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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/memory.hh"
#include "olm/memory.h"
void _olm_unset(
void volatile * buffer, size_t buffer_length
) {
olm::unset(buffer, buffer_length);
}
void olm::unset(
void volatile * buffer, std::size_t buffer_length
) {
char volatile * pos = reinterpret_cast<char volatile *>(buffer);
char volatile * end = pos + buffer_length;
while (pos != end) {
*(pos++) = 0;
}
}
bool olm::is_equal(
std::uint8_t const * buffer_a,
std::uint8_t const * buffer_b,
std::size_t length
) {
std::uint8_t volatile result = 0;
while (length--) {
result |= (*(buffer_a++)) ^ (*(buffer_b++));
}
return result == 0;
}
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