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 #ifndef OPENSSL_NO_DH
  66 #include <openssl/dh.h>
  67 #endif
  68
  69 /* structure holding name tables. This is used for pemitted elements in
  70  * lists such as TLSv1 and single command line switches such as no_tls1
  71  */
  72
  73 typedef struct
  74         {
  75         const char *name;
  76         int namelen;
  77         unsigned int name_flags;
  78         unsigned long option_value;
  79         } ssl_flag_tbl;
  80
  81 /* Sense of name is inverted e.g. "TLSv1" will clear SSL_OP_NO_TLSv1 */
  82 #define SSL_TFLAG_INV   0x1
  83 /* Flags refers to cert_flags not options */
  84 #define SSL_TFLAG_CERT  0x2
  85 /* Option can only be used for clients */
  86 #define SSL_TFLAG_CLIENT SSL_CONF_FLAG_CLIENT
  87 /* Option can only be used for servers */
  88 #define SSL_TFLAG_SERVER SSL_CONF_FLAG_SERVER
  89 #define SSL_TFLAG_BOTH (SSL_TFLAG_CLIENT|SSL_TFLAG_SERVER)
  90
  91 #define SSL_FLAG_TBL(str, flag) \
  92         {str, (int)(sizeof(str) - 1), SSL_TFLAG_BOTH, flag}
  93 #define SSL_FLAG_TBL_SRV(str, flag) \
  94         {str, (int)(sizeof(str) - 1), SSL_TFLAG_SERVER, flag}
  95 #define SSL_FLAG_TBL_CLI(str, flag) \
  96         {str, (int)(sizeof(str) - 1), SSL_TFLAG_CLIENT, flag}
  97 #define SSL_FLAG_TBL_INV(str, flag) \
  98         {str, (int)(sizeof(str) - 1), SSL_TFLAG_INV|SSL_TFLAG_BOTH, flag}
  99 #define SSL_FLAG_TBL_SRV_INV(str, flag) \
 100         {str, (int)(sizeof(str) - 1), SSL_TFLAG_INV|SSL_TFLAG_SERVER, flag}
 101 #define SSL_FLAG_TBL_CERT(str, flag) \
 102         {str, (int)(sizeof(str) - 1), SSL_TFLAG_CERT|SSL_TFLAG_BOTH, flag}
 103
 104 /* Opaque structure containing SSL configuration context.
 105  */
 106
 107 struct ssl_conf_ctx_st
 108         {
 109         /* Various flags indicating (among other things) which options we
 110          * will recognise.
 111          */
 112         unsigned int flags;
 113         /* Prefix and length of commands */
 114         char *prefix;
 115         size_t prefixlen;
 116         /* SSL_CTX or SSL structure to perform operations on */
 117         SSL_CTX *ctx;
 118         SSL *ssl;
 119         /* Pointer to SSL or SSL_CTX options field or NULL if none */
 120         unsigned long *poptions;
 121         /* Pointer to SSL or SSL_CTX cert_flags or NULL if none */
 122         unsigned int *pcert_flags;
 123         /* Current flag table being worked on */
 124         const ssl_flag_tbl *tbl;
 125         /* Size of table */
 126         size_t ntbl;
 127         };
 128
 129 static int ssl_match_option(SSL_CONF_CTX *cctx, const ssl_flag_tbl *tbl,
 130                                 const char *name, int namelen, int onoff)
 131         {
 132         /* If name not relevant for context skip */
 133         if (!(cctx->flags & tbl->name_flags & SSL_TFLAG_BOTH))
 134                 return 0;
 135         if (namelen == -1)
 136                 {
 137                 if (strcmp(tbl->name, name))
 138                         return 0;
 139                 }
 140         else if (tbl->namelen != namelen || strncasecmp(tbl->name, name, namelen))
 141                 return 0;
 142         if (cctx->poptions)
 143                 {
 144                 if (tbl->name_flags & SSL_TFLAG_INV)
 145                         onoff ^= 1;
 146                 if (tbl->name_flags & SSL_TFLAG_CERT)
 147                         {
 148                         if (onoff)
 149                                 *cctx->pcert_flags |= tbl->option_value;
 150                         else
 151                                 *cctx->pcert_flags &= ~tbl->option_value;
 152                         }
 153                 else
 154                         {
 155                         if (onoff)
 156                                 *cctx->poptions |= tbl->option_value;
 157                         else
 158                                 *cctx->poptions &= ~tbl->option_value;
 159                         }
 160                 }
 161         return 1;
 162         }
 163
 164 static int ssl_set_option_list(const char *elem, int len, void *usr)
 165         {
 166         SSL_CONF_CTX *cctx = usr;
 167         size_t i;
 168         const ssl_flag_tbl *tbl;
 169         int onoff = 1;
 170         /* len == -1 indicates not being called in list context, just for
 171          * single command line switches, so don't allow +, -.
 172          */
 173         if (len != -1)
 174                 {
 175                 if (*elem == '+')
 176                         {
 177                         elem++;
 178                         len--;
 179                         onoff = 1;
 180                         }
 181                 else if (*elem == '-')
 182                         {
 183                         elem++;
 184                         len--;
 185                         onoff = 0;
 186                         }
 187                 }
 188         for (i = 0, tbl = cctx->tbl; i < cctx->ntbl; i++, tbl++)
 189                 {
 190                 if (ssl_match_option(cctx, tbl, elem, len, onoff))
 191                         return 1;
 192                 }
 193         return 0;
 194         }
 195
 196 /* Single command line switches with no argument e.g. -no_ssl3 */
 197 static int ctrl_str_option(SSL_CONF_CTX *cctx, const char *cmd)
 198         {
 199         static const ssl_flag_tbl ssl_option_single[] =
 200                 {
 201                 SSL_FLAG_TBL("no_ssl2", SSL_OP_NO_SSLv2),
 202                 SSL_FLAG_TBL("no_ssl3", SSL_OP_NO_SSLv3),
 203                 SSL_FLAG_TBL("no_tls1", SSL_OP_NO_TLSv1),
 204                 SSL_FLAG_TBL("no_tls1_1", SSL_OP_NO_TLSv1_1),
 205                 SSL_FLAG_TBL("no_tls1_2", SSL_OP_NO_TLSv1_2),
 206                 SSL_FLAG_TBL("bugs", SSL_OP_ALL),
 207                 SSL_FLAG_TBL("no_comp", SSL_OP_NO_COMPRESSION),
 208                 SSL_FLAG_TBL_SRV("ecdh_single", SSL_OP_SINGLE_ECDH_USE),
 209 #ifndef OPENSSL_NO_TLSEXT
 210                 SSL_FLAG_TBL("no_ticket", SSL_OP_NO_TICKET),
 211 #endif
 212                 SSL_FLAG_TBL_SRV("serverpref", SSL_OP_CIPHER_SERVER_PREFERENCE),
 213                 SSL_FLAG_TBL("legacy_renegotiation", SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION),
 214                 SSL_FLAG_TBL_SRV("legacy_server_connect", SSL_OP_LEGACY_SERVER_CONNECT),
 215                 SSL_FLAG_TBL_SRV_INV("no_legacy_server_connect", SSL_OP_LEGACY_SERVER_CONNECT),
 216                 SSL_FLAG_TBL_CERT("strict", SSL_CERT_FLAG_TLS_STRICT),
 217 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
 218                 SSL_FLAG_TBL_CERT("debug_broken_protocol", SSL_CERT_FLAG_BROKEN_PROTOCOL),
 219 #endif
 220                 };
 221         cctx->tbl = ssl_option_single;
 222         cctx->ntbl = sizeof(ssl_option_single)/sizeof(ssl_flag_tbl);
 223         return ssl_set_option_list(cmd, -1, cctx);
 224         }
 225
 226 /* Set supported signature algorithms */
 227 static int cmd_SignatureAlgorithms(SSL_CONF_CTX *cctx, const char *value)
 228         {
 229         int rv;
 230         if (cctx->ssl)
 231                 rv = SSL_set1_sigalgs_list(cctx->ssl, value);
 232         /* NB: ctx == NULL performs syntax checking only */
 233         else
 234                 rv = SSL_CTX_set1_sigalgs_list(cctx->ctx, value);
 235         return rv > 0;
 236         }
 237 /* Set supported client signature algorithms */
 238 static int cmd_ClientSignatureAlgorithms(SSL_CONF_CTX *cctx, const char *value)
 239         {
 240         int rv;
 241         if (cctx->ssl)
 242                 rv = SSL_set1_client_sigalgs_list(cctx->ssl, value);
 243         /* NB: ctx == NULL performs syntax checking only */
 244         else
 245                 rv = SSL_CTX_set1_client_sigalgs_list(cctx->ctx, value);
 246         return rv > 0;
 247         }
 248
 249 static int cmd_Curves(SSL_CONF_CTX *cctx, const char *value)
 250         {
 251         int rv;
 252         if (cctx->ssl)
 253                 rv = SSL_set1_curves_list(cctx->ssl, value);
 254         /* NB: ctx == NULL performs syntax checking only */
 255         else
 256                 rv = SSL_CTX_set1_curves_list(cctx->ctx, value);
 257         return rv > 0;
 258         }
 259 #ifndef OPENSSL_NO_ECDH
 260 /* ECDH temporary parameters */
 261 static int cmd_ECDHParameters(SSL_CONF_CTX *cctx, const char *value)
 262         {
 263         int onoff = -1, rv = 1;
 264         if (!(cctx->flags & SSL_CONF_FLAG_SERVER))
 265                 return -2;
 266         if (cctx->flags & SSL_CONF_FLAG_FILE)
 267                 {
 268                 if (*value == '+')
 269                         {
 270                         onoff = 1;
 271                         value++;
 272                         }
 273                 if (*value == '-')
 274                         {
 275                         onoff = 0;
 276                         value++;
 277                         }
 278                 if (!strcasecmp(value, "automatic"))
 279                         {
 280                         if (onoff == -1)
 281                                 onoff = 1;
 282                         }
 283                 else if (onoff != -1)
 284                         return 0;
 285                 }
 286         else if (cctx->flags & SSL_CONF_FLAG_CMDLINE)
 287                 {
 288                 if (!strcmp(value, "auto"))
 289                         onoff = 1;
 290                 }
 291
 292         if (onoff != -1)
 293                 {
 294                 if (cctx->ctx)
 295                         rv = SSL_CTX_set_ecdh_auto(cctx->ctx, onoff);
 296                 else if (cctx->ssl)
 297                         rv = SSL_set_ecdh_auto(cctx->ssl, onoff);
 298                 }
 299         else
 300                 {
 301                 EC_KEY *ecdh;
 302                 int nid;
 303                 nid = EC_curve_nist2nid(value);
 304                 if (nid == NID_undef)
 305                         nid = OBJ_sn2nid(value);
 306                 if (nid == 0)
 307                         return 0;
 308                 ecdh = EC_KEY_new_by_curve_name(nid);
 309                 if (!ecdh)
 310                         return 0;
 311                 if (cctx->ctx)
 312                         rv = SSL_CTX_set_tmp_ecdh(cctx->ctx, ecdh);
 313                 else if (cctx->ssl)
 314                         rv = SSL_set_tmp_ecdh(cctx->ssl, ecdh);
 315                 EC_KEY_free(ecdh);
 316                 }
 317
 318         return rv > 0;
 319         }
 320 #endif
 321 static int cmd_CipherString(SSL_CONF_CTX *cctx, const char *value)
 322         {
 323         int rv = 1;
 324         if (cctx->ctx)
 325                 rv = SSL_CTX_set_cipher_list(cctx->ctx, value);
 326         if (cctx->ssl)
 327                 rv = SSL_set_cipher_list(cctx->ssl, value);
 328         return rv > 0;
 329         }
 330
 331 static int cmd_Protocol(SSL_CONF_CTX *cctx, const char *value)
 332         {
 333         static const ssl_flag_tbl ssl_protocol_list[] =
 334                 {
 335                 SSL_FLAG_TBL_INV("ALL", SSL_OP_NO_SSL_MASK),
 336                 SSL_FLAG_TBL_INV("SSLv2", SSL_OP_NO_SSLv2),
 337                 SSL_FLAG_TBL_INV("SSLv3", SSL_OP_NO_SSLv3),
 338                 SSL_FLAG_TBL_INV("TLSv1", SSL_OP_NO_TLSv1),
 339                 SSL_FLAG_TBL_INV("TLSv1.1", SSL_OP_NO_TLSv1_1),
 340                 SSL_FLAG_TBL_INV("TLSv1.2", SSL_OP_NO_TLSv1_2)
 341                 };
 342         if (!(cctx->flags & SSL_CONF_FLAG_FILE))
 343                 return -2;
 344         cctx->tbl = ssl_protocol_list;
 345         cctx->ntbl = sizeof(ssl_protocol_list)/sizeof(ssl_flag_tbl);
 346         return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
 347         }
 348
 349 static int cmd_Options(SSL_CONF_CTX *cctx, const char *value)
 350         {
 351         static const ssl_flag_tbl ssl_option_list[] =
 352                 {
 353                 SSL_FLAG_TBL_INV("SessionTicket", SSL_OP_NO_TICKET),
 354                 SSL_FLAG_TBL_INV("EmptyFragments", SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS),
 355                 SSL_FLAG_TBL("Bugs", SSL_OP_ALL),
 356                 SSL_FLAG_TBL_INV("Compression", SSL_OP_NO_COMPRESSION),
 357                 SSL_FLAG_TBL_SRV("ServerPreference", SSL_OP_CIPHER_SERVER_PREFERENCE),
 358                 SSL_FLAG_TBL_SRV("DHSingle", SSL_OP_SINGLE_DH_USE),
 359                 SSL_FLAG_TBL_SRV("ECDHSingle", SSL_OP_SINGLE_ECDH_USE),
 360                 SSL_FLAG_TBL("UnsafeLegacyRenegotiation", SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION),
 361                 };
 362         if (!(cctx->flags & SSL_CONF_FLAG_FILE))
 363                 return -2;
 364         if (value == NULL)
 365                 return -3;
 366         cctx->tbl = ssl_option_list;
 367         cctx->ntbl = sizeof(ssl_option_list)/sizeof(ssl_flag_tbl);
 368         return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
 369         }
 370
 371 static int cmd_Certificate(SSL_CONF_CTX *cctx, const char *value)
 372         {
 373         int rv = 1;
 374         if (!(cctx->flags & SSL_CONF_FLAG_CERTIFICATE))
 375                 return -2;
 376         if (cctx->ctx)
 377                 rv = SSL_CTX_use_certificate_chain_file(cctx->ctx, value);
 378         if (cctx->ssl)
 379                 rv = SSL_use_certificate_file(cctx->ssl, value, SSL_FILETYPE_PEM);
 380         return rv > 0;
 381         }
 382
 383 static int cmd_PrivateKey(SSL_CONF_CTX *cctx, const char *value)
 384         {
 385         int rv = 1;
 386         if (!(cctx->flags & SSL_CONF_FLAG_CERTIFICATE))
 387                 return -2;
 388         if (cctx->ctx)
 389                 rv = SSL_CTX_use_PrivateKey_file(cctx->ctx, value, SSL_FILETYPE_PEM);
 390         if (cctx->ssl)
 391                 rv = SSL_use_PrivateKey_file(cctx->ssl, value, SSL_FILETYPE_PEM);
 392         return rv > 0;
 393         }
 394 #ifndef OPENSSL_NO_DH
 395 static int cmd_DHParameters(SSL_CONF_CTX *cctx, const char *value)
 396         {
 397         int rv = 0;
 398         DH *dh = NULL;
 399         BIO *in = NULL;
 400         if (!(cctx->flags & SSL_CONF_FLAG_CERTIFICATE))
 401                 return -2;
 402         if (cctx->ctx || cctx->ssl)
 403                 {
 404                 in = BIO_new(BIO_s_file_internal());
 405                 if (!in)
 406                         goto end;
 407                 if (BIO_read_filename(in, value) <= 0)
 408                         goto end;
 409                 dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
 410                 if (!dh)
 411                         goto end;
 412                 }
 413         else
 414                 return 1;
 415         if (cctx->ctx)
 416                 rv = SSL_CTX_set_tmp_dh(cctx->ctx, dh);
 417         if (cctx->ssl)
 418                 rv = SSL_set_tmp_dh(cctx->ssl, dh);
 419         end:
 420         if (dh)
 421                 DH_free(dh);
 422         if (in)
 423                 BIO_free(in);
 424         return rv > 0;
 425         }
 426 #endif
 427 typedef struct
 428         {
 429         int (*cmd)(SSL_CONF_CTX *cctx, const char *value);
 430         const char *str_file;
 431         const char *str_cmdline;
 432         unsigned int value_type;
 433         } ssl_conf_cmd_tbl;
 434
 435 /* Table of supported parameters */
 436
 437 #define SSL_CONF_CMD(name, cmdopt, type) \
 438         {cmd_##name, #name, cmdopt, type}
 439
 440 #define SSL_CONF_CMD_STRING(name, cmdopt) \
 441         SSL_CONF_CMD(name, cmdopt, SSL_CONF_TYPE_STRING)
 442
 443 static const ssl_conf_cmd_tbl ssl_conf_cmds[] = {
 444         SSL_CONF_CMD_STRING(SignatureAlgorithms, "sigalgs"),
 445         SSL_CONF_CMD_STRING(ClientSignatureAlgorithms, "client_sigalgs"),
 446         SSL_CONF_CMD_STRING(Curves, "curves"),
 447 #ifndef OPENSSL_NO_ECDH
 448         SSL_CONF_CMD_STRING(ECDHParameters, "named_curve"),
 449 #endif
 450         SSL_CONF_CMD_STRING(CipherString, "cipher"),
 451         SSL_CONF_CMD_STRING(Protocol, NULL),
 452         SSL_CONF_CMD_STRING(Options, NULL),
 453         SSL_CONF_CMD(Certificate, "cert", SSL_CONF_TYPE_FILE),
 454         SSL_CONF_CMD(PrivateKey, "key", SSL_CONF_TYPE_FILE),
 455 #ifndef OPENSSL_NO_DH
 456         SSL_CONF_CMD(DHParameters, "dhparam", SSL_CONF_TYPE_FILE)
 457 #endif
 458 };
 459
 460 static int ssl_conf_cmd_skip_prefix(SSL_CONF_CTX *cctx, const char **pcmd)
 461         {
 462         if (!pcmd || !*pcmd)
 463                 return 0;
 464         /* If a prefix is set, check and skip */
 465         if (cctx->prefix)
 466                 {
 467                 if (strlen(*pcmd) <= cctx->prefixlen)
 468                         return 0;
 469                 if (cctx->flags & SSL_CONF_FLAG_CMDLINE &&
 470                         strncmp(*pcmd, cctx->prefix, cctx->prefixlen))
 471                         return 0;
 472                 if (cctx->flags & SSL_CONF_FLAG_FILE &&
 473                         strncasecmp(*pcmd, cctx->prefix, cctx->prefixlen))
 474                         return 0;
 475                 *pcmd += cctx->prefixlen;
 476                 }
 477         else if (cctx->flags & SSL_CONF_FLAG_CMDLINE)
 478                 {
 479                 if (**pcmd != '-' || !(*pcmd)[1])
 480                         return 0;
 481                 *pcmd += 1;
 482                 }
 483         return 1;
 484         }
 485
 486 static const ssl_conf_cmd_tbl *ssl_conf_cmd_lookup(SSL_CONF_CTX *cctx, const char *cmd)
 487         {
 488         const ssl_conf_cmd_tbl *t;
 489         size_t i;
 490         if (cmd == NULL)
 491                 return NULL;
 492
 493         /* Look for matching parameter name in table */
 494         for (i = 0, t = ssl_conf_cmds;
 495                 i < sizeof(ssl_conf_cmds)/sizeof(ssl_conf_cmd_tbl); i++, t++)
 496                 {
 497                 if (cctx->flags & SSL_CONF_FLAG_CMDLINE)
 498                         {
 499                         if (t->str_cmdline && !strcmp(t->str_cmdline, cmd))
 500                                 return t;
 501                         }
 502                 if (cctx->flags & SSL_CONF_FLAG_FILE)
 503                         {
 504                         if (t->str_file && !strcasecmp(t->str_file, cmd))
 505                                 return t;
 506                         }
 507                 }
 508         return NULL;
 509         }
 510
 511 int SSL_CONF_cmd(SSL_CONF_CTX *cctx, const char *cmd, const char *value)
 512         {
 513         const ssl_conf_cmd_tbl *runcmd;
 514         if (cmd == NULL)
 515                 {
 516                 SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_INVALID_NULL_CMD_NAME);
 517                 return 0;
 518                 }
 519
 520         if (!ssl_conf_cmd_skip_prefix(cctx, &cmd))
 521                 return -2;
 522
 523         runcmd = ssl_conf_cmd_lookup(cctx, cmd);
 524
 525         if (runcmd)
 526                 {
 527                 int rv;
 528                 if (value == NULL)
 529                         return -3;
 530                 rv = runcmd->cmd(cctx, value);
 531                 if (rv > 0)
 532                         return 2;
 533                 if (rv == -2)
 534                         return -2;
 535                 if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS)
 536                         {
 537                         SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_BAD_VALUE);
 538                         ERR_add_error_data(4, "cmd=", cmd, ", value=", value);
 539                         }
 540                 return 0;
 541                 }
 542
 543         if (cctx->flags & SSL_CONF_FLAG_CMDLINE)
 544                 {
 545                 if (ctrl_str_option(cctx, cmd))
 546                         return 1;
 547                 }
 548
 549         if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS)
 550                 {
 551                 SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_UNKNOWN_CMD_NAME);
 552                 ERR_add_error_data(2, "cmd=", cmd);
 553                 }
 554
 555         return -2;
 556         }
 557
 558 int SSL_CONF_cmd_argv(SSL_CONF_CTX *cctx, int *pargc, char ***pargv)
 559         {
 560         int rv;
 561         const char *arg = NULL, *argn;
 562         if (pargc && *pargc == 0)
 563                 return 0;
 564         if (!pargc || *pargc > 0)
 565                 arg = **pargv;
 566         if (arg == NULL)
 567                 return 0;
 568         if (!pargc || *pargc > 1)
 569                 argn = (*pargv)[1];
 570         else
 571                 argn = NULL;
 572         cctx->flags &= ~SSL_CONF_FLAG_FILE;
 573         cctx->flags |= SSL_CONF_FLAG_CMDLINE;
 574         rv = SSL_CONF_cmd(cctx, arg, argn);
 575         if (rv > 0)
 576                 {
 577                 /* Success: update pargc, pargv */
 578                 (*pargv) += rv;
 579                 if (pargc)
 580                         (*pargc) -= rv;
 581                 return rv;
 582                 }
 583         /* Unknown switch: indicate no arguments processed */
 584         if (rv == -2)
 585                 return 0;
 586         /* Some error occurred processing command, return fatal error */
 587         if (rv == 0)
 588                 return -1;
 589         return rv;
 590         }
 591
 592 int SSL_CONF_cmd_value_type(SSL_CONF_CTX *cctx, const char *cmd)
 593         {
 594         if (ssl_conf_cmd_skip_prefix(cctx, &cmd))
 595                 {
 596                 const ssl_conf_cmd_tbl *runcmd;
 597                 runcmd = ssl_conf_cmd_lookup(cctx, cmd);
 598                 if (runcmd)
 599                         return runcmd->value_type;
 600                 }
 601         return SSL_CONF_TYPE_UNKNOWN;
 602         }
 603
 604 SSL_CONF_CTX *SSL_CONF_CTX_new(void)
 605         {
 606         SSL_CONF_CTX *ret;
 607         ret = OPENSSL_malloc(sizeof(SSL_CONF_CTX));
 608         if (ret)
 609                 {
 610                 ret->flags = 0;
 611                 ret->prefix = NULL;
 612                 ret->prefixlen = 0;
 613                 ret->ssl = NULL;
 614                 ret->ctx = NULL;
 615                 ret->poptions = NULL;
 616                 ret->pcert_flags = NULL;
 617                 ret->tbl = NULL;
 618                 ret->ntbl = 0;
 619                 }
 620         return ret;
 621         }
 622
 623 int SSL_CONF_CTX_finish(SSL_CONF_CTX *cctx)
 624         {
 625         return 1;
 626         }
 627
 628 void SSL_CONF_CTX_free(SSL_CONF_CTX *cctx)
 629         {
 630         if (cctx)
 631                 {
 632                 if (cctx->prefix)
 633                         OPENSSL_free(cctx->prefix);
 634                 OPENSSL_free(cctx);
 635                 }
 636         }
 637
 638 unsigned int SSL_CONF_CTX_set_flags(SSL_CONF_CTX *cctx, unsigned int flags)
 639         {
 640         cctx->flags |= flags;
 641         return cctx->flags;
 642         }
 643
 644 unsigned int SSL_CONF_CTX_clear_flags(SSL_CONF_CTX *cctx, unsigned int flags)
 645         {
 646         cctx->flags &= ~flags;
 647         return cctx->flags;
 648         }
 649
 650 int SSL_CONF_CTX_set1_prefix(SSL_CONF_CTX *cctx, const char *pre)
 651         {
 652         char *tmp = NULL;
 653         if (pre)
 654                 {
 655                 tmp = BUF_strdup(pre);
 656                 if (tmp == NULL)
 657                         return 0;
 658                 }
 659         if (cctx->prefix)
 660                 OPENSSL_free(cctx->prefix);
 661         cctx->prefix = tmp;
 662         if (tmp)
 663                 cctx->prefixlen = strlen(tmp);
 664         else
 665                 cctx->prefixlen = 0;
 666         return 1;
 667         }
 668
 669 void SSL_CONF_CTX_set_ssl(SSL_CONF_CTX *cctx, SSL *ssl)
 670         {
 671         cctx->ssl = ssl;
 672         cctx->ctx = NULL;
 673         if (ssl)
 674                 {
 675                 cctx->poptions = &ssl->options;
 676                 cctx->pcert_flags = &ssl->cert->cert_flags;
 677                 }
 678         else
 679                 {
 680                 cctx->poptions = NULL;
 681                 cctx->pcert_flags = NULL;
 682                 }
 683         }
 684
 685 void SSL_CONF_CTX_set_ssl_ctx(SSL_CONF_CTX *cctx, SSL_CTX *ctx)
 686         {
 687         cctx->ctx = ctx;
 688         cctx->ssl = NULL;
 689         if (ctx)
 690                 {
 691                 cctx->poptions = &ctx->options;
 692                 cctx->pcert_flags = &ctx->cert->cert_flags;
 693                 }
 694         else
 695                 {
 696                 cctx->poptions = NULL;
 697                 cctx->pcert_flags = NULL;
 698                 }
 699         }