ssl/ssl_lib.c

   1 /* ssl/ssl_lib.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include "objects.h"
  61 #include "lhash.h"
  62 #include "ssl_locl.h"
  63
  64 char *SSL_version_str="OpenSSL 0.9.1c 23-Dec-1998";
  65
  66 static STACK *ssl_meth=NULL;
  67 static STACK *ssl_ctx_meth=NULL;
  68 static int ssl_meth_num=0;
  69 static int ssl_ctx_meth_num=0;
  70
  71 SSL3_ENC_METHOD ssl3_undef_enc_method={
  72         ssl_undefined_function,
  73         ssl_undefined_function,
  74         ssl_undefined_function,
  75         ssl_undefined_function,
  76         ssl_undefined_function,
  77         ssl_undefined_function,
  78         };
  79
  80 void SSL_clear(s)
  81 SSL *s;
  82         {
  83         int state;
  84
  85         if (s->method == NULL) return;
  86
  87         s->error=0;
  88         s->hit=0;
  89
  90         /* This is set if we are doing dynamic renegotiation so keep
  91          * the old cipher.  It is sort of a SSL_clear_lite :-) */
  92         if (s->new_session) return;
  93
  94         state=s->state; /* Keep to check if we throw away the session-id */
  95         s->type=0;
  96
  97         s->version=s->method->version;
  98         s->rwstate=SSL_NOTHING;
  99         s->state=SSL_ST_BEFORE;
 100         s->rstate=SSL_ST_READ_HEADER;
 101         s->read_ahead=s->ctx->default_read_ahead;
 102
 103 /*      s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN); */
 104
 105         if (s->init_buf != NULL)
 106                 {
 107                 BUF_MEM_free(s->init_buf);
 108                 s->init_buf=NULL;
 109                 }
 110
 111         ssl_clear_cipher_ctx(s);
 112
 113         if (ssl_clear_bad_session(s))
 114                 {
 115                 SSL_SESSION_free(s->session);
 116                 s->session=NULL;
 117                 }
 118
 119         s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
 120         s->first_packet=0;
 121
 122         s->method->ssl_clear(s);
 123         }
 124
 125 /* Used to change an SSL_CTXs default SSL method type */
 126 int SSL_CTX_set_ssl_version(ctx,meth)
 127 SSL_CTX *ctx;
 128 SSL_METHOD *meth;
 129         {
 130         STACK *sk;
 131
 132         ctx->method=meth;
 133
 134         sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
 135                 &(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);
 136         if ((sk == NULL) || (sk_num(sk) <= 0))
 137                 {
 138                 SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
 139                 return(0);
 140                 }
 141         return(1);
 142         }
 143
 144 SSL *SSL_new(ctx)
 145 SSL_CTX *ctx;
 146         {
 147         SSL *s;
 148
 149         if (ctx == NULL)
 150                 {
 151                 SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
 152                 return(NULL);
 153                 }
 154         if (ctx->method == NULL)
 155                 {
 156                 SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
 157                 return(NULL);
 158                 }
 159
 160         s=(SSL *)Malloc(sizeof(SSL));
 161         if (s == NULL) goto err;
 162         memset(s,0,sizeof(SSL));
 163
 164         if (ctx->default_cert != NULL)
 165                 {
 166                 CRYPTO_add(&ctx->default_cert->references,1,
 167                         CRYPTO_LOCK_SSL_CERT);
 168                 s->cert=ctx->default_cert;
 169                 }
 170         else
 171                 s->cert=NULL;
 172         s->verify_mode=ctx->default_verify_mode;
 173         s->verify_callback=ctx->default_verify_callback;
 174         CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
 175         s->ctx=ctx;
 176
 177         s->verify_result=X509_V_OK;
 178
 179         s->method=ctx->method;
 180
 181         if (!s->method->ssl_new(s))
 182                 {
 183                 SSL_CTX_free(ctx);
 184                 Free(s);
 185                 goto err;
 186                 }
 187
 188         s->quiet_shutdown=ctx->quiet_shutdown;
 189         s->references=1;
 190         s->options=ctx->options;
 191         SSL_clear(s);
 192
 193         CRYPTO_new_ex_data(ssl_meth,(char *)s,&s->ex_data);
 194
 195         return(s);
 196 err:
 197         SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
 198         return(NULL);
 199         }
 200
 201 void SSL_free(s)
 202 SSL *s;
 203         {
 204         int i;
 205
 206         i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
 207 #ifdef REF_PRINT
 208         REF_PRINT("SSL",s);
 209 #endif
 210         if (i > 0) return;
 211 #ifdef REF_CHECK
 212         if (i < 0)
 213                 {
 214                 fprintf(stderr,"SSL_free, bad reference count\n");
 215                 abort(); /* ok */
 216                 }
 217 #endif
 218
 219         CRYPTO_free_ex_data(ssl_meth,(char *)s,&s->ex_data);
 220
 221         if (s->bbio != NULL)
 222                 {
 223                 /* If the buffering BIO is in place, pop it off */
 224                 if (s->bbio == s->wbio)
 225                         {
 226                         s->wbio=BIO_pop(s->wbio);
 227                         }
 228                 BIO_free(s->bbio);
 229                 s->bbio=NULL;
 230                 }
 231         if (s->rbio != NULL)
 232                 BIO_free_all(s->rbio);
 233         if ((s->wbio != NULL) && (s->wbio != s->rbio))
 234                 BIO_free_all(s->wbio);
 235
 236         if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);
 237
 238         /* add extra stuff */
 239         if (s->cipher_list != NULL) sk_free(s->cipher_list);
 240         if (s->cipher_list_by_id != NULL) sk_free(s->cipher_list_by_id);
 241
 242         /* Make the next call work :-) */
 243         if (s->session != NULL)
 244                 {
 245                 ssl_clear_bad_session(s);
 246                 SSL_SESSION_free(s->session);
 247                 }
 248
 249         ssl_clear_cipher_ctx(s);
 250
 251         if (s->expand != NULL)
 252                 COMP_CTX_free(s->expand);
 253         if (s->compress != NULL)
 254                 COMP_CTX_free(s->compress);
 255
 256         if (s->cert != NULL) ssl_cert_free(s->cert);
 257         /* Free up if allocated */
 258
 259         if (s->ctx) SSL_CTX_free(s->ctx);
 260
 261         if (s->client_CA != NULL)
 262                 sk_pop_free(s->client_CA,X509_NAME_free);
 263
 264         if (s->method != NULL) s->method->ssl_free(s);
 265
 266         Free((char *)s);
 267         }
 268
 269 void SSL_set_bio(s, rbio,wbio)
 270 SSL *s;
 271 BIO *rbio;
 272 BIO *wbio;
 273         {
 274         /* If the output buffering BIO is still in place, remove it
 275          */
 276         if (s->bbio != NULL)
 277                 {
 278                 if (s->wbio == s->bbio)
 279                         {
 280                         s->wbio=s->wbio->next_bio;
 281                         s->bbio->next_bio=NULL;
 282                         }
 283                 }
 284         if ((s->rbio != NULL) && (s->rbio != rbio))
 285                 BIO_free_all(s->rbio);
 286         if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
 287                 BIO_free_all(s->wbio);
 288         s->rbio=rbio;
 289         s->wbio=wbio;
 290         }
 291
 292 BIO *SSL_get_rbio(s)
 293 SSL *s;
 294         { return(s->rbio); }
 295
 296 BIO *SSL_get_wbio(s)
 297 SSL *s;
 298         { return(s->wbio); }
 299
 300 int SSL_get_fd(s)
 301 SSL *s;
 302         {
 303         int ret= -1;
 304         BIO *b,*r;
 305
 306         b=SSL_get_rbio(s);
 307         r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
 308         if (r != NULL)
 309                 BIO_get_fd(r,&ret);
 310         return(ret);
 311         }
 312
 313 #ifndef NO_SOCK
 314 int SSL_set_fd(s, fd)
 315 SSL *s;
 316 int fd;
 317         {
 318         int ret=0;
 319         BIO *bio=NULL;
 320
 321         bio=BIO_new(BIO_s_socket());
 322
 323         if (bio == NULL)
 324                 {
 325                 SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
 326                 goto err;
 327                 }
 328         BIO_set_fd(bio,fd,BIO_NOCLOSE);
 329         SSL_set_bio(s,bio,bio);
 330         ret=1;
 331 err:
 332         return(ret);
 333         }
 334
 335 int SSL_set_wfd(s, fd)
 336 SSL *s;
 337 int fd;
 338         {
 339         int ret=0;
 340         BIO *bio=NULL;
 341
 342         if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
 343                 || ((int)BIO_get_fd(s->rbio,NULL) != fd))
 344                 {
 345                 bio=BIO_new(BIO_s_socket());
 346
 347                 if (bio == NULL)
 348                         { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
 349                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 350                 SSL_set_bio(s,SSL_get_rbio(s),bio);
 351                 }
 352         else
 353                 SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
 354         ret=1;
 355 err:
 356         return(ret);
 357         }
 358
 359 int SSL_set_rfd(s, fd)
 360 SSL *s;
 361 int fd;
 362         {
 363         int ret=0;
 364         BIO *bio=NULL;
 365
 366         if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
 367                 || ((int)BIO_get_fd(s->wbio,NULL) != fd))
 368                 {
 369                 bio=BIO_new(BIO_s_socket());
 370
 371                 if (bio == NULL)
 372                         {
 373                         SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
 374                         goto err;
 375                         }
 376                 BIO_set_fd(bio,fd,BIO_NOCLOSE);
 377                 SSL_set_bio(s,bio,SSL_get_wbio(s));
 378                 }
 379         else
 380                 SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
 381         ret=1;
 382 err:
 383         return(ret);
 384         }
 385 #endif
 386
 387 int SSL_get_verify_mode(s)
 388 SSL *s;
 389         {
 390         return(s->verify_mode);
 391         }
 392
 393 int (*SSL_get_verify_callback(s))()
 394 SSL *s;
 395         {
 396         return(s->verify_callback);
 397         }
 398
 399 int SSL_CTX_get_verify_mode(ctx)
 400 SSL_CTX *ctx;
 401         {
 402         return(ctx->default_verify_mode);
 403         }
 404
 405 int (*SSL_CTX_get_verify_callback(ctx))()
 406 SSL_CTX *ctx;
 407         {
 408         return(ctx->default_verify_callback);
 409         }
 410
 411 void SSL_set_verify(s, mode, callback)
 412 SSL *s;
 413 int mode;
 414 int (*callback)();
 415         {
 416         s->verify_mode=mode;
 417         if (callback != NULL)
 418                 s->verify_callback=callback;
 419         }
 420
 421 void SSL_set_read_ahead(s, yes)
 422 SSL *s;
 423 int yes;
 424         {
 425         s->read_ahead=yes;
 426         }
 427
 428 int SSL_get_read_ahead(s)
 429 SSL *s;
 430         {
 431         return(s->read_ahead);
 432         }
 433
 434 int SSL_pending(s)
 435 SSL *s;
 436         {
 437         return(s->method->ssl_pending(s));
 438         }
 439
 440 X509 *SSL_get_peer_certificate(s)
 441 SSL *s;
 442         {
 443         X509 *r;
 444
 445         if ((s == NULL) || (s->session == NULL))
 446                 r=NULL;
 447         else
 448                 r=s->session->peer;
 449
 450         if (r == NULL) return(r);
 451
 452         CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);
 453
 454         return(r);
 455         }
 456
 457 STACK *SSL_get_peer_cert_chain(s)
 458 SSL *s;
 459         {
 460         STACK *r;
 461
 462         if ((s == NULL) || (s->session == NULL) || (s->session->cert == NULL))
 463                 r=NULL;
 464         else
 465                 r=s->session->cert->cert_chain;
 466
 467         return(r);
 468         }
 469
 470 /* Now in theory, since the calling process own 't' it should be safe to
 471  * modify.  We need to be able to read f without being hassled */
 472 void SSL_copy_session_id(t,f)
 473 SSL *t,*f;
 474         {
 475         CERT *tmp;
 476
 477         /* Do we need to to SSL locking? */
 478         SSL_set_session(t,SSL_get_session(f));
 479
 480         /* what if we are setup as SSLv2 but want to talk SSLv3 or
 481          * vice-versa */
 482         if (t->method != f->method)
 483                 {
 484                 t->method->ssl_free(t); /* cleanup current */
 485                 t->method=f->method;    /* change method */
 486                 t->method->ssl_new(t);  /* setup new */
 487                 }
 488
 489         tmp=t->cert;
 490         if (f->cert != NULL)
 491                 {
 492                 CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
 493                 t->cert=f->cert;
 494                 }
 495         else
 496                 t->cert=NULL;
 497         if (tmp != NULL) ssl_cert_free(tmp);
 498         }
 499
 500 /* Fix this so it checks all the valid key/cert options */
 501 int SSL_CTX_check_private_key(ctx)
 502 SSL_CTX *ctx;
 503         {
 504         if (    (ctx == NULL) ||
 505                 (ctx->default_cert == NULL) ||
 506                 (ctx->default_cert->key->x509 == NULL))
 507                 {
 508                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 509                 return(0);
 510                 }
 511         if      (ctx->default_cert->key->privatekey == NULL)
 512                 {
 513                 SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 514                 return(0);
 515                 }
 516         return(X509_check_private_key(ctx->default_cert->key->x509, ctx->default_cert->key->privatekey));
 517         }
 518
 519 /* Fix this function so that it takes an optional type parameter */
 520 int SSL_check_private_key(ssl)
 521 SSL *ssl;
 522         {
 523         if (ssl == NULL)
 524                 {
 525                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
 526                 return(0);
 527                 }
 528         if (ssl->cert == NULL)
 529                 return(SSL_CTX_check_private_key(ssl->ctx));
 530         if (ssl->cert->key->x509 == NULL)
 531                 {
 532                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
 533                 return(0);
 534                 }
 535         if (ssl->cert->key->privatekey == NULL)
 536                 {
 537                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
 538                 return(0);
 539                 }
 540         return(X509_check_private_key(ssl->cert->key->x509,
 541                 ssl->cert->key->privatekey));
 542         }
 543
 544 int SSL_accept(s)
 545 SSL *s;
 546         {
 547         return(s->method->ssl_accept(s));
 548         }
 549
 550 int SSL_connect(s)
 551 SSL *s;
 552         {
 553         return(s->method->ssl_connect(s));
 554         }
 555
 556 long SSL_get_default_timeout(s)
 557 SSL *s;
 558         {
 559         return(s->method->get_timeout());
 560         }
 561
 562 int SSL_read(s,buf,num)
 563 SSL *s;
 564 char *buf;
 565 int num;
 566         {
 567         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 568                 {
 569                 s->rwstate=SSL_NOTHING;
 570                 return(0);
 571                 }
 572         return(s->method->ssl_read(s,buf,num));
 573         }
 574
 575 int SSL_peek(s,buf,num)
 576 SSL *s;
 577 char *buf;
 578 int num;
 579         {
 580         if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
 581                 {
 582                 return(0);
 583                 }
 584         return(s->method->ssl_peek(s,buf,num));
 585         }
 586
 587 int SSL_write(s,buf,num)
 588 SSL *s;
 589 char *buf;
 590 int num;
 591         {
 592         if (s->shutdown & SSL_SENT_SHUTDOWN)
 593                 {
 594                 s->rwstate=SSL_NOTHING;
 595                 SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
 596                 return(-1);
 597                 }
 598         return(s->method->ssl_write(s,buf,num));
 599         }
 600
 601 int SSL_shutdown(s)
 602 SSL *s;
 603         {
 604         if ((s != NULL) && !SSL_in_init(s))
 605                 return(s->method->ssl_shutdown(s));
 606         else
 607                 return(1);
 608         }
 609
 610 int SSL_renegotiate(s)
 611 SSL *s;
 612         {
 613         s->new_session=1;
 614         return(s->method->ssl_renegotiate(s));
 615         }
 616
 617 long SSL_ctrl(s,cmd,larg,parg)
 618 SSL *s;
 619 int cmd;
 620 long larg;
 621 char *parg;
 622         {
 623         return(s->method->ssl_ctrl(s,cmd,larg,parg));
 624         }
 625
 626 long SSL_CTX_ctrl(ctx,cmd,larg,parg)
 627 SSL_CTX *ctx;
 628 int cmd;
 629 long larg;
 630 char *parg;
 631         {
 632         return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
 633         }
 634
 635 int ssl_cipher_id_cmp(a,b)
 636 SSL_CIPHER *a,*b;
 637         {
 638         long l;
 639
 640         l=a->id-b->id;
 641         if (l == 0L)
 642                 return(0);
 643         else
 644                 return((l > 0)?1:-1);
 645         }
 646
 647 int ssl_cipher_ptr_id_cmp(ap,bp)
 648 SSL_CIPHER **ap,**bp;
 649         {
 650         long l;
 651
 652         l=(*ap)->id-(*bp)->id;
 653         if (l == 0L)
 654                 return(0);
 655         else
 656                 return((l > 0)?1:-1);
 657         }
 658
 659 /* return a STACK of the ciphers available for the SSL and in order of
 660  * preference */
 661 STACK *SSL_get_ciphers(s)
 662 SSL *s;
 663         {
 664         if ((s != NULL) && (s->cipher_list != NULL))
 665                 {
 666                 return(s->cipher_list);
 667                 }
 668         else if ((s->ctx != NULL) &&
 669                 (s->ctx->cipher_list != NULL))
 670                 {
 671                 return(s->ctx->cipher_list);
 672                 }
 673         return(NULL);
 674         }
 675
 676 /* return a STACK of the ciphers available for the SSL and in order of
 677  * algorithm id */
 678 STACK *ssl_get_ciphers_by_id(s)
 679 SSL *s;
 680         {
 681         if ((s != NULL) && (s->cipher_list_by_id != NULL))
 682                 {
 683                 return(s->cipher_list_by_id);
 684                 }
 685         else if ((s != NULL) && (s->ctx != NULL) &&
 686                 (s->ctx->cipher_list_by_id != NULL))
 687                 {
 688                 return(s->ctx->cipher_list_by_id);
 689                 }
 690         return(NULL);
 691         }
 692
 693 /* The old interface to get the same thing as SSL_get_ciphers() */
 694 char *SSL_get_cipher_list(s,n)
 695 SSL *s;
 696 int n;
 697         {
 698         SSL_CIPHER *c;
 699         STACK *sk;
 700
 701         if (s == NULL) return(NULL);
 702         sk=SSL_get_ciphers(s);
 703         if ((sk == NULL) || (sk_num(sk) <= n))
 704                 return(NULL);
 705         c=(SSL_CIPHER *)sk_value(sk,n);
 706         if (c == NULL) return(NULL);
 707         return(c->name);
 708         }
 709
 710 /* specify the ciphers to be used by defaut by the SSL_CTX */
 711 int SSL_CTX_set_cipher_list(ctx,str)
 712 SSL_CTX *ctx;
 713 char *str;
 714         {
 715         STACK *sk;
 716
 717         sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,
 718                 &ctx->cipher_list_by_id,str);
 719 /* XXXX */
 720         return((sk == NULL)?0:1);
 721         }
 722
 723 /* specify the ciphers to be used by the SSL */
 724 int SSL_set_cipher_list(s, str)
 725 SSL *s;
 726 char *str;
 727         {
 728         STACK *sk;
 729
 730         sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
 731                 &s->cipher_list_by_id,str);
 732 /* XXXX */
 733         return((sk == NULL)?0:1);
 734         }
 735
 736 /* works well for SSLv2, not so good for SSLv3 */
 737 char *SSL_get_shared_ciphers(s,buf,len)
 738 SSL *s;
 739 char *buf;
 740 int len;
 741         {
 742         char *p,*cp;
 743         STACK *sk;
 744         SSL_CIPHER *c;
 745         int i;
 746
 747         if ((s->session == NULL) || (s->session->ciphers == NULL) ||
 748                 (len < 2))
 749                 return(NULL);
 750
 751         p=buf;
 752         sk=s->session->ciphers;
 753         for (i=0; i<sk_num(sk); i++)
 754                 {
 755                 /* Decrement for either the ':' or a '\0' */
 756                 len--;
 757                 c=(SSL_CIPHER *)sk_value(sk,i);
 758                 for (cp=c->name; *cp; )
 759                         {
 760                         if (len-- == 0)
 761                                 {
 762                                 *p='\0';
 763                                 return(buf);
 764                                 }
 765                         else
 766                                 *(p++)= *(cp++);
 767                         }
 768                 *(p++)=':';
 769                 }
 770         p[-1]='\0';
 771         return(buf);
 772         }
 773
 774 int ssl_cipher_list_to_bytes(s,sk,p)
 775 SSL *s;
 776 STACK *sk;
 777 unsigned char *p;
 778         {
 779         int i,j=0;
 780         SSL_CIPHER *c;
 781         unsigned char *q;
 782
 783         if (sk == NULL) return(0);
 784         q=p;
 785
 786         for (i=0; i<sk_num(sk); i++)
 787                 {
 788                 c=(SSL_CIPHER *)sk_value(sk,i);
 789                 j=ssl_put_cipher_by_char(s,c,p);
 790                 p+=j;
 791                 }
 792         return(p-q);
 793         }
 794
 795 STACK *ssl_bytes_to_cipher_list(s,p,num,skp)
 796 SSL *s;
 797 unsigned char *p;
 798 int num;
 799 STACK **skp;
 800         {
 801         SSL_CIPHER *c;
 802         STACK *sk;
 803         int i,n;
 804
 805         n=ssl_put_cipher_by_char(s,NULL,NULL);
 806         if ((num%n) != 0)
 807                 {
 808                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
 809                 return(NULL);
 810                 }
 811         if ((skp == NULL) || (*skp == NULL))
 812                 sk=sk_new(NULL); /* change perhaps later */
 813         else
 814                 {
 815                 sk= *skp;
 816                 sk_zero(sk);
 817                 }
 818
 819         for (i=0; i<num; i+=n)
 820                 {
 821                 c=ssl_get_cipher_by_char(s,p);
 822                 p+=n;
 823                 if (c != NULL)
 824                         {
 825                         if (!sk_push(sk,(char *)c))
 826                                 {
 827                                 SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
 828                                 goto err;
 829                                 }
 830                         }
 831                 }
 832
 833         if (skp != NULL)
 834                 *skp=sk;
 835         return(sk);
 836 err:
 837         if ((skp == NULL) || (*skp == NULL))
 838                 sk_free(sk);
 839         return(NULL);
 840         }
 841
 842 unsigned long SSL_SESSION_hash(a)
 843 SSL_SESSION *a;
 844         {
 845         unsigned long l;
 846
 847         l=(unsigned long)
 848                 ((unsigned int) a->session_id[0]     )|
 849                 ((unsigned int) a->session_id[1]<< 8L)|
 850                 ((unsigned long)a->session_id[2]<<16L)|
 851                 ((unsigned long)a->session_id[3]<<24L);
 852         return(l);
 853         }
 854
 855 int SSL_SESSION_cmp(a, b)
 856 SSL_SESSION *a;
 857 SSL_SESSION *b;
 858         {
 859         if (a->ssl_version != b->ssl_version)
 860                 return(1);
 861         if (a->session_id_length != b->session_id_length)
 862                 return(1);
 863         return(memcmp(a->session_id,b->session_id,a->session_id_length));
 864         }
 865
 866 SSL_CTX *SSL_CTX_new(meth)
 867 SSL_METHOD *meth;
 868         {
 869         SSL_CTX *ret=NULL;
 870
 871         if (meth == NULL)
 872                 {
 873                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
 874                 return(NULL);
 875                 }
 876
 877         if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
 878                 {
 879                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
 880                 goto err;
 881                 }
 882         ret=(SSL_CTX *)Malloc(sizeof(SSL_CTX));
 883         if (ret == NULL)
 884                 goto err;
 885
 886         memset(ret,0,sizeof(SSL_CTX));
 887
 888         ret->method=meth;
 889
 890         ret->cert_store=NULL;
 891         ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
 892         ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
 893         ret->session_cache_head=NULL;
 894         ret->session_cache_tail=NULL;
 895
 896         /* We take the system default */
 897         ret->session_timeout=meth->get_timeout();
 898
 899         ret->new_session_cb=NULL;
 900         ret->remove_session_cb=NULL;
 901         ret->get_session_cb=NULL;
 902
 903         ret->sess_connect=0;
 904         ret->sess_connect_good=0;
 905         ret->sess_accept=0;
 906         ret->sess_accept_renegotiate=0;
 907         ret->sess_connect_renegotiate=0;
 908         ret->sess_accept_good=0;
 909         ret->sess_miss=0;
 910         ret->sess_timeout=0;
 911         ret->sess_cache_full=0;
 912         ret->sess_hit=0;
 913         ret->sess_cb_hit=0;
 914
 915         ret->references=1;
 916         ret->quiet_shutdown=0;
 917
 918 /*      ret->cipher=NULL;*/
 919 /*      ret->s2->challenge=NULL;
 920         ret->master_key=NULL;
 921         ret->key_arg=NULL;
 922         ret->s2->conn_id=NULL; */
 923
 924         ret->info_callback=NULL;
 925
 926         ret->app_verify_callback=NULL;
 927         ret->app_verify_arg=NULL;
 928
 929         ret->default_read_ahead=0;
 930         ret->default_verify_mode=SSL_VERIFY_NONE;
 931         ret->default_verify_callback=NULL;
 932         if ((ret->default_cert=ssl_cert_new()) == NULL)
 933                 goto err;
 934
 935         ret->default_passwd_callback=NULL;
 936         ret->client_cert_cb=NULL;
 937
 938         ret->sessions=lh_new(SSL_SESSION_hash,SSL_SESSION_cmp);
 939         if (ret->sessions == NULL) goto err;
 940         ret->cert_store=X509_STORE_new();
 941         if (ret->cert_store == NULL) goto err;
 942
 943         ssl_create_cipher_list(ret->method,
 944                 &ret->cipher_list,&ret->cipher_list_by_id,
 945                 SSL_DEFAULT_CIPHER_LIST);
 946         if ((ret->cipher_list == NULL) || (sk_num(ret->cipher_list) <= 0))
 947                 {
 948                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
 949                 goto err2;
 950                 }
 951
 952         if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
 953                 {
 954                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
 955                 goto err2;
 956                 }
 957         if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
 958                 {
 959                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
 960                 goto err2;
 961                 }
 962         if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
 963                 {
 964                 SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
 965                 goto err2;
 966                 }
 967
 968         if ((ret->client_CA=sk_new_null()) == NULL)
 969                 goto err;
 970
 971         CRYPTO_new_ex_data(ssl_ctx_meth,(char *)ret,&ret->ex_data);
 972
 973         ret->extra_certs=NULL;
 974
 975         return(ret);
 976 err:
 977         SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
 978 err2:
 979         if (ret != NULL) SSL_CTX_free(ret);
 980         return(NULL);
 981         }
 982
 983 void SSL_CTX_free(a)
 984 SSL_CTX *a;
 985         {
 986         int i;
 987
 988         if (a == NULL) return;
 989
 990         i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
 991 #ifdef REF_PRINT
 992         REF_PRINT("SSL_CTX",a);
 993 #endif
 994         if (i > 0) return;
 995 #ifdef REF_CHECK
 996         if (i < 0)
 997                 {
 998                 fprintf(stderr,"SSL_CTX_free, bad reference count\n");
 999                 abort(); /* ok */
1000                 }
1001 #endif
1002         CRYPTO_free_ex_data(ssl_ctx_meth,(char *)a,&a->ex_data);
1003
1004         if (a->sessions != NULL)
1005                 {
1006                 SSL_CTX_flush_sessions(a,0);
1007                 lh_free(a->sessions);
1008                 }
1009         if (a->cert_store != NULL)
1010                 X509_STORE_free(a->cert_store);
1011         if (a->cipher_list != NULL)
1012                 sk_free(a->cipher_list);
1013         if (a->cipher_list_by_id != NULL)
1014                 sk_free(a->cipher_list_by_id);
1015         if (a->default_cert != NULL)
1016                 ssl_cert_free(a->default_cert);
1017         if (a->client_CA != NULL)
1018                 sk_pop_free(a->client_CA,X509_NAME_free);
1019         if (a->extra_certs != NULL)
1020                 sk_pop_free(a->extra_certs,X509_free);
1021         Free((char *)a);
1022         }
1023
1024 void SSL_CTX_set_default_passwd_cb(ctx,cb)
1025 SSL_CTX *ctx;
1026 int (*cb)();
1027         {
1028         ctx->default_passwd_callback=cb;
1029         }
1030
1031 void SSL_CTX_set_cert_verify_cb(ctx,cb,arg)
1032 SSL_CTX *ctx;
1033 int (*cb)();
1034 char *arg;
1035         {
1036         ctx->app_verify_callback=cb;
1037         ctx->app_verify_arg=arg;
1038         }
1039
1040 void SSL_CTX_set_verify(ctx,mode,cb)
1041 SSL_CTX *ctx;
1042 int mode;
1043 int (*cb)();
1044         {
1045         ctx->default_verify_mode=mode;
1046         ctx->default_verify_callback=cb;
1047         /* This needs cleaning up EAY EAY EAY */
1048         X509_STORE_set_verify_cb_func(ctx->cert_store,cb);
1049         }
1050
1051 void ssl_set_cert_masks(c)
1052 CERT *c;
1053         {
1054         CERT_PKEY *cpk;
1055         int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
1056         int rsa_enc_export,dh_rsa_export,dh_dsa_export;
1057         int rsa_tmp_export,dh_tmp_export;
1058         unsigned long mask,emask;
1059
1060         if ((c == NULL) || (c->valid)) return;
1061
1062 #ifndef NO_RSA
1063         rsa_tmp=((c->rsa_tmp != NULL) || (c->rsa_tmp_cb != NULL))?1:0;
1064         rsa_tmp_export=((c->rsa_tmp_cb != NULL) ||
1065                 (rsa_tmp && (RSA_size(c->rsa_tmp)*8 <= 512)))?1:0;
1066 #else
1067         rsa_tmp=rsa_tmp_export=0;
1068 #endif
1069 #ifndef NO_DH
1070         dh_tmp=((c->dh_tmp != NULL) || (c->dh_tmp_cb != NULL))?1:0;
1071         dh_tmp_export=((c->dh_tmp_cb != NULL) ||
1072                 (dh_tmp && (DH_size(c->dh_tmp)*8 <= 512)))?1:0;
1073 #else
1074         dh_tmp=dh_tmp_export=0;
1075 #endif
1076
1077         cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
1078         rsa_enc= ((cpk->x509 != NULL) && (cpk->privatekey != NULL))?1:0;
1079         rsa_enc_export=(rsa_enc && (EVP_PKEY_size(cpk->privatekey)*8 <= 512))?1:0;
1080         cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
1081         rsa_sign=((cpk->x509 != NULL) && (cpk->privatekey != NULL))?1:0;
1082         cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
1083         dsa_sign=((cpk->x509 != NULL) && (cpk->privatekey != NULL))?1:0;
1084         cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
1085         dh_rsa=  ((cpk->x509 != NULL) && (cpk->privatekey != NULL))?1:0;
1086         dh_rsa_export=(dh_rsa && (EVP_PKEY_size(cpk->privatekey)*8 <= 512))?1:0;
1087         cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
1088 /* FIX THIS EAY EAY EAY */
1089         dh_dsa=  ((cpk->x509 != NULL) && (cpk->privatekey != NULL))?1:0;
1090         dh_dsa_export=(dh_dsa && (EVP_PKEY_size(cpk->privatekey)*8 <= 512))?1:0;
1091
1092         mask=0;
1093         emask=0;
1094
1095 #ifdef CIPHER_DEBUG
1096         printf("rt=%d dht=%d re=%d rs=%d ds=%d dhr=%d dhd=%d\n",
1097                 rsa_tmp,dh_tmp,
1098                 rsa_enc,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
1099 #endif
1100
1101         if (rsa_enc || (rsa_tmp && rsa_sign))
1102                 mask|=SSL_kRSA;
1103         if (rsa_enc_export || (rsa_tmp_export && rsa_sign))
1104                 emask|=SSL_kRSA;
1105
1106 #if 0
1107         /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
1108         if (    (dh_tmp || dh_rsa || dh_dsa) &&
1109                 (rsa_enc || rsa_sign || dsa_sign))
1110                 mask|=SSL_kEDH;
1111         if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
1112                 (rsa_enc || rsa_sign || dsa_sign))
1113                 emask|=SSL_kEDH;
1114 #endif
1115
1116         if (dh_tmp_export)
1117                 emask|=SSL_kEDH;
1118
1119         if (dh_tmp)
1120                 mask|=SSL_kEDH;
1121
1122         if (dh_rsa) mask|=SSL_kDHr;
1123         if (dh_rsa_export) emask|=SSL_kDHr;
1124
1125         if (dh_dsa) mask|=SSL_kDHd;
1126         if (dh_dsa_export) emask|=SSL_kDHd;
1127
1128         if (rsa_enc || rsa_sign)
1129                 {
1130                 mask|=SSL_aRSA;
1131                 emask|=SSL_aRSA;
1132                 }
1133
1134         if (dsa_sign)
1135                 {
1136                 mask|=SSL_aDSS;
1137                 emask|=SSL_aDSS;
1138                 }
1139
1140 #ifdef SSL_ALLOW_ADH
1141         mask|=SSL_aNULL;
1142         emask|=SSL_aNULL;
1143 #endif
1144
1145         c->mask=mask;
1146         c->export_mask=emask;
1147         c->valid=1;
1148         }
1149
1150 /* THIS NEEDS CLEANING UP */
1151 X509 *ssl_get_server_send_cert(s)
1152 SSL *s;
1153         {
1154         unsigned long alg,mask,kalg;
1155         CERT *c;
1156         int i,export;
1157
1158         c=s->cert;
1159         ssl_set_cert_masks(c);
1160         alg=s->s3->tmp.new_cipher->algorithms;
1161         export=(alg & SSL_EXPORT)?1:0;
1162         mask=(export)?c->export_mask:c->mask;
1163         kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);
1164
1165         if      (kalg & SSL_kDHr)
1166                 i=SSL_PKEY_DH_RSA;
1167         else if (kalg & SSL_kDHd)
1168                 i=SSL_PKEY_DH_DSA;
1169         else if (kalg & SSL_aDSS)
1170                 i=SSL_PKEY_DSA_SIGN;
1171         else if (kalg & SSL_aRSA)
1172                 {
1173                 if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
1174                         i=SSL_PKEY_RSA_SIGN;
1175                 else
1176                         i=SSL_PKEY_RSA_ENC;
1177                 }
1178         else /* if (kalg & SSL_aNULL) */
1179                 {
1180                 SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,SSL_R_INTERNAL_ERROR);
1181                 return(NULL);
1182                 }
1183         if (c->pkeys[i].x509 == NULL) return(NULL);
1184         return(c->pkeys[i].x509);
1185         }
1186
1187 EVP_PKEY *ssl_get_sign_pkey(s,cipher)
1188 SSL *s;
1189 SSL_CIPHER *cipher;
1190         {
1191         unsigned long alg;
1192         CERT *c;
1193
1194         alg=cipher->algorithms;
1195         c=s->cert;
1196
1197         if ((alg & SSL_aDSS) &&
1198                 (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
1199                 return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
1200         else if (alg & SSL_aRSA)
1201                 {
1202                 if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
1203                         return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);
1204                 else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
1205                         return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);
1206                 else
1207                         return(NULL);
1208                 }
1209         else /* if (alg & SSL_aNULL) */
1210                 {
1211                 SSLerr(SSL_F_SSL_GET_SIGN_PKEY,SSL_R_INTERNAL_ERROR);
1212                 return(NULL);
1213                 }
1214         }
1215
1216 void ssl_update_cache(s,mode)
1217 SSL *s;
1218 int mode;
1219         {
1220         int i;
1221
1222         /* If the session_id_length is 0, we are not supposed to cache it,
1223          * and it would be rather hard to do anyway :-) */
1224         if (s->session->session_id_length == 0) return;
1225
1226         if ((s->ctx->session_cache_mode & mode)
1227                 && (!s->hit)
1228                 && SSL_CTX_add_session(s->ctx,s->session)
1229                 && (s->ctx->new_session_cb != NULL))
1230                 {
1231                 CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
1232                 if (!s->ctx->new_session_cb(s,s->session))
1233                         SSL_SESSION_free(s->session);
1234                 }
1235
1236         /* auto flush every 255 connections */
1237         i=s->ctx->session_cache_mode;
1238         if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
1239                 ((i & mode) == mode))
1240                 {
1241                 if (  (((mode & SSL_SESS_CACHE_CLIENT)
1242                         ?s->ctx->sess_connect_good
1243                         :s->ctx->sess_accept_good) & 0xff) == 0xff)
1244                         {
1245                         SSL_CTX_flush_sessions(s->ctx,time(NULL));
1246                         }
1247                 }
1248         }
1249
1250 SSL_METHOD *SSL_get_ssl_method(s)
1251 SSL *s;
1252         {
1253         return(s->method);
1254         }
1255
1256 int SSL_set_ssl_method(s,meth)
1257 SSL *s;
1258 SSL_METHOD *meth;
1259         {
1260         int conn= -1;
1261         int ret=1;
1262
1263         if (s->method != meth)
1264                 {
1265                 if (s->handshake_func != NULL)
1266                         conn=(s->handshake_func == s->method->ssl_connect);
1267
1268                 if (s->method->version == meth->version)
1269                         s->method=meth;
1270                 else
1271                         {
1272                         s->method->ssl_free(s);
1273                         s->method=meth;
1274                         ret=s->method->ssl_new(s);
1275                         }
1276
1277                 if (conn == 1)
1278                         s->handshake_func=meth->ssl_connect;
1279                 else if (conn == 0)
1280                         s->handshake_func=meth->ssl_accept;
1281                 }
1282         return(ret);
1283         }
1284
1285 int SSL_get_error(s,i)
1286 SSL *s;
1287 int i;
1288         {
1289         int reason;
1290         BIO *bio;
1291
1292         if (i > 0) return(SSL_ERROR_NONE);
1293
1294         if (ERR_peek_error() != 0)
1295                 return(SSL_ERROR_SSL);
1296
1297         if ((i < 0) && SSL_want_read(s))
1298                 {
1299                 bio=SSL_get_rbio(s);
1300                 if (BIO_should_read(bio))
1301                         return(SSL_ERROR_WANT_READ);
1302                 else if (BIO_should_write(bio))
1303                         return(SSL_ERROR_WANT_WRITE);
1304                 else if (BIO_should_io_special(bio))
1305                         {
1306                         reason=BIO_get_retry_reason(bio);
1307                         if (reason == BIO_RR_CONNECT)
1308                                 return(SSL_ERROR_WANT_CONNECT);
1309                         else
1310                                 return(SSL_ERROR_SYSCALL); /* unknown */
1311                         }
1312                 }
1313
1314         if ((i < 0) && SSL_want_write(s))
1315                 {
1316                 bio=SSL_get_wbio(s);
1317                 if (BIO_should_write(bio))
1318                         return(SSL_ERROR_WANT_WRITE);
1319                 else if (BIO_should_read(bio))
1320                         return(SSL_ERROR_WANT_READ);
1321                 else if (BIO_should_io_special(bio))
1322                         {
1323                         reason=BIO_get_retry_reason(bio);
1324                         if (reason == BIO_RR_CONNECT)
1325                                 return(SSL_ERROR_WANT_CONNECT);
1326                         else
1327                                 return(SSL_ERROR_SYSCALL);
1328                         }
1329                 }
1330         if ((i < 0) && SSL_want_x509_lookup(s))
1331                 {
1332                 return(SSL_ERROR_WANT_X509_LOOKUP);
1333                 }
1334
1335         if (i == 0)
1336                 {
1337                 if (s->version == SSL2_VERSION)
1338                         {
1339                         /* assume it is the socket being closed */
1340                         return(SSL_ERROR_ZERO_RETURN);
1341                         }
1342                 else
1343                         {
1344                         if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
1345                                 (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
1346                                 return(SSL_ERROR_ZERO_RETURN);
1347                         }
1348                 }
1349         return(SSL_ERROR_SYSCALL);
1350         }
1351
1352 int SSL_do_handshake(s)
1353 SSL *s;
1354         {
1355         int ret=1;
1356
1357         if (s->handshake_func == NULL)
1358                 {
1359                 SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
1360                 return(-1);
1361                 }
1362
1363         s->method->ssl_renegotiate_check(s);
1364
1365         if (SSL_in_init(s) || SSL_in_before(s))
1366                 {
1367                 ret=s->handshake_func(s);
1368                 }
1369         return(ret);
1370         }
1371
1372 /* For the next 2 functions, SSL_clear() sets shutdown and so
1373  * one of these calls will reset it */
1374 void SSL_set_accept_state(s)
1375 SSL *s;
1376         {
1377         s->shutdown=0;
1378         s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
1379         s->handshake_func=s->method->ssl_accept;
1380         /* clear the current cipher */
1381         ssl_clear_cipher_ctx(s);
1382         }
1383
1384 void SSL_set_connect_state(s)
1385 SSL *s;
1386         {
1387         s->shutdown=0;
1388         s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
1389         s->handshake_func=s->method->ssl_connect;
1390         /* clear the current cipher */
1391         ssl_clear_cipher_ctx(s);
1392         }
1393
1394 int ssl_undefined_function(s)
1395 SSL *s;
1396         {
1397         SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1398         return(0);
1399         }
1400
1401 SSL_METHOD *ssl_bad_method(ver)
1402 int ver;
1403         {
1404         SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
1405         return(NULL);
1406         }
1407
1408 char *SSL_get_version(s)
1409 SSL *s;
1410         {
1411         if (s->version == TLS1_VERSION)
1412                 return("TLSv1");
1413         else if (s->version == SSL3_VERSION)
1414                 return("SSLv3");
1415         else if (s->version == SSL2_VERSION)
1416                 return("SSLv2");
1417         else
1418                 return("unknown");
1419         }
1420
1421 SSL *SSL_dup(s)
1422 SSL *s;
1423         {
1424         STACK *sk;
1425         X509_NAME *xn;
1426         SSL *ret;
1427         int i;
1428
1429         if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL) return(NULL);
1430
1431         /* This copies version, session-id, SSL_METHOD and 'cert' */
1432         SSL_copy_session_id(ret,s);
1433
1434         SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
1435         SSL_set_verify(ret,SSL_get_verify_mode(s),
1436                 SSL_get_verify_callback(s));
1437
1438         SSL_set_info_callback(ret,SSL_get_info_callback(s));
1439
1440         ret->debug=s->debug;
1441         ret->options=s->options;
1442
1443         /* copy app data, a little dangerous perhaps */
1444         if (!CRYPTO_dup_ex_data(ssl_meth,&ret->ex_data,&s->ex_data))
1445                 goto err;
1446
1447         /* setup rbio, and wbio */
1448         if (s->rbio != NULL)
1449                 {
1450                 if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
1451                         goto err;
1452                 }
1453         if (s->wbio != NULL)
1454                 {
1455                 if (s->wbio != s->rbio)
1456                         {
1457                         if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
1458                                 goto err;
1459                         }
1460                 else
1461                         ret->wbio=ret->rbio;
1462                 }
1463
1464         /* dup the cipher_list and cipher_list_by_id stacks */
1465         if (s->cipher_list != NULL)
1466                 {
1467                 if ((ret->cipher_list=sk_dup(s->cipher_list)) == NULL)
1468                         goto err;
1469                 }
1470         if (s->cipher_list_by_id != NULL)
1471                 if ((ret->cipher_list_by_id=sk_dup(s->cipher_list_by_id))
1472                         == NULL)
1473                         goto err;
1474
1475         /* Dup the client_CA list */
1476         if (s->client_CA != NULL)
1477                 {
1478                 if ((sk=sk_dup(s->client_CA)) == NULL) goto err;
1479                 ret->client_CA=sk;
1480                 for (i=0; i<sk_num(sk); i++)
1481                         {
1482                         xn=(X509_NAME *)sk_value(sk,i);
1483                         if ((sk_value(sk,i)=(char *)X509_NAME_dup(xn)) == NULL)
1484                                 {
1485                                 X509_NAME_free(xn);
1486                                 goto err;
1487                                 }
1488                         }
1489                 }
1490
1491         ret->shutdown=s->shutdown;
1492         ret->state=s->state;
1493         ret->handshake_func=s->handshake_func;
1494
1495         if (0)
1496                 {
1497 err:
1498                 if (ret != NULL) SSL_free(ret);
1499                 ret=NULL;
1500                 }
1501         return(ret);
1502         }
1503
1504 void ssl_clear_cipher_ctx(s)
1505 SSL *s;
1506         {
1507         if (s->enc_read_ctx != NULL)
1508                 {
1509                 EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
1510                 Free(s->enc_read_ctx);
1511                 s->enc_read_ctx=NULL;
1512                 }
1513         if (s->enc_write_ctx != NULL)
1514                 {
1515                 EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
1516                 Free(s->enc_write_ctx);
1517                 s->enc_write_ctx=NULL;
1518                 }
1519         }
1520
1521 /* Fix this function so that it takes an optional type parameter */
1522 X509 *SSL_get_certificate(s)
1523 SSL *s;
1524         {
1525         if (s->cert != NULL)
1526                 return(s->cert->key->x509);
1527         else
1528                 return(NULL);
1529         }
1530
1531 /* Fix this function so that it takes an optional type parameter */
1532 EVP_PKEY *SSL_get_privatekey(s)
1533 SSL *s;
1534         {
1535         if (s->cert != NULL)
1536                 return(s->cert->key->privatekey);
1537         else
1538                 return(NULL);
1539         }
1540
1541 SSL_CIPHER *SSL_get_current_cipher(s)
1542 SSL *s;
1543         {
1544         if ((s->session != NULL) && (s->session->cipher != NULL))
1545                 return(s->session->cipher);
1546         return(NULL);
1547         }
1548
1549 int ssl_init_wbio_buffer(s,push)
1550 SSL *s;
1551 int push;
1552         {
1553         BIO *bbio;
1554
1555         if (s->bbio == NULL)
1556                 {
1557                 bbio=BIO_new(BIO_f_buffer());
1558                 if (bbio == NULL) return(0);
1559                 s->bbio=bbio;
1560                 }
1561         else
1562                 {
1563                 bbio=s->bbio;
1564                 if (s->bbio == s->wbio)
1565                         s->wbio=BIO_pop(s->wbio);
1566                 }
1567         BIO_reset(bbio);
1568 /*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
1569         if (!BIO_set_read_buffer_size(bbio,1))
1570                 {
1571                 SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
1572                 return(0);
1573                 }
1574         if (push)
1575                 {
1576                 if (s->wbio != bbio)
1577                         s->wbio=BIO_push(bbio,s->wbio);
1578                 }
1579         else
1580                 {
1581                 if (s->wbio == bbio)
1582                         s->wbio=BIO_pop(bbio);
1583                 }
1584         return(1);
1585         }
1586
1587 void SSL_CTX_set_quiet_shutdown(ctx,mode)
1588 SSL_CTX *ctx;
1589 int mode;
1590         {
1591         ctx->quiet_shutdown=mode;
1592         }
1593
1594 int SSL_CTX_get_quiet_shutdown(ctx)
1595 SSL_CTX *ctx;
1596         {
1597         return(ctx->quiet_shutdown);
1598         }
1599
1600 void SSL_set_quiet_shutdown(s,mode)
1601 SSL *s;
1602 int mode;
1603         {
1604         s->quiet_shutdown=mode;
1605         }
1606
1607 int SSL_get_quiet_shutdown(s)
1608 SSL *s;
1609         {
1610         return(s->quiet_shutdown);
1611         }
1612
1613 void SSL_set_shutdown(s,mode)
1614 SSL *s;
1615 int mode;
1616         {
1617         s->shutdown=mode;
1618         }
1619
1620 int SSL_get_shutdown(s)
1621 SSL *s;
1622         {
1623         return(s->shutdown);
1624         }
1625
1626 int SSL_version(s)
1627 SSL *s;
1628         {
1629         return(s->version);
1630         }
1631
1632 SSL_CTX *SSL_get_SSL_CTX(ssl)
1633 SSL *ssl;
1634         {
1635         return(ssl->ctx);
1636         }
1637
1638 #ifndef NO_STDIO
1639 int SSL_CTX_set_default_verify_paths(ctx)
1640 SSL_CTX *ctx;
1641         {
1642         return(X509_STORE_set_default_paths(ctx->cert_store));
1643         }
1644
1645 int SSL_CTX_load_verify_locations(ctx,CAfile,CApath)
1646 SSL_CTX *ctx;
1647 char *CAfile;
1648 char *CApath;
1649         {
1650         return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
1651         }
1652 #endif
1653
1654 void SSL_set_info_callback(ssl,cb)
1655 SSL *ssl;
1656 void (*cb)();
1657         {
1658         ssl->info_callback=cb;
1659         }
1660
1661 void (*SSL_get_info_callback(ssl))()
1662 SSL *ssl;
1663         {
1664         return((void (*)())ssl->info_callback);
1665         }
1666
1667 int SSL_state(ssl)
1668 SSL *ssl;
1669         {
1670         return(ssl->state);
1671         }
1672
1673 void SSL_set_verify_result(ssl,arg)
1674 SSL *ssl;
1675 long arg;
1676         {
1677         ssl->verify_result=arg;
1678         }
1679
1680 long SSL_get_verify_result(ssl)
1681 SSL *ssl;
1682         {
1683         return(ssl->verify_result);
1684         }
1685
1686 int SSL_get_ex_new_index(argl,argp,new_func,dup_func,free_func)
1687 long argl;
1688 char *argp;
1689 int (*new_func)();
1690 int (*dup_func)();
1691 void (*free_func)();
1692         {
1693         ssl_meth_num++;
1694         return(CRYPTO_get_ex_new_index(ssl_meth_num-1,
1695                 &ssl_meth,argl,argp,new_func,dup_func,free_func));
1696         }
1697
1698 int SSL_set_ex_data(s,idx,arg)
1699 SSL *s;
1700 int idx;
1701 char *arg;
1702         {
1703         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1704         }
1705
1706 char *SSL_get_ex_data(s,idx)
1707 SSL *s;
1708 int idx;
1709         {
1710         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1711         }
1712
1713 int SSL_CTX_get_ex_new_index(argl,argp,new_func,dup_func,free_func)
1714 long argl;
1715 char *argp;
1716 int (*new_func)();
1717 int (*dup_func)();
1718 void (*free_func)();
1719         {
1720         ssl_ctx_meth_num++;
1721         return(CRYPTO_get_ex_new_index(ssl_ctx_meth_num-1,
1722                 &ssl_ctx_meth,argl,argp,new_func,dup_func,free_func));
1723         }
1724
1725 int SSL_CTX_set_ex_data(s,idx,arg)
1726 SSL_CTX *s;
1727 int idx;
1728 char *arg;
1729         {
1730         return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
1731         }
1732
1733 char *SSL_CTX_get_ex_data(s,idx)
1734 SSL_CTX *s;
1735 int idx;
1736         {
1737         return(CRYPTO_get_ex_data(&s->ex_data,idx));
1738         }
1739
1740 int ssl_ok(s)
1741 SSL *s;
1742         {
1743         return(1);
1744         }
1745
1746 #if defined(_WINDLL) && defined(WIN16)
1747 #include "../crypto/bio/bss_file.c"
1748 #endif
1749