99d423f10c
Add an ANS.1 DER decoder which is used to parse asymmetric cipher keys Signed-off-by: zhenwei pi <pizhenwei@bytedance.com> Signed-off-by: lei he <helei.sig11@bytedance.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
82 lines
2.9 KiB
C
82 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2022 Bytedance
|
|
* Author: lei he <helei.sig11@bytedance.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef QCRYPTO_ASN1_DECODER_H
|
|
#define QCRYPTO_ASN1_DECODER_H
|
|
|
|
#include "qapi/error.h"
|
|
|
|
/* Simple decoder used to parse DER encoded rsa keys. */
|
|
|
|
/**
|
|
* @opaque: user context.
|
|
* @value: the starting address of |value| part of 'Tag-Length-Value' pattern.
|
|
* @vlen: length of the |value|.
|
|
* Returns: 0 for success, any other value is considered an error.
|
|
*/
|
|
typedef int (*QCryptoDERDecodeCb) (void *opaque, const uint8_t *value,
|
|
size_t vlen, Error **errp);
|
|
|
|
/**
|
|
* qcrypto_der_decode_int:
|
|
* @data: pointer to address of input data
|
|
* @dlen: pointer to length of input data
|
|
* @cb: callback invoked when decode succeed, if cb equals NULL, no
|
|
* callback will be invoked
|
|
* @opaque: parameter passed to cb
|
|
*
|
|
* Decode integer from DER-encoded data.
|
|
*
|
|
* Returns: On success, *data points to rest data, and *dlen
|
|
* will be set to the rest length of data, if cb is not NULL, must
|
|
* return 0 to make decode success, at last, the length of the data
|
|
* part of the decoded INTEGER will be returned. Otherwise, -1 is
|
|
* returned.
|
|
*/
|
|
int qcrypto_der_decode_int(const uint8_t **data,
|
|
size_t *dlen,
|
|
QCryptoDERDecodeCb cb,
|
|
void *opaque,
|
|
Error **errp);
|
|
|
|
/**
|
|
* qcrypto_der_decode_seq:
|
|
*
|
|
* Decode sequence from DER-encoded data, similar with der_decode_int.
|
|
*
|
|
* @data: pointer to address of input data
|
|
* @dlen: pointer to length of input data
|
|
* @cb: callback invoked when decode succeed, if cb equals NULL, no
|
|
* callback will be invoked
|
|
* @opaque: parameter passed to cb
|
|
*
|
|
* Returns: On success, *data points to rest data, and *dlen
|
|
* will be set to the rest length of data, if cb is not NULL, must
|
|
* return 0 to make decode success, at last, the length of the data
|
|
* part of the decoded SEQUENCE will be returned. Otherwise, -1 is
|
|
* returned.
|
|
*/
|
|
int qcrypto_der_decode_seq(const uint8_t **data,
|
|
size_t *dlen,
|
|
QCryptoDERDecodeCb cb,
|
|
void *opaque,
|
|
Error **errp);
|
|
|
|
#endif /* QCRYPTO_ASN1_DECODER_H */
|