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AK: Implement SipHash as the default hash algorithm for most use cases

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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.
This commit is contained in:
kleines Filmröllchen 2023-09-21 00:14:35 +02:00 • committed by Ali Mohammad Pur
parent 5e15c29e22
commit 9a026fc8d5
9 changed files with 282 additions and 11 deletions
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4
AK/StringHash.h
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@ -10,6 +10,10 @@
namespace AK {
// FIXME: This hashing algorithm isn't well-known and may not be good at all.
// We can't use SipHash since that depends on runtime parameters,
// but some string hashes like IPC endpoint magic numbers need to be deterministic.
// Maybe use a SipHash with a statically-known key?
constexpr u32 string_hash(char const* characters, size_t length, u32 seed = 0)
{
u32 hash = seed;