ssl/ssl_conf.c

   1 /*
   2  * Copyright 2012-2022 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "ssl_local.h"
  12 #include <openssl/conf.h>
  13 #include <openssl/objects.h>
  14 #include <openssl/decoder.h>
  15 #include <openssl/core_dispatch.h>
  16 #include "internal/nelem.h"
  17
  18 /*
  19  * structure holding name tables. This is used for permitted elements in lists
  20  * such as TLSv1.
  21  */
  22
  23 typedef struct {
  24     const char *name;
  25     int namelen;
  26     unsigned int name_flags;
  27     uint64_t option_value;
  28 } ssl_flag_tbl;
  29
  30 /* Switch table: use for single command line switches like no_tls2 */
  31 typedef struct {
  32     uint64_t option_value;
  33     unsigned int name_flags;
  34 } ssl_switch_tbl;
  35
  36 /* Sense of name is inverted e.g. "TLSv1" will clear SSL_OP_NO_TLSv1 */
  37 #define SSL_TFLAG_INV   0x1
  38 /* Mask for type of flag referred to */
  39 #define SSL_TFLAG_TYPE_MASK 0xf00
  40 /* Flag is for options */
  41 #define SSL_TFLAG_OPTION    0x000
  42 /* Flag is for cert_flags */
  43 #define SSL_TFLAG_CERT      0x100
  44 /* Flag is for verify mode */
  45 #define SSL_TFLAG_VFY       0x200
  46 /* Option can only be used for clients */
  47 #define SSL_TFLAG_CLIENT SSL_CONF_FLAG_CLIENT
  48 /* Option can only be used for servers */
  49 #define SSL_TFLAG_SERVER SSL_CONF_FLAG_SERVER
  50 #define SSL_TFLAG_BOTH (SSL_TFLAG_CLIENT|SSL_TFLAG_SERVER)
  51
  52 #define SSL_FLAG_TBL(str, flag) \
  53         {str, (int)(sizeof(str) - 1), SSL_TFLAG_BOTH, flag}
  54 #define SSL_FLAG_TBL_SRV(str, flag) \
  55         {str, (int)(sizeof(str) - 1), SSL_TFLAG_SERVER, flag}
  56 #define SSL_FLAG_TBL_CLI(str, flag) \
  57         {str, (int)(sizeof(str) - 1), SSL_TFLAG_CLIENT, flag}
  58 #define SSL_FLAG_TBL_INV(str, flag) \
  59         {str, (int)(sizeof(str) - 1), SSL_TFLAG_INV|SSL_TFLAG_BOTH, flag}
  60 #define SSL_FLAG_TBL_SRV_INV(str, flag) \
  61         {str, (int)(sizeof(str) - 1), SSL_TFLAG_INV|SSL_TFLAG_SERVER, flag}
  62 #define SSL_FLAG_TBL_CERT(str, flag) \
  63         {str, (int)(sizeof(str) - 1), SSL_TFLAG_CERT|SSL_TFLAG_BOTH, flag}
  64
  65 #define SSL_FLAG_VFY_CLI(str, flag) \
  66         {str, (int)(sizeof(str) - 1), SSL_TFLAG_VFY | SSL_TFLAG_CLIENT, flag}
  67 #define SSL_FLAG_VFY_SRV(str, flag) \
  68         {str, (int)(sizeof(str) - 1), SSL_TFLAG_VFY | SSL_TFLAG_SERVER, flag}
  69
  70 /*
  71  * Opaque structure containing SSL configuration context.
  72  */
  73
  74 struct ssl_conf_ctx_st {
  75     /*
  76      * Various flags indicating (among other things) which options we will
  77      * recognise.
  78      */
  79     unsigned int flags;
  80     /* Prefix and length of commands */
  81     char *prefix;
  82     size_t prefixlen;
  83     /* SSL_CTX or SSL structure to perform operations on */
  84     SSL_CTX *ctx;
  85     SSL *ssl;
  86     /* Pointer to SSL or SSL_CTX options field or NULL if none */
  87     uint64_t *poptions;
  88     /* Certificate filenames for each type */
  89     char *cert_filename[SSL_PKEY_NUM];
  90     /* Pointer to SSL or SSL_CTX cert_flags or NULL if none */
  91     uint32_t *pcert_flags;
  92     /* Pointer to SSL or SSL_CTX verify_mode or NULL if none */
  93     uint32_t *pvfy_flags;
  94     /* Pointer to SSL or SSL_CTX min_version field or NULL if none */
  95     int *min_version;
  96     /* Pointer to SSL or SSL_CTX max_version field or NULL if none */
  97     int *max_version;
  98     /* Current flag table being worked on */
  99     const ssl_flag_tbl *tbl;
 100     /* Size of table */
 101     size_t ntbl;
 102     /* Client CA names */
 103     STACK_OF(X509_NAME) *canames;
 104 };
 105
 106 static void ssl_set_option(SSL_CONF_CTX *cctx, unsigned int name_flags,
 107                            uint64_t option_value, int onoff)
 108 {
 109     uint32_t *pflags;
 110
 111     if (cctx->poptions == NULL)
 112         return;
 113     if (name_flags & SSL_TFLAG_INV)
 114         onoff ^= 1;
 115     switch (name_flags & SSL_TFLAG_TYPE_MASK) {
 116
 117     case SSL_TFLAG_CERT:
 118         pflags = cctx->pcert_flags;
 119         break;
 120
 121     case SSL_TFLAG_VFY:
 122         pflags = cctx->pvfy_flags;
 123         break;
 124
 125     case SSL_TFLAG_OPTION:
 126         if (onoff)
 127             *cctx->poptions |= option_value;
 128         else
 129             *cctx->poptions &= ~option_value;
 130         return;
 131
 132     default:
 133         return;
 134
 135     }
 136     if (onoff)
 137         *pflags |= option_value;
 138     else
 139         *pflags &= ~option_value;
 140 }
 141
 142 static int ssl_match_option(SSL_CONF_CTX *cctx, const ssl_flag_tbl *tbl,
 143                             const char *name, int namelen, int onoff)
 144 {
 145     /* If name not relevant for context skip */
 146     if (!(cctx->flags & tbl->name_flags & SSL_TFLAG_BOTH))
 147         return 0;
 148     if (namelen == -1) {
 149         if (strcmp(tbl->name, name))
 150             return 0;
 151     } else if (tbl->namelen != namelen
 152                || OPENSSL_strncasecmp(tbl->name, name, namelen))
 153         return 0;
 154     ssl_set_option(cctx, tbl->name_flags, tbl->option_value, onoff);
 155     return 1;
 156 }
 157
 158 static int ssl_set_option_list(const char *elem, int len, void *usr)
 159 {
 160     SSL_CONF_CTX *cctx = usr;
 161     size_t i;
 162     const ssl_flag_tbl *tbl;
 163     int onoff = 1;
 164     /*
 165      * len == -1 indicates not being called in list context, just for single
 166      * command line switches, so don't allow +, -.
 167      */
 168     if (elem == NULL)
 169         return 0;
 170     if (len != -1) {
 171         if (*elem == '+') {
 172             elem++;
 173             len--;
 174             onoff = 1;
 175         } else if (*elem == '-') {
 176             elem++;
 177             len--;
 178             onoff = 0;
 179         }
 180     }
 181     for (i = 0, tbl = cctx->tbl; i < cctx->ntbl; i++, tbl++) {
 182         if (ssl_match_option(cctx, tbl, elem, len, onoff))
 183             return 1;
 184     }
 185     return 0;
 186 }
 187
 188 /* Set supported signature algorithms */
 189 static int cmd_SignatureAlgorithms(SSL_CONF_CTX *cctx, const char *value)
 190 {
 191     int rv;
 192     if (cctx->ssl)
 193         rv = SSL_set1_sigalgs_list(cctx->ssl, value);
 194     /* NB: ctx == NULL performs syntax checking only */
 195     else
 196         rv = SSL_CTX_set1_sigalgs_list(cctx->ctx, value);
 197     return rv > 0;
 198 }
 199
 200 /* Set supported client signature algorithms */
 201 static int cmd_ClientSignatureAlgorithms(SSL_CONF_CTX *cctx, const char *value)
 202 {
 203     int rv;
 204     if (cctx->ssl)
 205         rv = SSL_set1_client_sigalgs_list(cctx->ssl, value);
 206     /* NB: ctx == NULL performs syntax checking only */
 207     else
 208         rv = SSL_CTX_set1_client_sigalgs_list(cctx->ctx, value);
 209     return rv > 0;
 210 }
 211
 212 static int cmd_Groups(SSL_CONF_CTX *cctx, const char *value)
 213 {
 214     int rv;
 215     if (cctx->ssl)
 216         rv = SSL_set1_groups_list(cctx->ssl, value);
 217     /* NB: ctx == NULL performs syntax checking only */
 218     else
 219         rv = SSL_CTX_set1_groups_list(cctx->ctx, value);
 220     return rv > 0;
 221 }
 222
 223 /* This is the old name for cmd_Groups - retained for backwards compatibility */
 224 static int cmd_Curves(SSL_CONF_CTX *cctx, const char *value)
 225 {
 226     return cmd_Groups(cctx, value);
 227 }
 228
 229 /* ECDH temporary parameters */
 230 static int cmd_ECDHParameters(SSL_CONF_CTX *cctx, const char *value)
 231 {
 232     int rv = 1;
 233
 234     /* Ignore values supported by 1.0.2 for the automatic selection */
 235     if ((cctx->flags & SSL_CONF_FLAG_FILE)
 236             && (OPENSSL_strcasecmp(value, "+automatic") == 0
 237                 || OPENSSL_strcasecmp(value, "automatic") == 0))
 238         return 1;
 239     if ((cctx->flags & SSL_CONF_FLAG_CMDLINE) &&
 240         strcmp(value, "auto") == 0)
 241         return 1;
 242
 243     /* ECDHParameters accepts a single group name */
 244     if (strstr(value, ":") != NULL)
 245         return 0;
 246
 247     if (cctx->ctx)
 248         rv = SSL_CTX_set1_groups_list(cctx->ctx, value);
 249     else if (cctx->ssl)
 250         rv = SSL_set1_groups_list(cctx->ssl, value);
 251
 252     return rv > 0;
 253 }
 254
 255 static int cmd_CipherString(SSL_CONF_CTX *cctx, const char *value)
 256 {
 257     int rv = 1;
 258
 259     if (cctx->ctx)
 260         rv = SSL_CTX_set_cipher_list(cctx->ctx, value);
 261     if (cctx->ssl)
 262         rv = SSL_set_cipher_list(cctx->ssl, value);
 263     return rv > 0;
 264 }
 265
 266 static int cmd_Ciphersuites(SSL_CONF_CTX *cctx, const char *value)
 267 {
 268     int rv = 1;
 269
 270     if (cctx->ctx)
 271         rv = SSL_CTX_set_ciphersuites(cctx->ctx, value);
 272     if (cctx->ssl)
 273         rv = SSL_set_ciphersuites(cctx->ssl, value);
 274     return rv > 0;
 275 }
 276
 277 static int cmd_Protocol(SSL_CONF_CTX *cctx, const char *value)
 278 {
 279     static const ssl_flag_tbl ssl_protocol_list[] = {
 280         SSL_FLAG_TBL_INV("ALL", SSL_OP_NO_SSL_MASK),
 281         SSL_FLAG_TBL_INV("SSLv2", SSL_OP_NO_SSLv2),
 282         SSL_FLAG_TBL_INV("SSLv3", SSL_OP_NO_SSLv3),
 283         SSL_FLAG_TBL_INV("TLSv1", SSL_OP_NO_TLSv1),
 284         SSL_FLAG_TBL_INV("TLSv1.1", SSL_OP_NO_TLSv1_1),
 285         SSL_FLAG_TBL_INV("TLSv1.2", SSL_OP_NO_TLSv1_2),
 286         SSL_FLAG_TBL_INV("TLSv1.3", SSL_OP_NO_TLSv1_3),
 287         SSL_FLAG_TBL_INV("DTLSv1", SSL_OP_NO_DTLSv1),
 288         SSL_FLAG_TBL_INV("DTLSv1.2", SSL_OP_NO_DTLSv1_2)
 289     };
 290     cctx->tbl = ssl_protocol_list;
 291     cctx->ntbl = OSSL_NELEM(ssl_protocol_list);
 292     return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
 293 }
 294
 295 /*
 296  * protocol_from_string - converts a protocol version string to a number
 297  *
 298  * Returns -1 on failure or the version on success
 299  */
 300 static int protocol_from_string(const char *value)
 301 {
 302     struct protocol_versions {
 303         const char *name;
 304         int version;
 305     };
 306     /*
 307      * Note: To avoid breaking previously valid configurations, we must retain
 308      * legacy entries in this table even if the underlying protocol is no
 309      * longer supported.  This also means that the constants SSL3_VERSION, ...
 310      * need to be retained indefinitely.  This table can only grow, never
 311      * shrink.
 312      */
 313     static const struct protocol_versions versions[] = {
 314         {"None", 0},
 315         {"SSLv3", SSL3_VERSION},
 316         {"TLSv1", TLS1_VERSION},
 317         {"TLSv1.1", TLS1_1_VERSION},
 318         {"TLSv1.2", TLS1_2_VERSION},
 319         {"TLSv1.3", TLS1_3_VERSION},
 320         {"DTLSv1", DTLS1_VERSION},
 321         {"DTLSv1.2", DTLS1_2_VERSION}
 322     };
 323     size_t i;
 324     size_t n = OSSL_NELEM(versions);
 325
 326     for (i = 0; i < n; i++)
 327         if (strcmp(versions[i].name, value) == 0)
 328             return versions[i].version;
 329     return -1;
 330 }
 331
 332 static int min_max_proto(SSL_CONF_CTX *cctx, const char *value, int *bound)
 333 {
 334     int method_version;
 335     int new_version;
 336
 337     if (cctx->ctx != NULL)
 338         method_version = cctx->ctx->method->version;
 339     else if (cctx->ssl != NULL)
 340         method_version = cctx->ssl->defltmeth->version;
 341     else
 342         return 0;
 343     if ((new_version = protocol_from_string(value)) < 0)
 344         return 0;
 345     return ssl_set_version_bound(method_version, new_version, bound);
 346 }
 347
 348 /*
 349  * cmd_MinProtocol - Set min protocol version
 350  * @cctx: config structure to save settings in
 351  * @value: The min protocol version in string form
 352  *
 353  * Returns 1 on success and 0 on failure.
 354  */
 355 static int cmd_MinProtocol(SSL_CONF_CTX *cctx, const char *value)
 356 {
 357     return min_max_proto(cctx, value, cctx->min_version);
 358 }
 359
 360 /*
 361  * cmd_MaxProtocol - Set max protocol version
 362  * @cctx: config structure to save settings in
 363  * @value: The max protocol version in string form
 364  *
 365  * Returns 1 on success and 0 on failure.
 366  */
 367 static int cmd_MaxProtocol(SSL_CONF_CTX *cctx, const char *value)
 368 {
 369     return min_max_proto(cctx, value, cctx->max_version);
 370 }
 371
 372 static int cmd_Options(SSL_CONF_CTX *cctx, const char *value)
 373 {
 374     static const ssl_flag_tbl ssl_option_list[] = {
 375         SSL_FLAG_TBL_INV("SessionTicket", SSL_OP_NO_TICKET),
 376         SSL_FLAG_TBL_INV("EmptyFragments",
 377                          SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS),
 378         SSL_FLAG_TBL("Bugs", SSL_OP_ALL),
 379         SSL_FLAG_TBL_INV("Compression", SSL_OP_NO_COMPRESSION),
 380         SSL_FLAG_TBL_SRV("ServerPreference", SSL_OP_CIPHER_SERVER_PREFERENCE),
 381         SSL_FLAG_TBL_SRV("NoResumptionOnRenegotiation",
 382                          SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION),
 383         SSL_FLAG_TBL_SRV("DHSingle", SSL_OP_SINGLE_DH_USE),
 384         SSL_FLAG_TBL_SRV("ECDHSingle", SSL_OP_SINGLE_ECDH_USE),
 385         SSL_FLAG_TBL("UnsafeLegacyRenegotiation",
 386                      SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION),
 387         SSL_FLAG_TBL("UnsafeLegacyServerConnect",
 388                      SSL_OP_LEGACY_SERVER_CONNECT),
 389         SSL_FLAG_TBL("ClientRenegotiation",
 390                      SSL_OP_ALLOW_CLIENT_RENEGOTIATION),
 391         SSL_FLAG_TBL_INV("EncryptThenMac", SSL_OP_NO_ENCRYPT_THEN_MAC),
 392         SSL_FLAG_TBL("NoRenegotiation", SSL_OP_NO_RENEGOTIATION),
 393         SSL_FLAG_TBL("AllowNoDHEKEX", SSL_OP_ALLOW_NO_DHE_KEX),
 394         SSL_FLAG_TBL("PrioritizeChaCha", SSL_OP_PRIORITIZE_CHACHA),
 395         SSL_FLAG_TBL("MiddleboxCompat", SSL_OP_ENABLE_MIDDLEBOX_COMPAT),
 396         SSL_FLAG_TBL_INV("AntiReplay", SSL_OP_NO_ANTI_REPLAY),
 397         SSL_FLAG_TBL_INV("ExtendedMasterSecret", SSL_OP_NO_EXTENDED_MASTER_SECRET),
 398         SSL_FLAG_TBL_INV("CANames", SSL_OP_DISABLE_TLSEXT_CA_NAMES),
 399         SSL_FLAG_TBL("KTLS", SSL_OP_ENABLE_KTLS),
 400         SSL_FLAG_TBL_CERT("StrictCertCheck", SSL_CERT_FLAG_TLS_STRICT),
 401         SSL_FLAG_TBL_INV("TxCertificateCompression", SSL_OP_NO_TX_CERTIFICATE_COMPRESSION),
 402         SSL_FLAG_TBL_INV("RxCertificateCompression", SSL_OP_NO_RX_CERTIFICATE_COMPRESSION),
 403         SSL_FLAG_TBL("KTLSTxZerocopySendfile", SSL_OP_ENABLE_KTLS_TX_ZEROCOPY_SENDFILE),
 404         SSL_FLAG_TBL("IgnoreUnexpectedEOF", SSL_OP_IGNORE_UNEXPECTED_EOF),
 405     };
 406     if (value == NULL)
 407         return -3;
 408     cctx->tbl = ssl_option_list;
 409     cctx->ntbl = OSSL_NELEM(ssl_option_list);
 410     return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
 411 }
 412
 413 static int cmd_VerifyMode(SSL_CONF_CTX *cctx, const char *value)
 414 {
 415     static const ssl_flag_tbl ssl_vfy_list[] = {
 416         SSL_FLAG_VFY_CLI("Peer", SSL_VERIFY_PEER),
 417         SSL_FLAG_VFY_SRV("Request", SSL_VERIFY_PEER),
 418         SSL_FLAG_VFY_SRV("Require",
 419                          SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT),
 420         SSL_FLAG_VFY_SRV("Once", SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE),
 421         SSL_FLAG_VFY_SRV("RequestPostHandshake",
 422                          SSL_VERIFY_PEER | SSL_VERIFY_POST_HANDSHAKE),
 423         SSL_FLAG_VFY_SRV("RequirePostHandshake",
 424                          SSL_VERIFY_PEER | SSL_VERIFY_POST_HANDSHAKE |
 425                          SSL_VERIFY_FAIL_IF_NO_PEER_CERT),
 426     };
 427     if (value == NULL)
 428         return -3;
 429     cctx->tbl = ssl_vfy_list;
 430     cctx->ntbl = OSSL_NELEM(ssl_vfy_list);
 431     return CONF_parse_list(value, ',', 1, ssl_set_option_list, cctx);
 432 }
 433
 434 static int cmd_Certificate(SSL_CONF_CTX *cctx, const char *value)
 435 {
 436     int rv = 1;
 437     CERT *c = NULL;
 438     if (cctx->ctx != NULL) {
 439         rv = SSL_CTX_use_certificate_chain_file(cctx->ctx, value);
 440         c = cctx->ctx->cert;
 441     }
 442     if (cctx->ssl != NULL) {
 443         SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(cctx->ssl);
 444
 445         if (sc != NULL) {
 446             rv = SSL_use_certificate_chain_file(cctx->ssl, value);
 447             c = sc->cert;
 448         } else {
 449             rv = 0;
 450         }
 451     }
 452     if (rv > 0 && c != NULL && cctx->flags & SSL_CONF_FLAG_REQUIRE_PRIVATE) {
 453         char **pfilename = &cctx->cert_filename[c->key - c->pkeys];
 454
 455         OPENSSL_free(*pfilename);
 456         *pfilename = OPENSSL_strdup(value);
 457         if (*pfilename == NULL)
 458             rv = 0;
 459     }
 460
 461     return rv > 0;
 462 }
 463
 464 static int cmd_PrivateKey(SSL_CONF_CTX *cctx, const char *value)
 465 {
 466     int rv = 1;
 467     if (!(cctx->flags & SSL_CONF_FLAG_CERTIFICATE))
 468         return -2;
 469     if (cctx->ctx)
 470         rv = SSL_CTX_use_PrivateKey_file(cctx->ctx, value, SSL_FILETYPE_PEM);
 471     if (cctx->ssl)
 472         rv = SSL_use_PrivateKey_file(cctx->ssl, value, SSL_FILETYPE_PEM);
 473     return rv > 0;
 474 }
 475
 476 static int cmd_ServerInfoFile(SSL_CONF_CTX *cctx, const char *value)
 477 {
 478     int rv = 1;
 479     if (cctx->ctx)
 480         rv = SSL_CTX_use_serverinfo_file(cctx->ctx, value);
 481     return rv > 0;
 482 }
 483
 484 static int do_store(SSL_CONF_CTX *cctx,
 485                     const char *CAfile, const char *CApath, const char *CAstore,
 486                     int verify_store)
 487 {
 488     CERT *cert;
 489     X509_STORE **st;
 490     SSL_CTX *ctx;
 491     OSSL_LIB_CTX *libctx = NULL;
 492     const char *propq = NULL;
 493
 494     if (cctx->ctx != NULL) {
 495         cert = cctx->ctx->cert;
 496         ctx = cctx->ctx;
 497     } else if (cctx->ssl != NULL) {
 498         SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(cctx->ssl);
 499
 500         if (sc == NULL)
 501             return 0;
 502
 503         cert = sc->cert;
 504         ctx = cctx->ssl->ctx;
 505     } else {
 506         return 1;
 507     }
 508     if (ctx != NULL) {
 509         libctx = ctx->libctx;
 510         propq = ctx->propq;
 511     }
 512     st = verify_store ? &cert->verify_store : &cert->chain_store;
 513     if (*st == NULL) {
 514         *st = X509_STORE_new();
 515         if (*st == NULL)
 516             return 0;
 517     }
 518
 519     if (CAfile != NULL && !X509_STORE_load_file_ex(*st, CAfile, libctx, propq))
 520         return 0;
 521     if (CApath != NULL && !X509_STORE_load_path(*st, CApath))
 522         return 0;
 523     if (CAstore != NULL && !X509_STORE_load_store_ex(*st, CAstore, libctx,
 524                                                      propq))
 525         return 0;
 526     return 1;
 527 }
 528
 529 static int cmd_ChainCAPath(SSL_CONF_CTX *cctx, const char *value)
 530 {
 531     return do_store(cctx, NULL, value, NULL, 0);
 532 }
 533
 534 static int cmd_ChainCAFile(SSL_CONF_CTX *cctx, const char *value)
 535 {
 536     return do_store(cctx, value, NULL, NULL, 0);
 537 }
 538
 539 static int cmd_ChainCAStore(SSL_CONF_CTX *cctx, const char *value)
 540 {
 541     return do_store(cctx, NULL, NULL, value, 0);
 542 }
 543
 544 static int cmd_VerifyCAPath(SSL_CONF_CTX *cctx, const char *value)
 545 {
 546     return do_store(cctx, NULL, value, NULL, 1);
 547 }
 548
 549 static int cmd_VerifyCAFile(SSL_CONF_CTX *cctx, const char *value)
 550 {
 551     return do_store(cctx, value, NULL, NULL, 1);
 552 }
 553
 554 static int cmd_VerifyCAStore(SSL_CONF_CTX *cctx, const char *value)
 555 {
 556     return do_store(cctx, NULL, NULL, value, 1);
 557 }
 558
 559 static int cmd_RequestCAFile(SSL_CONF_CTX *cctx, const char *value)
 560 {
 561     if (cctx->canames == NULL)
 562         cctx->canames = sk_X509_NAME_new_null();
 563     if (cctx->canames == NULL)
 564         return 0;
 565     return SSL_add_file_cert_subjects_to_stack(cctx->canames, value);
 566 }
 567
 568 static int cmd_ClientCAFile(SSL_CONF_CTX *cctx, const char *value)
 569 {
 570     return cmd_RequestCAFile(cctx, value);
 571 }
 572
 573 static int cmd_RequestCAPath(SSL_CONF_CTX *cctx, const char *value)
 574 {
 575     if (cctx->canames == NULL)
 576         cctx->canames = sk_X509_NAME_new_null();
 577     if (cctx->canames == NULL)
 578         return 0;
 579     return SSL_add_dir_cert_subjects_to_stack(cctx->canames, value);
 580 }
 581
 582 static int cmd_ClientCAPath(SSL_CONF_CTX *cctx, const char *value)
 583 {
 584     return cmd_RequestCAPath(cctx, value);
 585 }
 586
 587 static int cmd_RequestCAStore(SSL_CONF_CTX *cctx, const char *value)
 588 {
 589     if (cctx->canames == NULL)
 590         cctx->canames = sk_X509_NAME_new_null();
 591     if (cctx->canames == NULL)
 592         return 0;
 593     return SSL_add_store_cert_subjects_to_stack(cctx->canames, value);
 594 }
 595
 596 static int cmd_ClientCAStore(SSL_CONF_CTX *cctx, const char *value)
 597 {
 598     return cmd_RequestCAStore(cctx, value);
 599 }
 600
 601 static int cmd_DHParameters(SSL_CONF_CTX *cctx, const char *value)
 602 {
 603     int rv = 0;
 604     EVP_PKEY *dhpkey = NULL;
 605     BIO *in = NULL;
 606     SSL_CTX *sslctx = (cctx->ssl != NULL) ? cctx->ssl->ctx : cctx->ctx;
 607     OSSL_DECODER_CTX *decoderctx = NULL;
 608
 609     if (cctx->ctx != NULL || cctx->ssl != NULL) {
 610         in = BIO_new(BIO_s_file());
 611         if (in == NULL)
 612             goto end;
 613         if (BIO_read_filename(in, value) <= 0)
 614             goto end;
 615
 616         decoderctx
 617             = OSSL_DECODER_CTX_new_for_pkey(&dhpkey, "PEM", NULL, "DH",
 618                                             OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS,
 619                                             sslctx->libctx, sslctx->propq);
 620         if (decoderctx == NULL)
 621             goto end;
 622         ERR_set_mark();
 623         while (!OSSL_DECODER_from_bio(decoderctx, in)
 624                && dhpkey == NULL
 625                && !BIO_eof(in));
 626         OSSL_DECODER_CTX_free(decoderctx);
 627
 628         if (dhpkey == NULL) {
 629             ERR_clear_last_mark();
 630             goto end;
 631         }
 632         ERR_pop_to_mark();
 633     } else {
 634         return 1;
 635     }
 636
 637     if (cctx->ctx != NULL) {
 638         if ((rv = SSL_CTX_set0_tmp_dh_pkey(cctx->ctx, dhpkey)) > 0)
 639             dhpkey = NULL;
 640     }
 641     if (cctx->ssl != NULL) {
 642         if ((rv = SSL_set0_tmp_dh_pkey(cctx->ssl, dhpkey)) > 0)
 643             dhpkey = NULL;
 644     }
 645  end:
 646     EVP_PKEY_free(dhpkey);
 647     BIO_free(in);
 648     return rv > 0;
 649 }
 650
 651 static int cmd_RecordPadding(SSL_CONF_CTX *cctx, const char *value)
 652 {
 653     int rv = 0;
 654     int block_size = atoi(value);
 655
 656     /*
 657      * All we care about is a non-negative value,
 658      * the setters check the range
 659      */
 660     if (block_size >= 0) {
 661         if (cctx->ctx)
 662             rv = SSL_CTX_set_block_padding(cctx->ctx, block_size);
 663         if (cctx->ssl)
 664             rv = SSL_set_block_padding(cctx->ssl, block_size);
 665     }
 666     return rv;
 667 }
 668
 669
 670 static int cmd_NumTickets(SSL_CONF_CTX *cctx, const char *value)
 671 {
 672     int rv = 0;
 673     int num_tickets = atoi(value);
 674
 675     if (num_tickets >= 0) {
 676         if (cctx->ctx)
 677             rv = SSL_CTX_set_num_tickets(cctx->ctx, num_tickets);
 678         if (cctx->ssl)
 679             rv = SSL_set_num_tickets(cctx->ssl, num_tickets);
 680     }
 681     return rv;
 682 }
 683
 684 typedef struct {
 685     int (*cmd) (SSL_CONF_CTX *cctx, const char *value);
 686     const char *str_file;
 687     const char *str_cmdline;
 688     unsigned short flags;
 689     unsigned short value_type;
 690 } ssl_conf_cmd_tbl;
 691
 692 /* Table of supported parameters */
 693
 694 #define SSL_CONF_CMD(name, cmdopt, flags, type) \
 695         {cmd_##name, #name, cmdopt, flags, type}
 696
 697 #define SSL_CONF_CMD_STRING(name, cmdopt, flags) \
 698         SSL_CONF_CMD(name, cmdopt, flags, SSL_CONF_TYPE_STRING)
 699
 700 #define SSL_CONF_CMD_SWITCH(name, flags) \
 701         {0, NULL, name, flags, SSL_CONF_TYPE_NONE}
 702
 703 /* See apps/include/opt.h if you change this table. */
 704 /* The SSL_CONF_CMD_SWITCH should be the same order as ssl_cmd_switches */
 705 static const ssl_conf_cmd_tbl ssl_conf_cmds[] = {
 706     SSL_CONF_CMD_SWITCH("no_ssl3", 0),
 707     SSL_CONF_CMD_SWITCH("no_tls1", 0),
 708     SSL_CONF_CMD_SWITCH("no_tls1_1", 0),
 709     SSL_CONF_CMD_SWITCH("no_tls1_2", 0),
 710     SSL_CONF_CMD_SWITCH("no_tls1_3", 0),
 711     SSL_CONF_CMD_SWITCH("bugs", 0),
 712     SSL_CONF_CMD_SWITCH("no_comp", 0),
 713     SSL_CONF_CMD_SWITCH("comp", 0),
 714     SSL_CONF_CMD_SWITCH("no_tx_cert_comp", 0),
 715     SSL_CONF_CMD_SWITCH("tx_cert_comp", 0),
 716     SSL_CONF_CMD_SWITCH("no_rx_cert_comp", 0),
 717     SSL_CONF_CMD_SWITCH("rx_cert_comp", 0),
 718     SSL_CONF_CMD_SWITCH("ecdh_single", SSL_CONF_FLAG_SERVER),
 719     SSL_CONF_CMD_SWITCH("no_ticket", 0),
 720     SSL_CONF_CMD_SWITCH("serverpref", SSL_CONF_FLAG_SERVER),
 721     SSL_CONF_CMD_SWITCH("legacy_renegotiation", 0),
 722     SSL_CONF_CMD_SWITCH("client_renegotiation", SSL_CONF_FLAG_SERVER),
 723     SSL_CONF_CMD_SWITCH("legacy_server_connect", SSL_CONF_FLAG_CLIENT),
 724     SSL_CONF_CMD_SWITCH("no_renegotiation", 0),
 725     SSL_CONF_CMD_SWITCH("no_resumption_on_reneg", SSL_CONF_FLAG_SERVER),
 726     SSL_CONF_CMD_SWITCH("no_legacy_server_connect", SSL_CONF_FLAG_CLIENT),
 727     SSL_CONF_CMD_SWITCH("allow_no_dhe_kex", 0),
 728     SSL_CONF_CMD_SWITCH("prioritize_chacha", SSL_CONF_FLAG_SERVER),
 729     SSL_CONF_CMD_SWITCH("strict", 0),
 730     SSL_CONF_CMD_SWITCH("no_middlebox", 0),
 731     SSL_CONF_CMD_SWITCH("anti_replay", SSL_CONF_FLAG_SERVER),
 732     SSL_CONF_CMD_SWITCH("no_anti_replay", SSL_CONF_FLAG_SERVER),
 733     SSL_CONF_CMD_SWITCH("no_etm", 0),
 734     SSL_CONF_CMD_SWITCH("no_ems", 0),
 735     SSL_CONF_CMD_STRING(SignatureAlgorithms, "sigalgs", 0),
 736     SSL_CONF_CMD_STRING(ClientSignatureAlgorithms, "client_sigalgs", 0),
 737     SSL_CONF_CMD_STRING(Curves, "curves", 0),
 738     SSL_CONF_CMD_STRING(Groups, "groups", 0),
 739     SSL_CONF_CMD_STRING(ECDHParameters, "named_curve", SSL_CONF_FLAG_SERVER),
 740     SSL_CONF_CMD_STRING(CipherString, "cipher", 0),
 741     SSL_CONF_CMD_STRING(Ciphersuites, "ciphersuites", 0),
 742     SSL_CONF_CMD_STRING(Protocol, NULL, 0),
 743     SSL_CONF_CMD_STRING(MinProtocol, "min_protocol", 0),
 744     SSL_CONF_CMD_STRING(MaxProtocol, "max_protocol", 0),
 745     SSL_CONF_CMD_STRING(Options, NULL, 0),
 746     SSL_CONF_CMD_STRING(VerifyMode, NULL, 0),
 747     SSL_CONF_CMD(Certificate, "cert", SSL_CONF_FLAG_CERTIFICATE,
 748                  SSL_CONF_TYPE_FILE),
 749     SSL_CONF_CMD(PrivateKey, "key", SSL_CONF_FLAG_CERTIFICATE,
 750                  SSL_CONF_TYPE_FILE),
 751     SSL_CONF_CMD(ServerInfoFile, NULL,
 752                  SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
 753                  SSL_CONF_TYPE_FILE),
 754     SSL_CONF_CMD(ChainCAPath, "chainCApath", SSL_CONF_FLAG_CERTIFICATE,
 755                  SSL_CONF_TYPE_DIR),
 756     SSL_CONF_CMD(ChainCAFile, "chainCAfile", SSL_CONF_FLAG_CERTIFICATE,
 757                  SSL_CONF_TYPE_FILE),
 758     SSL_CONF_CMD(ChainCAStore, "chainCAstore", SSL_CONF_FLAG_CERTIFICATE,
 759                  SSL_CONF_TYPE_STORE),
 760     SSL_CONF_CMD(VerifyCAPath, "verifyCApath", SSL_CONF_FLAG_CERTIFICATE,
 761                  SSL_CONF_TYPE_DIR),
 762     SSL_CONF_CMD(VerifyCAFile, "verifyCAfile", SSL_CONF_FLAG_CERTIFICATE,
 763                  SSL_CONF_TYPE_FILE),
 764     SSL_CONF_CMD(VerifyCAStore, "verifyCAstore", SSL_CONF_FLAG_CERTIFICATE,
 765                  SSL_CONF_TYPE_STORE),
 766     SSL_CONF_CMD(RequestCAFile, "requestCAFile", SSL_CONF_FLAG_CERTIFICATE,
 767                  SSL_CONF_TYPE_FILE),
 768     SSL_CONF_CMD(ClientCAFile, NULL,
 769                  SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
 770                  SSL_CONF_TYPE_FILE),
 771     SSL_CONF_CMD(RequestCAPath, NULL, SSL_CONF_FLAG_CERTIFICATE,
 772                  SSL_CONF_TYPE_DIR),
 773     SSL_CONF_CMD(ClientCAPath, NULL,
 774                  SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
 775                  SSL_CONF_TYPE_DIR),
 776     SSL_CONF_CMD(RequestCAStore, "requestCAStore", SSL_CONF_FLAG_CERTIFICATE,
 777                  SSL_CONF_TYPE_STORE),
 778     SSL_CONF_CMD(ClientCAStore, NULL,
 779                  SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
 780                  SSL_CONF_TYPE_STORE),
 781     SSL_CONF_CMD(DHParameters, "dhparam",
 782                  SSL_CONF_FLAG_SERVER | SSL_CONF_FLAG_CERTIFICATE,
 783                  SSL_CONF_TYPE_FILE),
 784     SSL_CONF_CMD_STRING(RecordPadding, "record_padding", 0),
 785     SSL_CONF_CMD_STRING(NumTickets, "num_tickets", SSL_CONF_FLAG_SERVER),
 786 };
 787
 788 /* Supported switches: must match order of switches in ssl_conf_cmds */
 789 static const ssl_switch_tbl ssl_cmd_switches[] = {
 790     {SSL_OP_NO_SSLv3, 0},       /* no_ssl3 */
 791     {SSL_OP_NO_TLSv1, 0},       /* no_tls1 */
 792     {SSL_OP_NO_TLSv1_1, 0},     /* no_tls1_1 */
 793     {SSL_OP_NO_TLSv1_2, 0},     /* no_tls1_2 */
 794     {SSL_OP_NO_TLSv1_3, 0},     /* no_tls1_3 */
 795     {SSL_OP_ALL, 0},            /* bugs */
 796     {SSL_OP_NO_COMPRESSION, 0}, /* no_comp */
 797     {SSL_OP_NO_COMPRESSION, SSL_TFLAG_INV}, /* comp */
 798     {SSL_OP_NO_TX_CERTIFICATE_COMPRESSION, 0}, /* no_tx_cert_comp */
 799     {SSL_OP_NO_TX_CERTIFICATE_COMPRESSION, SSL_TFLAG_INV}, /* tx_cert_comp */
 800     {SSL_OP_NO_RX_CERTIFICATE_COMPRESSION, 0}, /* no_rx_cert_comp */
 801     {SSL_OP_NO_RX_CERTIFICATE_COMPRESSION, SSL_TFLAG_INV}, /* rx_cert_comp */
 802     {SSL_OP_SINGLE_ECDH_USE, 0}, /* ecdh_single */
 803     {SSL_OP_NO_TICKET, 0},      /* no_ticket */
 804     {SSL_OP_CIPHER_SERVER_PREFERENCE, 0}, /* serverpref */
 805     /* legacy_renegotiation */
 806     {SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION, 0},
 807     /* Allow client renegotiation */
 808     {SSL_OP_ALLOW_CLIENT_RENEGOTIATION, 0},
 809     /* legacy_server_connect */
 810     {SSL_OP_LEGACY_SERVER_CONNECT, 0},
 811     /* no_renegotiation */
 812     {SSL_OP_NO_RENEGOTIATION, 0},
 813     /* no_resumption_on_reneg */
 814     {SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION, 0},
 815     /* no_legacy_server_connect */
 816     {SSL_OP_LEGACY_SERVER_CONNECT, SSL_TFLAG_INV},
 817     /* allow_no_dhe_kex */
 818     {SSL_OP_ALLOW_NO_DHE_KEX, 0},
 819     /* chacha reprioritization */
 820     {SSL_OP_PRIORITIZE_CHACHA, 0},
 821     {SSL_CERT_FLAG_TLS_STRICT, SSL_TFLAG_CERT}, /* strict */
 822     /* no_middlebox */
 823     {SSL_OP_ENABLE_MIDDLEBOX_COMPAT, SSL_TFLAG_INV},
 824     /* anti_replay */
 825     {SSL_OP_NO_ANTI_REPLAY, SSL_TFLAG_INV},
 826     /* no_anti_replay */
 827     {SSL_OP_NO_ANTI_REPLAY, 0},
 828     /* no Encrypt-then-Mac */
 829     {SSL_OP_NO_ENCRYPT_THEN_MAC, 0},
 830     /* no Extended master secret */
 831     {SSL_OP_NO_EXTENDED_MASTER_SECRET, 0},
 832 };
 833
 834 static int ssl_conf_cmd_skip_prefix(SSL_CONF_CTX *cctx, const char **pcmd)
 835 {
 836     if (pcmd == NULL || *pcmd == NULL)
 837         return 0;
 838     /* If a prefix is set, check and skip */
 839     if (cctx->prefix) {
 840         if (strlen(*pcmd) <= cctx->prefixlen)
 841             return 0;
 842         if (cctx->flags & SSL_CONF_FLAG_CMDLINE &&
 843             strncmp(*pcmd, cctx->prefix, cctx->prefixlen))
 844             return 0;
 845         if (cctx->flags & SSL_CONF_FLAG_FILE &&
 846             OPENSSL_strncasecmp(*pcmd, cctx->prefix, cctx->prefixlen))
 847             return 0;
 848         *pcmd += cctx->prefixlen;
 849     } else if (cctx->flags & SSL_CONF_FLAG_CMDLINE) {
 850         if (**pcmd != '-' || !(*pcmd)[1])
 851             return 0;
 852         *pcmd += 1;
 853     }
 854     return 1;
 855 }
 856
 857 /* Determine if a command is allowed according to cctx flags */
 858 static int ssl_conf_cmd_allowed(SSL_CONF_CTX *cctx, const ssl_conf_cmd_tbl * t)
 859 {
 860     unsigned int tfl = t->flags;
 861     unsigned int cfl = cctx->flags;
 862     if ((tfl & SSL_CONF_FLAG_SERVER) && !(cfl & SSL_CONF_FLAG_SERVER))
 863         return 0;
 864     if ((tfl & SSL_CONF_FLAG_CLIENT) && !(cfl & SSL_CONF_FLAG_CLIENT))
 865         return 0;
 866     if ((tfl & SSL_CONF_FLAG_CERTIFICATE)
 867         && !(cfl & SSL_CONF_FLAG_CERTIFICATE))
 868         return 0;
 869     return 1;
 870 }
 871
 872 static const ssl_conf_cmd_tbl *ssl_conf_cmd_lookup(SSL_CONF_CTX *cctx,
 873                                                    const char *cmd)
 874 {
 875     const ssl_conf_cmd_tbl *t;
 876     size_t i;
 877     if (cmd == NULL)
 878         return NULL;
 879
 880     /* Look for matching parameter name in table */
 881     for (i = 0, t = ssl_conf_cmds; i < OSSL_NELEM(ssl_conf_cmds); i++, t++) {
 882         if (ssl_conf_cmd_allowed(cctx, t)) {
 883             if (cctx->flags & SSL_CONF_FLAG_CMDLINE) {
 884                 if (t->str_cmdline && strcmp(t->str_cmdline, cmd) == 0)
 885                     return t;
 886             }
 887             if (cctx->flags & SSL_CONF_FLAG_FILE) {
 888                 if (t->str_file && OPENSSL_strcasecmp(t->str_file, cmd) == 0)
 889                     return t;
 890             }
 891         }
 892     }
 893     return NULL;
 894 }
 895
 896 static int ctrl_switch_option(SSL_CONF_CTX *cctx, const ssl_conf_cmd_tbl * cmd)
 897 {
 898     /* Find index of command in table */
 899     size_t idx = cmd - ssl_conf_cmds;
 900     const ssl_switch_tbl *scmd;
 901     /* Sanity check index */
 902     if (idx >= OSSL_NELEM(ssl_cmd_switches))
 903         return 0;
 904     /* Obtain switches entry with same index */
 905     scmd = ssl_cmd_switches + idx;
 906     ssl_set_option(cctx, scmd->name_flags, scmd->option_value, 1);
 907     return 1;
 908 }
 909
 910 int SSL_CONF_cmd(SSL_CONF_CTX *cctx, const char *cmd, const char *value)
 911 {
 912     const ssl_conf_cmd_tbl *runcmd;
 913     if (cmd == NULL) {
 914         ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_NULL_CMD_NAME);
 915         return 0;
 916     }
 917
 918     if (!ssl_conf_cmd_skip_prefix(cctx, &cmd))
 919         return -2;
 920
 921     runcmd = ssl_conf_cmd_lookup(cctx, cmd);
 922
 923     if (runcmd) {
 924         int rv;
 925         if (runcmd->value_type == SSL_CONF_TYPE_NONE) {
 926             return ctrl_switch_option(cctx, runcmd);
 927         }
 928         if (value == NULL)
 929             return -3;
 930         rv = runcmd->cmd(cctx, value);
 931         if (rv > 0)
 932             return 2;
 933         if (rv == -2)
 934             return -2;
 935         if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS)
 936             ERR_raise_data(ERR_LIB_SSL, SSL_R_BAD_VALUE,
 937                            "cmd=%s, value=%s", cmd, value);
 938         return 0;
 939     }
 940
 941     if (cctx->flags & SSL_CONF_FLAG_SHOW_ERRORS)
 942         ERR_raise_data(ERR_LIB_SSL, SSL_R_UNKNOWN_CMD_NAME, "cmd=%s", cmd);
 943
 944     return -2;
 945 }
 946
 947 int SSL_CONF_cmd_argv(SSL_CONF_CTX *cctx, int *pargc, char ***pargv)
 948 {
 949     int rv;
 950     const char *arg = NULL, *argn;
 951
 952     if (pargc != NULL && *pargc == 0)
 953         return 0;
 954     if (pargc == NULL || *pargc > 0)
 955         arg = **pargv;
 956     if (arg == NULL)
 957         return 0;
 958     if (pargc == NULL || *pargc > 1)
 959         argn = (*pargv)[1];
 960     else
 961         argn = NULL;
 962     cctx->flags &= ~SSL_CONF_FLAG_FILE;
 963     cctx->flags |= SSL_CONF_FLAG_CMDLINE;
 964     rv = SSL_CONF_cmd(cctx, arg, argn);
 965     if (rv > 0) {
 966         /* Success: update pargc, pargv */
 967         (*pargv) += rv;
 968         if (pargc)
 969             (*pargc) -= rv;
 970         return rv;
 971     }
 972     /* Unknown switch: indicate no arguments processed */
 973     if (rv == -2)
 974         return 0;
 975     /* Some error occurred processing command, return fatal error */
 976     if (rv == 0)
 977         return -1;
 978     return rv;
 979 }
 980
 981 int SSL_CONF_cmd_value_type(SSL_CONF_CTX *cctx, const char *cmd)
 982 {
 983     if (ssl_conf_cmd_skip_prefix(cctx, &cmd)) {
 984         const ssl_conf_cmd_tbl *runcmd;
 985         runcmd = ssl_conf_cmd_lookup(cctx, cmd);
 986         if (runcmd)
 987             return runcmd->value_type;
 988     }
 989     return SSL_CONF_TYPE_UNKNOWN;
 990 }
 991
 992 SSL_CONF_CTX *SSL_CONF_CTX_new(void)
 993 {
 994     SSL_CONF_CTX *ret = OPENSSL_zalloc(sizeof(*ret));
 995
 996     return ret;
 997 }
 998
 999 int SSL_CONF_CTX_finish(SSL_CONF_CTX *cctx)
1000 {
1001     /* See if any certificates are missing private keys */
1002     size_t i;
1003     CERT *c = NULL;
1004
1005     if (cctx->ctx != NULL) {
1006         c = cctx->ctx->cert;
1007     } else if (cctx->ssl != NULL) {
1008         SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(cctx->ssl);
1009
1010         if (sc != NULL)
1011             c = sc->cert;
1012     }
1013     if (c != NULL && cctx->flags & SSL_CONF_FLAG_REQUIRE_PRIVATE) {
1014         for (i = 0; i < SSL_PKEY_NUM; i++) {
1015             const char *p = cctx->cert_filename[i];
1016             /*
1017              * If missing private key try to load one from certificate file
1018              */
1019             if (p && !c->pkeys[i].privatekey) {
1020                 if (!cmd_PrivateKey(cctx, p))
1021                     return 0;
1022             }
1023         }
1024     }
1025     if (cctx->canames) {
1026         if (cctx->ssl)
1027             SSL_set0_CA_list(cctx->ssl, cctx->canames);
1028         else if (cctx->ctx)
1029             SSL_CTX_set0_CA_list(cctx->ctx, cctx->canames);
1030         else
1031             sk_X509_NAME_pop_free(cctx->canames, X509_NAME_free);
1032         cctx->canames = NULL;
1033     }
1034     return 1;
1035 }
1036
1037 void SSL_CONF_CTX_free(SSL_CONF_CTX *cctx)
1038 {
1039     if (cctx) {
1040         size_t i;
1041         for (i = 0; i < SSL_PKEY_NUM; i++)
1042             OPENSSL_free(cctx->cert_filename[i]);
1043         OPENSSL_free(cctx->prefix);
1044         sk_X509_NAME_pop_free(cctx->canames, X509_NAME_free);
1045         OPENSSL_free(cctx);
1046     }
1047 }
1048
1049 unsigned int SSL_CONF_CTX_set_flags(SSL_CONF_CTX *cctx, unsigned int flags)
1050 {
1051     cctx->flags |= flags;
1052     return cctx->flags;
1053 }
1054
1055 unsigned int SSL_CONF_CTX_clear_flags(SSL_CONF_CTX *cctx, unsigned int flags)
1056 {
1057     cctx->flags &= ~flags;
1058     return cctx->flags;
1059 }
1060
1061 int SSL_CONF_CTX_set1_prefix(SSL_CONF_CTX *cctx, const char *pre)
1062 {
1063     char *tmp = NULL;
1064     if (pre) {
1065         tmp = OPENSSL_strdup(pre);
1066         if (tmp == NULL)
1067             return 0;
1068     }
1069     OPENSSL_free(cctx->prefix);
1070     cctx->prefix = tmp;
1071     if (tmp)
1072         cctx->prefixlen = strlen(tmp);
1073     else
1074         cctx->prefixlen = 0;
1075     return 1;
1076 }
1077
1078 void SSL_CONF_CTX_set_ssl(SSL_CONF_CTX *cctx, SSL *ssl)
1079 {
1080     cctx->ssl = ssl;
1081     cctx->ctx = NULL;
1082     if (ssl != NULL) {
1083         SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(ssl);
1084
1085         if (sc == NULL)
1086             return;
1087         cctx->poptions = &sc->options;
1088         cctx->min_version = &sc->min_proto_version;
1089         cctx->max_version = &sc->max_proto_version;
1090         cctx->pcert_flags = &sc->cert->cert_flags;
1091         cctx->pvfy_flags = &sc->verify_mode;
1092     } else {
1093         cctx->poptions = NULL;
1094         cctx->min_version = NULL;
1095         cctx->max_version = NULL;
1096         cctx->pcert_flags = NULL;
1097         cctx->pvfy_flags = NULL;
1098     }
1099 }
1100
1101 void SSL_CONF_CTX_set_ssl_ctx(SSL_CONF_CTX *cctx, SSL_CTX *ctx)
1102 {
1103     cctx->ctx = ctx;
1104     cctx->ssl = NULL;
1105     if (ctx) {
1106         cctx->poptions = &ctx->options;
1107         cctx->min_version = &ctx->min_proto_version;
1108         cctx->max_version = &ctx->max_proto_version;
1109         cctx->pcert_flags = &ctx->cert->cert_flags;
1110         cctx->pvfy_flags = &ctx->verify_mode;
1111     } else {
1112         cctx->poptions = NULL;
1113         cctx->min_version = NULL;
1114         cctx->max_version = NULL;
1115         cctx->pcert_flags = NULL;
1116         cctx->pvfy_flags = NULL;
1117     }
1118 }