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->sess_cert == NULL))
 514                 r=NULL;
 515         else
 516                 r=s->session->sess_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         if (s->handshake_func == 0)
 596                 /* Not properly initialized yet */
 597                 SSL_set_accept_state(s);
 598
 599         return(s->method->ssl_accept(s));
 600         }
 601
 602 int SSL_connect(SSL *s)
 603         {
 604         if (s->handshake_func == 0)
 605                 /* Not properly initialized yet */
 606                 SSL_set_connect_state(s);
 607
 608         return(s->method->ssl_connect(s));
 609         }
 610
 611 long SSL_get_default_timeout(SSL *s)
 612         {
 613         return(s->method->get_timeout());
 614         }
 615
 616 int SSL_read(SSL *s,char *buf,int num)
 617         {
 618         if (s->handshake_func == 0)
 619                 {
 620                 SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
 621                 return -1;
 622                 }
 623
 624         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 625                 {
 626                 s->rwstate=SSL_NOTHING;
 627                 return(0);
 628                 }
 629         return(s->method->ssl_read(s,buf,num));
 630         }
 631
 632 int SSL_peek(SSL *s,char *buf,int num)
 633         {
 634         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 635                 {
 636                 return(0);
 637                 }
 638         return(s->method->ssl_peek(s,buf,num));
 639         }
 640
 641 int SSL_write(SSL *s,const char *buf,int num)
 642         {
 643         if (s->handshake_func == 0)
 644                 {
 645                 SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
 646                 return -1;
 647                 }
 648
 649         if (s->shutdown & SSL_SENT_SHUTDOWN)
 650                 {
 651                 s->rwstate=SSL_NOTHING;
 652                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 653                 return(-1);
 654                 }
 655         return(s->method->ssl_write(s,buf,num));
 656         }
 657
 658 int SSL_shutdown(SSL *s)
 659         {
 660         if (s->handshake_func == 0)
 661                 {
 662                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
 663                 return -1;
 664                 }
 665
 666         if ((s != NULL) && !SSL_in_init(s))
 667                 return(s->method->ssl_shutdown(s));
 668         else
 669                 return(1);
 670         }
 671
 672 int SSL_renegotiate(SSL *s)
 673         {
 674         s->new_session=1;
 675         return(s->method->ssl_renegotiate(s));
 676         }
 677
 678 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
 679         {
 680         long l;
 681
 682         switch (cmd)
 683                 {
 684         case SSL_CTRL_GET_READ_AHEAD:
 685                 return(s->read_ahead);
 686         case SSL_CTRL_SET_READ_AHEAD:
 687                 l=s->read_ahead;
 688                 s->read_ahead=larg;
 689                 return(l);
 690         case SSL_CTRL_OPTIONS:
 691                 return(s->options|=larg);
 692         default:
 693                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
 694                 }
 695         }
 696
 697 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
 698         {
 699         long l;
 700
 701         switch (cmd)
 702                 {
 703         case SSL_CTRL_GET_READ_AHEAD:
 704                 return(ctx->read_ahead);
 705         case SSL_CTRL_SET_READ_AHEAD:
 706                 l=ctx->read_ahead;
 707                 ctx->read_ahead=larg;
 708                 return(l);
 709
 710         case SSL_CTRL_SET_SESS_CACHE_SIZE:
 711                 l=ctx->session_cache_size;
 712                 ctx->session_cache_size=larg;
 713                 return(l);
 714         case SSL_CTRL_GET_SESS_CACHE_SIZE:
 715                 return(ctx->session_cache_size);
 716         case SSL_CTRL_SET_SESS_CACHE_MODE:
 717                 l=ctx->session_cache_mode;
 718                 ctx->session_cache_mode=larg;
 719                 return(l);
 720         case SSL_CTRL_GET_SESS_CACHE_MODE:
 721                 return(ctx->session_cache_mode);
 722
 723         case SSL_CTRL_SESS_NUMBER:
 724                 return(ctx->sessions->num_items);
 725         case SSL_CTRL_SESS_CONNECT:
 726                 return(ctx->stats.sess_connect);
 727         case SSL_CTRL_SESS_CONNECT_GOOD:
 728                 return(ctx->stats.sess_connect_good);
 729         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
 730                 return(ctx->stats.sess_connect_renegotiate);
 731         case SSL_CTRL_SESS_ACCEPT:
 732                 return(ctx->stats.sess_accept);
 733         case SSL_CTRL_SESS_ACCEPT_GOOD:
 734                 return(ctx->stats.sess_accept_good);
 735         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
 736                 return(ctx->stats.sess_accept_renegotiate);
 737         case SSL_CTRL_SESS_HIT:
 738                 return(ctx->stats.sess_hit);
 739         case SSL_CTRL_SESS_CB_HIT:
 740                 return(ctx->stats.sess_cb_hit);
 741         case SSL_CTRL_SESS_MISSES:
 742                 return(ctx->stats.sess_miss);
 743         case SSL_CTRL_SESS_TIMEOUTS:
 744                 return(ctx->stats.sess_timeout);
 745         case SSL_CTRL_SESS_CACHE_FULL:
 746                 return(ctx->stats.sess_cache_full);
 747         case SSL_CTRL_OPTIONS:
 748                 return(ctx->options|=larg);
 749         default:
 750                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
 751                 }
 752         }
 753
 754 int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b)
 755         {
 756         long l;
 757
 758         l=a->id-b->id;
 759         if (l == 0L)
 760                 return(0);
 761         else
 762                 return((l > 0)?1:-1);
 763         }
 764
 765 int ssl_cipher_ptr_id_cmp(SSL_CIPHER **ap,SSL_CIPHER **bp)
 766         {
 767         long l;
 768
 769         l=(*ap)->id-(*bp)->id;
 770         if (l == 0L)
 771                 return(0);
 772         else
 773                 return((l > 0)?1:-1);
 774         }
 775
 776 /** return a STACK of the ciphers available for the SSL and in order of
 777  * preference */
 778 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
 779         {
 780         if ((s != NULL) && (s->cipher_list != NULL))
 781                 {
 782                 return(s->cipher_list);
 783                 }
 784         else if ((s->ctx != NULL) &&
 785                 (s->ctx->cipher_list != NULL))
 786                 {
 787                 return(s->ctx->cipher_list);
 788                 }
 789         return(NULL);
 790         }
 791
 792 /** return a STACK of the ciphers available for the SSL and in order of
 793  * algorithm id */
 794 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
 795         {
 796         if ((s != NULL) && (s->cipher_list_by_id != NULL))
 797                 {
 798                 return(s->cipher_list_by_id);
 799                 }
 800         else if ((s != NULL) && (s->ctx != NULL) &&
 801                 (s->ctx->cipher_list_by_id != NULL))
 802                 {
 803                 return(s->ctx->cipher_list_by_id);
 804                 }
 805         return(NULL);
 806         }
 807
 808 /** The old interface to get the same thing as SSL_get_ciphers() */
 809 const char *SSL_get_cipher_list(SSL *s,int n)
 810         {
 811         SSL_CIPHER *c;
 812         STACK_OF(SSL_CIPHER) *sk;
 813
 814         if (s == NULL) return(NULL);
 815         sk=SSL_get_ciphers(s);
 816         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
 817                 return(NULL);
 818         c=sk_SSL_CIPHER_value(sk,n);
 819         if (c == NULL) return(NULL);
 820         return(c->name);
 821         }
 822
 823 /** specify the ciphers to be used by defaut by the SSL_CTX */
 824 int SSL_CTX_set_cipher_list(SSL_CTX *ctx,char *str)
 825         {
 826         STACK_OF(SSL_CIPHER) *sk;
 827
 828         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
 829                 &ctx->cipher_list_by_id,str);
 830 /* XXXX */
 831         return((sk == NULL)?0:1);
 832         }
 833
 834 /** specify the ciphers to be used by the SSL */
 835 int SSL_set_cipher_list(SSL *s,char *str)
 836         {
 837         STACK_OF(SSL_CIPHER) *sk;
 838
 839         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
 840                 &s->cipher_list_by_id,str);
 841 /* XXXX */
 842         return((sk == NULL)?0:1);
 843         }
 844
 845 /* works well for SSLv2, not so good for SSLv3 */
 846 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
 847         {
 848         char *p;
 849         const char *cp;
 850         STACK_OF(SSL_CIPHER) *sk;
 851         SSL_CIPHER *c;
 852         int i;
 853
 854         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
 855                 (len < 2))
 856                 return(NULL);
 857
 858         p=buf;
 859         sk=s->session->ciphers;
 860         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 861                 {
 862                 /* Decrement for either the ':' or a '\0' */
 863                 len--;
 864                 c=sk_SSL_CIPHER_value(sk,i);
 865                 for (cp=c->name; *cp; )
 866                         {
 867                         if (len-- == 0)
 868                                 {
 869                                 *p='\0';
 870                                 return(buf);
 871                                 }
 872                         else
 873                                 *(p++)= *(cp++);
 874                         }
 875                 *(p++)=':';
 876                 }
 877         p[-1]='\0';
 878         return(buf);
 879         }
 880
 881 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
 882         {
 883         int i,j=0;
 884         SSL_CIPHER *c;
 885         unsigned char *q;
 886
 887         if (sk == NULL) return(0);
 888         q=p;
 889
 890         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 891                 {
 892                 c=sk_SSL_CIPHER_value(sk,i);
 893                 j=ssl_put_cipher_by_char(s,c,p);
 894                 p+=j;
 895                 }
 896         return(p-q);
 897         }
 898
 899 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
 900                                                STACK_OF(SSL_CIPHER) **skp)
 901         {
 902         SSL_CIPHER *c;
 903         STACK_OF(SSL_CIPHER) *sk;
 904         int i,n;
 905
 906         n=ssl_put_cipher_by_char(s,NULL,NULL);
 907         if ((num%n) != 0)
 908                 {
 909                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
 910                 return(NULL);
 911                 }
 912         if ((skp == NULL) || (*skp == NULL))
 913                 sk=sk_SSL_CIPHER_new(NULL); /* change perhaps later */
 914         else
 915                 {
 916                 sk= *skp;
 917                 sk_SSL_CIPHER_zero(sk);
 918                 }
 919
 920         for (i=0; i<num; i+=n)
 921                 {
 922                 c=ssl_get_cipher_by_char(s,p);
 923                 p+=n;
 924                 if (c != NULL)
 925                         {
 926                         if (!sk_SSL_CIPHER_push(sk,c))
 927                                 {
 928                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
 929                                 goto err;
 930                                 }
 931                         }
 932                 }
 933
 934         if (skp != NULL)
 935                 *skp=sk;
 936         return(sk);
 937 err:
 938         if ((skp == NULL) || (*skp == NULL))
 939                 sk_SSL_CIPHER_free(sk);
 940         return(NULL);
 941         }
 942
 943 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
 944         {
 945         unsigned long l;
 946
 947         l=(unsigned long)
 948                 ((unsigned int) a->session_id[0]     )|
 949                 ((unsigned int) a->session_id[1]<< 8L)|
 950                 ((unsigned long)a->session_id[2]<<16L)|
 951                 ((unsigned long)a->session_id[3]<<24L);
 952         return(l);
 953         }
 954
 955 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
 956         {
 957         if (a->ssl_version != b->ssl_version)
 958                 return(1);
 959         if (a->session_id_length != b->session_id_length)
 960                 return(1);
 961         return(memcmp(a->session_id,b->session_id,a->session_id_length));
 962         }
 963
 964 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
 965         {
 966         SSL_CTX *ret=NULL;
 967
 968         if (meth == NULL)
 969                 {
 970                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
 971                 return(NULL);
 972                 }
 973
 974         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
 975                 {
 976                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
 977                 goto err;
 978                 }
 979         ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
 980         if (ret == NULL)
 981                 goto err;
 982
 983         memset(ret,0,sizeof(SSL_CTX));
 984
 985         ret->method=meth;
 986
 987         ret->cert_store=NULL;
 988         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
 989         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
 990         ret->session_cache_head=NULL;
 991         ret->session_cache_tail=NULL;
 992
 993         /* We take the system default */
 994         ret->session_timeout=meth->get_timeout();
 995
 996         ret->new_session_cb=NULL;
 997         ret->remove_session_cb=NULL;
 998         ret->get_session_cb=NULL;
 999
1000         memset((char *)&ret->stats,0,sizeof(ret->stats));
1001
1002         ret->references=1;
1003         ret->quiet_shutdown=0;
1004
1005 /*      ret->cipher=NULL;*/
1006 /*      ret->s2->challenge=NULL;
1007         ret->master_key=NULL;
1008         ret->key_arg=NULL;
1009         ret->s2->conn_id=NULL; */
1010
1011         ret->info_callback=NULL;
1012
1013         ret->app_verify_callback=NULL;
1014         ret->app_verify_arg=NULL;
1015
1016         ret->read_ahead=0;
1017         ret->verify_mode=SSL_VERIFY_NONE;
1018         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1019         ret->default_verify_callback=NULL;
1020         if ((ret->cert=ssl_cert_new()) == NULL)
1021                 goto err;
1022
1023         ret->default_passwd_callback=NULL;
1024         ret->client_cert_cb=NULL;
1025
1026         ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
1027         if (ret->sessions == NULL) goto err;
1028         ret->cert_store=X509_STORE_new();
1029         if (ret->cert_store == NULL) goto err;
1030
1031         ssl_create_cipher_list(ret->method,
1032                 &ret->cipher_list,&ret->cipher_list_by_id,
1033                 SSL_DEFAULT_CIPHER_LIST);
1034         if (ret->cipher_list == NULL
1035             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1036                 {
1037                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1038                 goto err2;
1039                 }
1040
1041         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1042                 {
1043                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1044                 goto err2;
1045                 }
1046         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1047                 {
1048                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1049                 goto err2;
1050                 }
1051         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1052                 {
1053                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1054                 goto err2;
1055                 }
1056
1057         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1058                 goto err;
1059
1060         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
1061
1062         ret->extra_certs=NULL;
1063         ret->comp_methods=SSL_COMP_get_compression_methods();
1064
1065         return(ret);
1066 err:
1067         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1068 err2:
1069         if (ret != NULL) SSL_CTX_free(ret);
1070         return(NULL);
1071         }
1072
1073 static void SSL_COMP_free(SSL_COMP *comp)
1074     { Free(comp); }
1075
1076 void SSL_CTX_free(SSL_CTX *a)
1077         {
1078         int i;
1079
1080         if (a == NULL) return;
1081
1082         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1083 #ifdef REF_PRINT
1084         REF_PRINT("SSL_CTX",a);
1085 #endif
1086         if (i > 0) return;
1087 #ifdef REF_CHECK
1088         if (i < 0)
1089                 {
1090                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1091                 abort(); /* ok */
1092                 }
1093 #endif
1094         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1095
1096         if (a->sessions != NULL)
1097                 {
1098                 SSL_CTX_flush_sessions(a,0);
1099                 lh_free(a->sessions);
1100                 }
1101         if (a->cert_store != NULL)
1102                 X509_STORE_free(a->cert_store);
1103         if (a->cipher_list != NULL)
1104                 sk_SSL_CIPHER_free(a->cipher_list);
1105         if (a->cipher_list_by_id != NULL)
1106                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1107         if (a->cert != NULL)
1108                 ssl_cert_free(a->cert);
1109         if (a->client_CA != NULL)
1110                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1111         if (a->extra_certs != NULL)
1112                 sk_X509_pop_free(a->extra_certs,X509_free);
1113         if (a->comp_methods != NULL)
1114                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1115         Free((char *)a);
1116         }
1117
1118 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx,int (*cb)())
1119         {
1120         ctx->default_passwd_callback=cb;
1121         }
1122
1123 void SSL_CTX_set_cert_verify_cb(SSL_CTX *ctx,int (*cb)(),char *arg)
1124         {
1125         ctx->app_verify_callback=cb;
1126         ctx->app_verify_arg=arg;
1127         }
1128
1129 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1130         {
1131         ctx->verify_mode=mode;
1132         ctx->default_verify_callback=cb;
1133         /* This needs cleaning up EAY EAY EAY */
1134         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1135         }
1136
1137 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1138         {
1139         ctx->verify_depth=depth;
1140         }
1141
1142 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1143         {
1144         CERT_PKEY *cpk;
1145         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1146         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1147         int rsa_tmp_export,dh_tmp_export,kl;
1148         unsigned long mask,emask;
1149
1150         if (c == NULL) return;
1151
1152         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1153
1154 #ifndef NO_RSA
1155         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1156         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1157                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1158 #else
1159         rsa_tmp=rsa_tmp_export=0;
1160 #endif
1161 #ifndef NO_DH
1162         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1163         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1164                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1165 #else
1166         dh_tmp=dh_tmp_export=0;
1167 #endif
1168
1169         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1170         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1171         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1172         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1173         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1174         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1175         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1176         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1177         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1178         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1179         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1180 /* FIX THIS EAY EAY EAY */
1181         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1182         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1183
1184         mask=0;
1185         emask=0;
1186
1187 #ifdef CIPHER_DEBUG
1188         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1189                 rsa_tmp,rsa_tmp_export,dh_tmp,
1190                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1191 #endif
1192
1193         if (rsa_enc || (rsa_tmp && rsa_sign))
1194                 mask|=SSL_kRSA;
1195         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1196                 emask|=SSL_kRSA;
1197
1198 #if 0
1199         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1200         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1201                 (rsa_enc || rsa_sign || dsa_sign))
1202                 mask|=SSL_kEDH;
1203         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1204                 (rsa_enc || rsa_sign || dsa_sign))
1205                 emask|=SSL_kEDH;
1206 #endif
1207
1208         if (dh_tmp_export)
1209                 emask|=SSL_kEDH;
1210
1211         if (dh_tmp)
1212                 mask|=SSL_kEDH;
1213
1214         if (dh_rsa) mask|=SSL_kDHr;
1215         if (dh_rsa_export) emask|=SSL_kDHr;
1216
1217         if (dh_dsa) mask|=SSL_kDHd;
1218         if (dh_dsa_export) emask|=SSL_kDHd;
1219
1220         if (rsa_enc || rsa_sign)
1221                 {
1222                 mask|=SSL_aRSA;
1223                 emask|=SSL_aRSA;
1224                 }
1225
1226         if (dsa_sign)
1227                 {
1228                 mask|=SSL_aDSS;
1229                 emask|=SSL_aDSS;
1230                 }
1231
1232 #ifdef SSL_ALLOW_ADH
1233         mask|=SSL_aNULL;
1234         emask|=SSL_aNULL;
1235 #endif
1236
1237         c->mask=mask;
1238         c->export_mask=emask;
1239         c->valid=1;
1240         }
1241
1242 /* THIS NEEDS CLEANING UP */
1243 X509 *ssl_get_server_send_cert(SSL *s)
1244         {
1245         unsigned long alg,mask,kalg;
1246         CERT *c;
1247         int i,export;
1248
1249         c=s->cert;
1250         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1251         alg=s->s3->tmp.new_cipher->algorithms;
1252         export=SSL_IS_EXPORT(alg);
1253         mask=export?c->export_mask:c->mask;
1254         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1255
1256         if      (kalg & SSL_kDHr)
1257                 i=SSL_PKEY_DH_RSA;
1258         else if (kalg & SSL_kDHd)
1259                 i=SSL_PKEY_DH_DSA;
1260         else if (kalg & SSL_aDSS)
1261                 i=SSL_PKEY_DSA_SIGN;
1262         else if (kalg & SSL_aRSA)
1263                 {
1264                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1265                         i=SSL_PKEY_RSA_SIGN;
1266                 else
1267                         i=SSL_PKEY_RSA_ENC;
1268                 }
1269         else /* if (kalg & SSL_aNULL) */
1270                 {
1271                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1272                 return(NULL);
1273                 }
1274         if (c->pkeys[i].x509 == NULL) return(NULL);
1275         return(c->pkeys[i].x509);
1276         }
1277
1278 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1279         {
1280         unsigned long alg;
1281         CERT *c;
1282
1283         alg=cipher->algorithms;
1284         c=s->cert;
1285
1286         if ((alg & SSL_aDSS) &&
1287                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1288                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1289         else if (alg & SSL_aRSA)
1290                 {
1291                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1292                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1293                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1294                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1295                 else
1296                         return(NULL);
1297                 }
1298         else /* if (alg & SSL_aNULL) */
1299                 {
1300                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1301                 return(NULL);
1302                 }
1303         }
1304
1305 void ssl_update_cache(SSL *s,int mode)
1306         {
1307         int i;
1308
1309         /* If the session_id_length is 0, we are not supposed to cache it,
1310          * and it would be rather hard to do anyway :-) */
1311         if (s->session->session_id_length == 0) return;
1312
1313         if ((s->ctx->session_cache_mode & mode)
1314                 && (!s->hit)
1315                 && SSL_CTX_add_session(s->ctx,s->session)
1316                 && (s->ctx->new_session_cb != NULL))
1317                 {
1318                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1319                 if (!s->ctx->new_session_cb(s,s->session))
1320                         SSL_SESSION_free(s->session);
1321                 }
1322
1323         /* auto flush every 255 connections */
1324         i=s->ctx->session_cache_mode;
1325         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1326                 ((i & mode) == mode))
1327                 {
1328                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1329                         ?s->ctx->stats.sess_connect_good
1330                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1331                         {
1332                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1333                         }
1334                 }
1335         }
1336
1337 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1338         {
1339         return(s->method);
1340         }
1341
1342 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1343         {
1344         int conn= -1;
1345         int ret=1;
1346
1347         if (s->method != meth)
1348                 {
1349                 if (s->handshake_func != NULL)
1350                         conn=(s->handshake_func == s->method->ssl_connect);
1351
1352                 if (s->method->version == meth->version)
1353                         s->method=meth;
1354                 else
1355                         {
1356                         s->method->ssl_free(s);
1357                         s->method=meth;
1358                         ret=s->method->ssl_new(s);
1359                         }
1360
1361                 if (conn == 1)
1362                         s->handshake_func=meth->ssl_connect;
1363                 else if (conn == 0)
1364                         s->handshake_func=meth->ssl_accept;
1365                 }
1366         return(ret);
1367         }
1368
1369 int SSL_get_error(SSL *s,int i)
1370         {
1371         int reason;
1372         unsigned long l;
1373         BIO *bio;
1374
1375         if (i > 0) return(SSL_ERROR_NONE);
1376
1377         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1378          * etc, where we do encode the error */
1379         if ((l=ERR_peek_error()) != 0)
1380                 {
1381                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1382                         return(SSL_ERROR_SYSCALL);
1383                 else
1384                         return(SSL_ERROR_SSL);
1385                 }
1386
1387         if ((i < 0) && SSL_want_read(s))
1388                 {
1389                 bio=SSL_get_rbio(s);
1390                 if (BIO_should_read(bio))
1391                         return(SSL_ERROR_WANT_READ);
1392                 else if (BIO_should_write(bio))
1393                         return(SSL_ERROR_WANT_WRITE);
1394                 else if (BIO_should_io_special(bio))
1395                         {
1396                         reason=BIO_get_retry_reason(bio);
1397                         if (reason == BIO_RR_CONNECT)
1398                                 return(SSL_ERROR_WANT_CONNECT);
1399                         else
1400                                 return(SSL_ERROR_SYSCALL); /* unknown */
1401                         }
1402                 }
1403
1404         if ((i < 0) && SSL_want_write(s))
1405                 {
1406                 bio=SSL_get_wbio(s);
1407                 if (BIO_should_write(bio))
1408                         return(SSL_ERROR_WANT_WRITE);
1409                 else if (BIO_should_read(bio))
1410                         return(SSL_ERROR_WANT_READ);
1411                 else if (BIO_should_io_special(bio))
1412                         {
1413                         reason=BIO_get_retry_reason(bio);
1414                         if (reason == BIO_RR_CONNECT)
1415                                 return(SSL_ERROR_WANT_CONNECT);
1416                         else
1417                                 return(SSL_ERROR_SYSCALL);
1418                         }
1419                 }
1420         if ((i < 0) && SSL_want_x509_lookup(s))
1421                 {
1422                 return(SSL_ERROR_WANT_X509_LOOKUP);
1423                 }
1424
1425         if (i == 0)
1426                 {
1427                 if (s->version == SSL2_VERSION)
1428                         {
1429                         /* assume it is the socket being closed */
1430                         return(SSL_ERROR_ZERO_RETURN);
1431                         }
1432                 else
1433                         {
1434                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1435                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1436                                 return(SSL_ERROR_ZERO_RETURN);
1437                         }
1438                 }
1439         return(SSL_ERROR_SYSCALL);
1440         }
1441
1442 int SSL_do_handshake(SSL *s)
1443         {
1444         int ret=1;
1445
1446         if (s->handshake_func == NULL)
1447                 {
1448                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1449                 return(-1);
1450                 }
1451
1452         s->method->ssl_renegotiate_check(s);
1453
1454         if (SSL_in_init(s) || SSL_in_before(s))
1455                 {
1456                 ret=s->handshake_func(s);
1457                 }
1458         return(ret);
1459         }
1460
1461 /* For the next 2 functions, SSL_clear() sets shutdown and so
1462  * one of these calls will reset it */
1463 void SSL_set_accept_state(SSL *s)
1464         {
1465         s->server=1;
1466         s->shutdown=0;
1467         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1468         s->handshake_func=s->method->ssl_accept;
1469         /* clear the current cipher */
1470         ssl_clear_cipher_ctx(s);
1471         }
1472
1473 void SSL_set_connect_state(SSL *s)
1474         {
1475         s->server=0;
1476         s->shutdown=0;
1477         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1478         s->handshake_func=s->method->ssl_connect;
1479         /* clear the current cipher */
1480         ssl_clear_cipher_ctx(s);
1481         }
1482
1483 int ssl_undefined_function(SSL *s)
1484         {
1485         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1486         return(0);
1487         }
1488
1489 SSL_METHOD *ssl_bad_method(int ver)
1490         {
1491         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1492         return(NULL);
1493         }
1494
1495 char *SSL_get_version(SSL *s)
1496         {
1497         if (s->version == TLS1_VERSION)
1498                 return("TLSv1");
1499         else if (s->version == SSL3_VERSION)
1500                 return("SSLv3");
1501         else if (s->version == SSL2_VERSION)
1502                 return("SSLv2");
1503         else
1504                 return("unknown");
1505         }
1506
1507 SSL *SSL_dup(SSL *s)
1508         {
1509         STACK_OF(X509_NAME) *sk;
1510         X509_NAME *xn;
1511         SSL *ret;
1512         int i;
1513
1514         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
1515             return(NULL);
1516
1517         if (s->session != NULL)
1518                 {
1519                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
1520                 SSL_copy_session_id(ret,s);
1521                 }
1522         else
1523                 {
1524                 /* No session has been established yet, so we have to expect
1525                  * that s->cert or ret->cert will be changed later --
1526                  * they should not both point to the same object,
1527                  * and thus we can't use SSL_copy_session_id. */
1528
1529                 ret->method = s->method;
1530                 ret->method->ssl_new(ret);
1531
1532                 if (s->cert != NULL)
1533                         {
1534                         ret->cert = ssl_cert_dup(s->cert);
1535                         if (ret->cert == NULL)
1536                                 goto err;
1537                         }
1538
1539                 SSL_set_session_id_context(ret,
1540                         s->sid_ctx, s->sid_ctx_length);
1541                 }
1542
1543         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1544         SSL_set_verify(ret,SSL_get_verify_mode(s),
1545                 SSL_get_verify_callback(s));
1546         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
1547
1548         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1549
1550         ret->debug=s->debug;
1551         ret->options=s->options;
1552
1553         /* copy app data, a little dangerous perhaps */
1554         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1555                 goto err;
1556
1557         /* setup rbio, and wbio */
1558         if (s->rbio != NULL)
1559                 {
1560                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1561                         goto err;
1562                 }
1563         if (s->wbio != NULL)
1564                 {
1565                 if (s->wbio != s->rbio)
1566                         {
1567                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1568                                 goto err;
1569                         }
1570                 else
1571                         ret->wbio=ret->rbio;
1572                 }
1573
1574         /* dup the cipher_list and cipher_list_by_id stacks */
1575         if (s->cipher_list != NULL)
1576                 {
1577                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
1578                         goto err;
1579                 }
1580         if (s->cipher_list_by_id != NULL)
1581                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
1582                         == NULL)
1583                         goto err;
1584
1585         /* Dup the client_CA list */
1586         if (s->client_CA != NULL)
1587                 {
1588                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
1589                 ret->client_CA=sk;
1590                 for (i=0; i<sk_X509_NAME_num(sk); i++)
1591                         {
1592                         xn=sk_X509_NAME_value(sk,i);
1593                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
1594                                 {
1595                                 X509_NAME_free(xn);
1596                                 goto err;
1597                                 }
1598                         }
1599                 }
1600
1601         ret->shutdown=s->shutdown;
1602         ret->state=s->state;
1603         ret->handshake_func=s->handshake_func;
1604         ret->server=s->server;
1605
1606         if (0)
1607                 {
1608 err:
1609                 if (ret != NULL) SSL_free(ret);
1610                 ret=NULL;
1611                 }
1612         return(ret);
1613         }
1614
1615 void ssl_clear_cipher_ctx(SSL *s)
1616         {
1617         if (s->enc_read_ctx != NULL)
1618                 {
1619                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1620                 Free(s->enc_read_ctx);
1621                 s->enc_read_ctx=NULL;
1622                 }
1623         if (s->enc_write_ctx != NULL)
1624                 {
1625                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1626                 Free(s->enc_write_ctx);
1627                 s->enc_write_ctx=NULL;
1628                 }
1629         if (s->expand != NULL)
1630                 {
1631                 COMP_CTX_free(s->expand);
1632                 s->expand=NULL;
1633                 }
1634         if (s->compress != NULL)
1635                 {
1636                 COMP_CTX_free(s->compress);
1637                 s->compress=NULL;
1638                 }
1639         }
1640
1641 /* Fix this function so that it takes an optional type parameter */
1642 X509 *SSL_get_certificate(SSL *s)
1643         {
1644         if (s->cert != NULL)
1645                 return(s->cert->key->x509);
1646         else
1647                 return(NULL);
1648         }
1649
1650 /* Fix this function so that it takes an optional type parameter */
1651 EVP_PKEY *SSL_get_privatekey(SSL *s)
1652         {
1653         if (s->cert != NULL)
1654                 return(s->cert->key->privatekey);
1655         else
1656                 return(NULL);
1657         }
1658
1659 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1660         {
1661         if ((s->session != NULL) && (s->session->cipher != NULL))
1662                 return(s->session->cipher);
1663         return(NULL);
1664         }
1665
1666 int ssl_init_wbio_buffer(SSL *s,int push)
1667         {
1668         BIO *bbio;
1669
1670         if (s->bbio == NULL)
1671                 {
1672                 bbio=BIO_new(BIO_f_buffer());
1673                 if (bbio == NULL) return(0);
1674                 s->bbio=bbio;
1675                 }
1676         else
1677                 {
1678                 bbio=s->bbio;
1679                 if (s->bbio == s->wbio)
1680                         s->wbio=BIO_pop(s->wbio);
1681                 }
1682         BIO_reset(bbio);
1683 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1684         if (!BIO_set_read_buffer_size(bbio,1))
1685                 {
1686                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1687                 return(0);
1688                 }
1689         if (push)
1690                 {
1691                 if (s->wbio != bbio)
1692                         s->wbio=BIO_push(bbio,s->wbio);
1693                 }
1694         else
1695                 {
1696                 if (s->wbio == bbio)
1697                         s->wbio=BIO_pop(bbio);
1698                 }
1699         return(1);
1700         }
1701
1702 void ssl_free_wbio_buffer(SSL *s)
1703         {
1704         BIO *under;
1705
1706         if (s->bbio == NULL) return;
1707
1708         if (s->bbio == s->wbio)
1709                 {
1710                 /* remove buffering */
1711                 under=BIO_pop(s->wbio);
1712                 if (under != NULL)
1713                         s->wbio=under;
1714                 else
1715                         abort(); /* ok */
1716                 }
1717         BIO_free(s->bbio);
1718         s->bbio=NULL;
1719         }
1720
1721 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1722         {
1723         ctx->quiet_shutdown=mode;
1724         }
1725
1726 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1727         {
1728         return(ctx->quiet_shutdown);
1729         }
1730
1731 void SSL_set_quiet_shutdown(SSL *s,int mode)
1732         {
1733         s->quiet_shutdown=mode;
1734         }
1735
1736 int SSL_get_quiet_shutdown(SSL *s)
1737         {
1738         return(s->quiet_shutdown);
1739         }
1740
1741 void SSL_set_shutdown(SSL *s,int mode)
1742         {
1743         s->shutdown=mode;
1744         }
1745
1746 int SSL_get_shutdown(SSL *s)
1747         {
1748         return(s->shutdown);
1749         }
1750
1751 int SSL_version(SSL *s)
1752         {
1753         return(s->version);
1754         }
1755
1756 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1757         {
1758         return(ssl->ctx);
1759         }
1760
1761 #ifndef NO_STDIO
1762 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1763         {
1764         return(X509_STORE_set_default_paths(ctx->cert_store));
1765         }
1766
1767 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
1768                 const char *CApath)
1769         {
1770         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
1771         }
1772 #endif
1773
1774 void SSL_set_info_callback(SSL *ssl,void (*cb)())
1775         {
1776         ssl->info_callback=cb;
1777         }
1778
1779 void (*SSL_get_info_callback(SSL *ssl))(void)
1780         {
1781         return((void (*)())ssl->info_callback);
1782         }
1783
1784 int SSL_state(SSL *ssl)
1785         {
1786         return(ssl->state);
1787         }
1788
1789 void SSL_set_verify_result(SSL *ssl,long arg)
1790         {
1791         ssl->verify_result=arg;
1792         }
1793
1794 long SSL_get_verify_result(SSL *ssl)
1795         {
1796         return(ssl->verify_result);
1797         }
1798
1799 int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1800                          int (*dup_func)(),void (*free_func)())
1801         {
1802         ssl_meth_num++;
1803         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
1804                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
1805         }
1806
1807 int SSL_set_ex_data(SSL *s,int idx,void *arg)
1808         {
1809         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1810         }
1811
1812 void *SSL_get_ex_data(SSL *s,int idx)
1813         {
1814         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1815         }
1816
1817 int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1818                              int (*dup_func)(),void (*free_func)())
1819         {
1820         ssl_ctx_meth_num++;
1821         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
1822                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
1823         }
1824
1825 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
1826         {
1827         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1828         }
1829
1830 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
1831         {
1832         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1833         }
1834
1835 int ssl_ok(SSL *s)
1836         {
1837         return(1);
1838         }
1839
1840 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
1841         {
1842         return(ctx->cert_store);
1843         }
1844
1845 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
1846         {
1847         if (ctx->cert_store != NULL)
1848                 X509_STORE_free(ctx->cert_store);
1849         ctx->cert_store=store;
1850         }
1851
1852 int SSL_want(SSL *s)
1853         {
1854         return(s->rwstate);
1855         }
1856
1857 /*!
1858  * \brief Set the callback for generating temporary RSA keys.
1859  * \param ctx the SSL context.
1860  * \param cb the callback
1861  */
1862
1863 #ifndef NO_RSA
1864 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,int export,
1865                                                           int keylength))
1866     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1867 #endif
1868
1869 #ifndef NO_RSA
1870 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
1871                                                           int keylength))
1872     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1873 #endif
1874
1875 #ifdef DOXYGEN
1876 /*!
1877  * \brief The RSA temporary key callback function.
1878  * \param ssl the SSL session.
1879  * \param export \c TRUE if the temp RSA key is for an export ciphersuite.
1880  * \param keylength if \c export is \c TRUE, then \c keylength is the size of
1881  * the required key in bits.
1882  * \return the temporary RSA key.
1883  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
1884  */
1885
1886 RSA *cb(SSL *ssl,int export,int keylength)
1887     {}
1888 #endif
1889
1890 /*!
1891  * \brief Set the callback for generating temporary DH keys.
1892  * \param ctx the SSL context.
1893  * \param dh the callback
1894  */
1895
1896 #ifndef NO_DH
1897 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int export,
1898                                                         int keylength))
1899     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1900
1901 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int export,
1902                                                         int keylength))
1903     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1904 #endif
1905
1906 #if defined(_WINDLL) && defined(WIN16)
1907 #include "../crypto/bio/bss_file.c"
1908 #endif
1909
1910 IMPLEMENT_STACK_OF(SSL_CIPHER)
1911 IMPLEMENT_STACK_OF(SSL_COMP)