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/*
* Copyright (C) 2011-2012 ANSSI
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file
*
* \author Pierre Chifflier <pierre.chifflier@ssi.gouv.fr>
*
*/
#ifndef __UTIL_DECODE_DER_H__
#define __UTIL_DECODE_DER_H__
#define ASN1_CLASS_UNIVERSAL 0
#define ASN1_CLASS_APPLICATION 1
#define ASN1_CLASS_CONTEXTSPEC 2
#define ASN1_CLASS_PRIVATE 3
#define ASN1_UNKNOWN 0
#define ASN1_BOOLEAN 0x01
#define ASN1_INTEGER 0x02
#define ASN1_BITSTRING 0x03
#define ASN1_OCTETSTRING 0x04
#define ASN1_NULL 0x05
#define ASN1_OID 0x06
#define ASN1_UTF8STRING 0x0c
#define ASN1_SEQUENCE 0x10
#define ASN1_SET 0x11
#define ASN1_PRINTSTRING 0x13
#define ASN1_T61STRING 0x14
#define ASN1_IA5STRING 0x16
#define ASN1_UTCTIME 0x17
typedef struct Asn1ElementType_ {
uint8_t cls:2;
uint8_t pc:1;
uint8_t tag:5;
} __attribute__((packed)) Asn1ElementType;
/* Generic ASN.1 element
* Presence and meaning of fields depends on the header and type values.
*/
typedef struct Asn1Generic_ {
Asn1ElementType header;
uint8_t type;
uint32_t length; /* length of node, including header */
struct Asn1Generic_ *data; /* only if type is structured */
char *str;
uint32_t strlen;
uint64_t value;
struct Asn1Generic_ *next; /* only if type is sequence */
} Asn1Generic;
/* Generic error */
#define ERR_DER_GENERIC 0x01
/* Unknown ASN.1 element type */
#define ERR_DER_UNKNOWN_ELEMENT 0x02
/* One element requires to read more bytes than available */
#define ERR_DER_ELEMENT_SIZE_TOO_BIG 0x03
/* One element size is invalid (more than 4 bytes long) */
#define ERR_DER_INVALID_SIZE 0x04
/* Unsupported string type */
#define ERR_DER_UNSUPPORTED_STRING 0x05
/* Missing field or element */
#define ERR_DER_MISSING_ELEMENT 0x06
Asn1Generic * DecodeDer(const unsigned char *buffer, uint32_t size, uint32_t *errcode);
void DerFree(Asn1Generic *a);
#endif /* __UTIL_DECODE_DER_H__ */
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