cc3xx_asn1_util.h

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/*
 * Copyright (c) 2021-2022, Arm Limited. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 */
 
#ifndef CC3XX_INTERNAL_ASN1_UTIL_H
#define CC3XX_INTERNAL_ASN1_UTIL_H
 
#include <psa/crypto.h>
#include <stdint.h>
 
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define CC3XX_TAG_ASN1_INTEGER 0x02
#define CC3XX_TAG_ASN1_SEQUENCE 0x10
#define CC3XX_TAG_ASN1_CONSTRUCTED 0x20
 
int cc3xx_asn1_write_len(unsigned char **p, const unsigned char *start, size_t len);
 
int cc3xx_asn1_write_tag(unsigned char **p, const unsigned char *start,
                         unsigned char tag);
 
int cc3xx_asn1_write_big_integer(unsigned char **p, const unsigned char *start,
                                 uint8_t *data, size_t data_size);
 
int cc3xx_asn1_write_int(unsigned char **p, unsigned char *start, int val);
 
psa_status_t cc3xx_asn1_get_tag(unsigned char **p, const unsigned char *end, size_t *len,
                       int tag);
 
psa_status_t cc3xx_asn1_get_len(unsigned char **p, const unsigned char *end,
                       size_t *len);
 
psa_status_t cc3xx_asn1_get_int(unsigned char **p, const unsigned char *end, int *val);
 
#ifdef __cplusplus
}
#endif
#endif /* CC3XX_INTERNAL_ASN1_UTIL_H */