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// Copyright 2015 The Weave Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UW_LIBUWEAVE_SRC_MACAROON_ENCODING_
#define UW_LIBUWEAVE_SRC_MACAROON_ENCODING_
/*
* Utility functions to encode and decode canonical CBOR representations for
* cryptographic use, such as signatures. We only need to support a very small
* subset of the CBOR standard, since only these are used in our cryptographic
* designs. The supported data types are: unsigned integers (maximum 32 bits),
* byte strings, text strings, and arrays.
*/
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
// Get the number of bytes that is occupied by the first data item in the give
// CBOR string.
bool uw_macaroon_encoding_get_item_len_(const uint8_t* cbor, size_t cbor_len,
size_t* first_item_len);
bool uw_macaroon_encoding_encode_uint_(const uint32_t unsigned_int,
uint8_t* buffer, size_t buffer_size,
size_t* resulting_cbor_len);
bool uw_macaroon_encoding_encode_array_len_(const uint32_t array_len,
uint8_t* buffer, size_t buffer_size,
size_t* resulting_cbor_len);
bool uw_macaroon_encoding_encode_byte_str_(const uint8_t* str, size_t str_len,
uint8_t* buffer, size_t buffer_size,
size_t* resulting_cbor_len);
bool uw_macaroon_encoding_encode_text_str_(const uint8_t* str, size_t str_len,
uint8_t* buffer, size_t buffer_size,
size_t* resulting_cbor_len);
bool uw_macaroon_encoding_decode_uint_(const uint8_t* cbor, size_t cbor_len,
uint32_t* unsigned_int);
bool uw_macaroon_encoding_decode_array_len_(const uint8_t* cbor,
size_t cbor_len, uint32_t* array_len);
bool uw_macaroon_encoding_decode_byte_str_(const uint8_t* cbor, size_t cbor_len,
const uint8_t** str,
size_t* str_len);
bool uw_macaroon_encoding_decode_text_str_(const uint8_t* cbor, size_t cbor_len,
const uint8_t** str,
size_t* str_len);
#endif // UW_LIBUWEAVE_SRC_MACAROON_ENCODING_
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