1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to.  The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 *    notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 *    notice, this list of conditions and the following disclaimer in the
29 *    documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 *    must display the following acknowledgement:
32 *    "This product includes cryptographic software written by
33 *     Eric Young (eay@cryptsoft.com)"
34 *    The word 'cryptographic' can be left out if the rouines from the library
35 *    being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 *    the apps directory (application code) you must include an acknowledgement:
38 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed.  i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57#include <openssl/asn1.h>
58#include <openssl/err.h>
59#include <openssl/evp.h>
60#include <openssl/obj.h>
61#include <openssl/stack.h>
62#include <openssl/x509.h>
63#include <openssl/x509v3.h>
64
65int X509v3_get_ext_count(const STACK_OF(X509_EXTENSION) *x)
66{
67    if (x == NULL)
68        return (0);
69    return (sk_X509_EXTENSION_num(x));
70}
71
72int X509v3_get_ext_by_NID(const STACK_OF(X509_EXTENSION) *x, int nid,
73                          int lastpos)
74{
75    const ASN1_OBJECT *obj;
76
77    obj = OBJ_nid2obj(nid);
78    if (obj == NULL)
79        return (-2);
80    return (X509v3_get_ext_by_OBJ(x, obj, lastpos));
81}
82
83int X509v3_get_ext_by_OBJ(const STACK_OF(X509_EXTENSION) *sk,
84                          const ASN1_OBJECT *obj, int lastpos)
85{
86    int n;
87    X509_EXTENSION *ex;
88
89    if (sk == NULL)
90        return (-1);
91    lastpos++;
92    if (lastpos < 0)
93        lastpos = 0;
94    n = sk_X509_EXTENSION_num(sk);
95    for (; lastpos < n; lastpos++) {
96        ex = sk_X509_EXTENSION_value(sk, lastpos);
97        if (OBJ_cmp(ex->object, obj) == 0)
98            return (lastpos);
99    }
100    return (-1);
101}
102
103int X509v3_get_ext_by_critical(const STACK_OF(X509_EXTENSION) *sk, int crit,
104                               int lastpos)
105{
106    int n;
107    X509_EXTENSION *ex;
108
109    if (sk == NULL)
110        return (-1);
111    lastpos++;
112    if (lastpos < 0)
113        lastpos = 0;
114    n = sk_X509_EXTENSION_num(sk);
115    for (; lastpos < n; lastpos++) {
116        ex = sk_X509_EXTENSION_value(sk, lastpos);
117        if (((ex->critical > 0) && crit) || ((ex->critical <= 0) && !crit))
118            return (lastpos);
119    }
120    return (-1);
121}
122
123X509_EXTENSION *X509v3_get_ext(const STACK_OF(X509_EXTENSION) *x, int loc)
124{
125    if (x == NULL || loc < 0 || sk_X509_EXTENSION_num(x) <= (size_t)loc)
126        return NULL;
127    else
128        return sk_X509_EXTENSION_value(x, loc);
129}
130
131X509_EXTENSION *X509v3_delete_ext(STACK_OF(X509_EXTENSION) *x, int loc)
132{
133    X509_EXTENSION *ret;
134
135    if (x == NULL || loc < 0 || sk_X509_EXTENSION_num(x) <= (size_t)loc)
136        return (NULL);
137    ret = sk_X509_EXTENSION_delete(x, loc);
138    return (ret);
139}
140
141STACK_OF(X509_EXTENSION) *X509v3_add_ext(STACK_OF(X509_EXTENSION) **x,
142                                         X509_EXTENSION *ex, int loc)
143{
144    X509_EXTENSION *new_ex = NULL;
145    int n;
146    STACK_OF(X509_EXTENSION) *sk = NULL;
147
148    if (x == NULL) {
149        OPENSSL_PUT_ERROR(X509, ERR_R_PASSED_NULL_PARAMETER);
150        goto err2;
151    }
152
153    if (*x == NULL) {
154        if ((sk = sk_X509_EXTENSION_new_null()) == NULL)
155            goto err;
156    } else
157        sk = *x;
158
159    n = sk_X509_EXTENSION_num(sk);
160    if (loc > n)
161        loc = n;
162    else if (loc < 0)
163        loc = n;
164
165    if ((new_ex = X509_EXTENSION_dup(ex)) == NULL)
166        goto err2;
167    if (!sk_X509_EXTENSION_insert(sk, new_ex, loc))
168        goto err;
169    if (*x == NULL)
170        *x = sk;
171    return (sk);
172 err:
173    OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
174 err2:
175    if (new_ex != NULL)
176        X509_EXTENSION_free(new_ex);
177    if (sk != NULL)
178        sk_X509_EXTENSION_free(sk);
179    return (NULL);
180}
181
182X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex, int nid,
183                                             int crit,
184                                             ASN1_OCTET_STRING *data)
185{
186    const ASN1_OBJECT *obj;
187    X509_EXTENSION *ret;
188
189    obj = OBJ_nid2obj(nid);
190    if (obj == NULL) {
191        OPENSSL_PUT_ERROR(X509, X509_R_UNKNOWN_NID);
192        return (NULL);
193    }
194    ret = X509_EXTENSION_create_by_OBJ(ex, obj, crit, data);
195    return (ret);
196}
197
198X509_EXTENSION *X509_EXTENSION_create_by_OBJ(X509_EXTENSION **ex,
199                                             const ASN1_OBJECT *obj, int crit,
200                                             ASN1_OCTET_STRING *data)
201{
202    X509_EXTENSION *ret;
203
204    if ((ex == NULL) || (*ex == NULL)) {
205        if ((ret = X509_EXTENSION_new()) == NULL) {
206            OPENSSL_PUT_ERROR(X509, ERR_R_MALLOC_FAILURE);
207            return (NULL);
208        }
209    } else
210        ret = *ex;
211
212    if (!X509_EXTENSION_set_object(ret, obj))
213        goto err;
214    if (!X509_EXTENSION_set_critical(ret, crit))
215        goto err;
216    if (!X509_EXTENSION_set_data(ret, data))
217        goto err;
218
219    if ((ex != NULL) && (*ex == NULL))
220        *ex = ret;
221    return (ret);
222 err:
223    if ((ex == NULL) || (ret != *ex))
224        X509_EXTENSION_free(ret);
225    return (NULL);
226}
227
228int X509_EXTENSION_set_object(X509_EXTENSION *ex, const ASN1_OBJECT *obj)
229{
230    if ((ex == NULL) || (obj == NULL))
231        return (0);
232    ASN1_OBJECT_free(ex->object);
233    ex->object = OBJ_dup(obj);
234    return ex->object != NULL;
235}
236
237int X509_EXTENSION_set_critical(X509_EXTENSION *ex, int crit)
238{
239    if (ex == NULL)
240        return (0);
241    ex->critical = (crit) ? 0xFF : -1;
242    return (1);
243}
244
245int X509_EXTENSION_set_data(X509_EXTENSION *ex, ASN1_OCTET_STRING *data)
246{
247    int i;
248
249    if (ex == NULL)
250        return (0);
251    i = M_ASN1_OCTET_STRING_set(ex->value, data->data, data->length);
252    if (!i)
253        return (0);
254    return (1);
255}
256
257ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex)
258{
259    if (ex == NULL)
260        return (NULL);
261    return (ex->object);
262}
263
264ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ex)
265{
266    if (ex == NULL)
267        return (NULL);
268    return (ex->value);
269}
270
271int X509_EXTENSION_get_critical(X509_EXTENSION *ex)
272{
273    if (ex == NULL)
274        return (0);
275    if (ex->critical > 0)
276        return 1;
277    return 0;
278}
279