70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/*
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* ASN.1 DER parsing
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* Copyright (c) 2006, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#ifndef ASN1_H
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#define ASN1_H
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#define ASN1_TAG_EOC 0x00 /* not used with DER */
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#define ASN1_TAG_BOOLEAN 0x01
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#define ASN1_TAG_INTEGER 0x02
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#define ASN1_TAG_BITSTRING 0x03
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#define ASN1_TAG_OCTETSTRING 0x04
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#define ASN1_TAG_NULL 0x05
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#define ASN1_TAG_OID 0x06
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#define ASN1_TAG_OBJECT_DESCRIPTOR 0x07 /* not yet parsed */
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#define ASN1_TAG_EXTERNAL 0x08 /* not yet parsed */
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#define ASN1_TAG_REAL 0x09 /* not yet parsed */
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#define ASN1_TAG_ENUMERATED 0x0A /* not yet parsed */
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#define ASN1_TAG_UTF8STRING 0x0C /* not yet parsed */
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#define ANS1_TAG_RELATIVE_OID 0x0D
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#define ASN1_TAG_SEQUENCE 0x10 /* shall be constructed */
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#define ASN1_TAG_SET 0x11
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#define ASN1_TAG_NUMERICSTRING 0x12 /* not yet parsed */
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#define ASN1_TAG_PRINTABLESTRING 0x13
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#define ASN1_TAG_TG1STRING 0x14 /* not yet parsed */
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#define ASN1_TAG_VIDEOTEXSTRING 0x15 /* not yet parsed */
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#define ASN1_TAG_IA5STRING 0x16
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#define ASN1_TAG_UTCTIME 0x17
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#define ASN1_TAG_GENERALIZEDTIME 0x18 /* not yet parsed */
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#define ASN1_TAG_GRAPHICSTRING 0x19 /* not yet parsed */
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#define ASN1_TAG_VISIBLESTRING 0x1A
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#define ASN1_TAG_GENERALSTRING 0x1B /* not yet parsed */
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#define ASN1_TAG_UNIVERSALSTRING 0x1C /* not yet parsed */
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#define ASN1_TAG_BMPSTRING 0x1D /* not yet parsed */
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#define ASN1_CLASS_UNIVERSAL 0
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#define ASN1_CLASS_APPLICATION 1
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#define ASN1_CLASS_CONTEXT_SPECIFIC 2
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#define ASN1_CLASS_PRIVATE 3
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struct asn1_hdr {
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const u8 *payload;
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u8 identifier, class, constructed;
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unsigned int tag, length;
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};
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#define ASN1_MAX_OID_LEN 20
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struct asn1_oid {
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unsigned long oid[ASN1_MAX_OID_LEN];
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size_t len;
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};
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int asn1_get_next(const u8 *buf, size_t len, struct asn1_hdr *hdr);
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int asn1_parse_oid(const u8 *buf, size_t len, struct asn1_oid *oid);
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int asn1_get_oid(const u8 *buf, size_t len, struct asn1_oid *oid,
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const u8 **next);
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void asn1_oid_to_str(const struct asn1_oid *oid, char *buf, size_t len);
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unsigned long asn1_bit_string_to_long(const u8 *buf, size_t len);
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int asn1_oid_equal(const struct asn1_oid *a, const struct asn1_oid *b);
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extern struct asn1_oid asn1_sha1_oid;
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extern struct asn1_oid asn1_sha256_oid;
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#endif /* ASN1_H */
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