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 "s_apps.h"
 124
 125 #define COOKIE_SECRET_LENGTH    16
 126
 127 int verify_depth=0;
 128 int verify_quiet=0;
 129 int verify_error=X509_V_OK;
 130 int verify_return_error=0;
 131 unsigned char cookie_secret[COOKIE_SECRET_LENGTH];
 132 int cookie_initialized=0;
 133
 134 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
 135         {
 136         X509 *err_cert;
 137         int err,depth;
 138
 139         err_cert=X509_STORE_CTX_get_current_cert(ctx);
 140         err=    X509_STORE_CTX_get_error(ctx);
 141         depth=  X509_STORE_CTX_get_error_depth(ctx);
 142
 143         if (!verify_quiet || !ok)
 144                 {
 145                 BIO_printf(bio_err,"depth=%d ",depth);
 146                 if (err_cert)
 147                         {
 148                         X509_NAME_print_ex(bio_err,
 149                                         X509_get_subject_name(err_cert),
 150                                         0, XN_FLAG_ONELINE);
 151                         BIO_puts(bio_err, "\n");
 152                         }
 153                 else
 154                         BIO_puts(bio_err, "<no cert>\n");
 155                 }
 156         if (!ok)
 157                 {
 158                 BIO_printf(bio_err,"verify error:num=%d:%s\n",err,
 159                         X509_verify_cert_error_string(err));
 160                 if (verify_depth >= depth)
 161                         {
 162                         if (!verify_return_error)
 163                                 ok=1;
 164                         verify_error=X509_V_OK;
 165                         }
 166                 else
 167                         {
 168                         ok=0;
 169                         verify_error=X509_V_ERR_CERT_CHAIN_TOO_LONG;
 170                         }
 171                 }
 172         switch (err)
 173                 {
 174         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 175                 BIO_puts(bio_err,"issuer= ");
 176                 X509_NAME_print_ex(bio_err, X509_get_issuer_name(err_cert),
 177                                         0, XN_FLAG_ONELINE);
 178                 BIO_puts(bio_err, "\n");
 179                 break;
 180         case X509_V_ERR_CERT_NOT_YET_VALID:
 181         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 182                 BIO_printf(bio_err,"notBefore=");
 183                 ASN1_TIME_print(bio_err,X509_get_notBefore(err_cert));
 184                 BIO_printf(bio_err,"\n");
 185                 break;
 186         case X509_V_ERR_CERT_HAS_EXPIRED:
 187         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 188                 BIO_printf(bio_err,"notAfter=");
 189                 ASN1_TIME_print(bio_err,X509_get_notAfter(err_cert));
 190                 BIO_printf(bio_err,"\n");
 191                 break;
 192         case X509_V_ERR_NO_EXPLICIT_POLICY:
 193                 policies_print(bio_err, ctx);
 194                 break;
 195                 }
 196         if (err == X509_V_OK && ok == 2 && !verify_quiet)
 197                 policies_print(bio_err, ctx);
 198         if (ok && !verify_quiet)
 199                 BIO_printf(bio_err,"verify return:%d\n",ok);
 200         return(ok);
 201         }
 202
 203 int set_cert_stuff(SSL_CTX *ctx, char *cert_file, char *key_file)
 204         {
 205         if (cert_file != NULL)
 206                 {
 207                 /*
 208                 SSL *ssl;
 209                 X509 *x509;
 210                 */
 211
 212                 if (SSL_CTX_use_certificate_file(ctx,cert_file,
 213                         SSL_FILETYPE_PEM) <= 0)
 214                         {
 215                         BIO_printf(bio_err,"unable to get certificate from '%s'\n",cert_file);
 216                         ERR_print_errors(bio_err);
 217                         return(0);
 218                         }
 219                 if (key_file == NULL) key_file=cert_file;
 220                 if (SSL_CTX_use_PrivateKey_file(ctx,key_file,
 221                         SSL_FILETYPE_PEM) <= 0)
 222                         {
 223                         BIO_printf(bio_err,"unable to get private key from '%s'\n",key_file);
 224                         ERR_print_errors(bio_err);
 225                         return(0);
 226                         }
 227
 228                 /*
 229                 In theory this is no longer needed
 230                 ssl=SSL_new(ctx);
 231                 x509=SSL_get_certificate(ssl);
 232
 233                 if (x509 != NULL) {
 234                         EVP_PKEY *pktmp;
 235                         pktmp = X509_get_pubkey(x509);
 236                         EVP_PKEY_copy_parameters(pktmp,
 237                                                 SSL_get_privatekey(ssl));
 238                         EVP_PKEY_free(pktmp);
 239                 }
 240                 SSL_free(ssl);
 241                 */
 242
 243                 /* If we are using DSA, we can copy the parameters from
 244                  * the private key */
 245
 246
 247                 /* Now we know that a key and cert have been set against
 248                  * the SSL context */
 249                 if (!SSL_CTX_check_private_key(ctx))
 250                         {
 251                         BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 252                         return(0);
 253                         }
 254                 }
 255         return(1);
 256         }
 257
 258 int set_cert_key_stuff(SSL_CTX *ctx, X509 *cert, EVP_PKEY *key,
 259                        STACK_OF(X509) *chain, int build_chain)
 260         {
 261         if (cert == NULL)
 262                 return 1;
 263         if (SSL_CTX_use_certificate(ctx,cert) <= 0)
 264                 {
 265                 BIO_printf(bio_err,"error setting certificate\n");
 266                 ERR_print_errors(bio_err);
 267                 return 0;
 268                 }
 269
 270         if (SSL_CTX_use_PrivateKey(ctx,key) <= 0)
 271                 {
 272                 BIO_printf(bio_err,"error setting private key\n");
 273                 ERR_print_errors(bio_err);
 274                 return 0;
 275                 }
 276
 277         /* Now we know that a key and cert have been set against
 278          * the SSL context */
 279         if (!SSL_CTX_check_private_key(ctx))
 280                 {
 281                 BIO_printf(bio_err,"Private key does not match the certificate public key\n");
 282                 return 0;
 283                 }
 284         if (chain && !SSL_CTX_set1_chain(ctx, chain))
 285                 {
 286                 BIO_printf(bio_err,"error setting certificate chain\n");
 287                 ERR_print_errors(bio_err);
 288                 return 0;
 289                 }
 290         if (!chain && build_chain && !SSL_CTX_build_cert_chain(ctx, 0))
 291                 {
 292                 BIO_printf(bio_err,"error building certificate chain\n");
 293                 ERR_print_errors(bio_err);
 294                 return 0;
 295                 }
 296         return 1;
 297         }
 298
 299 static void ssl_print_client_cert_types(BIO *bio, SSL *s)
 300         {
 301         const unsigned char *p;
 302         int i;
 303         int cert_type_num = SSL_get0_certificate_types(s, &p);
 304         if (!cert_type_num)
 305                 return;
 306         BIO_puts(bio, "Client Certificate Types: ");
 307         for (i = 0; i < cert_type_num; i++)
 308                 {
 309                 unsigned char cert_type = p[i];
 310                 char *cname;
 311                 switch(cert_type)
 312                         {
 313                 case TLS_CT_RSA_SIGN:
 314                         cname = "RSA sign";
 315                         break;
 316
 317                 case TLS_CT_DSS_SIGN:
 318                         cname = "DSA sign";
 319                         break;
 320
 321                 case TLS_CT_RSA_FIXED_DH:
 322                         cname = "RSA fixed DH";
 323                         break;
 324
 325                 case TLS_CT_DSS_FIXED_DH:
 326                         cname = "DSS fixed DH";
 327                         break;
 328
 329                 case TLS_CT_ECDSA_SIGN:
 330                         cname = "ECDSA sign";
 331                         break;
 332
 333                 case TLS_CT_RSA_FIXED_ECDH:
 334                         cname = "RSA fixed ECDH";
 335                         break;
 336
 337                 case TLS_CT_ECDSA_FIXED_ECDH:
 338                         cname = "ECDSA fixed ECDH";
 339                         break;
 340
 341                 case TLS_CT_GOST94_SIGN:
 342                         cname = "GOST94 Sign";
 343                         break;
 344
 345                 case TLS_CT_GOST01_SIGN:
 346                         cname = "GOST01 Sign";
 347                         break;
 348
 349                 default:
 350                          cname = NULL;
 351                         }
 352
 353                 if (i)
 354                         BIO_puts(bio, ", ");
 355
 356                 if (cname)
 357                         BIO_puts(bio, cname);
 358                 else
 359                         BIO_printf(bio, "UNKNOWN (%d),", cert_type);
 360                 }
 361         BIO_puts(bio, "\n");
 362         }
 363
 364 static int do_print_sigalgs(BIO *out, SSL *s, int shared)
 365         {
 366         int i, nsig, client;
 367         client = SSL_is_server(s) ? 0 : 1;
 368         if (shared)
 369                 nsig = SSL_get_shared_sigalgs(s, -1, NULL, NULL, NULL,
 370                                                         NULL, NULL);
 371         else
 372                 nsig = SSL_get_sigalgs(s, -1, NULL, NULL, NULL, NULL, NULL);
 373         if (nsig == 0)
 374                 return 1;
 375
 376         if (shared)
 377                 BIO_puts(out, "Shared ");
 378
 379         if (client)
 380                 BIO_puts(out, "Requested ");
 381         BIO_puts(out, "Signature Algorithms: ");
 382         for (i = 0; i < nsig; i++)
 383                 {
 384                 int hash_nid, sign_nid;
 385                 unsigned char rhash, rsign;
 386                 const char *sstr = NULL;
 387                 if (shared)
 388                         SSL_get_shared_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 389                                                         &rsign, &rhash);
 390                 else
 391                         SSL_get_sigalgs(s, i, &sign_nid, &hash_nid, NULL,
 392                                                         &rsign, &rhash);
 393                 if (i)
 394                         BIO_puts(out, ":");
 395                 if (sign_nid == EVP_PKEY_RSA)
 396                         sstr = "RSA";
 397                 else if(sign_nid == EVP_PKEY_DSA)
 398                         sstr = "DSA";
 399                 else if(sign_nid == EVP_PKEY_EC)
 400                         sstr = "ECDSA";
 401                 if (sstr)
 402                         BIO_printf(out,"%s+", sstr);
 403                 else
 404                         BIO_printf(out,"0x%02X+", (int)rsign);
 405                 if (hash_nid != NID_undef)
 406                         BIO_printf(out, "%s", OBJ_nid2sn(hash_nid));
 407                 else
 408                         BIO_printf(out,"0x%02X", (int)rhash);
 409                 }
 410         BIO_puts(out, "\n");
 411         return 1;
 412         }
 413
 414 int ssl_print_sigalgs(BIO *out, SSL *s)
 415         {
 416         int mdnid;
 417         if (!SSL_is_server(s))
 418                 ssl_print_client_cert_types(out, s);
 419         do_print_sigalgs(out, s, 0);
 420         do_print_sigalgs(out, s, 1);
 421         if (SSL_get_peer_signature_nid(s, &mdnid))
 422                 BIO_printf(out, "Peer signing digest: %s\n", OBJ_nid2sn(mdnid));
 423         return 1;
 424         }
 425
 426 int ssl_print_point_formats(BIO *out, SSL *s)
 427         {
 428         int i, nformats;
 429         const char *pformats;
 430         nformats = SSL_get0_ec_point_formats(s, &pformats);
 431         if (nformats <= 0)
 432                 return 1;
 433         BIO_puts(out, "Supported Elliptic Curve Point Formats: ");
 434         for (i = 0; i < nformats; i++, pformats++)
 435                 {
 436                 if (i)
 437                         BIO_puts(out, ":");
 438                 switch(*pformats)
 439                         {
 440                 case TLSEXT_ECPOINTFORMAT_uncompressed:
 441                         BIO_puts(out, "uncompressed");
 442                         break;
 443
 444                 case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime:
 445                         BIO_puts(out, "ansiX962_compressed_prime");
 446                         break;
 447
 448                 case TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2:
 449                         BIO_puts(out, "ansiX962_compressed_char2");
 450                         break;
 451
 452                 default:
 453                         BIO_printf(out, "unknown(%d)", (int)*pformats);
 454                         break;
 455
 456                         }
 457                 }
 458         if (nformats <= 0)
 459                 BIO_puts(out, "NONE");
 460         BIO_puts(out, "\n");
 461         return 1;
 462         }
 463
 464 int ssl_print_curves(BIO *out, SSL *s, int noshared)
 465         {
 466         int i, ncurves, *curves, nid;
 467         const char *cname;
 468         ncurves = SSL_get1_curves(s, NULL);
 469         if (ncurves <= 0)
 470                 return 1;
 471         curves = OPENSSL_malloc(ncurves * sizeof(int));
 472         SSL_get1_curves(s, curves);
 473
 474         BIO_puts(out, "Supported Elliptic Curves: ");
 475         for (i = 0; i < ncurves; i++)
 476                 {
 477                 if (i)
 478                         BIO_puts(out, ":");
 479                 nid = curves[i];
 480                 /* If unrecognised print out hex version */
 481                 if (nid & TLSEXT_nid_unknown)
 482                         BIO_printf(out, "0x%04X", nid & 0xFFFF);
 483                 else
 484                         {
 485                         /* Use NIST name for curve if it exists */
 486                         cname = EC_curve_nid2nist(nid);
 487                         if (!cname)
 488                                 cname = OBJ_nid2sn(nid);
 489                         BIO_printf(out, "%s", cname);
 490                         }
 491                 }
 492         if (ncurves == 0)
 493                 BIO_puts(out, "NONE");
 494         OPENSSL_free(curves);
 495         if (noshared)
 496                 {
 497                 BIO_puts(out, "\n");
 498                 return 1;
 499                 }
 500         BIO_puts(out, "\nShared Elliptic curves: ");
 501         ncurves = SSL_get_shared_curve(s, -1);
 502         for (i = 0; i < ncurves; i++)
 503                 {
 504                 if (i)
 505                         BIO_puts(out, ":");
 506                 nid = SSL_get_shared_curve(s, i);
 507                 cname = EC_curve_nid2nist(nid);
 508                 if (!cname)
 509                         cname = OBJ_nid2sn(nid);
 510                 BIO_printf(out, "%s", cname);
 511                 }
 512         if (ncurves == 0)
 513                 BIO_puts(out, "NONE");
 514         BIO_puts(out, "\n");
 515         return 1;
 516         }
 517
 518 int ssl_print_tmp_key(BIO *out, SSL *s)
 519         {
 520         EVP_PKEY *key;
 521         if (!SSL_get_server_tmp_key(s, &key))
 522                 return 1;
 523         BIO_puts(out, "Server Temp Key: ");
 524         switch (EVP_PKEY_id(key))
 525                 {
 526         case EVP_PKEY_RSA:
 527                 BIO_printf(out, "RSA, %d bits\n", EVP_PKEY_bits(key));
 528                 break;
 529
 530         case EVP_PKEY_DH:
 531                 BIO_printf(out, "DH, %d bits\n", EVP_PKEY_bits(key));
 532                 break;
 533
 534         case EVP_PKEY_EC:
 535                         {
 536                         EC_KEY *ec = EVP_PKEY_get1_EC_KEY(key);
 537                         int nid;
 538                         const char *cname;
 539                         nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec));
 540                         EC_KEY_free(ec);
 541                         cname = EC_curve_nid2nist(nid);
 542                         if (!cname)
 543                                 cname = OBJ_nid2sn(nid);
 544                         BIO_printf(out, "ECDH, %s, %d bits\n",
 545                                                 cname, EVP_PKEY_bits(key));
 546                         }
 547                 }
 548         EVP_PKEY_free(key);
 549         return 1;
 550         }
 551
 552
 553 long MS_CALLBACK bio_dump_callback(BIO *bio, int cmd, const char *argp,
 554                                    int argi, long argl, long ret)
 555         {
 556         BIO *out;
 557
 558         out=(BIO *)BIO_get_callback_arg(bio);
 559         if (out == NULL) return(ret);
 560
 561         if (cmd == (BIO_CB_READ|BIO_CB_RETURN))
 562                 {
 563                 BIO_printf(out,"read from %p [%p] (%lu bytes => %ld (0x%lX))\n",
 564                         (void *)bio,argp,(unsigned long)argi,ret,ret);
 565                 BIO_dump(out,argp,(int)ret);
 566                 return(ret);
 567                 }
 568         else if (cmd == (BIO_CB_WRITE|BIO_CB_RETURN))
 569                 {
 570                 BIO_printf(out,"write to %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                 }
 574         return(ret);
 575         }
 576
 577 void MS_CALLBACK apps_ssl_info_callback(const SSL *s, int where, int ret)
 578         {
 579         const char *str;
 580         int w;
 581
 582         w=where& ~SSL_ST_MASK;
 583
 584         if (w & SSL_ST_CONNECT) str="SSL_connect";
 585         else if (w & SSL_ST_ACCEPT) str="SSL_accept";
 586         else str="undefined";
 587
 588         if (where & SSL_CB_LOOP)
 589                 {
 590                 BIO_printf(bio_err,"%s:%s\n",str,SSL_state_string_long(s));
 591                 }
 592         else if (where & SSL_CB_ALERT)
 593                 {
 594                 str=(where & SSL_CB_READ)?"read":"write";
 595                 BIO_printf(bio_err,"SSL3 alert %s:%s:%s\n",
 596                         str,
 597                         SSL_alert_type_string_long(ret),
 598                         SSL_alert_desc_string_long(ret));
 599                 }
 600         else if (where & SSL_CB_EXIT)
 601                 {
 602                 if (ret == 0)
 603                         BIO_printf(bio_err,"%s:failed in %s\n",
 604                                 str,SSL_state_string_long(s));
 605                 else if (ret < 0)
 606                         {
 607                         BIO_printf(bio_err,"%s:error in %s\n",
 608                                 str,SSL_state_string_long(s));
 609                         }
 610                 }
 611         }
 612
 613
 614 void MS_CALLBACK msg_cb(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)
 615         {
 616         BIO *bio = arg;
 617         const char *str_write_p, *str_version, *str_content_type = "", *str_details1 = "", *str_details2= "";
 618
 619         str_write_p = write_p ? ">>>" : "<<<";
 620
 621         switch (version)
 622                 {
 623         case SSL2_VERSION:
 624                 str_version = "SSL 2.0";
 625                 break;
 626         case SSL3_VERSION:
 627                 str_version = "SSL 3.0 ";
 628                 break;
 629         case TLS1_VERSION:
 630                 str_version = "TLS 1.0 ";
 631                 break;
 632         case TLS1_1_VERSION:
 633                 str_version = "TLS 1.1 ";
 634                 break;
 635         case TLS1_2_VERSION:
 636                 str_version = "TLS 1.2 ";
 637                 break;
 638         case DTLS1_VERSION:
 639                 str_version = "DTLS 1.0 ";
 640                 break;
 641         case DTLS1_BAD_VER:
 642                 str_version = "DTLS 1.0 (bad) ";
 643                 break;
 644         default:
 645                 str_version = "???";
 646                 }
 647
 648         if (version == SSL2_VERSION)
 649                 {
 650                 str_details1 = "???";
 651
 652                 if (len > 0)
 653                         {
 654                         switch (((const unsigned char*)buf)[0])
 655                                 {
 656                                 case 0:
 657                                         str_details1 = ", ERROR:";
 658                                         str_details2 = " ???";
 659                                         if (len >= 3)
 660                                                 {
 661                                                 unsigned err = (((const unsigned char*)buf)[1]<<8) + ((const unsigned char*)buf)[2];
 662
 663                                                 switch (err)
 664                                                         {
 665                                                 case 0x0001:
 666                                                         str_details2 = " NO-CIPHER-ERROR";
 667                                                         break;
 668                                                 case 0x0002:
 669                                                         str_details2 = " NO-CERTIFICATE-ERROR";
 670                                                         break;
 671                                                 case 0x0004:
 672                                                         str_details2 = " BAD-CERTIFICATE-ERROR";
 673                                                         break;
 674                                                 case 0x0006:
 675                                                         str_details2 = " UNSUPPORTED-CERTIFICATE-TYPE-ERROR";
 676                                                         break;
 677                                                         }
 678                                                 }
 679
 680                                         break;
 681                                 case 1:
 682                                         str_details1 = ", CLIENT-HELLO";
 683                                         break;
 684                                 case 2:
 685                                         str_details1 = ", CLIENT-MASTER-KEY";
 686                                         break;
 687                                 case 3:
 688                                         str_details1 = ", CLIENT-FINISHED";
 689                                         break;
 690                                 case 4:
 691                                         str_details1 = ", SERVER-HELLO";
 692                                         break;
 693                                 case 5:
 694                                         str_details1 = ", SERVER-VERIFY";
 695                                         break;
 696                                 case 6:
 697                                         str_details1 = ", SERVER-FINISHED";
 698                                         break;
 699                                 case 7:
 700                                         str_details1 = ", REQUEST-CERTIFICATE";
 701                                         break;
 702                                 case 8:
 703                                         str_details1 = ", CLIENT-CERTIFICATE";
 704                                         break;
 705                                 }
 706                         }
 707                 }
 708
 709         if (version == SSL3_VERSION ||
 710             version == TLS1_VERSION ||
 711             version == TLS1_1_VERSION ||
 712             version == TLS1_2_VERSION ||
 713             version == DTLS1_VERSION ||
 714             version == DTLS1_BAD_VER)
 715                 {
 716                 switch (content_type)
 717                         {
 718                 case 20:
 719                         str_content_type = "ChangeCipherSpec";
 720                         break;
 721                 case 21:
 722                         str_content_type = "Alert";
 723                         break;
 724                 case 22:
 725                         str_content_type = "Handshake";
 726                         break;
 727                         }
 728
 729                 if (content_type == 21) /* Alert */
 730                         {
 731                         str_details1 = ", ???";
 732
 733                         if (len == 2)
 734                                 {
 735                                 switch (((const unsigned char*)buf)[0])
 736                                         {
 737                                 case 1:
 738                                         str_details1 = ", warning";
 739                                         break;
 740                                 case 2:
 741                                         str_details1 = ", fatal";
 742                                         break;
 743                                         }
 744
 745                                 str_details2 = " ???";
 746                                 switch (((const unsigned char*)buf)[1])
 747                                         {
 748                                 case 0:
 749                                         str_details2 = " close_notify";
 750                                         break;
 751                                 case 10:
 752                                         str_details2 = " unexpected_message";
 753                                         break;
 754                                 case 20:
 755                                         str_details2 = " bad_record_mac";
 756                                         break;
 757                                 case 21:
 758                                         str_details2 = " decryption_failed";
 759                                         break;
 760                                 case 22:
 761                                         str_details2 = " record_overflow";
 762                                         break;
 763                                 case 30:
 764                                         str_details2 = " decompression_failure";
 765                                         break;
 766                                 case 40:
 767                                         str_details2 = " handshake_failure";
 768                                         break;
 769                                 case 42:
 770                                         str_details2 = " bad_certificate";
 771                                         break;
 772                                 case 43:
 773                                         str_details2 = " unsupported_certificate";
 774                                         break;
 775                                 case 44:
 776                                         str_details2 = " certificate_revoked";
 777                                         break;
 778                                 case 45:
 779                                         str_details2 = " certificate_expired";
 780                                         break;
 781                                 case 46:
 782                                         str_details2 = " certificate_unknown";
 783                                         break;
 784                                 case 47:
 785                                         str_details2 = " illegal_parameter";
 786                                         break;
 787                                 case 48:
 788                                         str_details2 = " unknown_ca";
 789                                         break;
 790                                 case 49:
 791                                         str_details2 = " access_denied";
 792                                         break;
 793                                 case 50:
 794                                         str_details2 = " decode_error";
 795                                         break;
 796                                 case 51:
 797                                         str_details2 = " decrypt_error";
 798                                         break;
 799                                 case 60:
 800                                         str_details2 = " export_restriction";
 801                                         break;
 802                                 case 70:
 803                                         str_details2 = " protocol_version";
 804                                         break;
 805                                 case 71:
 806                                         str_details2 = " insufficient_security";
 807                                         break;
 808                                 case 80:
 809                                         str_details2 = " internal_error";
 810                                         break;
 811                                 case 90:
 812                                         str_details2 = " user_canceled";
 813                                         break;
 814                                 case 100:
 815                                         str_details2 = " no_renegotiation";
 816                                         break;
 817                                 case 110:
 818                                         str_details2 = " unsupported_extension";
 819                                         break;
 820                                 case 111:
 821                                         str_details2 = " certificate_unobtainable";
 822                                         break;
 823                                 case 112:
 824                                         str_details2 = " unrecognized_name";
 825                                         break;
 826                                 case 113:
 827                                         str_details2 = " bad_certificate_status_response";
 828                                         break;
 829                                 case 114:
 830                                         str_details2 = " bad_certificate_hash_value";
 831                                         break;
 832                                 case 115:
 833                                         str_details2 = " unknown_psk_identity";
 834                                         break;
 835                                         }
 836                                 }
 837                         }
 838
 839                 if (content_type == 22) /* Handshake */
 840                         {
 841                         str_details1 = "???";
 842
 843                         if (len > 0)
 844                                 {
 845                                 switch (((const unsigned char*)buf)[0])
 846                                         {
 847                                 case 0:
 848                                         str_details1 = ", HelloRequest";
 849                                         break;
 850                                 case 1:
 851                                         str_details1 = ", ClientHello";
 852                                         break;
 853                                 case 2:
 854                                         str_details1 = ", ServerHello";
 855                                         break;
 856                                 case 3:
 857                                         str_details1 = ", HelloVerifyRequest";
 858                                         break;
 859                                 case 11:
 860                                         str_details1 = ", Certificate";
 861                                         break;
 862                                 case 12:
 863                                         str_details1 = ", ServerKeyExchange";
 864                                         break;
 865                                 case 13:
 866                                         str_details1 = ", CertificateRequest";
 867                                         break;
 868                                 case 14:
 869                                         str_details1 = ", ServerHelloDone";
 870                                         break;
 871                                 case 15:
 872                                         str_details1 = ", CertificateVerify";
 873                                         break;
 874                                 case 16:
 875                                         str_details1 = ", ClientKeyExchange";
 876                                         break;
 877                                 case 20:
 878                                         str_details1 = ", Finished";
 879                                         break;
 880                                         }
 881                                 }
 882                         }
 883
 884 #ifndef OPENSSL_NO_HEARTBEATS
 885                 if (content_type == 24) /* Heartbeat */
 886                         {
 887                         str_details1 = ", Heartbeat";
 888
 889                         if (len > 0)
 890                                 {
 891                                 switch (((const unsigned char*)buf)[0])
 892                                         {
 893                                 case 1:
 894                                         str_details1 = ", HeartbeatRequest";
 895                                         break;
 896                                 case 2:
 897                                         str_details1 = ", HeartbeatResponse";
 898                                         break;
 899                                         }
 900                                 }
 901                         }
 902 #endif
 903                 }
 904
 905         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);
 906
 907         if (len > 0)
 908                 {
 909                 size_t num, i;
 910
 911                 BIO_printf(bio, "   ");
 912                 num = len;
 913 #if 0
 914                 if (num > 16)
 915                         num = 16;
 916 #endif
 917                 for (i = 0; i < num; i++)
 918                         {
 919                         if (i % 16 == 0 && i > 0)
 920                                 BIO_printf(bio, "\n   ");
 921                         BIO_printf(bio, " %02x", ((const unsigned char*)buf)[i]);
 922                         }
 923                 if (i < len)
 924                         BIO_printf(bio, " ...");
 925                 BIO_printf(bio, "\n");
 926                 }
 927         (void)BIO_flush(bio);
 928         }
 929
 930 void MS_CALLBACK tlsext_cb(SSL *s, int client_server, int type,
 931                                         unsigned char *data, int len,
 932                                         void *arg)
 933         {
 934         BIO *bio = arg;
 935         char *extname;
 936
 937         switch(type)
 938                 {
 939                 case TLSEXT_TYPE_server_name:
 940                 extname = "server name";
 941                 break;
 942
 943                 case TLSEXT_TYPE_max_fragment_length:
 944                 extname = "max fragment length";
 945                 break;
 946
 947                 case TLSEXT_TYPE_client_certificate_url:
 948                 extname = "client certificate URL";
 949                 break;
 950
 951                 case TLSEXT_TYPE_trusted_ca_keys:
 952                 extname = "trusted CA keys";
 953                 break;
 954
 955                 case TLSEXT_TYPE_truncated_hmac:
 956                 extname = "truncated HMAC";
 957                 break;
 958
 959                 case TLSEXT_TYPE_status_request:
 960                 extname = "status request";
 961                 break;
 962
 963                 case TLSEXT_TYPE_user_mapping:
 964                 extname = "user mapping";
 965                 break;
 966
 967                 case TLSEXT_TYPE_client_authz:
 968                 extname = "client authz";
 969                 break;
 970
 971                 case TLSEXT_TYPE_server_authz:
 972                 extname = "server authz";
 973                 break;
 974
 975                 case TLSEXT_TYPE_cert_type:
 976                 extname = "cert type";
 977                 break;
 978
 979                 case TLSEXT_TYPE_elliptic_curves:
 980                 extname = "elliptic curves";
 981                 break;
 982
 983                 case TLSEXT_TYPE_ec_point_formats:
 984                 extname = "EC point formats";
 985                 break;
 986
 987                 case TLSEXT_TYPE_srp:
 988                 extname = "SRP";
 989                 break;
 990
 991                 case TLSEXT_TYPE_signature_algorithms:
 992                 extname = "signature algorithms";
 993                 break;
 994
 995                 case TLSEXT_TYPE_use_srtp:
 996                 extname = "use SRTP";
 997                 break;
 998
 999                 case TLSEXT_TYPE_heartbeat:
1000                 extname = "heartbeat";
1001                 break;
1002
1003                 case TLSEXT_TYPE_session_ticket:
1004                 extname = "session ticket";
1005                 break;
1006
1007                 case TLSEXT_TYPE_renegotiate:
1008                 extname = "renegotiation info";
1009                 break;
1010
1011 #ifdef TLSEXT_TYPE_opaque_prf_input
1012                 case TLSEXT_TYPE_opaque_prf_input:
1013                 extname = "opaque PRF input";
1014                 break;
1015 #endif
1016 #ifdef TLSEXT_TYPE_next_proto_neg
1017                 case TLSEXT_TYPE_next_proto_neg:
1018                 extname = "next protocol";
1019                 break;
1020 #endif
1021
1022                 default:
1023                 extname = "unknown";
1024                 break;
1025
1026                 }
1027
1028         BIO_printf(bio, "TLS %s extension \"%s\" (id=%d), len=%d\n",
1029                         client_server ? "server": "client",
1030                         extname, type, len);
1031         BIO_dump(bio, (char *)data, len);
1032         (void)BIO_flush(bio);
1033         }
1034
1035 int MS_CALLBACK generate_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int *cookie_len)
1036         {
1037         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
1038         unsigned int length, resultlength;
1039         union {
1040                 struct sockaddr sa;
1041                 struct sockaddr_in s4;
1042 #if OPENSSL_USE_IPV6
1043                 struct sockaddr_in6 s6;
1044 #endif
1045         } peer;
1046
1047         /* Initialize a random secret */
1048         if (!cookie_initialized)
1049                 {
1050                 if (!RAND_bytes(cookie_secret, COOKIE_SECRET_LENGTH))
1051                         {
1052                         BIO_printf(bio_err,"error setting random cookie secret\n");
1053                         return 0;
1054                         }
1055                 cookie_initialized = 1;
1056                 }
1057
1058         /* Read peer information */
1059         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
1060
1061         /* Create buffer with peer's address and port */
1062         length = 0;
1063         switch (peer.sa.sa_family)
1064                 {
1065         case AF_INET:
1066                 length += sizeof(struct in_addr);
1067                 length += sizeof(peer.s4.sin_port);
1068                 break;
1069 #if OPENSSL_USE_IPV6
1070         case AF_INET6:
1071                 length += sizeof(struct in6_addr);
1072                 length += sizeof(peer.s6.sin6_port);
1073                 break;
1074 #endif
1075         default:
1076                 OPENSSL_assert(0);
1077                 break;
1078                 }
1079         buffer = OPENSSL_malloc(length);
1080
1081         if (buffer == NULL)
1082                 {
1083                 BIO_printf(bio_err,"out of memory\n");
1084                 return 0;
1085                 }
1086
1087         switch (peer.sa.sa_family)
1088                 {
1089         case AF_INET:
1090                 memcpy(buffer,
1091                        &peer.s4.sin_port,
1092                        sizeof(peer.s4.sin_port));
1093                 memcpy(buffer + sizeof(peer.s4.sin_port),
1094                        &peer.s4.sin_addr,
1095                        sizeof(struct in_addr));
1096                 break;
1097 #if OPENSSL_USE_IPV6
1098         case AF_INET6:
1099                 memcpy(buffer,
1100                        &peer.s6.sin6_port,
1101                        sizeof(peer.s6.sin6_port));
1102                 memcpy(buffer + sizeof(peer.s6.sin6_port),
1103                        &peer.s6.sin6_addr,
1104                        sizeof(struct in6_addr));
1105                 break;
1106 #endif
1107         default:
1108                 OPENSSL_assert(0);
1109                 break;
1110                 }
1111
1112         /* Calculate HMAC of buffer using the secret */
1113         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1114              buffer, length, result, &resultlength);
1115         OPENSSL_free(buffer);
1116
1117         memcpy(cookie, result, resultlength);
1118         *cookie_len = resultlength;
1119
1120         return 1;
1121         }
1122
1123 int MS_CALLBACK verify_cookie_callback(SSL *ssl, unsigned char *cookie, unsigned int cookie_len)
1124         {
1125         unsigned char *buffer, result[EVP_MAX_MD_SIZE];
1126         unsigned int length, resultlength;
1127         union {
1128                 struct sockaddr sa;
1129                 struct sockaddr_in s4;
1130 #if OPENSSL_USE_IPV6
1131                 struct sockaddr_in6 s6;
1132 #endif
1133         } peer;
1134
1135         /* If secret isn't initialized yet, the cookie can't be valid */
1136         if (!cookie_initialized)
1137                 return 0;
1138
1139         /* Read peer information */
1140         (void)BIO_dgram_get_peer(SSL_get_rbio(ssl), &peer);
1141
1142         /* Create buffer with peer's address and port */
1143         length = 0;
1144         switch (peer.sa.sa_family)
1145                 {
1146         case AF_INET:
1147                 length += sizeof(struct in_addr);
1148                 length += sizeof(peer.s4.sin_port);
1149                 break;
1150 #if OPENSSL_USE_IPV6
1151         case AF_INET6:
1152                 length += sizeof(struct in6_addr);
1153                 length += sizeof(peer.s6.sin6_port);
1154                 break;
1155 #endif
1156         default:
1157                 OPENSSL_assert(0);
1158                 break;
1159                 }
1160         buffer = OPENSSL_malloc(length);
1161
1162         if (buffer == NULL)
1163                 {
1164                 BIO_printf(bio_err,"out of memory\n");
1165                 return 0;
1166                 }
1167
1168         switch (peer.sa.sa_family)
1169                 {
1170         case AF_INET:
1171                 memcpy(buffer,
1172                        &peer.s4.sin_port,
1173                        sizeof(peer.s4.sin_port));
1174                 memcpy(buffer + sizeof(peer.s4.sin_port),
1175                        &peer.s4.sin_addr,
1176                        sizeof(struct in_addr));
1177                 break;
1178 #if OPENSSL_USE_IPV6
1179         case AF_INET6:
1180                 memcpy(buffer,
1181                        &peer.s6.sin6_port,
1182                        sizeof(peer.s6.sin6_port));
1183                 memcpy(buffer + sizeof(peer.s6.sin6_port),
1184                        &peer.s6.sin6_addr,
1185                        sizeof(struct in6_addr));
1186                 break;
1187 #endif
1188         default:
1189                 OPENSSL_assert(0);
1190                 break;
1191                 }
1192
1193         /* Calculate HMAC of buffer using the secret */
1194         HMAC(EVP_sha1(), cookie_secret, COOKIE_SECRET_LENGTH,
1195              buffer, length, result, &resultlength);
1196         OPENSSL_free(buffer);
1197
1198         if (cookie_len == resultlength && memcmp(result, cookie, resultlength) == 0)
1199                 return 1;
1200
1201         return 0;
1202         }
1203
1204 /* Example of extended certificate handling. Where the standard support
1205  * of one certificate per algorithm is not sufficient an application
1206  * can decide which certificate(s) to use at runtime based on whatever
1207  * criteria it deems appropriate.
1208  */
1209
1210 /* Linked list of certificates, keys and chains */
1211 struct  ssl_excert_st
1212         {
1213         int certform;
1214         const char *certfile;
1215         int keyform;
1216         const char *keyfile;
1217         const char *chainfile;
1218         X509 *cert;
1219         EVP_PKEY *key;
1220         STACK_OF(X509) *chain;
1221         int build_chain;
1222         struct ssl_excert_st *next, *prev;
1223         };
1224
1225 struct chain_flags
1226         {
1227         int flag;
1228         const char *name;
1229         };
1230
1231 struct chain_flags chain_flags_list[] =
1232         {
1233                 {CERT_PKEY_VALID, "Overall Validity"},
1234                 {CERT_PKEY_SIGN,  "Sign with EE key"},
1235                 {CERT_PKEY_EE_SIGNATURE, "EE signature"},
1236                 {CERT_PKEY_CA_SIGNATURE, "CA signature"},
1237                 {CERT_PKEY_EE_PARAM, "EE key parameters"},
1238                 {CERT_PKEY_CA_PARAM, "CA key parameters"},
1239                 {CERT_PKEY_EXPLICIT_SIGN,  "Explicity sign with EE key"},
1240                 {CERT_PKEY_ISSUER_NAME,  "Issuer Name"},
1241                 {CERT_PKEY_CERT_TYPE,  "Certificate Type"},
1242                 {0, NULL}
1243         };
1244
1245
1246 static void print_chain_flags(BIO *out, int flags)
1247         {
1248         struct chain_flags *ctmp = chain_flags_list;
1249         while(ctmp->name)
1250                 {
1251                 BIO_printf(out, "\t%s: %s\n", ctmp->name,
1252                                 flags & ctmp->flag ? "OK" : "NOT OK");
1253                 ctmp++;
1254                 }
1255         }
1256
1257 /* Very basic selection callback: just use any certificate chain
1258  * reported as valid. More sophisticated could prioritise according
1259  * to local policy.
1260  */
1261 static int set_cert_cb(SSL *ssl, void *arg)
1262         {
1263         int i, rv;
1264         SSL_EXCERT *exc = arg;
1265         SSL_certs_clear(ssl);
1266
1267         if (!exc)
1268                 return 1;
1269
1270         /* Go to end of list and traverse backwards since we prepend
1271          * newer entries this retains the original order.
1272          */
1273         while (exc->next)
1274                 exc = exc->next;
1275
1276         i = 0;
1277
1278         while(exc)
1279                 {
1280                 i++;
1281                 rv = SSL_check_chain(ssl, exc->cert, exc->key, exc->chain);
1282                 BIO_printf(bio_err, "Checking cert chain %d:\nSubject: ", i);
1283                 X509_NAME_print_ex(bio_err, X509_get_subject_name(exc->cert), 0,
1284                                                         XN_FLAG_ONELINE);
1285                 BIO_puts(bio_err, "\n");
1286
1287                 print_chain_flags(bio_err, rv);
1288                 if (rv & CERT_PKEY_VALID)
1289                         {
1290                         SSL_use_certificate(ssl, exc->cert);
1291                         SSL_use_PrivateKey(ssl, exc->key);
1292                         /* NB: we wouldn't normally do this as it is
1293                          * not efficient building chains on each connection
1294                          * better to cache the chain in advance.
1295                          */
1296                         if (exc->build_chain)
1297                                 {
1298                                 if (!SSL_build_cert_chain(ssl, 0))
1299                                         return 0;
1300                                 }
1301                         else if (exc->chain)
1302                                 SSL_set1_chain(ssl, exc->chain);
1303                         }
1304                 exc = exc->prev;
1305                 }
1306         return 1;
1307         }
1308
1309 void ssl_ctx_set_excert(SSL_CTX *ctx, SSL_EXCERT *exc)
1310         {
1311         SSL_CTX_set_cert_cb(ctx, set_cert_cb, exc);
1312         }
1313
1314 static int ssl_excert_prepend(SSL_EXCERT **pexc)
1315         {
1316         SSL_EXCERT *exc;
1317         exc = OPENSSL_malloc(sizeof(SSL_EXCERT));
1318         if (!exc)
1319                 return 0;
1320         exc->certfile = NULL;
1321         exc->keyfile = NULL;
1322         exc->chainfile = NULL;
1323         exc->cert = NULL;
1324         exc->key = NULL;
1325         exc->chain = NULL;
1326         exc->prev = NULL;
1327         exc->build_chain = 0;
1328
1329         exc->next = *pexc;
1330         *pexc = exc;
1331
1332         if (exc->next)
1333                 {
1334                 exc->certform = exc->next->certform;
1335                 exc->keyform = exc->next->keyform;
1336                 exc->next->prev = exc;
1337                 }
1338         else
1339                 {
1340                 exc->certform = FORMAT_PEM;
1341                 exc->keyform = FORMAT_PEM;
1342                 }
1343         return 1;
1344
1345         }
1346
1347 void ssl_excert_free(SSL_EXCERT *exc)
1348         {
1349         SSL_EXCERT *curr;
1350         while (exc)
1351                 {
1352                 if (exc->cert)
1353                         X509_free(exc->cert);
1354                 if (exc->key)
1355                         EVP_PKEY_free(exc->key);
1356                 if (exc->chain)
1357                         sk_X509_pop_free(exc->chain, X509_free);
1358                 curr = exc;
1359                 exc = exc->next;
1360                 OPENSSL_free(curr);
1361                 }
1362         }
1363
1364 int load_excert(SSL_EXCERT **pexc, BIO *err)
1365         {
1366         SSL_EXCERT *exc = *pexc;
1367         if (!exc)
1368                 return 1;
1369         /* If nothing in list, free and set to NULL */
1370         if (!exc->certfile && !exc->next)
1371                 {
1372                 ssl_excert_free(exc);
1373                 *pexc = NULL;
1374                 return 1;
1375                 }
1376         for(; exc; exc=exc->next)
1377                 {
1378                 if (!exc->certfile)
1379                         {
1380                         BIO_printf(err, "Missing filename\n");
1381                         return 0;
1382                         }
1383                 exc->cert = load_cert(err, exc->certfile, exc->certform,
1384                                         NULL, NULL, "Server Certificate");
1385                 if (!exc->cert)
1386                         return 0;
1387                 if (exc->keyfile)
1388                         exc->keyfile = exc->certfile;
1389                 exc->key = load_key(err, exc->certfile, exc->certform, 0,
1390                                         NULL, NULL, "Server Certificate");
1391                 if (!exc->key)
1392                         return 0;
1393                 if (exc->chainfile)
1394                         {
1395                         exc->chain = load_certs(err,
1396                                                 exc->chainfile, FORMAT_PEM,
1397                                                 NULL, NULL,
1398                                                 "Server Chain");
1399                         if (!exc->chainfile)
1400                                 return 0;
1401                         }
1402                 }
1403         return 1;
1404         }
1405
1406
1407 int args_excert(char ***pargs, int *pargc,
1408                         int *badarg, BIO *err, SSL_EXCERT **pexc)
1409         {
1410         char *arg = **pargs, *argn = (*pargs)[1];
1411         SSL_EXCERT *exc = *pexc;
1412         int narg = 2;
1413         if (!exc)
1414                 {
1415                 if (ssl_excert_prepend(&exc))
1416                         *pexc = exc;
1417                 else
1418                         {
1419                         BIO_printf(err, "Error initialising xcert\n");
1420                         *badarg = 1;
1421                         goto err;
1422                         }
1423                 }
1424         if (strcmp(arg, "-xcert") == 0)
1425                 {
1426                 if (!argn)
1427                         {
1428                         *badarg = 1;
1429                         return 1;
1430                         }
1431                 if (exc->certfile && !ssl_excert_prepend(&exc))
1432                         {
1433                         BIO_printf(err, "Error adding xcert\n");
1434                         *badarg = 1;
1435                         goto err;
1436                         }
1437                 exc->certfile = argn;
1438                 }
1439         else if (strcmp(arg,"-xkey") == 0)
1440                 {
1441                 if (!argn)
1442                         {
1443                         *badarg = 1;
1444                         return 1;
1445                         }
1446                 if (exc->keyfile)
1447                         {
1448                         BIO_printf(err, "Key already specified\n");
1449                         *badarg = 1;
1450                         return 1;
1451                         }
1452                 exc->keyfile = argn;
1453                 }
1454         else if (strcmp(arg,"-xchain") == 0)
1455                 {
1456                 if (!argn)
1457                         {
1458                         *badarg = 1;
1459                         return 1;
1460                         }
1461                 if (exc->chainfile)
1462                         {
1463                         BIO_printf(err, "Chain already specified\n");
1464                         *badarg = 1;
1465                         return 1;
1466                         }
1467                 exc->chainfile = argn;
1468                 }
1469         else if (strcmp(arg,"-xchain_build") == 0)
1470                 {
1471                 narg = 1;
1472                 exc->build_chain = 1;
1473                 }
1474         else if (strcmp(arg,"-xcertform") == 0)
1475                 {
1476                 if (!argn)
1477                         {
1478                         *badarg = 1;
1479                         goto err;
1480                         }
1481                 exc->certform = str2fmt(argn);
1482                 }
1483         else if (strcmp(arg,"-xkeyform") == 0)
1484                 {
1485                 if (!argn)
1486                         {
1487                         *badarg = 1;
1488                         goto err;
1489                         }
1490                 exc->keyform = str2fmt(argn);
1491                 }
1492         else
1493                 return 0;
1494
1495         (*pargs) += narg;
1496
1497         if (pargc)
1498                 *pargc -= narg;
1499
1500         *pexc = exc;
1501
1502         return 1;
1503
1504         err:
1505         ERR_print_errors(err);
1506         ssl_excert_free(exc);
1507         *pexc = NULL;
1508         return 1;
1509         }
1510
1511 static void print_raw_cipherlist(BIO *bio, SSL *s)
1512         {
1513         const unsigned char *rlist;
1514         static const unsigned char scsv_id[] = {0, 0, 0xFF};
1515         size_t i, rlistlen, num;
1516         if (!SSL_is_server(s))
1517                 return;
1518         num = SSL_get0_raw_cipherlist(s, NULL);
1519         rlistlen = SSL_get0_raw_cipherlist(s, &rlist);
1520         BIO_puts(bio, "Client cipher list: ");
1521         for (i = 0; i < rlistlen; i += num, rlist += num)
1522                 {
1523                 const SSL_CIPHER *c = SSL_CIPHER_find(s, rlist);
1524                 if (i)
1525                         BIO_puts(bio, ":");
1526                 if (c)
1527                         BIO_puts(bio, SSL_CIPHER_get_name(c));
1528                 else if (!memcmp(rlist, scsv_id - num + 3, num))
1529                         BIO_puts(bio, "SCSV");
1530                 else
1531                         {
1532                         size_t j;
1533                         BIO_puts(bio, "0x");
1534                         for (j = 0; j < num; j++)
1535                                 BIO_printf(bio, "%02X", rlist[j]);
1536                         }
1537                 }
1538         BIO_puts(bio, "\n");
1539         }
1540
1541
1542 void print_ssl_summary(BIO *bio, SSL *s)
1543         {
1544         const SSL_CIPHER *c;
1545         X509 *peer;
1546         /*const char *pnam = SSL_is_server(s) ? "client" : "server";*/
1547         BIO_printf(bio, "Protocol version: %s\n", SSL_get_version(s));
1548         print_raw_cipherlist(bio, s);
1549         c = SSL_get_current_cipher(s);
1550         BIO_printf(bio,"Ciphersuite: %s\n", SSL_CIPHER_get_name(c));
1551         do_print_sigalgs(bio, s, 0);
1552         peer = SSL_get_peer_certificate(s);
1553         if (peer)
1554                 {
1555                 int nid;
1556                 BIO_puts(bio, "Peer certificate: ");
1557                 X509_NAME_print_ex(bio, X509_get_subject_name(peer),
1558                                         0, XN_FLAG_ONELINE);
1559                 BIO_puts(bio, "\n");
1560                 if (SSL_get_peer_signature_nid(s, &nid))
1561                         BIO_printf(bio, "Hash used: %s\n", OBJ_nid2sn(nid));
1562                 }
1563         else
1564                 BIO_puts(bio, "No peer certificate\n");
1565         if (peer)
1566                 X509_free(peer);
1567         ssl_print_point_formats(bio, s);
1568         if (SSL_is_server(s))
1569                 ssl_print_curves(bio, s, 1);
1570         else
1571                 ssl_print_tmp_key(bio, s);
1572         }
1573
1574 void print_ssl_cert_checks(BIO *bio, SSL *s,
1575                                 const unsigned char *checkhost,
1576                                 const unsigned char *checkemail,
1577                                 const char *checkip)
1578         {
1579         X509 *peer;
1580         peer = SSL_get_peer_certificate(s);
1581         if (peer)
1582                 {
1583                 print_cert_checks(bio, peer, checkhost, checkemail, checkip);
1584                 X509_free(peer);
1585                 }
1586         }
1587
1588 int args_ssl(char ***pargs, int *pargc, SSL_CONF_CTX *cctx,
1589                         int *badarg, BIO *err, STACK_OF(OPENSSL_STRING) **pstr)
1590         {
1591         char *arg = **pargs, *argn = (*pargs)[1];
1592         int rv;
1593
1594         /* Attempt to run SSL configuration command */
1595         rv = SSL_CONF_cmd_argv(cctx, pargc, pargs);
1596         /* If parameter not recognised just return */
1597         if (rv == 0)
1598                 return 0;
1599         /* see if missing argument error */
1600         if (rv == -3)
1601                 {
1602                 BIO_printf(err, "%s needs an argument\n", arg);
1603                 *badarg = 1;
1604                 goto end;
1605                 }
1606         /* Check for some other error */
1607         if (rv < 0)
1608                 {
1609                 BIO_printf(err, "Error with command: \"%s %s\"\n",
1610                                                 arg, argn ? argn : "");
1611                 *badarg = 1;
1612                 goto end;
1613                 }
1614         /* Store command and argument */
1615         /* If only one argument processed store value as NULL */
1616         if (rv == 1)
1617                 argn = NULL;
1618         if (!*pstr)
1619                 *pstr = sk_OPENSSL_STRING_new_null();
1620         if (!*pstr || !sk_OPENSSL_STRING_push(*pstr, arg) ||
1621                                 !sk_OPENSSL_STRING_push(*pstr, argn))
1622                 {
1623                 BIO_puts(err, "Memory allocation failure\n");
1624                 goto end;
1625                 }
1626
1627         end:
1628         if (*badarg)
1629                 ERR_print_errors(err);
1630
1631         return 1;
1632         }
1633
1634 int args_ssl_call(SSL_CTX *ctx, BIO *err, SSL_CONF_CTX *cctx,
1635                                 STACK_OF(OPENSSL_STRING) *str, int no_ecdhe)
1636         {
1637         int i;
1638         SSL_CONF_CTX_set_ssl_ctx(cctx, ctx);
1639         for (i = 0; i < sk_OPENSSL_STRING_num(str); i+= 2)
1640                 {
1641                 const char *param = sk_OPENSSL_STRING_value(str, i);
1642                 const char *value = sk_OPENSSL_STRING_value(str, i + 1);
1643                 /* If no_ecdhe or named curve already specified don't need
1644                  * a default.
1645                  */
1646                 if (!no_ecdhe && !strcmp(param, "-named_curve"))
1647                         no_ecdhe = 1;
1648                 if (SSL_CONF_cmd(cctx, param, value) <= 0)
1649                         {
1650                         BIO_printf(err, "Error with command: \"%s %s\"\n",
1651                                                 param, value ? value : "");
1652                         ERR_print_errors(err);
1653                         return 0;
1654                         }
1655                 }
1656         /* This is a special case to keep existing s_server functionality:
1657          * if we don't have any curve specified *and* we haven't disabled
1658          * ECDHE then use P-256.
1659          */
1660         if (!no_ecdhe)
1661                 {
1662                 if (SSL_CONF_cmd(cctx, "-named_curve", "P-256") <= 0)
1663                         {
1664                         BIO_puts(err, "Error setting EC curve\n");
1665                         ERR_print_errors(err);
1666                         return 0;
1667                         }
1668                 }
1669         return 1;
1670         }
1671
1672 static int add_crls_store(X509_STORE *st, STACK_OF(X509_CRL) *crls)
1673         {
1674         X509_CRL *crl;
1675         int i;
1676         if (crls)
1677                 {
1678                 for (i = 0; i < sk_X509_CRL_num(crls); i++)
1679                         {
1680                         crl = sk_X509_CRL_value(crls, i);
1681                         X509_STORE_add_crl(st, crl);
1682                         }
1683                 }
1684         return 1;
1685         }
1686
1687 int ssl_ctx_add_crls(SSL_CTX *ctx, STACK_OF(X509_CRL) *crls)
1688         {
1689         X509_STORE *st;
1690         if (crls)
1691                 {
1692                 st = SSL_CTX_get_cert_store(ctx);
1693                 add_crls_store(st, crls);
1694                 }
1695         return 1;
1696         }
1697
1698 int ssl_load_stores(SSL_CTX *ctx,
1699                         const char *vfyCApath, const char *vfyCAfile,
1700                         const char *chCApath, const char *chCAfile,
1701                         STACK_OF(X509_CRL) *crls)
1702         {
1703         X509_STORE *vfy = NULL, *ch = NULL;
1704         int rv = 0;
1705         if (vfyCApath || vfyCAfile)
1706                 {
1707                 vfy = X509_STORE_new();
1708                 if (!X509_STORE_load_locations(vfy, vfyCAfile, vfyCApath))
1709                         goto err;
1710                 add_crls_store(vfy, crls);
1711                 SSL_CTX_set1_verify_cert_store(ctx, vfy);
1712                 }
1713         if (chCApath || chCAfile)
1714                 {
1715                 ch = X509_STORE_new();
1716                 if (!X509_STORE_load_locations(ch, chCAfile, chCApath))
1717                         goto err;
1718                 SSL_CTX_set1_chain_cert_store(ctx, ch);
1719                 }
1720         rv = 1;
1721         err:
1722         if (vfy)
1723                 X509_STORE_free(vfy);
1724         if (ch)
1725                 X509_STORE_free(ch);
1726         return rv;
1727         }