s2_lib.c revision 279264
1/* ssl/s2_lib.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 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111 112#include "ssl_locl.h" 113#ifndef OPENSSL_NO_SSL2 114#include <stdio.h> 115#include <openssl/objects.h> 116#include <openssl/evp.h> 117#include <openssl/md5.h> 118 119const char ssl2_version_str[]="SSLv2" OPENSSL_VERSION_PTEXT; 120 121#define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER)) 122 123/* list of available SSLv2 ciphers (sorted by id) */ 124OPENSSL_GLOBAL const SSL_CIPHER ssl2_ciphers[]={ 125#if 0 126/* NULL_WITH_MD5 v3 */ 127 { 128 1, 129 SSL2_TXT_NULL_WITH_MD5, 130 SSL2_CK_NULL_WITH_MD5, 131 SSL_kRSA, 132 SSL_aRSA, 133 SSL_eNULL, 134 SSL_MD5, 135 SSL_SSLV2, 136 SSL_EXPORT|SSL_EXP40|SSL_STRONG_NONE, 137 0, 138 0, 139 0, 140 }, 141#endif 142 143/* RC4_128_WITH_MD5 */ 144 { 145 1, 146 SSL2_TXT_RC4_128_WITH_MD5, 147 SSL2_CK_RC4_128_WITH_MD5, 148 SSL_kRSA, 149 SSL_aRSA, 150 SSL_RC4, 151 SSL_MD5, 152 SSL_SSLV2, 153 SSL_NOT_EXP|SSL_MEDIUM, 154 0, 155 128, 156 128, 157 }, 158 159/* RC4_128_EXPORT40_WITH_MD5 */ 160 { 161 1, 162 SSL2_TXT_RC4_128_EXPORT40_WITH_MD5, 163 SSL2_CK_RC4_128_EXPORT40_WITH_MD5, 164 SSL_kRSA, 165 SSL_aRSA, 166 SSL_RC4, 167 SSL_MD5, 168 SSL_SSLV2, 169 SSL_EXPORT|SSL_EXP40, 170 SSL2_CF_5_BYTE_ENC, 171 40, 172 128, 173 }, 174 175/* RC2_128_CBC_WITH_MD5 */ 176 { 177 1, 178 SSL2_TXT_RC2_128_CBC_WITH_MD5, 179 SSL2_CK_RC2_128_CBC_WITH_MD5, 180 SSL_kRSA, 181 SSL_aRSA, 182 SSL_RC2, 183 SSL_MD5, 184 SSL_SSLV2, 185 SSL_NOT_EXP|SSL_MEDIUM, 186 0, 187 128, 188 128, 189 }, 190 191/* RC2_128_CBC_EXPORT40_WITH_MD5 */ 192 { 193 1, 194 SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5, 195 SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5, 196 SSL_kRSA, 197 SSL_aRSA, 198 SSL_RC2, 199 SSL_MD5, 200 SSL_SSLV2, 201 SSL_EXPORT|SSL_EXP40, 202 SSL2_CF_5_BYTE_ENC, 203 40, 204 128, 205 }, 206 207#ifndef OPENSSL_NO_IDEA 208/* IDEA_128_CBC_WITH_MD5 */ 209 { 210 1, 211 SSL2_TXT_IDEA_128_CBC_WITH_MD5, 212 SSL2_CK_IDEA_128_CBC_WITH_MD5, 213 SSL_kRSA, 214 SSL_aRSA, 215 SSL_IDEA, 216 SSL_MD5, 217 SSL_SSLV2, 218 SSL_NOT_EXP|SSL_MEDIUM, 219 0, 220 128, 221 128, 222 }, 223#endif 224 225/* DES_64_CBC_WITH_MD5 */ 226 { 227 1, 228 SSL2_TXT_DES_64_CBC_WITH_MD5, 229 SSL2_CK_DES_64_CBC_WITH_MD5, 230 SSL_kRSA, 231 SSL_aRSA, 232 SSL_DES, 233 SSL_MD5, 234 SSL_SSLV2, 235 SSL_NOT_EXP|SSL_LOW, 236 0, 237 56, 238 56, 239 }, 240 241/* DES_192_EDE3_CBC_WITH_MD5 */ 242 { 243 1, 244 SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5, 245 SSL2_CK_DES_192_EDE3_CBC_WITH_MD5, 246 SSL_kRSA, 247 SSL_aRSA, 248 SSL_3DES, 249 SSL_MD5, 250 SSL_SSLV2, 251 SSL_NOT_EXP|SSL_HIGH, 252 0, 253 112, 254 168, 255 }, 256 257#if 0 258/* RC4_64_WITH_MD5 */ 259 { 260 1, 261 SSL2_TXT_RC4_64_WITH_MD5, 262 SSL2_CK_RC4_64_WITH_MD5, 263 SSL_kRSA, 264 SSL_aRSA, 265 SSL_RC4, 266 SSL_MD5, 267 SSL_SSLV2, 268 SSL_NOT_EXP|SSL_LOW, 269 SSL2_CF_8_BYTE_ENC, 270 64, 271 64, 272 }, 273#endif 274 275#if 0 276/* NULL SSLeay (testing) */ 277 { 278 0, 279 SSL2_TXT_NULL, 280 SSL2_CK_NULL, 281 0, 282 0, 283 0, 284 0, 285 SSL_SSLV2, 286 SSL_STRONG_NONE, 287 0, 288 0, 289 0, 290 }, 291#endif 292 293/* end of list :-) */ 294 }; 295 296long ssl2_default_timeout(void) 297 { 298 return(300); 299 } 300 301int ssl2_num_ciphers(void) 302 { 303 return(SSL2_NUM_CIPHERS); 304 } 305 306const SSL_CIPHER *ssl2_get_cipher(unsigned int u) 307 { 308 if (u < SSL2_NUM_CIPHERS) 309 return(&(ssl2_ciphers[SSL2_NUM_CIPHERS-1-u])); 310 else 311 return(NULL); 312 } 313 314int ssl2_pending(const SSL *s) 315 { 316 return SSL_in_init(s) ? 0 : s->s2->ract_data_length; 317 } 318 319int ssl2_new(SSL *s) 320 { 321 SSL2_STATE *s2; 322 323 if ((s2=OPENSSL_malloc(sizeof *s2)) == NULL) goto err; 324 memset(s2,0,sizeof *s2); 325 326#if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2 327# error "assertion failed" 328#endif 329 330 if ((s2->rbuf=OPENSSL_malloc( 331 SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err; 332 /* wbuf needs one byte more because when using two-byte headers, 333 * we leave the first byte unused in do_ssl_write (s2_pkt.c) */ 334 if ((s2->wbuf=OPENSSL_malloc( 335 SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+3)) == NULL) goto err; 336 s->s2=s2; 337 338 ssl2_clear(s); 339 return(1); 340err: 341 if (s2 != NULL) 342 { 343 if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf); 344 if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf); 345 OPENSSL_free(s2); 346 } 347 return(0); 348 } 349 350void ssl2_free(SSL *s) 351 { 352 SSL2_STATE *s2; 353 354 if(s == NULL) 355 return; 356 357 s2=s->s2; 358 if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf); 359 if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf); 360 OPENSSL_cleanse(s2,sizeof *s2); 361 OPENSSL_free(s2); 362 s->s2=NULL; 363 } 364 365void ssl2_clear(SSL *s) 366 { 367 SSL2_STATE *s2; 368 unsigned char *rbuf,*wbuf; 369 370 s2=s->s2; 371 372 rbuf=s2->rbuf; 373 wbuf=s2->wbuf; 374 375 memset(s2,0,sizeof *s2); 376 377 s2->rbuf=rbuf; 378 s2->wbuf=wbuf; 379 s2->clear_text=1; 380 s->packet=s2->rbuf; 381 s->version=SSL2_VERSION; 382 s->packet_length=0; 383 } 384 385long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg) 386 { 387 int ret=0; 388 389 switch(cmd) 390 { 391 case SSL_CTRL_GET_SESSION_REUSED: 392 ret=s->hit; 393 break; 394 case SSL_CTRL_CHECK_PROTO_VERSION: 395 return ssl3_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, larg, parg); 396 default: 397 break; 398 } 399 return(ret); 400 } 401 402long ssl2_callback_ctrl(SSL *s, int cmd, void (*fp)(void)) 403 { 404 return(0); 405 } 406 407long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) 408 { 409 return(0); 410 } 411 412long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void)) 413 { 414 return(0); 415 } 416 417/* This function needs to check if the ciphers required are actually 418 * available */ 419const SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p) 420 { 421 SSL_CIPHER c; 422 const SSL_CIPHER *cp; 423 unsigned long id; 424 425 id=0x02000000L|((unsigned long)p[0]<<16L)| 426 ((unsigned long)p[1]<<8L)|(unsigned long)p[2]; 427 c.id=id; 428 cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS); 429 if ((cp == NULL) || (cp->valid == 0)) 430 return NULL; 431 else 432 return cp; 433 } 434 435int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p) 436 { 437 long l; 438 439 if (p != NULL) 440 { 441 l=c->id; 442 if ((l & 0xff000000) != 0x02000000 && l != SSL3_CK_FALLBACK_SCSV) return(0); 443 p[0]=((unsigned char)(l>>16L))&0xFF; 444 p[1]=((unsigned char)(l>> 8L))&0xFF; 445 p[2]=((unsigned char)(l ))&0xFF; 446 } 447 return(3); 448 } 449 450int ssl2_generate_key_material(SSL *s) 451 { 452 unsigned int i; 453 EVP_MD_CTX ctx; 454 unsigned char *km; 455 unsigned char c='0'; 456 const EVP_MD *md5; 457 int md_size; 458 459 md5 = EVP_md5(); 460 461#ifdef CHARSET_EBCDIC 462 c = os_toascii['0']; /* Must be an ASCII '0', not EBCDIC '0', 463 see SSLv2 docu */ 464#endif 465 EVP_MD_CTX_init(&ctx); 466 km=s->s2->key_material; 467 468 if (s->session->master_key_length < 0 || 469 s->session->master_key_length > (int)sizeof(s->session->master_key)) 470 { 471 SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR); 472 return 0; 473 } 474 md_size = EVP_MD_size(md5); 475 if (md_size < 0) 476 return 0; 477 for (i=0; i<s->s2->key_material_length; i += md_size) 478 { 479 if (((km - s->s2->key_material) + md_size) > 480 (int)sizeof(s->s2->key_material)) 481 { 482 /* EVP_DigestFinal_ex() below would write beyond buffer */ 483 SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR); 484 return 0; 485 } 486 487 EVP_DigestInit_ex(&ctx, md5, NULL); 488 489 OPENSSL_assert(s->session->master_key_length >= 0 490 && s->session->master_key_length 491 < (int)sizeof(s->session->master_key)); 492 EVP_DigestUpdate(&ctx,s->session->master_key,s->session->master_key_length); 493 EVP_DigestUpdate(&ctx,&c,1); 494 c++; 495 EVP_DigestUpdate(&ctx,s->s2->challenge,s->s2->challenge_length); 496 EVP_DigestUpdate(&ctx,s->s2->conn_id,s->s2->conn_id_length); 497 EVP_DigestFinal_ex(&ctx,km,NULL); 498 km += md_size; 499 } 500 501 EVP_MD_CTX_cleanup(&ctx); 502 return 1; 503 } 504 505void ssl2_return_error(SSL *s, int err) 506 { 507 if (!s->error) 508 { 509 s->error=3; 510 s->error_code=err; 511 512 ssl2_write_error(s); 513 } 514 } 515 516 517void ssl2_write_error(SSL *s) 518 { 519 unsigned char buf[3]; 520 int i,error; 521 522 buf[0]=SSL2_MT_ERROR; 523 buf[1]=(s->error_code>>8)&0xff; 524 buf[2]=(s->error_code)&0xff; 525 526/* state=s->rwstate;*/ 527 528 error=s->error; /* number of bytes left to write */ 529 s->error=0; 530 OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf)); 531 i=ssl2_write(s,&(buf[3-error]),error); 532 533/* if (i == error) s->rwstate=state; */ 534 535 if (i < 0) 536 s->error=error; 537 else 538 { 539 s->error=error-i; 540 541 if (s->error == 0) 542 if (s->msg_callback) 543 s->msg_callback(1, s->version, 0, buf, 3, s, s->msg_callback_arg); /* ERROR */ 544 } 545 } 546 547int ssl2_shutdown(SSL *s) 548 { 549 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN); 550 return(1); 551 } 552#else /* !OPENSSL_NO_SSL2 */ 553 554# if PEDANTIC 555static void *dummy=&dummy; 556# endif 557 558#endif 559