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      1 /* pcy_map.c */
      2 /* Written by Dr Stephen N Henson (steve (at) 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 (at) 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 (at) cryptsoft.com).  This product includes software written by Tim
     55  * Hudson (tjh (at) cryptsoft.com).
     56  *
     57  */
     58 
     59 #include "cryptlib.h"
     60 #include <openssl/x509.h>
     61 #include <openssl/x509v3.h>
     62 
     63 #include "pcy_int.h"
     64 
     65 static int ref_cmp(const X509_POLICY_REF * const *a,
     66 			const X509_POLICY_REF * const *b)
     67 	{
     68 	return OBJ_cmp((*a)->subjectDomainPolicy, (*b)->subjectDomainPolicy);
     69 	}
     70 
     71 static void policy_map_free(X509_POLICY_REF *map)
     72 	{
     73 	if (map->subjectDomainPolicy)
     74 		ASN1_OBJECT_free(map->subjectDomainPolicy);
     75 	OPENSSL_free(map);
     76 	}
     77 
     78 static X509_POLICY_REF *policy_map_find(X509_POLICY_CACHE *cache, ASN1_OBJECT *id)
     79 	{
     80 	X509_POLICY_REF tmp;
     81 	int idx;
     82 	tmp.subjectDomainPolicy = id;
     83 
     84 	idx = sk_X509_POLICY_REF_find(cache->maps, &tmp);
     85 	if (idx == -1)
     86 		return NULL;
     87 	return sk_X509_POLICY_REF_value(cache->maps, idx);
     88 	}
     89 
     90 /* Set policy mapping entries in cache.
     91  * Note: this modifies the passed POLICY_MAPPINGS structure
     92  */
     93 
     94 int policy_cache_set_mapping(X509 *x, POLICY_MAPPINGS *maps)
     95 	{
     96 	POLICY_MAPPING *map;
     97 	X509_POLICY_REF *ref = NULL;
     98 	X509_POLICY_DATA *data;
     99 	X509_POLICY_CACHE *cache = x->policy_cache;
    100 	int i;
    101 	int ret = 0;
    102 	if (sk_POLICY_MAPPING_num(maps) == 0)
    103 		{
    104 		ret = -1;
    105 		goto bad_mapping;
    106 		}
    107 	cache->maps = sk_X509_POLICY_REF_new(ref_cmp);
    108 	for (i = 0; i < sk_POLICY_MAPPING_num(maps); i++)
    109 		{
    110 		map = sk_POLICY_MAPPING_value(maps, i);
    111 		/* Reject if map to or from anyPolicy */
    112 		if ((OBJ_obj2nid(map->subjectDomainPolicy) == NID_any_policy)
    113 		   || (OBJ_obj2nid(map->issuerDomainPolicy) == NID_any_policy))
    114 			{
    115 			ret = -1;
    116 			goto bad_mapping;
    117 			}
    118 
    119 		/* If we've already mapped from this OID bad mapping */
    120 		if (policy_map_find(cache, map->subjectDomainPolicy) != NULL)
    121 			{
    122 			ret = -1;
    123 			goto bad_mapping;
    124 			}
    125 
    126 		/* Attempt to find matching policy data */
    127 		data = policy_cache_find_data(cache, map->issuerDomainPolicy);
    128 		/* If we don't have anyPolicy can't map */
    129 		if (!data && !cache->anyPolicy)
    130 			continue;
    131 
    132 		/* Create a NODE from anyPolicy */
    133 		if (!data)
    134 			{
    135 			data = policy_data_new(NULL, map->issuerDomainPolicy,
    136 					cache->anyPolicy->flags
    137 						& POLICY_DATA_FLAG_CRITICAL);
    138 			if (!data)
    139 				goto bad_mapping;
    140 			data->qualifier_set = cache->anyPolicy->qualifier_set;
    141 			map->issuerDomainPolicy = NULL;
    142 			data->flags |= POLICY_DATA_FLAG_MAPPED_ANY;
    143 			data->flags |= POLICY_DATA_FLAG_SHARED_QUALIFIERS;
    144 			if (!sk_X509_POLICY_DATA_push(cache->data, data))
    145 				{
    146 				policy_data_free(data);
    147 				goto bad_mapping;
    148 				}
    149 			}
    150 		else
    151 			data->flags |= POLICY_DATA_FLAG_MAPPED;
    152 
    153 		if (!sk_ASN1_OBJECT_push(data->expected_policy_set,
    154 						map->subjectDomainPolicy))
    155 			goto bad_mapping;
    156 
    157 		ref = OPENSSL_malloc(sizeof(X509_POLICY_REF));
    158 		if (!ref)
    159 			goto bad_mapping;
    160 
    161 		ref->subjectDomainPolicy = map->subjectDomainPolicy;
    162 		map->subjectDomainPolicy = NULL;
    163 		ref->data = data;
    164 
    165 		if (!sk_X509_POLICY_REF_push(cache->maps, ref))
    166 			goto bad_mapping;
    167 
    168 		ref = NULL;
    169 
    170 		}
    171 
    172 	ret = 1;
    173 	bad_mapping:
    174 	if (ret == -1)
    175 		x->ex_flags |= EXFLAG_INVALID_POLICY;
    176 	if (ref)
    177 		policy_map_free(ref);
    178 	if (ret <= 0)
    179 		{
    180 		sk_X509_POLICY_REF_pop_free(cache->maps, policy_map_free);
    181 		cache->maps = NULL;
    182 		}
    183 	sk_POLICY_MAPPING_pop_free(maps, POLICY_MAPPING_free);
    184 	return ret;
    185 
    186 	}
    187