ssl/ssl_lib.c

   1 /*! \file ssl/ssl_lib.c
   2  *  \brief Version independent SSL functions.
   3  */
   4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   5  * All rights reserved.
   6  *
   7  * This package is an SSL implementation written
   8  * by Eric Young (eay@cryptsoft.com).
   9  * The implementation was written so as to conform with Netscapes SSL.
  10  *
  11  * This library is free for commercial and non-commercial use as long as
  12  * the following conditions are aheared to.  The following conditions
  13  * apply to all code found in this distribution, be it the RC4, RSA,
  14  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  15  * included with this distribution is covered by the same copyright terms
  16  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  17  *
  18  * Copyright remains Eric Young's, and as such any Copyright notices in
  19  * the code are not to be removed.
  20  * If this package is used in a product, Eric Young should be given attribution
  21  * as the author of the parts of the library used.
  22  * This can be in the form of a textual message at program startup or
  23  * in documentation (online or textual) provided with the package.
  24  *
  25  * Redistribution and use in source and binary forms, with or without
  26  * modification, are permitted provided that the following conditions
  27  * are met:
  28  * 1. Redistributions of source code must retain the copyright
  29  *    notice, this list of conditions and the following disclaimer.
  30  * 2. Redistributions in binary form must reproduce the above copyright
  31  *    notice, this list of conditions and the following disclaimer in the
  32  *    documentation and/or other materials provided with the distribution.
  33  * 3. All advertising materials mentioning features or use of this software
  34  *    must display the following acknowledgement:
  35  *    "This product includes cryptographic software written by
  36  *     Eric Young (eay@cryptsoft.com)"
  37  *    The word 'cryptographic' can be left out if the rouines from the library
  38  *    being used are not cryptographic related :-).
  39  * 4. If you include any Windows specific code (or a derivative thereof) from
  40  *    the apps directory (application code) you must include an acknowledgement:
  41  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  * The licence and distribution terms for any publically available version or
  56  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  57  * copied and put under another distribution licence
  58  * [including the GNU Public Licence.]
  59  */
  60
  61 #include <stdio.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/lhash.h>
  64 #include "ssl_locl.h"
  65
  66 char *SSL_version_str=OPENSSL_VERSION_TEXT;
  67
  68 static STACK *ssl_meth=NULL;
  69 static STACK *ssl_ctx_meth=NULL;
  70 static int ssl_meth_num=0;
  71 static int ssl_ctx_meth_num=0;
  72
  73 SSL3_ENC_METHOD ssl3_undef_enc_method={
  74         ssl_undefined_function,
  75         ssl_undefined_function,
  76         ssl_undefined_function,
  77         ssl_undefined_function,
  78         ssl_undefined_function,
  79         ssl_undefined_function,
  80         };
  81
  82 int SSL_clear(SSL *s)
  83         {
  84         int state;
  85
  86         if (s->method == NULL)
  87                 {
  88                 SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
  89                 return(0);
  90                 }
  91
  92         s->error=0;
  93         s->hit=0;
  94         s->shutdown=0;
  95
  96 #if 0
  97         /* This is set if we are doing dynamic renegotiation so keep
  98          * the old cipher.  It is sort of a SSL_clear_lite :-) */
  99         if (s->new_session) return(1);
 100 #endif
 101
 102         state=s->state; /* Keep to check if we throw away the session-id */
 103         s->type=0;
 104
 105         s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);
 106
 107         s->version=s->method->version;
 108         s->client_version=s->version;
 109         s->rwstate=SSL_NOTHING;
 110         s->rstate=SSL_ST_READ_HEADER;
 111         s->read_ahead=s->ctx->read_ahead;
 112
 113         if (s->init_buf != NULL)
 114                 {
 115                 BUF_MEM_free(s->init_buf);
 116                 s->init_buf=NULL;
 117                 }
 118
 119         ssl_clear_cipher_ctx(s);
 120
 121         if (ssl_clear_bad_session(s))
 122                 {
 123                 SSL_SESSION_free(s->session);
 124                 s->session=NULL;
 125                 }
 126
 127         s->first_packet=0;
 128
 129 #if 1
 130         /* Check to see if we were changed into a different method, if
 131          * so, revert back if we are not doing session-id reuse. */
 132         if ((s->session == NULL) && (s->method != s->ctx->method))
 133                 {
 134                 s->method->ssl_free(s);
 135                 s->method=s->ctx->method;
 136                 if (!s->method->ssl_new(s))
 137                         return(0);
 138                 }
 139         else
 140 #endif
 141                 s->method->ssl_clear(s);
 142         return(1);
 143         }
 144
 145 /** Used to change an SSL_CTXs default SSL method type */
 146 int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)
 147         {
 148         STACK_OF(SSL_CIPHER) *sk;
 149
 150         ctx->method=meth;
 151
 152         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 153                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
 154         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
 155                 {
 156                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 157                 return(0);
 158                 }
 159         return(1);
 160         }
 161
 162 SSL *SSL_new(SSL_CTX *ctx)
 163         {
 164         SSL *s;
 165
 166         if (ctx == NULL)
 167                 {
 168                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 169                 return(NULL);
 170                 }
 171         if (ctx->method == NULL)
 172                 {
 173                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 174                 return(NULL);
 175                 }
 176
 177         s=(SSL *)Malloc(sizeof(SSL));
 178         if (s == NULL) goto err;
 179         memset(s,0,sizeof(SSL));
 180
 181         if (ctx->cert != NULL)
 182                 {
 183                 /* Earlier library versions used to copy the pointer to
 184                  * the CERT, not its contents; only when setting new
 185                  * parameters for the per-SSL copy, ssl_cert_new would be
 186                  * called (and the direct reference to the per-SSL_CTX
 187                  * settings would be lost, but those still were indirectly
 188                  * accessed for various purposes, and for that reason they
 189                  * used to be known as s->ctx->default_cert).
 190                  * Now we don't look at the SSL_CTX's CERT after having
 191                  * duplicated it once. */
 192
 193                 s->cert = ssl_cert_dup(ctx->cert);
 194                 if (s->cert == NULL)
 195                         goto err;
 196                 }
 197         else
 198                 s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */
 199         s->sid_ctx_length=ctx->sid_ctx_length;
 200         memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
 201         s->verify_mode=ctx->verify_mode;
 202         s->verify_depth=ctx->verify_depth;
 203         s->verify_callback=ctx->default_verify_callback;
 204         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 205         s->ctx=ctx;
 206
 207         s->verify_result=X509_V_OK;
 208
 209         s->method=ctx->method;
 210
 211         if (!s->method->ssl_new(s))
 212                 goto err;
 213
 214         s->quiet_shutdown=ctx->quiet_shutdown;
 215         s->references=1;
 216         s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;
 217         s->options=ctx->options;
 218         SSL_clear(s);
 219
 220         CRYPTO_new_ex_data(ssl_meth,(char *)s,&s->ex_data);
 221
 222         return(s);
 223 err:
 224         if (s != NULL)
 225                 {
 226                 if (s->cert != NULL)
 227                         ssl_cert_free(s->cert);
 228                 if (s->ctx != NULL)
 229                         SSL_CTX_free(s->ctx); /* decrement reference count */
 230                 Free(s);
 231                 }
 232         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 233         return(NULL);
 234         }
 235
 236 int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
 237                                    unsigned int sid_ctx_len)
 238     {
 239     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 240         {
 241         SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 242         return 0;
 243         }
 244     ctx->sid_ctx_length=sid_ctx_len;
 245     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);
 246
 247     return 1;
 248     }
 249
 250 int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
 251                                unsigned int sid_ctx_len)
 252     {
 253     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
 254         {
 255         SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
 256         return 0;
 257         }
 258     ssl->sid_ctx_length=sid_ctx_len;
 259     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);
 260
 261     return 1;
 262     }
 263
 264 void SSL_free(SSL *s)
 265         {
 266         int i;
 267
 268         if(s == NULL)
 269             return;
 270
 271         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 272 #ifdef REF_PRINT
 273         REF_PRINT("SSL",s);
 274 #endif
 275         if (i > 0) return;
 276 #ifdef REF_CHECK
 277         if (i < 0)
 278                 {
 279                 fprintf(stderr,"SSL_free, bad reference count\n");
 280                 abort(); /* ok */
 281                 }
 282 #endif
 283
 284         CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);
 285
 286         if (s->bbio != NULL)
 287                 {
 288                 /* If the buffering BIO is in place, pop it off */
 289                 if (s->bbio == s->wbio)
 290                         {
 291                         s->wbio=BIO_pop(s->wbio);
 292                         }
 293                 BIO_free(s->bbio);
 294                 s->bbio=NULL;
 295                 }
 296         if (s->rbio != NULL)
 297                 BIO_free_all(s->rbio);
 298         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 299                 BIO_free_all(s->wbio);
 300
 301         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 302
 303         /* add extra stuff */
 304         if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
 305         if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);
 306
 307         /* Make the next call work :-) */
 308         if (s->session != NULL)
 309                 {
 310                 ssl_clear_bad_session(s);
 311                 SSL_SESSION_free(s->session);
 312                 }
 313
 314         ssl_clear_cipher_ctx(s);
 315
 316         if (s->cert != NULL) ssl_cert_free(s->cert);
 317         /* Free up if allocated */
 318
 319         if (s->ctx) SSL_CTX_free(s->ctx);
 320
 321         if (s->client_CA != NULL)
 322                 sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);
 323
 324         if (s->method != NULL) s->method->ssl_free(s);
 325
 326         Free((char *)s);
 327         }
 328
 329 void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
 330         {
 331         /* If the output buffering BIO is still in place, remove it
 332          */
 333         if (s->bbio != NULL)
 334                 {
 335                 if (s->wbio == s->bbio)
 336                         {
 337                         s->wbio=s->wbio->next_bio;
 338                         s->bbio->next_bio=NULL;
 339                         }
 340                 }
 341         if ((s->rbio != NULL) && (s->rbio != rbio))
 342                 BIO_free_all(s->rbio);
 343         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 344                 BIO_free_all(s->wbio);
 345         s->rbio=rbio;
 346         s->wbio=wbio;
 347         }
 348
 349 BIO *SSL_get_rbio(SSL *s)
 350         { return(s->rbio); }
 351
 352 BIO *SSL_get_wbio(SSL *s)
 353         { return(s->wbio); }
 354
 355 int SSL_get_fd(SSL *s)
 356         {
 357         int ret= -1;
 358         BIO *b,*r;
 359
 360         b=SSL_get_rbio(s);
 361         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 362         if (r != NULL)
 363                 BIO_get_fd(r,&ret);
 364         return(ret);
 365         }
 366
 367 #ifndef NO_SOCK
 368 int SSL_set_fd(SSL *s,int fd)
 369         {
 370         int ret=0;
 371         BIO *bio=NULL;
 372
 373         bio=BIO_new(BIO_s_socket());
 374
 375         if (bio == NULL)
 376                 {
 377                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 378                 goto err;
 379                 }
 380         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 381         SSL_set_bio(s,bio,bio);
 382         ret=1;
 383 err:
 384         return(ret);
 385         }
 386
 387 int SSL_set_wfd(SSL *s,int fd)
 388         {
 389         int ret=0;
 390         BIO *bio=NULL;
 391
 392         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 393                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 394                 {
 395                 bio=BIO_new(BIO_s_socket());
 396
 397                 if (bio == NULL)
 398                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 399                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 400                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 401                 }
 402         else
 403                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 404         ret=1;
 405 err:
 406         return(ret);
 407         }
 408
 409 int SSL_set_rfd(SSL *s,int fd)
 410         {
 411         int ret=0;
 412         BIO *bio=NULL;
 413
 414         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 415                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 416                 {
 417                 bio=BIO_new(BIO_s_socket());
 418
 419                 if (bio == NULL)
 420                         {
 421                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 422                         goto err;
 423                         }
 424                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 425                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 426                 }
 427         else
 428                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 429         ret=1;
 430 err:
 431         return(ret);
 432         }
 433 #endif
 434
 435 int SSL_get_verify_mode(SSL *s)
 436         {
 437         return(s->verify_mode);
 438         }
 439
 440 int SSL_get_verify_depth(SSL *s)
 441         {
 442         return(s->verify_depth);
 443         }
 444
 445 int (*SSL_get_verify_callback(SSL *s))(int,X509_STORE_CTX *)
 446         {
 447         return(s->verify_callback);
 448         }
 449
 450 int SSL_CTX_get_verify_mode(SSL_CTX *ctx)
 451         {
 452         return(ctx->verify_mode);
 453         }
 454
 455 int SSL_CTX_get_verify_depth(SSL_CTX *ctx)
 456         {
 457         return(ctx->verify_depth);
 458         }
 459
 460 int (*SSL_CTX_get_verify_callback(SSL_CTX *ctx))(int,X509_STORE_CTX *)
 461         {
 462         return(ctx->default_verify_callback);
 463         }
 464
 465 void SSL_set_verify(SSL *s,int mode,
 466                     int (*callback)(int ok,X509_STORE_CTX *ctx))
 467         {
 468         s->verify_mode=mode;
 469         if (callback != NULL)
 470                 s->verify_callback=callback;
 471         }
 472
 473 void SSL_set_verify_depth(SSL *s,int depth)
 474         {
 475         s->verify_depth=depth;
 476         }
 477
 478 void SSL_set_read_ahead(SSL *s,int yes)
 479         {
 480         s->read_ahead=yes;
 481         }
 482
 483 int SSL_get_read_ahead(SSL *s)
 484         {
 485         return(s->read_ahead);
 486         }
 487
 488 int SSL_pending(SSL *s)
 489         {
 490         return(s->method->ssl_pending(s));
 491         }
 492
 493 X509 *SSL_get_peer_certificate(SSL *s)
 494         {
 495         X509 *r;
 496
 497         if ((s == NULL) || (s->session == NULL))
 498                 r=NULL;
 499         else
 500                 r=s->session->peer;
 501
 502         if (r == NULL) return(r);
 503
 504         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 505
 506         return(r);
 507         }
 508
 509 STACK_OF(X509) *SSL_get_peer_cert_chain(SSL *s)
 510         {
 511         STACK_OF(X509) *r;
 512
 513         if ((s == NULL) || (s->session == NULL) || (s->session->cert == NULL))
 514                 r=NULL;
 515         else
 516                 r=s->session->cert->cert_chain;
 517
 518         return(r);
 519         }
 520
 521 /* Now in theory, since the calling process own 't' it should be safe to
 522  * modify.  We need to be able to read f without being hassled */
 523 void SSL_copy_session_id(SSL *t,SSL *f)
 524         {
 525         CERT *tmp;
 526
 527         /* Do we need to to SSL locking? */
 528         SSL_set_session(t,SSL_get_session(f));
 529
 530         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 531          * vice-versa */
 532         if (t->method != f->method)
 533                 {
 534                 t->method->ssl_free(t); /* cleanup current */
 535                 t->method=f->method;    /* change method */
 536                 t->method->ssl_new(t);  /* setup new */
 537                 }
 538
 539         tmp=t->cert;
 540         if (f->cert != NULL)
 541                 {
 542                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 543                 t->cert=f->cert;
 544                 }
 545         else
 546                 t->cert=NULL;
 547         if (tmp != NULL) ssl_cert_free(tmp);
 548         SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
 549         }
 550
 551 /* Fix this so it checks all the valid key/cert options */
 552 int SSL_CTX_check_private_key(SSL_CTX *ctx)
 553         {
 554         if (    (ctx == NULL) ||
 555                 (ctx->cert == NULL) ||
 556                 (ctx->cert->key->x509 == NULL))
 557                 {
 558                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 559                 return(0);
 560                 }
 561         if      (ctx->cert->key->privatekey == NULL)
 562                 {
 563                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 564                 return(0);
 565                 }
 566         return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
 567         }
 568
 569 /* Fix this function so that it takes an optional type parameter */
 570 int SSL_check_private_key(SSL *ssl)
 571         {
 572         if (ssl == NULL)
 573                 {
 574                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 575                 return(0);
 576                 }
 577         if (ssl->cert == NULL)
 578                 return(SSL_CTX_check_private_key(ssl->ctx));
 579         if (ssl->cert->key->x509 == NULL)
 580                 {
 581                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 582                 return(0);
 583                 }
 584         if (ssl->cert->key->privatekey == NULL)
 585                 {
 586                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 587                 return(0);
 588                 }
 589         return(X509_check_private_key(ssl->cert->key->x509,
 590                 ssl->cert->key->privatekey));
 591         }
 592
 593 int SSL_accept(SSL *s)
 594         {
 595         return(s->method->ssl_accept(s));
 596         }
 597
 598 int SSL_connect(SSL *s)
 599         {
 600         return(s->method->ssl_connect(s));
 601         }
 602
 603 long SSL_get_default_timeout(SSL *s)
 604         {
 605         return(s->method->get_timeout());
 606         }
 607
 608 int SSL_read(SSL *s,char *buf,int num)
 609         {
 610         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 611                 {
 612                 s->rwstate=SSL_NOTHING;
 613                 return(0);
 614                 }
 615         return(s->method->ssl_read(s,buf,num));
 616         }
 617
 618 int SSL_peek(SSL *s,char *buf,int num)
 619         {
 620         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 621                 {
 622                 return(0);
 623                 }
 624         return(s->method->ssl_peek(s,buf,num));
 625         }
 626
 627 int SSL_write(SSL *s,const char *buf,int num)
 628         {
 629         if (s->shutdown & SSL_SENT_SHUTDOWN)
 630                 {
 631                 s->rwstate=SSL_NOTHING;
 632                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 633                 return(-1);
 634                 }
 635         return(s->method->ssl_write(s,buf,num));
 636         }
 637
 638 int SSL_shutdown(SSL *s)
 639         {
 640         if ((s != NULL) && !SSL_in_init(s))
 641                 return(s->method->ssl_shutdown(s));
 642         else
 643                 return(1);
 644         }
 645
 646 int SSL_renegotiate(SSL *s)
 647         {
 648         s->new_session=1;
 649         return(s->method->ssl_renegotiate(s));
 650         }
 651
 652 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
 653         {
 654         long l;
 655
 656         switch (cmd)
 657                 {
 658         case SSL_CTRL_GET_READ_AHEAD:
 659                 return(s->read_ahead);
 660         case SSL_CTRL_SET_READ_AHEAD:
 661                 l=s->read_ahead;
 662                 s->read_ahead=larg;
 663                 return(l);
 664         case SSL_CTRL_OPTIONS:
 665                 return(s->options|=larg);
 666         default:
 667                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
 668                 }
 669         }
 670
 671 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
 672         {
 673         long l;
 674
 675         switch (cmd)
 676                 {
 677         case SSL_CTRL_GET_READ_AHEAD:
 678                 return(ctx->read_ahead);
 679         case SSL_CTRL_SET_READ_AHEAD:
 680                 l=ctx->read_ahead;
 681                 ctx->read_ahead=larg;
 682                 return(l);
 683
 684         case SSL_CTRL_SET_SESS_CACHE_SIZE:
 685                 l=ctx->session_cache_size;
 686                 ctx->session_cache_size=larg;
 687                 return(l);
 688         case SSL_CTRL_GET_SESS_CACHE_SIZE:
 689                 return(ctx->session_cache_size);
 690         case SSL_CTRL_SET_SESS_CACHE_MODE:
 691                 l=ctx->session_cache_mode;
 692                 ctx->session_cache_mode=larg;
 693                 return(l);
 694         case SSL_CTRL_GET_SESS_CACHE_MODE:
 695                 return(ctx->session_cache_mode);
 696
 697         case SSL_CTRL_SESS_NUMBER:
 698                 return(ctx->sessions->num_items);
 699         case SSL_CTRL_SESS_CONNECT:
 700                 return(ctx->stats.sess_connect);
 701         case SSL_CTRL_SESS_CONNECT_GOOD:
 702                 return(ctx->stats.sess_connect_good);
 703         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
 704                 return(ctx->stats.sess_connect_renegotiate);
 705         case SSL_CTRL_SESS_ACCEPT:
 706                 return(ctx->stats.sess_accept);
 707         case SSL_CTRL_SESS_ACCEPT_GOOD:
 708                 return(ctx->stats.sess_accept_good);
 709         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
 710                 return(ctx->stats.sess_accept_renegotiate);
 711         case SSL_CTRL_SESS_HIT:
 712                 return(ctx->stats.sess_hit);
 713         case SSL_CTRL_SESS_CB_HIT:
 714                 return(ctx->stats.sess_cb_hit);
 715         case SSL_CTRL_SESS_MISSES:
 716                 return(ctx->stats.sess_miss);
 717         case SSL_CTRL_SESS_TIMEOUTS:
 718                 return(ctx->stats.sess_timeout);
 719         case SSL_CTRL_SESS_CACHE_FULL:
 720                 return(ctx->stats.sess_cache_full);
 721         case SSL_CTRL_OPTIONS:
 722                 return(ctx->options|=larg);
 723         default:
 724                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
 725                 }
 726         }
 727
 728 int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b)
 729         {
 730         long l;
 731
 732         l=a->id-b->id;
 733         if (l == 0L)
 734                 return(0);
 735         else
 736                 return((l > 0)?1:-1);
 737         }
 738
 739 int ssl_cipher_ptr_id_cmp(SSL_CIPHER **ap,SSL_CIPHER **bp)
 740         {
 741         long l;
 742
 743         l=(*ap)->id-(*bp)->id;
 744         if (l == 0L)
 745                 return(0);
 746         else
 747                 return((l > 0)?1:-1);
 748         }
 749
 750 /** return a STACK of the ciphers available for the SSL and in order of
 751  * preference */
 752 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
 753         {
 754         if ((s != NULL) && (s->cipher_list != NULL))
 755                 {
 756                 return(s->cipher_list);
 757                 }
 758         else if ((s->ctx != NULL) &&
 759                 (s->ctx->cipher_list != NULL))
 760                 {
 761                 return(s->ctx->cipher_list);
 762                 }
 763         return(NULL);
 764         }
 765
 766 /** return a STACK of the ciphers available for the SSL and in order of
 767  * algorithm id */
 768 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
 769         {
 770         if ((s != NULL) && (s->cipher_list_by_id != NULL))
 771                 {
 772                 return(s->cipher_list_by_id);
 773                 }
 774         else if ((s != NULL) && (s->ctx != NULL) &&
 775                 (s->ctx->cipher_list_by_id != NULL))
 776                 {
 777                 return(s->ctx->cipher_list_by_id);
 778                 }
 779         return(NULL);
 780         }
 781
 782 /** The old interface to get the same thing as SSL_get_ciphers() */
 783 const char *SSL_get_cipher_list(SSL *s,int n)
 784         {
 785         SSL_CIPHER *c;
 786         STACK_OF(SSL_CIPHER) *sk;
 787
 788         if (s == NULL) return(NULL);
 789         sk=SSL_get_ciphers(s);
 790         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
 791                 return(NULL);
 792         c=sk_SSL_CIPHER_value(sk,n);
 793         if (c == NULL) return(NULL);
 794         return(c->name);
 795         }
 796
 797 /** specify the ciphers to be used by defaut by the SSL_CTX */
 798 int SSL_CTX_set_cipher_list(SSL_CTX *ctx,char *str)
 799         {
 800         STACK_OF(SSL_CIPHER) *sk;
 801
 802         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
 803                 &ctx->cipher_list_by_id,str);
 804 /* XXXX */
 805         return((sk == NULL)?0:1);
 806         }
 807
 808 /** specify the ciphers to be used by the SSL */
 809 int SSL_set_cipher_list(SSL *s,char *str)
 810         {
 811         STACK_OF(SSL_CIPHER) *sk;
 812
 813         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
 814                 &s->cipher_list_by_id,str);
 815 /* XXXX */
 816         return((sk == NULL)?0:1);
 817         }
 818
 819 /* works well for SSLv2, not so good for SSLv3 */
 820 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
 821         {
 822         char *p;
 823         const char *cp;
 824         STACK_OF(SSL_CIPHER) *sk;
 825         SSL_CIPHER *c;
 826         int i;
 827
 828         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
 829                 (len < 2))
 830                 return(NULL);
 831
 832         p=buf;
 833         sk=s->session->ciphers;
 834         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 835                 {
 836                 /* Decrement for either the ':' or a '\0' */
 837                 len--;
 838                 c=sk_SSL_CIPHER_value(sk,i);
 839                 for (cp=c->name; *cp; )
 840                         {
 841                         if (len-- == 0)
 842                                 {
 843                                 *p='\0';
 844                                 return(buf);
 845                                 }
 846                         else
 847                                 *(p++)= *(cp++);
 848                         }
 849                 *(p++)=':';
 850                 }
 851         p[-1]='\0';
 852         return(buf);
 853         }
 854
 855 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
 856         {
 857         int i,j=0;
 858         SSL_CIPHER *c;
 859         unsigned char *q;
 860
 861         if (sk == NULL) return(0);
 862         q=p;
 863
 864         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 865                 {
 866                 c=sk_SSL_CIPHER_value(sk,i);
 867                 j=ssl_put_cipher_by_char(s,c,p);
 868                 p+=j;
 869                 }
 870         return(p-q);
 871         }
 872
 873 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
 874                                                STACK_OF(SSL_CIPHER) **skp)
 875         {
 876         SSL_CIPHER *c;
 877         STACK_OF(SSL_CIPHER) *sk;
 878         int i,n;
 879
 880         n=ssl_put_cipher_by_char(s,NULL,NULL);
 881         if ((num%n) != 0)
 882                 {
 883                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
 884                 return(NULL);
 885                 }
 886         if ((skp == NULL) || (*skp == NULL))
 887                 sk=sk_SSL_CIPHER_new(NULL); /* change perhaps later */
 888         else
 889                 {
 890                 sk= *skp;
 891                 sk_SSL_CIPHER_zero(sk);
 892                 }
 893
 894         for (i=0; i<num; i+=n)
 895                 {
 896                 c=ssl_get_cipher_by_char(s,p);
 897                 p+=n;
 898                 if (c != NULL)
 899                         {
 900                         if (!sk_SSL_CIPHER_push(sk,c))
 901                                 {
 902                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
 903                                 goto err;
 904                                 }
 905                         }
 906                 }
 907
 908         if (skp != NULL)
 909                 *skp=sk;
 910         return(sk);
 911 err:
 912         if ((skp == NULL) || (*skp == NULL))
 913                 sk_SSL_CIPHER_free(sk);
 914         return(NULL);
 915         }
 916
 917 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
 918         {
 919         unsigned long l;
 920
 921         l=(unsigned long)
 922                 ((unsigned int) a->session_id[0]     )|
 923                 ((unsigned int) a->session_id[1]<< 8L)|
 924                 ((unsigned long)a->session_id[2]<<16L)|
 925                 ((unsigned long)a->session_id[3]<<24L);
 926         return(l);
 927         }
 928
 929 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
 930         {
 931         if (a->ssl_version != b->ssl_version)
 932                 return(1);
 933         if (a->session_id_length != b->session_id_length)
 934                 return(1);
 935         return(memcmp(a->session_id,b->session_id,a->session_id_length));
 936         }
 937
 938 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
 939         {
 940         SSL_CTX *ret=NULL;
 941
 942         if (meth == NULL)
 943                 {
 944                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
 945                 return(NULL);
 946                 }
 947
 948         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
 949                 {
 950                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
 951                 goto err;
 952                 }
 953         ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
 954         if (ret == NULL)
 955                 goto err;
 956
 957         memset(ret,0,sizeof(SSL_CTX));
 958
 959         ret->method=meth;
 960
 961         ret->cert_store=NULL;
 962         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
 963         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
 964         ret->session_cache_head=NULL;
 965         ret->session_cache_tail=NULL;
 966
 967         /* We take the system default */
 968         ret->session_timeout=meth->get_timeout();
 969
 970         ret->new_session_cb=NULL;
 971         ret->remove_session_cb=NULL;
 972         ret->get_session_cb=NULL;
 973
 974         memset((char *)&ret->stats,0,sizeof(ret->stats));
 975
 976         ret->references=1;
 977         ret->quiet_shutdown=0;
 978
 979 /*      ret->cipher=NULL;*/
 980 /*      ret->s2->challenge=NULL;
 981         ret->master_key=NULL;
 982         ret->key_arg=NULL;
 983         ret->s2->conn_id=NULL; */
 984
 985         ret->info_callback=NULL;
 986
 987         ret->app_verify_callback=NULL;
 988         ret->app_verify_arg=NULL;
 989
 990         ret->read_ahead=0;
 991         ret->verify_mode=SSL_VERIFY_NONE;
 992         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
 993         ret->default_verify_callback=NULL;
 994         if ((ret->cert=ssl_cert_new()) == NULL)
 995                 goto err;
 996
 997         ret->default_passwd_callback=NULL;
 998         ret->client_cert_cb=NULL;
 999
1000         ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
1001         if (ret->sessions == NULL) goto err;
1002         ret->cert_store=X509_STORE_new();
1003         if (ret->cert_store == NULL) goto err;
1004
1005         ssl_create_cipher_list(ret->method,
1006                 &ret->cipher_list,&ret->cipher_list_by_id,
1007                 SSL_DEFAULT_CIPHER_LIST);
1008         if (ret->cipher_list == NULL
1009             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1010                 {
1011                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1012                 goto err2;
1013                 }
1014
1015         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1016                 {
1017                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1018                 goto err2;
1019                 }
1020         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1021                 {
1022                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1023                 goto err2;
1024                 }
1025         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1026                 {
1027                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1028                 goto err2;
1029                 }
1030
1031         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1032                 goto err;
1033
1034         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
1035
1036         ret->extra_certs=NULL;
1037         ret->comp_methods=SSL_COMP_get_compression_methods();
1038
1039         return(ret);
1040 err:
1041         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1042 err2:
1043         if (ret != NULL) SSL_CTX_free(ret);
1044         return(NULL);
1045         }
1046
1047 static void SSL_COMP_free(SSL_COMP *comp)
1048     { Free(comp); }
1049
1050 void SSL_CTX_free(SSL_CTX *a)
1051         {
1052         int i;
1053
1054         if (a == NULL) return;
1055
1056         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1057 #ifdef REF_PRINT
1058         REF_PRINT("SSL_CTX",a);
1059 #endif
1060         if (i > 0) return;
1061 #ifdef REF_CHECK
1062         if (i < 0)
1063                 {
1064                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1065                 abort(); /* ok */
1066                 }
1067 #endif
1068         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1069
1070         if (a->sessions != NULL)
1071                 {
1072                 SSL_CTX_flush_sessions(a,0);
1073                 lh_free(a->sessions);
1074                 }
1075         if (a->cert_store != NULL)
1076                 X509_STORE_free(a->cert_store);
1077         if (a->cipher_list != NULL)
1078                 sk_SSL_CIPHER_free(a->cipher_list);
1079         if (a->cipher_list_by_id != NULL)
1080                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1081         if (a->cert != NULL)
1082                 ssl_cert_free(a->cert);
1083         if (a->client_CA != NULL)
1084                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1085         if (a->extra_certs != NULL)
1086                 sk_X509_pop_free(a->extra_certs,X509_free);
1087         if (a->comp_methods != NULL)
1088                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1089         Free((char *)a);
1090         }
1091
1092 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx,int (*cb)())
1093         {
1094         ctx->default_passwd_callback=cb;
1095         }
1096
1097 void SSL_CTX_set_cert_verify_cb(SSL_CTX *ctx,int (*cb)(),char *arg)
1098         {
1099         ctx->app_verify_callback=cb;
1100         ctx->app_verify_arg=arg;
1101         }
1102
1103 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1104         {
1105         ctx->verify_mode=mode;
1106         ctx->default_verify_callback=cb;
1107         /* This needs cleaning up EAY EAY EAY */
1108         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1109         }
1110
1111 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1112         {
1113         ctx->verify_depth=depth;
1114         }
1115
1116 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1117         {
1118         CERT_PKEY *cpk;
1119         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1120         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1121         int rsa_tmp_export,dh_tmp_export,kl;
1122         unsigned long mask,emask;
1123
1124         if (c == NULL) return;
1125
1126         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1127
1128 #ifndef NO_RSA
1129         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1130         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1131                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1132 #else
1133         rsa_tmp=rsa_tmp_export=0;
1134 #endif
1135 #ifndef NO_DH
1136         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1137         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1138                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1139 #else
1140         dh_tmp=dh_tmp_export=0;
1141 #endif
1142
1143         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1144         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1145         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1146         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1147         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1148         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1149         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1150         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1151         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1152         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1153         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1154 /* FIX THIS EAY EAY EAY */
1155         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1156         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1157
1158         mask=0;
1159         emask=0;
1160
1161 #ifdef CIPHER_DEBUG
1162         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1163                 rsa_tmp,rsa_tmp_export,dh_tmp,
1164                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1165 #endif
1166
1167         if (rsa_enc || (rsa_tmp && rsa_sign))
1168                 mask|=SSL_kRSA;
1169         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1170                 emask|=SSL_kRSA;
1171
1172 #if 0
1173         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1174         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1175                 (rsa_enc || rsa_sign || dsa_sign))
1176                 mask|=SSL_kEDH;
1177         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1178                 (rsa_enc || rsa_sign || dsa_sign))
1179                 emask|=SSL_kEDH;
1180 #endif
1181
1182         if (dh_tmp_export)
1183                 emask|=SSL_kEDH;
1184
1185         if (dh_tmp)
1186                 mask|=SSL_kEDH;
1187
1188         if (dh_rsa) mask|=SSL_kDHr;
1189         if (dh_rsa_export) emask|=SSL_kDHr;
1190
1191         if (dh_dsa) mask|=SSL_kDHd;
1192         if (dh_dsa_export) emask|=SSL_kDHd;
1193
1194         if (rsa_enc || rsa_sign)
1195                 {
1196                 mask|=SSL_aRSA;
1197                 emask|=SSL_aRSA;
1198                 }
1199
1200         if (dsa_sign)
1201                 {
1202                 mask|=SSL_aDSS;
1203                 emask|=SSL_aDSS;
1204                 }
1205
1206 #ifdef SSL_ALLOW_ADH
1207         mask|=SSL_aNULL;
1208         emask|=SSL_aNULL;
1209 #endif
1210
1211         c->mask=mask;
1212         c->export_mask=emask;
1213         c->valid=1;
1214         }
1215
1216 /* THIS NEEDS CLEANING UP */
1217 X509 *ssl_get_server_send_cert(SSL *s)
1218         {
1219         unsigned long alg,mask,kalg;
1220         CERT *c;
1221         int i,export;
1222
1223         c=s->cert;
1224         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1225         alg=s->s3->tmp.new_cipher->algorithms;
1226         export=SSL_IS_EXPORT(alg);
1227         mask=export?c->export_mask:c->mask;
1228         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1229
1230         if      (kalg & SSL_kDHr)
1231                 i=SSL_PKEY_DH_RSA;
1232         else if (kalg & SSL_kDHd)
1233                 i=SSL_PKEY_DH_DSA;
1234         else if (kalg & SSL_aDSS)
1235                 i=SSL_PKEY_DSA_SIGN;
1236         else if (kalg & SSL_aRSA)
1237                 {
1238                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1239                         i=SSL_PKEY_RSA_SIGN;
1240                 else
1241                         i=SSL_PKEY_RSA_ENC;
1242                 }
1243         else /* if (kalg & SSL_aNULL) */
1244                 {
1245                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1246                 return(NULL);
1247                 }
1248         if (c->pkeys[i].x509 == NULL) return(NULL);
1249         return(c->pkeys[i].x509);
1250         }
1251
1252 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1253         {
1254         unsigned long alg;
1255         CERT *c;
1256
1257         alg=cipher->algorithms;
1258         c=s->cert;
1259
1260         if ((alg & SSL_aDSS) &&
1261                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1262                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1263         else if (alg & SSL_aRSA)
1264                 {
1265                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1266                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1267                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1268                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1269                 else
1270                         return(NULL);
1271                 }
1272         else /* if (alg & SSL_aNULL) */
1273                 {
1274                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1275                 return(NULL);
1276                 }
1277         }
1278
1279 void ssl_update_cache(SSL *s,int mode)
1280         {
1281         int i;
1282
1283         /* If the session_id_length is 0, we are not supposed to cache it,
1284          * and it would be rather hard to do anyway :-) */
1285         if (s->session->session_id_length == 0) return;
1286
1287         if ((s->ctx->session_cache_mode & mode)
1288                 && (!s->hit)
1289                 && SSL_CTX_add_session(s->ctx,s->session)
1290                 && (s->ctx->new_session_cb != NULL))
1291                 {
1292                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1293                 if (!s->ctx->new_session_cb(s,s->session))
1294                         SSL_SESSION_free(s->session);
1295                 }
1296
1297         /* auto flush every 255 connections */
1298         i=s->ctx->session_cache_mode;
1299         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1300                 ((i & mode) == mode))
1301                 {
1302                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1303                         ?s->ctx->stats.sess_connect_good
1304                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1305                         {
1306                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1307                         }
1308                 }
1309         }
1310
1311 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1312         {
1313         return(s->method);
1314         }
1315
1316 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1317         {
1318         int conn= -1;
1319         int ret=1;
1320
1321         if (s->method != meth)
1322                 {
1323                 if (s->handshake_func != NULL)
1324                         conn=(s->handshake_func == s->method->ssl_connect);
1325
1326                 if (s->method->version == meth->version)
1327                         s->method=meth;
1328                 else
1329                         {
1330                         s->method->ssl_free(s);
1331                         s->method=meth;
1332                         ret=s->method->ssl_new(s);
1333                         }
1334
1335                 if (conn == 1)
1336                         s->handshake_func=meth->ssl_connect;
1337                 else if (conn == 0)
1338                         s->handshake_func=meth->ssl_accept;
1339                 }
1340         return(ret);
1341         }
1342
1343 int SSL_get_error(SSL *s,int i)
1344         {
1345         int reason;
1346         unsigned long l;
1347         BIO *bio;
1348
1349         if (i > 0) return(SSL_ERROR_NONE);
1350
1351         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1352          * etc, where we do encode the error */
1353         if ((l=ERR_peek_error()) != 0)
1354                 {
1355                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1356                         return(SSL_ERROR_SYSCALL);
1357                 else
1358                         return(SSL_ERROR_SSL);
1359                 }
1360
1361         if ((i < 0) && SSL_want_read(s))
1362                 {
1363                 bio=SSL_get_rbio(s);
1364                 if (BIO_should_read(bio))
1365                         return(SSL_ERROR_WANT_READ);
1366                 else if (BIO_should_write(bio))
1367                         return(SSL_ERROR_WANT_WRITE);
1368                 else if (BIO_should_io_special(bio))
1369                         {
1370                         reason=BIO_get_retry_reason(bio);
1371                         if (reason == BIO_RR_CONNECT)
1372                                 return(SSL_ERROR_WANT_CONNECT);
1373                         else
1374                                 return(SSL_ERROR_SYSCALL); /* unknown */
1375                         }
1376                 }
1377
1378         if ((i < 0) && SSL_want_write(s))
1379                 {
1380                 bio=SSL_get_wbio(s);
1381                 if (BIO_should_write(bio))
1382                         return(SSL_ERROR_WANT_WRITE);
1383                 else if (BIO_should_read(bio))
1384                         return(SSL_ERROR_WANT_READ);
1385                 else if (BIO_should_io_special(bio))
1386                         {
1387                         reason=BIO_get_retry_reason(bio);
1388                         if (reason == BIO_RR_CONNECT)
1389                                 return(SSL_ERROR_WANT_CONNECT);
1390                         else
1391                                 return(SSL_ERROR_SYSCALL);
1392                         }
1393                 }
1394         if ((i < 0) && SSL_want_x509_lookup(s))
1395                 {
1396                 return(SSL_ERROR_WANT_X509_LOOKUP);
1397                 }
1398
1399         if (i == 0)
1400                 {
1401                 if (s->version == SSL2_VERSION)
1402                         {
1403                         /* assume it is the socket being closed */
1404                         return(SSL_ERROR_ZERO_RETURN);
1405                         }
1406                 else
1407                         {
1408                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1409                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1410                                 return(SSL_ERROR_ZERO_RETURN);
1411                         }
1412                 }
1413         return(SSL_ERROR_SYSCALL);
1414         }
1415
1416 int SSL_do_handshake(SSL *s)
1417         {
1418         int ret=1;
1419
1420         if (s->handshake_func == NULL)
1421                 {
1422                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1423                 return(-1);
1424                 }
1425
1426         s->method->ssl_renegotiate_check(s);
1427
1428         if (SSL_in_init(s) || SSL_in_before(s))
1429                 {
1430                 ret=s->handshake_func(s);
1431                 }
1432         return(ret);
1433         }
1434
1435 /* For the next 2 functions, SSL_clear() sets shutdown and so
1436  * one of these calls will reset it */
1437 void SSL_set_accept_state(SSL *s)
1438         {
1439         s->server=1;
1440         s->shutdown=0;
1441         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1442         s->handshake_func=s->method->ssl_accept;
1443         /* clear the current cipher */
1444         ssl_clear_cipher_ctx(s);
1445         }
1446
1447 void SSL_set_connect_state(SSL *s)
1448         {
1449         s->server=0;
1450         s->shutdown=0;
1451         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1452         s->handshake_func=s->method->ssl_connect;
1453         /* clear the current cipher */
1454         ssl_clear_cipher_ctx(s);
1455         }
1456
1457 int ssl_undefined_function(SSL *s)
1458         {
1459         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1460         return(0);
1461         }
1462
1463 SSL_METHOD *ssl_bad_method(int ver)
1464         {
1465         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1466         return(NULL);
1467         }
1468
1469 char *SSL_get_version(SSL *s)
1470         {
1471         if (s->version == TLS1_VERSION)
1472                 return("TLSv1");
1473         else if (s->version == SSL3_VERSION)
1474                 return("SSLv3");
1475         else if (s->version == SSL2_VERSION)
1476                 return("SSLv2");
1477         else
1478                 return("unknown");
1479         }
1480
1481 SSL *SSL_dup(SSL *s)
1482         {
1483         STACK_OF(X509_NAME) *sk;
1484         X509_NAME *xn;
1485         SSL *ret;
1486         int i;
1487
1488         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
1489             return(NULL);
1490
1491         /* This copies version, session-id, SSL_METHOD and 'cert' */
1492         SSL_copy_session_id(ret,s);
1493
1494         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1495         SSL_set_verify(ret,SSL_get_verify_mode(s),
1496                 SSL_get_verify_callback(s));
1497         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
1498
1499         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1500
1501         ret->debug=s->debug;
1502         ret->options=s->options;
1503
1504         /* copy app data, a little dangerous perhaps */
1505         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1506                 goto err;
1507
1508         /* setup rbio, and wbio */
1509         if (s->rbio != NULL)
1510                 {
1511                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1512                         goto err;
1513                 }
1514         if (s->wbio != NULL)
1515                 {
1516                 if (s->wbio != s->rbio)
1517                         {
1518                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1519                                 goto err;
1520                         }
1521                 else
1522                         ret->wbio=ret->rbio;
1523                 }
1524
1525         /* dup the cipher_list and cipher_list_by_id stacks */
1526         if (s->cipher_list != NULL)
1527                 {
1528                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
1529                         goto err;
1530                 }
1531         if (s->cipher_list_by_id != NULL)
1532                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
1533                         == NULL)
1534                         goto err;
1535
1536         /* Dup the client_CA list */
1537         if (s->client_CA != NULL)
1538                 {
1539                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
1540                 ret->client_CA=sk;
1541                 for (i=0; i<sk_X509_NAME_num(sk); i++)
1542                         {
1543                         xn=sk_X509_NAME_value(sk,i);
1544                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
1545                                 {
1546                                 X509_NAME_free(xn);
1547                                 goto err;
1548                                 }
1549                         }
1550                 }
1551
1552         ret->shutdown=s->shutdown;
1553         ret->state=s->state;
1554         ret->handshake_func=s->handshake_func;
1555         ret->server=s->server;
1556
1557         if (0)
1558                 {
1559 err:
1560                 if (ret != NULL) SSL_free(ret);
1561                 ret=NULL;
1562                 }
1563         return(ret);
1564         }
1565
1566 void ssl_clear_cipher_ctx(SSL *s)
1567         {
1568         if (s->enc_read_ctx != NULL)
1569                 {
1570                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1571                 Free(s->enc_read_ctx);
1572                 s->enc_read_ctx=NULL;
1573                 }
1574         if (s->enc_write_ctx != NULL)
1575                 {
1576                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1577                 Free(s->enc_write_ctx);
1578                 s->enc_write_ctx=NULL;
1579                 }
1580         if (s->expand != NULL)
1581                 {
1582                 COMP_CTX_free(s->expand);
1583                 s->expand=NULL;
1584                 }
1585         if (s->compress != NULL)
1586                 {
1587                 COMP_CTX_free(s->compress);
1588                 s->compress=NULL;
1589                 }
1590         }
1591
1592 /* Fix this function so that it takes an optional type parameter */
1593 X509 *SSL_get_certificate(SSL *s)
1594         {
1595         if (s->cert != NULL)
1596                 return(s->cert->key->x509);
1597         else
1598                 return(NULL);
1599         }
1600
1601 /* Fix this function so that it takes an optional type parameter */
1602 EVP_PKEY *SSL_get_privatekey(SSL *s)
1603         {
1604         if (s->cert != NULL)
1605                 return(s->cert->key->privatekey);
1606         else
1607                 return(NULL);
1608         }
1609
1610 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1611         {
1612         if ((s->session != NULL) && (s->session->cipher != NULL))
1613                 return(s->session->cipher);
1614         return(NULL);
1615         }
1616
1617 int ssl_init_wbio_buffer(SSL *s,int push)
1618         {
1619         BIO *bbio;
1620
1621         if (s->bbio == NULL)
1622                 {
1623                 bbio=BIO_new(BIO_f_buffer());
1624                 if (bbio == NULL) return(0);
1625                 s->bbio=bbio;
1626                 }
1627         else
1628                 {
1629                 bbio=s->bbio;
1630                 if (s->bbio == s->wbio)
1631                         s->wbio=BIO_pop(s->wbio);
1632                 }
1633         BIO_reset(bbio);
1634 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1635         if (!BIO_set_read_buffer_size(bbio,1))
1636                 {
1637                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1638                 return(0);
1639                 }
1640         if (push)
1641                 {
1642                 if (s->wbio != bbio)
1643                         s->wbio=BIO_push(bbio,s->wbio);
1644                 }
1645         else
1646                 {
1647                 if (s->wbio == bbio)
1648                         s->wbio=BIO_pop(bbio);
1649                 }
1650         return(1);
1651         }
1652
1653 void ssl_free_wbio_buffer(SSL *s)
1654         {
1655         BIO *under;
1656
1657         if (s->bbio == NULL) return;
1658
1659         if (s->bbio == s->wbio)
1660                 {
1661                 /* remove buffering */
1662                 under=BIO_pop(s->wbio);
1663                 if (under != NULL)
1664                         s->wbio=under;
1665                 else
1666                         abort(); /* ok */
1667                 }
1668         BIO_free(s->bbio);
1669         s->bbio=NULL;
1670         }
1671
1672 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1673         {
1674         ctx->quiet_shutdown=mode;
1675         }
1676
1677 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1678         {
1679         return(ctx->quiet_shutdown);
1680         }
1681
1682 void SSL_set_quiet_shutdown(SSL *s,int mode)
1683         {
1684         s->quiet_shutdown=mode;
1685         }
1686
1687 int SSL_get_quiet_shutdown(SSL *s)
1688         {
1689         return(s->quiet_shutdown);
1690         }
1691
1692 void SSL_set_shutdown(SSL *s,int mode)
1693         {
1694         s->shutdown=mode;
1695         }
1696
1697 int SSL_get_shutdown(SSL *s)
1698         {
1699         return(s->shutdown);
1700         }
1701
1702 int SSL_version(SSL *s)
1703         {
1704         return(s->version);
1705         }
1706
1707 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1708         {
1709         return(ssl->ctx);
1710         }
1711
1712 #ifndef NO_STDIO
1713 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1714         {
1715         return(X509_STORE_set_default_paths(ctx->cert_store));
1716         }
1717
1718 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
1719                 const char *CApath)
1720         {
1721         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
1722         }
1723 #endif
1724
1725 void SSL_set_info_callback(SSL *ssl,void (*cb)())
1726         {
1727         ssl->info_callback=cb;
1728         }
1729
1730 void (*SSL_get_info_callback(SSL *ssl))(void)
1731         {
1732         return((void (*)())ssl->info_callback);
1733         }
1734
1735 int SSL_state(SSL *ssl)
1736         {
1737         return(ssl->state);
1738         }
1739
1740 void SSL_set_verify_result(SSL *ssl,long arg)
1741         {
1742         ssl->verify_result=arg;
1743         }
1744
1745 long SSL_get_verify_result(SSL *ssl)
1746         {
1747         return(ssl->verify_result);
1748         }
1749
1750 int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1751                          int (*dup_func)(),void (*free_func)())
1752         {
1753         ssl_meth_num++;
1754         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
1755                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
1756         }
1757
1758 int SSL_set_ex_data(SSL *s,int idx,void *arg)
1759         {
1760         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1761         }
1762
1763 void *SSL_get_ex_data(SSL *s,int idx)
1764         {
1765         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1766         }
1767
1768 int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1769                              int (*dup_func)(),void (*free_func)())
1770         {
1771         ssl_ctx_meth_num++;
1772         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
1773                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
1774         }
1775
1776 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
1777         {
1778         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1779         }
1780
1781 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
1782         {
1783         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1784         }
1785
1786 int ssl_ok(SSL *s)
1787         {
1788         return(1);
1789         }
1790
1791 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
1792         {
1793         return(ctx->cert_store);
1794         }
1795
1796 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
1797         {
1798         if (ctx->cert_store != NULL)
1799                 X509_STORE_free(ctx->cert_store);
1800         ctx->cert_store=store;
1801         }
1802
1803 int SSL_want(SSL *s)
1804         {
1805         return(s->rwstate);
1806         }
1807
1808 /*!
1809  * \brief Set the callback for generating temporary RSA keys.
1810  * \param ctx the SSL context.
1811  * \param cb the callback
1812  */
1813
1814 #ifndef NO_RSA
1815 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,int export,
1816                                                           int keylength))
1817     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1818 #endif
1819
1820 #ifndef NO_RSA
1821 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
1822                                                           int keylength))
1823     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1824 #endif
1825
1826 #ifdef DOXYGEN
1827 /*!
1828  * \brief The RSA temporary key callback function.
1829  * \param ssl the SSL session.
1830  * \param export \c TRUE if the temp RSA key is for an export ciphersuite.
1831  * \param keylength if \c export is \c TRUE, then \c keylength is the size of
1832  * the required key in bits.
1833  * \return the temporary RSA key.
1834  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
1835  */
1836
1837 RSA *cb(SSL *ssl,int export,int keylength)
1838     {}
1839 #endif
1840
1841 /*!
1842  * \brief Set the callback for generating temporary DH keys.
1843  * \param ctx the SSL context.
1844  * \param dh the callback
1845  */
1846
1847 #ifndef NO_DH
1848 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int export,
1849                                                         int keylength))
1850     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1851
1852 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int export,
1853                                                         int keylength))
1854     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1855 #endif
1856
1857 #if defined(_WINDLL) && defined(WIN16)
1858 #include "../crypto/bio/bss_file.c"
1859 #endif
1860
1861 IMPLEMENT_STACK_OF(SSL_CIPHER)
1862 IMPLEMENT_STACK_OF(SSL_COMP)