mirror of https://git.matrix.org/git/olm.git
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/* Copyright 2015 OpenMarket Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "olm/memory.hh"
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#include "olm/memory.h"
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void _olm_unset(
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void volatile * buffer, size_t buffer_length
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) {
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olm::unset(buffer, buffer_length);
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}
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void olm::unset(
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void volatile * buffer, std::size_t buffer_length
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) {
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char volatile * pos = reinterpret_cast<char volatile *>(buffer);
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char volatile * end = pos + buffer_length;
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while (pos != end) {
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*(pos++) = 0;
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}
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}
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bool olm::is_equal(
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std::uint8_t const * buffer_a,
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std::uint8_t const * buffer_b,
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std::size_t length
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) {
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std::uint8_t volatile result = 0;
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while (length--) {
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result |= (*(buffer_a++)) ^ (*(buffer_b++));
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}
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return result == 0;
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}
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