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