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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/* $OpenBSD: asn1_lib.c,v 1.34 2015/02/07 22:30:25 miod Exp $ */
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 <limits.h>
60#include <stdio.h>
61#include <string.h>
62
63#include <openssl/asn1.h>
64#include <openssl/asn1_mac.h>
65#include <openssl/err.h>
66
67static int asn1_get_length(const unsigned char **pp, int *inf, long *rl, int max);
68static void asn1_put_length(unsigned char **pp, int length);
69
70static int
71_asn1_check_infinite_end(const unsigned char **p, long len)
72{
73 /* If there is 0 or 1 byte left, the length check should pick
74 * things up */
75 if (len <= 0)
76 return (1);
77 else if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0)) {
78 (*p) += 2;
79 return (1);
80 }
81 return (0);
82}
83
84int
85ASN1_check_infinite_end(unsigned char **p, long len)
86{
87 return _asn1_check_infinite_end((const unsigned char **)p, len);
88}
89
90int
91ASN1_const_check_infinite_end(const unsigned char **p, long len)
92{
93 return _asn1_check_infinite_end(p, len);
94}
95
96int
97ASN1_get_object(const unsigned char **pp, long *plength, int *ptag,
98 int *pclass, long omax)
99{
100 int i, ret;
101 long l;
102 const unsigned char *p= *pp;
103 int tag, xclass, inf;
104 long max = omax;
105
106 if (!max)
107 goto err;
108 ret = (*p & V_ASN1_CONSTRUCTED);
109 xclass = (*p & V_ASN1_PRIVATE);
110 i= *p & V_ASN1_PRIMITIVE_TAG;
111 if (i == V_ASN1_PRIMITIVE_TAG) { /* high-tag */
112 p++;
113 if (--max == 0)
114 goto err;
115 l = 0;
116 while (*p & 0x80) {
117 l <<= 7L;
118 l |= *(p++) & 0x7f;
119 if (--max == 0)
120 goto err;
121 if (l > (INT_MAX >> 7L))
122 goto err;
123 }
124 l <<= 7L;
125 l |= *(p++) & 0x7f;
126 tag = (int)l;
127 if (--max == 0)
128 goto err;
129 } else {
130 tag = i;
131 p++;
132 if (--max == 0)
133 goto err;
134 }
135 *ptag = tag;
136 *pclass = xclass;
137 if (!asn1_get_length(&p, &inf, plength, (int)max))
138 goto err;
139
140 if (inf && !(ret & V_ASN1_CONSTRUCTED))
141 goto err;
142
143 if (*plength > (omax - (p - *pp))) {
144 ASN1err(ASN1_F_ASN1_GET_OBJECT, ASN1_R_TOO_LONG);
145 /* Set this so that even if things are not long enough
146 * the values are set correctly */
147 ret |= 0x80;
148 }
149 *pp = p;
150 return (ret | inf);
151
152err:
153 ASN1err(ASN1_F_ASN1_GET_OBJECT, ASN1_R_HEADER_TOO_LONG);
154 return (0x80);
155}
156
157static int
158asn1_get_length(const unsigned char **pp, int *inf, long *rl, int max)
159{
160 const unsigned char *p= *pp;
161 unsigned long ret = 0;
162 unsigned int i;
163
164 if (max-- < 1)
165 return (0);
166 if (*p == 0x80) {
167 *inf = 1;
168 ret = 0;
169 p++;
170 } else {
171 *inf = 0;
172 i= *p & 0x7f;
173 if (*(p++) & 0x80) {
174 if (max < (int)i)
175 return (0);
176 /* skip leading zeroes */
177 while (i && *p == 0) {
178 p++;
179 i--;
180 }
181 if (i > sizeof(long))
182 return 0;
183 while (i-- > 0) {
184 ret <<= 8L;
185 ret |= *(p++);
186 }
187 } else
188 ret = i;
189 }
190 if (ret > LONG_MAX)
191 return 0;
192 *pp = p;
193 *rl = (long)ret;
194 return (1);
195}
196
197/* class 0 is constructed
198 * constructed == 2 for indefinite length constructed */
199void
200ASN1_put_object(unsigned char **pp, int constructed, int length, int tag,
201 int xclass)
202{
203 unsigned char *p= *pp;
204 int i, ttag;
205
206 i = (constructed) ? V_ASN1_CONSTRUCTED : 0;
207 i |= (xclass & V_ASN1_PRIVATE);
208 if (tag < 31)
209 *(p++) = i | (tag & V_ASN1_PRIMITIVE_TAG);
210 else {
211 *(p++) = i | V_ASN1_PRIMITIVE_TAG;
212 for(i = 0, ttag = tag; ttag > 0; i++)
213 ttag >>= 7;
214 ttag = i;
215 while (i-- > 0) {
216 p[i] = tag & 0x7f;
217 if (i != (ttag - 1))
218 p[i] |= 0x80;
219 tag >>= 7;
220 }
221 p += ttag;
222 }
223 if (constructed == 2)
224 *(p++) = 0x80;
225 else
226 asn1_put_length(&p, length);
227 *pp = p;
228}
229
230int
231ASN1_put_eoc(unsigned char **pp)
232{
233 unsigned char *p = *pp;
234
235 *p++ = 0;
236 *p++ = 0;
237 *pp = p;
238 return 2;
239}
240
241static void
242asn1_put_length(unsigned char **pp, int length)
243{
244 unsigned char *p= *pp;
245
246 int i, l;
247 if (length <= 127)
248 *(p++) = (unsigned char)length;
249 else {
250 l = length;
251 for (i = 0; l > 0; i++)
252 l >>= 8;
253 *(p++) = i | 0x80;
254 l = i;
255 while (i-- > 0) {
256 p[i] = length & 0xff;
257 length >>= 8;
258 }
259 p += l;
260 }
261 *pp = p;
262}
263
264int
265ASN1_object_size(int constructed, int length, int tag)
266{
267 int ret;
268
269 ret = length;
270 ret++;
271 if (tag >= 31) {
272 while (tag > 0) {
273 tag >>= 7;
274 ret++;
275 }
276 }
277 if (constructed == 2)
278 return ret + 3;
279 ret++;
280 if (length > 127) {
281 while (length > 0) {
282 length >>= 8;
283 ret++;
284 }
285 }
286 return (ret);
287}
288
289static int
290_asn1_Finish(ASN1_const_CTX *c)
291{
292 if ((c->inf == (1|V_ASN1_CONSTRUCTED)) && (!c->eos)) {
293 if (!ASN1_const_check_infinite_end(&c->p, c->slen)) {
294 c->error = ERR_R_MISSING_ASN1_EOS;
295 return (0);
296 }
297 }
298 if (((c->slen != 0) && !(c->inf & 1)) ||
299 ((c->slen < 0) && (c->inf & 1))) {
300 c->error = ERR_R_ASN1_LENGTH_MISMATCH;
301 return (0);
302 }
303 return (1);
304}
305
306int
307asn1_Finish(ASN1_CTX *c)
308{
309 return _asn1_Finish((ASN1_const_CTX *)c);
310}
311
312int
313asn1_const_Finish(ASN1_const_CTX *c)
314{
315 return _asn1_Finish(c);
316}
317
318int
319asn1_GetSequence(ASN1_const_CTX *c, long *length)
320{
321 const unsigned char *q;
322
323 q = c->p;
324 c->inf = ASN1_get_object(&(c->p), &(c->slen), &(c->tag), &(c->xclass),
325 *length);
326 if (c->inf & 0x80) {
327 c->error = ERR_R_BAD_GET_ASN1_OBJECT_CALL;
328 return (0);
329 }
330 if (c->tag != V_ASN1_SEQUENCE) {
331 c->error = ERR_R_EXPECTING_AN_ASN1_SEQUENCE;
332 return (0);
333 }
334 (*length) -= (c->p - q);
335 if (c->max && (*length < 0)) {
336 c->error = ERR_R_ASN1_LENGTH_MISMATCH;
337 return (0);
338 }
339 if (c->inf == (1|V_ASN1_CONSTRUCTED))
340 c->slen= *length+ *(c->pp) - c->p;
341 c->eos = 0;
342 return (1);
343}
344
345int
346ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *str)
347{
348 if (str == NULL)
349 return 0;
350 dst->type = str->type;
351 if (!ASN1_STRING_set(dst, str->data, str->length))
352 return 0;
353 dst->flags = str->flags;
354 return 1;
355}
356
357ASN1_STRING *
358ASN1_STRING_dup(const ASN1_STRING *str)
359{
360 ASN1_STRING *ret;
361
362 if (!str)
363 return NULL;
364 ret = ASN1_STRING_new();
365 if (!ret)
366 return NULL;
367 if (!ASN1_STRING_copy(ret, str)) {
368 ASN1_STRING_free(ret);
369 return NULL;
370 }
371 return ret;
372}
373
374int
375ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len)
376{
377 const char *data = _data;
378
379 if (len < 0) {
380 if (data == NULL)
381 return (0);
382 else
383 len = strlen(data);
384 }
385 if ((str->length < len) || (str->data == NULL)) {
386 unsigned char *tmp;
387 tmp = realloc(str->data, len + 1);
388 if (tmp == NULL) {
389 ASN1err(ASN1_F_ASN1_STRING_SET, ERR_R_MALLOC_FAILURE);
390 return (0);
391 }
392 str->data = tmp;
393 }
394 str->length = len;
395 if (data != NULL) {
396 memmove(str->data, data, len);
397 }
398 str->data[str->length]='\0';
399 return (1);
400}
401
402void
403ASN1_STRING_set0(ASN1_STRING *str, void *data, int len)
404{
405 free(str->data);
406 str->data = data;
407 str->length = len;
408}
409
410ASN1_STRING *
411ASN1_STRING_new(void)
412{
413 return (ASN1_STRING_type_new(V_ASN1_OCTET_STRING));
414}
415
416ASN1_STRING *
417ASN1_STRING_type_new(int type)
418{
419 ASN1_STRING *ret;
420
421 ret = malloc(sizeof(ASN1_STRING));
422 if (ret == NULL) {
423 ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW, ERR_R_MALLOC_FAILURE);
424 return (NULL);
425 }
426 ret->length = 0;
427 ret->type = type;
428 ret->data = NULL;
429 ret->flags = 0;
430 return (ret);
431}
432
433void
434ASN1_STRING_free(ASN1_STRING *a)
435{
436 if (a == NULL)
437 return;
438 if (a->data && !(a->flags & ASN1_STRING_FLAG_NDEF))
439 free(a->data);
440 free(a);
441}
442
443int
444ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
445{
446 int i;
447
448 i = (a->length - b->length);
449 if (i == 0) {
450 i = memcmp(a->data, b->data, a->length);
451 if (i == 0)
452 return (a->type - b->type);
453 else
454 return (i);
455 } else
456 return (i);
457}
458
459void
460asn1_add_error(const unsigned char *address, int offset)
461{
462 ERR_asprintf_error_data("offset=%d", offset);
463}
464
465int
466ASN1_STRING_length(const ASN1_STRING *x)
467{
468 return M_ASN1_STRING_length(x);
469}
470
471void
472ASN1_STRING_length_set(ASN1_STRING *x, int len)
473{
474 M_ASN1_STRING_length_set(x, len);
475 return;
476}
477
478int
479ASN1_STRING_type(ASN1_STRING *x)
480{
481 return M_ASN1_STRING_type(x);
482}
483
484unsigned char *
485ASN1_STRING_data(ASN1_STRING *x)
486{
487 return M_ASN1_STRING_data(x);
488}
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