release/src/router/openssl/crypto/x509/x509_vpm.c

   1 /* x509_vpm.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 2004.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2004 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 #include <stdio.h>
  61
  62 #include "cryptlib.h"
  63 #include <openssl/crypto.h>
  64 #include <openssl/lhash.h>
  65 #include <openssl/buffer.h>
  66 #include <openssl/x509.h>
  67 #include <openssl/x509v3.h>
  68
  69 #include "vpm_int.h"
  70
  71 /* X509_VERIFY_PARAM functions */
  72
  73 #define SET_HOST 0
  74 #define ADD_HOST 1
  75
  76 static char *str_copy(const char *s)
  77 {
  78     return OPENSSL_strdup(s);
  79 }
  80
  81 static void str_free(char *s)
  82 {
  83     OPENSSL_free(s);
  84 }
  85
  86 #define string_stack_free(sk) sk_OPENSSL_STRING_pop_free(sk, str_free)
  87
  88 static int int_x509_param_set_hosts(X509_VERIFY_PARAM_ID *id, int mode,
  89                                     const char *name, size_t namelen)
  90 {
  91     char *copy;
  92
  93     /*
  94      * Refuse names with embedded NUL bytes, except perhaps as final byte.
  95      * XXX: Do we need to push an error onto the error stack?
  96      */
  97     if (namelen == 0)
  98         namelen = name ? strlen(name) : 0;
  99     else if (name && memchr(name, '\0', namelen > 1 ? namelen - 1 : namelen))
 100         return 0;
 101     if (name && name[namelen - 1] == '\0')
 102         --namelen;
 103
 104     if (mode == SET_HOST && id->hosts) {
 105         string_stack_free(id->hosts);
 106         id->hosts = NULL;
 107     }
 108     if (name == NULL || namelen == 0)
 109         return 1;
 110
 111     copy = BUF_strndup(name, namelen);
 112     if (copy == NULL)
 113         return 0;
 114
 115     if (id->hosts == NULL &&
 116         (id->hosts = sk_OPENSSL_STRING_new_null()) == NULL) {
 117         OPENSSL_free(copy);
 118         return 0;
 119     }
 120
 121     if (!sk_OPENSSL_STRING_push(id->hosts, copy)) {
 122         OPENSSL_free(copy);
 123         if (sk_OPENSSL_STRING_num(id->hosts) == 0) {
 124             sk_OPENSSL_STRING_free(id->hosts);
 125             id->hosts = NULL;
 126         }
 127         return 0;
 128     }
 129
 130     return 1;
 131 }
 132
 133 static void x509_verify_param_zero(X509_VERIFY_PARAM *param)
 134 {
 135     X509_VERIFY_PARAM_ID *paramid;
 136     if (!param)
 137         return;
 138     param->name = NULL;
 139     param->purpose = 0;
 140     param->trust = 0;
 141     /*
 142      * param->inh_flags = X509_VP_FLAG_DEFAULT;
 143      */
 144     param->inh_flags = 0;
 145     param->flags = 0;
 146     param->depth = -1;
 147     if (param->policies) {
 148         sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
 149         param->policies = NULL;
 150     }
 151     paramid = param->id;
 152     if (paramid->hosts) {
 153         string_stack_free(paramid->hosts);
 154         paramid->hosts = NULL;
 155     }
 156     if (paramid->peername)
 157         OPENSSL_free(paramid->peername);
 158     if (paramid->email) {
 159         OPENSSL_free(paramid->email);
 160         paramid->email = NULL;
 161         paramid->emaillen = 0;
 162     }
 163     if (paramid->ip) {
 164         OPENSSL_free(paramid->ip);
 165         paramid->ip = NULL;
 166         paramid->iplen = 0;
 167     }
 168
 169 }
 170
 171 X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void)
 172 {
 173     X509_VERIFY_PARAM *param;
 174     X509_VERIFY_PARAM_ID *paramid;
 175     param = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM));
 176     if (!param)
 177         return NULL;
 178     paramid = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM));
 179     if (!paramid) {
 180         OPENSSL_free(param);
 181         return NULL;
 182     }
 183     memset(param, 0, sizeof(X509_VERIFY_PARAM));
 184     memset(paramid, 0, sizeof(X509_VERIFY_PARAM_ID));
 185     param->id = paramid;
 186     x509_verify_param_zero(param);
 187     return param;
 188 }
 189
 190 void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
 191 {
 192     x509_verify_param_zero(param);
 193     OPENSSL_free(param->id);
 194     OPENSSL_free(param);
 195 }
 196
 197 /*-
 198  * This function determines how parameters are "inherited" from one structure
 199  * to another. There are several different ways this can happen.
 200  *
 201  * 1. If a child structure needs to have its values initialized from a parent
 202  *    they are simply copied across. For example SSL_CTX copied to SSL.
 203  * 2. If the structure should take on values only if they are currently unset.
 204  *    For example the values in an SSL structure will take appropriate value
 205  *    for SSL servers or clients but only if the application has not set new
 206  *    ones.
 207  *
 208  * The "inh_flags" field determines how this function behaves.
 209  *
 210  * Normally any values which are set in the default are not copied from the
 211  * destination and verify flags are ORed together.
 212  *
 213  * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied
 214  * to the destination. Effectively the values in "to" become default values
 215  * which will be used only if nothing new is set in "from".
 216  *
 217  * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether
 218  * they are set or not. Flags is still Ored though.
 219  *
 220  * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead
 221  * of ORed.
 222  *
 223  * If X509_VP_FLAG_LOCKED is set then no values are copied.
 224  *
 225  * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed
 226  * after the next call.
 227  */
 228
 229 /* Macro to test if a field should be copied from src to dest */
 230
 231 #define test_x509_verify_param_copy(field, def) \
 232         (to_overwrite || \
 233                 ((src->field != def) && (to_default || (dest->field == def))))
 234
 235 /* As above but for ID fields */
 236
 237 #define test_x509_verify_param_copy_id(idf, def) \
 238         test_x509_verify_param_copy(id->idf, def)
 239
 240 /* Macro to test and copy a field if necessary */
 241
 242 #define x509_verify_param_copy(field, def) \
 243         if (test_x509_verify_param_copy(field, def)) \
 244                 dest->field = src->field
 245
 246 int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest,
 247                               const X509_VERIFY_PARAM *src)
 248 {
 249     unsigned long inh_flags;
 250     int to_default, to_overwrite;
 251     X509_VERIFY_PARAM_ID *id;
 252     if (!src)
 253         return 1;
 254     id = src->id;
 255     inh_flags = dest->inh_flags | src->inh_flags;
 256
 257     if (inh_flags & X509_VP_FLAG_ONCE)
 258         dest->inh_flags = 0;
 259
 260     if (inh_flags & X509_VP_FLAG_LOCKED)
 261         return 1;
 262
 263     if (inh_flags & X509_VP_FLAG_DEFAULT)
 264         to_default = 1;
 265     else
 266         to_default = 0;
 267
 268     if (inh_flags & X509_VP_FLAG_OVERWRITE)
 269         to_overwrite = 1;
 270     else
 271         to_overwrite = 0;
 272
 273     x509_verify_param_copy(purpose, 0);
 274     x509_verify_param_copy(trust, 0);
 275     x509_verify_param_copy(depth, -1);
 276
 277     /* If overwrite or check time not set, copy across */
 278
 279     if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME)) {
 280         dest->check_time = src->check_time;
 281         dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME;
 282         /* Don't need to copy flag: that is done below */
 283     }
 284
 285     if (inh_flags & X509_VP_FLAG_RESET_FLAGS)
 286         dest->flags = 0;
 287
 288     dest->flags |= src->flags;
 289
 290     if (test_x509_verify_param_copy(policies, NULL)) {
 291         if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies))
 292             return 0;
 293     }
 294
 295     /* Copy the host flags if and only if we're copying the host list */
 296     if (test_x509_verify_param_copy_id(hosts, NULL)) {
 297         if (dest->id->hosts) {
 298             string_stack_free(dest->id->hosts);
 299             dest->id->hosts = NULL;
 300         }
 301         if (id->hosts) {
 302             dest->id->hosts =
 303                 sk_OPENSSL_STRING_deep_copy(id->hosts, str_copy, str_free);
 304             if (dest->id->hosts == NULL)
 305                 return 0;
 306             dest->id->hostflags = id->hostflags;
 307         }
 308     }
 309
 310     if (test_x509_verify_param_copy_id(email, NULL)) {
 311         if (!X509_VERIFY_PARAM_set1_email(dest, id->email, id->emaillen))
 312             return 0;
 313     }
 314
 315     if (test_x509_verify_param_copy_id(ip, NULL)) {
 316         if (!X509_VERIFY_PARAM_set1_ip(dest, id->ip, id->iplen))
 317             return 0;
 318     }
 319
 320     return 1;
 321 }
 322
 323 int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to,
 324                            const X509_VERIFY_PARAM *from)
 325 {
 326     unsigned long save_flags = to->inh_flags;
 327     int ret;
 328     to->inh_flags |= X509_VP_FLAG_DEFAULT;
 329     ret = X509_VERIFY_PARAM_inherit(to, from);
 330     to->inh_flags = save_flags;
 331     return ret;
 332 }
 333
 334 static int int_x509_param_set1(char **pdest, size_t *pdestlen,
 335                                const char *src, size_t srclen)
 336 {
 337     void *tmp;
 338     if (src) {
 339         if (srclen == 0) {
 340             tmp = BUF_strdup(src);
 341             srclen = strlen(src);
 342         } else
 343             tmp = BUF_memdup(src, srclen);
 344         if (!tmp)
 345             return 0;
 346     } else {
 347         tmp = NULL;
 348         srclen = 0;
 349     }
 350     if (*pdest)
 351         OPENSSL_free(*pdest);
 352     *pdest = tmp;
 353     if (pdestlen)
 354         *pdestlen = srclen;
 355     return 1;
 356 }
 357
 358 int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name)
 359 {
 360     if (param->name)
 361         OPENSSL_free(param->name);
 362     param->name = BUF_strdup(name);
 363     if (param->name)
 364         return 1;
 365     return 0;
 366 }
 367
 368 int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags)
 369 {
 370     param->flags |= flags;
 371     if (flags & X509_V_FLAG_POLICY_MASK)
 372         param->flags |= X509_V_FLAG_POLICY_CHECK;
 373     return 1;
 374 }
 375
 376 int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param,
 377                                   unsigned long flags)
 378 {
 379     param->flags &= ~flags;
 380     return 1;
 381 }
 382
 383 unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param)
 384 {
 385     return param->flags;
 386 }
 387
 388 int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose)
 389 {
 390     return X509_PURPOSE_set(&param->purpose, purpose);
 391 }
 392
 393 int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust)
 394 {
 395     return X509_TRUST_set(&param->trust, trust);
 396 }
 397
 398 void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth)
 399 {
 400     param->depth = depth;
 401 }
 402
 403 void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t)
 404 {
 405     param->check_time = t;
 406     param->flags |= X509_V_FLAG_USE_CHECK_TIME;
 407 }
 408
 409 int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param,
 410                                   ASN1_OBJECT *policy)
 411 {
 412     if (!param->policies) {
 413         param->policies = sk_ASN1_OBJECT_new_null();
 414         if (!param->policies)
 415             return 0;
 416     }
 417     if (!sk_ASN1_OBJECT_push(param->policies, policy))
 418         return 0;
 419     return 1;
 420 }
 421
 422 int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
 423                                     STACK_OF(ASN1_OBJECT) *policies)
 424 {
 425     int i;
 426     ASN1_OBJECT *oid, *doid;
 427     if (!param)
 428         return 0;
 429     if (param->policies)
 430         sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
 431
 432     if (!policies) {
 433         param->policies = NULL;
 434         return 1;
 435     }
 436
 437     param->policies = sk_ASN1_OBJECT_new_null();
 438     if (!param->policies)
 439         return 0;
 440
 441     for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++) {
 442         oid = sk_ASN1_OBJECT_value(policies, i);
 443         doid = OBJ_dup(oid);
 444         if (!doid)
 445             return 0;
 446         if (!sk_ASN1_OBJECT_push(param->policies, doid)) {
 447             ASN1_OBJECT_free(doid);
 448             return 0;
 449         }
 450     }
 451     param->flags |= X509_V_FLAG_POLICY_CHECK;
 452     return 1;
 453 }
 454
 455 int X509_VERIFY_PARAM_set1_host(X509_VERIFY_PARAM *param,
 456                                 const char *name, size_t namelen)
 457 {
 458     return int_x509_param_set_hosts(param->id, SET_HOST, name, namelen);
 459 }
 460
 461 int X509_VERIFY_PARAM_add1_host(X509_VERIFY_PARAM *param,
 462                                 const char *name, size_t namelen)
 463 {
 464     return int_x509_param_set_hosts(param->id, ADD_HOST, name, namelen);
 465 }
 466
 467 void X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *param,
 468                                      unsigned int flags)
 469 {
 470     param->id->hostflags = flags;
 471 }
 472
 473 char *X509_VERIFY_PARAM_get0_peername(X509_VERIFY_PARAM *param)
 474 {
 475     return param->id->peername;
 476 }
 477
 478 int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param,
 479                                  const char *email, size_t emaillen)
 480 {
 481     return int_x509_param_set1(&param->id->email, &param->id->emaillen,
 482                                email, emaillen);
 483 }
 484
 485 int X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM *param,
 486                               const unsigned char *ip, size_t iplen)
 487 {
 488     if (iplen != 0 && iplen != 4 && iplen != 16)
 489         return 0;
 490     return int_x509_param_set1((char **)&param->id->ip, &param->id->iplen,
 491                                (char *)ip, iplen);
 492 }
 493
 494 int X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM *param, const char *ipasc)
 495 {
 496     unsigned char ipout[16];
 497     size_t iplen;
 498
 499     iplen = (size_t)a2i_ipadd(ipout, ipasc);
 500     if (iplen == 0)
 501         return 0;
 502     return X509_VERIFY_PARAM_set1_ip(param, ipout, iplen);
 503 }
 504
 505 int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param)
 506 {
 507     return param->depth;
 508 }
 509
 510 const char *X509_VERIFY_PARAM_get0_name(const X509_VERIFY_PARAM *param)
 511 {
 512     return param->name;
 513 }
 514
 515 static X509_VERIFY_PARAM_ID _empty_id = { NULL, 0U, NULL, NULL, 0, NULL, 0 };
 516
 517 #define vpm_empty_id (X509_VERIFY_PARAM_ID *)&_empty_id
 518
 519 /*
 520  * Default verify parameters: these are used for various applications and can
 521  * be overridden by the user specified table. NB: the 'name' field *must* be
 522  * in alphabetical order because it will be searched using OBJ_search.
 523  */
 524
 525 static const X509_VERIFY_PARAM default_table[] = {
 526     {
 527      "default",                 /* X509 default parameters */
 528      0,                         /* Check time */
 529      0,                         /* internal flags */
 530      0,                         /* flags */
 531      0,                         /* purpose */
 532      0,                         /* trust */
 533      100,                       /* depth */
 534      NULL,                      /* policies */
 535      vpm_empty_id},
 536     {
 537      "pkcs7",                   /* S/MIME sign parameters */
 538      0,                         /* Check time */
 539      0,                         /* internal flags */
 540      0,                         /* flags */
 541      X509_PURPOSE_SMIME_SIGN,   /* purpose */
 542      X509_TRUST_EMAIL,          /* trust */
 543      -1,                        /* depth */
 544      NULL,                      /* policies */
 545      vpm_empty_id},
 546     {
 547      "smime_sign",              /* S/MIME sign parameters */
 548      0,                         /* Check time */
 549      0,                         /* internal flags */
 550      0,                         /* flags */
 551      X509_PURPOSE_SMIME_SIGN,   /* purpose */
 552      X509_TRUST_EMAIL,          /* trust */
 553      -1,                        /* depth */
 554      NULL,                      /* policies */
 555      vpm_empty_id},
 556     {
 557      "ssl_client",              /* SSL/TLS client parameters */
 558      0,                         /* Check time */
 559      0,                         /* internal flags */
 560      0,                         /* flags */
 561      X509_PURPOSE_SSL_CLIENT,   /* purpose */
 562      X509_TRUST_SSL_CLIENT,     /* trust */
 563      -1,                        /* depth */
 564      NULL,                      /* policies */
 565      vpm_empty_id},
 566     {
 567      "ssl_server",              /* SSL/TLS server parameters */
 568      0,                         /* Check time */
 569      0,                         /* internal flags */
 570      0,                         /* flags */
 571      X509_PURPOSE_SSL_SERVER,   /* purpose */
 572      X509_TRUST_SSL_SERVER,     /* trust */
 573      -1,                        /* depth */
 574      NULL,                      /* policies */
 575      vpm_empty_id}
 576 };
 577
 578 static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;
 579
 580 static int table_cmp(const X509_VERIFY_PARAM *a, const X509_VERIFY_PARAM *b)
 581 {
 582     return strcmp(a->name, b->name);
 583 }
 584
 585 DECLARE_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);
 586 IMPLEMENT_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM, table);
 587
 588 static int param_cmp(const X509_VERIFY_PARAM *const *a,
 589                      const X509_VERIFY_PARAM *const *b)
 590 {
 591     return strcmp((*a)->name, (*b)->name);
 592 }
 593
 594 int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param)
 595 {
 596     int idx;
 597     X509_VERIFY_PARAM *ptmp;
 598     if (!param_table) {
 599         param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
 600         if (!param_table)
 601             return 0;
 602     } else {
 603         idx = sk_X509_VERIFY_PARAM_find(param_table, param);
 604         if (idx != -1) {
 605             ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx);
 606             X509_VERIFY_PARAM_free(ptmp);
 607             (void)sk_X509_VERIFY_PARAM_delete(param_table, idx);
 608         }
 609     }
 610     if (!sk_X509_VERIFY_PARAM_push(param_table, param))
 611         return 0;
 612     return 1;
 613 }
 614
 615 int X509_VERIFY_PARAM_get_count(void)
 616 {
 617     int num = sizeof(default_table) / sizeof(X509_VERIFY_PARAM);
 618     if (param_table)
 619         num += sk_X509_VERIFY_PARAM_num(param_table);
 620     return num;
 621 }
 622
 623 const X509_VERIFY_PARAM *X509_VERIFY_PARAM_get0(int id)
 624 {
 625     int num = sizeof(default_table) / sizeof(X509_VERIFY_PARAM);
 626     if (id < num)
 627         return default_table + id;
 628     return sk_X509_VERIFY_PARAM_value(param_table, id - num);
 629 }
 630
 631 const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name)
 632 {
 633     int idx;
 634     X509_VERIFY_PARAM pm;
 635
 636     pm.name = (char *)name;
 637     if (param_table) {
 638         idx = sk_X509_VERIFY_PARAM_find(param_table, &pm);
 639         if (idx != -1)
 640             return sk_X509_VERIFY_PARAM_value(param_table, idx);
 641     }
 642     return OBJ_bsearch_table(&pm, default_table,
 643                              sizeof(default_table) /
 644                              sizeof(X509_VERIFY_PARAM));
 645 }
 646
 647 void X509_VERIFY_PARAM_table_cleanup(void)
 648 {
 649     if (param_table)
 650         sk_X509_VERIFY_PARAM_pop_free(param_table, X509_VERIFY_PARAM_free);
 651     param_table = NULL;
 652 }