mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-13 19:18:56 +00:00
54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
/**
|
|
* Copyright (c) 2023 Trezor Company s.r.o.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT HMAC_SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
|
|
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef __DER_H
|
|
#define __DER_H
|
|
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include "buffer.h"
|
|
#include "options.h"
|
|
|
|
#define DER_SEQUENCE 0x30
|
|
#define DER_INTEGER 0x02
|
|
#define DER_BIT_STRING 0x03
|
|
#define DER_OCTET_STRING 0x04
|
|
|
|
// Struct representing a DER-encoded ASN.1 data value.
|
|
typedef struct {
|
|
// Single-octet identifier encoding the ASN.1 class, type and tag number.
|
|
uint8_t id;
|
|
// A buffer containing the entire DER encoding of the data value including the
|
|
// tag and length, but with the position indicator initialized to the offset
|
|
// of the contents octets.
|
|
BUFFER_READER buf;
|
|
} DER_ITEM;
|
|
|
|
bool __wur der_read_length(BUFFER_READER *buf, size_t *len);
|
|
bool __wur der_write_length(BUFFER_WRITER *buf, size_t len);
|
|
bool __wur der_read_item(BUFFER_READER *buf, DER_ITEM *item);
|
|
bool __wur der_reencode_int(BUFFER_READER *reader, BUFFER_WRITER *writer);
|
|
|
|
#endif // __DER_H
|