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Add BLAKE3 hashing algorithm

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This uses the single-threaded C-based routines from libblake3.

This is not optimal performance-wise but should be a good starting point
for nix compatibility with BLAKE3 hashing until a more performant
implementation based on the multi-threaded BLAKE3 routines
(written in Rust) can be developed.
This commit is contained in:
silvanshade 2025-01-29 12:24:37 -07:00
parent a562d0b6ce
commit 1f56ea4c72
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9 changed files with 89 additions and 18 deletions
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9
src/libutil/hash.hh
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@ -1,6 +1,7 @@
#pragma once
///@file
#include "config.hh"
#include "types.hh"
#include "serialise.hh"
#include "file-system.hh"
@ -11,9 +12,9 @@ namespace nix {
MakeError(BadHash, Error);
enum struct HashAlgorithm : char { MD5 = 42, SHA1, SHA256, SHA512 };
enum struct HashAlgorithm : char { MD5 = 42, SHA1, SHA256, SHA512, BLAKE3 };
const int blake3HashSize = 32;
const int md5HashSize = 16;
const int sha1HashSize = 20;
const int sha256HashSize = 32;
@ -52,7 +53,7 @@ struct Hash
/**
* Create a zero-filled hash object.
*/
explicit Hash(HashAlgorithm algo);
explicit Hash(HashAlgorithm algo, const ExperimentalFeatureSettings & xpSettings = experimentalFeatureSettings);
/**
* Parse the hash from a string representation in the format
@ -157,7 +158,7 @@ std::string printHash16or32(const Hash & hash);
/**
* Compute the hash of the given string.
*/
Hash hashString(HashAlgorithm ha, std::string_view s);
Hash hashString(HashAlgorithm ha, std::string_view s, const ExperimentalFeatureSettings & xpSettings = experimentalFeatureSettings);
/**
* Compute the hash of the given file, hashing its contents directly.