ladybird/AK/SipHash.h
kleines Filmröllchen 9a026fc8d5 AK: Implement SipHash as the default hash algorithm for most use cases
SipHash is highly HashDoS-resistent, initialized with a random seed at
startup (i.e. non-deterministic) and usable for security-critical use
cases with large enough parameters. We just use it because it's
reasonably secure with parameters 1-3 while having excellent properties
and not being significantly slower than before.
2023-10-01 11:06:36 +03:30

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C++

/*
* Copyright (c) 2023, kleines Filmröllchen <filmroellchen@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Forward.h>
namespace AK {
// Ported from the SipHash reference implementation, released to the public domain:
// https://github.com/veorq/SipHash/blob/eee7d0d84dc7731df2359b243aa5e75d85f6eaef/siphash.c
// The standard is SipHash-2-4, but we use 1-3 for a little more speed.
// Cryptography should use 4-8 for (relative) conservative security,
// though SipHash itself is NOT a cryptographically secure hash algorithm.
template<size_t message_block_rounds, size_t finalization_rounds>
u64 sip_hash_bytes(ReadonlyBytes input);
unsigned standard_sip_hash(u64 input);
unsigned secure_sip_hash(u64 input);
}
#ifdef USING_AK_GLOBALLY
using AK::secure_sip_hash;
using AK::sip_hash_bytes;
using AK::standard_sip_hash;
#endif