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