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54 lines
1.0 KiB
54 lines
1.0 KiB
use super::*;
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use crate::{
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array,
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provider::ByteProvider,
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};
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pub const SHA256_TRUNCATE: usize = 8;
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mod __static_assert
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{
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use super::*;
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const _IS_LESS_THAN_OR_EQ_SHA256_SIZE: &'static [()] = &[(); SHA256_SIZE - SHA256_TRUNCATE];
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}
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use std::fmt;
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impl fmt::Display for Sha256Truncated
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{
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
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{
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write!(f, "Sha256Truncated[->{}] (", SHA256_TRUNCATE)?;
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for byte in self.hash.iter()
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{
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write!(f, "{:02x}", *byte)?;
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}
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write!(f, ")")
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}
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}
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#[repr(C)]
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#[repr(packed)]
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#[derive(Copy,Clone,Debug,PartialEq,Eq,Hash)]
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pub struct Sha256Truncated
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{
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hash: [u8; SHA256_TRUNCATE],
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}
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impl ByteProvider for hash::Sha256Truncated
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{
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fn bytes(&self) -> &[u8]
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{
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&self.hash[..]
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}
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fn compute<T: Read + ?Sized>(input: &mut T, salt: &salt::Salt, done: &mut usize) -> Result<Self, error::Error>
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{
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let (ok, sha) = Sha256Hash::compute(input, salt)?;
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let mut hash = [0u8; SHA256_TRUNCATE];
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array::copy_slice(&mut hash, sha.bytes());
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*done = ok;
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Ok(Self{hash})
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}
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}
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