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