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diff --git a/src/lib/libcrypto/asn1/a_bytes.c b/src/lib/libcrypto/asn1/a_bytes.c
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1/* $OpenBSD: a_bytes.c,v 1.19 2017/01/29 17:49:22 beck Exp $ */
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 <string.h>
61
62#include <openssl/asn1.h>
63#include <openssl/buffer.h>
64#include <openssl/err.h>
65
66static int asn1_collate_primitive(ASN1_STRING *a, ASN1_const_CTX *c);
67/* type is a 'bitmap' of acceptable string types.
68 */
69ASN1_STRING *
70d2i_ASN1_type_bytes(ASN1_STRING **a, const unsigned char **pp,
71 long length, int type)
72{
73 ASN1_STRING *ret = NULL;
74 const unsigned char *p;
75 unsigned char *s;
76 long len;
77 int inf, tag, xclass;
78 int i = 0;
79
80 p = *pp;
81 inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
82 if (inf & 0x80)
83 goto err;
84
85 if (tag >= 32) {
86 i = ASN1_R_TAG_VALUE_TOO_HIGH;
87 goto err;
88 }
89 if (!(ASN1_tag2bit(tag) & type)) {
90 i = ASN1_R_WRONG_TYPE;
91 goto err;
92 }
93
94 /* If a bit-string, exit early */
95 if (tag == V_ASN1_BIT_STRING)
96 return (d2i_ASN1_BIT_STRING(a, pp, length));
97
98 if ((a == NULL) || ((*a) == NULL)) {
99 if ((ret = ASN1_STRING_new()) == NULL)
100 return (NULL);
101 } else
102 ret = (*a);
103
104 if (len != 0) {
105 s = malloc(len + 1);
106 if (s == NULL) {
107 i = ERR_R_MALLOC_FAILURE;
108 goto err;
109 }
110 memcpy(s, p, len);
111 s[len]='\0';
112 p += len;
113 } else
114 s = NULL;
115
116 free(ret->data);
117 ret->length = (int)len;
118 ret->data = s;
119 ret->type = tag;
120 if (a != NULL)
121 (*a) = ret;
122 *pp = p;
123 return (ret);
124
125err:
126 ASN1error(i);
127 if (a == NULL || *a != ret)
128 ASN1_STRING_free(ret);
129 return (NULL);
130}
131
132int
133i2d_ASN1_bytes(ASN1_STRING *a, unsigned char **pp, int tag, int xclass)
134{
135 int ret, r, constructed;
136 unsigned char *p;
137
138 if (a == NULL)
139 return (0);
140
141 if (tag == V_ASN1_BIT_STRING)
142 return (i2d_ASN1_BIT_STRING(a, pp));
143
144 ret = a->length;
145 r = ASN1_object_size(0, ret, tag);
146 if (pp == NULL)
147 return (r);
148 p = *pp;
149
150 if ((tag == V_ASN1_SEQUENCE) || (tag == V_ASN1_SET))
151 constructed = 1;
152 else
153 constructed = 0;
154 ASN1_put_object(&p, constructed, ret, tag, xclass);
155 memcpy(p, a->data, a->length);
156 p += a->length;
157 *pp = p;
158 return (r);
159}
160
161ASN1_STRING *
162d2i_ASN1_bytes(ASN1_STRING **a, const unsigned char **pp,
163 long length, int Ptag, int Pclass)
164{
165 ASN1_STRING *ret = NULL;
166 const unsigned char *p;
167 unsigned char *s;
168 long len;
169 int inf, tag, xclass;
170 int i = 0;
171
172 if ((a == NULL) || ((*a) == NULL)) {
173 if ((ret = ASN1_STRING_new()) == NULL)
174 return (NULL);
175 } else
176 ret = (*a);
177
178 p= *pp;
179 inf = ASN1_get_object(&p, &len, &tag, &xclass, length);
180 if (inf & 0x80) {
181 i = ASN1_R_BAD_OBJECT_HEADER;
182 goto err;
183 }
184
185 if (tag != Ptag) {
186 i = ASN1_R_WRONG_TAG;
187 goto err;
188 }
189
190 if (inf & V_ASN1_CONSTRUCTED) {
191 ASN1_const_CTX c;
192
193 c.pp = pp;
194 c.p = p;
195 c.inf = inf;
196 c.slen = len;
197 c.tag = Ptag;
198 c.xclass = Pclass;
199 c.max = (length == 0) ? 0 : (p + length);
200 if (!asn1_collate_primitive(ret, &c))
201 goto err;
202 else {
203 p = c.p;
204 }
205 } else {
206 if (len != 0) {
207 if ((ret->length < len) || (ret->data == NULL)) {
208 free(ret->data);
209 ret->data = NULL;
210 s = malloc(len + 1);
211 if (s == NULL) {
212 i = ERR_R_MALLOC_FAILURE;
213 goto err;
214 }
215 } else
216 s = ret->data;
217 memcpy(s, p, len);
218 s[len] = '\0';
219 p += len;
220 } else {
221 s = NULL;
222 free(ret->data);
223 }
224
225 ret->length = (int)len;
226 ret->data = s;
227 ret->type = Ptag;
228 }
229
230 if (a != NULL)
231 (*a) = ret;
232 *pp = p;
233 return (ret);
234
235err:
236 if (a == NULL || *a != ret)
237 ASN1_STRING_free(ret);
238 ASN1error(i);
239 return (NULL);
240}
241
242
243/* We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapse
244 * them into the one structure that is then returned */
245/* There have been a few bug fixes for this function from
246 * Paul Keogh <paul.keogh@sse.ie>, many thanks to him */
247static int
248asn1_collate_primitive(ASN1_STRING *a, ASN1_const_CTX *c)
249{
250 ASN1_STRING *os = NULL;
251 BUF_MEM b;
252 int num;
253
254 b.length = 0;
255 b.max = 0;
256 b.data = NULL;
257
258 if (a == NULL) {
259 c->error = ERR_R_PASSED_NULL_PARAMETER;
260 goto err;
261 }
262
263 num = 0;
264 for (;;) {
265 if (c->inf & 1) {
266 c->eos = ASN1_const_check_infinite_end(&c->p,
267 (long)(c->max - c->p));
268 if (c->eos)
269 break;
270 } else {
271 if (c->slen <= 0)
272 break;
273 }
274
275 c->q = c->p;
276 if (d2i_ASN1_bytes(&os, &c->p, c->max - c->p, c->tag,
277 c->xclass) == NULL) {
278 c->error = ERR_R_ASN1_LIB;
279 goto err;
280 }
281
282 if (!BUF_MEM_grow_clean(&b, num + os->length)) {
283 c->error = ERR_R_BUF_LIB;
284 goto err;
285 }
286 memcpy(&(b.data[num]), os->data, os->length);
287 if (!(c->inf & 1))
288 c->slen -= (c->p - c->q);
289 num += os->length;
290 }
291
292 if (!asn1_const_Finish(c))
293 goto err;
294
295 a->length = num;
296 free(a->data);
297 a->data = (unsigned char *)b.data;
298 ASN1_STRING_free(os);
299 return (1);
300
301err:
302 ASN1error(c->error);
303 ASN1_STRING_free(os);
304 free(b.data);
305 return (0);
306}
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