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adds hash domain to merkle shreds (#29339)

This commit is contained in:
behzad nouri 2023-02-15 21:46:30 +00:00 committed by GitHub
parent cf0a149add
commit 06bb71c79f
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 5 additions and 5 deletions
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6
ledger/src/shred/merkle.rs
View File

@ -41,8 +41,10 @@ const_assert_eq!(ShredData::SIZE_OF_PAYLOAD, 1203);
// Defense against second preimage attack:
// https://en.wikipedia.org/wiki/Merkle_tree#Second_preimage_attack
const MERKLE_HASH_PREFIX_LEAF: &[u8] = &[0x00];
const MERKLE_HASH_PREFIX_NODE: &[u8] = &[0x01];
// Following Certificate Transparency, 0x00 and 0x01 bytes are prepended to
// hash data when computing leaf and internal node hashes respectively.
const MERKLE_HASH_PREFIX_LEAF: &[u8] = b"\x00SOLANA_MERKLE_SHREDS_LEAF";
const MERKLE_HASH_PREFIX_NODE: &[u8] = b"\x01SOLANA_MERKLE_SHREDS_NODE";
type MerkleProofEntry = [u8; 20];

4
ledger/src/shredder.rs
View File

@ -7,7 +7,7 @@ use {
lru::LruCache,
rayon::{prelude::*, ThreadPool},
reed_solomon_erasure::{
galois_8::Field,
galois_8::ReedSolomon,
Error::{InvalidIndex, TooFewDataShards, TooFewShardsPresent},
},
solana_entry::entry::Entry,
@ -38,8 +38,6 @@ pub(crate) const ERASURE_BATCH_SIZE: [usize; 33] = [
55, 56, 58, 59, 60, 62, 63, 64, // 32
];
type ReedSolomon = reed_solomon_erasure::ReedSolomon<Field>;
pub struct ReedSolomonCache(
Mutex<LruCache<(/*data_shards:*/ usize, /*parity_shards:*/ usize), Arc<ReedSolomon>>>,
);