asn1.h revision 8d520ff1dc2da35cdca849e982051b86468016d8 
1/*
2 * ASN.1 DER parsing
3 * Copyright (c) 2006, Jouni Malinen <j@w1.fi>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
11 *
12 * See README and COPYING for more details.
13 */
14
15#ifndef ASN1_H
16#define ASN1_H
17
18#define ASN1_TAG_EOC		0x00 /* not used with DER */
19#define ASN1_TAG_BOOLEAN	0x01
20#define ASN1_TAG_INTEGER	0x02
21#define ASN1_TAG_BITSTRING	0x03
22#define ASN1_TAG_OCTETSTRING	0x04
23#define ASN1_TAG_NULL		0x05
24#define ASN1_TAG_OID		0x06
25#define ASN1_TAG_OBJECT_DESCRIPTOR	0x07 /* not yet parsed */
26#define ASN1_TAG_EXTERNAL	0x08 /* not yet parsed */
27#define ASN1_TAG_REAL		0x09 /* not yet parsed */
28#define ASN1_TAG_ENUMERATED	0x0A /* not yet parsed */
29#define ASN1_TAG_UTF8STRING	0x0C /* not yet parsed */
30#define ANS1_TAG_RELATIVE_OID	0x0D
31#define ASN1_TAG_SEQUENCE	0x10 /* shall be constructed */
32#define ASN1_TAG_SET		0x11
33#define ASN1_TAG_NUMERICSTRING	0x12 /* not yet parsed */
34#define ASN1_TAG_PRINTABLESTRING	0x13
35#define ASN1_TAG_TG1STRING	0x14 /* not yet parsed */
36#define ASN1_TAG_VIDEOTEXSTRING	0x15 /* not yet parsed */
37#define ASN1_TAG_IA5STRING	0x16
38#define ASN1_TAG_UTCTIME	0x17
39#define ASN1_TAG_GENERALIZEDTIME	0x18 /* not yet parsed */
40#define ASN1_TAG_GRAPHICSTRING	0x19 /* not yet parsed */
41#define ASN1_TAG_VISIBLESTRING	0x1A
42#define ASN1_TAG_GENERALSTRING	0x1B /* not yet parsed */
43#define ASN1_TAG_UNIVERSALSTRING	0x1C /* not yet parsed */
44#define ASN1_TAG_BMPSTRING	0x1D /* not yet parsed */
45
46#define ASN1_CLASS_UNIVERSAL		0
47#define ASN1_CLASS_APPLICATION		1
48#define ASN1_CLASS_CONTEXT_SPECIFIC	2
49#define ASN1_CLASS_PRIVATE		3
50
51
52struct asn1_hdr {
53	const u8 *payload;
54	u8 identifier, class, constructed;
55	unsigned int tag, length;
56};
57
58#define ASN1_MAX_OID_LEN 20
59struct asn1_oid {
60	unsigned long oid[ASN1_MAX_OID_LEN];
61	size_t len;
62};
63
64
65int asn1_get_next(const u8 *buf, size_t len, struct asn1_hdr *hdr);
66int asn1_parse_oid(const u8 *buf, size_t len, struct asn1_oid *oid);
67int asn1_get_oid(const u8 *buf, size_t len, struct asn1_oid *oid,
68		 const u8 **next);
69void asn1_oid_to_str(struct asn1_oid *oid, char *buf, size_t len);
70unsigned long asn1_bit_string_to_long(const u8 *buf, size_t len);
71
72#endif /* ASN1_H */
73