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