crypto/external/bsd/openssl/dist/ssl/s2_lib.c

   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
 119 const 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) */
 124 OPENSSL_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
 296 long ssl2_default_timeout(void)
 297 {
 298     return (300);
 299 }
 300
 301 int ssl2_num_ciphers(void)
 302 {
 303     return (SSL2_NUM_CIPHERS);
 304 }
 305
 306 const 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
 314 int ssl2_pending(const SSL *s)
 315 {
 316     return SSL_in_init(s) ? 0 : s->s2->ract_data_length;
 317 }
 318
 319 int ssl2_new(SSL *s)
 320 {
 321     SSL2_STATE *s2;
 322
 323     if ((s2 = OPENSSL_malloc(sizeof *s2)) == NULL)
 324         goto err;
 325     memset(s2, 0, sizeof *s2);
 326
 327 # if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2
 328 #  error "assertion failed"
 329 # endif
 330
 331     if ((s2->rbuf =
 332          OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2)) == NULL)
 333         goto err;
 334     /*
 335      * wbuf needs one byte more because when using two-byte headers, we leave
 336      * the first byte unused in do_ssl_write (s2_pkt.c)
 337      */
 338     if ((s2->wbuf =
 339          OPENSSL_malloc(SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 3)) == NULL)
 340         goto err;
 341     s->s2 = s2;
 342
 343     ssl2_clear(s);
 344     return (1);
 345  err:
 346     if (s2 != NULL) {
 347         if (s2->wbuf != NULL)
 348             OPENSSL_free(s2->wbuf);
 349         if (s2->rbuf != NULL)
 350             OPENSSL_free(s2->rbuf);
 351         OPENSSL_free(s2);
 352     }
 353     return (0);
 354 }
 355
 356 void ssl2_free(SSL *s)
 357 {
 358     SSL2_STATE *s2;
 359
 360     if (s == NULL)
 361         return;
 362
 363     s2 = s->s2;
 364     if (s2->rbuf != NULL)
 365         OPENSSL_free(s2->rbuf);
 366     if (s2->wbuf != NULL)
 367         OPENSSL_free(s2->wbuf);
 368     OPENSSL_cleanse(s2, sizeof *s2);
 369     OPENSSL_free(s2);
 370     s->s2 = NULL;
 371 }
 372
 373 void ssl2_clear(SSL *s)
 374 {
 375     SSL2_STATE *s2;
 376     unsigned char *rbuf, *wbuf;
 377
 378     s2 = s->s2;
 379
 380     rbuf = s2->rbuf;
 381     wbuf = s2->wbuf;
 382
 383     memset(s2, 0, sizeof *s2);
 384
 385     s2->rbuf = rbuf;
 386     s2->wbuf = wbuf;
 387     s2->clear_text = 1;
 388     s->packet = s2->rbuf;
 389     s->version = SSL2_VERSION;
 390     s->packet_length = 0;
 391 }
 392
 393 long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg)
 394 {
 395     int ret = 0;
 396
 397     switch (cmd) {
 398     case SSL_CTRL_GET_SESSION_REUSED:
 399         ret = s->hit;
 400         break;
 401     case SSL_CTRL_CHECK_PROTO_VERSION:
 402         return ssl3_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, larg, parg);
 403     default:
 404         break;
 405     }
 406     return (ret);
 407 }
 408
 409 long ssl2_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
 410 {
 411     return (0);
 412 }
 413
 414 long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
 415 {
 416     return (0);
 417 }
 418
 419 long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
 420 {
 421     return (0);
 422 }
 423
 424 /*
 425  * This function needs to check if the ciphers required are actually
 426  * available
 427  */
 428 const SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)
 429 {
 430     SSL_CIPHER c;
 431     const SSL_CIPHER *cp;
 432     unsigned long id;
 433
 434     id = 0x02000000L | ((unsigned long)p[0] << 16L) |
 435         ((unsigned long)p[1] << 8L) | (unsigned long)p[2];
 436     c.id = id;
 437     cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS);
 438     if ((cp == NULL) || (cp->valid == 0))
 439         return NULL;
 440     else
 441         return cp;
 442 }
 443
 444 int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
 445 {
 446     long l;
 447
 448     if (p != NULL) {
 449         l = c->id;
 450         if ((l & 0xff000000) != 0x02000000 && l != SSL3_CK_FALLBACK_SCSV)
 451             return (0);
 452         p[0] = ((unsigned char)(l >> 16L)) & 0xFF;
 453         p[1] = ((unsigned char)(l >> 8L)) & 0xFF;
 454         p[2] = ((unsigned char)(l)) & 0xFF;
 455     }
 456     return (3);
 457 }
 458
 459 int ssl2_generate_key_material(SSL *s)
 460 {
 461     unsigned int i;
 462     EVP_MD_CTX ctx;
 463     unsigned char *km;
 464     unsigned char c = '0';
 465     const EVP_MD *md5;
 466     int md_size;
 467
 468     md5 = EVP_md5();
 469
 470 # ifdef CHARSET_EBCDIC
 471     c = os_toascii['0'];        /* Must be an ASCII '0', not EBCDIC '0', see
 472                                  * SSLv2 docu */
 473 # endif
 474     EVP_MD_CTX_init(&ctx);
 475     km = s->s2->key_material;
 476
 477     if (s->session->master_key_length < 0 ||
 478         s->session->master_key_length > (int)sizeof(s->session->master_key)) {
 479         SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
 480         return 0;
 481     }
 482     md_size = EVP_MD_size(md5);
 483     if (md_size < 0)
 484         return 0;
 485     for (i = 0; i < s->s2->key_material_length; i += md_size) {
 486         if (((km - s->s2->key_material) + md_size) >
 487             (int)sizeof(s->s2->key_material)) {
 488             /*
 489              * EVP_DigestFinal_ex() below would write beyond buffer
 490              */
 491             SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
 492             return 0;
 493         }
 494
 495         EVP_DigestInit_ex(&ctx, md5, NULL);
 496
 497         OPENSSL_assert(s->session->master_key_length >= 0
 498                        && s->session->master_key_length
 499                        <= (int)sizeof(s->session->master_key));
 500         EVP_DigestUpdate(&ctx, s->session->master_key,
 501                          s->session->master_key_length);
 502         EVP_DigestUpdate(&ctx, &c, 1);
 503         c++;
 504         EVP_DigestUpdate(&ctx, s->s2->challenge, s->s2->challenge_length);
 505         EVP_DigestUpdate(&ctx, s->s2->conn_id, s->s2->conn_id_length);
 506         EVP_DigestFinal_ex(&ctx, km, NULL);
 507         km += md_size;
 508     }
 509
 510     EVP_MD_CTX_cleanup(&ctx);
 511     return 1;
 512 }
 513
 514 void ssl2_return_error(SSL *s, int err)
 515 {
 516     if (!s->error) {
 517         s->error = 3;
 518         s->error_code = err;
 519
 520         ssl2_write_error(s);
 521     }
 522 }
 523
 524 void ssl2_write_error(SSL *s)
 525 {
 526     unsigned char buf[3];
 527     int i, error;
 528
 529     buf[0] = SSL2_MT_ERROR;
 530     buf[1] = (s->error_code >> 8) & 0xff;
 531     buf[2] = (s->error_code) & 0xff;
 532
 533 /*      state=s->rwstate;*/
 534
 535     error = s->error;           /* number of bytes left to write */
 536     s->error = 0;
 537     OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf));
 538     i = ssl2_write(s, &(buf[3 - error]), error);
 539
 540 /*      if (i == error) s->rwstate=state; */
 541
 542     if (i < 0)
 543         s->error = error;
 544     else {
 545         s->error = error - i;
 546
 547         if (s->error == 0)
 548             if (s->msg_callback) {
 549                 /* ERROR */
 550                 s->msg_callback(1, s->version, 0, buf, 3, s,
 551                                 s->msg_callback_arg);
 552             }
 553     }
 554 }
 555
 556 int ssl2_shutdown(SSL *s)
 557 {
 558     s->shutdown = (SSL_SENT_SHUTDOWN | SSL_RECEIVED_SHUTDOWN);
 559     return (1);
 560 }
 561 #else                           /* !OPENSSL_NO_SSL2 */
 562
 563 # if PEDANTIC
 564 static void *dummy = &dummy;
 565 # endif
 566
 567 #endif