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>
64 static int asn1_get_length(const unsigned char **pp
, int *inf
, long *rl
,
66 static void asn1_put_length(unsigned char **pp
, int length
);
67 const char ASN1_version
[] = "ASN.1" OPENSSL_VERSION_PTEXT
;
69 static int _asn1_check_infinite_end(const unsigned char **p
, long len
)
72 * If there is 0 or 1 byte left, the length check should pick things up
76 else if ((len
>= 2) && ((*p
)[0] == 0) && ((*p
)[1] == 0)) {
83 int ASN1_check_infinite_end(unsigned char **p
, long len
)
85 return _asn1_check_infinite_end((const unsigned char **)p
, len
);
88 int ASN1_const_check_infinite_end(const unsigned char **p
, long len
)
90 return _asn1_check_infinite_end(p
, len
);
93 int ASN1_get_object(const unsigned char **pp
, long *plength
, int *ptag
,
94 int *pclass
, long omax
)
98 const unsigned char *p
= *pp
;
104 ret
= (*p
& V_ASN1_CONSTRUCTED
);
105 xclass
= (*p
& V_ASN1_PRIVATE
);
106 i
= *p
& V_ASN1_PRIMITIVE_TAG
;
107 if (i
== V_ASN1_PRIMITIVE_TAG
) { /* high-tag */
117 if (l
> (INT_MAX
>> 7L))
133 if (!asn1_get_length(&p
, &inf
, plength
, (int)max
))
136 if (inf
&& !(ret
& V_ASN1_CONSTRUCTED
))
139 if (*plength
> (omax
- (p
- *pp
))) {
140 ASN1err(ASN1_F_ASN1_GET_OBJECT
, ASN1_R_TOO_LONG
);
142 * Set this so that even if things are not long enough the values are
150 ASN1err(ASN1_F_ASN1_GET_OBJECT
, ASN1_R_HEADER_TOO_LONG
);
154 static int asn1_get_length(const unsigned char **pp
, int *inf
, long *rl
,
157 const unsigned char *p
= *pp
;
158 unsigned long ret
= 0;
173 /* Skip leading zeroes */
174 while (i
&& *p
== 0) {
178 if (i
> sizeof(long))
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
)
269 if (constructed
== 2)
281 int ASN1_STRING_copy(ASN1_STRING
*dst
, const ASN1_STRING
*str
)
285 dst
->type
= str
->type
;
286 if (!ASN1_STRING_set(dst
, str
->data
, str
->length
))
288 dst
->flags
= str
->flags
;
292 ASN1_STRING
*ASN1_STRING_dup(const ASN1_STRING
*str
)
297 ret
= ASN1_STRING_new();
300 if (!ASN1_STRING_copy(ret
, str
)) {
301 ASN1_STRING_free(ret
);
307 int ASN1_STRING_set(ASN1_STRING
*str
, const void *_data
, int len
)
310 const char *data
= _data
;
318 if ((str
->length
< len
) || (str
->data
== NULL
)) {
321 str
->data
= OPENSSL_malloc(len
+ 1);
323 str
->data
= OPENSSL_realloc(c
, len
+ 1);
325 if (str
->data
== NULL
) {
326 ASN1err(ASN1_F_ASN1_STRING_SET
, ERR_R_MALLOC_FAILURE
);
333 memcpy(str
->data
, data
, len
);
334 /* an allowance for strings :-) */
335 str
->data
[len
] = '\0';
340 void ASN1_STRING_set0(ASN1_STRING
*str
, void *data
, int len
)
343 OPENSSL_free(str
->data
);
348 ASN1_STRING
*ASN1_STRING_new(void)
350 return (ASN1_STRING_type_new(V_ASN1_OCTET_STRING
));
353 ASN1_STRING
*ASN1_STRING_type_new(int type
)
357 ret
= (ASN1_STRING
*)OPENSSL_malloc(sizeof(ASN1_STRING
));
359 ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW
, ERR_R_MALLOC_FAILURE
);
369 void ASN1_STRING_free(ASN1_STRING
*a
)
373 if (a
->data
&& !(a
->flags
& ASN1_STRING_FLAG_NDEF
))
374 OPENSSL_free(a
->data
);
378 void ASN1_STRING_clear_free(ASN1_STRING
*a
)
382 if (a
->data
&& !(a
->flags
& ASN1_STRING_FLAG_NDEF
))
383 OPENSSL_cleanse(a
->data
, a
->length
);
387 int ASN1_STRING_cmp(const ASN1_STRING
*a
, const ASN1_STRING
*b
)
391 i
= (a
->length
- b
->length
);
393 i
= memcmp(a
->data
, b
->data
, a
->length
);
395 return (a
->type
- b
->type
);
402 int ASN1_STRING_length(const ASN1_STRING
*x
)
407 void ASN1_STRING_length_set(ASN1_STRING
*x
, int len
)
412 int ASN1_STRING_type(ASN1_STRING
*x
)
417 unsigned char *ASN1_STRING_data(ASN1_STRING
*x
)