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/// TODO: docs
#[derive(Clone)]
pub struct Sha3256([u64; 25], Vec<u8>);
mod impls {
use std::borrow::Borrow;
use std::default::Default;
use std::hash::Hasher;
use std::io::prelude::*;
use std::io;
use bswap::leu64;
use super::Sha3256;
use utils::{Reset,
Digest,
DigestExt,
ReadPadBlocksExt,
StdPad};
impl Default for Sha3256 {
/// Construct a default `Sha3256` object.
fn default() -> Sha3256 {
Sha3256([0u64; 25], Vec::new())
}
}
impl Reset for Sha3256 {
/// Reset the state
fn reset(&mut self) {
self.0 = [0u64; 25];
self.1.clear();
}
}
impl Write for Sha3256 {
/// Write to buffer
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
Write::write(&mut self.1, buf)
}
/// Digest buffer
fn flush(&mut self) -> io::Result<()> {
let ref buf = self.1;
for block in buf.pad_blocks(136, |_: usize| {
StdPad::with_prefix(0x06u8, vec![0x80u8], 136)
}) {
super::super::keccak::ops::digest_block(&mut self.0, block.borrow());
}
Ok(())
}
}
impl Read for Sha3256 {
/// Read state as big-endian
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
let state_buf = &self.0[..buf.len()/8];
leu64::encode_slice(buf, state_buf);
Ok(buf.len())
}
}
impl Hasher for Sha3256 {
/// Get the first 8 bytes of the state
fn finish(&self) -> u64 {
let mut h = self.clone();
h.flush().unwrap();
h.0[0]
}
/// Write to buffer
fn write(&mut self, buf: &[u8]) {
Write::write(self, buf).unwrap();
}
}
impl Digest for Sha3256 {}
impl DigestExt for Sha3256 {
fn default_len() -> usize {
return 32;
}
}
}
#[cfg(test)]
mod tests {
use std::default::Default;
use utils::{Digest, DigestExt};
use super::Sha3256;
//
// Helper functions
//
fn digest(buf: &[u8]) -> Sha3256 {
let mut h: Sha3256 = Default::default();
h.digest(buf);
h
}
fn digest_to_bytes(buf: &[u8]) -> Vec<u8> {
digest(buf).to_bytes()
}
fn digest_to_hex(msg: &str) -> String {
Sha3256::default().digest(msg.as_bytes()).to_hex()
}
//
// Tests for `digest_to_hex`
//
#[test]
fn test_sha3256_empty() {
assert_eq!(digest_to_hex(""),
concat!("a7ffc6f8bf1ed766",
"51c14756a061d662",
"f580ff4de43b49fa",
"82d80a4b80f8434a"));
}
//#[bench]
//pub fn bench_sha256_block(bh: & mut Bencher) {
// use super::super::keccak::ops::digest_block;
// let mut state: [u64; 25] = [0; 25];
// let bytes = [1u8; 136];
// let block = &bytes[..];
// bh.iter( || { digest_block(&mut state, block); });
// bh.bytes = 64u64;
//}
//#[bench]
//pub fn bench_sha256_block_simd(bh: & mut Bencher) {
// use super::super::keccak_simd::ops::digest_block;
// let mut state: [u64; 25] = [0; 25];
// let bytes = [1u8; 136];
// let block = &bytes[..];
// bh.iter( || { digest_block(&mut state, block); });
// bh.bytes = 64u64;
//}
//
//#[bench]
//pub fn bench_sha256_block_simd2(bh: & mut Bencher) {
// use super::super::keccak_simd::ops::digest_block;
// let mut state: [u64; 25] = [0; 25];
// let bytes = [1u8; 136];
// let block = &bytes[..];
// bh.iter( || { digest_block(&mut state, block); });
// bh.bytes = 64u64;
//}
//#[bench]
//fn bench_sha3256_10(b: & mut Bencher) {
// let buf = [0x20u8; 10];
// b.iter( || { digest(&buf[..]); });
// b.bytes = buf.len() as u64;
//}
//#[bench]
//fn bench_sha3256_1k(b: & mut Bencher) {
// let buf = [0x20u8; 1000];
// b.iter( || { digest(&buf[..]); });
// b.bytes = buf.len() as u64;
//}
//#[bench]
//fn bench_sha3256_64k(b: & mut Bencher) {
// let buf = [0x20u8; 65536];
// b.iter( || { digest(&buf[..]); });
// b.bytes = buf.len() as u64;
//}
//#[bench]
//fn bench_sha3256_to_bytes_10(b: & mut Bencher) {
// let buf = [0x20u8; 10];
// b.iter( || { digest_to_bytes(&buf[..]); });
// b.bytes = buf.len() as u64;
//}
//#[bench]
//fn bench_sha3256_to_hex_10(b: & mut Bencher) {
// let buf = [0x20u8; 10];
// let msg = ::std::str::from_utf8(&buf[..]).unwrap();
// b.iter( || { digest_to_hex(msg); });
// b.bytes = msg.len() as u64;
//}
}