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
 212         if (s->state & SSL_ST_CONNECT)
 213                 {
 214                 sender=s->method->ssl3_enc->server_finished_label;
 215                 slen=s->method->ssl3_enc->server_finished_label_len;
 216                 }
 217         else
 218                 {
 219                 sender=s->method->ssl3_enc->client_finished_label;
 220                 slen=s->method->ssl3_enc->client_finished_label_len;
 221                 }
 222
 223         s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
 224                 sender,slen,s->s3->tmp.peer_finish_md);
 225         }
 226 #endif
 227
 228 int ssl3_get_finished(SSL *s, int a, int b)
 229         {
 230         int al,i,ok;
 231         long n;
 232         unsigned char *p;
 233
 234 #ifdef OPENSSL_NO_NEXTPROTONEG
 235         /* the mac has already been generated when we received the
 236          * change cipher spec message and is in s->s3->tmp.peer_finish_md
 237          */
 238 #endif
 239
 240         n=s->method->ssl_get_message(s,
 241                 a,
 242                 b,
 243                 SSL3_MT_FINISHED,
 244                 64, /* should actually be 36+4 :-) */
 245                 &ok);
 246
 247         if (!ok) return((int)n);
 248
 249         /* If this occurs, we have missed a message */
 250         if (!s->s3->change_cipher_spec)
 251                 {
 252                 al=SSL_AD_UNEXPECTED_MESSAGE;
 253                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
 254                 goto f_err;
 255                 }
 256         s->s3->change_cipher_spec=0;
 257
 258         p = (unsigned char *)s->init_msg;
 259         i = s->s3->tmp.peer_finish_md_len;
 260
 261         if (i != n)
 262                 {
 263                 al=SSL_AD_DECODE_ERROR;
 264                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
 265                 goto f_err;
 266                 }
 267
 268         if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
 269                 {
 270                 al=SSL_AD_DECRYPT_ERROR;
 271                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
 272                 goto f_err;
 273                 }
 274
 275         /* Copy the finished so we can use it for
 276            renegotiation checks */
 277         if(s->type == SSL_ST_ACCEPT)
 278                 {
 279                 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
 280                 memcpy(s->s3->previous_client_finished,
 281                     s->s3->tmp.peer_finish_md, i);
 282                 s->s3->previous_client_finished_len=i;
 283                 }
 284         else
 285                 {
 286                 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
 287                 memcpy(s->s3->previous_server_finished,
 288                     s->s3->tmp.peer_finish_md, i);
 289                 s->s3->previous_server_finished_len=i;
 290                 }
 291
 292         return(1);
 293 f_err:
 294         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 295         return(0);
 296         }
 297
 298 /* for these 2 messages, we need to
 299  * ssl->enc_read_ctx                    re-init
 300  * ssl->s3->read_sequence               zero
 301  * ssl->s3->read_mac_secret             re-init
 302  * ssl->session->read_sym_enc           assign
 303  * ssl->session->read_compression       assign
 304  * ssl->session->read_hash              assign
 305  */
 306 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
 307         {
 308         unsigned char *p;
 309
 310         if (s->state == a)
 311                 {
 312                 p=(unsigned char *)s->init_buf->data;
 313                 *p=SSL3_MT_CCS;
 314                 s->init_num=1;
 315                 s->init_off=0;
 316
 317                 s->state=b;
 318                 }
 319
 320         /* SSL3_ST_CW_CHANGE_B */
 321         return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
 322         }
 323
 324 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
 325         {
 326         int n;
 327         unsigned char *p;
 328
 329         n=i2d_X509(x,NULL);
 330         if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
 331                 {
 332                 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
 333                 return(-1);
 334                 }
 335         p=(unsigned char *)&(buf->data[*l]);
 336         l2n3(n,p);
 337         i2d_X509(x,&p);
 338         *l+=n+3;
 339
 340         return(0);
 341         }
 342
 343 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
 344         {
 345         unsigned char *p;
 346         int i;
 347         unsigned long l=7;
 348         BUF_MEM *buf;
 349         int no_chain;
 350
 351         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
 352                 no_chain = 1;
 353         else
 354                 no_chain = 0;
 355
 356         /* TLSv1 sends a chain with nothing in it, instead of an alert */
 357         buf=s->init_buf;
 358         if (!BUF_MEM_grow_clean(buf,10))
 359                 {
 360                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 361                 return(0);
 362                 }
 363         if (x != NULL)
 364                 {
 365                 if (no_chain)
 366                         {
 367                         if (ssl3_add_cert_to_buf(buf, &l, x))
 368                                 return(0);
 369                         }
 370                 else
 371                         {
 372                         X509_STORE_CTX xs_ctx;
 373
 374                         if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
 375                                 {
 376                                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
 377                                 return(0);
 378                                 }
 379                         X509_verify_cert(&xs_ctx);
 380                         /* Don't leave errors in the queue */
 381                         ERR_clear_error();
 382                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
 383                                 {
 384                                 x = sk_X509_value(xs_ctx.chain, i);
 385
 386                                 if (ssl3_add_cert_to_buf(buf, &l, x))
 387                                         {
 388                                         X509_STORE_CTX_cleanup(&xs_ctx);
 389                                         return 0;
 390                                         }
 391                                 }
 392                         X509_STORE_CTX_cleanup(&xs_ctx);
 393                         }
 394                 }
 395         /* Thawte special :-) */
 396         for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
 397                 {
 398                 x=sk_X509_value(s->ctx->extra_certs,i);
 399                 if (ssl3_add_cert_to_buf(buf, &l, x))
 400                         return(0);
 401                 }
 402
 403         l-=7;
 404         p=(unsigned char *)&(buf->data[4]);
 405         l2n3(l,p);
 406         l+=3;
 407         p=(unsigned char *)&(buf->data[0]);
 408         *(p++)=SSL3_MT_CERTIFICATE;
 409         l2n3(l,p);
 410         l+=4;
 411         return(l);
 412         }
 413
 414 /* Obtain handshake message of message type 'mt' (any if mt == -1),
 415  * maximum acceptable body length 'max'.
 416  * The first four bytes (msg_type and length) are read in state 'st1',
 417  * the body is read in state 'stn'.
 418  */
 419 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
 420         {
 421         unsigned char *p;
 422         unsigned long l;
 423         long n;
 424         int i,al;
 425
 426         if (s->s3->tmp.reuse_message)
 427                 {
 428                 s->s3->tmp.reuse_message=0;
 429                 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
 430                         {
 431                         al=SSL_AD_UNEXPECTED_MESSAGE;
 432                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 433                         goto f_err;
 434                         }
 435                 *ok=1;
 436                 s->init_msg = s->init_buf->data + 4;
 437                 s->init_num = (int)s->s3->tmp.message_size;
 438                 return s->init_num;
 439                 }
 440
 441         p=(unsigned char *)s->init_buf->data;
 442
 443         if (s->state == st1) /* s->init_num < 4 */
 444                 {
 445                 int skip_message;
 446
 447                 do
 448                         {
 449                         while (s->init_num < 4)
 450                                 {
 451                                 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
 452                                         &p[s->init_num],4 - s->init_num, 0);
 453                                 if (i <= 0)
 454                                         {
 455                                         s->rwstate=SSL_READING;
 456                                         *ok = 0;
 457                                         return i;
 458                                         }
 459                                 s->init_num+=i;
 460                                 }
 461
 462                         skip_message = 0;
 463                         if (!s->server)
 464                                 if (p[0] == SSL3_MT_HELLO_REQUEST)
 465                                         /* The server may always send 'Hello Request' messages --
 466                                          * we are doing a handshake anyway now, so ignore them
 467                                          * if their format is correct. Does not count for
 468                                          * 'Finished' MAC. */
 469                                         if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
 470                                                 {
 471                                                 s->init_num = 0;
 472                                                 skip_message = 1;
 473
 474                                                 if (s->msg_callback)
 475                                                         s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
 476                                                 }
 477                         }
 478                 while (skip_message);
 479
 480                 /* s->init_num == 4 */
 481
 482                 if ((mt >= 0) && (*p != mt))
 483                         {
 484                         al=SSL_AD_UNEXPECTED_MESSAGE;
 485                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 486                         goto f_err;
 487                         }
 488                 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
 489                                         (st1 == SSL3_ST_SR_CERT_A) &&
 490                                         (stn == SSL3_ST_SR_CERT_B))
 491                         {
 492                         /* At this point we have got an MS SGC second client
 493                          * hello (maybe we should always allow the client to
 494                          * start a new handshake?). We need to restart the mac.
 495                          * Don't increment {num,total}_renegotiations because
 496                          * we have not completed the handshake. */
 497                         ssl3_init_finished_mac(s);
 498                         }
 499
 500                 s->s3->tmp.message_type= *(p++);
 501
 502                 n2l3(p,l);
 503                 if (l > (unsigned long)max)
 504                         {
 505                         al=SSL_AD_ILLEGAL_PARAMETER;
 506                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 507                         goto f_err;
 508                         }
 509                 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
 510                         {
 511                         al=SSL_AD_ILLEGAL_PARAMETER;
 512                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 513                         goto f_err;
 514                         }
 515                 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
 516                         {
 517                         SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
 518                         goto err;
 519                         }
 520                 s->s3->tmp.message_size=l;
 521                 s->state=stn;
 522
 523                 s->init_msg = s->init_buf->data + 4;
 524                 s->init_num = 0;
 525                 }
 526
 527         /* next state (stn) */
 528         p = s->init_msg;
 529         n = s->s3->tmp.message_size - s->init_num;
 530         while (n > 0)
 531                 {
 532                 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
 533                 if (i <= 0)
 534                         {
 535                         s->rwstate=SSL_READING;
 536                         *ok = 0;
 537                         return i;
 538                         }
 539                 s->init_num += i;
 540                 n -= i;
 541                 }
 542
 543 #ifndef OPENSSL_NO_NEXTPROTONEG
 544         /* If receiving Finished, record MAC of prior handshake messages for
 545          * Finished verification. */
 546         if (*s->init_buf->data == SSL3_MT_FINISHED)
 547                 ssl3_take_mac(s);
 548 #endif
 549
 550         /* Feed this message into MAC computation. */
 551         ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
 552         if (s->msg_callback)
 553                 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
 554         *ok=1;
 555         return s->init_num;
 556 f_err:
 557         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 558 err:
 559         *ok=0;
 560         return(-1);
 561         }
 562
 563 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
 564         {
 565         EVP_PKEY *pk;
 566         int ret= -1,i;
 567
 568         if (pkey == NULL)
 569                 pk=X509_get_pubkey(x);
 570         else
 571                 pk=pkey;
 572         if (pk == NULL) goto err;
 573
 574         i=pk->type;
 575         if (i == EVP_PKEY_RSA)
 576                 {
 577                 ret=SSL_PKEY_RSA_ENC;
 578                 }
 579         else if (i == EVP_PKEY_DSA)
 580                 {
 581                 ret=SSL_PKEY_DSA_SIGN;
 582                 }
 583 #ifndef OPENSSL_NO_EC
 584         else if (i == EVP_PKEY_EC)
 585                 {
 586                 ret = SSL_PKEY_ECC;
 587                 }
 588 #endif
 589         else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc)
 590                 {
 591                 ret = SSL_PKEY_GOST94;
 592                 }
 593         else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc)
 594                 {
 595                 ret = SSL_PKEY_GOST01;
 596                 }
 597         else if (x && i == EVP_PKEY_DH)
 598                 {
 599                 /* For DH two cases: DH certificate signed with RSA and
 600                  * DH certificate signed with DSA.
 601                  */
 602                 i = X509_certificate_type(x, pk);
 603                 if (i & EVP_PKS_RSA)
 604                         ret = SSL_PKEY_DH_RSA;
 605                 else if (i & EVP_PKS_DSA)
 606                         ret = SSL_PKEY_DH_DSA;
 607                 }
 608
 609 err:
 610         if(!pkey) EVP_PKEY_free(pk);
 611         return(ret);
 612         }
 613
 614 int ssl_verify_alarm_type(long type)
 615         {
 616         int al;
 617
 618         switch(type)
 619                 {
 620         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 621         case X509_V_ERR_UNABLE_TO_GET_CRL:
 622         case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
 623                 al=SSL_AD_UNKNOWN_CA;
 624                 break;
 625         case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
 626         case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
 627         case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
 628         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 629         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 630         case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
 631         case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
 632         case X509_V_ERR_CERT_NOT_YET_VALID:
 633         case X509_V_ERR_CRL_NOT_YET_VALID:
 634         case X509_V_ERR_CERT_UNTRUSTED:
 635         case X509_V_ERR_CERT_REJECTED:
 636                 al=SSL_AD_BAD_CERTIFICATE;
 637                 break;
 638         case X509_V_ERR_CERT_SIGNATURE_FAILURE:
 639         case X509_V_ERR_CRL_SIGNATURE_FAILURE:
 640                 al=SSL_AD_DECRYPT_ERROR;
 641                 break;
 642         case X509_V_ERR_CERT_HAS_EXPIRED:
 643         case X509_V_ERR_CRL_HAS_EXPIRED:
 644                 al=SSL_AD_CERTIFICATE_EXPIRED;
 645                 break;
 646         case X509_V_ERR_CERT_REVOKED:
 647                 al=SSL_AD_CERTIFICATE_REVOKED;
 648                 break;
 649         case X509_V_ERR_OUT_OF_MEM:
 650                 al=SSL_AD_INTERNAL_ERROR;
 651                 break;
 652         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 653         case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
 654         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
 655         case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
 656         case X509_V_ERR_CERT_CHAIN_TOO_LONG:
 657         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
 658         case X509_V_ERR_INVALID_CA:
 659                 al=SSL_AD_UNKNOWN_CA;
 660                 break;
 661         case X509_V_ERR_APPLICATION_VERIFICATION:
 662                 al=SSL_AD_HANDSHAKE_FAILURE;
 663                 break;
 664         case X509_V_ERR_INVALID_PURPOSE:
 665                 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
 666                 break;
 667         default:
 668                 al=SSL_AD_CERTIFICATE_UNKNOWN;
 669                 break;
 670                 }
 671         return(al);
 672         }
 673
 674 #ifndef OPENSSL_NO_BUF_FREELISTS
 675 /* On some platforms, malloc() performance is bad enough that you can't just
 676  * free() and malloc() buffers all the time, so we need to use freelists from
 677  * unused buffers.  Currently, each freelist holds memory chunks of only a
 678  * given size (list->chunklen); other sized chunks are freed and malloced.
 679  * This doesn't help much if you're using many different SSL option settings
 680  * with a given context.  (The options affecting buffer size are
 681  * max_send_fragment, read buffer vs write buffer,
 682  * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
 683  * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.)  Using a separate freelist for every
 684  * possible size is not an option, since max_send_fragment can take on many
 685  * different values.
 686  *
 687  * If you are on a platform with a slow malloc(), and you're using SSL
 688  * connections with many different settings for these options, and you need to
 689  * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
 690  *    - Link against a faster malloc implementation.
 691  *    - Use a separate SSL_CTX for each option set.
 692  *    - Improve this code.
 693  */
 694 static void *
 695 freelist_extract(SSL_CTX *ctx, int for_read, int sz)
 696         {
 697         SSL3_BUF_FREELIST *list;
 698         SSL3_BUF_FREELIST_ENTRY *ent = NULL;
 699         void *result = NULL;
 700
 701         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 702         list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
 703         if (list != NULL && sz == (int)list->chunklen)
 704                 ent = list->head;
 705         if (ent != NULL)
 706                 {
 707                 list->head = ent->next;
 708                 result = ent;
 709                 if (--list->len == 0)
 710                         list->chunklen = 0;
 711                 }
 712         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 713         if (!result)
 714                 result = OPENSSL_malloc(sz);
 715         return result;
 716 }
 717
 718 static void
 719 freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
 720         {
 721         SSL3_BUF_FREELIST *list;
 722         SSL3_BUF_FREELIST_ENTRY *ent;
 723
 724         CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
 725         list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
 726         if (list != NULL &&
 727             (sz == list->chunklen || list->chunklen == 0) &&
 728             list->len < ctx->freelist_max_len &&
 729             sz >= sizeof(*ent))
 730                 {
 731                 list->chunklen = sz;
 732                 ent = mem;
 733                 ent->next = list->head;
 734                 list->head = ent;
 735                 ++list->len;
 736                 mem = NULL;
 737                 }
 738
 739         CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
 740         if (mem)
 741                 OPENSSL_free(mem);
 742         }
 743 #else
 744 #define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
 745 #define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
 746 #endif
 747
 748 int ssl3_setup_read_buffer(SSL *s)
 749         {
 750         unsigned char *p;
 751         size_t len,align=0,headerlen;
 752
 753         if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 754                 headerlen = DTLS1_RT_HEADER_LENGTH;
 755         else
 756                 headerlen = SSL3_RT_HEADER_LENGTH;
 757
 758 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
 759         align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
 760 #endif
 761
 762         if (s->s3->rbuf.buf == NULL)
 763                 {
 764                 len = SSL3_RT_MAX_PLAIN_LENGTH
 765                         + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
 766                         + headerlen + align;
 767                 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
 768                         {
 769                         s->s3->init_extra = 1;
 770                         len += SSL3_RT_MAX_EXTRA;
 771                         }
 772 #ifndef OPENSSL_NO_COMP
 773                 if (!(s->options & SSL_OP_NO_COMPRESSION))
 774                         len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
 775 #endif
 776                 if ((p=freelist_extract(s->ctx, 1, len)) == NULL)
 777                         goto err;
 778                 s->s3->rbuf.buf = p;
 779                 s->s3->rbuf.len = len;
 780                 }
 781
 782         s->packet= &(s->s3->rbuf.buf[0]);
 783         return 1;
 784
 785 err:
 786         SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE);
 787         return 0;
 788         }
 789
 790 int ssl3_setup_write_buffer(SSL *s)
 791         {
 792         unsigned char *p;
 793         size_t len,align=0,headerlen;
 794
 795         if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 796                 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
 797         else
 798                 headerlen = SSL3_RT_HEADER_LENGTH;
 799
 800 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
 801         align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
 802 #endif
 803
 804         if (s->s3->wbuf.buf == NULL)
 805                 {
 806                 len = s->max_send_fragment
 807                         + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
 808                         + headerlen + align;
 809 #ifndef OPENSSL_NO_COMP
 810                 if (!(s->options & SSL_OP_NO_COMPRESSION))
 811                         len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
 812 #endif
 813                 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
 814                         len += headerlen + align
 815                                 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
 816
 817                 if ((p=freelist_extract(s->ctx, 0, len)) == NULL)
 818                         goto err;
 819                 s->s3->wbuf.buf = p;
 820                 s->s3->wbuf.len = len;
 821                 }
 822
 823         return 1;
 824
 825 err:
 826         SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE);
 827         return 0;
 828         }
 829
 830
 831 int ssl3_setup_buffers(SSL *s)
 832         {
 833         if (!ssl3_setup_read_buffer(s))
 834                 return 0;
 835         if (!ssl3_setup_write_buffer(s))
 836                 return 0;
 837         return 1;
 838         }
 839
 840 int ssl3_release_write_buffer(SSL *s)
 841         {
 842         if (s->s3->wbuf.buf != NULL)
 843                 {
 844                 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
 845                 s->s3->wbuf.buf = NULL;
 846                 }
 847         return 1;
 848         }
 849
 850 int ssl3_release_read_buffer(SSL *s)
 851         {
 852         if (s->s3->rbuf.buf != NULL)
 853                 {
 854                 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
 855                 s->s3->rbuf.buf = NULL;
 856                 }
 857         return 1;
 858         }
 859