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

   1 /* x509_vpm.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project 2004.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2004 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60
  61 #include "cryptlib.h"
  62 #include <openssl/crypto.h>
  63 #include <openssl/lhash.h>
  64 #include <openssl/buffer.h>
  65 #include <openssl/x509.h>
  66 #include <openssl/x509v3.h>
  67
  68 /* X509_VERIFY_PARAM functions */
  69
  70 static void x509_verify_param_zero(X509_VERIFY_PARAM *param)
  71         {
  72         if (!param)
  73                 return;
  74         param->name = NULL;
  75         param->purpose = 0;
  76         param->trust = 0;
  77         /*param->inh_flags = X509_VP_FLAG_DEFAULT;*/
  78         param->inh_flags = 0;
  79         param->flags = 0;
  80         param->depth = -1;
  81         if (param->policies)
  82                 {
  83                 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
  84                 param->policies = NULL;
  85                 }
  86         }
  87
  88 X509_VERIFY_PARAM *X509_VERIFY_PARAM_new(void)
  89         {
  90         X509_VERIFY_PARAM *param;
  91         param = OPENSSL_malloc(sizeof(X509_VERIFY_PARAM));
  92         memset(param, 0, sizeof(X509_VERIFY_PARAM));
  93         x509_verify_param_zero(param);
  94         return param;
  95         }
  96
  97 void X509_VERIFY_PARAM_free(X509_VERIFY_PARAM *param)
  98         {
  99         x509_verify_param_zero(param);
 100         OPENSSL_free(param);
 101         }
 102
 103 /* This function determines how parameters are "inherited" from one structure
 104  * to another. There are several different ways this can happen.
 105  *
 106  * 1. If a child structure needs to have its values initialized from a parent
 107  *    they are simply copied across. For example SSL_CTX copied to SSL.
 108  * 2. If the structure should take on values only if they are currently unset.
 109  *    For example the values in an SSL structure will take appropriate value
 110  *    for SSL servers or clients but only if the application has not set new
 111  *    ones.
 112  *
 113  * The "inh_flags" field determines how this function behaves.
 114  *
 115  * Normally any values which are set in the default are not copied from the
 116  * destination and verify flags are ORed together.
 117  *
 118  * If X509_VP_FLAG_DEFAULT is set then anything set in the source is copied
 119  * to the destination. Effectively the values in "to" become default values
 120  * which will be used only if nothing new is set in "from".
 121  *
 122  * If X509_VP_FLAG_OVERWRITE is set then all value are copied across whether
 123  * they are set or not. Flags is still Ored though.
 124  *
 125  * If X509_VP_FLAG_RESET_FLAGS is set then the flags value is copied instead
 126  * of ORed.
 127  *
 128  * If X509_VP_FLAG_LOCKED is set then no values are copied.
 129  *
 130  * If X509_VP_FLAG_ONCE is set then the current inh_flags setting is zeroed
 131  * after the next call.
 132  */
 133
 134 /* Macro to test if a field should be copied from src to dest */
 135
 136 #define test_x509_verify_param_copy(field, def) \
 137         (to_overwrite || \
 138                 ((src->field != def) && (to_default || (dest->field == def))))
 139
 140 /* Macro to test and copy a field if necessary */
 141
 142 #define x509_verify_param_copy(field, def) \
 143         if (test_x509_verify_param_copy(field, def)) \
 144                 dest->field = src->field
 145
 146
 147 int X509_VERIFY_PARAM_inherit(X509_VERIFY_PARAM *dest,
 148                                                 const X509_VERIFY_PARAM *src)
 149         {
 150         unsigned long inh_flags;
 151         int to_default, to_overwrite;
 152         if (!src)
 153                 return 1;
 154         inh_flags = dest->inh_flags | src->inh_flags;
 155
 156         if (inh_flags & X509_VP_FLAG_ONCE)
 157                 dest->inh_flags = 0;
 158
 159         if (inh_flags & X509_VP_FLAG_LOCKED)
 160                 return 1;
 161
 162         if (inh_flags & X509_VP_FLAG_DEFAULT)
 163                 to_default = 1;
 164         else
 165                 to_default = 0;
 166
 167         if (inh_flags & X509_VP_FLAG_OVERWRITE)
 168                 to_overwrite = 1;
 169         else
 170                 to_overwrite = 0;
 171
 172         x509_verify_param_copy(purpose, 0);
 173         x509_verify_param_copy(trust, 0);
 174         x509_verify_param_copy(depth, -1);
 175
 176         /* If overwrite or check time not set, copy across */
 177
 178         if (to_overwrite || !(dest->flags & X509_V_FLAG_USE_CHECK_TIME))
 179                 {
 180                 dest->check_time = src->check_time;
 181                 dest->flags &= ~X509_V_FLAG_USE_CHECK_TIME;
 182                 /* Don't need to copy flag: that is done below */
 183                 }
 184
 185         if (inh_flags & X509_VP_FLAG_RESET_FLAGS)
 186                 dest->flags = 0;
 187
 188         dest->flags |= src->flags;
 189
 190         if (test_x509_verify_param_copy(policies, NULL))
 191                 {
 192                 if (!X509_VERIFY_PARAM_set1_policies(dest, src->policies))
 193                         return 0;
 194                 }
 195
 196         return 1;
 197         }
 198
 199 int X509_VERIFY_PARAM_set1(X509_VERIFY_PARAM *to,
 200                                                 const X509_VERIFY_PARAM *from)
 201         {
 202         unsigned long save_flags = to->inh_flags;
 203         int ret;
 204         to->inh_flags |= X509_VP_FLAG_DEFAULT;
 205         ret = X509_VERIFY_PARAM_inherit(to, from);
 206         to->inh_flags = save_flags;
 207         return ret;
 208         }
 209
 210 int X509_VERIFY_PARAM_set1_name(X509_VERIFY_PARAM *param, const char *name)
 211         {
 212         if (param->name)
 213                 OPENSSL_free(param->name);
 214         param->name = BUF_strdup(name);
 215         if (param->name)
 216                 return 1;
 217         return 0;
 218         }
 219
 220 int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags)
 221         {
 222         param->flags |= flags;
 223         if (flags & X509_V_FLAG_POLICY_MASK)
 224                 param->flags |= X509_V_FLAG_POLICY_CHECK;
 225         return 1;
 226         }
 227
 228 int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, unsigned long flags)
 229         {
 230         param->flags &= ~flags;
 231         return 1;
 232         }
 233
 234 unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param)
 235         {
 236         return param->flags;
 237         }
 238
 239 int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose)
 240         {
 241         return X509_PURPOSE_set(&param->purpose, purpose);
 242         }
 243
 244 int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust)
 245         {
 246         return X509_TRUST_set(&param->trust, trust);
 247         }
 248
 249 void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth)
 250         {
 251         param->depth = depth;
 252         }
 253
 254 void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t)
 255         {
 256         param->check_time = t;
 257         param->flags |= X509_V_FLAG_USE_CHECK_TIME;
 258         }
 259
 260 int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, ASN1_OBJECT *policy)
 261         {
 262         if (!param->policies)
 263                 {
 264                 param->policies = sk_ASN1_OBJECT_new_null();
 265                 if (!param->policies)
 266                         return 0;
 267                 }
 268         if (!sk_ASN1_OBJECT_push(param->policies, policy))
 269                 return 0;
 270         return 1;
 271         }
 272
 273 int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
 274                                         STACK_OF(ASN1_OBJECT) *policies)
 275         {
 276         int i;
 277         ASN1_OBJECT *oid, *doid;
 278         if (!param)
 279                 return 0;
 280         if (param->policies)
 281                 sk_ASN1_OBJECT_pop_free(param->policies, ASN1_OBJECT_free);
 282
 283         if (!policies)
 284                 {
 285                 param->policies = NULL;
 286                 return 1;
 287                 }
 288
 289         param->policies = sk_ASN1_OBJECT_new_null();
 290         if (!param->policies)
 291                 return 0;
 292
 293         for (i = 0; i < sk_ASN1_OBJECT_num(policies); i++)
 294                 {
 295                 oid = sk_ASN1_OBJECT_value(policies, i);
 296                 doid = OBJ_dup(oid);
 297                 if (!doid)
 298                         return 0;
 299                 if (!sk_ASN1_OBJECT_push(param->policies, doid))
 300                         {
 301                         ASN1_OBJECT_free(doid);
 302                         return 0;
 303                         }
 304                 }
 305         param->flags |= X509_V_FLAG_POLICY_CHECK;
 306         return 1;
 307         }
 308
 309 int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param)
 310         {
 311         return param->depth;
 312         }
 313
 314 /* Default verify parameters: these are used for various
 315  * applications and can be overridden by the user specified table.
 316  * NB: the 'name' field *must* be in alphabetical order because it
 317  * will be searched using OBJ_search.
 318  */
 319
 320 static const X509_VERIFY_PARAM default_table[] = {
 321         {
 322         "default",      /* X509 default parameters */
 323         0,              /* Check time */
 324         0,              /* internal flags */
 325         0,              /* flags */
 326         0,              /* purpose */
 327         0,              /* trust */
 328         100,            /* depth */
 329         NULL            /* policies */
 330         },
 331         {
 332         "pkcs7",                        /* S/MIME sign parameters */
 333         0,                              /* Check time */
 334         0,                              /* internal flags */
 335         0,                              /* flags */
 336         X509_PURPOSE_SMIME_SIGN,        /* purpose */
 337         X509_TRUST_EMAIL,               /* trust */
 338         -1,                             /* depth */
 339         NULL                            /* policies */
 340         },
 341         {
 342         "smime_sign",                   /* S/MIME sign parameters */
 343         0,                              /* Check time */
 344         0,                              /* internal flags */
 345         0,                              /* flags */
 346         X509_PURPOSE_SMIME_SIGN,        /* purpose */
 347         X509_TRUST_EMAIL,               /* trust */
 348         -1,                             /* depth */
 349         NULL                            /* policies */
 350         },
 351         {
 352         "ssl_client",                   /* SSL/TLS client parameters */
 353         0,                              /* Check time */
 354         0,                              /* internal flags */
 355         0,                              /* flags */
 356         X509_PURPOSE_SSL_CLIENT,        /* purpose */
 357         X509_TRUST_SSL_CLIENT,          /* trust */
 358         -1,                             /* depth */
 359         NULL                            /* policies */
 360         },
 361         {
 362         "ssl_server",                   /* SSL/TLS server parameters */
 363         0,                              /* Check time */
 364         0,                              /* internal flags */
 365         0,                              /* flags */
 366         X509_PURPOSE_SSL_SERVER,        /* purpose */
 367         X509_TRUST_SSL_SERVER,          /* trust */
 368         -1,                             /* depth */
 369         NULL                            /* policies */
 370         }};
 371
 372 static STACK_OF(X509_VERIFY_PARAM) *param_table = NULL;
 373
 374 static int table_cmp(const X509_VERIFY_PARAM *a, const X509_VERIFY_PARAM *b)
 375
 376         {
 377         return strcmp(a->name, b->name);
 378         }
 379
 380 DECLARE_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM,
 381                            table);
 382 IMPLEMENT_OBJ_BSEARCH_CMP_FN(X509_VERIFY_PARAM, X509_VERIFY_PARAM,
 383                              table);
 384
 385 static int param_cmp(const X509_VERIFY_PARAM * const *a,
 386                         const X509_VERIFY_PARAM * const *b)
 387         {
 388         return strcmp((*a)->name, (*b)->name);
 389         }
 390
 391 int X509_VERIFY_PARAM_add0_table(X509_VERIFY_PARAM *param)
 392         {
 393         int idx;
 394         X509_VERIFY_PARAM *ptmp;
 395         if (!param_table)
 396                 {
 397                 param_table = sk_X509_VERIFY_PARAM_new(param_cmp);
 398                 if (!param_table)
 399                         return 0;
 400                 }
 401         else
 402                 {
 403                 idx = sk_X509_VERIFY_PARAM_find(param_table, param);
 404                 if (idx != -1)
 405                         {
 406                         ptmp = sk_X509_VERIFY_PARAM_value(param_table, idx);
 407                         X509_VERIFY_PARAM_free(ptmp);
 408                         (void)sk_X509_VERIFY_PARAM_delete(param_table, idx);
 409                         }
 410                 }
 411         if (!sk_X509_VERIFY_PARAM_push(param_table, param))
 412                 return 0;
 413         return 1;
 414         }
 415
 416 const X509_VERIFY_PARAM *X509_VERIFY_PARAM_lookup(const char *name)
 417         {
 418         int idx;
 419         X509_VERIFY_PARAM pm;
 420
 421         pm.name = (char *)name;
 422         if (param_table)
 423                 {
 424                 idx = sk_X509_VERIFY_PARAM_find(param_table, &pm);
 425                 if (idx != -1)
 426                         return sk_X509_VERIFY_PARAM_value(param_table, idx);
 427                 }
 428         return OBJ_bsearch_table(&pm, default_table,
 429                            sizeof(default_table)/sizeof(X509_VERIFY_PARAM));
 430         }
 431
 432 void X509_VERIFY_PARAM_table_cleanup(void)
 433         {
 434         if (param_table)
 435                 sk_X509_VERIFY_PARAM_pop_free(param_table,
 436                                                 X509_VERIFY_PARAM_free);
 437         param_table = NULL;
 438         }