x509_v3.c revision 296465 
1/* crypto/x509/x509_v3.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include <openssl/stack.h>
61#include "cryptlib.h"
62#include <openssl/asn1.h>
63#include <openssl/objects.h>
64#include <openssl/evp.h>
65#include <openssl/x509.h>
66#include <openssl/x509v3.h>
67
68int X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *x)
69{
70    if (x == NULL)
71        return (0);
72    return (sk_X509_EXTENSION_num(x));
73}
74
75int X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *x, int nid,
76                          int lastpos)
77{
78    ASN1_OBJECT *obj;
79
80    obj = OBJ_nid2obj(nid);
81    if (obj == NULL)
82        return (-2);
83    return (X509v3_get_ext_by_OBJ(x, obj, lastpos));
84}
85
86int X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *sk,
87                          ASN1_OBJECT *obj, int lastpos)
88{
89    int n;
90    X509_EXTENSION *ex;
91
92    if (sk == NULL)
93        return (-1);
94    lastpos++;
95    if (lastpos < 0)
96        lastpos = 0;
97    n = sk_X509_EXTENSION_num(sk);
98    for (; lastpos < n; lastpos++) {
99        ex = sk_X509_EXTENSION_value(sk, lastpos);
100        if (OBJ_cmp(ex->object, obj) == 0)
101            return (lastpos);
102    }
103    return (-1);
104}
105
106int X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *sk, int crit,
107                               int lastpos)
108{
109    int n;
110    X509_EXTENSION *ex;
111
112    if (sk == NULL)
113        return (-1);
114    lastpos++;
115    if (lastpos < 0)
116        lastpos = 0;
117    n = sk_X509_EXTENSION_num(sk);
118    for (; lastpos < n; lastpos++) {
119        ex = sk_X509_EXTENSION_value(sk, lastpos);
120        if (((ex->critical > 0) && crit) || ((ex->critical <= 0) && !crit))
121            return (lastpos);
122    }
123    return (-1);
124}
125
126X509_EXTENSION *X509v3_get_ext(const STACK_OF(X509_EXTENSION) *x, int loc)
127{
128    if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)
129        return NULL;
130    else
131        return sk_X509_EXTENSION_value(x, loc);
132}
133
134X509_EXTENSION *X509v3_delete_ext(STACK_OF(X509_EXTENSION) *x, int loc)
135{
136    X509_EXTENSION *ret;
137
138    if (x == NULL || sk_X509_EXTENSION_num(x) <= loc || loc < 0)
139        return (NULL);
140    ret = sk_X509_EXTENSION_delete(x, loc);
141    return (ret);
142}
143
144STACK_OF(X509_EXTENSION) *X509v3_add_ext(STACK_OF(X509_EXTENSION) **x,
145                                         X509_EXTENSION *ex, int loc)
146{
147    X509_EXTENSION *new_ex = NULL;
148    int n;
149    STACK_OF(X509_EXTENSION) *sk = NULL;
150
151    if (x == NULL) {
152        X509err(X509_F_X509V3_ADD_EXT, ERR_R_PASSED_NULL_PARAMETER);
153        goto err2;
154    }
155
156    if (*x == NULL) {
157        if ((sk = sk_X509_EXTENSION_new_null()) == NULL)
158            goto err;
159    } else
160        sk = *x;
161
162    n = sk_X509_EXTENSION_num(sk);
163    if (loc > n)
164        loc = n;
165    else if (loc < 0)
166        loc = n;
167
168    if ((new_ex = X509_EXTENSION_dup(ex)) == NULL)
169        goto err2;
170    if (!sk_X509_EXTENSION_insert(sk, new_ex, loc))
171        goto err;
172    if (*x == NULL)
173        *x = sk;
174    return (sk);
175 err:
176    X509err(X509_F_X509V3_ADD_EXT, ERR_R_MALLOC_FAILURE);
177 err2:
178    if (new_ex != NULL)
179        X509_EXTENSION_free(new_ex);
180    if (sk != NULL)
181        sk_X509_EXTENSION_free(sk);
182    return (NULL);
183}
184
185X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, int nid,
186                                             int crit,
187                                             ASN1_OCTET_STRING *data)
188{
189    ASN1_OBJECT *obj;
190    X509_EXTENSION *ret;
191
192    obj = OBJ_nid2obj(nid);
193    if (obj == NULL) {
194        X509err(X509_F_X509_EXTENSION_CREATE_BY_NID, X509_R_UNKNOWN_NID);
195        return (NULL);
196    }
197    ret = X509_EXTENSION_create_by_OBJ(ex, obj, crit, data);
198    if (ret == NULL)
199        ASN1_OBJECT_free(obj);
200    return (ret);
201}
202
203X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
204                                             ASN1_OBJECT *obj, int crit,
205                                             ASN1_OCTET_STRING *data)
206{
207    X509_EXTENSION *ret;
208
209    if ((ex == NULL) || (*ex == NULL)) {
210        if ((ret = X509_EXTENSION_new()) == NULL) {
211            X509err(X509_F_X509_EXTENSION_CREATE_BY_OBJ,
212                    ERR_R_MALLOC_FAILURE);
213            return (NULL);
214        }
215    } else
216        ret = *ex;
217
218    if (!X509_EXTENSION_set_object(ret, obj))
219        goto err;
220    if (!X509_EXTENSION_set_critical(ret, crit))
221        goto err;
222    if (!X509_EXTENSION_set_data(ret, data))
223        goto err;
224
225    if ((ex != NULL) && (*ex == NULL))
226        *ex = ret;
227    return (ret);
228 err:
229    if ((ex == NULL) || (ret != *ex))
230        X509_EXTENSION_free(ret);
231    return (NULL);
232}
233
234int X509_EXTENSION_set_object(X509_EXTENSION *ex, ASN1_OBJECT *obj)
235{
236    if ((ex == NULL) || (obj == NULL))
237        return (0);
238    ASN1_OBJECT_free(ex->object);
239    ex->object = OBJ_dup(obj);
240    return (1);
241}
242
243int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit)
244{
245    if (ex == NULL)
246        return (0);
247    ex->critical = (crit) ? 0xFF : -1;
248    return (1);
249}
250
251int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data)
252{
253    int i;
254
255    if (ex == NULL)
256        return (0);
257    i = M_ASN1_OCTET_STRING_set(ex->value, data->data, data->length);
258    if (!i)
259        return (0);
260    return (1);
261}
262
263ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex)
264{
265    if (ex == NULL)
266        return (NULL);
267    return (ex->object);
268}
269
270ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ex)
271{
272    if (ex == NULL)
273        return (NULL);
274    return (ex->value);
275}
276
277int X509_EXTENSION_get_critical(X509_EXTENSION *ex)
278{
279    if (ex == NULL)
280        return (0);
281    if (ex->critical > 0)
282        return 1;
283    return 0;
284}
285