Ecosystem/serai
Ecosystem/serai
1
0
Fork 0
mirror of https://github.com/serai-dex/serai.git synced 2025-02-02 03:06:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Replace crc dependency with our own crc implementation

Browse source 
It's ~30 lines to remove 2 crates in our tree.
This commit is contained in:
Luke Parker 2023-11-03 06:43:34 -04:00
parent 4c9e3b085b
commit 5970a455d0
No known key found for this signature in database
3 changed files with 31 additions and 23 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
Cargo.lock generated
View file

@ -1313,21 +1313,6 @@ dependencies = [
"wasmtime-types",
]
[[package]]
name = "crc"
version = "3.0.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "86ec7a15cbe22e59248fc7eadb1907dab5ba09372595da4d73dd805ed4417dfe"
dependencies = [
"crc-catalog",
]
[[package]]
name = "crc-catalog"
version = "2.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9cace84e55f07e7301bae1c519df89cdad8cc3cd868413d3fdbdeca9ff3db484"
[[package]]
name = "crc32fast"
version = "1.3.2"
@ -4913,7 +4898,6 @@ version = "0.1.4-alpha"
dependencies = [
"async-trait",
"base58-monero",
"crc",
"curve25519-dalek",
"dalek-ff-group",
"digest_auth",

1
coins/monero/Cargo.toml
View file

@ -27,7 +27,6 @@ rand_chacha = { version = "0.3", default-features = false }
# Used to select decoys
rand_distr = { version = "0.4", default-features = false }
crc = { version = "3", default-features = false }
sha3 = { version = "0.10", default-features = false }
pbkdf2 = { version = "0.12", features = ["simple"], default-features = false }

37
coins/monero/src/wallet/seed/classic.rs
View file

@ -9,8 +9,6 @@ use std_shims::{
use zeroize::{Zeroize, Zeroizing};
use rand_core::{RngCore, CryptoRng};
use crc::{Crc, CRC_32_ISO_HDLC};
use curve25519_dalek::scalar::Scalar;
use crate::{random_scalar, wallet::seed::SeedError};
@ -101,11 +99,38 @@ fn checksum_index(words: &[Zeroizing<String>], lang: &WordList) -> usize {
*trimmed_words += &trim(w, lang.unique_prefix_length);
}
let crc = Crc::<u32>::new(&CRC_32_ISO_HDLC);
let mut digest = crc.digest();
digest.update(trimmed_words.as_bytes());
const fn crc32_table() -> [u32; 256] {
let poly = 0xedb88320u32;
usize::try_from(digest.finalize()).unwrap() % words.len()
let mut res = [0; 256];
let mut i = 0;
while i < 256 {
let mut entry = i;
let mut b = 0;
while b < 8 {
let trigger = entry & 1;
entry >>= 1;
if trigger == 1 {
entry ^= poly;
}
b += 1;
}
res[i as usize] = entry;
i += 1;
}
res
}
const CRC32_TABLE: [u32; 256] = crc32_table();
let trimmed_words = trimmed_words.as_bytes();
let mut checksum = u32::MAX;
for i in 0 .. trimmed_words.len() {
checksum = CRC32_TABLE[usize::from(u8::try_from(checksum % 256).unwrap() ^ trimmed_words[i])] ^
(checksum >> 8);
}
usize::try_from(!checksum).unwrap() % words.len()
}
// Convert a private key to a seed