144 lines
4.1 KiB
Rust
144 lines
4.1 KiB
Rust
// SPDX-License-Identifier: CC0-1.0
|
|
|
|
//! SHA256d implementation (double SHA256).
|
|
//!
|
|
|
|
use core::ops::Index;
|
|
use core::slice::SliceIndex;
|
|
use core::str;
|
|
|
|
use crate::{sha256, FromSliceError};
|
|
|
|
crate::internal_macros::hash_type! {
|
|
256,
|
|
true,
|
|
"Output of the SHA256d hash function."
|
|
}
|
|
|
|
type HashEngine = sha256::HashEngine;
|
|
|
|
fn from_engine(e: sha256::HashEngine) -> Hash {
|
|
use crate::Hash as _;
|
|
|
|
let sha2 = sha256::Hash::from_engine(e);
|
|
let sha2d = sha256::Hash::hash(&sha2[..]);
|
|
|
|
let mut ret = [0; 32];
|
|
ret.copy_from_slice(&sha2d[..]);
|
|
Hash(ret)
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
#[test]
|
|
#[cfg(feature = "alloc")]
|
|
fn test() {
|
|
use crate::{sha256, sha256d, Hash, HashEngine};
|
|
|
|
#[derive(Clone)]
|
|
struct Test {
|
|
input: &'static str,
|
|
output: Vec<u8>,
|
|
output_str: &'static str,
|
|
}
|
|
|
|
#[rustfmt::skip]
|
|
let tests = vec![
|
|
// Test vector copied out of rust-bitcoin
|
|
Test {
|
|
input: "",
|
|
output: vec![
|
|
0x5d, 0xf6, 0xe0, 0xe2, 0x76, 0x13, 0x59, 0xd3,
|
|
0x0a, 0x82, 0x75, 0x05, 0x8e, 0x29, 0x9f, 0xcc,
|
|
0x03, 0x81, 0x53, 0x45, 0x45, 0xf5, 0x5c, 0xf4,
|
|
0x3e, 0x41, 0x98, 0x3f, 0x5d, 0x4c, 0x94, 0x56,
|
|
],
|
|
output_str: "56944c5d3f98413ef45cf54545538103cc9f298e0575820ad3591376e2e0f65d",
|
|
},
|
|
];
|
|
|
|
for test in tests {
|
|
// Hash through high-level API, check hex encoding/decoding
|
|
let hash = sha256d::Hash::hash(test.input.as_bytes());
|
|
assert_eq!(hash, test.output_str.parse::<sha256d::Hash>().expect("parse hex"));
|
|
assert_eq!(&hash[..], &test.output[..]);
|
|
assert_eq!(&hash.to_string(), &test.output_str);
|
|
|
|
// Hash through engine, checking that we can input byte by byte
|
|
let mut engine = sha256d::Hash::engine();
|
|
for ch in test.input.as_bytes() {
|
|
engine.input(&[*ch]);
|
|
}
|
|
let manual_hash = sha256d::Hash::from_engine(engine);
|
|
assert_eq!(hash, manual_hash);
|
|
|
|
// Hash by computing a sha256 then `hash_again`ing it
|
|
let sha2_hash = sha256::Hash::hash(test.input.as_bytes());
|
|
let sha2d_hash = sha2_hash.hash_again();
|
|
assert_eq!(hash, sha2d_hash);
|
|
|
|
assert_eq!(hash.to_byte_array()[..].as_ref(), test.output.as_slice());
|
|
}
|
|
}
|
|
|
|
#[cfg(feature = "serde")]
|
|
#[test]
|
|
fn sha256_serde() {
|
|
use serde_test::{assert_tokens, Configure, Token};
|
|
|
|
use crate::{sha256d, Hash};
|
|
|
|
#[rustfmt::skip]
|
|
static HASH_BYTES: [u8; 32] = [
|
|
0xef, 0x53, 0x7f, 0x25, 0xc8, 0x95, 0xbf, 0xa7,
|
|
0x82, 0x52, 0x65, 0x29, 0xa9, 0xb6, 0x3d, 0x97,
|
|
0xaa, 0x63, 0x15, 0x64, 0xd5, 0xd7, 0x89, 0xc2,
|
|
0xb7, 0x65, 0x44, 0x8c, 0x86, 0x35, 0xfb, 0x6c,
|
|
];
|
|
|
|
let hash = sha256d::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
|
|
assert_tokens(&hash.compact(), &[Token::BorrowedBytes(&HASH_BYTES[..])]);
|
|
assert_tokens(
|
|
&hash.readable(),
|
|
&[Token::Str("6cfb35868c4465b7c289d7d5641563aa973db6a929655282a7bf95c8257f53ef")],
|
|
);
|
|
}
|
|
}
|
|
|
|
#[cfg(bench)]
|
|
mod benches {
|
|
use test::Bencher;
|
|
|
|
use crate::{sha256d, Hash, HashEngine};
|
|
|
|
#[bench]
|
|
pub fn sha256d_10(bh: &mut Bencher) {
|
|
let mut engine = sha256d::Hash::engine();
|
|
let bytes = [1u8; 10];
|
|
bh.iter(|| {
|
|
engine.input(&bytes);
|
|
});
|
|
bh.bytes = bytes.len() as u64;
|
|
}
|
|
|
|
#[bench]
|
|
pub fn sha256d_1k(bh: &mut Bencher) {
|
|
let mut engine = sha256d::Hash::engine();
|
|
let bytes = [1u8; 1024];
|
|
bh.iter(|| {
|
|
engine.input(&bytes);
|
|
});
|
|
bh.bytes = bytes.len() as u64;
|
|
}
|
|
|
|
#[bench]
|
|
pub fn sha256d_64k(bh: &mut Bencher) {
|
|
let mut engine = sha256d::Hash::engine();
|
|
let bytes = [1u8; 65536];
|
|
bh.iter(|| {
|
|
engine.input(&bytes);
|
|
});
|
|
bh.bytes = bytes.len() as u64;
|
|
}
|
|
}
|