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diff --git a/src/lib/libcrypto/asn1/asn1_lib.c b/src/lib/libcrypto/asn1/asn1_lib.c
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1/* crypto/asn1/asn1_lib.c */
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 <limits.h>
61#include "cryptlib.h"
62#include <openssl/asn1.h>
63#include <openssl/asn1_mac.h>
64
65static int asn1_get_length(unsigned char **pp,int *inf,long *rl,int max);
66static void asn1_put_length(unsigned char **pp, int length);
67const char *ASN1_version="ASN.1" OPENSSL_VERSION_PTEXT;
68
69int ASN1_check_infinite_end(unsigned char **p, long len)
70 {
71 /* If there is 0 or 1 byte left, the length check should pick
72 * things up */
73 if (len <= 0)
74 return(1);
75 else if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0))
76 {
77 (*p)+=2;
78 return(1);
79 }
80 return(0);
81 }
82
83
84int ASN1_get_object(unsigned char **pp, long *plength, int *ptag, int *pclass,
85 long omax)
86 {
87 int i,ret;
88 long l;
89 unsigned char *p= *pp;
90 int tag,xclass,inf;
91 long max=omax;
92
93 if (!max) goto err;
94 ret=(*p&V_ASN1_CONSTRUCTED);
95 xclass=(*p&V_ASN1_PRIVATE);
96 i= *p&V_ASN1_PRIMITIVE_TAG;
97 if (i == V_ASN1_PRIMITIVE_TAG)
98 { /* high-tag */
99 p++;
100 if (--max == 0) goto err;
101 l=0;
102 while (*p&0x80)
103 {
104 l<<=7L;
105 l|= *(p++)&0x7f;
106 if (--max == 0) goto err;
107 if (l > (INT_MAX >> 7L)) goto err;
108 }
109 l<<=7L;
110 l|= *(p++)&0x7f;
111 tag=(int)l;
112 if (--max == 0) goto err;
113 }
114 else
115 {
116 tag=i;
117 p++;
118 if (--max == 0) goto err;
119 }
120 *ptag=tag;
121 *pclass=xclass;
122 if (!asn1_get_length(&p,&inf,plength,(int)max)) goto err;
123
124#if 0
125 fprintf(stderr,"p=%d + *plength=%ld > omax=%ld + *pp=%d (%d > %d)\n",
126 (int)p,*plength,omax,(int)*pp,(int)(p+ *plength),
127 (int)(omax+ *pp));
128
129#endif
130 if (*plength > (omax - (p - *pp)))
131 {
132 ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_TOO_LONG);
133 /* Set this so that even if things are not long enough
134 * the values are set correctly */
135 ret|=0x80;
136 }
137 *pp=p;
138 return(ret|inf);
139err:
140 ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_HEADER_TOO_LONG);
141 return(0x80);
142 }
143
144static int asn1_get_length(unsigned char **pp, int *inf, long *rl, int max)
145 {
146 unsigned char *p= *pp;
147 unsigned long ret=0;
148 int i;
149
150 if (max-- < 1) return(0);
151 if (*p == 0x80)
152 {
153 *inf=1;
154 ret=0;
155 p++;
156 }
157 else
158 {
159 *inf=0;
160 i= *p&0x7f;
161 if (*(p++) & 0x80)
162 {
163 if (i > sizeof(long))
164 return 0;
165 if (max-- == 0) return(0);
166 while (i-- > 0)
167 {
168 ret<<=8L;
169 ret|= *(p++);
170 if (max-- == 0) return(0);
171 }
172 }
173 else
174 ret=i;
175 }
176 if (ret > LONG_MAX)
177 return 0;
178 *pp=p;
179 *rl=(long)ret;
180 return(1);
181 }
182
183/* class 0 is constructed
184 * constructed == 2 for indefinite length constructed */
185void ASN1_put_object(unsigned char **pp, int constructed, int length, int tag,
186 int xclass)
187 {
188 unsigned char *p= *pp;
189 int i, ttag;
190
191 i=(constructed)?V_ASN1_CONSTRUCTED:0;
192 i|=(xclass&V_ASN1_PRIVATE);
193 if (tag < 31)
194 *(p++)=i|(tag&V_ASN1_PRIMITIVE_TAG);
195 else
196 {
197 *(p++)=i|V_ASN1_PRIMITIVE_TAG;
198 for(i = 0, ttag = tag; ttag > 0; i++) ttag >>=7;
199 ttag = i;
200 while(i-- > 0)
201 {
202 p[i] = tag & 0x7f;
203 if(i != (ttag - 1)) p[i] |= 0x80;
204 tag >>= 7;
205 }
206 p += ttag;
207 }
208 if ((constructed == 2) && (length == 0))
209 *(p++)=0x80; /* der_put_length would output 0 instead */
210 else
211 asn1_put_length(&p,length);
212 *pp=p;
213 }
214
215static void asn1_put_length(unsigned char **pp, int length)
216 {
217 unsigned char *p= *pp;
218 int i,l;
219 if (length <= 127)
220 *(p++)=(unsigned char)length;
221 else
222 {
223 l=length;
224 for (i=0; l > 0; i++)
225 l>>=8;
226 *(p++)=i|0x80;
227 l=i;
228 while (i-- > 0)
229 {
230 p[i]=length&0xff;
231 length>>=8;
232 }
233 p+=l;
234 }
235 *pp=p;
236 }
237
238int ASN1_object_size(int constructed, int length, int tag)
239 {
240 int ret;
241
242 ret=length;
243 ret++;
244 if (tag >= 31)
245 {
246 while (tag > 0)
247 {
248 tag>>=7;
249 ret++;
250 }
251 }
252 if ((length == 0) && (constructed == 2))
253 ret+=2;
254 ret++;
255 if (length > 127)
256 {
257 while (length > 0)
258 {
259 length>>=8;
260 ret++;
261 }
262 }
263 return(ret);
264 }
265
266int asn1_Finish(ASN1_CTX *c)
267 {
268 if ((c->inf == (1|V_ASN1_CONSTRUCTED)) && (!c->eos))
269 {
270 if (!ASN1_check_infinite_end(&c->p,c->slen))
271 {
272 c->error=ERR_R_MISSING_ASN1_EOS;
273 return(0);
274 }
275 }
276 if ( ((c->slen != 0) && !(c->inf & 1)) ||
277 ((c->slen < 0) && (c->inf & 1)))
278 {
279 c->error=ERR_R_ASN1_LENGTH_MISMATCH;
280 return(0);
281 }
282 return(1);
283 }
284
285int asn1_GetSequence(ASN1_CTX *c, long *length)
286 {
287 unsigned char *q;
288
289 q=c->p;
290 c->inf=ASN1_get_object(&(c->p),&(c->slen),&(c->tag),&(c->xclass),
291 *length);
292 if (c->inf & 0x80)
293 {
294 c->error=ERR_R_BAD_GET_ASN1_OBJECT_CALL;
295 return(0);
296 }
297 if (c->tag != V_ASN1_SEQUENCE)
298 {
299 c->error=ERR_R_EXPECTING_AN_ASN1_SEQUENCE;
300 return(0);
301 }
302 (*length)-=(c->p-q);
303 if (c->max && (*length < 0))
304 {
305 c->error=ERR_R_ASN1_LENGTH_MISMATCH;
306 return(0);
307 }
308 if (c->inf == (1|V_ASN1_CONSTRUCTED))
309 c->slen= *length+ *(c->pp)-c->p;
310 c->eos=0;
311 return(1);
312 }
313
314ASN1_STRING *ASN1_STRING_dup(ASN1_STRING *str)
315 {
316 ASN1_STRING *ret;
317
318 if (str == NULL) return(NULL);
319 if ((ret=ASN1_STRING_type_new(str->type)) == NULL)
320 return(NULL);
321 if (!ASN1_STRING_set(ret,str->data,str->length))
322 {
323 ASN1_STRING_free(ret);
324 return(NULL);
325 }
326 ret->flags = str->flags;
327 return(ret);
328 }
329
330int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len)
331 {
332 unsigned char *c;
333 const char *data=_data;
334
335 if (len < 0)
336 {
337 if (data == NULL)
338 return(0);
339 else
340 len=strlen(data);
341 }
342 if ((str->length < len) || (str->data == NULL))
343 {
344 c=str->data;
345 if (c == NULL)
346 str->data=OPENSSL_malloc(len+1);
347 else
348 str->data=OPENSSL_realloc(c,len+1);
349
350 if (str->data == NULL)
351 {
352 ASN1err(ASN1_F_ASN1_STRING_SET,ERR_R_MALLOC_FAILURE);
353 str->data=c;
354 return(0);
355 }
356 }
357 str->length=len;
358 if (data != NULL)
359 {
360 memcpy(str->data,data,len);
361 /* an allowance for strings :-) */
362 str->data[len]='\0';
363 }
364 return(1);
365 }
366
367ASN1_STRING *ASN1_STRING_new(void)
368 {
369 return(ASN1_STRING_type_new(V_ASN1_OCTET_STRING));
370 }
371
372
373ASN1_STRING *ASN1_STRING_type_new(int type)
374 {
375 ASN1_STRING *ret;
376
377 ret=(ASN1_STRING *)OPENSSL_malloc(sizeof(ASN1_STRING));
378 if (ret == NULL)
379 {
380 ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW,ERR_R_MALLOC_FAILURE);
381 return(NULL);
382 }
383 ret->length=0;
384 ret->type=type;
385 ret->data=NULL;
386 ret->flags=0;
387 return(ret);
388 }
389
390void ASN1_STRING_free(ASN1_STRING *a)
391 {
392 if (a == NULL) return;
393 if (a->data != NULL) OPENSSL_free(a->data);
394 OPENSSL_free(a);
395 }
396
397int ASN1_STRING_cmp(ASN1_STRING *a, ASN1_STRING *b)
398 {
399 int i;
400
401 i=(a->length-b->length);
402 if (i == 0)
403 {
404 i=memcmp(a->data,b->data,a->length);
405 if (i == 0)
406 return(a->type-b->type);
407 else
408 return(i);
409 }
410 else
411 return(i);
412 }
413
414void asn1_add_error(unsigned char *address, int offset)
415 {
416 char buf1[DECIMAL_SIZE(address)+1],buf2[DECIMAL_SIZE(offset)+1];
417
418 BIO_snprintf(buf1,sizeof buf1,"%lu",(unsigned long)address);
419 BIO_snprintf(buf2,sizeof buf2,"%d",offset);
420 ERR_add_error_data(4,"address=",buf1," offset=",buf2);
421 }
422
423int ASN1_STRING_length(ASN1_STRING *x)
424{ return M_ASN1_STRING_length(x); }
425
426void ASN1_STRING_length_set(ASN1_STRING *x, int len)
427{ M_ASN1_STRING_length_set(x, len); return; }
428
429int ASN1_STRING_type(ASN1_STRING *x)
430{ return M_ASN1_STRING_type(x); }
431
432unsigned char * ASN1_STRING_data(ASN1_STRING *x)
433{ return M_ASN1_STRING_data(x); }
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