=0x02000000L| 333 ((unsigned long)os.data[0]<<16L)| 334 ((unsigned long)os.data[1]<< 8L)| 335 (unsigned long)os.data[2]; 336 } 337 else if ((ssl_version>>8) >= SSL3_VERSION_MAJOR) 338 { 339 if (os.length != 2) 340 { 341 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 342 goto err; 343 } 344 id=0x03000000L| 345 ((unsigned long)os.data[0]<<8L)| 346 (unsigned long)os.data[1]; 347 } 348 else 349 { 350 c.error=SSL_R_UNKNOWN_SSL_VERSION; 351 goto err; 352 } 353 354 ret->cipher=NULL; 355 ret->cipher_id=id; 356 357 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING); 358 if ((ssl_version>>8) >= SSL3_VERSION_MAJOR) 359 i=SSL3_MAX_SSL_SESSION_ID_LENGTH; 360 else /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */ 361 i=SSL2_MAX_SSL_SESSION_ID_LENGTH; 362 363 if (os.length > i) 364 os.length = i; 365 if (os.length > (int)sizeof(ret->session_id)) /* can't happen */ 366 os.length = sizeof(ret->session_id); 367 368 ret->session_id_length=os.length; 369 OPENSSL_assert(os.length <= (int)sizeof(ret->session_id)); 370 memcpy(ret->session_id,os.data,os.length); 371 372 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING); 373 if (os.length > SSL_MAX_MASTER_KEY_LENGTH) 374 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH; 375 else 376 ret->master_key_length=os.length; 377 memcpy(ret->master_key,os.data,ret->master_key_length); 378 379 os.length=0; 380 381 #ifndef OPENSSL_NO_KRB5 382 os.length=0; 383 M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING); 384 if (os.data) 385 { 386 if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH) 387 ret->krb5_client_princ_len=0; 388 else 389 ret->krb5_client_princ_len=os.length; 390 memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len); 391 OPENSSL_free(os.data); 392 os.data = NULL; 393 os.length = 0; 394 } 395 else 396 ret->krb5_client_princ_len=0; 397 #endif /* OPENSSL_NO_KRB5 */ 398 399 M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING); 400 if (os.length > SSL_MAX_KEY_ARG_LENGTH) 401 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH; 402 else 403 ret->key_arg_length=os.length; 404 memcpy(ret->key_arg,os.data,ret->key_arg_length); 405 if (os.data != NULL) OPENSSL_free(os.data); 406 407 ai.length=0; 408 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1); 409 if (ai.data != NULL) 410 { 411 ret->time=ASN1_INTEGER_get(aip); 412 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 413 } 414 else 415 ret->time=(unsigned long)time(NULL); 416 417 ai.length=0; 418 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2); 419 if (ai.data != NULL) 420 { 421 ret->timeout=ASN1_INTEGER_get(aip); 422 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 423 } 424 else 425 ret->timeout=3; 426 427 if (ret->peer != NULL) 428 { 429 X509_free(ret->peer); 430 ret->peer=NULL; 431 } 432 M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3); 433 434 os.length=0; 435 os.data=NULL; 436 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4); 437 438 if(os.data != NULL) 439 { 440 if (os.length > SSL_MAX_SID_CTX_LENGTH) 441 { 442 c.error=SSL_R_BAD_LENGTH; 443 goto err; 444 } 445 else 446 { 447 ret->sid_ctx_length=os.length; 448 memcpy(ret->sid_ctx,os.data,os.length); 449 } 450 OPENSSL_free(os.data); os.data=NULL; os.length=0; 451 } 452 else 453 ret->sid_ctx_length=0; 454 455 ai.length=0; 456 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5); 457 if (ai.data != NULL) 458 { 459 ret->verify_result=ASN1_INTEGER_get(aip); 460 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 461 } 462 else 463 ret->verify_result=X509_V_OK; 464 465 #ifndef OPENSSL_NO_TLSEXT 466 os.length=0; 467 os.data=NULL; 468 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,6); 469 if (os.data) 470 { 471 ret->tlsext_hostname = BUF_strndup((char *)os.data, os.length); 472 OPENSSL_free(os.data); 473 os.data = NULL; 474 os.length = 0; 475 } 476 else 477 ret->tlsext_hostname=NULL; 478 ai.length=0; 479 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,9); 480 if (ai.data != NULL) 481 { 482 ret->tlsext_tick_lifetime_hint=ASN1_INTEGER_get(aip); 483 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 484 } 485 else if (ret->tlsext_ticklen && ret->session_id_length) 486 ret->tlsext_tick_lifetime_hint = -1; 487 else 488 ret->tlsext_tick_lifetime_hint = 0; 489 os.length=0; 490 os.data=NULL; 491 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,10); 492 if (os.data) 493 { 494 ret->tlsext_tick = os.data; 495 ret->tlsext_ticklen = os.length; 496 os.data = NULL; 497 os.length = 0; 498 } 499 else 500 ret->tlsext_tick=NULL; 501 #endif /* OPENSSL_NO_TLSEXT */ 502 #ifndef OPENSSL_NO_COMP 503 os.length=0; 504 os.data=NULL; 505 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,11); 506 if (os.data) 507 { 508 ret->compress_meth = os.data[0]; 509 OPENSSL_free(os.data); 510 os.data = NULL; 511 } 512 #endif 513 514 M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION); 515 } 516