| // 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_ |