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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" | |
61 | #include "asn1_mac.h" | |
62 | ||
dfeab068 | 63 | /* ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES,ASN1_R_WRONG_TYPE); |
d02b48c6 RE |
64 | * ASN1err(ASN1_F_ASN1_COLLATE_PRIMATIVE,ASN1_R_WRONG_TAG); |
65 | */ | |
66 | ||
67 | static unsigned long tag2bit[32]={ | |
58964a49 | 68 | 0, 0, 0, B_ASN1_BIT_STRING, /* tags 0 - 3 */ |
d02b48c6 RE |
69 | B_ASN1_OCTET_STRING, 0, 0, B_ASN1_UNKNOWN,/* tags 4- 7 */ |
70 | B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN,/* tags 8-11 */ | |
d77b3054 | 71 | B_ASN1_UTF8STRING,B_ASN1_UNKNOWN,B_ASN1_UNKNOWN,B_ASN1_UNKNOWN,/* tags 12-15 */ |
d02b48c6 RE |
72 | 0, 0, B_ASN1_NUMERICSTRING,B_ASN1_PRINTABLESTRING, |
73 | B_ASN1_T61STRING,B_ASN1_VIDEOTEXSTRING,B_ASN1_IA5STRING,0, | |
74 | 0,B_ASN1_GRAPHICSTRING,B_ASN1_ISO64STRING,B_ASN1_GENERALSTRING, | |
58964a49 | 75 | B_ASN1_UNIVERSALSTRING,B_ASN1_UNKNOWN,B_ASN1_BMPSTRING,B_ASN1_UNKNOWN, |
d02b48c6 RE |
76 | }; |
77 | ||
78 | #ifndef NOPROTO | |
79 | static int asn1_collate_primative(ASN1_STRING *a, ASN1_CTX *c); | |
80 | #else | |
81 | static int asn1_collate_primative(); | |
82 | #endif | |
83 | ||
d77b3054 | 84 | /* type is a 'bitmap' of acceptable string types. |
d02b48c6 | 85 | */ |
6b691a5c UM |
86 | ASN1_STRING *d2i_ASN1_type_bytes(ASN1_STRING **a, unsigned char **pp, |
87 | long length, int type) | |
d02b48c6 RE |
88 | { |
89 | ASN1_STRING *ret=NULL; | |
90 | unsigned char *p,*s; | |
91 | long len; | |
92 | int inf,tag,xclass; | |
93 | int i=0; | |
94 | ||
d02b48c6 RE |
95 | p= *pp; |
96 | inf=ASN1_get_object(&p,&len,&tag,&xclass,length); | |
97 | if (inf & 0x80) goto err; | |
98 | ||
99 | if (tag >= 32) | |
100 | { | |
101 | i=ASN1_R_TAG_VALUE_TOO_HIGH;; | |
102 | goto err; | |
103 | } | |
104 | if (!(tag2bit[tag] & type)) | |
105 | { | |
106 | i=ASN1_R_WRONG_TYPE; | |
107 | goto err; | |
108 | } | |
58964a49 RE |
109 | |
110 | /* If a bit-string, exit early */ | |
111 | if (tag == V_ASN1_BIT_STRING) | |
112 | return(d2i_ASN1_BIT_STRING(a,pp,length)); | |
113 | ||
114 | if ((a == NULL) || ((*a) == NULL)) | |
115 | { | |
116 | if ((ret=ASN1_STRING_new()) == NULL) return(NULL); | |
117 | } | |
118 | else | |
119 | ret=(*a); | |
120 | ||
d02b48c6 RE |
121 | if (len != 0) |
122 | { | |
123 | s=(unsigned char *)Malloc((int)len+1); | |
124 | if (s == NULL) | |
125 | { | |
126 | i=ERR_R_MALLOC_FAILURE; | |
127 | goto err; | |
128 | } | |
129 | memcpy(s,p,(int)len); | |
130 | s[len]='\0'; | |
131 | p+=len; | |
132 | } | |
133 | else | |
134 | s=NULL; | |
135 | ||
136 | if (ret->data != NULL) Free((char *)ret->data); | |
137 | ret->length=(int)len; | |
138 | ret->data=s; | |
139 | ret->type=tag; | |
140 | if (a != NULL) (*a)=ret; | |
141 | *pp=p; | |
142 | return(ret); | |
143 | err: | |
144 | ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES,i); | |
145 | if ((ret != NULL) && ((a == NULL) || (*a != ret))) | |
146 | ASN1_STRING_free(ret); | |
147 | return(NULL); | |
148 | } | |
149 | ||
6b691a5c | 150 | int i2d_ASN1_bytes(ASN1_STRING *a, unsigned char **pp, int tag, int xclass) |
d02b48c6 RE |
151 | { |
152 | int ret,r,constructed; | |
153 | unsigned char *p; | |
154 | ||
155 | if (a == NULL) return(0); | |
58964a49 RE |
156 | |
157 | if (tag == V_ASN1_BIT_STRING) | |
158 | return(i2d_ASN1_BIT_STRING(a,pp)); | |
159 | ||
d02b48c6 RE |
160 | ret=a->length; |
161 | r=ASN1_object_size(0,ret,tag); | |
162 | if (pp == NULL) return(r); | |
163 | p= *pp; | |
164 | ||
165 | if ((tag == V_ASN1_SEQUENCE) || (tag == V_ASN1_SET)) | |
166 | constructed=1; | |
167 | else | |
168 | constructed=0; | |
169 | ASN1_put_object(&p,constructed,ret,tag,xclass); | |
170 | memcpy(p,a->data,a->length); | |
171 | p+=a->length; | |
172 | *pp= p; | |
173 | return(r); | |
174 | } | |
175 | ||
6b691a5c UM |
176 | ASN1_STRING *d2i_ASN1_bytes(ASN1_STRING **a, unsigned char **pp, long length, |
177 | int Ptag, int Pclass) | |
d02b48c6 RE |
178 | { |
179 | ASN1_STRING *ret=NULL; | |
180 | unsigned char *p,*s; | |
181 | long len; | |
182 | int inf,tag,xclass; | |
183 | int i=0; | |
184 | ||
185 | if ((a == NULL) || ((*a) == NULL)) | |
186 | { | |
187 | if ((ret=ASN1_STRING_new()) == NULL) return(NULL); | |
188 | } | |
189 | else | |
190 | ret=(*a); | |
191 | ||
192 | p= *pp; | |
193 | inf=ASN1_get_object(&p,&len,&tag,&xclass,length); | |
194 | if (inf & 0x80) | |
195 | { | |
196 | i=ASN1_R_BAD_OBJECT_HEADER; | |
197 | goto err; | |
198 | } | |
199 | ||
200 | if (tag != Ptag) | |
201 | { | |
202 | i=ASN1_R_WRONG_TAG; | |
203 | goto err; | |
204 | } | |
205 | ||
206 | if (inf & V_ASN1_CONSTRUCTED) | |
207 | { | |
208 | ASN1_CTX c; | |
209 | ||
210 | c.pp=pp; | |
211 | c.p=p; | |
212 | c.inf=inf; | |
213 | c.slen=len; | |
214 | c.tag=Ptag; | |
215 | c.xclass=Pclass; | |
216 | c.max=(length == 0)?0:(p+length); | |
217 | if (!asn1_collate_primative(ret,&c)) | |
218 | goto err; | |
219 | else | |
220 | { | |
221 | p=c.p; | |
222 | } | |
223 | } | |
224 | else | |
225 | { | |
226 | if (len != 0) | |
227 | { | |
58964a49 | 228 | if ((ret->length < len) || (ret->data == NULL)) |
d02b48c6 RE |
229 | { |
230 | if (ret->data != NULL) Free((char *)ret->data); | |
231 | s=(unsigned char *)Malloc((int)len); | |
232 | if (s == NULL) | |
233 | { | |
234 | i=ERR_R_MALLOC_FAILURE; | |
235 | goto err; | |
236 | } | |
237 | } | |
238 | else | |
239 | s=ret->data; | |
240 | memcpy(s,p,(int)len); | |
241 | p+=len; | |
242 | } | |
243 | else | |
244 | { | |
245 | s=NULL; | |
246 | if (ret->data != NULL) Free((char *)ret->data); | |
247 | } | |
248 | ||
249 | ret->length=(int)len; | |
250 | ret->data=s; | |
251 | ret->type=Ptag; | |
252 | } | |
253 | ||
254 | if (a != NULL) (*a)=ret; | |
255 | *pp=p; | |
256 | return(ret); | |
257 | err: | |
258 | if ((ret != NULL) && ((a == NULL) || (*a != ret))) | |
259 | ASN1_STRING_free(ret); | |
260 | ASN1err(ASN1_F_D2I_ASN1_BYTES,i); | |
261 | return(NULL); | |
262 | } | |
263 | ||
264 | ||
265 | /* We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapes | |
266 | * them into the one struture that is then returned */ | |
267 | /* There have been a few bug fixes for this function from | |
268 | * Paul Keogh <paul.keogh@sse.ie>, many thanks to him */ | |
6b691a5c | 269 | static int asn1_collate_primative(ASN1_STRING *a, ASN1_CTX *c) |
d02b48c6 RE |
270 | { |
271 | ASN1_STRING *os=NULL; | |
272 | BUF_MEM b; | |
273 | int num; | |
274 | ||
275 | b.length=0; | |
276 | b.max=0; | |
277 | b.data=NULL; | |
278 | ||
279 | if (a == NULL) | |
280 | { | |
281 | c->error=ERR_R_PASSED_NULL_PARAMETER; | |
282 | goto err; | |
283 | } | |
284 | ||
285 | num=0; | |
286 | for (;;) | |
287 | { | |
288 | if (c->inf & 1) | |
289 | { | |
290 | c->eos=ASN1_check_infinite_end(&c->p, | |
291 | (long)(c->max-c->p)); | |
292 | if (c->eos) break; | |
293 | } | |
294 | else | |
295 | { | |
296 | if (c->slen <= 0) break; | |
297 | } | |
298 | ||
299 | c->q=c->p; | |
300 | if (d2i_ASN1_bytes(&os,&c->p,c->max-c->p,c->tag,c->xclass) | |
301 | == NULL) | |
302 | { | |
303 | c->error=ERR_R_ASN1_LIB; | |
304 | goto err; | |
305 | } | |
306 | ||
307 | if (!BUF_MEM_grow(&b,num+os->length)) | |
308 | { | |
309 | c->error=ERR_R_BUF_LIB; | |
310 | goto err; | |
311 | } | |
312 | memcpy(&(b.data[num]),os->data,os->length); | |
313 | if (!(c->inf & 1)) | |
314 | c->slen-=(c->p-c->q); | |
315 | num+=os->length; | |
316 | } | |
317 | ||
318 | if (!asn1_Finish(c)) goto err; | |
319 | ||
320 | a->length=num; | |
321 | if (a->data != NULL) Free(a->data); | |
322 | a->data=(unsigned char *)b.data; | |
323 | if (os != NULL) ASN1_STRING_free(os); | |
324 | return(1); | |
325 | err: | |
326 | ASN1err(ASN1_F_ASN1_COLLATE_PRIMATIVE,c->error); | |
327 | if (os != NULL) ASN1_STRING_free(os); | |
328 | if (b.data != NULL) Free(b.data); | |
329 | return(0); | |
330 | } | |
331 |