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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 | 63 | static unsigned long tag2bit[32]={ |
58964a49 | 64 | 0, 0, 0, B_ASN1_BIT_STRING, /* tags 0 - 3 */ |
d02b48c6 RE |
65 | B_ASN1_OCTET_STRING, 0, 0, B_ASN1_UNKNOWN,/* tags 4- 7 */ |
66 | B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN, B_ASN1_UNKNOWN,/* tags 8-11 */ | |
d77b3054 | 67 | B_ASN1_UTF8STRING,B_ASN1_UNKNOWN,B_ASN1_UNKNOWN,B_ASN1_UNKNOWN,/* tags 12-15 */ |
9d6b1ce6 DSH |
68 | 0, 0, B_ASN1_NUMERICSTRING,B_ASN1_PRINTABLESTRING, /* tags 16-19 */ |
69 | B_ASN1_T61STRING,B_ASN1_VIDEOTEXSTRING,B_ASN1_IA5STRING, /* tags 20-22 */ | |
70 | B_ASN1_UTCTIME, B_ASN1_GENERALIZEDTIME, /* tags 23-24 */ | |
71 | B_ASN1_GRAPHICSTRING,B_ASN1_ISO64STRING,B_ASN1_GENERALSTRING, /* tags 25-27 */ | |
72 | B_ASN1_UNIVERSALSTRING,B_ASN1_UNKNOWN,B_ASN1_BMPSTRING,B_ASN1_UNKNOWN, /* tags 28-31 */ | |
d02b48c6 RE |
73 | }; |
74 | ||
9d6b1ce6 DSH |
75 | unsigned long ASN1_tag2bit(int tag) |
76 | { | |
77 | if((tag < 0) || (tag > 30)) return 0; | |
78 | return tag2bit[tag]; | |
79 | } | |
80 | ||
657e60fa | 81 | static int asn1_collate_primitive(ASN1_STRING *a, ASN1_CTX *c); |
d77b3054 | 82 | /* type is a 'bitmap' of acceptable string types. |
d02b48c6 | 83 | */ |
6b691a5c UM |
84 | ASN1_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); | |
141 | err: | |
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 | 148 | int 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 |
174 | ASN1_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); | |
256 | err: | |
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 | 268 | static 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); | |
324 | err: | |
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 |