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use core::str;
use sha256;
use ripemd160;
use Hash as HashTrait;
use Error;
#[derive(Copy, Clone, PartialEq, Eq, Default, PartialOrd, Ord, Hash)]
#[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
#[repr(transparent)]
pub struct Hash(
#[cfg_attr(feature = "schemars", schemars(schema_with="crate::util::json_hex_string::len_20"))]
[u8; 20]
);
hex_fmt_impl!(Debug, Hash);
hex_fmt_impl!(Display, Hash);
hex_fmt_impl!(LowerHex, Hash);
index_impl!(Hash);
serde_impl!(Hash, 20);
borrow_slice_impl!(Hash);
impl str::FromStr for Hash {
type Err = ::hex::Error;
fn from_str(s: &str) -> Result<Self, Self::Err> {
::hex::FromHex::from_hex(s)
}
}
impl HashTrait for Hash {
type Engine = sha256::HashEngine;
type Inner = [u8; 20];
fn engine() -> sha256::HashEngine {
sha256::Hash::engine()
}
fn from_engine(e: sha256::HashEngine) -> Hash {
let sha2 = sha256::Hash::from_engine(e);
let rmd = ripemd160::Hash::hash(&sha2[..]);
let mut ret = [0; 20];
ret.copy_from_slice(&rmd[..]);
Hash(ret)
}
const LEN: usize = 20;
fn from_slice(sl: &[u8]) -> Result<Hash, Error> {
if sl.len() != 20 {
Err(Error::InvalidLength(Self::LEN, sl.len()))
} else {
let mut ret = [0; 20];
ret.copy_from_slice(sl);
Ok(Hash(ret))
}
}
fn into_inner(self) -> Self::Inner {
self.0
}
fn as_inner(&self) -> &Self::Inner {
&self.0
}
fn from_inner(inner: Self::Inner) -> Self {
Hash(inner)
}
}
#[cfg(test)]
mod tests {
use hash160;
use hex::{FromHex, ToHex};
use Hash;
use HashEngine;
#[derive(Clone)]
struct Test {
input: Vec<u8>,
output: Vec<u8>,
output_str: &'static str,
}
#[test]
fn test() {
let tests = vec![
Test {
input: vec![
0x04, 0xa1, 0x49, 0xd7, 0x6c, 0x5d, 0xe2, 0x7a, 0x2d,
0xdb, 0xfa, 0xa1, 0x24, 0x6c, 0x4a, 0xdc, 0xd2, 0xb6,
0xf7, 0xaa, 0x29, 0x54, 0xc2, 0xe2, 0x53, 0x03, 0xf5,
0x51, 0x54, 0xca, 0xad, 0x91, 0x52, 0xe4, 0xf7, 0xe4,
0xb8, 0x5d, 0xf1, 0x69, 0xc1, 0x8a, 0x3c, 0x69, 0x7f,
0xbb, 0x2d, 0xc4, 0xec, 0xef, 0x94, 0xac, 0x55, 0xfe,
0x81, 0x64, 0xcc, 0xf9, 0x82, 0xa1, 0x38, 0x69, 0x1a,
0x55, 0x19,
],
output: vec![
0xda, 0x0b, 0x34, 0x52, 0xb0, 0x6f, 0xe3, 0x41,
0x62, 0x6a, 0xd0, 0x94, 0x9c, 0x18, 0x3f, 0xbd,
0xa5, 0x67, 0x68, 0x26,
],
output_str: "da0b3452b06fe341626ad0949c183fbda5676826",
},
];
for test in tests {
let hash = hash160::Hash::hash(&test.input[..]);
assert_eq!(hash, hash160::Hash::from_hex(test.output_str).expect("parse hex"));
assert_eq!(&hash[..], &test.output[..]);
assert_eq!(&hash.to_hex(), &test.output_str);
let mut engine = hash160::Hash::engine();
for ch in test.input {
engine.input(&[ch]);
}
let manual_hash = Hash::from_engine(engine);
assert_eq!(hash, manual_hash);
assert_eq!(hash.into_inner()[..].as_ref(), test.output.as_slice());
}
}
#[cfg(feature="serde")]
#[test]
fn ripemd_serde() {
use serde_test::{Configure, Token, assert_tokens};
static HASH_BYTES: [u8; 20] = [
0x13, 0x20, 0x72, 0xdf,
0x69, 0x09, 0x33, 0x83,
0x5e, 0xb8, 0xb6, 0xad,
0x0b, 0x77, 0xe7, 0xb6,
0xf1, 0x4a, 0xca, 0xd7,
];
let hash = hash160::Hash::from_slice(&HASH_BYTES).expect("right number of bytes");
assert_tokens(&hash.compact(), &[Token::BorrowedBytes(&HASH_BYTES[..])]);
assert_tokens(&hash.readable(), &[Token::Str("132072df690933835eb8b6ad0b77e7b6f14acad7")]);
}
}
#[cfg(all(test, feature="unstable"))]
mod benches {
use test::Bencher;
use hash160;
use Hash;
use HashEngine;
#[bench]
pub fn hash160_10(bh: & mut Bencher) {
let mut engine = hash160::Hash::engine();
let bytes = [1u8; 10];
bh.iter( || {
engine.input(&bytes);
});
bh.bytes = bytes.len() as u64;
}
#[bench]
pub fn hash160_1k(bh: & mut Bencher) {
let mut engine = hash160::Hash::engine();
let bytes = [1u8; 1024];
bh.iter( || {
engine.input(&bytes);
});
bh.bytes = bytes.len() as u64;
}
#[bench]
pub fn hash160_64k(bh: & mut Bencher) {
let mut engine = hash160::Hash::engine();
let bytes = [1u8; 65536];
bh.iter( || {
engine.input(&bytes);
});
bh.bytes = bytes.len() as u64;
}
}