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 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 88 int 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 long l; 99 SSL_SESSION_ASN1 a; 100 M_ASN1_I2D_vars(in); 101 102 if ((in == NULL) || ((in->cipher == NULL) && (in->cipher_id == 0))) 103 return(0); 104 105 /* Note that I cheat in the following 2 assignments. I know 106 * that if the ASN1_INTEGER passed to ASN1_INTEGER_set 107 * is > sizeof(long)+1, the buffer will not be re-OPENSSL_malloc()ed. 108 * This is a bit evil but makes things simple, no dynamic allocation 109 * to clean up :-) */ 110 a.version.length=LSIZE2; 111 a.version.type=V_ASN1_INTEGER; 112 a.version.data=ibuf1; 113 ASN1_INTEGER_set(&(a.version),SSL_SESSION_ASN1_VERSION); 114 115 a.ssl_version.length=LSIZE2; 116 a.ssl_version.type=V_ASN1_INTEGER; 117 a.ssl_version.data=ibuf2; 118 ASN1_INTEGER_set(&(a.ssl_version),in->ssl_version); 119 120 a.cipher.type=V_ASN1_OCTET_STRING; 121 a.cipher.data=buf; 122 123 if (in->cipher == NULL) 124 l=in->cipher_id; 125 else 126 l=in->cipher->id; 127 if (in->ssl_version == SSL2_VERSION) 128 { 129 a.cipher.length=3; 130 buf[0]=((unsigned char)(l>>16L))&0xff; 131 buf[1]=((unsigned char)(l>> 8L))&0xff; 132 buf[2]=((unsigned char)(l ))&0xff; 133 } 134 else 135 { 136 a.cipher.length=2; 137 buf[0]=((unsigned char)(l>>8L))&0xff; 138 buf[1]=((unsigned char)(l ))&0xff; 139 } 140 141 a.master_key.length=in->master_key_length; 142 a.master_key.type=V_ASN1_OCTET_STRING; 143 a.master_key.data=in->master_key; 144 145 a.session_id.length=in->session_id_length; 146 a.session_id.type=V_ASN1_OCTET_STRING; 147 a.session_id.data=in->session_id; 148 149 a.session_id_context.length=in->sid_ctx_length; 150 a.session_id_context.type=V_ASN1_OCTET_STRING; 151 a.session_id_context.data=in->sid_ctx; 152 153 a.key_arg.length=in->key_arg_length; 154 a.key_arg.type=V_ASN1_OCTET_STRING; 155 a.key_arg.data=in->key_arg; 156 157 #ifndef OPENSSL_NO_KRB5 158 if (in->krb5_client_princ_len) 159 { 160 a.krb5_princ.length=in->krb5_client_princ_len; 161 a.krb5_princ.type=V_ASN1_OCTET_STRING; 162 a.krb5_princ.data=in->krb5_client_princ; 163 } 164 #endif /* OPENSSL_NO_KRB5 */ 165 166 if (in->time != 0L) 167 { 168 a.time.length=LSIZE2; 169 a.time.type=V_ASN1_INTEGER; 170 a.time.data=ibuf3; 171 ASN1_INTEGER_set(&(a.time),in->time); 172 } 173 174 if (in->timeout != 0L) 175 { 176 a.timeout.length=LSIZE2; 177 a.timeout.type=V_ASN1_INTEGER; 178 a.timeout.data=ibuf4; 179 ASN1_INTEGER_set(&(a.timeout),in->timeout); 180 } 181 182 if (in->verify_result != X509_V_OK) 183 { 184 a.verify_result.length=LSIZE2; 185 a.verify_result.type=V_ASN1_INTEGER; 186 a.verify_result.data=ibuf5; 187 ASN1_INTEGER_set(&a.verify_result,in->verify_result); 188 } 189 190 #ifndef OPENSSL_NO_TLSEXT 191 if (in->tlsext_hostname) 192 { 193 a.tlsext_hostname.length=strlen(in->tlsext_hostname); 194 a.tlsext_hostname.type=V_ASN1_OCTET_STRING; 195 a.tlsext_hostname.data=(unsigned char *)in->tlsext_hostname; 196 } 197 if (in->tlsext_tick) 198 { 199 a.tlsext_tick.length= in->tlsext_ticklen; 200 a.tlsext_tick.type=V_ASN1_OCTET_STRING; 201 a.tlsext_tick.data=(unsigned char *)in->tlsext_tick; 202 /* If we have a ticket set session ID to empty because 203 * it will be bogus. If liftime hint is -1 treat as a special 204 * case because the session is being used as a container 205 */ 206 if (in->tlsext_ticklen && (in->tlsext_tick_lifetime_hint != -1)) 207 a.session_id.length=0; 208 } 209 if (in->tlsext_tick_lifetime_hint > 0) 210 { 211 a.tlsext_tick_lifetime.length=LSIZE2; 212 a.tlsext_tick_lifetime.type=V_ASN1_INTEGER; 213 a.tlsext_tick_lifetime.data=ibuf6; 214 ASN1_INTEGER_set(&a.tlsext_tick_lifetime,in->tlsext_tick_lifetime_hint); 215 } 216 #endif /* OPENSSL_NO_TLSEXT */ 217 M_ASN1_I2D_len(&(a.version), i2d_ASN1_INTEGER); 218 M_ASN1_I2D_len(&(a.ssl_version), i2d_ASN1_INTEGER); 219 M_ASN1_I2D_len(&(a.cipher), i2d_ASN1_OCTET_STRING); 220 M_ASN1_I2D_len(&(a.session_id), i2d_ASN1_OCTET_STRING); 221 M_ASN1_I2D_len(&(a.master_key), i2d_ASN1_OCTET_STRING); 222 #ifndef OPENSSL_NO_KRB5 223 if (in->krb5_client_princ_len) 224 M_ASN1_I2D_len(&(a.krb5_princ), i2d_ASN1_OCTET_STRING); 225 #endif /* OPENSSL_NO_KRB5 */ 226 if (in->key_arg_length > 0) 227 M_ASN1_I2D_len_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING); 228 if (in->time != 0L) 229 M_ASN1_I2D_len_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 230 if (in->timeout != 0L) 231 M_ASN1_I2D_len_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 232 if (in->peer != NULL) 233 M_ASN1_I2D_len_EXP_opt(in->peer,i2d_X509,3,v3); 234 M_ASN1_I2D_len_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4,v4); 235 if (in->verify_result != X509_V_OK) 236 M_ASN1_I2D_len_EXP_opt(&(a.verify_result),i2d_ASN1_INTEGER,5,v5); 237 238 #ifndef OPENSSL_NO_TLSEXT 239 if (in->tlsext_tick_lifetime_hint > 0) 240 M_ASN1_I2D_len_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9); 241 if (in->tlsext_tick) 242 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10); 243 if (in->tlsext_hostname) 244 M_ASN1_I2D_len_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6); 245 #endif /* OPENSSL_NO_TLSEXT */ 246 M_ASN1_I2D_seq_total(); 247 248 M_ASN1_I2D_put(&(a.version), i2d_ASN1_INTEGER); 249 M_ASN1_I2D_put(&(a.ssl_version), i2d_ASN1_INTEGER); 250 M_ASN1_I2D_put(&(a.cipher), i2d_ASN1_OCTET_STRING); 251 M_ASN1_I2D_put(&(a.session_id), i2d_ASN1_OCTET_STRING); 252 M_ASN1_I2D_put(&(a.master_key), i2d_ASN1_OCTET_STRING); 253 #ifndef OPENSSL_NO_KRB5 254 if (in->krb5_client_princ_len) 255 M_ASN1_I2D_put(&(a.krb5_princ), i2d_ASN1_OCTET_STRING); 256 #endif /* OPENSSL_NO_KRB5 */ 257 if (in->key_arg_length > 0) 258 M_ASN1_I2D_put_IMP_opt(&(a.key_arg),i2d_ASN1_OCTET_STRING,0); 259 if (in->time != 0L) 260 M_ASN1_I2D_put_EXP_opt(&(a.time),i2d_ASN1_INTEGER,1,v1); 261 if (in->timeout != 0L) 262 M_ASN1_I2D_put_EXP_opt(&(a.timeout),i2d_ASN1_INTEGER,2,v2); 263 if (in->peer != NULL) 264 M_ASN1_I2D_put_EXP_opt(in->peer,i2d_X509,3,v3); 265 M_ASN1_I2D_put_EXP_opt(&a.session_id_context,i2d_ASN1_OCTET_STRING,4, 266 v4); 267 if (in->verify_result != X509_V_OK) 268 M_ASN1_I2D_put_EXP_opt(&a.verify_result,i2d_ASN1_INTEGER,5,v5); 269 #ifndef OPENSSL_NO_TLSEXT 270 if (in->tlsext_hostname) 271 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_hostname), i2d_ASN1_OCTET_STRING,6,v6); 272 if (in->tlsext_tick_lifetime_hint > 0) 273 M_ASN1_I2D_put_EXP_opt(&a.tlsext_tick_lifetime, i2d_ASN1_INTEGER,9,v9); 274 if (in->tlsext_tick) 275 M_ASN1_I2D_put_EXP_opt(&(a.tlsext_tick), i2d_ASN1_OCTET_STRING,10,v10); 276 #endif /* OPENSSL_NO_TLSEXT */ 277 M_ASN1_I2D_finish(); 278 } 279 280 SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp, 281 long length) 282 { 283 int version,ssl_version=0,i; 284 long id; 285 ASN1_INTEGER ai,*aip; 286 ASN1_OCTET_STRING os,*osp; 287 M_ASN1_D2I_vars(a,SSL_SESSION *,SSL_SESSION_new); 288 289 aip= &ai; 290 osp= &os; 291 292 M_ASN1_D2I_Init(); 293 M_ASN1_D2I_start_sequence(); 294 295 ai.data=NULL; ai.length=0; 296 M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER); 297 version=(int)ASN1_INTEGER_get(aip); 298 if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; } 299 300 /* we don't care about the version right now :-) */ 301 M_ASN1_D2I_get_x(ASN1_INTEGER,aip,d2i_ASN1_INTEGER); 302 ssl_version=(int)ASN1_INTEGER_get(aip); 303 ret->ssl_version=ssl_version; 304 if (ai.data != NULL) { OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; } 305 306 os.data=NULL; os.length=0; 307 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING); 308 if (ssl_version == SSL2_VERSION) 309 { 310 if (os.length != 3) 311 { 312 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 313 goto err; 314 } 315 id=0x02000000L| 316 ((unsigned long)os.data[0]<<16L)| 317 ((unsigned long)os.data[1]<< 8L)| 318 (unsigned long)os.data[2]; 319 } 320 else if ((ssl_version>>8) == SSL3_VERSION_MAJOR) 321 { 322 if (os.length != 2) 323 { 324 c.error=SSL_R_CIPHER_CODE_WRONG_LENGTH; 325 goto err; 326 } 327 id=0x03000000L| 328 ((unsigned long)os.data[0]<<8L)| 329 (unsigned long)os.data[1]; 330 } 331 else 332 { 333 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_UNKNOWN_SSL_VERSION); 334 return(NULL); 335 } 336 337 ret->cipher=NULL; 338 ret->cipher_id=id; 339 340 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING); 341 if ((ssl_version>>8) == SSL3_VERSION_MAJOR) 342 i=SSL3_MAX_SSL_SESSION_ID_LENGTH; 343 else /* if (ssl_version>>8 == SSL2_VERSION_MAJOR) */ 344 i=SSL2_MAX_SSL_SESSION_ID_LENGTH; 345 346 if (os.length > i) 347 os.length = i; 348 if (os.length > (int)sizeof(ret->session_id)) /* can't happen */ 349 os.length = sizeof(ret->session_id); 350 351 ret->session_id_length=os.length; 352 OPENSSL_assert(os.length <= (int)sizeof(ret->session_id)); 353 memcpy(ret->session_id,os.data,os.length); 354 355 M_ASN1_D2I_get_x(ASN1_OCTET_STRING,osp,d2i_ASN1_OCTET_STRING); 356 if (os.length > SSL_MAX_MASTER_KEY_LENGTH) 357 ret->master_key_length=SSL_MAX_MASTER_KEY_LENGTH; 358 else 359 ret->master_key_length=os.length; 360 memcpy(ret->master_key,os.data,ret->master_key_length); 361 362 os.length=0; 363 364 #ifndef OPENSSL_NO_KRB5 365 os.length=0; 366 M_ASN1_D2I_get_opt(osp,d2i_ASN1_OCTET_STRING,V_ASN1_OCTET_STRING); 367 if (os.data) 368 { 369 if (os.length > SSL_MAX_KRB5_PRINCIPAL_LENGTH) 370 ret->krb5_client_princ_len=0; 371 else 372 ret->krb5_client_princ_len=os.length; 373 memcpy(ret->krb5_client_princ,os.data,ret->krb5_client_princ_len); 374 OPENSSL_free(os.data); 375 os.data = NULL; 376 os.length = 0; 377 } 378 else 379 ret->krb5_client_princ_len=0; 380 #endif /* OPENSSL_NO_KRB5 */ 381 382 M_ASN1_D2I_get_IMP_opt(osp,d2i_ASN1_OCTET_STRING,0,V_ASN1_OCTET_STRING); 383 if (os.length > SSL_MAX_KEY_ARG_LENGTH) 384 ret->key_arg_length=SSL_MAX_KEY_ARG_LENGTH; 385 else 386 ret->key_arg_length=os.length; 387 memcpy(ret->key_arg,os.data,ret->key_arg_length); 388 if (os.data != NULL) OPENSSL_free(os.data); 389 390 ai.length=0; 391 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,1); 392 if (ai.data != NULL) 393 { 394 ret->time=ASN1_INTEGER_get(aip); 395 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 396 } 397 else 398 ret->time=(unsigned long)time(NULL); 399 400 ai.length=0; 401 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,2); 402 if (ai.data != NULL) 403 { 404 ret->timeout=ASN1_INTEGER_get(aip); 405 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 406 } 407 else 408 ret->timeout=3; 409 410 if (ret->peer != NULL) 411 { 412 X509_free(ret->peer); 413 ret->peer=NULL; 414 } 415 M_ASN1_D2I_get_EXP_opt(ret->peer,d2i_X509,3); 416 417 os.length=0; 418 os.data=NULL; 419 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,4); 420 421 if(os.data != NULL) 422 { 423 if (os.length > SSL_MAX_SID_CTX_LENGTH) 424 { 425 ret->sid_ctx_length=os.length; 426 SSLerr(SSL_F_D2I_SSL_SESSION,SSL_R_BAD_LENGTH); 427 } 428 else 429 { 430 ret->sid_ctx_length=os.length; 431 memcpy(ret->sid_ctx,os.data,os.length); 432 } 433 OPENSSL_free(os.data); os.data=NULL; os.length=0; 434 } 435 else 436 ret->sid_ctx_length=0; 437 438 ai.length=0; 439 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,5); 440 if (ai.data != NULL) 441 { 442 ret->verify_result=ASN1_INTEGER_get(aip); 443 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 444 } 445 else 446 ret->verify_result=X509_V_OK; 447 448 #ifndef OPENSSL_NO_TLSEXT 449 os.length=0; 450 os.data=NULL; 451 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,6); 452 if (os.data) 453 { 454 ret->tlsext_hostname = BUF_strndup((char *)os.data, os.length); 455 OPENSSL_free(os.data); 456 os.data = NULL; 457 os.length = 0; 458 } 459 else 460 ret->tlsext_hostname=NULL; 461 ai.length=0; 462 M_ASN1_D2I_get_EXP_opt(aip,d2i_ASN1_INTEGER,9); 463 if (ai.data != NULL) 464 { 465 ret->tlsext_tick_lifetime_hint=ASN1_INTEGER_get(aip); 466 OPENSSL_free(ai.data); ai.data=NULL; ai.length=0; 467 } 468 else if (ret->tlsext_ticklen && ret->session_id_length) 469 ret->tlsext_tick_lifetime_hint = -1; 470 else 471 ret->tlsext_tick_lifetime_hint = 0; 472 os.length=0; 473 os.data=NULL; 474 M_ASN1_D2I_get_EXP_opt(osp,d2i_ASN1_OCTET_STRING,10); 475 if (os.data) 476 { 477 ret->tlsext_tick = os.data; 478 ret->tlsext_ticklen = os.length; 479 os.data = NULL; 480 os.length = 0; 481 #if 0 482 /* There are two ways to detect a resumed ticket sesion. 483 * One is to set a random session ID and then the server 484 * must return a match in ServerHello. This allows the normal 485 * client session ID matching to work. 486 */ 487 if (ret->session_id_length == 0) 488 { 489 ret->session_id_length=SSL3_MAX_SSL_SESSION_ID_LENGTH; 490 RAND_pseudo_bytes(ret->session_id, 491 ret->session_id_length); 492 } 493 #endif 494 } 495 else 496 ret->tlsext_tick=NULL; 497 #endif /* OPENSSL_NO_TLSEXT */ 498 499 M_ASN1_D2I_Finish(a,SSL_SESSION_free,SSL_F_D2I_SSL_SESSION); 500 } 501