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>
67 static STACK_OF(X509V3_EXT_METHOD) *ext_list = NULL;
69 static int ext_cmp(const X509V3_EXT_METHOD * const *a,
70 const X509V3_EXT_METHOD * const *b);
71 static void ext_list_free(X509V3_EXT_METHOD *ext);
73 int X509V3_EXT_add(X509V3_EXT_METHOD *ext)
75 if(!ext_list && !(ext_list = sk_X509V3_EXT_METHOD_new(ext_cmp))) {
76 X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE);
79 if(!sk_X509V3_EXT_METHOD_push(ext_list, ext)) {
80 X509V3err(X509V3_F_X509V3_EXT_ADD,ERR_R_MALLOC_FAILURE);
86 static int ext_cmp(const X509V3_EXT_METHOD * const *a,
87 const X509V3_EXT_METHOD * const *b)
89 return ((*a)->ext_nid - (*b)->ext_nid);
92 X509V3_EXT_METHOD *X509V3_EXT_get_nid(int nid)
94 X509V3_EXT_METHOD tmp, *t = &tmp, **ret;
96 if(nid < 0) return NULL;
98 ret = (X509V3_EXT_METHOD **) OBJ_bsearch((char *)&t,
99 (char *)standard_exts, STANDARD_EXTENSION_COUNT,
100 sizeof(X509V3_EXT_METHOD *), (int (*)(const void *, const void *))ext_cmp);
102 if(!ext_list) return NULL;
103 idx = sk_X509V3_EXT_METHOD_find(ext_list, &tmp);
104 if(idx == -1) return NULL;
105 return sk_X509V3_EXT_METHOD_value(ext_list, idx);
108 X509V3_EXT_METHOD *X509V3_EXT_get(X509_EXTENSION *ext)
111 if((nid = OBJ_obj2nid(ext->object)) == NID_undef) return NULL;
112 return X509V3_EXT_get_nid(nid);
116 int X509V3_EXT_add_list(X509V3_EXT_METHOD *extlist)
118 for(;extlist->ext_nid!=-1;extlist++)
119 if(!X509V3_EXT_add(extlist)) return 0;
123 int X509V3_EXT_add_alias(int nid_to, int nid_from)
125 X509V3_EXT_METHOD *ext, *tmpext;
126 if(!(ext = X509V3_EXT_get_nid(nid_from))) {
127 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,X509V3_R_EXTENSION_NOT_FOUND);
130 if(!(tmpext = (X509V3_EXT_METHOD *)OPENSSL_malloc(sizeof(X509V3_EXT_METHOD)))) {
131 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS,ERR_R_MALLOC_FAILURE);
135 tmpext->ext_nid = nid_to;
136 tmpext->ext_flags |= X509V3_EXT_DYNAMIC;
137 return X509V3_EXT_add(tmpext);
140 void X509V3_EXT_cleanup(void)
142 sk_X509V3_EXT_METHOD_pop_free(ext_list, ext_list_free);
146 static void ext_list_free(X509V3_EXT_METHOD *ext)
148 if(ext->ext_flags & X509V3_EXT_DYNAMIC) OPENSSL_free(ext);
151 /* Legacy function: we don't need to add standard extensions
152 * any more because they are now kept in ext_dat.h.
155 int X509V3_add_standard_extensions(void)
160 /* Return an extension internal structure */
162 void *X509V3_EXT_d2i(X509_EXTENSION *ext)
164 X509V3_EXT_METHOD *method;
166 if(!(method = X509V3_EXT_get(ext)) || !method->d2i) return NULL;
167 p = ext->value->data;
168 return method->d2i(NULL, &p, ext->value->length);
171 /* Get critical flag and decoded version of extension from a NID.
172 * The "idx" variable returns the last found extension and can
173 * be used to retrieve multiple extensions of the same NID.
174 * However multiple extensions with the same NID is usually
175 * due to a badly encoded certificate so if idx is NULL we
176 * choke if multiple extensions exist.
177 * The "crit" variable is set to the critical value.
178 * The return value is the decoded extension or NULL on
179 * error. The actual error can have several different causes,
180 * the value of *crit reflects the cause:
181 * >= 0, extension found but not decoded (reflects critical value).
182 * -1 extension not found.
183 * -2 extension occurs more than once.
186 void *X509V3_get_d2i(STACK_OF(X509_EXTENSION) *x, int nid, int *crit, int *idx)
189 X509_EXTENSION *ex, *found_ex = NULL;
195 if(idx) lastpos = *idx + 1;
197 if(lastpos < 0) lastpos = 0;
198 for(i = lastpos; i < sk_X509_EXTENSION_num(x); i++)
200 ex = sk_X509_EXTENSION_value(x, i);
201 if(OBJ_obj2nid(ex->object) == nid) {
205 } else if(found_ex) {
206 /* Found more than one */
215 if(crit) *crit = found_ex->critical;
216 return X509V3_EXT_d2i(found_ex);
219 /* Extension not found */
225 IMPLEMENT_STACK_OF(X509V3_EXT_METHOD)