apps/s_cb.c

   1 /* apps/s_cb.c - callback functions used by s_client, s_server, and s_time */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58 /* ====================================================================
  59  * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
  60  *
  61  * Redistribution and use in source and binary forms, with or without
  62  * modification, are permitted provided that the following conditions
  63  * are met:
  64  *
  65  * 1. Redistributions of source code must retain the above copyright
  66  *    notice, this list of conditions and the following disclaimer.
  67  *
  68  * 2. Redistributions in binary form must reproduce the above copyright
  69  *    notice, this list of conditions and the following disclaimer in
  70  *    the documentation and/or other materials provided with the
  71  *    distribution.
  72  *
  73  * 3. All advertising materials mentioning features or use of this
  74  *    software must display the following acknowledgment:
  75  *    "This product includes software developed by the OpenSSL Project
  76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  77  *
  78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  79  *    endorse or promote products derived from this software without
  80  *    prior written permission. For written permission, please contact
  81  *    openssl-core@openssl.org.
  82  *
  83  * 5. Products derived from this software may not be called "OpenSSL"
  84  *    nor may "OpenSSL" appear in their names without prior written
  85  *    permission of the OpenSSL Project.
  86  *
  87  * 6. Redistributions of any form whatsoever must retain the following
  88  *    acknowledgment:
  89  *    "This product includes software developed by the OpenSSL Project
  90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  91  *
  92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 103  * OF THE POSSIBILITY OF SUCH DAMAGE.
 104  * ====================================================================
 105  *
 106  * This product includes cryptographic software written by Eric Young
 107  * (eay@cryptsoft.com).  This product includes software written by Tim
 108  * Hudson (tjh@cryptsoft.com).
 109  *
 110  */
 111
 112 #include <stdio.h>
 113 #include <stdlib.h>
 114 #define USE_SOCKETS
 115 #define NON_MAIN
 116 #include "apps.h"
 117 #undef NON_MAIN
 118 #undef USE_SOCKETS
 119 #include <openssl/err.h>
 120 #include <openssl/rand.h>
 121 #include <openssl/x509.h>
 122 #include <openssl/ssl.h>
 123 #include <openssl/bn.h>
 124 #ifndef OPENSSL_NO_DH
 125 #include <openssl/dh.h>
 126 #endif
 127 #include "s_apps.h"
 128
 129 #define COOKIE_SECRET_LENGTH    16
 130
 131 int verify_depth=0;
 132 int verify_quiet=0;
 133 int verify_error=X509_V_OK;
 134 int verify_return_error=0;
 135 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
 136 int cookie_initialized=0;
 137
 138 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
 139         {
 140         X509 *err_cert;
 141         int err,depth;
 142
 143         err_cert=X509_STORE_CTX_get_current_cert(ctx);
 144         err=    X509_STORE_CTX_get_error(ctx);
 145         depth=  X509_STORE_CTX_get_error_depth(ctx);
 146
 147         if (!verify_quiet || !ok)
 148                 {
 149                 BIO_printf(bio_err,"depth=%d ",depth);
 150                 if (err_cert)
 151                         {
 152                         X509_NAME_print_ex(bio_err,
 153                                         X509_get_subject_name(err_cert),
 154                                         0, XN_FLAG_ONELINE);
 155                         BIO_puts(bio_err, "\n");
 156                         }
 157                 else
 158                         BIO_puts(bio_err, "<no cert>\n");
 159                 }
 160         if (!ok)
 161                 {
 162                 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
 163                         X509_verify_cert_error_string(err));
 164                 if (verify_depth >= depth)
 165                         {
 166                         if (!verify_return_error)
 167                                 ok=1;
 168                         verify_error=X509_V_OK;
 169                         }
 170                 else
 171                         {
 172                         ok=0;
 173                         verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
 174                         }
 175                 }
 176         switch (err)
 177                 {
 178         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 179                 BIO_puts(bio_err,"issuer= ");
 180                 X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
 181                                         0, XN_FLAG_ONELINE);
 182                 BIO_puts(bio_err, "\n");
 183                 break;
 184         case X509_V_ERR_CERT_NOT_YET_VALID:
 185         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 186                 BIO_printf(bio_err,"notBefore=");
 187                 ASN1_TIME_print(bio_err,X509_get_notBefore(err_cert));
 188                 BIO_printf(bio_err,"\n");
 189                 break;
 190         case X509_V_ERR_CERT_HAS_EXPIRED:
 191         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 192                 BIO_printf(bio_err,"notAfter=");
 193                 ASN1_TIME_print(bio_err,X509_get_notAfter(err_cert));
 194                 BIO_printf(bio_err,"\n");
 195                 break;
 196         case X509_V_ERR_NO_EXPLICIT_POLICY:
 197                 if (!verify_quiet)
 198                         policies_print(bio_err, ctx);
 199                 break;
 200                 }
 201         if (err == X509_V_OK && ok == 2 && !verify_quiet)
 202                 policies_print(bio_err, ctx);
 203         if (ok && !verify_quiet)
 204                 BIO_printf(bio_err,"verify return:%d\n",ok);
 205         return(ok);
 206         }
 207
 208 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
 209         {
 210         if (cert_file != NULL)
 211                 {
 212                 /*
 213                 SSL *ssl;
 214                 X509 *x509;
 215                 */
 216
 217                 if (SSL_CTX_use_certificate_file(ctx,cert_file,
 218                         SSL_FILETYPE_PEM) <= 0)
 219                         {
 220                         BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file);
 221                         ERR_print_errors(bio_err);
 222                         return(0);
 223                         }
 224                 if (key_file == NULL) key_file=cert_file;
 225                 if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
 226                         SSL_FILETYPE_PEM) <= 0)
 227                         {
 228                         BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file);
 229                         ERR_print_errors(bio_err);
 230                         return(0);
 231                         }
 232
 233                 /*
 234                 In theory this is no longer needed
 235                 ssl=SSL_new(ctx);
 236                 x509=SSL_get_certificate(ssl);
 237
 238                 if (x509 != NULL) {
 239                         EVP_PKEY *pktmp;
 240                         pktmp = X509_get_pubkey(x509);
 241                         EVP_PKEY_copy_parameters(pktmp,
 242                                                 SSL_get_privatekey(ssl));
 243                         EVP_PKEY_free(pktmp);
 244                 }
 245                 SSL_free(ssl);
 246                 */
 247
 248                 /* If we are using DSA, we can copy the parameters from
 249                  * the private key */
 250
 251
 252                 /* Now we know that a key and cert have been set against
 253                  * the SSL context */
 254                 if (!SSL_CTX_check_private_key(ctx))
 255                         {
 256                         BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 257                         return(0);
 258                         }
 259                 }
 260         return(1);
 261         }
 262
 263 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key,
 264                        STACK_OF(X509) *chain, int build_chain)
 265         {
 266         int chflags = chain ? SSL_BUILD_CHAIN_FLAG_CHECK : 0;
 267         if (cert == NULL)
 268                 return 1;
 269         if (SSL_CTX_use_certificate(ctx,cert) <= 0)
 270                 {
 271                 BIO_printf(bio_err,"error setting certificate\n");
 272                 ERR_print_errors(bio_err);
 273                 return 0;
 274                 }
 275
 276         if (SSL_CTX_use_PrivateKey(ctx,key) <= 0)
 277                 {
 278                 BIO_printf(bio_err,"error setting private key\n");
 279                 ERR_print_errors(bio_err);
 280                 return 0;
 281                 }
 282
 283         /* Now we know that a key and cert have been set against
 284          * the SSL context */
 285         if (!SSL_CTX_check_private_key(ctx))
 286                 {
 287                 BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 288                 return 0;
 289                 }
 290         if (chain && !SSL_CTX_set1_chain(ctx, chain))
 291                 {
 292                 BIO_printf(bio_err,"error setting certificate chain\n");
 293                 ERR_print_errors(bio_err);
 294                 return 0;
 295                 }
 296         if (build_chain && !SSL_CTX_build_cert_chain(ctx, chflags))
 297                 {
 298                 BIO_printf(bio_err,"error building certificate chain\n");
 299                 ERR_print_errors(bio_err);
 300                 return 0;
 301                 }
 302         return 1;
 303         }
 304
 305 static void ssl_print_client_cert_types(BIO *bio, SSL *s)
 306         {
 307         const unsigned char *p;
 308         int i;
 309         int cert_type_num = SSL_get0_certificate_types(s, &p);
 310         if (!cert_type_num)
 311                 return;
 312         BIO_puts(bio, "Client Certificate Types: ");
 313         for (i = 0; i < cert_type_num; i++)
 314                 {
 315                 unsigned char cert_type = p[i];
 316                 char *cname;
 317                 switch(cert_type)
 318                         {
 319                 case TLS_CT_RSA_SIGN:
 320                         cname = "RSA sign";
 321                         break;
 322
 323                 case TLS_CT_DSS_SIGN:
 324                         cname = "DSA sign";
 325                         break;
 326
 327                 case TLS_CT_RSA_FIXED_DH:
 328                         cname = "RSA fixed DH";
 329                         break;
 330
 331                 case TLS_CT_DSS_FIXED_DH:
 332                         cname = "DSS fixed DH";
 333                         break;
 334
 335                 case TLS_CT_ECDSA_SIGN:
 336                         cname = "ECDSA sign";
 337                         break;
 338
 339                 case TLS_CT_RSA_FIXED_ECDH:
 340                         cname = "RSA fixed ECDH";
 341                         break;
 342
 343                 case TLS_CT_ECDSA_FIXED_ECDH:
 344                         cname = "ECDSA fixed ECDH";
 345                         break;
 346
 347                 case TLS_CT_GOST94_SIGN:
 348                         cname = "GOST94 Sign";
 349                         break;
 350
 351                 case TLS_CT_GOST01_SIGN:
 352                         cname = "GOST01 Sign";
 353                         break;
 354
 355                 default:
 356                          cname = NULL;
 357                         }
 358
 359                 if (i)
 360                         BIO_puts(bio, ", ");
 361
 362                 if (cname)
 363                         BIO_puts(bio, cname);
 364                 else
 365                         BIO_printf(bio, "UNKNOWN (%d),", cert_type);
 366                 }
 367         BIO_puts(bio, "\n");
 368         }
 369
 370 static int do_print_sigalgs(BIO *out, SSL *s, int shared)
 371         {
 372         int i, nsig, client;
 373         client = SSL_is_server(s) ? 0 : 1;
 374         if (shared)
 375                 nsig = SSL_get_shared_sigalgs(s, -1, NULL, NULL, NULL,
 376                                                         NULL, NULL);
 377         else
 378                 nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
 379         if (nsig == 0)
 380                 return 1;
 381
 382         if (shared)
 383                 BIO_puts(out, "Shared ");
 384
 385         if (client)
 386                 BIO_puts(out, "Requested ");
 387         BIO_puts(out, "Signature Algorithms: ");
 388         for (i = 0; i < nsig; i++)
 389                 {
 390                 int hash_nid, sign_nid;
 391                 unsigned char rhash, rsign;
 392                 const char *sstr = NULL;
 393                 if (shared)
 394                         SSL_get_shared_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 395                                                         &rsign, &rhash);
 396                 else
 397                         SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 398                                                         &rsign, &rhash);
 399                 if (i)
 400                         BIO_puts(out, ":");
 401                 if (sign_nid == EVP_PKEY_RSA)
 402                         sstr = "RSA";
 403                 else if(sign_nid == EVP_PKEY_DSA)
 404                         sstr = "DSA";
 405                 else if(sign_nid == EVP_PKEY_EC)
 406                         sstr = "ECDSA";
 407                 if (sstr)
 408                         BIO_printf(out,"%s+", sstr);
 409                 else
 410                         BIO_printf(out,"0x%02X+", (int)rsign);
 411                 if (hash_nid != NID_undef)
 412                         BIO_printf(out, "%s", OBJ_nid2sn(hash_nid));
 413                 else
 414                         BIO_printf(out,"0x%02X", (int)rhash);
 415                 }
 416         BIO_puts(out, "\n");
 417         return 1;
 418         }
 419
 420 int ssl_print_sigalgs(BIO *out, SSL *s)
 421         {
 422         int mdnid;
 423         if (!SSL_is_server(s))
 424                 ssl_print_client_cert_types(out, s);
 425         do_print_sigalgs(out, s, 0);
 426         do_print_sigalgs(out, s, 1);
 427         if (SSL_get_peer_signature_nid(s, &mdnid))
 428                 BIO_printf(out, "Peer signing digest: %s\n", OBJ_nid2sn(mdnid));
 429         return 1;
 430         }
 431 #ifndef OPENSSL_NO_EC
 432 int ssl_print_point_formats(BIO *out, SSL *s)
 433         {
 434         int i, nformats;
 435         const char *pformats;
 436         nformats = SSL_get0_ec_point_formats(s, &pformats);
 437         if (nformats <= 0)
 438                 return 1;
 439         BIO_puts(out, "Supported Elliptic Curve Point Formats: ");
 440         for (i = 0; i < nformats; i++, pformats++)
 441                 {
 442                 if (i)
 443                         BIO_puts(out, ":");
 444                 switch(*pformats)
 445                         {
 446                 case TLSEXT_ECPOINTFORMAT_uncompressed:
 447                         BIO_puts(out, "uncompressed");
 448                         break;
 449
 450                 case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime:
 451                         BIO_puts(out, "ansiX962_compressed_prime");
 452                         break;
 453
 454                 case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2:
 455                         BIO_puts(out, "ansiX962_compressed_char2");
 456                         break;
 457
 458                 default:
 459                         BIO_printf(out, "unknown(%d)", (int)*pformats);
 460                         break;
 461
 462                         }
 463                 }
 464         if (nformats <= 0)
 465                 BIO_puts(out, "NONE");
 466         BIO_puts(out, "\n");
 467         return 1;
 468         }
 469
 470 int ssl_print_curves(BIO *out, SSL *s, int noshared)
 471         {
 472         int i, ncurves, *curves, nid;
 473         const char *cname;
 474         ncurves = SSL_get1_curves(s, NULL);
 475         if (ncurves <= 0)
 476                 return 1;
 477         curves = OPENSSL_malloc(ncurves * sizeof(int));
 478         SSL_get1_curves(s, curves);
 479
 480         BIO_puts(out, "Supported Elliptic Curves: ");
 481         for (i = 0; i < ncurves; i++)
 482                 {
 483                 if (i)
 484                         BIO_puts(out, ":");
 485                 nid = curves[i];
 486                 /* If unrecognised print out hex version */
 487                 if (nid & TLSEXT_nid_unknown)
 488                         BIO_printf(out, "0x%04X", nid & 0xFFFF);
 489                 else
 490                         {
 491                         /* Use NIST name for curve if it exists */
 492                         cname = EC_curve_nid2nist(nid);
 493                         if (!cname)
 494                                 cname = OBJ_nid2sn(nid);
 495                         BIO_printf(out, "%s", cname);
 496                         }
 497                 }
 498         if (ncurves == 0)
 499                 BIO_puts(out, "NONE");
 500         OPENSSL_free(curves);
 501         if (noshared)
 502                 {
 503                 BIO_puts(out, "\n");
 504                 return 1;
 505                 }
 506         BIO_puts(out, "\nShared Elliptic curves: ");
 507         ncurves = SSL_get_shared_curve(s, -1);
 508         for (i = 0; i < ncurves; i++)
 509                 {
 510                 if (i)
 511                         BIO_puts(out, ":");
 512                 nid = SSL_get_shared_curve(s, i);
 513                 cname = EC_curve_nid2nist(nid);
 514                 if (!cname)
 515                         cname = OBJ_nid2sn(nid);
 516                 BIO_printf(out, "%s", cname);
 517                 }
 518         if (ncurves == 0)
 519                 BIO_puts(out, "NONE");
 520         BIO_puts(out, "\n");
 521         return 1;
 522         }
 523 #endif
 524 int ssl_print_tmp_key(BIO *out, SSL *s)
 525         {
 526         EVP_PKEY *key;
 527         if (!SSL_get_server_tmp_key(s, &key))
 528                 return 1;
 529         BIO_puts(out, "Server Temp Key: ");
 530         switch (EVP_PKEY_id(key))
 531                 {
 532         case EVP_PKEY_RSA:
 533                 BIO_printf(out, "RSA, %d bits\n", EVP_PKEY_bits(key));
 534                 break;
 535
 536         case EVP_PKEY_DH:
 537                 BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(key));
 538                 break;
 539 #ifndef OPENSSL_NO_ECDH
 540         case EVP_PKEY_EC:
 541                         {
 542                         EC_KEY *ec = EVP_PKEY_get1_EC_KEY(key);
 543                         int nid;
 544                         const char *cname;
 545                         nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
 546                         EC_KEY_free(ec);
 547                         cname = EC_curve_nid2nist(nid);
 548                         if (!cname)
 549                                 cname = OBJ_nid2sn(nid);
 550                         BIO_printf(out, "ECDH, %s, %d bits\n",
 551                                                 cname, EVP_PKEY_bits(key));
 552                         }
 553 #endif
 554                 }
 555         EVP_PKEY_free(key);
 556         return 1;
 557         }
 558
 559
 560 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
 561                                    int argi, long argl, long ret)
 562         {
 563         BIO *out;
 564
 565         out=(BIO *)BIO_get_callback_arg(bio);
 566         if (out == NULL) return(ret);
 567
 568         if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
 569                 {
 570                 BIO_printf(out,"read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 571                         (void *)bio,argp,(unsigned long)argi,ret,ret);
 572                 BIO_dump(out,argp,(int)ret);
 573                 return(ret);
 574                 }
 575         else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
 576                 {
 577                 BIO_printf(out,"write to %p [%p] (%lu bytes => %ld (0x%lX))\n",
 578                         (void *)bio,argp,(unsigned long)argi,ret,ret);
 579                 BIO_dump(out,argp,(int)ret);
 580                 }
 581         return(ret);
 582         }
 583
 584 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
 585         {
 586         const char *str;
 587         int w;
 588
 589         w=where& ~SSL_ST_MASK;
 590
 591         if (w & SSL_ST_CONNECT) str="SSL_connect";
 592         else if (w & SSL_ST_ACCEPT) str="SSL_accept";
 593         else str="undefined";
 594
 595         if (where & SSL_CB_LOOP)
 596                 {
 597                 BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
 598                 }
 599         else if (where & SSL_CB_ALERT)
 600                 {
 601                 str=(where & SSL_CB_READ)?"read":"write";
 602                 BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
 603                         str,
 604                         SSL_alert_type_string_long(ret),
 605                         SSL_alert_desc_string_long(ret));
 606                 }
 607         else if (where & SSL_CB_EXIT)
 608                 {
 609                 if (ret == 0)
 610                         BIO_printf(bio_err,"%s:failed in %s\n",
 611                                 str,SSL_state_string_long(s));
 612                 else if (ret < 0)
 613                         {
 614                         BIO_printf(bio_err,"%s:error in %s\n",
 615                                 str,SSL_state_string_long(s));
 616                         }
 617                 }
 618         }
 619
 620 static const char *ssl_version_str(int version)
 621         {
 622         switch (version)
 623                 {
 624         case SSL2_VERSION:
 625                 return "SSL 2.0";
 626         case SSL3_VERSION:
 627                 return "SSL 3.0";
 628         case TLS1_VERSION:
 629                 return "TLS 1.0";
 630         case TLS1_1_VERSION:
 631                 return "TLS 1.1";
 632         case TLS1_2_VERSION:
 633                 return "TLS 1.2";
 634         case DTLS1_VERSION:
 635                 return "DTLS 1.0";
 636         case DTLS1_BAD_VER:
 637                 return "DTLS 1.0 (bad)";
 638         default:
 639                 return "???";
 640                 }
 641         }
 642
 643 void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
 644         {
 645         BIO *bio = arg;
 646         const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
 647
 648         str_write_p = write_p ? ">>>" : "<<<";
 649
 650         str_version = ssl_version_str(version);
 651
 652         if (version == SSL2_VERSION)
 653                 {
 654                 str_details1 = "???";
 655
 656                 if (len > 0)
 657                         {
 658                         switch (((const unsigned char*)buf)[0])
 659                                 {
 660                                 case 0:
 661                                         str_details1 = ", ERROR:";
 662                                         str_details2 = " ???";
 663                                         if (len >= 3)
 664                                                 {
 665                                                 unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
 666
 667                                                 switch (err)
 668                                                         {
 669                                                 case 0x0001:
 670                                                         str_details2 = " NO-CIPHER-ERROR";
 671                                                         break;
 672                                                 case 0x0002:
 673                                                         str_details2 = " NO-CERTIFICATE-ERROR";
 674                                                         break;
 675                                                 case 0x0004:
 676                                                         str_details2 = " BAD-CERTIFICATE-ERROR";
 677                                                         break;
 678                                                 case 0x0006:
 679                                                         str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
 680                                                         break;
 681                                                         }
 682                                                 }
 683
 684                                         break;
 685                                 case 1:
 686                                         str_details1 = ", CLIENT-HELLO";
 687                                         break;
 688                                 case 2:
 689                                         str_details1 = ", CLIENT-MASTER-KEY";
 690                                         break;
 691                                 case 3:
 692                                         str_details1 = ", CLIENT-FINISHED";
 693                                         break;
 694                                 case 4:
 695                                         str_details1 = ", SERVER-HELLO";
 696                                         break;
 697                                 case 5:
 698                                         str_details1 = ", SERVER-VERIFY";
 699                                         break;
 700                                 case 6:
 701                                         str_details1 = ", SERVER-FINISHED";
 702                                         break;
 703                                 case 7:
 704                                         str_details1 = ", REQUEST-CERTIFICATE";
 705                                         break;
 706                                 case 8:
 707                                         str_details1 = ", CLIENT-CERTIFICATE";
 708                                         break;
 709                                 }
 710                         }
 711                 }
 712
 713         if (version == SSL3_VERSION ||
 714             version == TLS1_VERSION ||
 715             version == TLS1_1_VERSION ||
 716             version == TLS1_2_VERSION ||
 717             version == DTLS1_VERSION ||
 718             version == DTLS1_BAD_VER)
 719                 {
 720                 switch (content_type)
 721                         {
 722                 case 20:
 723                         str_content_type = "ChangeCipherSpec";
 724                         break;
 725                 case 21:
 726                         str_content_type = "Alert";
 727                         break;
 728                 case 22:
 729                         str_content_type = "Handshake";
 730                         break;
 731                         }
 732
 733                 if (content_type == 21) /* Alert */
 734                         {
 735                         str_details1 = ", ???";
 736
 737                         if (len == 2)
 738                                 {
 739                                 switch (((const unsigned char*)buf)[0])
 740                                         {
 741                                 case 1:
 742                                         str_details1 = ", warning";
 743                                         break;
 744                                 case 2:
 745                                         str_details1 = ", fatal";
 746                                         break;
 747                                         }
 748
 749                                 str_details2 = " ???";
 750                                 switch (((const unsigned char*)buf)[1])
 751                                         {
 752                                 case 0:
 753                                         str_details2 = " close_notify";
 754                                         break;
 755                                 case 10:
 756                                         str_details2 = " unexpected_message";
 757                                         break;
 758                                 case 20:
 759                                         str_details2 = " bad_record_mac";
 760                                         break;
 761                                 case 21:
 762                                         str_details2 = " decryption_failed";
 763                                         break;
 764                                 case 22:
 765                                         str_details2 = " record_overflow";
 766                                         break;
 767                                 case 30:
 768                                         str_details2 = " decompression_failure";
 769                                         break;
 770                                 case 40:
 771                                         str_details2 = " handshake_failure";
 772                                         break;
 773                                 case 42:
 774                                         str_details2 = " bad_certificate";
 775                                         break;
 776                                 case 43:
 777                                         str_details2 = " unsupported_certificate";
 778                                         break;
 779                                 case 44:
 780                                         str_details2 = " certificate_revoked";
 781                                         break;
 782                                 case 45:
 783                                         str_details2 = " certificate_expired";
 784                                         break;
 785                                 case 46:
 786                                         str_details2 = " certificate_unknown";
 787                                         break;
 788                                 case 47:
 789                                         str_details2 = " illegal_parameter";
 790                                         break;
 791                                 case 48:
 792                                         str_details2 = " unknown_ca";
 793                                         break;
 794                                 case 49:
 795                                         str_details2 = " access_denied";
 796                                         break;
 797                                 case 50:
 798                                         str_details2 = " decode_error";
 799                                         break;
 800                                 case 51:
 801                                         str_details2 = " decrypt_error";
 802                                         break;
 803                                 case 60:
 804                                         str_details2 = " export_restriction";
 805                                         break;
 806                                 case 70:
 807                                         str_details2 = " protocol_version";
 808                                         break;
 809                                 case 71:
 810                                         str_details2 = " insufficient_security";
 811                                         break;
 812                                 case 80:
 813                                         str_details2 = " internal_error";
 814                                         break;
 815                                 case 90:
 816                                         str_details2 = " user_canceled";
 817                                         break;
 818                                 case 100:
 819                                         str_details2 = " no_renegotiation";
 820                                         break;
 821                                 case 110:
 822                                         str_details2 = " unsupported_extension";
 823                                         break;
 824                                 case 111:
 825                                         str_details2 = " certificate_unobtainable";
 826                                         break;
 827                                 case 112:
 828                                         str_details2 = " unrecognized_name";
 829                                         break;
 830                                 case 113:
 831                                         str_details2 = " bad_certificate_status_response";
 832                                         break;
 833                                 case 114:
 834                                         str_details2 = " bad_certificate_hash_value";
 835                                         break;
 836                                 case 115:
 837                                         str_details2 = " unknown_psk_identity";
 838                                         break;
 839                                         }
 840                                 }
 841                         }
 842
 843                 if (content_type == 22) /* Handshake */
 844                         {
 845                         str_details1 = "???";
 846
 847                         if (len > 0)
 848                                 {
 849                                 switch (((const unsigned char*)buf)[0])
 850                                         {
 851                                 case 0:
 852                                         str_details1 = ", HelloRequest";
 853                                         break;
 854                                 case 1:
 855                                         str_details1 = ", ClientHello";
 856                                         break;
 857                                 case 2:
 858                                         str_details1 = ", ServerHello";
 859                                         break;
 860                                 case 3:
 861                                         str_details1 = ", HelloVerifyRequest";
 862                                         break;
 863                                 case 11:
 864                                         str_details1 = ", Certificate";
 865                                         break;
 866                                 case 12:
 867                                         str_details1 = ", ServerKeyExchange";
 868                                         break;
 869                                 case 13:
 870                                         str_details1 = ", CertificateRequest";
 871                                         break;
 872                                 case 14:
 873                                         str_details1 = ", ServerHelloDone";
 874                                         break;
 875                                 case 15:
 876                                         str_details1 = ", CertificateVerify";
 877                                         break;
 878                                 case 16:
 879                                         str_details1 = ", ClientKeyExchange";
 880                                         break;
 881                                 case 20:
 882                                         str_details1 = ", Finished";
 883                                         break;
 884                                 case 23:
 885                                         str_details1 = ", SupplementalData";
 886                                         break;
 887                                         }
 888                                 }
 889                         }
 890
 891 #ifndef OPENSSL_NO_HEARTBEATS
 892                 if (content_type == 24) /* Heartbeat */
 893                         {
 894                         str_details1 = ", Heartbeat";
 895
 896                         if (len > 0)
 897                                 {
 898                                 switch (((const unsigned char*)buf)[0])
 899                                         {
 900                                 case 1:
 901                                         str_details1 = ", HeartbeatRequest";
 902                                         break;
 903                                 case 2:
 904                                         str_details1 = ", HeartbeatResponse";
 905                                         break;
 906                                         }
 907                                 }
 908                         }
 909 #endif
 910                 }
 911
 912         BIO_printf(bio, "%s %s%s [length %04lx]%s%s\n", str_write_p, str_version, str_content_type, (unsigned long)len, str_details1, str_details2);
 913
 914         if (len > 0)
 915                 {
 916                 size_t num, i;
 917
 918                 BIO_printf(bio, "   ");
 919                 num = len;
 920 #if 0
 921                 if (num > 16)
 922                         num = 16;
 923 #endif
 924                 for (i = 0; i < num; i++)
 925                         {
 926                         if (i % 16 == 0 && i > 0)
 927                                 BIO_printf(bio, "\n   ");
 928                         BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
 929                         }
 930                 if (i < len)
 931                         BIO_printf(bio, " ...");
 932                 BIO_printf(bio, "\n");
 933                 }
 934         (void)BIO_flush(bio);
 935         }
 936
 937 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
 938                                         unsigned char *data, int len,
 939                                         void *arg)
 940         {
 941         BIO *bio = arg;
 942         char *extname;
 943
 944         switch(type)
 945                 {
 946                 case TLSEXT_TYPE_server_name:
 947                 extname = "server name";
 948                 break;
 949
 950                 case TLSEXT_TYPE_max_fragment_length:
 951                 extname = "max fragment length";
 952                 break;
 953
 954                 case TLSEXT_TYPE_client_certificate_url:
 955                 extname = "client certificate URL";
 956                 break;
 957
 958                 case TLSEXT_TYPE_trusted_ca_keys:
 959                 extname = "trusted CA keys";
 960                 break;
 961
 962                 case TLSEXT_TYPE_truncated_hmac:
 963                 extname = "truncated HMAC";
 964                 break;
 965
 966                 case TLSEXT_TYPE_status_request:
 967                 extname = "status request";
 968                 break;
 969
 970                 case TLSEXT_TYPE_user_mapping:
 971                 extname = "user mapping";
 972                 break;
 973
 974                 case TLSEXT_TYPE_client_authz:
 975                 extname = "client authz";
 976                 break;
 977
 978                 case TLSEXT_TYPE_server_authz:
 979                 extname = "server authz";
 980                 break;
 981
 982                 case TLSEXT_TYPE_cert_type:
 983                 extname = "cert type";
 984                 break;
 985
 986                 case TLSEXT_TYPE_elliptic_curves:
 987                 extname = "elliptic curves";
 988                 break;
 989
 990                 case TLSEXT_TYPE_ec_point_formats:
 991                 extname = "EC point formats";
 992                 break;
 993
 994                 case TLSEXT_TYPE_srp:
 995                 extname = "SRP";
 996                 break;
 997
 998                 case TLSEXT_TYPE_signature_algorithms:
 999                 extname = "signature algorithms";
1000                 break;
1001
1002                 case TLSEXT_TYPE_use_srtp:
1003                 extname = "use SRTP";
1004                 break;
1005
1006                 case TLSEXT_TYPE_heartbeat:
1007                 extname = "heartbeat";
1008                 break;
1009
1010                 case TLSEXT_TYPE_session_ticket:
1011                 extname = "session ticket";
1012                 break;
1013
1014                 case TLSEXT_TYPE_renegotiate:
1015                 extname = "renegotiation info";
1016                 break;
1017
1018 #ifdef TLSEXT_TYPE_opaque_prf_input
1019                 case TLSEXT_TYPE_opaque_prf_input:
1020                 extname = "opaque PRF input";
1021                 break;
1022 #endif
1023 #ifdef TLSEXT_TYPE_next_proto_neg
1024                 case TLSEXT_TYPE_next_proto_neg:
1025                 extname = "next protocol";
1026                 break;
1027 #endif
1028 #ifdef TLSEXT_TYPE_encrypt_then_mac
1029                 case TLSEXT_TYPE_encrypt_then_mac:
1030                 extname = "encrypt-then-mac";
1031                 break;
1032 #endif
1033
1034                 default:
1035                 extname = "unknown";
1036                 break;
1037
1038                 }
1039
1040         BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
1041                         client_server ? "server": "client",
1042                         extname, type, len);
1043         BIO_dump(bio, (char *)data, len);
1044         (void)BIO_flush(bio);
1045         }
1046
1047 int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
1048         {
1049         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
1050         unsigned int length, resultlength;
1051         union {
1052                 struct sockaddr sa;
1053                 struct sockaddr_in s4;
1054 #if OPENSSL_USE_IPV6
1055                 struct sockaddr_in6 s6;
1056 #endif
1057         } peer;
1058
1059         /* Initialize a random secret */
1060         if (!cookie_initialized)
1061                 {
1062                 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
1063                         {
1064                         BIO_printf(bio_err,"error setting random cookie secret\n");
1065                         return 0;
1066                         }
1067                 cookie_initialized = 1;
1068                 }
1069
1070         /* Read peer information */
1071         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
1072
1073         /* Create buffer with peer's address and port */
1074         length = 0;
1075         switch (peer.sa.sa_family)
1076                 {
1077         case AF_INET:
1078                 length += sizeof(struct in_addr);
1079                 length += sizeof(peer.s4.sin_port);
1080                 break;
1081 #if OPENSSL_USE_IPV6
1082         case AF_INET6:
1083                 length += sizeof(struct in6_addr);
1084                 length += sizeof(peer.s6.sin6_port);
1085                 break;
1086 #endif
1087         default:
1088                 OPENSSL_assert(0);
1089                 break;
1090                 }
1091         buffer = OPENSSL_malloc(length);
1092
1093         if (buffer == NULL)
1094                 {
1095                 BIO_printf(bio_err,"out of memory\n");
1096                 return 0;
1097                 }
1098
1099         switch (peer.sa.sa_family)
1100                 {
1101         case AF_INET:
1102                 memcpy(buffer,
1103                        &peer.s4.sin_port,
1104                        sizeof(peer.s4.sin_port));
1105                 memcpy(buffer + sizeof(peer.s4.sin_port),
1106                        &peer.s4.sin_addr,
1107                        sizeof(struct in_addr));
1108                 break;
1109 #if OPENSSL_USE_IPV6
1110         case AF_INET6:
1111                 memcpy(buffer,
1112                        &peer.s6.sin6_port,
1113                        sizeof(peer.s6.sin6_port));
1114                 memcpy(buffer + sizeof(peer.s6.sin6_port),
1115                        &peer.s6.sin6_addr,
1116                        sizeof(struct in6_addr));
1117                 break;
1118 #endif
1119         default:
1120                 OPENSSL_assert(0);
1121                 break;
1122                 }
1123
1124         /* Calculate HMAC of buffer using the secret */
1125         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1126              buffer, length, result, &resultlength);
1127         OPENSSL_free(buffer);
1128
1129         memcpy(cookie, result, resultlength);
1130         *cookie_len = resultlength;
1131
1132         return 1;
1133         }
1134
1135 int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)
1136         {
1137         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
1138         unsigned int length, resultlength;
1139         union {
1140                 struct sockaddr sa;
1141                 struct sockaddr_in s4;
1142 #if OPENSSL_USE_IPV6
1143                 struct sockaddr_in6 s6;
1144 #endif
1145         } peer;
1146
1147         /* If secret isn't initialized yet, the cookie can't be valid */
1148         if (!cookie_initialized)
1149                 return 0;
1150
1151         /* Read peer information */
1152         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
1153
1154         /* Create buffer with peer's address and port */
1155         length = 0;
1156         switch (peer.sa.sa_family)
1157                 {
1158         case AF_INET:
1159                 length += sizeof(struct in_addr);
1160                 length += sizeof(peer.s4.sin_port);
1161                 break;
1162 #if OPENSSL_USE_IPV6
1163         case AF_INET6:
1164                 length += sizeof(struct in6_addr);
1165                 length += sizeof(peer.s6.sin6_port);
1166                 break;
1167 #endif
1168         default:
1169                 OPENSSL_assert(0);
1170                 break;
1171                 }
1172         buffer = OPENSSL_malloc(length);
1173
1174         if (buffer == NULL)
1175                 {
1176                 BIO_printf(bio_err,"out of memory\n");
1177                 return 0;
1178                 }
1179
1180         switch (peer.sa.sa_family)
1181                 {
1182         case AF_INET:
1183                 memcpy(buffer,
1184                        &peer.s4.sin_port,
1185                        sizeof(peer.s4.sin_port));
1186                 memcpy(buffer + sizeof(peer.s4.sin_port),
1187                        &peer.s4.sin_addr,
1188                        sizeof(struct in_addr));
1189                 break;
1190 #if OPENSSL_USE_IPV6
1191         case AF_INET6:
1192                 memcpy(buffer,
1193                        &peer.s6.sin6_port,
1194                        sizeof(peer.s6.sin6_port));
1195                 memcpy(buffer + sizeof(peer.s6.sin6_port),
1196                        &peer.s6.sin6_addr,
1197                        sizeof(struct in6_addr));
1198                 break;
1199 #endif
1200         default:
1201                 OPENSSL_assert(0);
1202                 break;
1203                 }
1204
1205         /* Calculate HMAC of buffer using the secret */
1206         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1207              buffer, length, result, &resultlength);
1208         OPENSSL_free(buffer);
1209
1210         if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)
1211                 return 1;
1212
1213         return 0;
1214         }
1215
1216 /* Example of extended certificate handling. Where the standard support
1217  * of one certificate per algorithm is not sufficient an application
1218  * can decide which certificate(s) to use at runtime based on whatever
1219  * criteria it deems appropriate.
1220  */
1221
1222 /* Linked list of certificates, keys and chains */
1223 struct  ssl_excert_st
1224         {
1225         int certform;
1226         const char *certfile;
1227         int keyform;
1228         const char *keyfile;
1229         const char *chainfile;
1230         X509 *cert;
1231         EVP_PKEY *key;
1232         STACK_OF(X509) *chain;
1233         int build_chain;
1234         struct ssl_excert_st *next, *prev;
1235         };
1236
1237 struct chain_flags
1238         {
1239         int flag;
1240         const char *name;
1241         };
1242
1243 struct chain_flags chain_flags_list[] =
1244         {
1245                 {CERT_PKEY_VALID, "Overall Validity"},
1246                 {CERT_PKEY_SIGN,  "Sign with EE key"},
1247                 {CERT_PKEY_EE_SIGNATURE, "EE signature"},
1248                 {CERT_PKEY_CA_SIGNATURE, "CA signature"},
1249                 {CERT_PKEY_EE_PARAM, "EE key parameters"},
1250                 {CERT_PKEY_CA_PARAM, "CA key parameters"},
1251                 {CERT_PKEY_EXPLICIT_SIGN,  "Explicity sign with EE key"},
1252                 {CERT_PKEY_ISSUER_NAME,  "Issuer Name"},
1253                 {CERT_PKEY_CERT_TYPE,  "Certificate Type"},
1254                 {0, NULL}
1255         };
1256
1257
1258 static void print_chain_flags(BIO *out, int flags)
1259         {
1260         struct chain_flags *ctmp = chain_flags_list;
1261         while(ctmp->name)
1262                 {
1263                 BIO_printf(out, "\t%s: %s\n", ctmp->name,
1264                                 flags & ctmp->flag ? "OK" : "NOT OK");
1265                 ctmp++;
1266                 }
1267         }
1268
1269 /* Very basic selection callback: just use any certificate chain
1270  * reported as valid. More sophisticated could prioritise according
1271  * to local policy.
1272  */
1273 static int set_cert_cb(SSL *ssl, void *arg)
1274         {
1275         int i, rv;
1276         SSL_EXCERT *exc = arg;
1277 #ifdef CERT_CB_TEST_RETRY
1278         static int retry_cnt;
1279         if (retry_cnt < 5)
1280                 {
1281                 retry_cnt++;
1282                 fprintf(stderr, "Certificate callback retry test: count %d\n",
1283                                                                 retry_cnt);
1284                 return -1;
1285                 }
1286 #endif
1287         SSL_certs_clear(ssl);
1288
1289         if (!exc)
1290                 return 1;
1291
1292         /* Go to end of list and traverse backwards since we prepend
1293          * newer entries this retains the original order.
1294          */
1295         while (exc->next)
1296                 exc = exc->next;
1297
1298         i = 0;
1299
1300         while(exc)
1301                 {
1302                 i++;
1303                 rv = SSL_check_chain(ssl, exc->cert, exc->key, exc->chain);
1304                 BIO_printf(bio_err, "Checking cert chain %d:\nSubject: ", i);
1305                 X509_NAME_print_ex(bio_err, X509_get_subject_name(exc->cert), 0,
1306                                                         XN_FLAG_ONELINE);
1307                 BIO_puts(bio_err, "\n");
1308
1309                 print_chain_flags(bio_err, rv);
1310                 if (rv & CERT_PKEY_VALID)
1311                         {
1312                         SSL_use_certificate(ssl, exc->cert);
1313                         SSL_use_PrivateKey(ssl, exc->key);
1314                         /* NB: we wouldn't normally do this as it is
1315                          * not efficient building chains on each connection
1316                          * better to cache the chain in advance.
1317                          */
1318                         if (exc->build_chain)
1319                                 {
1320                                 if (!SSL_build_cert_chain(ssl, 0))
1321                                         return 0;
1322                                 }
1323                         else if (exc->chain)
1324                                 SSL_set1_chain(ssl, exc->chain);
1325                         }
1326                 exc = exc->prev;
1327                 }
1328         return 1;
1329         }
1330
1331 void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
1332         {
1333         SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
1334         }
1335
1336 static int ssl_excert_prepend(SSL_EXCERT **pexc)
1337         {
1338         SSL_EXCERT *exc;
1339         exc = OPENSSL_malloc(sizeof(SSL_EXCERT));
1340         if (!exc)
1341                 return 0;
1342         exc->certfile = NULL;
1343         exc->keyfile = NULL;
1344         exc->chainfile = NULL;
1345         exc->cert = NULL;
1346         exc->key = NULL;
1347         exc->chain = NULL;
1348         exc->prev = NULL;
1349         exc->build_chain = 0;
1350
1351         exc->next = *pexc;
1352         *pexc = exc;
1353
1354         if (exc->next)
1355                 {
1356                 exc->certform = exc->next->certform;
1357                 exc->keyform = exc->next->keyform;
1358                 exc->next->prev = exc;
1359                 }
1360         else
1361                 {
1362                 exc->certform = FORMAT_PEM;
1363                 exc->keyform = FORMAT_PEM;
1364                 }
1365         return 1;
1366
1367         }
1368
1369 void ssl_excert_free(SSL_EXCERT *exc)
1370         {
1371         SSL_EXCERT *curr;
1372         while (exc)
1373                 {
1374                 if (exc->cert)
1375                         X509_free(exc->cert);
1376                 if (exc->key)
1377                         EVP_PKEY_free(exc->key);
1378                 if (exc->chain)
1379                         sk_X509_pop_free(exc->chain, X509_free);
1380                 curr = exc;
1381                 exc = exc->next;
1382                 OPENSSL_free(curr);
1383                 }
1384         }
1385
1386 int load_excert(SSL_EXCERT **pexc, BIO *err)
1387         {
1388         SSL_EXCERT *exc = *pexc;
1389         if (!exc)
1390                 return 1;
1391         /* If nothing in list, free and set to NULL */
1392         if (!exc->certfile && !exc->next)
1393                 {
1394                 ssl_excert_free(exc);
1395                 *pexc = NULL;
1396                 return 1;
1397                 }
1398         for(; exc; exc=exc->next)
1399                 {
1400                 if (!exc->certfile)
1401                         {
1402                         BIO_printf(err, "Missing filename\n");
1403                         return 0;
1404                         }
1405                 exc->cert = load_cert(err, exc->certfile, exc->certform,
1406                                         NULL, NULL, "Server Certificate");
1407                 if (!exc->cert)
1408                         return 0;
1409                 if (exc->keyfile)
1410                         exc->keyfile = exc->certfile;
1411                 exc->key = load_key(err, exc->certfile, exc->certform, 0,
1412                                         NULL, NULL, "Server Certificate");
1413                 if (!exc->key)
1414                         return 0;
1415                 if (exc->chainfile)
1416                         {
1417                         exc->chain = load_certs(err,
1418                                                 exc->chainfile, FORMAT_PEM,
1419                                                 NULL, NULL,
1420                                                 "Server Chain");
1421                         if (!exc->chainfile)
1422                                 return 0;
1423                         }
1424                 }
1425         return 1;
1426         }
1427
1428
1429 int args_excert(char ***pargs, int *pargc,
1430                         int *badarg, BIO *err, SSL_EXCERT **pexc)
1431         {
1432         char *arg = **pargs, *argn = (*pargs)[1];
1433         SSL_EXCERT *exc = *pexc;
1434         int narg = 2;
1435         if (!exc)
1436                 {
1437                 if (ssl_excert_prepend(&exc))
1438                         *pexc = exc;
1439                 else
1440                         {
1441                         BIO_printf(err, "Error initialising xcert\n");
1442                         *badarg = 1;
1443                         goto err;
1444                         }
1445                 }
1446         if (strcmp(arg, "-xcert") == 0)
1447                 {
1448                 if (!argn)
1449                         {
1450                         *badarg = 1;
1451                         return 1;
1452                         }
1453                 if (exc->certfile && !ssl_excert_prepend(&exc))
1454                         {
1455                         BIO_printf(err, "Error adding xcert\n");
1456                         *badarg = 1;
1457                         goto err;
1458                         }
1459                 exc->certfile = argn;
1460                 }
1461         else if (strcmp(arg,"-xkey") == 0)
1462                 {
1463                 if (!argn)
1464                         {
1465                         *badarg = 1;
1466                         return 1;
1467                         }
1468                 if (exc->keyfile)
1469                         {
1470                         BIO_printf(err, "Key already specified\n");
1471                         *badarg = 1;
1472                         return 1;
1473                         }
1474                 exc->keyfile = argn;
1475                 }
1476         else if (strcmp(arg,"-xchain") == 0)
1477                 {
1478                 if (!argn)
1479                         {
1480                         *badarg = 1;
1481                         return 1;
1482                         }
1483                 if (exc->chainfile)
1484                         {
1485                         BIO_printf(err, "Chain already specified\n");
1486                         *badarg = 1;
1487                         return 1;
1488                         }
1489                 exc->chainfile = argn;
1490                 }
1491         else if (strcmp(arg,"-xchain_build") == 0)
1492                 {
1493                 narg = 1;
1494                 exc->build_chain = 1;
1495                 }
1496         else if (strcmp(arg,"-xcertform") == 0)
1497                 {
1498                 if (!argn)
1499                         {
1500                         *badarg = 1;
1501                         goto err;
1502                         }
1503                 exc->certform = str2fmt(argn);
1504                 }
1505         else if (strcmp(arg,"-xkeyform") == 0)
1506                 {
1507                 if (!argn)
1508                         {
1509                         *badarg = 1;
1510                         goto err;
1511                         }
1512                 exc->keyform = str2fmt(argn);
1513                 }
1514         else
1515                 return 0;
1516
1517         (*pargs) += narg;
1518
1519         if (pargc)
1520                 *pargc -= narg;
1521
1522         *pexc = exc;
1523
1524         return 1;
1525
1526         err:
1527         ERR_print_errors(err);
1528         ssl_excert_free(exc);
1529         *pexc = NULL;
1530         return 1;
1531         }
1532
1533 static void print_raw_cipherlist(BIO *bio, SSL *s)
1534         {
1535         const unsigned char *rlist;
1536         static const unsigned char scsv_id[] = {0, 0, 0xFF};
1537         size_t i, rlistlen, num;
1538         if (!SSL_is_server(s))
1539                 return;
1540         num = SSL_get0_raw_cipherlist(s, NULL);
1541         rlistlen = SSL_get0_raw_cipherlist(s, &rlist);
1542         BIO_puts(bio, "Client cipher list: ");
1543         for (i = 0; i < rlistlen; i += num, rlist += num)
1544                 {
1545                 const SSL_CIPHER *c = SSL_CIPHER_find(s, rlist);
1546                 if (i)
1547                         BIO_puts(bio, ":");
1548                 if (c)
1549                         BIO_puts(bio, SSL_CIPHER_get_name(c));
1550                 else if (!memcmp(rlist, scsv_id - num + 3, num))
1551                         BIO_puts(bio, "SCSV");
1552                 else
1553                         {
1554                         size_t j;
1555                         BIO_puts(bio, "0x");
1556                         for (j = 0; j < num; j++)
1557                                 BIO_printf(bio, "%02X", rlist[j]);
1558                         }
1559                 }
1560         BIO_puts(bio, "\n");
1561         }
1562
1563
1564 void print_ssl_summary(BIO *bio, SSL *s)
1565         {
1566         const SSL_CIPHER *c;
1567         X509 *peer;
1568         /*const char *pnam = SSL_is_server(s) ? "client" : "server";*/
1569         BIO_printf(bio, "Protocol version: %s\n", SSL_get_version(s));
1570         print_raw_cipherlist(bio, s);
1571         c = SSL_get_current_cipher(s);
1572         BIO_printf(bio,"Ciphersuite: %s\n", SSL_CIPHER_get_name(c));
1573         do_print_sigalgs(bio, s, 0);
1574         peer = SSL_get_peer_certificate(s);
1575         if (peer)
1576                 {
1577                 int nid;
1578                 BIO_puts(bio, "Peer certificate: ");
1579                 X509_NAME_print_ex(bio, X509_get_subject_name(peer),
1580                                         0, XN_FLAG_ONELINE);
1581                 BIO_puts(bio, "\n");
1582                 if (SSL_get_peer_signature_nid(s, &nid))
1583                         BIO_printf(bio, "Hash used: %s\n", OBJ_nid2sn(nid));
1584                 }
1585         else
1586                 BIO_puts(bio, "No peer certificate\n");
1587         if (peer)
1588                 X509_free(peer);
1589 #ifndef OPENSSL_NO_EC
1590         ssl_print_point_formats(bio, s);
1591         if (SSL_is_server(s))
1592                 ssl_print_curves(bio, s, 1);
1593         else
1594                 ssl_print_tmp_key(bio, s);
1595 #else
1596         if (!SSL_is_server(s))
1597                 ssl_print_tmp_key(bio, s);
1598 #endif
1599         }
1600
1601 int args_ssl(char ***pargs, int *pargc, SSL_CONF_CTX *cctx,
1602                         int *badarg, BIO *err, STACK_OF(OPENSSL_STRING) **pstr)
1603         {
1604         char *arg = **pargs, *argn = (*pargs)[1];
1605         int rv;
1606
1607         /* Attempt to run SSL configuration command */
1608         rv = SSL_CONF_cmd_argv(cctx, pargc, pargs);
1609         /* If parameter not recognised just return */
1610         if (rv == 0)
1611                 return 0;
1612         /* see if missing argument error */
1613         if (rv == -3)
1614                 {
1615                 BIO_printf(err, "%s needs an argument\n", arg);
1616                 *badarg = 1;
1617                 goto end;
1618                 }
1619         /* Check for some other error */
1620         if (rv < 0)
1621                 {
1622                 BIO_printf(err, "Error with command: \"%s %s\"\n",
1623                                                 arg, argn ? argn : "");
1624                 *badarg = 1;
1625                 goto end;
1626                 }
1627         /* Store command and argument */
1628         /* If only one argument processed store value as NULL */
1629         if (rv == 1)
1630                 argn = NULL;
1631         if (!*pstr)
1632                 *pstr = sk_OPENSSL_STRING_new_null();
1633         if (!*pstr || !sk_OPENSSL_STRING_push(*pstr, arg) ||
1634                                 !sk_OPENSSL_STRING_push(*pstr, argn))
1635                 {
1636                 BIO_puts(err, "Memory allocation failure\n");
1637                 goto end;
1638                 }
1639
1640         end:
1641         if (*badarg)
1642                 ERR_print_errors(err);
1643
1644         return 1;
1645         }
1646
1647 int args_ssl_call(SSL_CTX *ctx, BIO *err, SSL_CONF_CTX *cctx,
1648                 STACK_OF(OPENSSL_STRING) *str, int no_ecdhe, int no_jpake)
1649         {
1650         int i;
1651         SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
1652         for (i = 0; i < sk_OPENSSL_STRING_num(str); i+= 2)
1653                 {
1654                 const char *param = sk_OPENSSL_STRING_value(str, i);
1655                 const char *value = sk_OPENSSL_STRING_value(str, i + 1);
1656                 /* If no_ecdhe or named curve already specified don't need
1657                  * a default.
1658                  */
1659                 if (!no_ecdhe && !strcmp(param, "-named_curve"))
1660                         no_ecdhe = 1;
1661 #ifndef OPENSSL_NO_JPAKE
1662                 if (!no_jpake && !strcmp(param, "-cipher"))
1663                         {
1664                         BIO_puts(err, "JPAKE sets cipher to PSK\n");
1665                         return 0;
1666                         }
1667 #endif
1668                 if (SSL_CONF_cmd(cctx, param, value) <= 0)
1669                         {
1670                         BIO_printf(err, "Error with command: \"%s %s\"\n",
1671                                                 param, value ? value : "");
1672                         ERR_print_errors(err);
1673                         return 0;
1674                         }
1675                 }
1676         /* This is a special case to keep existing s_server functionality:
1677          * if we don't have any curve specified *and* we haven't disabled
1678          * ECDHE then use P-256.
1679          */
1680         if (!no_ecdhe)
1681                 {
1682                 if (SSL_CONF_cmd(cctx, "-named_curve", "P-256") <= 0)
1683                         {
1684                         BIO_puts(err, "Error setting EC curve\n");
1685                         ERR_print_errors(err);
1686                         return 0;
1687                         }
1688                 }
1689 #ifndef OPENSSL_NO_JPAKE
1690         if (!no_jpake)
1691                 {
1692                 if (SSL_CONF_cmd(cctx, "-cipher", "PSK") <= 0)
1693                         {
1694                         BIO_puts(err, "Error setting cipher to PSK\n");
1695                         ERR_print_errors(err);
1696                         return 0;
1697                         }
1698                 }
1699 #endif
1700         if (!SSL_CONF_CTX_finish(cctx))
1701                 {
1702                 BIO_puts(err, "Error finishing context\n");
1703                 ERR_print_errors(err);
1704                 return 0;
1705                 }
1706         return 1;
1707         }
1708
1709 static int add_crls_store(X509_STORE *st, STACK_OF(X509_CRL) *crls)
1710         {
1711         X509_CRL *crl;
1712         int i;
1713         for (i = 0; i < sk_X509_CRL_num(crls); i++)
1714                 {
1715                 crl = sk_X509_CRL_value(crls, i);
1716                 X509_STORE_add_crl(st, crl);
1717                 }
1718         return 1;
1719         }
1720
1721 int ssl_ctx_add_crls(SSL_CTX *ctx, STACK_OF(X509_CRL) *crls, int crl_download)
1722         {
1723         X509_STORE *st;
1724         st = SSL_CTX_get_cert_store(ctx);
1725         add_crls_store(st, crls);
1726         if (crl_download)
1727                 store_setup_crl_download(st);
1728         return 1;
1729         }
1730
1731 int ssl_load_stores(SSL_CTX *ctx,
1732                         const char *vfyCApath, const char *vfyCAfile,
1733                         const char *chCApath, const char *chCAfile,
1734                         STACK_OF(X509_CRL) *crls, int crl_download)
1735         {
1736         X509_STORE *vfy = NULL, *ch = NULL;
1737         int rv = 0;
1738         if (vfyCApath || vfyCAfile)
1739                 {
1740                 vfy = X509_STORE_new();
1741                 if (!X509_STORE_load_locations(vfy, vfyCAfile, vfyCApath))
1742                         goto err;
1743                 add_crls_store(vfy, crls);
1744                 SSL_CTX_set1_verify_cert_store(ctx, vfy);
1745                 if (crl_download)
1746                         store_setup_crl_download(vfy);
1747                 }
1748         if (chCApath || chCAfile)
1749                 {
1750                 ch = X509_STORE_new();
1751                 if (!X509_STORE_load_locations(ch, chCAfile, chCApath))
1752                         goto err;
1753                 SSL_CTX_set1_chain_cert_store(ctx, ch);
1754                 }
1755         rv = 1;
1756         err:
1757         if (vfy)
1758                 X509_STORE_free(vfy);
1759         if (ch)
1760                 X509_STORE_free(ch);
1761         return rv;
1762         }
1763
1764 /* Verbose print out of security callback */
1765
1766 typedef struct
1767         {
1768         BIO *out;
1769         int verbose;
1770         int (*old_cb)(SSL *s, SSL_CTX *ctx, int op, int bits, int nid,
1771                                 void *other, void *ex);
1772         } security_debug_ex;
1773
1774 static int security_callback_debug(SSL *s, SSL_CTX *ctx,
1775                                 int op, int bits, int nid,
1776                                 void *other, void *ex)
1777         {
1778         security_debug_ex *sdb = ex;
1779         int rv, show_bits = 1, cert_md = 0;
1780         const char *nm;
1781         rv = sdb->old_cb(s, ctx, op, bits, nid, other, ex);
1782         if (rv == 1 && sdb->verbose < 2)
1783                 return 1;
1784         BIO_puts(sdb->out, "Security callback: ");
1785
1786         switch (op)
1787                 {
1788         case SSL_SECOP_CIPHER_SUPPORTED:
1789                 nm = "Supported Ciphersuite";
1790                 break;
1791         case SSL_SECOP_CIPHER_SHARED:
1792                 nm = "Shared Ciphersuite";
1793                 break;
1794         case SSL_SECOP_CIPHER_CHECK:
1795                 nm = "Check Ciphersuite";
1796                 break;
1797         case SSL_SECOP_TICKET:
1798                 BIO_puts(sdb->out, "Session ticket");
1799                 show_bits = 0;
1800                 nm = NULL;
1801                 break;
1802         case SSL_SECOP_COMPRESSION:
1803                 BIO_puts(sdb->out, "SSL compression");
1804                 show_bits = 0;
1805                 nm = NULL;
1806                 break;
1807 #ifndef OPENSSL_NO_DH
1808         case SSL_SECOP_TMP_DH:
1809                 nm = "Temp DH key bits";
1810                 break;
1811 #endif
1812         case SSL_SECOP_CURVE_SUPPORTED:
1813                 nm = "Supported Curve";
1814                 break;
1815         case SSL_SECOP_CURVE_SHARED:
1816                 nm = "Shared Curve";
1817                 break;
1818         case SSL_SECOP_CURVE_CHECK:
1819                 nm = "Check Curve";
1820                 break;
1821         case SSL_SECOP_SSL2_COMPAT:
1822                 BIO_puts(sdb->out, "SSLv2 compatible");
1823                 show_bits = 0;
1824                 nm = NULL;
1825                 break;
1826         case SSL_SECOP_VERSION:
1827                 BIO_printf(sdb->out, "Version=%s", ssl_version_str(nid));
1828                 show_bits = 0;
1829                 nm = NULL;
1830                 break;
1831         case SSL_SECOP_SIGALG_SUPPORTED:
1832                 nm = "Supported Signature Algorithm digest";
1833                 break;
1834         case SSL_SECOP_SIGALG_SHARED:
1835                 nm = "Shared Signature Algorithm digest";
1836                 break;
1837         case SSL_SECOP_SIGALG_CHECK:
1838                 nm = "Check Signature Algorithm digest";
1839                 break;
1840         case SSL_SECOP_SIGALG_MASK:
1841                 nm = "Signature Algorithm mask";
1842                 break;
1843         case SSL_SECOP_EE_KEY:
1844                 nm = "Certificate chain EE key";
1845                 break;
1846         case SSL_SECOP_CA_KEY:
1847                 nm = "Certificate chain CA key";
1848                 break;
1849         case SSL_SECOP_CA_MD:
1850                 cert_md = 1;
1851                 nm = "Certificate chain CA digest";
1852                 break;
1853         case SSL_SECOP_PEER_EE_KEY:
1854                 nm = "Peer Chain EE key";
1855                 break;
1856         case SSL_SECOP_PEER_CA_KEY:
1857                 nm = "Peer Chain CA key";
1858                 break;
1859         case SSL_SECOP_PEER_CA_MD:
1860                 cert_md = 1;
1861                 nm = "Peer chain CA digest";
1862                 break;
1863         default:
1864                 nm = NULL;
1865                 }
1866         if (nm)
1867                 BIO_printf(sdb->out, "%s=", nm);
1868
1869         switch (op & SSL_SECOP_OTHER_TYPE)
1870                 {
1871
1872         case SSL_SECOP_OTHER_CIPHER:
1873                 BIO_puts(sdb->out, SSL_CIPHER_get_name(other));
1874                 break;
1875
1876         case SSL_SECOP_OTHER_CURVE:
1877                         {
1878                         const char *cname;
1879                         cname = EC_curve_nid2nist(nid);
1880                         if (cname == NULL)
1881                                 cname = OBJ_nid2sn(nid);
1882                         BIO_puts(sdb->out, cname);
1883                         }
1884                         break;
1885
1886         case SSL_SECOP_OTHER_DH:
1887                         {
1888                         DH *dh = other;
1889                         BIO_printf(sdb->out, "%d", BN_num_bits(dh->p));
1890                         break;
1891                         }
1892         case SSL_SECOP_OTHER_CERT:
1893                         {
1894                         if (cert_md)
1895                                 {
1896                                 int sig_nid = X509_get_signature_nid(other);
1897                                 BIO_puts(sdb->out, OBJ_nid2sn(sig_nid));
1898                                 }
1899                         else
1900                                 {
1901                                 EVP_PKEY *pkey = X509_get_pubkey(other);
1902                                 const char *algname = "";
1903                                 EVP_PKEY_asn1_get0_info(NULL, NULL, NULL, NULL,
1904                                                 &algname,
1905                                                 EVP_PKEY_get0_asn1(pkey));
1906                                 BIO_printf(sdb->out, "%s, bits=%d",
1907                                                 algname, EVP_PKEY_bits(pkey));
1908                                 EVP_PKEY_free(pkey);
1909                                 }
1910                         break;
1911                         }
1912         case SSL_SECOP_OTHER_SIGALG:
1913                         {
1914                         const unsigned char *salg = other;
1915                         const char *sname = NULL;
1916                         switch (salg[1])
1917                                 {
1918                         case TLSEXT_signature_anonymous:
1919                                 sname = "anonymous";
1920                                 break;
1921                         case TLSEXT_signature_rsa:
1922                                 sname = "RSA";
1923                                 break;
1924                         case TLSEXT_signature_dsa:
1925                                 sname = "DSA";
1926                                 break;
1927                         case TLSEXT_signature_ecdsa:
1928                                 sname = "ECDSA";
1929                                 break;
1930                                 }
1931
1932                         BIO_puts(sdb->out, OBJ_nid2sn(nid));
1933                         if (sname)
1934                                 BIO_printf(sdb->out, ", algorithm=%s", sname);
1935                         else
1936                                 BIO_printf(sdb->out, ", algid=%d", salg[1]);
1937                         break;
1938                         }
1939
1940                 }
1941
1942         if (show_bits)
1943                 BIO_printf(sdb->out, ", security bits=%d", bits);
1944         BIO_printf(sdb->out, ": %s\n", rv ? "yes" : "no");
1945         return rv;
1946         }
1947
1948 void ssl_ctx_security_debug(SSL_CTX *ctx, BIO *out, int verbose)
1949         {
1950         static security_debug_ex sdb;
1951         sdb.out = out;
1952         sdb.verbose = verbose;
1953         sdb.old_cb = SSL_CTX_get_security_callback(ctx);
1954         SSL_CTX_set_security_callback(ctx, security_callback_debug);
1955         SSL_CTX_set0_security_ex_data(ctx, &sdb);
1956         }
1957
1958
1959