/* 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; }