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
59 #include <limits.h>
60 #include <string.h>
61
62 #include <openssl/err.h>
63 #include <openssl/mem.h>
64 #include <openssl/obj.h>
65
66 #include "../internal.h"
67
68
i2d_ASN1_OBJECT(ASN1_OBJECT * a,unsigned char ** pp)69 int i2d_ASN1_OBJECT(ASN1_OBJECT *a, unsigned char **pp)
70 {
71 unsigned char *p, *allocated = NULL;
72 int objsize;
73
74 if ((a == NULL) || (a->data == NULL))
75 return (0);
76
77 objsize = ASN1_object_size(0, a->length, V_ASN1_OBJECT);
78 if (pp == NULL || objsize == -1)
79 return objsize;
80
81 if (*pp == NULL) {
82 if ((p = allocated = OPENSSL_malloc(objsize)) == NULL) {
83 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
84 return 0;
85 }
86 } else {
87 p = *pp;
88 }
89
90 ASN1_put_object(&p, 0, a->length, V_ASN1_OBJECT, V_ASN1_UNIVERSAL);
91 OPENSSL_memcpy(p, a->data, a->length);
92
93 /*
94 * If a new buffer was allocated, just return it back.
95 * If not, return the incremented buffer pointer.
96 */
97 *pp = allocated != NULL ? allocated : p + a->length;
98 return objsize;
99 }
100
i2t_ASN1_OBJECT(char * buf,int buf_len,ASN1_OBJECT * a)101 int i2t_ASN1_OBJECT(char *buf, int buf_len, ASN1_OBJECT *a)
102 {
103 return OBJ_obj2txt(buf, buf_len, a, 0);
104 }
105
i2a_ASN1_OBJECT(BIO * bp,ASN1_OBJECT * a)106 int i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a)
107 {
108 char buf[80], *p = buf;
109 int i;
110
111 if ((a == NULL) || (a->data == NULL))
112 return (BIO_write(bp, "NULL", 4));
113 i = i2t_ASN1_OBJECT(buf, sizeof buf, a);
114 if (i > (int)(sizeof(buf) - 1)) {
115 p = OPENSSL_malloc(i + 1);
116 if (!p)
117 return -1;
118 i2t_ASN1_OBJECT(p, i + 1, a);
119 }
120 if (i <= 0)
121 return BIO_write(bp, "<INVALID>", 9);
122 BIO_write(bp, p, i);
123 if (p != buf)
124 OPENSSL_free(p);
125 return (i);
126 }
127
d2i_ASN1_OBJECT(ASN1_OBJECT ** a,const unsigned char ** pp,long length)128 ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
129 long length)
130 {
131 const unsigned char *p;
132 long len;
133 int tag, xclass;
134 int inf, i;
135 ASN1_OBJECT *ret = NULL;
136 p = *pp;
137 inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
138 if (inf & 0x80) {
139 i = ASN1_R_BAD_OBJECT_HEADER;
140 goto err;
141 }
142
143 if (tag != V_ASN1_OBJECT) {
144 i = ASN1_R_EXPECTING_AN_OBJECT;
145 goto err;
146 }
147 ret = c2i_ASN1_OBJECT(a, &p, len);
148 if (ret)
149 *pp = p;
150 return ret;
151 err:
152 OPENSSL_PUT_ERROR(ASN1, i);
153 return (NULL);
154 }
155
c2i_ASN1_OBJECT(ASN1_OBJECT ** a,const unsigned char ** pp,long len)156 ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
157 long len)
158 {
159 ASN1_OBJECT *ret = NULL;
160 const unsigned char *p;
161 unsigned char *data;
162 int i, length;
163
164 /*
165 * Sanity check OID encoding. Need at least one content octet. MSB must
166 * be clear in the last octet. can't have leading 0x80 in subidentifiers,
167 * see: X.690 8.19.2
168 */
169 if (len <= 0 || len > INT_MAX || pp == NULL || (p = *pp) == NULL ||
170 p[len - 1] & 0x80) {
171 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_OBJECT_ENCODING);
172 return NULL;
173 }
174 /* Now 0 < len <= INT_MAX, so the cast is safe. */
175 length = (int)len;
176 for (i = 0; i < length; i++, p++) {
177 if (*p == 0x80 && (!i || !(p[-1] & 0x80))) {
178 OPENSSL_PUT_ERROR(ASN1, ASN1_R_INVALID_OBJECT_ENCODING);
179 return NULL;
180 }
181 }
182
183 /*
184 * only the ASN1_OBJECTs from the 'table' will have values for ->sn or
185 * ->ln
186 */
187 if ((a == NULL) || ((*a) == NULL) ||
188 !((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC)) {
189 if ((ret = ASN1_OBJECT_new()) == NULL)
190 return (NULL);
191 } else
192 ret = (*a);
193
194 p = *pp;
195 /* detach data from object */
196 data = (unsigned char *)ret->data;
197 ret->data = NULL;
198 /* once detached we can change it */
199 if ((data == NULL) || (ret->length < length)) {
200 ret->length = 0;
201 if (data != NULL)
202 OPENSSL_free(data);
203 data = (unsigned char *)OPENSSL_malloc(length);
204 if (data == NULL) {
205 i = ERR_R_MALLOC_FAILURE;
206 goto err;
207 }
208 ret->flags |= ASN1_OBJECT_FLAG_DYNAMIC_DATA;
209 }
210 OPENSSL_memcpy(data, p, length);
211 /* reattach data to object, after which it remains const */
212 ret->data = data;
213 ret->length = length;
214 ret->sn = NULL;
215 ret->ln = NULL;
216 /* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
217 p += length;
218
219 if (a != NULL)
220 (*a) = ret;
221 *pp = p;
222 return (ret);
223 err:
224 OPENSSL_PUT_ERROR(ASN1, i);
225 if ((ret != NULL) && ((a == NULL) || (*a != ret)))
226 ASN1_OBJECT_free(ret);
227 return (NULL);
228 }
229
ASN1_OBJECT_new(void)230 ASN1_OBJECT *ASN1_OBJECT_new(void)
231 {
232 ASN1_OBJECT *ret;
233
234 ret = (ASN1_OBJECT *)OPENSSL_malloc(sizeof(ASN1_OBJECT));
235 if (ret == NULL) {
236 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
237 return (NULL);
238 }
239 ret->length = 0;
240 ret->data = NULL;
241 ret->nid = 0;
242 ret->sn = NULL;
243 ret->ln = NULL;
244 ret->flags = ASN1_OBJECT_FLAG_DYNAMIC;
245 return (ret);
246 }
247
ASN1_OBJECT_free(ASN1_OBJECT * a)248 void ASN1_OBJECT_free(ASN1_OBJECT *a)
249 {
250 if (a == NULL)
251 return;
252 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS) {
253 #ifndef CONST_STRICT /* disable purely for compile-time strict
254 * const checking. Doing this on a "real"
255 * compile will cause memory leaks */
256 if (a->sn != NULL)
257 OPENSSL_free((void *)a->sn);
258 if (a->ln != NULL)
259 OPENSSL_free((void *)a->ln);
260 #endif
261 a->sn = a->ln = NULL;
262 }
263 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA) {
264 if (a->data != NULL)
265 OPENSSL_free((void *)a->data);
266 a->data = NULL;
267 a->length = 0;
268 }
269 if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
270 OPENSSL_free(a);
271 }
272
ASN1_OBJECT_create(int nid,unsigned char * data,int len,const char * sn,const char * ln)273 ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, int len,
274 const char *sn, const char *ln)
275 {
276 ASN1_OBJECT o;
277
278 o.sn = sn;
279 o.ln = ln;
280 o.data = data;
281 o.nid = nid;
282 o.length = len;
283 o.flags = ASN1_OBJECT_FLAG_DYNAMIC | ASN1_OBJECT_FLAG_DYNAMIC_STRINGS |
284 ASN1_OBJECT_FLAG_DYNAMIC_DATA;
285 return (OBJ_dup(&o));
286 }
287