This is an archive of the discontinued Mercurial Phabricator instance.

Differential D10835

rust: Use a maintained crate for SHA-1 hashing
ClosedPublic

Authored by SimonSapin on Jun 4 2021, 5:02 AM.

Details

Reviewers
Alphare
Group Reviewers
hg-reviewers
Commits
rHGfad504cfc94b: rust: Use a maintained crate for SHA-1 hashing
Summary

https://crates.io/crates/rust-crypto hasn’t been updated in 5 years.
This doesn’t neccesarily mean there’s anything wrong with it, but if
something comes up it’s preferable to rely on libraries that have active
maintainers.

Use https://crates.io/crates/sha-1 from https://github.com/RustCrypto instead

Diff Detail

Repository
rHG Mercurial
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

SimonSapin created this revision.Jun 4 2021, 5:02 AM
baymax updated this revision to Diff 28437.Jun 4 2021, 7:23 AM

✅ refresh by Heptapod after a successful CI run (🐙 💚)

Alphare accepted this revision.Jun 4 2021, 8:45 AM
This revision is now accepted and ready to land.Jun 4 2021, 8:45 AM
SimonSapin added a commit: rHGfad504cfc94b: rust: Use a maintained crate for SHA-1 hashing.Jun 7 2021, 3:45 AM
Closed by commit rHGfad504cfc94b: rust: Use a maintained crate for SHA-1 hashing (authored by SimonSapin). · Explain Why
This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

Diff 28468

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rand = "0.7.3" rand = "0.7.3"
rand_pcg = "0.2.1" rand_pcg = "0.2.1"
rand_distr = "0.2.2" rand_distr = "0.2.2"
rayon = "1.3.0" rayon = "1.3.0"
regex = "1.3.9" regex = "1.3.9"
sha-1 = "0.9.6"
twox-hash = "1.5.0" twox-hash = "1.5.0"
same-file = "1.0.6" same-file = "1.0.6"
tempfile = "3.1.0" tempfile = "3.1.0"
crossbeam-channel = "0.4" crossbeam-channel = "0.4"
micro-timer = "0.3.0" micro-timer = "0.3.0"
log = "0.4.8" log = "0.4.8"
memmap = "0.7.0" memmap = "0.7.0"
zstd = "0.5.3" zstd = "0.5.3"
rust-crypto = "0.2.36"
format-bytes = "0.2.2" format-bytes = "0.2.2"
# We don't use the `miniz-oxide` backend to not change rhg benchmarks and until # We don't use the `miniz-oxide` backend to not change rhg benchmarks and until
# we have a clearer view of which backend is the fastest. # we have a clearer view of which backend is the fastest.
[dependencies.flate2] [dependencies.flate2]
version = "1.0.16" version = "1.0.16"
features = ["zlib"] features = ["zlib"]
default-features = false default-features = false
[dev-dependencies] [dev-dependencies]
clap = "*" clap = "*"
pretty_assertions = "0.6.1" pretty_assertions = "0.6.1"

rust/hg-core/src/revlog/path_encode.rs

use crypto::digest::Digest; use sha1::{Digest, Sha1};
use crypto::sha1::Sha1;
#[derive(PartialEq, Debug)] #[derive(PartialEq, Debug)]
#[allow(non_camel_case_types)] #[allow(non_camel_case_types)]
enum path_state { enum path_state {
START, /* first byte of a path component */ START, /* first byte of a path component */
A, /* "AUX" */ A, /* "AUX" */
AU, AU,
THIRD, /* third of a 3-byte sequence, e.g. "AUX", "NUL" */ THIRD, /* third of a 3-byte sequence, e.g. "AUX", "NUL" */
let dired = &mut [0; MAXENCODE]; let dired = &mut [0; MAXENCODE];
let lowered = &mut [0; MAXENCODE]; let lowered = &mut [0; MAXENCODE];
let auxed = &mut [0; MAXENCODE]; let auxed = &mut [0; MAXENCODE];
let baselen = (src.len() - 5) * 3; let baselen = (src.len() - 5) * 3;
if baselen >= MAXENCODE { if baselen >= MAXENCODE {
panic!("path_encode::hash_encore: string too long: {}", baselen) panic!("path_encode::hash_encore: string too long: {}", baselen)
}; };
let dirlen = encode_dir(Some(&mut dired[..]), src); let dirlen = encode_dir(Some(&mut dired[..]), src);
let sha = { let sha = Sha1::digest(&dired[..dirlen]);
let mut hasher = Sha1::new();
hasher.input(&dired[..dirlen]);
let mut hash = vec![0; 20];
hasher.result(&mut hash);
hash
};
let lowerlen = lower_encode(Some(&mut lowered[..]), &dired[..dirlen][5..]); let lowerlen = lower_encode(Some(&mut lowered[..]), &dired[..dirlen][5..]);
let auxlen = aux_encode(Some(&mut auxed[..]), &lowered[..lowerlen]); let auxlen = aux_encode(Some(&mut auxed[..]), &lowered[..lowerlen]);
hash_mangle(&auxed[..auxlen], &sha) hash_mangle(&auxed[..auxlen], &sha)
} }
pub fn path_encode(path: &[u8]) -> Vec<u8> { pub fn path_encode(path: &[u8]) -> Vec<u8> {
let newlen = if path.len() <= MAXSTOREPATHLEN { let newlen = if path.len() <= MAXSTOREPATHLEN {
basic_encode(None, path) basic_encode(None, path)

rust/hg-core/src/revlog/revlog.rs

use std::borrow::Cow; use std::borrow::Cow;
use std::io::Read; use std::io::Read;
use std::ops::Deref; use std::ops::Deref;
use std::path::Path; use std::path::Path;
use byteorder::{BigEndian, ByteOrder}; use byteorder::{BigEndian, ByteOrder};
use crypto::digest::Digest;
use crypto::sha1::Sha1;
use flate2::read::ZlibDecoder; use flate2::read::ZlibDecoder;
use micro_timer::timed; use micro_timer::timed;
use sha1::{Digest, Sha1};
use zstd; use zstd;
use super::index::Index; use super::index::Index;
use super::node::{NodePrefix, NODE_BYTES_LENGTH, NULL_NODE}; use super::node::{NodePrefix, NODE_BYTES_LENGTH, NULL_NODE};
use super::nodemap; use super::nodemap;
use super::nodemap::{NodeMap, NodeMapError}; use super::nodemap::{NodeMap, NodeMapError};
use super::nodemap_docket::NodeMapDocket; use super::nodemap_docket::NodeMapDocket;
use super::patch; use super::patch;
None => &NULL_NODE, None => &NULL_NODE,
}; };
let e2 = self.index.get_entry(p2); let e2 = self.index.get_entry(p2);
let h2 = match e2 { let h2 = match e2 {
Some(ref entry) => entry.hash(), Some(ref entry) => entry.hash(),
None => &NULL_NODE, None => &NULL_NODE,
}; };
hash(data, h1.as_bytes(), h2.as_bytes()).as_slice() == expected &hash(data, h1.as_bytes(), h2.as_bytes()) == expected
} }
/// Build the full data of a revision out its snapshot /// Build the full data of a revision out its snapshot
/// and its deltas. /// and its deltas.
#[timed] #[timed]
fn build_data_from_deltas( fn build_data_from_deltas(
snapshot: RevlogEntry, snapshot: RevlogEntry,
deltas: &[RevlogEntry], deltas: &[RevlogEntry],
} }
/// Format version of the revlog. /// Format version of the revlog.
pub fn get_version(index_bytes: &[u8]) -> u16 { pub fn get_version(index_bytes: &[u8]) -> u16 {
BigEndian::read_u16(&index_bytes[2..=3]) BigEndian::read_u16(&index_bytes[2..=3])
} }
/// Calculate the hash of a revision given its data and its parents. /// Calculate the hash of a revision given its data and its parents.
fn hash(data: &[u8], p1_hash: &[u8], p2_hash: &[u8]) -> Vec<u8> { fn hash(
data: &[u8],
p1_hash: &[u8],
p2_hash: &[u8],
) -> [u8; NODE_BYTES_LENGTH] {
let mut hasher = Sha1::new(); let mut hasher = Sha1::new();
let (a, b) = (p1_hash, p2_hash); let (a, b) = (p1_hash, p2_hash);
if a > b { if a > b {
hasher.input(b); hasher.update(b);
hasher.input(a); hasher.update(a);
} else { } else {
hasher.input(a); hasher.update(a);
hasher.input(b); hasher.update(b);
} }
hasher.input(data); hasher.update(data);
let mut hash = vec![0; NODE_BYTES_LENGTH]; *hasher.finalize().as_ref()
hasher.result(&mut hash);
hash
} }
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
use super::*; use super::*;
use super::super::index::IndexEntryBuilder; use super::super::index::IndexEntryBuilder;