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asn1.h 4.12 KiB
/* asn1.h
Limited support for ASN.1 DER decoding.
Copyright (C) 2005 Niels Möller
This file is part of GNU Nettle.
GNU Nettle is free software: you can redistribute it and/or
modify it under the terms of either:
* the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your
option) any later version.
or
* the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version.
or both in parallel, as here.
GNU Nettle is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received copies of the GNU General Public License and
the GNU Lesser General Public License along with this program. If
not, see http://www.gnu.org/licenses/.
*/
#ifndef NETTLE_ASN1_H_INCLUDED
#define NETTLE_ASN1_H_INCLUDED
#include "nettle-types.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Name mangling */
#define asn1_der_iterator_first nettle_asn1_der_iterator_first
#define asn1_der_iterator_next nettle_asn1_der_iterator_next
#define asn1_der_decode_constructed nettle_asn1_der_decode_constructed
#define asn1_der_decode_constructed_last nettle_asn1_der_decode_constructed_last
#define asn1_der_decode_bitstring nettle_asn1_der_decode_bitstring
#define asn1_der_decode_bitstring_last nettle_asn1_der_decode_bitstring_last
#define asn1_der_get_uint32 nettle_asn1_der_get_uint32
#define asn1_der_get_bignum nettle_asn1_der_get_bignum
/* enum asn1_type keeps the class number and the constructive in bits
13-14, and the constructive flag in bit 12. The remaining 14 bits
are the tag (although currently, only tags in the range 0-30 are
supported). */
enum
{
ASN1_TYPE_CONSTRUCTED = 1 << 12,
ASN1_CLASS_UNIVERSAL = 0,
ASN1_CLASS_APPLICATION = 1 << 13,
ASN1_CLASS_CONTEXT_SPECIFIC = 2 << 13,
ASN1_CLASS_PRIVATE = 3 << 13,
ASN1_CLASS_MASK = 3 << 13,
ASN1_CLASS_SHIFT = 13,
};