2 * Copyright 1999-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* X509 v3 extension utilities */
13 #include "internal/cryptlib.h"
14 #include <openssl/conf.h>
15 #include <openssl/x509v3.h>
19 static STACK_OF(X509V3_EXT_METHOD
) *ext_list
= NULL
;
21 static int ext_cmp(const X509V3_EXT_METHOD
*const *a
,
22 const X509V3_EXT_METHOD
*const *b
);
23 static void ext_list_free(X509V3_EXT_METHOD
*ext
);
25 int X509V3_EXT_add(X509V3_EXT_METHOD
*ext
)
28 && (ext_list
= sk_X509V3_EXT_METHOD_new(ext_cmp
)) == NULL
) {
29 X509V3err(X509V3_F_X509V3_EXT_ADD
, ERR_R_MALLOC_FAILURE
);
32 if (!sk_X509V3_EXT_METHOD_push(ext_list
, ext
)) {
33 X509V3err(X509V3_F_X509V3_EXT_ADD
, ERR_R_MALLOC_FAILURE
);
39 static int ext_cmp(const X509V3_EXT_METHOD
*const *a
,
40 const X509V3_EXT_METHOD
*const *b
)
42 return ((*a
)->ext_nid
- (*b
)->ext_nid
);
45 DECLARE_OBJ_BSEARCH_CMP_FN(const X509V3_EXT_METHOD
*,
46 const X509V3_EXT_METHOD
*, ext
);
47 IMPLEMENT_OBJ_BSEARCH_CMP_FN(const X509V3_EXT_METHOD
*,
48 const X509V3_EXT_METHOD
*, ext
);
50 #include "standard_exts.h"
52 const X509V3_EXT_METHOD
*X509V3_EXT_get_nid(int nid
)
54 X509V3_EXT_METHOD tmp
;
55 const X509V3_EXT_METHOD
*t
= &tmp
, *const *ret
;
61 ret
= OBJ_bsearch_ext(&t
, standard_exts
, STANDARD_EXTENSION_COUNT
);
66 idx
= sk_X509V3_EXT_METHOD_find(ext_list
, &tmp
);
67 return sk_X509V3_EXT_METHOD_value(ext_list
, idx
);
70 const X509V3_EXT_METHOD
*X509V3_EXT_get(X509_EXTENSION
*ext
)
73 if ((nid
= OBJ_obj2nid(X509_EXTENSION_get_object(ext
))) == NID_undef
)
75 return X509V3_EXT_get_nid(nid
);
78 int X509V3_EXT_add_list(X509V3_EXT_METHOD
*extlist
)
80 for (; extlist
->ext_nid
!= -1; extlist
++)
81 if (!X509V3_EXT_add(extlist
))
86 int X509V3_EXT_add_alias(int nid_to
, int nid_from
)
88 const X509V3_EXT_METHOD
*ext
;
89 X509V3_EXT_METHOD
*tmpext
;
91 if ((ext
= X509V3_EXT_get_nid(nid_from
)) == NULL
) {
92 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS
, X509V3_R_EXTENSION_NOT_FOUND
);
95 if ((tmpext
= OPENSSL_malloc(sizeof(*tmpext
))) == NULL
) {
96 X509V3err(X509V3_F_X509V3_EXT_ADD_ALIAS
, ERR_R_MALLOC_FAILURE
);
100 tmpext
->ext_nid
= nid_to
;
101 tmpext
->ext_flags
|= X509V3_EXT_DYNAMIC
;
102 return X509V3_EXT_add(tmpext
);
105 void X509V3_EXT_cleanup(void)
107 sk_X509V3_EXT_METHOD_pop_free(ext_list
, ext_list_free
);
111 static void ext_list_free(X509V3_EXT_METHOD
*ext
)
113 if (ext
->ext_flags
& X509V3_EXT_DYNAMIC
)
118 * Legacy function: we don't need to add standard extensions any more because
119 * they are now kept in ext_dat.h.
122 int X509V3_add_standard_extensions(void)
127 /* Return an extension internal structure */
129 void *X509V3_EXT_d2i(X509_EXTENSION
*ext
)
131 const X509V3_EXT_METHOD
*method
;
132 const unsigned char *p
;
133 ASN1_STRING
*extvalue
;
136 if ((method
= X509V3_EXT_get(ext
)) == NULL
)
138 extvalue
= X509_EXTENSION_get_data(ext
);
139 p
= ASN1_STRING_get0_data(extvalue
);
140 extlen
= ASN1_STRING_length(extvalue
);
142 return ASN1_item_d2i(NULL
, &p
, extlen
, ASN1_ITEM_ptr(method
->it
));
143 return method
->d2i(NULL
, &p
, extlen
);
147 * Get critical flag and decoded version of extension from a NID.
148 * The "idx" variable returns the last found extension and can
149 * be used to retrieve multiple extensions of the same NID.
150 * However multiple extensions with the same NID is usually
151 * due to a badly encoded certificate so if idx is NULL we
152 * choke if multiple extensions exist.
153 * The "crit" variable is set to the critical value.
154 * The return value is the decoded extension or NULL on
155 * error. The actual error can have several different causes,
156 * the value of *crit reflects the cause:
157 * >= 0, extension found but not decoded (reflects critical value).
158 * -1 extension not found.
159 * -2 extension occurs more than once.
162 void *X509V3_get_d2i(const STACK_OF(X509_EXTENSION
) *x
, int nid
, int *crit
,
166 X509_EXTENSION
*ex
, *found_ex
= NULL
;
181 for (i
= lastpos
; i
< sk_X509_EXTENSION_num(x
); i
++) {
182 ex
= sk_X509_EXTENSION_value(x
, i
);
183 if (OBJ_obj2nid(X509_EXTENSION_get_object(ex
)) == nid
) {
188 } else if (found_ex
) {
189 /* Found more than one */
200 *crit
= X509_EXTENSION_get_critical(found_ex
);
201 return X509V3_EXT_d2i(found_ex
);
204 /* Extension not found */
213 * This function is a general extension append, replace and delete utility.
214 * The precise operation is governed by the 'flags' value. The 'crit' and
215 * 'value' arguments (if relevant) are the extensions internal structure.
218 int X509V3_add1_i2d(STACK_OF(X509_EXTENSION
) **x
, int nid
, void *value
,
219 int crit
, unsigned long flags
)
221 int errcode
, extidx
= -1;
222 X509_EXTENSION
*ext
= NULL
, *extmp
;
223 STACK_OF(X509_EXTENSION
) *ret
= NULL
;
224 unsigned long ext_op
= flags
& X509V3_ADD_OP_MASK
;
227 * If appending we don't care if it exists, otherwise look for existing
230 if (ext_op
!= X509V3_ADD_APPEND
)
231 extidx
= X509v3_get_ext_by_NID(*x
, nid
, -1);
233 /* See if extension exists */
235 /* If keep existing, nothing to do */
236 if (ext_op
== X509V3_ADD_KEEP_EXISTING
)
238 /* If default then its an error */
239 if (ext_op
== X509V3_ADD_DEFAULT
) {
240 errcode
= X509V3_R_EXTENSION_EXISTS
;
243 /* If delete, just delete it */
244 if (ext_op
== X509V3_ADD_DELETE
) {
245 if (!sk_X509_EXTENSION_delete(*x
, extidx
))
251 * If replace existing or delete, error since extension must exist
253 if ((ext_op
== X509V3_ADD_REPLACE_EXISTING
) ||
254 (ext_op
== X509V3_ADD_DELETE
)) {
255 errcode
= X509V3_R_EXTENSION_NOT_FOUND
;
261 * If we get this far then we have to create an extension: could have
262 * some flags for alternative encoding schemes...
265 ext
= X509V3_EXT_i2d(nid
, crit
, value
);
268 X509V3err(X509V3_F_X509V3_ADD1_I2D
,
269 X509V3_R_ERROR_CREATING_EXTENSION
);
273 /* If extension exists replace it.. */
275 extmp
= sk_X509_EXTENSION_value(*x
, extidx
);
276 X509_EXTENSION_free(extmp
);
277 if (!sk_X509_EXTENSION_set(*x
, extidx
, ext
))
284 && (ret
= sk_X509_EXTENSION_new_null()) == NULL
)
286 if (!sk_X509_EXTENSION_push(ret
, ext
))
293 /* X509V3err(X509V3_F_X509V3_ADD1_I2D, ERR_R_MALLOC_FAILURE); */
295 sk_X509_EXTENSION_free(ret
);
296 X509_EXTENSION_free(ext
);
300 if (!(flags
& X509V3_ADD_SILENT
))
301 X509V3err(X509V3_F_X509V3_ADD1_I2D
, errcode
);