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[thirdparty/openssl.git] / crypto / asn1 / a_bytes.c
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d02b48c6 1/* crypto/asn1/a_bytes.c */
58964a49 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6
RE
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 "cryptlib.h"
9d6b1ce6 61#include <openssl/asn1.h>
d02b48c6 62
d02b48c6 63static unsigned long tag2bit[32]={
58964a49 640, 0, 0, B_ASN1_BIT_STRING, /* tags 0 - 3 */
d02b48c6
RE
65B_ASN1_OCTET_STRING, 0, 0, B_ASN1_UNKNOWN,/* tags 4- 7 */
66B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN,/* tags 8-11 */
d77b3054 67B_ASN1_UTF8STRING,B_ASN1_UNKNOWN,B_ASN1_UNKNOWN,B_ASN1_UNKNOWN,/* tags 12-15 */
9d6b1ce6
DSH
680, 0, B_ASN1_NUMERICSTRING,B_ASN1_PRINTABLESTRING, /* tags 16-19 */
69B_ASN1_T61STRING,B_ASN1_VIDEOTEXSTRING,B_ASN1_IA5STRING, /* tags 20-22 */
70B_ASN1_UTCTIME, B_ASN1_GENERALIZEDTIME, /* tags 23-24 */
71B_ASN1_GRAPHICSTRING,B_ASN1_ISO64STRING,B_ASN1_GENERALSTRING, /* tags 25-27 */
72B_ASN1_UNIVERSALSTRING,B_ASN1_UNKNOWN,B_ASN1_BMPSTRING,B_ASN1_UNKNOWN, /* tags 28-31 */
d02b48c6
RE
73 };
74
9d6b1ce6
DSH
75unsigned long ASN1_tag2bit(int tag)
76{
77 if((tag < 0) || (tag > 30)) return 0;
78 return tag2bit[tag];
79}
80
657e60fa 81static int asn1_collate_primitive(ASN1_STRING *a, ASN1_CTX *c);
d77b3054 82/* type is a 'bitmap' of acceptable string types.
d02b48c6 83 */
6b691a5c
UM
84ASN1_STRING *d2i_ASN1_type_bytes(ASN1_STRING **a, unsigned char **pp,
85 long length, int type)
d02b48c6
RE
86 {
87 ASN1_STRING *ret=NULL;
88 unsigned char *p,*s;
89 long len;
90 int inf,tag,xclass;
91 int i=0;
92
d02b48c6
RE
93 p= *pp;
94 inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
95 if (inf & 0x80) goto err;
96
97 if (tag >= 32)
98 {
99 i=ASN1_R_TAG_VALUE_TOO_HIGH;;
100 goto err;
101 }
102 if (!(tag2bit[tag] & type))
103 {
104 i=ASN1_R_WRONG_TYPE;
105 goto err;
106 }
58964a49
RE
107
108 /* If a bit-string, exit early */
109 if (tag == V_ASN1_BIT_STRING)
110 return(d2i_ASN1_BIT_STRING(a,pp,length));
111
112 if ((a == NULL) || ((*a) == NULL))
113 {
114 if ((ret=ASN1_STRING_new()) == NULL) return(NULL);
115 }
116 else
117 ret=(*a);
118
d02b48c6
RE
119 if (len != 0)
120 {
26a3a48d 121 s=(unsigned char *)OPENSSL_malloc((int)len+1);
d02b48c6
RE
122 if (s == NULL)
123 {
124 i=ERR_R_MALLOC_FAILURE;
125 goto err;
126 }
127 memcpy(s,p,(int)len);
128 s[len]='\0';
129 p+=len;
130 }
131 else
132 s=NULL;
133
26a3a48d 134 if (ret->data != NULL) OPENSSL_free(ret->data);
d02b48c6
RE
135 ret->length=(int)len;
136 ret->data=s;
137 ret->type=tag;
138 if (a != NULL) (*a)=ret;
139 *pp=p;
140 return(ret);
141err:
142 ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES,i);
143 if ((ret != NULL) && ((a == NULL) || (*a != ret)))
144 ASN1_STRING_free(ret);
145 return(NULL);
146 }
147
6b691a5c 148int i2d_ASN1_bytes(ASN1_STRING *a, unsigned char **pp, int tag, int xclass)
d02b48c6
RE
149 {
150 int ret,r,constructed;
151 unsigned char *p;
152
153 if (a == NULL) return(0);
58964a49
RE
154
155 if (tag == V_ASN1_BIT_STRING)
156 return(i2d_ASN1_BIT_STRING(a,pp));
157
d02b48c6
RE
158 ret=a->length;
159 r=ASN1_object_size(0,ret,tag);
160 if (pp == NULL) return(r);
161 p= *pp;
162
163 if ((tag == V_ASN1_SEQUENCE) || (tag == V_ASN1_SET))
164 constructed=1;
165 else
166 constructed=0;
167 ASN1_put_object(&p,constructed,ret,tag,xclass);
168 memcpy(p,a->data,a->length);
169 p+=a->length;
170 *pp= p;
171 return(r);
172 }
173
6b691a5c
UM
174ASN1_STRING *d2i_ASN1_bytes(ASN1_STRING **a, unsigned char **pp, long length,
175 int Ptag, int Pclass)
d02b48c6
RE
176 {
177 ASN1_STRING *ret=NULL;
178 unsigned char *p,*s;
179 long len;
180 int inf,tag,xclass;
181 int i=0;
182
183 if ((a == NULL) || ((*a) == NULL))
184 {
185 if ((ret=ASN1_STRING_new()) == NULL) return(NULL);
186 }
187 else
188 ret=(*a);
189
190 p= *pp;
191 inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
192 if (inf & 0x80)
193 {
194 i=ASN1_R_BAD_OBJECT_HEADER;
195 goto err;
196 }
197
198 if (tag != Ptag)
199 {
200 i=ASN1_R_WRONG_TAG;
201 goto err;
202 }
203
204 if (inf & V_ASN1_CONSTRUCTED)
205 {
206 ASN1_CTX c;
207
208 c.pp=pp;
209 c.p=p;
210 c.inf=inf;
211 c.slen=len;
212 c.tag=Ptag;
213 c.xclass=Pclass;
214 c.max=(length == 0)?0:(p+length);
657e60fa 215 if (!asn1_collate_primitive(ret,&c))
d02b48c6
RE
216 goto err;
217 else
218 {
219 p=c.p;
220 }
221 }
222 else
223 {
224 if (len != 0)
225 {
58964a49 226 if ((ret->length < len) || (ret->data == NULL))
d02b48c6 227 {
26a3a48d
RL
228 if (ret->data != NULL) OPENSSL_free(ret->data);
229 s=(unsigned char *)OPENSSL_malloc((int)len + 1);
d02b48c6
RE
230 if (s == NULL)
231 {
232 i=ERR_R_MALLOC_FAILURE;
233 goto err;
234 }
235 }
236 else
237 s=ret->data;
238 memcpy(s,p,(int)len);
393f2c65 239 s[len] = '\0';
d02b48c6
RE
240 p+=len;
241 }
242 else
243 {
244 s=NULL;
26a3a48d 245 if (ret->data != NULL) OPENSSL_free(ret->data);
d02b48c6
RE
246 }
247
248 ret->length=(int)len;
249 ret->data=s;
250 ret->type=Ptag;
251 }
252
253 if (a != NULL) (*a)=ret;
254 *pp=p;
255 return(ret);
256err:
257 if ((ret != NULL) && ((a == NULL) || (*a != ret)))
258 ASN1_STRING_free(ret);
259 ASN1err(ASN1_F_D2I_ASN1_BYTES,i);
260 return(NULL);
261 }
262
263
657e60fa
UM
264/* We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapse
265 * them into the one structure that is then returned */
d02b48c6
RE
266/* There have been a few bug fixes for this function from
267 * Paul Keogh <paul.keogh@sse.ie>, many thanks to him */
657e60fa 268static int asn1_collate_primitive(ASN1_STRING *a, ASN1_CTX *c)
d02b48c6
RE
269 {
270 ASN1_STRING *os=NULL;
271 BUF_MEM b;
272 int num;
273
274 b.length=0;
275 b.max=0;
276 b.data=NULL;
277
278 if (a == NULL)
279 {
280 c->error=ERR_R_PASSED_NULL_PARAMETER;
281 goto err;
282 }
283
284 num=0;
285 for (;;)
286 {
287 if (c->inf & 1)
288 {
289 c->eos=ASN1_check_infinite_end(&c->p,
290 (long)(c->max-c->p));
291 if (c->eos) break;
292 }
293 else
294 {
295 if (c->slen <= 0) break;
296 }
297
298 c->q=c->p;
299 if (d2i_ASN1_bytes(&os,&c->p,c->max-c->p,c->tag,c->xclass)
300 == NULL)
301 {
302 c->error=ERR_R_ASN1_LIB;
303 goto err;
304 }
305
306 if (!BUF_MEM_grow(&b,num+os->length))
307 {
308 c->error=ERR_R_BUF_LIB;
309 goto err;
310 }
311 memcpy(&(b.data[num]),os->data,os->length);
312 if (!(c->inf & 1))
313 c->slen-=(c->p-c->q);
314 num+=os->length;
315 }
316
317 if (!asn1_Finish(c)) goto err;
318
319 a->length=num;
26a3a48d 320 if (a->data != NULL) OPENSSL_free(a->data);
d02b48c6
RE
321 a->data=(unsigned char *)b.data;
322 if (os != NULL) ASN1_STRING_free(os);
323 return(1);
324err:
5d818c30 325 ASN1err(ASN1_F_ASN1_COLLATE_PRIMITIVE,c->error);
d02b48c6 326 if (os != NULL) ASN1_STRING_free(os);
26a3a48d 327 if (b.data != NULL) OPENSSL_free(b.data);
d02b48c6
RE
328 return(0);
329 }
330