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/* Copyright 2015 OpenMarket Ltd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "olm/utility.hh"
#include "olm/crypto.hh"
olm::Utility::Utility(
) : last_error(olm::ErrorCode::SUCCESS) {
}
size_t olm::Utility::sha256_length() {
return olm::HMAC_SHA256_OUTPUT_LENGTH;
}
size_t olm::Utility::sha256(
std::uint8_t const * input, std::size_t input_length,
std::uint8_t * output, std::size_t output_length
) {
if (output_length < sha256_length()) {
last_error = olm::ErrorCode::OUTPUT_BUFFER_TOO_SMALL;
return std::size_t(-1);
}
olm::sha256(input, input_length, output);
return 32;
}
size_t olm::Utility::ed25519_verify(
Ed25519PublicKey const & key,
std::uint8_t const * message, std::size_t message_length,
std::uint8_t const * signature, std::size_t signature_length
) {
if (signature_length < 64) {
last_error = olm::ErrorCode::BAD_MESSAGE_MAC;
return std::size_t(-1);
}
if (!olm::ed25519_verify(key, message, message_length, signature)) {
last_error = olm::ErrorCode::BAD_MESSAGE_MAC;
return std::size_t(-1);
}
return std::size_t(0);
}