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 OPENSSL_GLOBAL 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         /* Note that this function behaves differently from what one might
 661          * expect.  Return values are 0 for no success (yet),
 662          * 1 for success; but calling it once is usually not enough,
 663          * even if blocking I/O is used (see ssl3_shutdown).
 664          */
 665
 666         if (s->handshake_func == 0)
 667                 {
 668                 SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
 669                 return -1;
 670                 }
 671
 672         if ((s != NULL) && !SSL_in_init(s))
 673                 return(s->method->ssl_shutdown(s));
 674         else
 675                 return(1);
 676         }
 677
 678 int SSL_renegotiate(SSL *s)
 679         {
 680         s->new_session=1;
 681         return(s->method->ssl_renegotiate(s));
 682         }
 683
 684 long SSL_ctrl(SSL *s,int cmd,long larg,char *parg)
 685         {
 686         long l;
 687
 688         switch (cmd)
 689                 {
 690         case SSL_CTRL_GET_READ_AHEAD:
 691                 return(s->read_ahead);
 692         case SSL_CTRL_SET_READ_AHEAD:
 693                 l=s->read_ahead;
 694                 s->read_ahead=larg;
 695                 return(l);
 696         case SSL_CTRL_OPTIONS:
 697                 return(s->options|=larg);
 698         default:
 699                 return(s->method->ssl_ctrl(s,cmd,larg,parg));
 700                 }
 701         }
 702
 703 long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,char *parg)
 704         {
 705         long l;
 706
 707         switch (cmd)
 708                 {
 709         case SSL_CTRL_GET_READ_AHEAD:
 710                 return(ctx->read_ahead);
 711         case SSL_CTRL_SET_READ_AHEAD:
 712                 l=ctx->read_ahead;
 713                 ctx->read_ahead=larg;
 714                 return(l);
 715
 716         case SSL_CTRL_SET_SESS_CACHE_SIZE:
 717                 l=ctx->session_cache_size;
 718                 ctx->session_cache_size=larg;
 719                 return(l);
 720         case SSL_CTRL_GET_SESS_CACHE_SIZE:
 721                 return(ctx->session_cache_size);
 722         case SSL_CTRL_SET_SESS_CACHE_MODE:
 723                 l=ctx->session_cache_mode;
 724                 ctx->session_cache_mode=larg;
 725                 return(l);
 726         case SSL_CTRL_GET_SESS_CACHE_MODE:
 727                 return(ctx->session_cache_mode);
 728
 729         case SSL_CTRL_SESS_NUMBER:
 730                 return(ctx->sessions->num_items);
 731         case SSL_CTRL_SESS_CONNECT:
 732                 return(ctx->stats.sess_connect);
 733         case SSL_CTRL_SESS_CONNECT_GOOD:
 734                 return(ctx->stats.sess_connect_good);
 735         case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
 736                 return(ctx->stats.sess_connect_renegotiate);
 737         case SSL_CTRL_SESS_ACCEPT:
 738                 return(ctx->stats.sess_accept);
 739         case SSL_CTRL_SESS_ACCEPT_GOOD:
 740                 return(ctx->stats.sess_accept_good);
 741         case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
 742                 return(ctx->stats.sess_accept_renegotiate);
 743         case SSL_CTRL_SESS_HIT:
 744                 return(ctx->stats.sess_hit);
 745         case SSL_CTRL_SESS_CB_HIT:
 746                 return(ctx->stats.sess_cb_hit);
 747         case SSL_CTRL_SESS_MISSES:
 748                 return(ctx->stats.sess_miss);
 749         case SSL_CTRL_SESS_TIMEOUTS:
 750                 return(ctx->stats.sess_timeout);
 751         case SSL_CTRL_SESS_CACHE_FULL:
 752                 return(ctx->stats.sess_cache_full);
 753         case SSL_CTRL_OPTIONS:
 754                 return(ctx->options|=larg);
 755         default:
 756                 return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
 757                 }
 758         }
 759
 760 int ssl_cipher_id_cmp(SSL_CIPHER *a,SSL_CIPHER *b)
 761         {
 762         long l;
 763
 764         l=a->id-b->id;
 765         if (l == 0L)
 766                 return(0);
 767         else
 768                 return((l > 0)?1:-1);
 769         }
 770
 771 int ssl_cipher_ptr_id_cmp(SSL_CIPHER **ap,SSL_CIPHER **bp)
 772         {
 773         long l;
 774
 775         l=(*ap)->id-(*bp)->id;
 776         if (l == 0L)
 777                 return(0);
 778         else
 779                 return((l > 0)?1:-1);
 780         }
 781
 782 /** return a STACK of the ciphers available for the SSL and in order of
 783  * preference */
 784 STACK_OF(SSL_CIPHER) *SSL_get_ciphers(SSL *s)
 785         {
 786         if ((s != NULL) && (s->cipher_list != NULL))
 787                 {
 788                 return(s->cipher_list);
 789                 }
 790         else if ((s->ctx != NULL) &&
 791                 (s->ctx->cipher_list != NULL))
 792                 {
 793                 return(s->ctx->cipher_list);
 794                 }
 795         return(NULL);
 796         }
 797
 798 /** return a STACK of the ciphers available for the SSL and in order of
 799  * algorithm id */
 800 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
 801         {
 802         if ((s != NULL) && (s->cipher_list_by_id != NULL))
 803                 {
 804                 return(s->cipher_list_by_id);
 805                 }
 806         else if ((s != NULL) && (s->ctx != NULL) &&
 807                 (s->ctx->cipher_list_by_id != NULL))
 808                 {
 809                 return(s->ctx->cipher_list_by_id);
 810                 }
 811         return(NULL);
 812         }
 813
 814 /** The old interface to get the same thing as SSL_get_ciphers() */
 815 const char *SSL_get_cipher_list(SSL *s,int n)
 816         {
 817         SSL_CIPHER *c;
 818         STACK_OF(SSL_CIPHER) *sk;
 819
 820         if (s == NULL) return(NULL);
 821         sk=SSL_get_ciphers(s);
 822         if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
 823                 return(NULL);
 824         c=sk_SSL_CIPHER_value(sk,n);
 825         if (c == NULL) return(NULL);
 826         return(c->name);
 827         }
 828
 829 /** specify the ciphers to be used by defaut by the SSL_CTX */
 830 int SSL_CTX_set_cipher_list(SSL_CTX *ctx,char *str)
 831         {
 832         STACK_OF(SSL_CIPHER) *sk;
 833
 834         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
 835                 &ctx->cipher_list_by_id,str);
 836 /* XXXX */
 837         return((sk == NULL)?0:1);
 838         }
 839
 840 /** specify the ciphers to be used by the SSL */
 841 int SSL_set_cipher_list(SSL *s,char *str)
 842         {
 843         STACK_OF(SSL_CIPHER) *sk;
 844
 845         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
 846                 &s->cipher_list_by_id,str);
 847 /* XXXX */
 848         return((sk == NULL)?0:1);
 849         }
 850
 851 /* works well for SSLv2, not so good for SSLv3 */
 852 char *SSL_get_shared_ciphers(SSL *s,char *buf,int len)
 853         {
 854         char *p;
 855         const char *cp;
 856         STACK_OF(SSL_CIPHER) *sk;
 857         SSL_CIPHER *c;
 858         int i;
 859
 860         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
 861                 (len < 2))
 862                 return(NULL);
 863
 864         p=buf;
 865         sk=s->session->ciphers;
 866         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 867                 {
 868                 /* Decrement for either the ':' or a '\0' */
 869                 len--;
 870                 c=sk_SSL_CIPHER_value(sk,i);
 871                 for (cp=c->name; *cp; )
 872                         {
 873                         if (len-- == 0)
 874                                 {
 875                                 *p='\0';
 876                                 return(buf);
 877                                 }
 878                         else
 879                                 *(p++)= *(cp++);
 880                         }
 881                 *(p++)=':';
 882                 }
 883         p[-1]='\0';
 884         return(buf);
 885         }
 886
 887 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p)
 888         {
 889         int i,j=0;
 890         SSL_CIPHER *c;
 891         unsigned char *q;
 892
 893         if (sk == NULL) return(0);
 894         q=p;
 895
 896         for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
 897                 {
 898                 c=sk_SSL_CIPHER_value(sk,i);
 899                 j=ssl_put_cipher_by_char(s,c,p);
 900                 p+=j;
 901                 }
 902         return(p-q);
 903         }
 904
 905 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
 906                                                STACK_OF(SSL_CIPHER) **skp)
 907         {
 908         SSL_CIPHER *c;
 909         STACK_OF(SSL_CIPHER) *sk;
 910         int i,n;
 911
 912         n=ssl_put_cipher_by_char(s,NULL,NULL);
 913         if ((num%n) != 0)
 914                 {
 915                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
 916                 return(NULL);
 917                 }
 918         if ((skp == NULL) || (*skp == NULL))
 919                 sk=sk_SSL_CIPHER_new(NULL); /* change perhaps later */
 920         else
 921                 {
 922                 sk= *skp;
 923                 sk_SSL_CIPHER_zero(sk);
 924                 }
 925
 926         for (i=0; i<num; i+=n)
 927                 {
 928                 c=ssl_get_cipher_by_char(s,p);
 929                 p+=n;
 930                 if (c != NULL)
 931                         {
 932                         if (!sk_SSL_CIPHER_push(sk,c))
 933                                 {
 934                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
 935                                 goto err;
 936                                 }
 937                         }
 938                 }
 939
 940         if (skp != NULL)
 941                 *skp=sk;
 942         return(sk);
 943 err:
 944         if ((skp == NULL) || (*skp == NULL))
 945                 sk_SSL_CIPHER_free(sk);
 946         return(NULL);
 947         }
 948
 949 unsigned long SSL_SESSION_hash(SSL_SESSION *a)
 950         {
 951         unsigned long l;
 952
 953         l=(unsigned long)
 954                 ((unsigned int) a->session_id[0]     )|
 955                 ((unsigned int) a->session_id[1]<< 8L)|
 956                 ((unsigned long)a->session_id[2]<<16L)|
 957                 ((unsigned long)a->session_id[3]<<24L);
 958         return(l);
 959         }
 960
 961 int SSL_SESSION_cmp(SSL_SESSION *a,SSL_SESSION *b)
 962         {
 963         if (a->ssl_version != b->ssl_version)
 964                 return(1);
 965         if (a->session_id_length != b->session_id_length)
 966                 return(1);
 967         return(memcmp(a->session_id,b->session_id,a->session_id_length));
 968         }
 969
 970 SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)
 971         {
 972         SSL_CTX *ret=NULL;
 973
 974         if (meth == NULL)
 975                 {
 976                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
 977                 return(NULL);
 978                 }
 979
 980         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
 981                 {
 982                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
 983                 goto err;
 984                 }
 985         ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
 986         if (ret == NULL)
 987                 goto err;
 988
 989         memset(ret,0,sizeof(SSL_CTX));
 990
 991         ret->method=meth;
 992
 993         ret->cert_store=NULL;
 994         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
 995         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
 996         ret->session_cache_head=NULL;
 997         ret->session_cache_tail=NULL;
 998
 999         /* We take the system default */
1000         ret->session_timeout=meth->get_timeout();
1001
1002         ret->new_session_cb=NULL;
1003         ret->remove_session_cb=NULL;
1004         ret->get_session_cb=NULL;
1005
1006         memset((char *)&ret->stats,0,sizeof(ret->stats));
1007
1008         ret->references=1;
1009         ret->quiet_shutdown=0;
1010
1011 /*      ret->cipher=NULL;*/
1012 /*      ret->s2->challenge=NULL;
1013         ret->master_key=NULL;
1014         ret->key_arg=NULL;
1015         ret->s2->conn_id=NULL; */
1016
1017         ret->info_callback=NULL;
1018
1019         ret->app_verify_callback=NULL;
1020         ret->app_verify_arg=NULL;
1021
1022         ret->read_ahead=0;
1023         ret->verify_mode=SSL_VERIFY_NONE;
1024         ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
1025         ret->default_verify_callback=NULL;
1026         if ((ret->cert=ssl_cert_new()) == NULL)
1027                 goto err;
1028
1029         ret->default_passwd_callback=NULL;
1030         ret->client_cert_cb=NULL;
1031
1032         ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
1033         if (ret->sessions == NULL) goto err;
1034         ret->cert_store=X509_STORE_new();
1035         if (ret->cert_store == NULL) goto err;
1036
1037         ssl_create_cipher_list(ret->method,
1038                 &ret->cipher_list,&ret->cipher_list_by_id,
1039                 SSL_DEFAULT_CIPHER_LIST);
1040         if (ret->cipher_list == NULL
1041             || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
1042                 {
1043                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
1044                 goto err2;
1045                 }
1046
1047         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
1048                 {
1049                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
1050                 goto err2;
1051                 }
1052         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
1053                 {
1054                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
1055                 goto err2;
1056                 }
1057         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
1058                 {
1059                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
1060                 goto err2;
1061                 }
1062
1063         if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
1064                 goto err;
1065
1066         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
1067
1068         ret->extra_certs=NULL;
1069         ret->comp_methods=SSL_COMP_get_compression_methods();
1070
1071         return(ret);
1072 err:
1073         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
1074 err2:
1075         if (ret != NULL) SSL_CTX_free(ret);
1076         return(NULL);
1077         }
1078
1079 static void SSL_COMP_free(SSL_COMP *comp)
1080     { Free(comp); }
1081
1082 void SSL_CTX_free(SSL_CTX *a)
1083         {
1084         int i;
1085
1086         if (a == NULL) return;
1087
1088         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
1089 #ifdef REF_PRINT
1090         REF_PRINT("SSL_CTX",a);
1091 #endif
1092         if (i > 0) return;
1093 #ifdef REF_CHECK
1094         if (i < 0)
1095                 {
1096                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
1097                 abort(); /* ok */
1098                 }
1099 #endif
1100         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1101
1102         if (a->sessions != NULL)
1103                 {
1104                 SSL_CTX_flush_sessions(a,0);
1105                 lh_free(a->sessions);
1106                 }
1107         if (a->cert_store != NULL)
1108                 X509_STORE_free(a->cert_store);
1109         if (a->cipher_list != NULL)
1110                 sk_SSL_CIPHER_free(a->cipher_list);
1111         if (a->cipher_list_by_id != NULL)
1112                 sk_SSL_CIPHER_free(a->cipher_list_by_id);
1113         if (a->cert != NULL)
1114                 ssl_cert_free(a->cert);
1115         if (a->client_CA != NULL)
1116                 sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
1117         if (a->extra_certs != NULL)
1118                 sk_X509_pop_free(a->extra_certs,X509_free);
1119         if (a->comp_methods != NULL)
1120                 sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
1121         Free((char *)a);
1122         }
1123
1124 void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
1125         {
1126         ctx->default_passwd_callback=cb;
1127         }
1128
1129 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,int (*cb)(),char *arg)
1130         {
1131         ctx->app_verify_callback=cb;
1132         ctx->app_verify_arg=arg;
1133         }
1134
1135 void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
1136         {
1137         ctx->verify_mode=mode;
1138         ctx->default_verify_callback=cb;
1139         /* This needs cleaning up EAY EAY EAY */
1140         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1141         }
1142
1143 void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
1144         {
1145         ctx->verify_depth=depth;
1146         }
1147
1148 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)
1149         {
1150         CERT_PKEY *cpk;
1151         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1152         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1153         int rsa_tmp_export,dh_tmp_export,kl;
1154         unsigned long mask,emask;
1155
1156         if (c == NULL) return;
1157
1158         kl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1159
1160 #ifndef NO_RSA
1161         rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
1162         rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
1163                 (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
1164 #else
1165         rsa_tmp=rsa_tmp_export=0;
1166 #endif
1167 #ifndef NO_DH
1168         dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
1169         dh_tmp_export=(c->dh_tmp_cb != NULL ||
1170                 (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
1171 #else
1172         dh_tmp=dh_tmp_export=0;
1173 #endif
1174
1175         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1176         rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
1177         rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1178         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1179         rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1180         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1181         dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
1182         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1183         dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1184         dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1185         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1186 /* FIX THIS EAY EAY EAY */
1187         dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
1188         dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
1189
1190         mask=0;
1191         emask=0;
1192
1193 #ifdef CIPHER_DEBUG
1194         printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1195                 rsa_tmp,rsa_tmp_export,dh_tmp,
1196                 rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1197 #endif
1198
1199         if (rsa_enc || (rsa_tmp && rsa_sign))
1200                 mask|=SSL_kRSA;
1201         if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
1202                 emask|=SSL_kRSA;
1203
1204 #if 0
1205         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1206         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1207                 (rsa_enc || rsa_sign || dsa_sign))
1208                 mask|=SSL_kEDH;
1209         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1210                 (rsa_enc || rsa_sign || dsa_sign))
1211                 emask|=SSL_kEDH;
1212 #endif
1213
1214         if (dh_tmp_export)
1215                 emask|=SSL_kEDH;
1216
1217         if (dh_tmp)
1218                 mask|=SSL_kEDH;
1219
1220         if (dh_rsa) mask|=SSL_kDHr;
1221         if (dh_rsa_export) emask|=SSL_kDHr;
1222
1223         if (dh_dsa) mask|=SSL_kDHd;
1224         if (dh_dsa_export) emask|=SSL_kDHd;
1225
1226         if (rsa_enc || rsa_sign)
1227                 {
1228                 mask|=SSL_aRSA;
1229                 emask|=SSL_aRSA;
1230                 }
1231
1232         if (dsa_sign)
1233                 {
1234                 mask|=SSL_aDSS;
1235                 emask|=SSL_aDSS;
1236                 }
1237
1238 #ifdef SSL_ALLOW_ADH
1239         mask|=SSL_aNULL;
1240         emask|=SSL_aNULL;
1241 #endif
1242
1243         c->mask=mask;
1244         c->export_mask=emask;
1245         c->valid=1;
1246         }
1247
1248 /* THIS NEEDS CLEANING UP */
1249 X509 *ssl_get_server_send_cert(SSL *s)
1250         {
1251         unsigned long alg,mask,kalg;
1252         CERT *c;
1253         int i,export;
1254
1255         c=s->cert;
1256         ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
1257         alg=s->s3->tmp.new_cipher->algorithms;
1258         export=SSL_IS_EXPORT(alg);
1259         mask=export?c->export_mask:c->mask;
1260         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1261
1262         if      (kalg & SSL_kDHr)
1263                 i=SSL_PKEY_DH_RSA;
1264         else if (kalg & SSL_kDHd)
1265                 i=SSL_PKEY_DH_DSA;
1266         else if (kalg & SSL_aDSS)
1267                 i=SSL_PKEY_DSA_SIGN;
1268         else if (kalg & SSL_aRSA)
1269                 {
1270                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1271                         i=SSL_PKEY_RSA_SIGN;
1272                 else
1273                         i=SSL_PKEY_RSA_ENC;
1274                 }
1275         else /* if (kalg & SSL_aNULL) */
1276                 {
1277                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1278                 return(NULL);
1279                 }
1280         if (c->pkeys[i].x509 == NULL) return(NULL);
1281         return(c->pkeys[i].x509);
1282         }
1283
1284 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)
1285         {
1286         unsigned long alg;
1287         CERT *c;
1288
1289         alg=cipher->algorithms;
1290         c=s->cert;
1291
1292         if ((alg & SSL_aDSS) &&
1293                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1294                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1295         else if (alg & SSL_aRSA)
1296                 {
1297                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1298                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1299                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1300                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1301                 else
1302                         return(NULL);
1303                 }
1304         else /* if (alg & SSL_aNULL) */
1305                 {
1306                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1307                 return(NULL);
1308                 }
1309         }
1310
1311 void ssl_update_cache(SSL *s,int mode)
1312         {
1313         int i;
1314
1315         /* If the session_id_length is 0, we are not supposed to cache it,
1316          * and it would be rather hard to do anyway :-) */
1317         if (s->session->session_id_length == 0) return;
1318
1319         if ((s->ctx->session_cache_mode & mode)
1320                 && (!s->hit)
1321                 && SSL_CTX_add_session(s->ctx,s->session)
1322                 && (s->ctx->new_session_cb != NULL))
1323                 {
1324                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1325                 if (!s->ctx->new_session_cb(s,s->session))
1326                         SSL_SESSION_free(s->session);
1327                 }
1328
1329         /* auto flush every 255 connections */
1330         i=s->ctx->session_cache_mode;
1331         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1332                 ((i & mode) == mode))
1333                 {
1334                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1335                         ?s->ctx->stats.sess_connect_good
1336                         :s->ctx->stats.sess_accept_good) & 0xff) == 0xff)
1337                         {
1338                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1339                         }
1340                 }
1341         }
1342
1343 SSL_METHOD *SSL_get_ssl_method(SSL *s)
1344         {
1345         return(s->method);
1346         }
1347
1348 int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)
1349         {
1350         int conn= -1;
1351         int ret=1;
1352
1353         if (s->method != meth)
1354                 {
1355                 if (s->handshake_func != NULL)
1356                         conn=(s->handshake_func == s->method->ssl_connect);
1357
1358                 if (s->method->version == meth->version)
1359                         s->method=meth;
1360                 else
1361                         {
1362                         s->method->ssl_free(s);
1363                         s->method=meth;
1364                         ret=s->method->ssl_new(s);
1365                         }
1366
1367                 if (conn == 1)
1368                         s->handshake_func=meth->ssl_connect;
1369                 else if (conn == 0)
1370                         s->handshake_func=meth->ssl_accept;
1371                 }
1372         return(ret);
1373         }
1374
1375 int SSL_get_error(SSL *s,int i)
1376         {
1377         int reason;
1378         unsigned long l;
1379         BIO *bio;
1380
1381         if (i > 0) return(SSL_ERROR_NONE);
1382
1383         /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
1384          * etc, where we do encode the error */
1385         if ((l=ERR_peek_error()) != 0)
1386                 {
1387                 if (ERR_GET_LIB(l) == ERR_LIB_SYS)
1388                         return(SSL_ERROR_SYSCALL);
1389                 else
1390                         return(SSL_ERROR_SSL);
1391                 }
1392
1393         if ((i < 0) && SSL_want_read(s))
1394                 {
1395                 bio=SSL_get_rbio(s);
1396                 if (BIO_should_read(bio))
1397                         return(SSL_ERROR_WANT_READ);
1398                 else if (BIO_should_write(bio))
1399                         return(SSL_ERROR_WANT_WRITE);
1400                 else if (BIO_should_io_special(bio))
1401                         {
1402                         reason=BIO_get_retry_reason(bio);
1403                         if (reason == BIO_RR_CONNECT)
1404                                 return(SSL_ERROR_WANT_CONNECT);
1405                         else
1406                                 return(SSL_ERROR_SYSCALL); /* unknown */
1407                         }
1408                 }
1409
1410         if ((i < 0) && SSL_want_write(s))
1411                 {
1412                 bio=SSL_get_wbio(s);
1413                 if (BIO_should_write(bio))
1414                         return(SSL_ERROR_WANT_WRITE);
1415                 else if (BIO_should_read(bio))
1416                         return(SSL_ERROR_WANT_READ);
1417                 else if (BIO_should_io_special(bio))
1418                         {
1419                         reason=BIO_get_retry_reason(bio);
1420                         if (reason == BIO_RR_CONNECT)
1421                                 return(SSL_ERROR_WANT_CONNECT);
1422                         else
1423                                 return(SSL_ERROR_SYSCALL);
1424                         }
1425                 }
1426         if ((i < 0) && SSL_want_x509_lookup(s))
1427                 {
1428                 return(SSL_ERROR_WANT_X509_LOOKUP);
1429                 }
1430
1431         if (i == 0)
1432                 {
1433                 if (s->version == SSL2_VERSION)
1434                         {
1435                         /* assume it is the socket being closed */
1436                         return(SSL_ERROR_ZERO_RETURN);
1437                         }
1438                 else
1439                         {
1440                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1441                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1442                                 return(SSL_ERROR_ZERO_RETURN);
1443                         }
1444                 }
1445         return(SSL_ERROR_SYSCALL);
1446         }
1447
1448 int SSL_do_handshake(SSL *s)
1449         {
1450         int ret=1;
1451
1452         if (s->handshake_func == NULL)
1453                 {
1454                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1455                 return(-1);
1456                 }
1457
1458         s->method->ssl_renegotiate_check(s);
1459
1460         if (SSL_in_init(s) || SSL_in_before(s))
1461                 {
1462                 ret=s->handshake_func(s);
1463                 }
1464         return(ret);
1465         }
1466
1467 /* For the next 2 functions, SSL_clear() sets shutdown and so
1468  * one of these calls will reset it */
1469 void SSL_set_accept_state(SSL *s)
1470         {
1471         s->server=1;
1472         s->shutdown=0;
1473         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1474         s->handshake_func=s->method->ssl_accept;
1475         /* clear the current cipher */
1476         ssl_clear_cipher_ctx(s);
1477         }
1478
1479 void SSL_set_connect_state(SSL *s)
1480         {
1481         s->server=0;
1482         s->shutdown=0;
1483         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1484         s->handshake_func=s->method->ssl_connect;
1485         /* clear the current cipher */
1486         ssl_clear_cipher_ctx(s);
1487         }
1488
1489 int ssl_undefined_function(SSL *s)
1490         {
1491         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1492         return(0);
1493         }
1494
1495 SSL_METHOD *ssl_bad_method(int ver)
1496         {
1497         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1498         return(NULL);
1499         }
1500
1501 char *SSL_get_version(SSL *s)
1502         {
1503         if (s->version == TLS1_VERSION)
1504                 return("TLSv1");
1505         else if (s->version == SSL3_VERSION)
1506                 return("SSLv3");
1507         else if (s->version == SSL2_VERSION)
1508                 return("SSLv2");
1509         else
1510                 return("unknown");
1511         }
1512
1513 SSL *SSL_dup(SSL *s)
1514         {
1515         STACK_OF(X509_NAME) *sk;
1516         X509_NAME *xn;
1517         SSL *ret;
1518         int i;
1519
1520         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
1521             return(NULL);
1522
1523         if (s->session != NULL)
1524                 {
1525                 /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
1526                 SSL_copy_session_id(ret,s);
1527                 }
1528         else
1529                 {
1530                 /* No session has been established yet, so we have to expect
1531                  * that s->cert or ret->cert will be changed later --
1532                  * they should not both point to the same object,
1533                  * and thus we can't use SSL_copy_session_id. */
1534
1535                 ret->method = s->method;
1536                 ret->method->ssl_new(ret);
1537
1538                 if (s->cert != NULL)
1539                         {
1540                         ret->cert = ssl_cert_dup(s->cert);
1541                         if (ret->cert == NULL)
1542                                 goto err;
1543                         }
1544
1545                 SSL_set_session_id_context(ret,
1546                         s->sid_ctx, s->sid_ctx_length);
1547                 }
1548
1549         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1550         SSL_set_verify(ret,SSL_get_verify_mode(s),
1551                 SSL_get_verify_callback(s));
1552         SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
1553
1554         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1555
1556         ret->debug=s->debug;
1557         ret->options=s->options;
1558
1559         /* copy app data, a little dangerous perhaps */
1560         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1561                 goto err;
1562
1563         /* setup rbio, and wbio */
1564         if (s->rbio != NULL)
1565                 {
1566                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1567                         goto err;
1568                 }
1569         if (s->wbio != NULL)
1570                 {
1571                 if (s->wbio != s->rbio)
1572                         {
1573                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1574                                 goto err;
1575                         }
1576                 else
1577                         ret->wbio=ret->rbio;
1578                 }
1579
1580         /* dup the cipher_list and cipher_list_by_id stacks */
1581         if (s->cipher_list != NULL)
1582                 {
1583                 if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
1584                         goto err;
1585                 }
1586         if (s->cipher_list_by_id != NULL)
1587                 if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
1588                         == NULL)
1589                         goto err;
1590
1591         /* Dup the client_CA list */
1592         if (s->client_CA != NULL)
1593                 {
1594                 if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
1595                 ret->client_CA=sk;
1596                 for (i=0; i<sk_X509_NAME_num(sk); i++)
1597                         {
1598                         xn=sk_X509_NAME_value(sk,i);
1599                         if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
1600                                 {
1601                                 X509_NAME_free(xn);
1602                                 goto err;
1603                                 }
1604                         }
1605                 }
1606
1607         ret->shutdown=s->shutdown;
1608         ret->state=s->state;
1609         ret->handshake_func=s->handshake_func;
1610         ret->server=s->server;
1611
1612         if (0)
1613                 {
1614 err:
1615                 if (ret != NULL) SSL_free(ret);
1616                 ret=NULL;
1617                 }
1618         return(ret);
1619         }
1620
1621 void ssl_clear_cipher_ctx(SSL *s)
1622         {
1623         if (s->enc_read_ctx != NULL)
1624                 {
1625                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1626                 Free(s->enc_read_ctx);
1627                 s->enc_read_ctx=NULL;
1628                 }
1629         if (s->enc_write_ctx != NULL)
1630                 {
1631                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1632                 Free(s->enc_write_ctx);
1633                 s->enc_write_ctx=NULL;
1634                 }
1635         if (s->expand != NULL)
1636                 {
1637                 COMP_CTX_free(s->expand);
1638                 s->expand=NULL;
1639                 }
1640         if (s->compress != NULL)
1641                 {
1642                 COMP_CTX_free(s->compress);
1643                 s->compress=NULL;
1644                 }
1645         }
1646
1647 /* Fix this function so that it takes an optional type parameter */
1648 X509 *SSL_get_certificate(SSL *s)
1649         {
1650         if (s->cert != NULL)
1651                 return(s->cert->key->x509);
1652         else
1653                 return(NULL);
1654         }
1655
1656 /* Fix this function so that it takes an optional type parameter */
1657 EVP_PKEY *SSL_get_privatekey(SSL *s)
1658         {
1659         if (s->cert != NULL)
1660                 return(s->cert->key->privatekey);
1661         else
1662                 return(NULL);
1663         }
1664
1665 SSL_CIPHER *SSL_get_current_cipher(SSL *s)
1666         {
1667         if ((s->session != NULL) && (s->session->cipher != NULL))
1668                 return(s->session->cipher);
1669         return(NULL);
1670         }
1671
1672 int ssl_init_wbio_buffer(SSL *s,int push)
1673         {
1674         BIO *bbio;
1675
1676         if (s->bbio == NULL)
1677                 {
1678                 bbio=BIO_new(BIO_f_buffer());
1679                 if (bbio == NULL) return(0);
1680                 s->bbio=bbio;
1681                 }
1682         else
1683                 {
1684                 bbio=s->bbio;
1685                 if (s->bbio == s->wbio)
1686                         s->wbio=BIO_pop(s->wbio);
1687                 }
1688         BIO_reset(bbio);
1689 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1690         if (!BIO_set_read_buffer_size(bbio,1))
1691                 {
1692                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1693                 return(0);
1694                 }
1695         if (push)
1696                 {
1697                 if (s->wbio != bbio)
1698                         s->wbio=BIO_push(bbio,s->wbio);
1699                 }
1700         else
1701                 {
1702                 if (s->wbio == bbio)
1703                         s->wbio=BIO_pop(bbio);
1704                 }
1705         return(1);
1706         }
1707
1708 void ssl_free_wbio_buffer(SSL *s)
1709         {
1710         BIO *under;
1711
1712         if (s->bbio == NULL) return;
1713
1714         if (s->bbio == s->wbio)
1715                 {
1716                 /* remove buffering */
1717                 under=BIO_pop(s->wbio);
1718                 if (under != NULL)
1719                         s->wbio=under;
1720                 else
1721                         abort(); /* ok */
1722                 }
1723         BIO_free(s->bbio);
1724         s->bbio=NULL;
1725         }
1726
1727 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
1728         {
1729         ctx->quiet_shutdown=mode;
1730         }
1731
1732 int SSL_CTX_get_quiet_shutdown(SSL_CTX *ctx)
1733         {
1734         return(ctx->quiet_shutdown);
1735         }
1736
1737 void SSL_set_quiet_shutdown(SSL *s,int mode)
1738         {
1739         s->quiet_shutdown=mode;
1740         }
1741
1742 int SSL_get_quiet_shutdown(SSL *s)
1743         {
1744         return(s->quiet_shutdown);
1745         }
1746
1747 void SSL_set_shutdown(SSL *s,int mode)
1748         {
1749         s->shutdown=mode;
1750         }
1751
1752 int SSL_get_shutdown(SSL *s)
1753         {
1754         return(s->shutdown);
1755         }
1756
1757 int SSL_version(SSL *s)
1758         {
1759         return(s->version);
1760         }
1761
1762 SSL_CTX *SSL_get_SSL_CTX(SSL *ssl)
1763         {
1764         return(ssl->ctx);
1765         }
1766
1767 #ifndef NO_STDIO
1768 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
1769         {
1770         return(X509_STORE_set_default_paths(ctx->cert_store));
1771         }
1772
1773 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
1774                 const char *CApath)
1775         {
1776         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
1777         }
1778 #endif
1779
1780 void SSL_set_info_callback(SSL *ssl,void (*cb)())
1781         {
1782         ssl->info_callback=cb;
1783         }
1784
1785 void (*SSL_get_info_callback(SSL *ssl))(void)
1786         {
1787         return((void (*)())ssl->info_callback);
1788         }
1789
1790 int SSL_state(SSL *ssl)
1791         {
1792         return(ssl->state);
1793         }
1794
1795 void SSL_set_verify_result(SSL *ssl,long arg)
1796         {
1797         ssl->verify_result=arg;
1798         }
1799
1800 long SSL_get_verify_result(SSL *ssl)
1801         {
1802         return(ssl->verify_result);
1803         }
1804
1805 int SSL_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1806                          int (*dup_func)(),void (*free_func)())
1807         {
1808         ssl_meth_num++;
1809         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
1810                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
1811         }
1812
1813 int SSL_set_ex_data(SSL *s,int idx,void *arg)
1814         {
1815         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1816         }
1817
1818 void *SSL_get_ex_data(SSL *s,int idx)
1819         {
1820         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1821         }
1822
1823 int SSL_CTX_get_ex_new_index(long argl,char *argp,int (*new_func)(),
1824                              int (*dup_func)(),void (*free_func)())
1825         {
1826         ssl_ctx_meth_num++;
1827         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
1828                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
1829         }
1830
1831 int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
1832         {
1833         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1834         }
1835
1836 void *SSL_CTX_get_ex_data(SSL_CTX *s,int idx)
1837         {
1838         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1839         }
1840
1841 int ssl_ok(SSL *s)
1842         {
1843         return(1);
1844         }
1845
1846 X509_STORE *SSL_CTX_get_cert_store(SSL_CTX *ctx)
1847         {
1848         return(ctx->cert_store);
1849         }
1850
1851 void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)
1852         {
1853         if (ctx->cert_store != NULL)
1854                 X509_STORE_free(ctx->cert_store);
1855         ctx->cert_store=store;
1856         }
1857
1858 int SSL_want(SSL *s)
1859         {
1860         return(s->rwstate);
1861         }
1862
1863 /*!
1864  * \brief Set the callback for generating temporary RSA keys.
1865  * \param ctx the SSL context.
1866  * \param cb the callback
1867  */
1868
1869 #ifndef NO_RSA
1870 void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,int export,
1871                                                           int keylength))
1872     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1873 #endif
1874
1875 #ifndef NO_RSA
1876 void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,int export,
1877                                                           int keylength))
1878     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,0,(char *)cb); }
1879 #endif
1880
1881 #ifdef DOXYGEN
1882 /*!
1883  * \brief The RSA temporary key callback function.
1884  * \param ssl the SSL session.
1885  * \param export \c TRUE if the temp RSA key is for an export ciphersuite.
1886  * \param keylength if \c export is \c TRUE, then \c keylength is the size of
1887  * the required key in bits.
1888  * \return the temporary RSA key.
1889  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
1890  */
1891
1892 RSA *cb(SSL *ssl,int export,int keylength)
1893     {}
1894 #endif
1895
1896 /*!
1897  * \brief Set the callback for generating temporary DH keys.
1898  * \param ctx the SSL context.
1899  * \param dh the callback
1900  */
1901
1902 #ifndef NO_DH
1903 void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int export,
1904                                                         int keylength))
1905     { SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1906
1907 void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int export,
1908                                                         int keylength))
1909     { SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,0,(char *)dh); }
1910 #endif
1911
1912 #if defined(_WINDLL) && defined(WIN16)
1913 #include "../crypto/bio/bss_file.c"
1914 #endif
1915
1916 IMPLEMENT_STACK_OF(SSL_CIPHER)
1917 IMPLEMENT_STACK_OF(SSL_COMP)