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/*
* Copyright (c) 2020, Ali Mohammad Pur <ali.mpfard@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/ByteBuffer.h>
#include <AK/StringView.h>
#include <AK/Types.h>
namespace Crypto {
namespace Hash {
template<size_t BlockS, typename DigestT>
class HashFunction {
public:
static constexpr auto BlockSize = BlockS / 8;
static constexpr auto DigestSize = DigestT::Size;
using DigestType = DigestT;
static size_t block_size() { return BlockSize; };
static size_t digest_size() { return DigestSize; };
virtual void update(const u8*, size_t) = 0;
void update(const Bytes& buffer) { update(buffer.data(), buffer.size()); };
void update(const ReadonlyBytes& buffer) { update(buffer.data(), buffer.size()); };
void update(const ByteBuffer& buffer) { update(buffer.data(), buffer.size()); };
void update(const StringView& string) { update((const u8*)string.characters_without_null_termination(), string.length()); };
virtual DigestType peek() = 0;
virtual DigestType digest() = 0;
virtual void reset() = 0;
virtual String class_name() const = 0;
};
}
}
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