s2_lib.c revision 273415
133965Sjdp/* ssl/s2_lib.c */ 233965Sjdp/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 333965Sjdp * All rights reserved. 433965Sjdp * 533965Sjdp * This package is an SSL implementation written 6218822Sdim * by Eric Young (eay@cryptsoft.com). 733965Sjdp * The implementation was written so as to conform with Netscapes SSL. 8218822Sdim * 933965Sjdp * This library is free for commercial and non-commercial use as long as 10218822Sdim * the following conditions are aheared to. The following conditions 1189857Sobrien * apply to all code found in this distribution, be it the RC4, RSA, 12130561Sobrien * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13218822Sdim * included with this distribution is covered by the same copyright terms 14218822Sdim * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15218822Sdim * 16218822Sdim * Copyright remains Eric Young's, and as such any Copyright notices in 1777298Sobrien * the code are not to be removed. 18130561Sobrien * If this package is used in a product, Eric Young should be given attribution 19130561Sobrien * as the author of the parts of the library used. 2033965Sjdp * This can be in the form of a textual message at program startup or 2133965Sjdp * in documentation (online or textual) provided with the package. 2233965Sjdp * 2333965Sjdp * Redistribution and use in source and binary forms, with or without 2433965Sjdp * modification, are permitted provided that the following conditions 2533965Sjdp * 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 "ssl_locl.h" 60#ifndef OPENSSL_NO_SSL2 61#include <stdio.h> 62#include <openssl/objects.h> 63#include <openssl/evp.h> 64#include <openssl/md5.h> 65 66const char ssl2_version_str[]="SSLv2" OPENSSL_VERSION_PTEXT; 67 68#define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER)) 69 70/* list of available SSLv2 ciphers (sorted by id) */ 71OPENSSL_GLOBAL SSL_CIPHER ssl2_ciphers[]={ 72/* NULL_WITH_MD5 v3 */ 73#if 0 74 { 75 1, 76 SSL2_TXT_NULL_WITH_MD5, 77 SSL2_CK_NULL_WITH_MD5, 78 SSL_kRSA|SSL_aRSA|SSL_eNULL|SSL_MD5|SSL_SSLV2, 79 SSL_EXPORT|SSL_EXP40|SSL_STRONG_NONE, 80 0, 81 0, 82 0, 83 SSL_ALL_CIPHERS, 84 SSL_ALL_STRENGTHS, 85 }, 86#endif 87/* RC4_128_WITH_MD5 */ 88 { 89 1, 90 SSL2_TXT_RC4_128_WITH_MD5, 91 SSL2_CK_RC4_128_WITH_MD5, 92 SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_SSLV2, 93 SSL_NOT_EXP|SSL_MEDIUM, 94 0, 95 128, 96 128, 97 SSL_ALL_CIPHERS, 98 SSL_ALL_STRENGTHS, 99 }, 100/* RC4_128_EXPORT40_WITH_MD5 */ 101 { 102 1, 103 SSL2_TXT_RC4_128_EXPORT40_WITH_MD5, 104 SSL2_CK_RC4_128_EXPORT40_WITH_MD5, 105 SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_SSLV2, 106 SSL_EXPORT|SSL_EXP40, 107 SSL2_CF_5_BYTE_ENC, 108 40, 109 128, 110 SSL_ALL_CIPHERS, 111 SSL_ALL_STRENGTHS, 112 }, 113/* RC2_128_CBC_WITH_MD5 */ 114 { 115 1, 116 SSL2_TXT_RC2_128_CBC_WITH_MD5, 117 SSL2_CK_RC2_128_CBC_WITH_MD5, 118 SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_SSLV2, 119 SSL_NOT_EXP|SSL_MEDIUM, 120 0, 121 128, 122 128, 123 SSL_ALL_CIPHERS, 124 SSL_ALL_STRENGTHS, 125 }, 126/* RC2_128_CBC_EXPORT40_WITH_MD5 */ 127 { 128 1, 129 SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5, 130 SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5, 131 SSL_kRSA|SSL_aRSA|SSL_RC2|SSL_MD5|SSL_SSLV2, 132 SSL_EXPORT|SSL_EXP40, 133 SSL2_CF_5_BYTE_ENC, 134 40, 135 128, 136 SSL_ALL_CIPHERS, 137 SSL_ALL_STRENGTHS, 138 }, 139/* IDEA_128_CBC_WITH_MD5 */ 140#ifndef OPENSSL_NO_IDEA 141 { 142 1, 143 SSL2_TXT_IDEA_128_CBC_WITH_MD5, 144 SSL2_CK_IDEA_128_CBC_WITH_MD5, 145 SSL_kRSA|SSL_aRSA|SSL_IDEA|SSL_MD5|SSL_SSLV2, 146 SSL_NOT_EXP|SSL_MEDIUM, 147 0, 148 128, 149 128, 150 SSL_ALL_CIPHERS, 151 SSL_ALL_STRENGTHS, 152 }, 153#endif 154/* DES_64_CBC_WITH_MD5 */ 155 { 156 1, 157 SSL2_TXT_DES_64_CBC_WITH_MD5, 158 SSL2_CK_DES_64_CBC_WITH_MD5, 159 SSL_kRSA|SSL_aRSA|SSL_DES|SSL_MD5|SSL_SSLV2, 160 SSL_NOT_EXP|SSL_LOW, 161 0, 162 56, 163 56, 164 SSL_ALL_CIPHERS, 165 SSL_ALL_STRENGTHS, 166 }, 167/* DES_192_EDE3_CBC_WITH_MD5 */ 168 { 169 1, 170 SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5, 171 SSL2_CK_DES_192_EDE3_CBC_WITH_MD5, 172 SSL_kRSA|SSL_aRSA|SSL_3DES|SSL_MD5|SSL_SSLV2, 173 SSL_NOT_EXP|SSL_HIGH, 174 0, 175 168, 176 168, 177 SSL_ALL_CIPHERS, 178 SSL_ALL_STRENGTHS, 179 }, 180/* RC4_64_WITH_MD5 */ 181#if 0 182 { 183 1, 184 SSL2_TXT_RC4_64_WITH_MD5, 185 SSL2_CK_RC4_64_WITH_MD5, 186 SSL_kRSA|SSL_aRSA|SSL_RC4|SSL_MD5|SSL_SSLV2, 187 SSL_NOT_EXP|SSL_LOW, 188 SSL2_CF_8_BYTE_ENC, 189 64, 190 64, 191 SSL_ALL_CIPHERS, 192 SSL_ALL_STRENGTHS, 193 }, 194#endif 195/* NULL SSLeay (testing) */ 196#if 0 197 { 198 0, 199 SSL2_TXT_NULL, 200 SSL2_CK_NULL, 201 0, 202 SSL_STRONG_NONE, 203 0, 204 0, 205 0, 206 SSL_ALL_CIPHERS, 207 SSL_ALL_STRENGTHS, 208 }, 209#endif 210 211/* end of list :-) */ 212 }; 213 214long ssl2_default_timeout(void) 215 { 216 return(300); 217 } 218 219IMPLEMENT_ssl2_meth_func(sslv2_base_method, 220 ssl_undefined_function, 221 ssl_undefined_function, 222 ssl_bad_method) 223 224int ssl2_num_ciphers(void) 225 { 226 return(SSL2_NUM_CIPHERS); 227 } 228 229SSL_CIPHER *ssl2_get_cipher(unsigned int u) 230 { 231 if (u < SSL2_NUM_CIPHERS) 232 return(&(ssl2_ciphers[SSL2_NUM_CIPHERS-1-u])); 233 else 234 return(NULL); 235 } 236 237int ssl2_pending(const SSL *s) 238 { 239 return SSL_in_init(s) ? 0 : s->s2->ract_data_length; 240 } 241 242int ssl2_new(SSL *s) 243 { 244 SSL2_STATE *s2; 245 246 if ((s2=OPENSSL_malloc(sizeof *s2)) == NULL) goto err; 247 memset(s2,0,sizeof *s2); 248 249#if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2 250# error "assertion failed" 251#endif 252 253 if ((s2->rbuf=OPENSSL_malloc( 254 SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err; 255 /* wbuf needs one byte more because when using two-byte headers, 256 * we leave the first byte unused in do_ssl_write (s2_pkt.c) */ 257 if ((s2->wbuf=OPENSSL_malloc( 258 SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+3)) == NULL) goto err; 259 s->s2=s2; 260 261 ssl2_clear(s); 262 return(1); 263err: 264 if (s2 != NULL) 265 { 266 if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf); 267 if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf); 268 OPENSSL_free(s2); 269 } 270 return(0); 271 } 272 273void ssl2_free(SSL *s) 274 { 275 SSL2_STATE *s2; 276 277 if(s == NULL) 278 return; 279 280 s2=s->s2; 281 if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf); 282 if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf); 283 OPENSSL_cleanse(s2,sizeof *s2); 284 OPENSSL_free(s2); 285 s->s2=NULL; 286 } 287 288void ssl2_clear(SSL *s) 289 { 290 SSL2_STATE *s2; 291 unsigned char *rbuf,*wbuf; 292 293 s2=s->s2; 294 295 rbuf=s2->rbuf; 296 wbuf=s2->wbuf; 297 298 memset(s2,0,sizeof *s2); 299 300 s2->rbuf=rbuf; 301 s2->wbuf=wbuf; 302 s2->clear_text=1; 303 s->packet=s2->rbuf; 304 s->version=SSL2_VERSION; 305 s->packet_length=0; 306 } 307 308long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg) 309 { 310 int ret=0; 311 312 switch(cmd) 313 { 314 case SSL_CTRL_GET_SESSION_REUSED: 315 ret=s->hit; 316 break; 317 case SSL_CTRL_CHECK_PROTO_VERSION: 318 return ssl3_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, larg, parg); 319 default: 320 break; 321 } 322 return(ret); 323 } 324 325long ssl2_callback_ctrl(SSL *s, int cmd, void (*fp)(void)) 326 { 327 return(0); 328 } 329 330long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) 331 { 332 return(0); 333 } 334 335long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void)) 336 { 337 return(0); 338 } 339 340/* This function needs to check if the ciphers required are actually 341 * available */ 342SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p) 343 { 344 SSL_CIPHER c,*cp; 345 unsigned long id; 346 347 id=0x02000000L|((unsigned long)p[0]<<16L)| 348 ((unsigned long)p[1]<<8L)|(unsigned long)p[2]; 349 c.id=id; 350 cp = (SSL_CIPHER *)OBJ_bsearch((char *)&c, 351 (char *)ssl2_ciphers, 352 SSL2_NUM_CIPHERS,sizeof(SSL_CIPHER), 353 FP_ICC ssl_cipher_id_cmp); 354 if ((cp == NULL) || (cp->valid == 0)) 355 return NULL; 356 else 357 return cp; 358 } 359 360int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p) 361 { 362 long l; 363 364 if (p != NULL) 365 { 366 l=c->id; 367 if ((l & 0xff000000) != 0x02000000 && l != SSL3_CK_FALLBACK_SCSV) return(0); 368 p[0]=((unsigned char)(l>>16L))&0xFF; 369 p[1]=((unsigned char)(l>> 8L))&0xFF; 370 p[2]=((unsigned char)(l ))&0xFF; 371 } 372 return(3); 373 } 374 375int ssl2_generate_key_material(SSL *s) 376 { 377 unsigned int i; 378 EVP_MD_CTX ctx; 379 unsigned char *km; 380 unsigned char c='0'; 381 const EVP_MD *md5; 382 383 md5 = EVP_md5(); 384 385#ifdef CHARSET_EBCDIC 386 c = os_toascii['0']; /* Must be an ASCII '0', not EBCDIC '0', 387 see SSLv2 docu */ 388#endif 389 EVP_MD_CTX_init(&ctx); 390 km=s->s2->key_material; 391 392 if (s->session->master_key_length < 0 || 393 s->session->master_key_length > (int)sizeof(s->session->master_key)) 394 { 395 SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR); 396 return 0; 397 } 398 399 for (i=0; i<s->s2->key_material_length; i += EVP_MD_size(md5)) 400 { 401 if (((km - s->s2->key_material) + EVP_MD_size(md5)) > 402 (int)sizeof(s->s2->key_material)) 403 { 404 /* EVP_DigestFinal_ex() below would write beyond buffer */ 405 SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR); 406 return 0; 407 } 408 409 EVP_DigestInit_ex(&ctx, md5, NULL); 410 411 OPENSSL_assert(s->session->master_key_length >= 0 412 && s->session->master_key_length 413 < (int)sizeof(s->session->master_key)); 414 EVP_DigestUpdate(&ctx,s->session->master_key,s->session->master_key_length); 415 EVP_DigestUpdate(&ctx,&c,1); 416 c++; 417 EVP_DigestUpdate(&ctx,s->s2->challenge,s->s2->challenge_length); 418 EVP_DigestUpdate(&ctx,s->s2->conn_id,s->s2->conn_id_length); 419 EVP_DigestFinal_ex(&ctx,km,NULL); 420 km += EVP_MD_size(md5); 421 } 422 423 EVP_MD_CTX_cleanup(&ctx); 424 return 1; 425 } 426 427void ssl2_return_error(SSL *s, int err) 428 { 429 if (!s->error) 430 { 431 s->error=3; 432 s->error_code=err; 433 434 ssl2_write_error(s); 435 } 436 } 437 438 439void ssl2_write_error(SSL *s) 440 { 441 unsigned char buf[3]; 442 int i,error; 443 444 buf[0]=SSL2_MT_ERROR; 445 buf[1]=(s->error_code>>8)&0xff; 446 buf[2]=(s->error_code)&0xff; 447 448/* state=s->rwstate;*/ 449 450 error=s->error; /* number of bytes left to write */ 451 s->error=0; 452 OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf)); 453 i=ssl2_write(s,&(buf[3-error]),error); 454 455/* if (i == error) s->rwstate=state; */ 456 457 if (i < 0) 458 s->error=error; 459 else 460 { 461 s->error=error-i; 462 463 if (s->error == 0) 464 if (s->msg_callback) 465 s->msg_callback(1, s->version, 0, buf, 3, s, s->msg_callback_arg); /* ERROR */ 466 } 467 } 468 469int ssl2_shutdown(SSL *s) 470 { 471 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN); 472 return(1); 473 } 474#else /* !OPENSSL_NO_SSL2 */ 475 476# if PEDANTIC 477static void *dummy=&dummy; 478# endif 479 480#endif 481