96 lines
2.2 KiB
Rust
96 lines
2.2 KiB
Rust
// SPDX-License-Identifier: CC0-1.0
|
|
|
|
//! RIPEMD160 implementation.
|
|
|
|
#[cfg(bench)]
|
|
mod benches;
|
|
mod crypto;
|
|
#[cfg(bench)]
|
|
mod tests;
|
|
|
|
use core::cmp;
|
|
|
|
use crate::{incomplete_block_len, HashEngine as _};
|
|
|
|
crate::internal_macros::general_hash_type! {
|
|
160,
|
|
false,
|
|
"Output of the RIPEMD160 hash function."
|
|
}
|
|
|
|
#[cfg(not(hashes_fuzz))]
|
|
fn from_engine(mut e: HashEngine) -> Hash {
|
|
// pad buffer with a single 1-bit then all 0s, until there are exactly 8 bytes remaining
|
|
let n_bytes_hashed = e.bytes_hashed;
|
|
|
|
let zeroes = [0; BLOCK_SIZE - 8];
|
|
e.input(&[0x80]);
|
|
if crate::incomplete_block_len(&e) > zeroes.len() {
|
|
e.input(&zeroes);
|
|
}
|
|
let pad_length = zeroes.len() - incomplete_block_len(&e);
|
|
e.input(&zeroes[..pad_length]);
|
|
debug_assert_eq!(incomplete_block_len(&e), zeroes.len());
|
|
|
|
e.input(&(8 * n_bytes_hashed).to_le_bytes());
|
|
debug_assert_eq!(incomplete_block_len(&e), 0);
|
|
|
|
Hash(e.midstate())
|
|
}
|
|
|
|
#[cfg(hashes_fuzz)]
|
|
fn from_engine(e: HashEngine) -> Hash {
|
|
let mut res = e.midstate();
|
|
res[0] ^= (e.bytes_hashed & 0xff) as u8;
|
|
Hash(res)
|
|
}
|
|
|
|
const BLOCK_SIZE: usize = 64;
|
|
|
|
/// Engine to compute RIPEMD160 hash function.
|
|
#[derive(Debug, Clone)]
|
|
pub struct HashEngine {
|
|
buffer: [u8; BLOCK_SIZE],
|
|
h: [u32; 5],
|
|
bytes_hashed: u64,
|
|
}
|
|
|
|
impl HashEngine {
|
|
/// Constructs a new SHA256 hash engine.
|
|
pub const fn new() -> Self {
|
|
Self {
|
|
h: [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0],
|
|
bytes_hashed: 0,
|
|
buffer: [0; BLOCK_SIZE],
|
|
}
|
|
}
|
|
|
|
#[cfg(not(hashes_fuzz))]
|
|
fn midstate(&self) -> [u8; 20] {
|
|
let mut ret = [0; 20];
|
|
for (val, ret_bytes) in self.h.iter().zip(ret.chunks_exact_mut(4)) {
|
|
ret_bytes.copy_from_slice(&(*val).to_le_bytes());
|
|
}
|
|
ret
|
|
}
|
|
|
|
#[cfg(hashes_fuzz)]
|
|
fn midstate(&self) -> [u8; 20] {
|
|
let mut ret = [0; 20];
|
|
ret.copy_from_slice(&self.buffer[..20]);
|
|
ret
|
|
}
|
|
}
|
|
|
|
impl Default for HashEngine {
|
|
fn default() -> Self { Self::new() }
|
|
}
|
|
|
|
impl crate::HashEngine for HashEngine {
|
|
const BLOCK_SIZE: usize = 64;
|
|
|
|
fn n_bytes_hashed(&self) -> u64 { self.bytes_hashed }
|
|
|
|
crate::internal_macros::engine_input_impl!();
|
|
}
|