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
, (int)max
))
137 if (inf
&& !(ret
& V_ASN1_CONSTRUCTED
))
140 if (*plength
> (omax
- (p
- *pp
))) {
141 ASN1err(ASN1_F_ASN1_GET_OBJECT
, ASN1_R_TOO_LONG
);
143 * Set this so that even if things are not long enough the values are
151 ASN1err(ASN1_F_ASN1_GET_OBJECT
, ASN1_R_HEADER_TOO_LONG
);
155 static int asn1_get_length(const unsigned char **pp
, int *inf
, long *rl
,
158 const unsigned char *p
= *pp
;
159 unsigned long ret
= 0;
174 /* Skip leading zeroes */
175 while (i
&& *p
== 0) {
179 if (i
> sizeof(long))
196 * class 0 is constructed constructed == 2 for indefinite length constructed
198 void ASN1_put_object(unsigned char **pp
, int constructed
, int length
, int tag
,
201 unsigned char *p
= *pp
;
204 i
= (constructed
) ? V_ASN1_CONSTRUCTED
: 0;
205 i
|= (xclass
& V_ASN1_PRIVATE
);
207 *(p
++) = i
| (tag
& V_ASN1_PRIMITIVE_TAG
);
209 *(p
++) = i
| V_ASN1_PRIMITIVE_TAG
;
210 for (i
= 0, ttag
= tag
; ttag
> 0; i
++)
221 if (constructed
== 2)
224 asn1_put_length(&p
, length
);
228 int ASN1_put_eoc(unsigned char **pp
)
230 unsigned char *p
= *pp
;
237 static void asn1_put_length(unsigned char **pp
, int length
)
239 unsigned char *p
= *pp
;
242 *(p
++) = (unsigned char)length
;
245 for (i
= 0; l
> 0; i
++)
250 p
[i
] = length
& 0xff;
258 int ASN1_object_size(int constructed
, int length
, int tag
)
270 if (constructed
== 2)
282 static int _asn1_Finish(ASN1_const_CTX
*c
)
284 if ((c
->inf
== (1 | V_ASN1_CONSTRUCTED
)) && (!c
->eos
)) {
285 if (!ASN1_const_check_infinite_end(&c
->p
, c
->slen
)) {
286 c
->error
= ERR_R_MISSING_ASN1_EOS
;
290 if (((c
->slen
!= 0) && !(c
->inf
& 1)) || ((c
->slen
< 0) && (c
->inf
& 1))) {
291 c
->error
= ERR_R_ASN1_LENGTH_MISMATCH
;
297 int asn1_Finish(ASN1_CTX
*c
)
299 return _asn1_Finish((ASN1_const_CTX
*)c
);
302 int asn1_const_Finish(ASN1_const_CTX
*c
)
304 return _asn1_Finish(c
);
307 int asn1_GetSequence(ASN1_const_CTX
*c
, long *length
)
309 const unsigned char *q
;
312 c
->inf
= ASN1_get_object(&(c
->p
), &(c
->slen
), &(c
->tag
), &(c
->xclass
),
315 c
->error
= ERR_R_BAD_GET_ASN1_OBJECT_CALL
;
318 if (c
->tag
!= V_ASN1_SEQUENCE
) {
319 c
->error
= ERR_R_EXPECTING_AN_ASN1_SEQUENCE
;
322 (*length
) -= (c
->p
- q
);
323 if (c
->max
&& (*length
< 0)) {
324 c
->error
= ERR_R_ASN1_LENGTH_MISMATCH
;
327 if (c
->inf
== (1 | V_ASN1_CONSTRUCTED
))
328 c
->slen
= *length
+ *(c
->pp
) - c
->p
;
333 int ASN1_STRING_copy(ASN1_STRING
*dst
, const ASN1_STRING
*str
)
337 dst
->type
= str
->type
;
338 if (!ASN1_STRING_set(dst
, str
->data
, str
->length
))
340 dst
->flags
= str
->flags
;
344 ASN1_STRING
*ASN1_STRING_dup(const ASN1_STRING
*str
)
349 ret
= ASN1_STRING_new();
352 if (!ASN1_STRING_copy(ret
, str
)) {
353 ASN1_STRING_free(ret
);
359 int ASN1_STRING_set(ASN1_STRING
*str
, const void *_data
, int len
)
362 const char *data
= _data
;
370 if ((str
->length
< len
) || (str
->data
== NULL
)) {
373 str
->data
= OPENSSL_malloc(len
+ 1);
375 str
->data
= OPENSSL_realloc(c
, len
+ 1);
377 if (str
->data
== NULL
) {
378 ASN1err(ASN1_F_ASN1_STRING_SET
, ERR_R_MALLOC_FAILURE
);
385 memcpy(str
->data
, data
, len
);
386 /* an allowance for strings :-) */
387 str
->data
[len
] = '\0';
392 void ASN1_STRING_set0(ASN1_STRING
*str
, void *data
, int len
)
395 OPENSSL_free(str
->data
);
400 ASN1_STRING
*ASN1_STRING_new(void)
402 return (ASN1_STRING_type_new(V_ASN1_OCTET_STRING
));
405 ASN1_STRING
*ASN1_STRING_type_new(int type
)
409 ret
= (ASN1_STRING
*)OPENSSL_malloc(sizeof(ASN1_STRING
));
411 ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW
, ERR_R_MALLOC_FAILURE
);
421 void ASN1_STRING_free(ASN1_STRING
*a
)
425 if (a
->data
&& !(a
->flags
& ASN1_STRING_FLAG_NDEF
))
426 OPENSSL_free(a
->data
);
430 void ASN1_STRING_clear_free(ASN1_STRING
*a
)
434 if (a
->data
&& !(a
->flags
& ASN1_STRING_FLAG_NDEF
))
435 OPENSSL_cleanse(a
->data
, a
->length
);
439 int ASN1_STRING_cmp(const ASN1_STRING
*a
, const ASN1_STRING
*b
)
443 i
= (a
->length
- b
->length
);
445 i
= memcmp(a
->data
, b
->data
, a
->length
);
447 return (a
->type
- b
->type
);
454 void asn1_add_error(const unsigned char *address
, int offset
)
456 char buf1
[DECIMAL_SIZE(address
) + 1], buf2
[DECIMAL_SIZE(offset
) + 1];
458 BIO_snprintf(buf1
, sizeof buf1
, "%lu", (unsigned long)address
);
459 BIO_snprintf(buf2
, sizeof buf2
, "%d", offset
);
460 ERR_add_error_data(4, "address=", buf1
, " offset=", buf2
);
463 int ASN1_STRING_length(const ASN1_STRING
*x
)
468 void ASN1_STRING_length_set(ASN1_STRING
*x
, int len
)
473 int ASN1_STRING_type(ASN1_STRING
*x
)
478 unsigned char *ASN1_STRING_data(ASN1_STRING
*x
)