704 lines
18 KiB
Rust
704 lines
18 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! General hash types, a fixed-size raw-data type used as the output of hash functions.
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use standard::*;
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use math::log2;
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use error::UtilError;
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use rand::Rng;
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use rand::os::OsRng;
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use bytes::{BytesConvertable,Populatable};
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use from_json::*;
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use bigint::uint::{Uint, U256};
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use rustc_serialize::hex::ToHex;
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use serde;
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/// Trait for a fixed-size byte array to be used as the output of hash functions.
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///
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/// Note: types implementing `FixedHash` must be also `BytesConvertable`.
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pub trait FixedHash: Sized + BytesConvertable + Populatable + FromStr + Default {
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/// Create a new, zero-initialised, instance.
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fn new() -> Self;
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/// Synonym for `new()`. Prefer to new as it's more readable.
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fn zero() -> Self;
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/// Create a new, cryptographically random, instance.
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fn random() -> Self;
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/// Assign self have a cryptographically random value.
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fn randomize(&mut self);
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/// Get the size of this object in bytes.
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fn len() -> usize;
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/// Convert a slice of bytes of length `len()` to an instance of this type.
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fn from_slice(src: &[u8]) -> Self;
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/// Assign self to be of the same value as a slice of bytes of length `len()`.
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fn clone_from_slice(&mut self, src: &[u8]) -> usize;
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/// Copy the data of this object into some mutable slice of length `len()`.
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fn copy_to(&self, dest: &mut [u8]);
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/// When interpreting self as a bloom output, augment (bit-wise OR) with the a bloomed version of `b`.
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fn shift_bloomed<'a, T>(&'a mut self, b: &T) -> &'a mut Self where T: FixedHash;
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/// Same as `shift_bloomed` except that `self` is consumed and a new value returned.
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fn with_bloomed<T>(mut self, b: &T) -> Self where T: FixedHash { self.shift_bloomed(b); self }
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/// Bloom the current value using the bloom parameter `m`.
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fn bloom_part<T>(&self, m: usize) -> T where T: FixedHash;
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/// Check to see whether this hash, interpreted as a bloom, contains the value `b` when bloomed.
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fn contains_bloomed<T>(&self, b: &T) -> bool where T: FixedHash;
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/// Returns `true` if all bits set in `b` are also set in `self`.
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fn contains<'a>(&'a self, b: &'a Self) -> bool;
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/// Returns `true` if no bits are set.
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fn is_zero(&self) -> bool;
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/// Returns the lowest 8 bytes interpreted as a BigEndian integer.
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fn low_u64(&self) -> u64;
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}
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/// Return `s` without the `0x` at the beginning of it, if any.
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pub fn clean_0x(s: &str) -> &str {
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if s.len() >= 2 && &s[0..2] == "0x" {
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&s[2..]
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} else {
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s
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}
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}
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macro_rules! impl_hash {
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($from: ident, $size: expr) => {
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#[derive(Eq)]
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#[repr(C)]
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/// Unformatted binary data of fixed length.
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pub struct $from (pub [u8; $size]);
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impl From<[u8; $size]> for $from {
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fn from(bytes: [u8; $size]) -> Self {
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$from(bytes)
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}
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}
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impl Deref for $from {
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type Target = [u8];
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#[inline]
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fn deref(&self) -> &[u8] {
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&self.0
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}
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}
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impl AsRef<[u8]> for $from {
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#[inline]
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fn as_ref(&self) -> &[u8] {
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&self.0
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}
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}
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impl DerefMut for $from {
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#[inline]
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fn deref_mut(&mut self) -> &mut [u8] {
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&mut self.0
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}
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}
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impl FixedHash for $from {
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fn new() -> $from {
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$from([0; $size])
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}
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fn zero() -> $from {
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$from([0; $size])
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}
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fn random() -> $from {
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let mut hash = $from::new();
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hash.randomize();
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hash
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}
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fn randomize(&mut self) {
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let mut rng = OsRng::new().unwrap();
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rng.fill_bytes(&mut self.0);
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}
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fn len() -> usize {
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$size
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}
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// TODO: remove once slice::clone_from_slice is stable
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#[inline]
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fn clone_from_slice(&mut self, src: &[u8]) -> usize {
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let min = ::std::cmp::min($size, src.len());
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let dst = &mut self.deref_mut()[.. min];
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let src = &src[.. min];
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for i in 0..min {
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dst[i] = src[i];
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}
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min
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}
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fn from_slice(src: &[u8]) -> Self {
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let mut r = Self::new();
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r.clone_from_slice(src);
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r
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}
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fn copy_to(&self, dest: &mut[u8]) {
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let min = ::std::cmp::min($size, dest.len());
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dest[..min].copy_from_slice(&self.0[..min]);
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}
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fn shift_bloomed<'a, T>(&'a mut self, b: &T) -> &'a mut Self where T: FixedHash {
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let bp: Self = b.bloom_part($size);
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let new_self = &bp | self;
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// impl |= instead
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// TODO: that's done now!
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self.0 = new_self.0;
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self
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}
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fn bloom_part<T>(&self, m: usize) -> T where T: FixedHash {
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// numbers of bits
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// TODO: move it to some constant
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let p = 3;
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let bloom_bits = m * 8;
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let mask = bloom_bits - 1;
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let bloom_bytes = (log2(bloom_bits) + 7) / 8;
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//println!("bb: {}", bloom_bytes);
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// must be a power of 2
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assert_eq!(m & (m - 1), 0);
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// out of range
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assert!(p * bloom_bytes <= $size);
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// return type
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let mut ret = T::new();
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// 'ptr' to out slice
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let mut ptr = 0;
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// set p number of bits,
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// p is equal 3 according to yellowpaper
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for _ in 0..p {
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let mut index = 0 as usize;
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for _ in 0..bloom_bytes {
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index = (index << 8) | self.0[ptr] as usize;
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ptr += 1;
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}
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index &= mask;
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ret.as_slice_mut()[m - 1 - index / 8] |= 1 << (index % 8);
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}
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ret
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}
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fn contains_bloomed<T>(&self, b: &T) -> bool where T: FixedHash {
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let bp: Self = b.bloom_part($size);
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self.contains(&bp)
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}
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fn contains<'a>(&'a self, b: &'a Self) -> bool {
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&(b & self) == b
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}
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fn is_zero(&self) -> bool {
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self.eq(&Self::new())
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}
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fn low_u64(&self) -> u64 {
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let mut ret = 0u64;
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for i in 0..min($size, 8) {
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ret |= (self.0[$size - 1 - i] as u64) << (i * 8);
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}
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ret
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}
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}
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impl FromStr for $from {
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type Err = UtilError;
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fn from_str(s: &str) -> Result<$from, UtilError> {
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let a = try!(s.from_hex());
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if a.len() != $size { return Err(UtilError::BadSize); }
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let mut ret = $from([0;$size]);
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for i in 0..$size {
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ret.0[i] = a[i];
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}
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Ok(ret)
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}
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}
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impl serde::Serialize for $from {
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fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
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where S: serde::Serializer {
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let mut hex = "0x".to_owned();
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hex.push_str(self.to_hex().as_ref());
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serializer.serialize_str(hex.as_ref())
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}
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}
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impl serde::Deserialize for $from {
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fn deserialize<D>(deserializer: &mut D) -> Result<$from, D::Error>
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where D: serde::Deserializer {
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struct HashVisitor;
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impl serde::de::Visitor for HashVisitor {
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type Value = $from;
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fn visit_str<E>(&mut self, value: &str) -> Result<Self::Value, E> where E: serde::Error {
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// 0x + len
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if value.len() != 2 + $size * 2 {
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return Err(serde::Error::custom("Invalid length."));
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}
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value[2..].from_hex().map(|ref v| $from::from_slice(v)).map_err(|_| serde::Error::custom("Invalid hex value."))
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}
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fn visit_string<E>(&mut self, value: String) -> Result<Self::Value, E> where E: serde::Error {
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self.visit_str(value.as_ref())
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}
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}
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deserializer.deserialize(HashVisitor)
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}
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}
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impl FromJson for $from {
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fn from_json(json: &Json) -> Self {
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match *json {
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Json::String(ref s) => {
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match s.len() % 2 {
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0 => FromStr::from_str(clean_0x(s)).unwrap(),
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_ => FromStr::from_str(&("0".to_owned() + &(clean_0x(s).to_owned()))[..]).unwrap()
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}
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},
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_ => Default::default(),
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}
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}
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}
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impl fmt::Debug for $from {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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for i in &self.0[..] {
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try!(write!(f, "{:02x}", i));
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}
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Ok(())
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}
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}
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impl fmt::Display for $from {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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for i in &self.0[0..2] {
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try!(write!(f, "{:02x}", i));
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}
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try!(write!(f, "…"));
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for i in &self.0[$size - 2..$size] {
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try!(write!(f, "{:02x}", i));
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}
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Ok(())
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}
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}
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impl Copy for $from {}
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#[cfg_attr(feature="dev", allow(expl_impl_clone_on_copy))]
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impl Clone for $from {
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fn clone(&self) -> $from {
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let mut ret = $from::new();
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ret.0.copy_from_slice(&self.0);
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ret
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}
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}
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impl PartialEq for $from {
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fn eq(&self, other: &Self) -> bool {
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for i in 0..$size {
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if self.0[i] != other.0[i] {
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return false;
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}
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}
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true
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}
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}
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impl Ord for $from {
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fn cmp(&self, other: &Self) -> Ordering {
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for i in 0..$size {
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if self.0[i] > other.0[i] {
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return Ordering::Greater;
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} else if self.0[i] < other.0[i] {
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return Ordering::Less;
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}
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}
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Ordering::Equal
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}
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}
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impl PartialOrd for $from {
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fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
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Some(self.cmp(other))
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}
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}
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impl Hash for $from {
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fn hash<H>(&self, state: &mut H) where H: Hasher {
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state.write(&self.0);
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state.finish();
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}
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}
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impl Index<usize> for $from {
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type Output = u8;
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fn index(&self, index: usize) -> &u8 {
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&self.0[index]
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}
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}
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impl IndexMut<usize> for $from {
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fn index_mut(&mut self, index: usize) -> &mut u8 {
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&mut self.0[index]
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}
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}
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impl Index<ops::Range<usize>> for $from {
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type Output = [u8];
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fn index(&self, index: ops::Range<usize>) -> &[u8] {
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&self.0[index]
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}
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}
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impl IndexMut<ops::Range<usize>> for $from {
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fn index_mut(&mut self, index: ops::Range<usize>) -> &mut [u8] {
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&mut self.0[index]
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}
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}
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impl Index<ops::RangeFull> for $from {
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type Output = [u8];
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fn index(&self, _index: ops::RangeFull) -> &[u8] {
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&self.0
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}
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}
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impl IndexMut<ops::RangeFull> for $from {
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fn index_mut(&mut self, _index: ops::RangeFull) -> &mut [u8] {
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&mut self.0
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}
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}
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/// `BitOr` on references
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impl<'a> BitOr for &'a $from {
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type Output = $from;
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fn bitor(self, rhs: Self) -> Self::Output {
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let mut ret: $from = $from::default();
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for i in 0..$size {
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ret.0[i] = self.0[i] | rhs.0[i];
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}
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ret
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}
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}
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/// Moving `BitOr`
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impl BitOr for $from {
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type Output = $from;
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fn bitor(self, rhs: Self) -> Self::Output {
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&self | &rhs
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}
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}
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/// `BitAnd` on references
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impl <'a> BitAnd for &'a $from {
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type Output = $from;
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fn bitand(self, rhs: Self) -> Self::Output {
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let mut ret: $from = $from::default();
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for i in 0..$size {
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ret.0[i] = self.0[i] & rhs.0[i];
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}
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ret
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}
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}
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/// Moving `BitAnd`
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impl BitAnd for $from {
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type Output = $from;
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fn bitand(self, rhs: Self) -> Self::Output {
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&self & &rhs
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}
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}
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/// `BitXor` on references
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impl <'a> BitXor for &'a $from {
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type Output = $from;
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fn bitxor(self, rhs: Self) -> Self::Output {
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let mut ret: $from = $from::default();
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for i in 0..$size {
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ret.0[i] = self.0[i] ^ rhs.0[i];
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}
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ret
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}
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}
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/// Moving `BitXor`
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impl BitXor for $from {
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type Output = $from;
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fn bitxor(self, rhs: Self) -> Self::Output {
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&self ^ &rhs
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}
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}
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impl $from {
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/// Get a hex representation.
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pub fn hex(&self) -> String {
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format!("{:?}", self)
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}
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/// Construct new instance equal to the bloomed value of `b`.
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pub fn from_bloomed<T>(b: &T) -> Self where T: FixedHash { b.bloom_part($size) }
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}
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impl Default for $from {
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fn default() -> Self { $from::new() }
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}
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impl From<u64> for $from {
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fn from(mut value: u64) -> $from {
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let mut ret = $from::new();
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for i in 0..8 {
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if i < $size {
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ret.0[$size - i - 1] = (value & 0xff) as u8;
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value >>= 8;
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}
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}
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ret
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}
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}
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impl<'a> From<&'a str> for $from {
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fn from(s: &'a str) -> $from {
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use std::str::FromStr;
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if s.len() % 2 == 1 {
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$from::from_str(&("0".to_owned() + &(clean_0x(s).to_owned()))[..]).unwrap_or_else(|_| $from::new())
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} else {
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$from::from_str(clean_0x(s)).unwrap_or_else(|_| $from::new())
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}
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}
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}
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}
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}
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impl From<U256> for H256 {
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fn from(value: U256) -> H256 {
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let mut ret = H256::new();
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value.to_raw_bytes(&mut ret);
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ret
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}
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}
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impl<'a> From<&'a U256> for H256 {
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fn from(value: &'a U256) -> H256 {
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let mut ret: H256 = H256::new();
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value.to_raw_bytes(&mut ret);
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ret
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}
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}
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impl From<H256> for U256 {
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fn from(value: H256) -> U256 {
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U256::from(value.bytes())
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}
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}
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impl<'a> From<&'a H256> for U256 {
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fn from(value: &'a H256) -> U256 {
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U256::from(value.bytes())
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}
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}
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impl From<H256> for Address {
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fn from(value: H256) -> Address {
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let mut ret = Address::new();
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ret.0.copy_from_slice(&value[12..32]);
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ret
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}
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}
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impl From<H256> for H64 {
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fn from(value: H256) -> H64 {
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let mut ret = H64::new();
|
|
ret.0.copy_from_slice(&value[20..28]);
|
|
ret
|
|
}
|
|
}
|
|
|
|
/*
|
|
impl<'a> From<&'a H256> for Address {
|
|
fn from(value: &'a H256) -> Address {
|
|
let mut ret = Address::new();
|
|
ret.0.copy_from_slice(&value[12..32]);
|
|
ret
|
|
}
|
|
}
|
|
}
|
|
*/
|
|
|
|
impl From<Address> for H256 {
|
|
fn from(value: Address) -> H256 {
|
|
let mut ret = H256::new();
|
|
ret.0[12..32].copy_from_slice(&value);
|
|
ret
|
|
}
|
|
}
|
|
|
|
impl<'a> From<&'a Address> for H256 {
|
|
fn from(value: &'a Address) -> H256 {
|
|
let mut ret = H256::new();
|
|
ret.0[12..32].copy_from_slice(&value);
|
|
ret
|
|
}
|
|
}
|
|
|
|
/// Convert string `s` to an `H256`. Will panic if `s` is not 64 characters long or if any of
|
|
/// those characters are not 0-9, a-z or A-Z.
|
|
pub fn h256_from_hex(s: &str) -> H256 {
|
|
use std::str::FromStr;
|
|
H256::from_str(s).unwrap()
|
|
}
|
|
|
|
/// Convert `n` to an `H256`, setting the rightmost 8 bytes.
|
|
pub fn h256_from_u64(n: u64) -> H256 {
|
|
use bigint::uint::U256;
|
|
H256::from(&U256::from(n))
|
|
}
|
|
|
|
/// Convert string `s` to an `Address`. Will panic if `s` is not 40 characters long or if any of
|
|
/// those characters are not 0-9, a-z or A-Z.
|
|
pub fn address_from_hex(s: &str) -> Address {
|
|
use std::str::FromStr;
|
|
Address::from_str(s).unwrap()
|
|
}
|
|
|
|
/// Convert `n` to an `Address`, setting the rightmost 8 bytes.
|
|
pub fn address_from_u64(n: u64) -> Address {
|
|
let h256 = h256_from_u64(n);
|
|
From::from(h256)
|
|
}
|
|
|
|
impl_hash!(H32, 4);
|
|
impl_hash!(H64, 8);
|
|
impl_hash!(H128, 16);
|
|
impl_hash!(Address, 20);
|
|
impl_hash!(H256, 32);
|
|
impl_hash!(H264, 33);
|
|
impl_hash!(H512, 64);
|
|
impl_hash!(H520, 65);
|
|
impl_hash!(H1024, 128);
|
|
impl_hash!(H2048, 256);
|
|
|
|
/// Constant address for point 0. Often used as a default.
|
|
pub static ZERO_ADDRESS: Address = Address([0x00; 20]);
|
|
/// Constant 256-bit datum for 0. Often used as a default.
|
|
pub static ZERO_H256: H256 = H256([0x00; 32]);
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use hash::*;
|
|
use bigint::uint::*;
|
|
use std::str::FromStr;
|
|
|
|
#[test]
|
|
#[cfg_attr(feature="dev", allow(eq_op))]
|
|
fn hash() {
|
|
let h = H64([0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]);
|
|
assert_eq!(H64::from_str("0123456789abcdef").unwrap(), h);
|
|
assert_eq!(format!("{}", h), "0123…cdef");
|
|
assert_eq!(format!("{:?}", h), "0123456789abcdef");
|
|
assert_eq!(h.hex(), "0123456789abcdef");
|
|
assert!(h == h);
|
|
assert!(h != H64([0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xee]));
|
|
assert!(h != H64([0; 8]));
|
|
}
|
|
|
|
#[test]
|
|
fn hash_bitor() {
|
|
let a = H64([1; 8]);
|
|
let b = H64([2; 8]);
|
|
let c = H64([3; 8]);
|
|
|
|
// borrow
|
|
assert_eq!(&a | &b, c);
|
|
|
|
// move
|
|
assert_eq!(a | b, c);
|
|
}
|
|
|
|
#[test]
|
|
fn shift_bloomed() {
|
|
use sha3::Hashable;
|
|
|
|
let bloom = H2048::from_str("00000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002020000000000000000000000000000000000000000000008000000001000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000").unwrap();
|
|
let address = Address::from_str("ef2d6d194084c2de36e0dabfce45d046b37d1106").unwrap();
|
|
let topic = H256::from_str("02c69be41d0b7e40352fc85be1cd65eb03d40ef8427a0ca4596b1ead9a00e9fc").unwrap();
|
|
|
|
let mut my_bloom = H2048::new();
|
|
assert!(!my_bloom.contains_bloomed(&address.sha3()));
|
|
assert!(!my_bloom.contains_bloomed(&topic.sha3()));
|
|
|
|
my_bloom.shift_bloomed(&address.sha3());
|
|
assert!(my_bloom.contains_bloomed(&address.sha3()));
|
|
assert!(!my_bloom.contains_bloomed(&topic.sha3()));
|
|
|
|
my_bloom.shift_bloomed(&topic.sha3());
|
|
assert_eq!(my_bloom, bloom);
|
|
assert!(my_bloom.contains_bloomed(&address.sha3()));
|
|
assert!(my_bloom.contains_bloomed(&topic.sha3()));
|
|
}
|
|
|
|
#[test]
|
|
fn from_and_to_address() {
|
|
let address = Address::from_str("ef2d6d194084c2de36e0dabfce45d046b37d1106").unwrap();
|
|
let h = H256::from(address.clone());
|
|
let a = Address::from(h);
|
|
assert_eq!(address, a);
|
|
}
|
|
|
|
#[test]
|
|
fn from_u64() {
|
|
assert_eq!(H128::from(0x1234567890abcdef), H128::from_str("00000000000000001234567890abcdef").unwrap());
|
|
assert_eq!(H64::from(0x1234567890abcdef), H64::from_str("1234567890abcdef").unwrap());
|
|
assert_eq!(H32::from(0x1234567890abcdef), H32::from_str("90abcdef").unwrap());
|
|
}
|
|
|
|
#[test]
|
|
fn from_str() {
|
|
assert_eq!(H64::from(0x1234567890abcdef), H64::from("0x1234567890abcdef"));
|
|
assert_eq!(H64::from(0x1234567890abcdef), H64::from("1234567890abcdef"));
|
|
assert_eq!(H64::from(0x234567890abcdef), H64::from("0x234567890abcdef"));
|
|
// too short.
|
|
assert_eq!(H64::from(0), H64::from("0x34567890abcdef"));
|
|
}
|
|
|
|
#[test]
|
|
fn from_and_to_u256() {
|
|
let u: U256 = 0x123456789abcdef0u64.into();
|
|
let h = H256::from(u);
|
|
assert_eq!(H256::from(u), H256::from("000000000000000000000000000000000000000000000000123456789abcdef0"));
|
|
let h_ref = H256::from(&u);
|
|
assert_eq!(h, h_ref);
|
|
let r_ref: U256 = From::from(&h);
|
|
assert_eq!(r_ref, u);
|
|
let r: U256 = From::from(h);
|
|
assert_eq!(r, u);
|
|
}
|
|
}
|