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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 
X509v3_get_ext_count(const STACK_OF (X509_EXTENSION)* x)65 int 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 
X509v3_get_ext_by_NID(const STACK_OF (X509_EXTENSION)* x,int nid,int lastpos)72 int 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 
X509v3_get_ext_by_OBJ(const STACK_OF (X509_EXTENSION)* sk,const ASN1_OBJECT * obj,int lastpos)83 int 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 
X509v3_get_ext_by_critical(const STACK_OF (X509_EXTENSION)* sk,int crit,int lastpos)103 int 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 
X509v3_get_ext(const STACK_OF (X509_EXTENSION)* x,int loc)123 X509_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 
X509v3_delete_ext(STACK_OF (X509_EXTENSION)* x,int loc)131 X509_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 
STACK_OF(X509_EXTENSION)141 STACK_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 
X509_EXTENSION_create_by_NID(X509_EXTENSION ** ex,int nid,int crit,ASN1_OCTET_STRING * data)182 X509_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 
X509_EXTENSION_create_by_OBJ(X509_EXTENSION ** ex,const ASN1_OBJECT * obj,int crit,ASN1_OCTET_STRING * data)198 X509_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 
X509_EXTENSION_set_object(X509_EXTENSION * ex,const ASN1_OBJECT * obj)228 int 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 
X509_EXTENSION_set_critical(X509_EXTENSION * ex,int crit)237 int 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 
X509_EXTENSION_set_data(X509_EXTENSION * ex,ASN1_OCTET_STRING * data)245 int 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 
X509_EXTENSION_get_object(X509_EXTENSION * ex)257 ASN1_OBJECT *X509_EXTENSION_get_object(X509_EXTENSION *ex)
258 {
259     if (ex == NULL)
260         return (NULL);
261     return (ex->object);
262 }
263 
X509_EXTENSION_get_data(X509_EXTENSION * ex)264 ASN1_OCTET_STRING *X509_EXTENSION_get_data(X509_EXTENSION *ex)
265 {
266     if (ex == NULL)
267         return (NULL);
268     return (ex->value);
269 }
270 
X509_EXTENSION_get_critical(X509_EXTENSION * ex)271 int 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