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- /*
- * Copyright (c) 2020, Ali Mohammad Pur <mpfard@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #pragma once
- #include <LibCrypto/Hash/HashFunction.h>
- #ifndef KERNEL
- # include <AK/ByteString.h>
- #endif
- namespace Crypto::Hash {
- namespace SHA1Constants {
- constexpr static u32 InitializationHashes[5] { 0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0 };
- constexpr static u32 RoundConstants[4] {
- 0X5a827999,
- 0X6ed9eba1,
- 0X8f1bbcdc,
- 0Xca62c1d6,
- };
- }
- class SHA1 final : public HashFunction<512, 160> {
- public:
- using HashFunction::update;
- SHA1()
- {
- reset();
- }
- virtual void update(u8 const*, size_t) override;
- virtual DigestType digest() override;
- virtual DigestType peek() override;
- static DigestType hash(u8 const* data, size_t length)
- {
- SHA1 sha;
- sha.update(data, length);
- return sha.digest();
- }
- static DigestType hash(ByteBuffer const& buffer) { return hash(buffer.data(), buffer.size()); }
- static DigestType hash(StringView buffer) { return hash((u8 const*)buffer.characters_without_null_termination(), buffer.length()); }
- #ifndef KERNEL
- virtual ByteString class_name() const override
- {
- return "SHA1";
- }
- #endif
- virtual void reset() override
- {
- m_data_length = 0;
- m_bit_length = 0;
- for (auto i = 0; i < 5; ++i)
- m_state[i] = SHA1Constants::InitializationHashes[i];
- }
- private:
- inline void transform(u8 const*);
- u8 m_data_buffer[BlockSize] {};
- size_t m_data_length { 0 };
- u64 m_bit_length { 0 };
- u32 m_state[5];
- constexpr static auto FinalBlockDataSize = BlockSize - 8;
- constexpr static auto Rounds = 80;
- };
- }
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