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