ssl/ssl_conf.c

   1 /*
   2  * ! \file ssl/ssl_conf.c \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 /*
  70  * structure holding name tables. This is used for pemitted elements in lists
  71  * such as TLSv1 and single command line switches such as no_tls1
  72  */
  73
  74 typedef struct {
  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 /*
 105  * Opaque structure containing SSL configuration context.
 106  */
 107
 108 struct ssl_conf_ctx_st {
 109     /*
 110      * Various flags indicating (among other things) which options we will
 111      * recognise.
 112      */
 113     unsigned int flags;
 114     /* Prefix and length of commands */
 115     char *prefix;
 116     size_t prefixlen;
 117     /* SSL_CTX or SSL structure to perform operations on */
 118     SSL_CTX *ctx;
 119     SSL *ssl;
 120     /* Pointer to SSL or SSL_CTX options field or NULL if none */
 121     unsigned long *poptions;
 122     /* Certificate filenames for each type */
 123     char *cert_filename[SSL_PKEY_NUM];
 124     /* Pointer to SSL or SSL_CTX cert_flags or NULL if none */
 125     unsigned int *pcert_flags;
 126     /* Current flag table being worked on */
 127     const ssl_flag_tbl *tbl;
 128     /* Size of table */
 129     size_t ntbl;
 130 };
 131
 132 static int ssl_match_option(SSL_CONF_CTX *cctx, const ssl_flag_tbl *tbl,
 133                             const char *name, int namelen, int onoff)
 134 {
 135     /* If name not relevant for context skip */
 136     if (!(cctx->flags & tbl->name_flags & SSL_TFLAG_BOTH))
 137         return 0;
 138     if (namelen == -1) {
 139         if (strcmp(tbl->name, name))
 140             return 0;
 141     } else if (tbl->namelen != namelen
 142                || strncasecmp(tbl->name, name, namelen))
 143         return 0;
 144     if (cctx->poptions) {
 145         if (tbl->name_flags & SSL_TFLAG_INV)
 146             onoff ^= 1;
 147         if (tbl->name_flags & SSL_TFLAG_CERT) {
 148             if (onoff)
 149                 *cctx->pcert_flags |= tbl->option_value;
 150             else
 151                 *cctx->pcert_flags &= ~tbl->option_value;
 152         } else {
 153             if (onoff)
 154                 *cctx->poptions |= tbl->option_value;
 155             else
 156                 *cctx->poptions &= ~tbl->option_value;
 157         }
 158     }
 159     return 1;
 160 }
 161
 162 static int ssl_set_option_list(const char *elem, int len, void *usr)
 163 {
 164     SSL_CONF_CTX *cctx = usr;
 165     size_t i;
 166     const ssl_flag_tbl *tbl;
 167     int onoff = 1;
 168     /*
 169      * len == -1 indicates not being called in list context, just for single
 170      * command line switches, so don't allow +, -.
 171      */
 172     if (elem == NULL)
 173         return 0;
 174     if (len != -1) {
 175         if (*elem == '+') {
 176             elem++;
 177             len--;
 178             onoff = 1;
 179         } else if (*elem == '-') {
 180             elem++;
 181             len--;
 182             onoff = 0;
 183         }
 184     }
 185     for (i = 0, tbl = cctx->tbl; i < cctx->ntbl; i++, tbl++) {
 186         if (ssl_match_option(cctx, tbl, elem, len, onoff))
 187             return 1;
 188     }
 189     return 0;
 190 }
 191
 192 /* Single command line switches with no argument e.g. -no_ssl3 */
 193 static int ctrl_str_option(SSL_CONF_CTX *cctx, const char *cmd)
 194 {
 195     /* See apps/apps.h if you change this table. */
 196     static const ssl_flag_tbl ssl_option_single[] = {
 197         SSL_FLAG_TBL("no_ssl3", SSL_OP_NO_SSLv3),
 198         SSL_FLAG_TBL("no_tls1", SSL_OP_NO_TLSv1),
 199         SSL_FLAG_TBL("no_tls1_1", SSL_OP_NO_TLSv1_1),
 200         SSL_FLAG_TBL("no_tls1_2", SSL_OP_NO_TLSv1_2),
 201         SSL_FLAG_TBL("bugs", SSL_OP_ALL),
 202         SSL_FLAG_TBL("no_comp", SSL_OP_NO_COMPRESSION),
 203         SSL_FLAG_TBL_SRV("ecdh_single", SSL_OP_SINGLE_ECDH_USE),
 204 #ifndef OPENSSL_NO_TLSEXT
 205         SSL_FLAG_TBL("no_ticket", SSL_OP_NO_TICKET),
 206 #endif
 207         SSL_FLAG_TBL_SRV("serverpref", SSL_OP_CIPHER_SERVER_PREFERENCE),
 208         SSL_FLAG_TBL("legacy_renegotiation",
 209                      SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION),
 210         SSL_FLAG_TBL_SRV("legacy_server_connect",
 211                          SSL_OP_LEGACY_SERVER_CONNECT),
 212         SSL_FLAG_TBL_SRV("no_resumption_on_reneg",
 213                          SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION),
 214         SSL_FLAG_TBL_SRV_INV("no_legacy_server_connect",
 215                              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",
 219                           SSL_CERT_FLAG_BROKEN_PROTOCOL),
 220 #endif
 221     };
 222     cctx->tbl = ssl_option_single;
 223     cctx->ntbl = OSSL_NELEM(ssl_option_single);
 224     return ssl_set_option_list(cmd, -1, cctx);
 225 }
 226
 227 /* Set supported signature algorithms */
 228 static int cmd_SignatureAlgorithms(SSL_CONF_CTX *cctx, const char *value)
 229 {
 230     int rv;
 231     if (cctx->ssl)
 232         rv = SSL_set1_sigalgs_list(cctx->ssl, value);
 233     /* NB: ctx == NULL performs syntax checking only */
 234     else
 235         rv = SSL_CTX_set1_sigalgs_list(cctx->ctx, value);
 236     return rv > 0;
 237 }
 238
 239 /* Set supported client signature algorithms */
 240 static int cmd_ClientSignatureAlgorithms(SSL_CONF_CTX *cctx,
 241                                          const char *value)
 242 {
 243     int rv;
 244     if (cctx->ssl)
 245         rv = SSL_set1_client_sigalgs_list(cctx->ssl, value);
 246     /* NB: ctx == NULL performs syntax checking only */
 247     else
 248         rv = SSL_CTX_set1_client_sigalgs_list(cctx->ctx, value);
 249     return rv > 0;
 250 }
 251
 252 static int cmd_Curves(SSL_CONF_CTX *cctx, const char *value)
 253 {
 254     int rv;
 255     if (cctx->ssl)
 256         rv = SSL_set1_curves_list(cctx->ssl, value);
 257     /* NB: ctx == NULL performs syntax checking only */
 258     else
 259         rv = SSL_CTX_set1_curves_list(cctx->ctx, value);
 260     return rv > 0;
 261 }
 262
 263 #ifndef OPENSSL_NO_EC
 264 /* ECDH temporary parameters */
 265 static int cmd_ECDHParameters(SSL_CONF_CTX *cctx, const char *value)
 266 {
 267     int onoff = -1, rv = 1;
 268     if (!(cctx->flags & SSL_CONF_FLAG_SERVER))
 269         return -2;
 270     if (cctx->flags & SSL_CONF_FLAG_FILE) {
 271         if (*value == '+') {
 272             onoff = 1;
 273             value++;
 274         }
 275         if (*value == '-') {
 276             onoff = 0;
 277             value++;
 278         }
 279         if (!strcasecmp(value, "automatic")) {
 280             if (onoff == -1)
 281                 onoff = 1;
 282         } else if (onoff != -1)
 283             return 0;
 284     } else if (cctx->flags & SSL_CONF_FLAG_CMDLINE) {
 285         if (!strcmp(value, "auto"))
 286             onoff = 1;
 287     }
 288
 289     if (onoff != -1) {
 290         if (cctx->ctx)
 291             rv = SSL_CTX_set_ecdh_auto(cctx->ctx, onoff);
 292         else if (cctx->ssl)
 293             rv = SSL_set_ecdh_auto(cctx->ssl, onoff);
 294     } else {
 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 #endif
 315 static int cmd_CipherString(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 > 0;
 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         SSL_FLAG_TBL_INV("ALL", SSL_OP_NO_SSL_MASK),
 329         SSL_FLAG_TBL_INV("SSLv2", SSL_OP_NO_SSLv2),
 330         SSL_FLAG_TBL_INV("SSLv3", SSL_OP_NO_SSLv3),
 331         SSL_FLAG_TBL_INV("TLSv1", SSL_OP_NO_TLSv1),
 332         SSL_FLAG_TBL_INV("TLSv1.1", SSL_OP_NO_TLSv1_1),
 333         SSL_FLAG_TBL_INV("TLSv1.2", SSL_OP_NO_TLSv1_2)
 334     };
 335     if (!(cctx->flags & SSL_CONF_FLAG_FILE))
 336         return -2;
 337     cctx->tbl = ssl_protocol_list;
 338     cctx->ntbl = OSSL_NELEM(ssl_protocol_list);
 339     return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
 340 }
 341
 342 static int cmd_Options(SSL_CONF_CTX *cctx, const char *value)
 343 {
 344     static const ssl_flag_tbl ssl_option_list[] = {
 345         SSL_FLAG_TBL_INV("SessionTicket", SSL_OP_NO_TICKET),
 346         SSL_FLAG_TBL_INV("EmptyFragments",
 347                          SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS),
 348         SSL_FLAG_TBL("Bugs", SSL_OP_ALL),
 349         SSL_FLAG_TBL_INV("Compression", SSL_OP_NO_COMPRESSION),
 350         SSL_FLAG_TBL_SRV("ServerPreference", SSL_OP_CIPHER_SERVER_PREFERENCE),
 351         SSL_FLAG_TBL_SRV("NoResumptionOnRenegotiation",
 352                          SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION),
 353         SSL_FLAG_TBL_SRV("DHSingle", SSL_OP_SINGLE_DH_USE),
 354         SSL_FLAG_TBL_SRV("ECDHSingle", SSL_OP_SINGLE_ECDH_USE),
 355         SSL_FLAG_TBL("UnsafeLegacyRenegotiation",
 356                      SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION),
 357     };
 358     if (!(cctx->flags & SSL_CONF_FLAG_FILE))
 359         return -2;
 360     if (value == NULL)
 361         return -3;
 362     cctx->tbl = ssl_option_list;
 363     cctx->ntbl = OSSL_NELEM(ssl_option_list);
 364     return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
 365 }
 366
 367 static int cmd_Certificate(SSL_CONF_CTX *cctx, const char *value)
 368 {
 369     int rv = 1;
 370     CERT *c = NULL;
 371     if (!(cctx->flags & SSL_CONF_FLAG_CERTIFICATE))
 372         return -2;
 373     if (cctx->ctx) {
 374         rv = SSL_CTX_use_certificate_chain_file(cctx->ctx, value);
 375         c = cctx->ctx->cert;
 376     }
 377     if (cctx->ssl) {
 378         rv = SSL_use_certificate_file(cctx->ssl, value, SSL_FILETYPE_PEM);
 379         c = cctx->ssl->cert;
 380     }
 381     if (rv > 0 && c && cctx->flags & SSL_CONF_FLAG_REQUIRE_PRIVATE) {
 382         char **pfilename = &cctx->cert_filename[c->key - c->pkeys];
 383         OPENSSL_free(*pfilename);
 384         *pfilename = BUF_strdup(value);
 385         if (!*pfilename)
 386             rv = 0;
 387     }
 388
 389     return rv > 0;
 390 }
 391
 392 static int cmd_PrivateKey(SSL_CONF_CTX *cctx, const char *value)
 393 {
 394     int rv = 1;
 395     if (!(cctx->flags & SSL_CONF_FLAG_CERTIFICATE))
 396         return -2;
 397     if (cctx->ctx)
 398         rv = SSL_CTX_use_PrivateKey_file(cctx->ctx, value, SSL_FILETYPE_PEM);
 399     if (cctx->ssl)
 400         rv = SSL_use_PrivateKey_file(cctx->ssl, value, SSL_FILETYPE_PEM);
 401     return rv > 0;
 402 }
 403
 404 static int cmd_ServerInfoFile(SSL_CONF_CTX *cctx, const char *value)
 405 {
 406     int rv = 1;
 407     if (!(cctx->flags & SSL_CONF_FLAG_CERTIFICATE))
 408         return -2;
 409     if (!(cctx->flags & SSL_CONF_FLAG_SERVER))
 410         return -2;
 411     if (cctx->ctx)
 412         rv = SSL_CTX_use_serverinfo_file(cctx->ctx, value);
 413     return rv > 0;
 414 }
 415
 416 #ifndef OPENSSL_NO_DH
 417 static int cmd_DHParameters(SSL_CONF_CTX *cctx, const char *value)
 418 {
 419     int rv = 0;
 420     DH *dh = NULL;
 421     BIO *in = NULL;
 422     if (!(cctx->flags & SSL_CONF_FLAG_CERTIFICATE))
 423         return -2;
 424     if (cctx->ctx || cctx->ssl) {
 425         in = BIO_new(BIO_s_file_internal());
 426         if (!in)
 427             goto end;
 428         if (BIO_read_filename(in, value) <= 0)
 429             goto end;
 430         dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
 431         if (!dh)
 432             goto end;
 433     } else
 434         return 1;
 435     if (cctx->ctx)
 436         rv = SSL_CTX_set_tmp_dh(cctx->ctx, dh);
 437     if (cctx->ssl)
 438         rv = SSL_set_tmp_dh(cctx->ssl, dh);
 439  end:
 440     DH_free(dh);
 441     BIO_free(in);
 442     return rv > 0;
 443 }
 444 #endif
 445 typedef struct {
 446     int (*cmd) (SSL_CONF_CTX *cctx, const char *value);
 447     const char *str_file;
 448     const char *str_cmdline;
 449     unsigned int value_type;
 450 } ssl_conf_cmd_tbl;
 451
 452 /* Table of supported parameters */
 453
 454 #define SSL_CONF_CMD(name, cmdopt, type) \
 455         {cmd_##name, #name, cmdopt, type}
 456
 457 #define SSL_CONF_CMD_STRING(name, cmdopt) \
 458         SSL_CONF_CMD(name, cmdopt, SSL_CONF_TYPE_STRING)
 459
 460 /* See apps/apps.h if you change this table. */
 461 static const ssl_conf_cmd_tbl ssl_conf_cmds[] = {
 462     SSL_CONF_CMD_STRING(SignatureAlgorithms, "sigalgs"),
 463     SSL_CONF_CMD_STRING(ClientSignatureAlgorithms, "client_sigalgs"),
 464     SSL_CONF_CMD_STRING(Curves, "curves"),
 465 #ifndef OPENSSL_NO_EC
 466     SSL_CONF_CMD_STRING(ECDHParameters, "named_curve"),
 467 #endif
 468     SSL_CONF_CMD_STRING(CipherString, "cipher"),
 469     SSL_CONF_CMD_STRING(Protocol, NULL),
 470     SSL_CONF_CMD_STRING(Options, NULL),
 471     SSL_CONF_CMD(Certificate, "cert", SSL_CONF_TYPE_FILE),
 472     SSL_CONF_CMD(PrivateKey, "key", SSL_CONF_TYPE_FILE),
 473     SSL_CONF_CMD(ServerInfoFile, NULL, SSL_CONF_TYPE_FILE),
 474 #ifndef OPENSSL_NO_DH
 475     SSL_CONF_CMD(DHParameters, "dhparam", SSL_CONF_TYPE_FILE)
 476 #endif
 477 };
 478
 479 static int ssl_conf_cmd_skip_prefix(SSL_CONF_CTX *cctx, const char **pcmd)
 480 {
 481     if (!pcmd || !*pcmd)
 482         return 0;
 483     /* If a prefix is set, check and skip */
 484     if (cctx->prefix) {
 485         if (strlen(*pcmd) <= cctx->prefixlen)
 486             return 0;
 487         if (cctx->flags & SSL_CONF_FLAG_CMDLINE &&
 488             strncmp(*pcmd, cctx->prefix, cctx->prefixlen))
 489             return 0;
 490         if (cctx->flags & SSL_CONF_FLAG_FILE &&
 491             strncasecmp(*pcmd, cctx->prefix, cctx->prefixlen))
 492             return 0;
 493         *pcmd += cctx->prefixlen;
 494     } else if (cctx->flags & SSL_CONF_FLAG_CMDLINE) {
 495         if (**pcmd != '-' || !(*pcmd)[1])
 496             return 0;
 497         *pcmd += 1;
 498     }
 499     return 1;
 500 }
 501
 502 static const ssl_conf_cmd_tbl *ssl_conf_cmd_lookup(SSL_CONF_CTX *cctx,
 503                                                    const char *cmd)
 504 {
 505     const ssl_conf_cmd_tbl *t;
 506     size_t i;
 507     if (cmd == NULL)
 508         return NULL;
 509
 510     /* Look for matching parameter name in table */
 511     for (i = 0, t = ssl_conf_cmds; i < OSSL_NELEM(ssl_conf_cmds); i++, t++) {
 512         if (cctx->flags & SSL_CONF_FLAG_CMDLINE) {
 513             if (t->str_cmdline && !strcmp(t->str_cmdline, cmd))
 514                 return t;
 515         }
 516         if (cctx->flags & SSL_CONF_FLAG_FILE) {
 517             if (t->str_file && !strcasecmp(t->str_file, cmd))
 518                 return t;
 519         }
 520     }
 521     return NULL;
 522 }
 523
 524 int SSL_CONF_cmd(SSL_CONF_CTX *cctx, const char *cmd, const char *value)
 525 {
 526     const ssl_conf_cmd_tbl *runcmd;
 527     if (cmd == NULL) {
 528         SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_INVALID_NULL_CMD_NAME);
 529         return 0;
 530     }
 531
 532     if (!ssl_conf_cmd_skip_prefix(cctx, &cmd))
 533         return -2;
 534
 535     runcmd = ssl_conf_cmd_lookup(cctx, cmd);
 536
 537     if (runcmd) {
 538         int rv;
 539         if (value == NULL)
 540             return -3;
 541         rv = runcmd->cmd(cctx, value);
 542         if (rv > 0)
 543             return 2;
 544         if (rv == -2)
 545             return -2;
 546         if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS) {
 547             SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_BAD_VALUE);
 548             ERR_add_error_data(4, "cmd=", cmd, ", value=", value);
 549         }
 550         return 0;
 551     }
 552
 553     if (cctx->flags & SSL_CONF_FLAG_CMDLINE) {
 554         if (ctrl_str_option(cctx, cmd))
 555             return 1;
 556     }
 557
 558     if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS) {
 559         SSLerr(SSL_F_SSL_CONF_CMD, SSL_R_UNKNOWN_CMD_NAME);
 560         ERR_add_error_data(2, "cmd=", cmd);
 561     }
 562
 563     return -2;
 564 }
 565
 566 int SSL_CONF_cmd_argv(SSL_CONF_CTX *cctx, int *pargc, char ***pargv)
 567 {
 568     int rv;
 569     const char *arg = NULL, *argn;
 570     if (pargc && *pargc == 0)
 571         return 0;
 572     if (!pargc || *pargc > 0)
 573         arg = **pargv;
 574     if (arg == NULL)
 575         return 0;
 576     if (!pargc || *pargc > 1)
 577         argn = (*pargv)[1];
 578     else
 579         argn = NULL;
 580     cctx->flags &= ~SSL_CONF_FLAG_FILE;
 581     cctx->flags |= SSL_CONF_FLAG_CMDLINE;
 582     rv = SSL_CONF_cmd(cctx, arg, argn);
 583     if (rv > 0) {
 584         /* Success: update pargc, pargv */
 585         (*pargv) += rv;
 586         if (pargc)
 587             (*pargc) -= rv;
 588         return rv;
 589     }
 590     /* Unknown switch: indicate no arguments processed */
 591     if (rv == -2)
 592         return 0;
 593     /* Some error occurred processing command, return fatal error */
 594     if (rv == 0)
 595         return -1;
 596     return rv;
 597 }
 598
 599 int SSL_CONF_cmd_value_type(SSL_CONF_CTX *cctx, const char *cmd)
 600 {
 601     if (ssl_conf_cmd_skip_prefix(cctx, &cmd)) {
 602         const ssl_conf_cmd_tbl *runcmd;
 603         runcmd = ssl_conf_cmd_lookup(cctx, cmd);
 604         if (runcmd)
 605             return runcmd->value_type;
 606     }
 607     return SSL_CONF_TYPE_UNKNOWN;
 608 }
 609
 610 SSL_CONF_CTX *SSL_CONF_CTX_new(void)
 611 {
 612     SSL_CONF_CTX *ret = OPENSSL_malloc(sizeof(*ret));
 613     size_t i;
 614
 615     if (ret) {
 616         ret->flags = 0;
 617         ret->prefix = NULL;
 618         ret->prefixlen = 0;
 619         ret->ssl = NULL;
 620         ret->ctx = NULL;
 621         ret->poptions = NULL;
 622         ret->pcert_flags = NULL;
 623         ret->tbl = NULL;
 624         ret->ntbl = 0;
 625         for (i = 0; i < SSL_PKEY_NUM; i++)
 626             ret->cert_filename[i] = NULL;
 627     }
 628     return ret;
 629 }
 630
 631 int SSL_CONF_CTX_finish(SSL_CONF_CTX *cctx)
 632 {
 633     /* See if any certificates are missing private keys */
 634     size_t i;
 635     CERT *c = NULL;
 636     if (cctx->ctx)
 637         c = cctx->ctx->cert;
 638     else if (cctx->ssl)
 639         c = cctx->ssl->cert;
 640     if (c && cctx->flags & SSL_CONF_FLAG_REQUIRE_PRIVATE) {
 641         for (i = 0; i < SSL_PKEY_NUM; i++) {
 642             const char *p = cctx->cert_filename[i];
 643             /*
 644              * If missing private key try to load one from certificate file
 645              */
 646             if (p && !c->pkeys[i].privatekey) {
 647                 if (!cmd_PrivateKey(cctx, p))
 648                     return 0;
 649             }
 650         }
 651     }
 652     return 1;
 653 }
 654
 655 void SSL_CONF_CTX_free(SSL_CONF_CTX *cctx)
 656 {
 657     if (cctx) {
 658         size_t i;
 659         for (i = 0; i < SSL_PKEY_NUM; i++) {
 660             OPENSSL_free(cctx->cert_filename[i]);
 661         }
 662         OPENSSL_free(cctx->prefix);
 663         OPENSSL_free(cctx);
 664     }
 665 }
 666
 667 unsigned int SSL_CONF_CTX_set_flags(SSL_CONF_CTX *cctx, unsigned int flags)
 668 {
 669     cctx->flags |= flags;
 670     return cctx->flags;
 671 }
 672
 673 unsigned int SSL_CONF_CTX_clear_flags(SSL_CONF_CTX *cctx, unsigned int flags)
 674 {
 675     cctx->flags &= ~flags;
 676     return cctx->flags;
 677 }
 678
 679 int SSL_CONF_CTX_set1_prefix(SSL_CONF_CTX *cctx, const char *pre)
 680 {
 681     char *tmp = NULL;
 682     if (pre) {
 683         tmp = BUF_strdup(pre);
 684         if (tmp == NULL)
 685             return 0;
 686     }
 687     OPENSSL_free(cctx->prefix);
 688     cctx->prefix = tmp;
 689     if (tmp)
 690         cctx->prefixlen = strlen(tmp);
 691     else
 692         cctx->prefixlen = 0;
 693     return 1;
 694 }
 695
 696 void SSL_CONF_CTX_set_ssl(SSL_CONF_CTX *cctx, SSL *ssl)
 697 {
 698     cctx->ssl = ssl;
 699     cctx->ctx = NULL;
 700     if (ssl) {
 701         cctx->poptions = &ssl->options;
 702         cctx->pcert_flags = &ssl->cert->cert_flags;
 703     } else {
 704         cctx->poptions = NULL;
 705         cctx->pcert_flags = NULL;
 706     }
 707 }
 708
 709 void SSL_CONF_CTX_set_ssl_ctx(SSL_CONF_CTX *cctx, SSL_CTX *ctx)
 710 {
 711     cctx->ctx = ctx;
 712     cctx->ssl = NULL;
 713     if (ctx) {
 714         cctx->poptions = &ctx->options;
 715         cctx->pcert_flags = &ctx->cert->cert_flags;
 716     } else {
 717         cctx->poptions = NULL;
 718         cctx->pcert_flags = NULL;
 719     }
 720 }