crypto/openssl/ssl/s3_both.c

   1 /* ssl/s3_both.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) 1998-2002 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  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  * ECC cipher suite support in OpenSSL originally developed by
 114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 115  */
 116
 117 #include <limits.h>
 118 #include <string.h>
 119 #include <stdio.h>
 120 #include "ssl_locl.h"
 121 #include <openssl/buffer.h>
 122 #include <openssl/rand.h>
 123 #include <openssl/objects.h>
 124 #include <openssl/evp.h>
 125 #include <openssl/x509.h>
 126
 127 /* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */
 128 int ssl3_do_write(SSL *s, int type)
 129         {
 130         int ret;
 131
 132         ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off],
 133                              s->init_num);
 134         if (ret < 0) return(-1);
 135         if (type == SSL3_RT_HANDSHAKE)
 136                 /* should not be done for 'Hello Request's, but in that case
 137                  * we'll ignore the result anyway */
 138                 ssl3_finish_mac(s,(unsigned char *)&s->init_buf->data[s->init_off],ret);
 139
 140         if (ret == s->init_num)
 141                 {
 142                 if (s->msg_callback)
 143                         s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)(s->init_off + s->init_num), s, s->msg_callback_arg);
 144                 return(1);
 145                 }
 146         s->init_off+=ret;
 147         s->init_num-=ret;
 148         return(0);
 149         }
 150
 151 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
 152         {
 153         unsigned char *p,*d;
 154         int i;
 155         unsigned long l;
 156
 157         if (s->state == a)
 158                 {
 159                 d=(unsigned char *)s->init_buf->data;
 160                 p= &(d[4]);
 161
 162                 i=s->method->ssl3_enc->final_finish_mac(s,
 163                         sender,slen,s->s3->tmp.finish_md);
 164                 s->s3->tmp.finish_md_len = i;
 165                 memcpy(p, s->s3->tmp.finish_md, i);
 166                 p+=i;
 167                 l=i;
 168
 169                 /* Copy the finished so we can use it for
 170                    renegotiation checks */
 171                 if(s->type == SSL_ST_CONNECT)
 172                         {
 173                          OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
 174                          memcpy(s->s3->previous_client_finished,
 175                              s->s3->tmp.finish_md, i);
 176                          s->s3->previous_client_finished_len=i;
 177                         }
 178                 else
 179                         {
 180                         OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
 181                         memcpy(s->s3->previous_server_finished,
 182                             s->s3->tmp.finish_md, i);
 183                         s->s3->previous_server_finished_len=i;
 184                         }
 185
 186 #ifdef OPENSSL_SYS_WIN16
 187                 /* MSVC 1.5 does not clear the top bytes of the word unless
 188                  * I do this.
 189                  */
 190                 l&=0xffff;
 191 #endif
 192
 193                 *(d++)=SSL3_MT_FINISHED;
 194                 l2n3(l,d);
 195                 s->init_num=(int)l+4;
 196                 s->init_off=0;
 197
 198                 s->state=b;
 199                 }
 200
 201         /* SSL3_ST_SEND_xxxxxx_HELLO_B */
 202         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 203         }
 204
 205 #ifndef OPENSSL_NO_NEXTPROTONEG
 206 /* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */
 207 static void ssl3_take_mac(SSL *s)
 208         {
 209         const char *sender;
 210         int slen;
 211         /* If no new cipher setup return immediately: other functions will
 212          * set the appropriate error.
 213          */
 214         if (s->s3->tmp.new_cipher == NULL)
 215                 return;
 216         if (s->state & SSL_ST_CONNECT)
 217                 {
 218                 sender=s->method->ssl3_enc->server_finished_label;
 219                 slen=s->method->ssl3_enc->server_finished_label_len;
 220                 }
 221         else
 222                 {
 223                 sender=s->method->ssl3_enc->client_finished_label;
 224                 slen=s->method->ssl3_enc->client_finished_label_len;
 225                 }
 226
 227         s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
 228                 sender,slen,s->s3->tmp.peer_finish_md);
 229         }
 230 #endif
 231
 232 int ssl3_get_finished(SSL *s, int a, int b)
 233         {
 234         int al,i,ok;
 235         long n;
 236         unsigned char *p;
 237
 238 #ifdef OPENSSL_NO_NEXTPROTONEG
 239         /* the mac has already been generated when we received the
 240          * change cipher spec message and is in s->s3->tmp.peer_finish_md.
 241          */
 242 #endif
 243
 244         n=s->method->ssl_get_message(s,
 245                 a,
 246                 b,
 247                 SSL3_MT_FINISHED,
 248                 64, /* should actually be 36+4 :-) */
 249                 &ok);
 250
 251         if (!ok) return((int)n);
 252
 253         /* If this occurs, we have missed a message */
 254         if (!s->s3->change_cipher_spec)
 255                 {
 256                 al=SSL_AD_UNEXPECTED_MESSAGE;
 257                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
 258                 goto f_err;
 259                 }
 260         s->s3->change_cipher_spec=0;
 261
 262         p = (unsigned char *)s->init_msg;
 263         i = s->s3->tmp.peer_finish_md_len;
 264
 265         if (i != n)
 266                 {
 267                 al=SSL_AD_DECODE_ERROR;
 268                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
 269                 goto f_err;
 270                 }
 271
 272         if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
 273                 {
 274                 al=SSL_AD_DECRYPT_ERROR;
 275                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
 276                 goto f_err;
 277                 }
 278
 279         /* Copy the finished so we can use it for
 280            renegotiation checks */
 281         if(s->type == SSL_ST_ACCEPT)
 282                 {
 283                 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
 284                 memcpy(s->s3->previous_client_finished,
 285                     s->s3->tmp.peer_finish_md, i);
 286                 s->s3->previous_client_finished_len=i;
 287                 }
 288         else
 289                 {
 290                 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
 291                 memcpy(s->s3->previous_server_finished,
 292                     s->s3->tmp.peer_finish_md, i);
 293                 s->s3->previous_server_finished_len=i;
 294                 }
 295
 296         return(1);
 297 f_err:
 298         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 299         return(0);
 300         }
 301
 302 /* for these 2 messages, we need to
 303  * ssl->enc_read_ctx                    re-init
 304  * ssl->s3->read_sequence               zero
 305  * ssl->s3->read_mac_secret             re-init
 306  * ssl->session->read_sym_enc           assign
 307  * ssl->session->read_compression       assign
 308  * ssl->session->read_hash              assign
 309  */
 310 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
 311         {
 312         unsigned char *p;
 313
 314         if (s->state == a)
 315                 {
 316                 p=(unsigned char *)s->init_buf->data;
 317                 *p=SSL3_MT_CCS;
 318                 s->init_num=1;
 319                 s->init_off=0;
 320
 321                 s->state=b;
 322                 }
 323
 324         /* SSL3_ST_CW_CHANGE_B */
 325         return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
 326         }
 327
 328 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
 329         {
 330         int n;
 331         unsigned char *p;
 332
 333         n=i2d_X509(x,NULL);
 334         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
 335                 {
 336                 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
 337                 return(-1);
 338                 }
 339         p=(unsigned char *)&(buf->data[*l]);
 340         l2n3(n,p);
 341         i2d_X509(x,&p);
 342         *l+=n+3;
 343
 344         return(0);
 345         }
 346
 347 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
 348         {
 349         unsigned char *p;
 350         int i;
 351         unsigned long l=7;
 352         BUF_MEM *buf;
 353         int no_chain;
 354
 355         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
 356                 no_chain = 1;
 357         else
 358                 no_chain = 0;
 359
 360         /* TLSv1 sends a chain with nothing in it, instead of an alert */
 361         buf=s->init_buf;
 362         if (!BUF_MEM_grow_clean(buf,10))
 363                 {
 364                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 365                 return(0);
 366                 }
 367         if (x != NULL)
 368                 {
 369                 if (no_chain)
 370                         {
 371                         if (ssl3_add_cert_to_buf(buf, &l, x))
 372                                 return(0);
 373                         }
 374                 else
 375                         {
 376                         X509_STORE_CTX xs_ctx;
 377
 378                         if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
 379                                 {
 380                                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
 381                                 return(0);
 382                                 }
 383                         X509_verify_cert(&xs_ctx);
 384                         /* Don't leave errors in the queue */
 385                         ERR_clear_error();
 386                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
 387                                 {
 388                                 x = sk_X509_value(xs_ctx.chain, i);
 389
 390                                 if (ssl3_add_cert_to_buf(buf, &l, x))
 391                                         {
 392                                         X509_STORE_CTX_cleanup(&xs_ctx);
 393                                         return 0;
 394                                         }
 395                                 }
 396                         X509_STORE_CTX_cleanup(&xs_ctx);
 397                         }
 398                 }
 399         /* Thawte special :-) */
 400         for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
 401                 {
 402                 x=sk_X509_value(s->ctx->extra_certs,i);
 403                 if (ssl3_add_cert_to_buf(buf, &l, x))
 404                         return(0);
 405                 }
 406
 407         l-=7;
 408         p=(unsigned char *)&(buf->data[4]);
 409         l2n3(l,p);
 410         l+=3;
 411         p=(unsigned char *)&(buf->data[0]);
 412         *(p++)=SSL3_MT_CERTIFICATE;
 413         l2n3(l,p);
 414         l+=4;
 415         return(l);
 416         }
 417
 418 /* Obtain handshake message of message type 'mt' (any if mt == -1),
 419  * maximum acceptable body length 'max'.
 420  * The first four bytes (msg_type and length) are read in state 'st1',
 421  * the body is read in state 'stn'.
 422  */
 423 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
 424         {
 425         unsigned char *p;
 426         unsigned long l;
 427         long n;
 428         int i,al;
 429
 430         if (s->s3->tmp.reuse_message)
 431                 {
 432                 s->s3->tmp.reuse_message=0;
 433                 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
 434                         {
 435                         al=SSL_AD_UNEXPECTED_MESSAGE;
 436                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 437                         goto f_err;
 438                         }
 439                 *ok=1;
 440                 s->init_msg = s->init_buf->data + 4;
 441                 s->init_num = (int)s->s3->tmp.message_size;
 442                 return s->init_num;
 443                 }
 444
 445         p=(unsigned char *)s->init_buf->data;
 446
 447         if (s->state == st1) /* s->init_num < 4 */
 448                 {
 449                 int skip_message;
 450
 451                 do
 452                         {
 453                         while (s->init_num < 4)
 454                                 {
 455                                 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
 456                                         &p[s->init_num],4 - s->init_num, 0);
 457                                 if (i <= 0)
 458                                         {
 459                                         s->rwstate=SSL_READING;
 460                                         *ok = 0;
 461                                         return i;
 462                                         }
 463                                 s->init_num+=i;
 464                                 }
 465
 466                         skip_message = 0;
 467                         if (!s->server)
 468                                 if (p[0] == SSL3_MT_HELLO_REQUEST)
 469                                         /* The server may always send 'Hello Request' messages --
 470                                          * we are doing a handshake anyway now, so ignore them
 471                                          * if their format is correct. Does not count for
 472                                          * 'Finished' MAC. */
 473                                         if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
 474                                                 {
 475                                                 s->init_num = 0;
 476                                                 skip_message = 1;
 477
 478                                                 if (s->msg_callback)
 479                                                         s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
 480                                                 }
 481                         }
 482                 while (skip_message);
 483
 484                 /* s->init_num == 4 */
 485
 486                 if ((mt >= 0) && (*p != mt))
 487                         {
 488                         al=SSL_AD_UNEXPECTED_MESSAGE;
 489                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 490                         goto f_err;
 491                         }
 492                 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
 493                                         (st1 == SSL3_ST_SR_CERT_A) &&
 494                                         (stn == SSL3_ST_SR_CERT_B))
 495                         {
 496                         /* At this point we have got an MS SGC second client
 497                          * hello (maybe we should always allow the client to
 498                          * start a new handshake?). We need to restart the mac.
 499                          * Don't increment {num,total}_renegotiations because
 500                          * we have not completed the handshake. */
 501                         ssl3_init_finished_mac(s);
 502                         }
 503
 504                 s->s3->tmp.message_type= *(p++);
 505
 506                 n2l3(p,l);
 507                 if (l > (unsigned long)max)
 508                         {
 509                         al=SSL_AD_ILLEGAL_PARAMETER;
 510                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 511                         goto f_err;
 512                         }
 513                 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
 514                         {
 515                         al=SSL_AD_ILLEGAL_PARAMETER;
 516                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 517                         goto f_err;
 518                         }
 519                 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
 520                         {
 521                         SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
 522                         goto err;
 523                         }
 524                 s->s3->tmp.message_size=l;
 525                 s->state=stn;
 526
 527                 s->init_msg = s->init_buf->data + 4;
 528                 s->init_num = 0;
 529                 }
 530
 531         /* next state (stn) */
 532         p = s->init_msg;
 533         n = s->s3->tmp.message_size - s->init_num;
 534         while (n > 0)
 535                 {
 536                 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
 537                 if (i <= 0)
 538                         {
 539                         s->rwstate=SSL_READING;
 540                         *ok = 0;
 541                         return i;
 542                         }
 543                 s->init_num += i;
 544                 n -= i;
 545                 }
 546
 547 #ifndef OPENSSL_NO_NEXTPROTONEG
 548         /* If receiving Finished, record MAC of prior handshake messages for
 549          * Finished verification. */
 550         if (*s->init_buf->data == SSL3_MT_FINISHED)
 551                 ssl3_take_mac(s);
 552 #endif
 553
 554         /* Feed this message into MAC computation. */
 555         ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
 556         if (s->msg_callback)
 557                 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
 558         *ok=1;
 559         return s->init_num;
 560 f_err:
 561         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 562 err:
 563         *ok=0;
 564         return(-1);
 565         }
 566
 567 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
 568         {
 569         EVP_PKEY *pk;
 570         int ret= -1,i;
 571
 572         if (pkey == NULL)
 573                 pk=X509_get_pubkey(x);
 574         else
 575                 pk=pkey;
 576         if (pk == NULL) goto err;
 577
 578         i=pk->type;
 579         if (i == EVP_PKEY_RSA)
 580                 {
 581                 ret=SSL_PKEY_RSA_ENC;
 582                 }
 583         else if (i == EVP_PKEY_DSA)
 584                 {
 585                 ret=SSL_PKEY_DSA_SIGN;
 586                 }
 587 #ifndef OPENSSL_NO_EC
 588         else if (i == EVP_PKEY_EC)
 589                 {
 590                 ret = SSL_PKEY_ECC;
 591                 }
 592 #endif
 593         else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc)
 594                 {
 595                 ret = SSL_PKEY_GOST94;
 596                 }
 597         else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc)
 598                 {
 599                 ret = SSL_PKEY_GOST01;
 600                 }
 601 err:
 602         if(!pkey) EVP_PKEY_free(pk);
 603         return(ret);
 604         }
 605
 606 int ssl_verify_alarm_type(long type)
 607         {
 608         int al;
 609
 610         switch(type)
 611                 {
 612         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 613         case X509_V_ERR_UNABLE_TO_GET_CRL:
 614         case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
 615                 al=SSL_AD_UNKNOWN_CA;
 616                 break;
 617         case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
 618         case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
 619         case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
 620         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 621         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 622         case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
 623         case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
 624         case X509_V_ERR_CERT_NOT_YET_VALID:
 625         case X509_V_ERR_CRL_NOT_YET_VALID:
 626         case X509_V_ERR_CERT_UNTRUSTED:
 627         case X509_V_ERR_CERT_REJECTED:
 628                 al=SSL_AD_BAD_CERTIFICATE;
 629                 break;
 630         case X509_V_ERR_CERT_SIGNATURE_FAILURE:
 631         case X509_V_ERR_CRL_SIGNATURE_FAILURE:
 632                 al=SSL_AD_DECRYPT_ERROR;
 633                 break;
 634         case X509_V_ERR_CERT_HAS_EXPIRED:
 635         case X509_V_ERR_CRL_HAS_EXPIRED:
 636                 al=SSL_AD_CERTIFICATE_EXPIRED;
 637                 break;
 638         case X509_V_ERR_CERT_REVOKED:
 639                 al=SSL_AD_CERTIFICATE_REVOKED;
 640                 break;
 641         case X509_V_ERR_OUT_OF_MEM:
 642                 al=SSL_AD_INTERNAL_ERROR;
 643                 break;
 644         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 645         case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
 646         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
 647         case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
 648         case X509_V_ERR_CERT_CHAIN_TOO_LONG:
 649         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
 650         case X509_V_ERR_INVALID_CA:
 651                 al=SSL_AD_UNKNOWN_CA;
 652                 break;
 653         case X509_V_ERR_APPLICATION_VERIFICATION:
 654                 al=SSL_AD_HANDSHAKE_FAILURE;
 655                 break;
 656         case X509_V_ERR_INVALID_PURPOSE:
 657                 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
 658                 break;
 659         default:
 660                 al=SSL_AD_CERTIFICATE_UNKNOWN;
 661                 break;
 662                 }
 663         return(al);
 664         }
 665
 666 #ifndef OPENSSL_NO_BUF_FREELISTS
 667 /* On some platforms, malloc() performance is bad enough that you can't just
 668  * free() and malloc() buffers all the time, so we need to use freelists from
 669  * unused buffers.  Currently, each freelist holds memory chunks of only a
 670  * given size (list->chunklen); other sized chunks are freed and malloced.
 671  * This doesn't help much if you're using many different SSL option settings
 672  * with a given context.  (The options affecting buffer size are
 673  * max_send_fragment, read buffer vs write buffer,
 674  * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
 675  * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.)  Using a separate freelist for every
 676  * possible size is not an option, since max_send_fragment can take on many
 677  * different values.
 678  *
 679  * If you are on a platform with a slow malloc(), and you're using SSL
 680  * connections with many different settings for these options, and you need to
 681  * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
 682  *    - Link against a faster malloc implementation.
 683  *    - Use a separate SSL_CTX for each option set.
 684  *    - Improve this code.
 685  */
 686 static void *
 687 freelist_extract(SSL_CTX *ctx, int for_read, int sz)
 688         {
 689         SSL3_BUF_FREELIST *list;
 690         SSL3_BUF_FREELIST_ENTRY *ent = NULL;
 691         void *result = NULL;
 692
 693         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 694         list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
 695         if (list != NULL && sz == (int)list->chunklen)
 696                 ent = list->head;
 697         if (ent != NULL)
 698                 {
 699                 list->head = ent->next;
 700                 result = ent;
 701                 if (--list->len == 0)
 702                         list->chunklen = 0;
 703                 }
 704         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 705         if (!result)
 706                 result = OPENSSL_malloc(sz);
 707         return result;
 708 }
 709
 710 static void
 711 freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
 712         {
 713         SSL3_BUF_FREELIST *list;
 714         SSL3_BUF_FREELIST_ENTRY *ent;
 715
 716         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 717         list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
 718         if (list != NULL &&
 719             (sz == list->chunklen || list->chunklen == 0) &&
 720             list->len < ctx->freelist_max_len &&
 721             sz >= sizeof(*ent))
 722                 {
 723                 list->chunklen = sz;
 724                 ent = mem;
 725                 ent->next = list->head;
 726                 list->head = ent;
 727                 ++list->len;
 728                 mem = NULL;
 729                 }
 730
 731         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 732         if (mem)
 733                 OPENSSL_free(mem);
 734         }
 735 #else
 736 #define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
 737 #define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
 738 #endif
 739
 740 int ssl3_setup_read_buffer(SSL *s)
 741         {
 742         unsigned char *p;
 743         size_t len,align=0,headerlen;
 744
 745         if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 746                 headerlen = DTLS1_RT_HEADER_LENGTH;
 747         else
 748                 headerlen = SSL3_RT_HEADER_LENGTH;
 749
 750 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
 751         align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
 752 #endif
 753
 754         if (s->s3->rbuf.buf == NULL)
 755                 {
 756                 len = SSL3_RT_MAX_PLAIN_LENGTH
 757                         + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
 758                         + headerlen + align;
 759                 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
 760                         {
 761                         s->s3->init_extra = 1;
 762                         len += SSL3_RT_MAX_EXTRA;
 763                         }
 764 #ifndef OPENSSL_NO_COMP
 765                 if (!(s->options & SSL_OP_NO_COMPRESSION))
 766                         len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
 767 #endif
 768                 if ((p=freelist_extract(s->ctx, 1, len)) == NULL)
 769                         goto err;
 770                 s->s3->rbuf.buf = p;
 771                 s->s3->rbuf.len = len;
 772                 }
 773
 774         s->packet= &(s->s3->rbuf.buf[0]);
 775         return 1;
 776
 777 err:
 778         SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE);
 779         return 0;
 780         }
 781
 782 int ssl3_setup_write_buffer(SSL *s)
 783         {
 784         unsigned char *p;
 785         size_t len,align=0,headerlen;
 786
 787         if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 788                 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
 789         else
 790                 headerlen = SSL3_RT_HEADER_LENGTH;
 791
 792 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
 793         align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
 794 #endif
 795
 796         if (s->s3->wbuf.buf == NULL)
 797                 {
 798                 len = s->max_send_fragment
 799                         + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
 800                         + headerlen + align;
 801 #ifndef OPENSSL_NO_COMP
 802                 if (!(s->options & SSL_OP_NO_COMPRESSION))
 803                         len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
 804 #endif
 805                 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
 806                         len += headerlen + align
 807                                 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
 808
 809                 if ((p=freelist_extract(s->ctx, 0, len)) == NULL)
 810                         goto err;
 811                 s->s3->wbuf.buf = p;
 812                 s->s3->wbuf.len = len;
 813                 }
 814
 815         return 1;
 816
 817 err:
 818         SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE);
 819         return 0;
 820         }
 821
 822
 823 int ssl3_setup_buffers(SSL *s)
 824         {
 825         if (!ssl3_setup_read_buffer(s))
 826                 return 0;
 827         if (!ssl3_setup_write_buffer(s))
 828                 return 0;
 829         return 1;
 830         }
 831
 832 int ssl3_release_write_buffer(SSL *s)
 833         {
 834         if (s->s3->wbuf.buf != NULL)
 835                 {
 836                 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
 837                 s->s3->wbuf.buf = NULL;
 838                 }
 839         return 1;
 840         }
 841
 842 int ssl3_release_read_buffer(SSL *s)
 843         {
 844         if (s->s3->rbuf.buf != NULL)
 845                 {
 846                 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
 847                 s->s3->rbuf.buf = NULL;
 848                 }
 849         return 1;
 850         }
 851