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#![cfg_attr(not(feature = "std"), no_std)]
extern crate crypto_simd;
pub extern crate digest;
#[macro_use]
extern crate hex_literal;
#[cfg(all(feature = "std", feature = "simd"))]
#[macro_use]
extern crate lazy_static;
#[cfg(feature = "packed_simd")]
extern crate packed_simd_crate;
#[cfg(not(any(feature = "simd", feature = "packed_simd")))]
extern crate ppv_null;
#[cfg(all(feature = "simd", not(feature = "packed_simd")))]
extern crate simd;
mod compressor;
mod consts;
pub use digest::Digest;
use crate::compressor::Compressor;
use block_buffer::byteorder::{BigEndian, ByteOrder};
use block_buffer::generic_array::GenericArray as BBGenericArray;
use block_buffer::BlockBuffer;
use core::fmt::{Debug, Formatter, Result};
use digest::generic_array::typenum::{Unsigned, U28, U32, U48, U64};
use digest::generic_array::GenericArray as DGenericArray;
macro_rules! define_hasher {
($name:ident, $init:path, $OutputBytes:ident) => {
#[derive(Clone)]
pub struct $name {
state: Compressor,
buffer: BlockBuffer<U64>,
datalen: usize,
}
impl Debug for $name {
fn fmt(&self, f: &mut Formatter) -> Result {
f.debug_struct("Jh")
.field("state", &"(state)")
.field("buffer", &"(BlockBuffer<U64>)")
.field("datalen", &self.datalen)
.finish()
}
}
impl Default for $name {
fn default() -> Self {
Self {
state: Compressor::new($init),
buffer: BlockBuffer::default(),
datalen: 0,
}
}
}
impl digest::BlockInput for $name {
type BlockSize = U64;
}
impl digest::Input for $name {
fn input<T: AsRef<[u8]>>(&mut self, data: T) {
let data = data.as_ref();
self.datalen += data.len();
let state = &mut self.state;
self.buffer.input(data, |b| state.input(b))
}
}
impl digest::FixedOutput for $name {
type OutputSize = $OutputBytes;
fn fixed_result(mut self) -> DGenericArray<u8, $OutputBytes> {
let state = &mut self.state;
let buffer = &mut self.buffer;
let len = self.datalen as u64 * 8;
if buffer.position() == 0 {
buffer.len64_padding::<BigEndian, _>(len, |b| state.input(b));
} else {
use block_buffer::block_padding::Iso7816;
state.input(buffer.pad_with::<Iso7816>().unwrap());
let mut last = BBGenericArray::default();
BigEndian::write_u64(&mut last[56..], len);
state.input(&last);
}
let finalized = self.state.finalize();
DGenericArray::clone_from_slice(&finalized[(128 - $OutputBytes::to_usize())..])
}
}
impl digest::Reset for $name {
fn reset(&mut self) {
*self = Self::default();
}
}
};
}
define_hasher!(Jh224, consts::JH224_H0, U28);
define_hasher!(Jh256, consts::JH256_H0, U32);
define_hasher!(Jh384, consts::JH384_H0, U48);
define_hasher!(Jh512, consts::JH512_H0, U64);