1 /* crypto/asn1/asn1_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
62 #include <openssl/asn1.h>
63 #include <openssl/asn1_mac.h>
65 static int asn1_get_length(const unsigned char **pp, int *inf, long *rl,
67 static void asn1_put_length(unsigned char **pp, int length);
68 const char ASN1_version[] = "ASN.1" OPENSSL_VERSION_PTEXT;
70 static int _asn1_check_infinite_end(const unsigned char **p, long len)
73 * If there is 0 or 1 byte left, the length check should pick things up
77 else if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0)) {
84 int ASN1_check_infinite_end(unsigned char **p, long len)
86 return _asn1_check_infinite_end((const unsigned char **)p, len);
89 int ASN1_const_check_infinite_end(const unsigned char **p, long len)
91 return _asn1_check_infinite_end(p, len);
94 int ASN1_get_object(const unsigned char **pp, long *plength, int *ptag,
95 int *pclass, long omax)
99 const unsigned char *p = *pp;
100 int tag, xclass, inf;
105 ret = (*p & V_ASN1_CONSTRUCTED);
106 xclass = (*p & V_ASN1_PRIVATE);
107 i = *p & V_ASN1_PRIMITIVE_TAG;
108 if (i == V_ASN1_PRIMITIVE_TAG) { /* high-tag */
118 if (l > (INT_MAX >> 7L))
134 if (!asn1_get_length(&p, &inf, plength, max))
137 if (inf && !(ret & V_ASN1_CONSTRUCTED))
141 fprintf(stderr, "p=%d + *plength=%ld > omax=%ld + *pp=%d (%d > %d)\n",
142 (int)p, *plength, omax, (int)*pp, (int)(p + *plength),
146 if (*plength > (omax - (p - *pp))) {
147 ASN1err(ASN1_F_ASN1_GET_OBJECT, ASN1_R_TOO_LONG);
149 * Set this so that even if things are not long enough the values are
157 ASN1err(ASN1_F_ASN1_GET_OBJECT, ASN1_R_HEADER_TOO_LONG);
161 static int asn1_get_length(const unsigned char **pp, int *inf, long *rl,
164 const unsigned char *p = *pp;
165 unsigned long ret = 0;
178 if (i > sizeof(ret) || max < (long)i)
195 * class 0 is constructed constructed == 2 for indefinite length constructed
197 void ASN1_put_object(unsigned char **pp, int constructed, int length, int tag,
200 unsigned char *p = *pp;
203 i = (constructed) ? V_ASN1_CONSTRUCTED : 0;
204 i |= (xclass & V_ASN1_PRIVATE);
206 *(p++) = i | (tag & V_ASN1_PRIMITIVE_TAG);
208 *(p++) = i | V_ASN1_PRIMITIVE_TAG;
209 for (i = 0, ttag = tag; ttag > 0; i++)
220 if (constructed == 2)
223 asn1_put_length(&p, length);
227 int ASN1_put_eoc(unsigned char **pp)
229 unsigned char *p = *pp;
236 static void asn1_put_length(unsigned char **pp, int length)
238 unsigned char *p = *pp;
241 *(p++) = (unsigned char)length;
244 for (i = 0; l > 0; i++)
249 p[i] = length & 0xff;
257 int ASN1_object_size(int constructed, int length, int tag)
268 if (constructed == 2) {
280 if (ret >= INT_MAX - length)
285 static int _asn1_Finish(ASN1_const_CTX *c)
287 if ((c->inf == (1 | V_ASN1_CONSTRUCTED)) && (!c->eos)) {
288 if (!ASN1_const_check_infinite_end(&c->p, c->slen)) {
289 c->error = ERR_R_MISSING_ASN1_EOS;
293 if (((c->slen != 0) && !(c->inf & 1)) || ((c->slen < 0) && (c->inf & 1))) {
294 c->error = ERR_R_ASN1_LENGTH_MISMATCH;
300 int asn1_Finish(ASN1_CTX *c)
302 return _asn1_Finish((ASN1_const_CTX *)c);
305 int asn1_const_Finish(ASN1_const_CTX *c)
307 return _asn1_Finish(c);
310 int asn1_GetSequence(ASN1_const_CTX *c, long *length)
312 const unsigned char *q;
315 c->inf = ASN1_get_object(&(c->p), &(c->slen), &(c->tag), &(c->xclass),
318 c->error = ERR_R_BAD_GET_ASN1_OBJECT_CALL;
321 if (c->tag != V_ASN1_SEQUENCE) {
322 c->error = ERR_R_EXPECTING_AN_ASN1_SEQUENCE;
325 (*length) -= (c->p - q);
326 if (c->max && (*length < 0)) {
327 c->error = ERR_R_ASN1_LENGTH_MISMATCH;
330 if (c->inf == (1 | V_ASN1_CONSTRUCTED))
336 int ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *str)
340 dst->type = str->type;
341 if (!ASN1_STRING_set(dst, str->data, str->length))
343 dst->flags = str->flags;
347 ASN1_STRING *ASN1_STRING_dup(const ASN1_STRING *str)
352 ret = ASN1_STRING_new();
355 if (!ASN1_STRING_copy(ret, str)) {
356 ASN1_STRING_free(ret);
362 int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len)
365 const char *data = _data;
373 if ((str->length <= len) || (str->data == NULL)) {
376 str->data = OPENSSL_malloc(len + 1);
378 str->data = OPENSSL_realloc(c, len + 1);
380 if (str->data == NULL) {
381 ASN1err(ASN1_F_ASN1_STRING_SET, ERR_R_MALLOC_FAILURE);
388 memcpy(str->data, data, len);
389 /* an allowance for strings :-) */
390 str->data[len] = '\0';
395 void ASN1_STRING_set0(ASN1_STRING *str, void *data, int len)
398 OPENSSL_free(str->data);
403 ASN1_STRING *ASN1_STRING_new(void)
405 return (ASN1_STRING_type_new(V_ASN1_OCTET_STRING));
408 ASN1_STRING *ASN1_STRING_type_new(int type)
412 ret = (ASN1_STRING *)OPENSSL_malloc(sizeof(ASN1_STRING));
414 ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW, ERR_R_MALLOC_FAILURE);
424 void ASN1_STRING_free(ASN1_STRING *a)
428 if (a->data && !(a->flags & ASN1_STRING_FLAG_NDEF))
429 OPENSSL_free(a->data);
433 void ASN1_STRING_clear_free(ASN1_STRING *a)
435 if (a && a->data && !(a->flags & ASN1_STRING_FLAG_NDEF))
436 OPENSSL_cleanse(a->data, a->length);
440 int ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
444 i = (a->length - b->length);
446 i = memcmp(a->data, b->data, a->length);
448 return (a->type - b->type);
455 void asn1_add_error(const unsigned char *address, int offset)
457 char buf1[DECIMAL_SIZE(address) + 1], buf2[DECIMAL_SIZE(offset) + 1];
459 BIO_snprintf(buf1, sizeof buf1, "%lu", (unsigned long)address);
460 BIO_snprintf(buf2, sizeof buf2, "%d", offset);
461 ERR_add_error_data(4, "address=", buf1, " offset=", buf2);
464 int ASN1_STRING_length(const ASN1_STRING *x)
466 return M_ASN1_STRING_length(x);
469 void ASN1_STRING_length_set(ASN1_STRING *x, int len)
471 M_ASN1_STRING_length_set(x, len);
475 int ASN1_STRING_type(ASN1_STRING *x)
477 return M_ASN1_STRING_type(x);
480 unsigned char *ASN1_STRING_data(ASN1_STRING *x)
482 return M_ASN1_STRING_data(x);