2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
58 /* X509 v3 extension utilities */
62 #include <openssl/conf.h>
63 #include <openssl/x509v3.h>
65 static STACK *ext_list = NULL;
67 static int ext_cmp(X509V3_EXT_METHOD **a, X509V3_EXT_METHOD **b);
68 static void ext_list_free(X509V3_EXT_METHOD *ext);
70 int X509V3_EXT_add(X509V3_EXT_METHOD *ext)
72 if(!ext_list && !(ext_list = sk_new(ext_cmp))) {
73 X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE);
76 if(!sk_push(ext_list, (char *)ext)) {
77 X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE);
83 static int ext_cmp(X509V3_EXT_METHOD **a, X509V3_EXT_METHOD **b)
85 return ((*a)->ext_nid - (*b)->ext_nid);
88 X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid)
90 X509V3_EXT_METHOD tmp;
93 if(!ext_list || (tmp.ext_nid < 0) ) return NULL;
94 idx = sk_find(ext_list, (char *)&tmp);
95 if(idx == -1) return NULL;
96 return (X509V3_EXT_METHOD *)sk_value(ext_list, idx);
99 X509V3_EXT_METHOD *X509V3_EXT_get(X509_EXTENSION *ext)
102 if((nid = OBJ_obj2nid(ext->object)) == NID_undef) return NULL;
103 return X509V3_EXT_get_nid(nid);
107 int X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist)
109 for(;extlist->ext_nid!=-1;extlist++)
110 if(!X509V3_EXT_add(extlist)) return 0;
114 int X509V3_EXT_add_alias(int nid_to, int nid_from)
116 X509V3_EXT_METHOD *ext, *tmpext;
117 if(!(ext = X509V3_EXT_get_nid(nid_from))) {
118 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,X509V3_R_EXTENSION_NOT_FOUND);
121 if(!(tmpext = (X509V3_EXT_METHOD *)Malloc(sizeof(X509V3_EXT_METHOD)))) {
122 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,ERR_R_MALLOC_FAILURE);
126 tmpext->ext_nid = nid_to;
127 tmpext->ext_flags |= X509V3_EXT_DYNAMIC;
131 void X509V3_EXT_cleanup(void)
133 sk_pop_free(ext_list, ext_list_free);
137 static void ext_list_free(X509V3_EXT_METHOD *ext)
139 if(ext->ext_flags & X509V3_EXT_DYNAMIC) Free(ext);
142 extern X509V3_EXT_METHOD v3_bcons, v3_nscert, v3_key_usage, v3_ext_ku;
143 extern X509V3_EXT_METHOD v3_pkey_usage_period, v3_sxnet;
144 extern X509V3_EXT_METHOD v3_ns_ia5_list[], v3_alt[], v3_skey_id, v3_akey_id;
146 extern X509V3_EXT_METHOD v3_crl_num, v3_crl_reason, v3_cpols, v3_crld;
148 int X509V3_add_standard_extensions(void)
150 X509V3_EXT_add_list(v3_ns_ia5_list);
151 X509V3_EXT_add_list(v3_alt);
152 X509V3_EXT_add(&v3_bcons);
153 X509V3_EXT_add(&v3_nscert);
154 X509V3_EXT_add(&v3_key_usage);
155 X509V3_EXT_add(&v3_ext_ku);
156 X509V3_EXT_add(&v3_skey_id);
157 X509V3_EXT_add(&v3_akey_id);
158 X509V3_EXT_add(&v3_pkey_usage_period);
159 X509V3_EXT_add(&v3_crl_num);
160 X509V3_EXT_add(&v3_sxnet);
161 X509V3_EXT_add(&v3_crl_reason);
162 X509V3_EXT_add(&v3_cpols);
163 X509V3_EXT_add(&v3_crld);
167 /* Return an extension internal structure */
169 void *X509V3_EXT_d2i(X509_EXTENSION *ext)
171 X509V3_EXT_METHOD *method;
173 if(!(method = X509V3_EXT_get(ext)) || !method->d2i) return NULL;
174 p = ext->value->data;
175 return method->d2i(NULL, &p, ext->value->length);
178 /* Get critical flag and decoded version of extension from a NID.
179 * The "idx" variable returns the last found extension and can
180 * be used to retrieve multiple extensions of the same NID.
181 * However multiple extensions with the same NID is usually
182 * due to a badly encoded certificate so if idx is NULL we
183 * choke if multiple extensions exist.
184 * The "crit" variable is set to the critical value.
185 * The return value is the decoded extension or NULL on
186 * error. The actual error can have several different causes,
187 * the value of *crit reflects the cause:
188 * >= 0, extension found but not decoded (reflects critical value).
189 * -1 extension not found.
190 * -2 extension occurs more than once.
193 void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit, int *idx)
196 X509_EXTENSION *ex, *found_ex = NULL;
202 if(idx) lastpos = *idx + 1;
204 if(lastpos < 0) lastpos = 0;
205 for(i = lastpos; i < sk_X509_EXTENSION_num(x); i++)
207 ex = sk_X509_EXTENSION_value(x, i);
208 if(OBJ_obj2nid(ex->object) == nid) {
212 } else if(found_ex) {
213 /* Found more than one */
222 if(crit) *crit = found_ex->critical;
223 return X509V3_EXT_d2i(found_ex);
226 /* Extension not found */
232 /* As above but for a passed certificate */
234 void *X509V3_X509_get_d2i(X509 *x, int nid, int *crit, int *idx)
236 return X509V3_get_d2i(x->cert_info->extensions, nid, crit, idx);
239 void *X509V3_CRL_get_d2i(X509_CRL *x, int nid, int *crit, int *idx)
241 return X509V3_get_d2i(x->crl->extensions, nid, crit, idx);
244 void *X509V3_REVOKED_get_d2i(X509_REVOKED *x, int nid, int *crit, int *idx)
246 return X509V3_get_d2i(x->extensions, nid, crit, idx);