ssl/ssl_conf.c

   1 /*! \file ssl/ssl_conf.c
   2  *  \brief SSL configuration functions
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 2012 The OpenSSL Project.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  *
  19  * 3. All advertising materials mentioning features or use of this
  20  *    software must display the following acknowledgment:
  21  *    "This product includes software developed by the OpenSSL Project
  22  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  23  *
  24  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  25  *    endorse or promote products derived from this software without
  26  *    prior written permission. For written permission, please contact
  27  *    openssl-core@openssl.org.
  28  *
  29  * 5. Products derived from this software may not be called "OpenSSL"
  30  *    nor may "OpenSSL" appear in their names without prior written
  31  *    permission of the OpenSSL Project.
  32  *
  33  * 6. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by the OpenSSL Project
  36  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  37  *
  38  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  39  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  40  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  41  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  44  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  45  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  47  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  48  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  49  * OF THE POSSIBILITY OF SUCH DAMAGE.
  50  * ====================================================================
  51  *
  52  * This product includes cryptographic software written by Eric Young
  53  * (eay@cryptsoft.com).  This product includes software written by Tim
  54  * Hudson (tjh@cryptsoft.com).
  55  *
  56  */
  57
  58 #ifdef REF_CHECK
  59 #  include <assert.h>
  60 #endif
  61 #include <stdio.h>
  62 #include "ssl_locl.h"
  63 #include <openssl/conf.h>
  64 #include <openssl/objects.h>
  65
  66 /* structure holding name tables. This is used for pemitted elements in
  67  * lists such as TLSv1 and single command line switches such as no_tls1
  68  */
  69
  70 typedef struct
  71         {
  72         const char *name;
  73         int namelen;
  74         unsigned int name_flags;
  75         unsigned long option_value;
  76         } ssl_flag_tbl;
  77
  78 /* Sense of name is inverted e.g. "TLSv1" will clear SSL_OP_NO_TLSv1 */
  79 #define SSL_TFLAG_INV   0x1
  80 /* Flags refers to cert_flags not options */
  81 #define SSL_TFLAG_CERT  0x2
  82 /* Option can only be used for clients */
  83 #define SSL_TFLAG_CLIENT SSL_CONF_FLAG_CLIENT
  84 /* Option can only be used for servers */
  85 #define SSL_TFLAG_SERVER SSL_CONF_FLAG_SERVER
  86 #define SSL_TFLAG_BOTH (SSL_TFLAG_CLIENT|SSL_TFLAG_SERVER)
  87
  88 #define SSL_FLAG_TBL(str, flag) \
  89         {str, (int)(sizeof(str) - 1), SSL_TFLAG_BOTH, flag}
  90 #define SSL_FLAG_TBL_SRV(str, flag) \
  91         {str, (int)(sizeof(str) - 1), SSL_TFLAG_SERVER, flag}
  92 #define SSL_FLAG_TBL_CLI(str, flag) \
  93         {str, (int)(sizeof(str) - 1), SSL_TFLAG_CLIENT, flag}
  94 #define SSL_FLAG_TBL_INV(str, flag) \
  95         {str, (int)(sizeof(str) - 1), SSL_TFLAG_INV|SSL_TFLAG_BOTH, flag}
  96 #define SSL_FLAG_TBL_SRV_INV(str, flag) \
  97         {str, (int)(sizeof(str) - 1), SSL_TFLAG_INV|SSL_TFLAG_SERVER, flag}
  98 #define SSL_FLAG_TBL_CERT(str, flag) \
  99         {str, (int)(sizeof(str) - 1), SSL_TFLAG_CERT|SSL_TFLAG_BOTH, flag}
 100
 101 /* Opaque structure containing SSL configuration context.
 102  */
 103
 104 struct ssl_conf_ctx_st
 105         {
 106         /* Various flags indicating (among other things) which options we
 107          * will recognise.
 108          */
 109         unsigned int flags;
 110         /* Prefix and length of commands */
 111         char *prefix;
 112         size_t prefixlen;
 113         /* SSL_CTX or SSL structure to perform operations on */
 114         SSL_CTX *ctx;
 115         SSL *ssl;
 116         /* Pointer to SSL or SSL_CTX options field or NULL if none */
 117         unsigned long *poptions;
 118         /* Pointer to SSL or SSL_CTX cert_flags or NULL if none */
 119         unsigned int *pcert_flags;
 120         /* Current flag table being worked on */
 121         const ssl_flag_tbl *tbl;
 122         /* Size of table */
 123         size_t ntbl;
 124         };
 125
 126 static int ssl_match_option(SSL_CONF_CTX *cctx, const ssl_flag_tbl *tbl,
 127                                 const char *name, int namelen, int onoff)
 128         {
 129         /* If name not relevant for context skip */
 130         if (!(cctx->flags & tbl->name_flags & SSL_TFLAG_BOTH))
 131                 return 0;
 132         if (namelen == -1)
 133                 {
 134                 if (strcmp(tbl->name, name))
 135                         return 0;
 136                 }
 137         else if (tbl->namelen != namelen || strncasecmp(tbl->name, name, namelen))
 138                 return 0;
 139         if (cctx->poptions)
 140                 {
 141                 if (tbl->name_flags & SSL_TFLAG_INV)
 142                         onoff ^= 1;
 143                 if (tbl->name_flags & SSL_TFLAG_CERT)
 144                         {
 145                         if (onoff)
 146                                 *cctx->pcert_flags |= tbl->option_value;
 147                         else
 148                                 *cctx->pcert_flags &= ~tbl->option_value;
 149                         }
 150                 else
 151                         {
 152                         if (onoff)
 153                                 *cctx->poptions |= tbl->option_value;
 154                         else
 155                                 *cctx->poptions &= ~tbl->option_value;
 156                         }
 157                 }
 158         return 1;
 159         }
 160
 161 static int ssl_set_option_list(const char *elem, int len, void *usr)
 162         {
 163         SSL_CONF_CTX *cctx = usr;
 164         size_t i;
 165         const ssl_flag_tbl *tbl;
 166         int onoff = 1;
 167         /* len == -1 indicates not being called in list context, just for
 168          * single command line switches, so don't allow +, -.
 169          */
 170         if (len != -1)
 171                 {
 172                 if (*elem == '+')
 173                         {
 174                         elem++;
 175                         len--;
 176                         onoff = 1;
 177                         }
 178                 else if (*elem == '-')
 179                         {
 180                         elem++;
 181                         len--;
 182                         onoff = 0;
 183                         }
 184                 }
 185         for (i = 0, tbl = cctx->tbl; i < cctx->ntbl; i++, tbl++)
 186                 {
 187                 if (ssl_match_option(cctx, tbl, elem, len, onoff))
 188                         return 1;
 189                 }
 190         return 0;
 191         }
 192
 193 /* Single command line switches with no argument e.g. -no_ssl3 */
 194 static int ctrl_str_option(SSL_CONF_CTX *cctx, const char *cmd)
 195         {
 196         static const ssl_flag_tbl ssl_option_single[] =
 197                 {
 198                 SSL_FLAG_TBL("no_ssl2", SSL_OP_NO_SSLv2),
 199                 SSL_FLAG_TBL("no_ssl3", SSL_OP_NO_SSLv3),
 200                 SSL_FLAG_TBL("no_tls1", SSL_OP_NO_TLSv1),
 201                 SSL_FLAG_TBL("no_tls1_1", SSL_OP_NO_TLSv1_1),
 202                 SSL_FLAG_TBL("no_tls1_2", SSL_OP_NO_TLSv1_2),
 203                 SSL_FLAG_TBL("no_tls1_2", SSL_OP_NO_TLSv1_2),
 204                 SSL_FLAG_TBL("bugs", SSL_OP_ALL),
 205                 SSL_FLAG_TBL("no_comp", SSL_OP_NO_COMPRESSION),
 206 #ifndef OPENSSL_NO_TLSEXT
 207                 SSL_FLAG_TBL("no_ticket", SSL_OP_NO_TICKET),
 208 #endif
 209                 SSL_FLAG_TBL_SRV("serverpref", SSL_OP_CIPHER_SERVER_PREFERENCE),
 210                 SSL_FLAG_TBL("legacy_renegotiation", SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION),
 211                 SSL_FLAG_TBL_SRV("legacy_server_connect", SSL_OP_LEGACY_SERVER_CONNECT),
 212                 SSL_FLAG_TBL_SRV_INV("no_legacy_server_connect", SSL_OP_LEGACY_SERVER_CONNECT),
 213                 SSL_FLAG_TBL_CERT("strict", SSL_CERT_FLAG_TLS_STRICT),
 214 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
 215                 SSL_FLAG_TBL_CERT("debug_broken_protocol", SSL_CERT_FLAG_BROKEN_PROTOCOL),
 216 #endif
 217                 };
 218         cctx->tbl = ssl_option_single;
 219         cctx->ntbl = sizeof(ssl_option_single)/sizeof(ssl_flag_tbl);
 220         return ssl_set_option_list(cmd, -1, cctx);
 221         }
 222
 223 /* Set supported signature algorithms */
 224 static int cmd_sigalgs(SSL_CONF_CTX *cctx, const char *value)
 225         {
 226         int rv;
 227         if (cctx->ssl)
 228                 rv = SSL_set1_sigalgs_list(cctx->ssl, value);
 229         /* NB: ctx == NULL performs syntax checking only */
 230         else
 231                 rv = SSL_CTX_set1_sigalgs_list(cctx->ctx, value);
 232         return rv > 0;
 233         }
 234 /* Set supported client signature algorithms */
 235 static int cmd_client_sigalgs(SSL_CONF_CTX *cctx, const char *value)
 236         {
 237         int rv;
 238         if (cctx->ssl)
 239                 rv = SSL_set1_client_sigalgs_list(cctx->ssl, value);
 240         /* NB: ctx == NULL performs syntax checking only */
 241         else
 242                 rv = SSL_CTX_set1_client_sigalgs_list(cctx->ctx, value);
 243         return rv > 0;
 244         }
 245
 246 static int cmd_curves(SSL_CONF_CTX *cctx, const char *value)
 247         {
 248         int rv;
 249         if (!(cctx->flags & SSL_CONF_FLAG_CLIENT))
 250                 return -2;
 251         if (cctx->ssl)
 252                 rv = SSL_set1_curves_list(cctx->ssl, value);
 253         /* NB: ctx == NULL performs syntax checking only */
 254         else
 255                 rv = SSL_CTX_set1_curves_list(cctx->ctx, value);
 256         return rv > 0;
 257         }
 258
 259 /* ECDH temporary parameters */
 260 static int cmd_ecdhparam(SSL_CONF_CTX *cctx, const char *value)
 261         {
 262         int onoff = -1, rv = 1;
 263         if (!(cctx->flags & SSL_CONF_FLAG_SERVER))
 264                 return -2;
 265         if (cctx->flags & SSL_CONF_FLAG_FILE)
 266                 {
 267                 if (*value == '+')
 268                         {
 269                         onoff = 1;
 270                         value++;
 271                         }
 272                 if (*value == '-')
 273                         {
 274                         onoff = 0;
 275                         value++;
 276                         }
 277                 if (strcasecmp(value, "automatic"))
 278                         return 0;
 279                 }
 280         else if (cctx->flags & SSL_CONF_FLAG_CMDLINE)
 281                 {
 282                 if (!strcmp(value, "auto"))
 283                         onoff = 1;
 284                 }
 285
 286         if (onoff != -1)
 287                 {
 288                 if (cctx->ctx)
 289                         rv = SSL_CTX_set_ecdh_auto(cctx->ctx, onoff);
 290                 else if (cctx->ssl)
 291                         rv = SSL_set_ecdh_auto(cctx->ssl, onoff);
 292                 }
 293         else
 294                 {
 295                 EC_KEY *ecdh;
 296                 int nid;
 297                 nid = EC_curve_nist2nid(value);
 298                 if (nid == NID_undef)
 299                         nid = OBJ_sn2nid(value);
 300                 if (nid == 0)
 301                         return 0;
 302                 ecdh = EC_KEY_new_by_curve_name(nid);
 303                 if (!ecdh)
 304                         return 0;
 305                 if (cctx->ctx)
 306                         rv = SSL_CTX_set_tmp_ecdh(cctx->ctx, ecdh);
 307                 else if (cctx->ssl)
 308                         rv = SSL_set_tmp_ecdh(cctx->ssl, ecdh);
 309                 EC_KEY_free(ecdh);
 310                 }
 311
 312         return rv > 0;
 313         }
 314
 315 static int cmd_cipher_list(SSL_CONF_CTX *cctx, const char *value)
 316         {
 317         int rv = 1;
 318         if (cctx->ctx)
 319                 rv = SSL_CTX_set_cipher_list(cctx->ctx, value);
 320         if (cctx->ssl)
 321                 rv = SSL_set_cipher_list(cctx->ssl, value);
 322         return rv;
 323         }
 324
 325 static int cmd_protocol(SSL_CONF_CTX *cctx, const char *value)
 326         {
 327         static const ssl_flag_tbl ssl_protocol_list[] =
 328                 {
 329                 SSL_FLAG_TBL_INV("ALL", SSL_OP_NO_SSL_MASK),
 330                 SSL_FLAG_TBL_INV("SSLv2", SSL_OP_NO_SSLv2),
 331                 SSL_FLAG_TBL_INV("SSLv3", SSL_OP_NO_SSLv3),
 332                 SSL_FLAG_TBL_INV("TLSv1", SSL_OP_NO_TLSv1),
 333                 SSL_FLAG_TBL_INV("TLSv1.1", SSL_OP_NO_TLSv1_1),
 334                 SSL_FLAG_TBL_INV("TLSv1.2", SSL_OP_NO_TLSv1_2)
 335                 };
 336         if (!(cctx->flags & SSL_CONF_FLAG_FILE))
 337                 return -2;
 338         cctx->tbl = ssl_protocol_list;
 339         cctx->ntbl = sizeof(ssl_protocol_list)/sizeof(ssl_flag_tbl);
 340         return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
 341         }
 342
 343 static int cmd_options(SSL_CONF_CTX *cctx, const char *value)
 344         {
 345         static const ssl_flag_tbl ssl_option_list[] =
 346                 {
 347                 SSL_FLAG_TBL_INV("SessionTicket", SSL_OP_NO_TICKET),
 348                 SSL_FLAG_TBL_INV("EmptyFragments", SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS),
 349                 SSL_FLAG_TBL("Bugs", SSL_OP_ALL),
 350                 SSL_FLAG_TBL_INV("Compression", SSL_OP_NO_COMPRESSION),
 351                 SSL_FLAG_TBL_SRV("ServerPreference", SSL_OP_CIPHER_SERVER_PREFERENCE),
 352                 SSL_FLAG_TBL_SRV("DHSingle", SSL_OP_SINGLE_DH_USE),
 353                 SSL_FLAG_TBL_SRV("ECDHSingle", SSL_OP_SINGLE_ECDH_USE),
 354                 SSL_FLAG_TBL("UnsafeLegacyRenegotiation", SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION),
 355                 };
 356         if (!(cctx->flags & SSL_CONF_FLAG_FILE))
 357                 return -2;
 358         if (value == NULL)
 359                 return -3;
 360         cctx->tbl = ssl_option_list;
 361         cctx->ntbl = sizeof(ssl_option_list)/sizeof(ssl_flag_tbl);
 362         return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
 363         }
 364
 365 typedef struct
 366         {
 367         int (*cmd)(SSL_CONF_CTX *cctx, const char *value);
 368         const char *str_file;
 369         const char *str_cmdline;
 370         } ssl_conf_cmd_tbl;
 371
 372 /* Table of supported patameters */
 373
 374 static ssl_conf_cmd_tbl ssl_conf_cmds[] = {
 375         {cmd_sigalgs,           "SignatureAlgorithms", "sigalgs"},
 376         {cmd_client_sigalgs,    "ClientSignatureAlgorithms", "client_sigalgs"},
 377         {cmd_curves,            "Curves", "curves"},
 378         {cmd_ecdhparam,         "ECDHParameters", "named_curve"},
 379         {cmd_cipher_list,       "CipherString", "cipher"},
 380         {cmd_protocol,          "Protocol", NULL},
 381         {cmd_options,           "Options", NULL},
 382 };
 383
 384 int SSL_CONF_cmd(SSL_CONF_CTX *cctx, const char *cmd, const char *value)
 385         {
 386         ssl_conf_cmd_tbl *t, *runcmd = NULL;
 387         size_t i;
 388         if (cmd == NULL)
 389                 {
 390                 SSLerr(SSL_F_SSL_CONF_CTX_CMD, SSL_R_INVALID_NULL_CMD_NAME);
 391                 return 0;
 392                 }
 393         /* If a prefix is set, check and skip */
 394         if (cctx->prefix)
 395                 {
 396                 if (strlen(cmd) <= cctx->prefixlen)
 397                         return -2;
 398                 if (cctx->flags & SSL_CONF_FLAG_CMDLINE &&
 399                         strncmp(cmd, cctx->prefix, cctx->prefixlen))
 400                         return -2;
 401                 if (cctx->flags & SSL_CONF_FLAG_FILE &&
 402                         strncasecmp(cmd, cctx->prefix, cctx->prefixlen))
 403                         return -2;
 404                 cmd += cctx->prefixlen;
 405                 }
 406         else if (cctx->flags & SSL_CONF_FLAG_CMDLINE)
 407                 {
 408                 if (*cmd != '-' || !cmd[1])
 409                         return -2;
 410                 cmd++;
 411                 }
 412
 413         /* Look for matching parameter name in table */
 414         for (i = 0, t = ssl_conf_cmds;
 415                 i < sizeof(ssl_conf_cmds)/sizeof(ssl_conf_cmd_tbl); i++, t++)
 416                 {
 417                 if (cctx->flags & SSL_CONF_FLAG_CMDLINE)
 418                         {
 419                         if (t->str_cmdline && !strcmp(t->str_cmdline, cmd))
 420                                 {
 421                                 runcmd = t;
 422                                 break;
 423                                 }
 424                         }
 425                 if (cctx->flags & SSL_CONF_FLAG_FILE)
 426                         {
 427                         if (t->str_file && !strcasecmp(t->str_file, cmd))
 428                                 {
 429                                 runcmd = t;
 430                                 break;
 431                                 }
 432                         }
 433                 }
 434
 435         if (runcmd)
 436                 {
 437                 if (value == NULL)
 438                         return -3;
 439                 if (t->cmd(cctx, value))
 440                         return 2;
 441                 if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS)
 442                         {
 443                         SSLerr(SSL_F_SSL_CONF_CTX_CMD, SSL_R_BAD_VALUE);
 444                         ERR_add_error_data(4, "cmd=", cmd, ", value=", value);
 445                         }
 446                 return -1;
 447                 }
 448
 449         if (cctx->flags & SSL_CONF_FLAG_CMDLINE)
 450                 {
 451                 if (ctrl_str_option(cctx, cmd))
 452                         return 1;
 453                 }
 454
 455         if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS)
 456                 {
 457                 SSLerr(SSL_F_SSL_CONF_CTX_CMD, SSL_R_UNKNOWN_CMD_NAME);
 458                 ERR_add_error_data(2, "cmd=", cmd);
 459                 }
 460
 461         return -2;
 462         }
 463
 464 int SSL_CONF_cmd_argv(SSL_CONF_CTX *cctx, int *pargc, char ***pargv)
 465         {
 466         int rv;
 467         const char *arg = NULL, *argn;
 468         if (pargc && *pargc == 0)
 469                 return 0;
 470         if (!pargc || *pargc > 0)
 471                 arg = **pargv;
 472         if (arg == NULL)
 473                 return 0;
 474         if (!pargc || *pargc > 1)
 475                 argn = (*pargv)[1];
 476         else
 477                 argn = NULL;
 478         cctx->flags &= ~SSL_CONF_FLAG_FILE;
 479         cctx->flags |= SSL_CONF_FLAG_CMDLINE;
 480         rv = SSL_CONF_cmd(cctx, arg, argn);
 481         if (rv > 0)
 482                 {
 483                 /* Success: update pargc, pargv */
 484                 (*pargv) += rv;
 485                 if (pargc)
 486                         (*pargc) -= rv;
 487                 return rv;
 488                 }
 489         /* Unknown swicth: indicate no arguments processed */
 490         if (rv == -2)
 491                 return 0;
 492         /* Some error occurred processing command, return fatal error */
 493         if (rv == 0)
 494                 return -1;
 495         return rv;
 496         }
 497
 498 SSL_CONF_CTX *SSL_CONF_CTX_new(void)
 499         {
 500         SSL_CONF_CTX *ret;
 501         ret = OPENSSL_malloc(sizeof(SSL_CONF_CTX));
 502         if (ret)
 503                 {
 504                 ret->flags = 0;
 505                 ret->prefix = NULL;
 506                 ret->prefixlen = 0;
 507                 ret->ssl = NULL;
 508                 ret->ctx = NULL;
 509                 ret->poptions = NULL;
 510                 ret->pcert_flags = NULL;
 511                 ret->tbl = NULL;
 512                 ret->ntbl = 0;
 513                 }
 514         return ret;
 515         }
 516
 517 void SSL_CONF_CTX_free(SSL_CONF_CTX *cctx)
 518         {
 519         if (cctx)
 520                 {
 521                 if (cctx->prefix)
 522                         OPENSSL_free(cctx->prefix);
 523                 OPENSSL_free(cctx);
 524                 }
 525         }
 526
 527 unsigned int SSL_CONF_CTX_set_flags(SSL_CONF_CTX *cctx, unsigned int flags)
 528         {
 529         cctx->flags |= flags;
 530         return cctx->flags;
 531         }
 532
 533 unsigned int SSL_CONF_CTX_clear_flags(SSL_CONF_CTX *cctx, unsigned int flags)
 534         {
 535         cctx->flags &= ~flags;
 536         return cctx->flags;
 537         }
 538
 539 int SSL_CONF_CTX_set1_prefix(SSL_CONF_CTX *cctx, const char *pre)
 540         {
 541         char *tmp = NULL;
 542         if (pre)
 543                 {
 544                 tmp = BUF_strdup(pre);
 545                 if (tmp == NULL)
 546                         return 0;
 547                 }
 548         if (cctx->prefix)
 549                 OPENSSL_free(cctx->prefix);
 550         cctx->prefix = tmp;
 551         if (tmp)
 552                 cctx->prefixlen = strlen(tmp);
 553         else
 554                 cctx->prefixlen = 0;
 555         return 1;
 556         }
 557
 558 void SSL_CONF_CTX_set_ssl(SSL_CONF_CTX *cctx, SSL *ssl)
 559         {
 560         cctx->ssl = ssl;
 561         cctx->ctx = NULL;
 562         if (ssl)
 563                 {
 564                 cctx->poptions = &ssl->options;
 565                 cctx->pcert_flags = &ssl->cert->cert_flags;
 566                 }
 567         else
 568                 {
 569                 cctx->poptions = NULL;
 570                 cctx->pcert_flags = NULL;
 571                 }
 572         }
 573
 574 void SSL_CONF_CTX_set_ssl_ctx(SSL_CONF_CTX *cctx, SSL_CTX *ctx)
 575         {
 576         cctx->ctx = ctx;
 577         cctx->ssl = NULL;
 578         if (ctx)
 579                 {
 580                 cctx->poptions = &ctx->options;
 581                 cctx->pcert_flags = &ctx->cert->cert_flags;
 582                 }
 583         else
 584                 {
 585                 cctx->poptions = NULL;
 586                 cctx->pcert_flags = NULL;
 587                 }
 588         }