1/* Copyright 2015 OpenMarket Ltd
2 *
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include "olm/utility.hh"
17#include "olm/crypto.h"
18
19
20olm::Utility::Utility(
21) : last_error(OlmErrorCode::OLM_SUCCESS) {
22}
23
24
25size_t olm::Utility::sha256_length() const {
26 return SHA256_OUTPUT_LENGTH;
27}
28
29
30size_t olm::Utility::sha256(
31 std::uint8_t const * input, std::size_t input_length,
32 std::uint8_t * output, std::size_t output_length
33) {
34 if (output_length < sha256_length()) {
35 last_error = OlmErrorCode::OLM_OUTPUT_BUFFER_TOO_SMALL;
36 return std::size_t(-1);
37 }
38 _olm_crypto_sha256(input, input_length, output);
39 return SHA256_OUTPUT_LENGTH;
40}
41
42
43size_t olm::Utility::ed25519_verify(
44 _olm_ed25519_public_key const & key,
45 std::uint8_t const * message, std::size_t message_length,
46 std::uint8_t const * signature, std::size_t signature_length
47) {
48 if (signature_length < ED25519_SIGNATURE_LENGTH) {
49 last_error = OlmErrorCode::OLM_BAD_MESSAGE_MAC;
50 return std::size_t(-1);
51 }
52 if (!_olm_crypto_ed25519_verify(their_key: &key, message, message_length, signature)) {
53 last_error = OlmErrorCode::OLM_BAD_MESSAGE_MAC;
54 return std::size_t(-1);
55 }
56 return std::size_t(0);
57}
58