arnaucube/mimc-rs
1
1
Fork 0
mirror of https://github.com/arnaucube/mimc-rs.git synced 2026-02-06 19:16:45 +01:00
Code Issues Packages Projects Releases Wiki Activity

add padding in constants generation

Browse Source
This commit is contained in:
arnaucube
2019-10-11 14:46:37 +09:00
parent be153c7ac2
commit 3028cd7975
2 changed files with 10 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Cargo.toml
View File

@@ -5,6 +5,8 @@ authors = ["arnaucube <root@arnaucube.com>"]
edition = "2018" edition = "2018"
license = "GPL-3.0" license = "GPL-3.0"
description = "MIMC7 hash implementation" description = "MIMC7 hash implementation"
repository = "https://github.com/arnaucube/mimc-rs"
readme = "README.md"
[dependencies] [dependencies]
num = "0.2.0" num = "0.2.0"

9
src/lib.rs
View File

@@ -64,15 +64,22 @@ pub fn get_constants(r: &BigInt, seed: &str, n_rounds: i64) -> Vec<BigInt> {
let mut c = BigInt::from_bytes_be(Sign::Plus, &h); let mut c = BigInt::from_bytes_be(Sign::Plus, &h);
for _ in 1..n_rounds { for _ in 1..n_rounds {
let (_, c_bytes) = c.to_bytes_be();
let mut c_bytes32: [u8;32] = [0;32];
let diff = c_bytes32.len() - c_bytes.len();
c_bytes32[diff..].copy_from_slice(&c_bytes[..]);
let mut keccak = Keccak::new_keccak256(); let mut keccak = Keccak::new_keccak256();
let mut h = [0u8; 32]; let mut h = [0u8; 32];
let (_, c_bytes) = c.to_bytes_be();
keccak.update(&c_bytes[..]); keccak.update(&c_bytes[..]);
keccak.finalize(&mut h); keccak.finalize(&mut h);
c = BigInt::from_bytes_be(Sign::Plus, &h); c = BigInt::from_bytes_be(Sign::Plus, &h);
let n = modulus(&c, &r); let n = modulus(&c, &r);
cts.push(n); cts.push(n);
} }
// let l = cts.len();
// cts[l-1] = Zero::zero();
cts cts
} }