sha1: make compress consume blocks

To align with the semantics of `block_buffer::BlockBuffer::digest_blocks`
signature which works with `&[Block]` and not `&[[u8; N]]`.

Author: baloo

sha1/src/compress.rs

@@ -1,4 +1,4 @@
-use crate::BLOCK_SIZE;
+use crate::Block;
 
 cfg_if::cfg_if! {
     if #[cfg(feature = "force-soft")] {
@@ -22,6 +22,6 @@ cfg_if::cfg_if! {
 }
 
 /// SHA-1 compression function
-pub fn compress(state: &mut [u32; 5], blocks: &[[u8; BLOCK_SIZE]]) {
+pub fn compress(state: &mut [u32; 5], blocks: &[Block]) {
     compress_inner(state, blocks);
 }

sha1/src/compress/aarch64.rs

@@ -1,13 +1,15 @@
 //! SHA-1 `aarch64` backend.
 
+use crate::Block;
+
 // Per rustc target feature docs for `aarch64-unknown-linux-gnu` and
 // `aarch64-apple-darwin` platforms, the `sha2` target feature enables
 // SHA-1 as well:
 //
 // > Enable SHA1 and SHA256 support.
 cpufeatures::new!(sha1_hwcap, "sha2");
 
-pub fn compress(state: &mut [u32; 5], blocks: &[[u8; 64]]) {
+pub fn compress(state: &mut [u32; 5], blocks: &[Block]) {
     // TODO: Replace with https://github.com/rust-lang/rfcs/pull/2725
     // after stabilization
     if sha1_hwcap::get() {

sha1/src/compress/loongarch64_asm.rs

@@ -2,6 +2,8 @@
 
 use core::arch::asm;
 
+use crate::Block;
+
 const K: [u32; 4] = [0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xCA62C1D6];
 
 macro_rules! c {
@@ -102,7 +104,7 @@ macro_rules! roundtail {
     };
 }
 
-pub fn compress(state: &mut [u32; 5], blocks: &[[u8; 64]]) {
+pub fn compress(state: &mut [u32; 5], blocks: &[Block]) {
     if blocks.is_empty() {
         return;
     }

sha1/src/compress/soft.rs

@@ -1,5 +1,5 @@
 #![allow(clippy::many_single_char_names)]
-use super::BLOCK_SIZE;
+use crate::{Block, BLOCK_SIZE};
 
 const K: [u32; 4] = [0x5A827999, 0x6ED9EBA1, 0x8F1BBCDC, 0xCA62C1D6];
 
@@ -244,7 +244,7 @@ fn sha1_digest_block_u32(state: &mut [u32; 5], block: &[u32; 16]) {
     state[4] = state[4].wrapping_add(e);
 }
 
-pub fn compress(state: &mut [u32; 5], blocks: &[[u8; BLOCK_SIZE]]) {
+pub fn compress(state: &mut [u32; 5], blocks: &[Block]) {
     let mut block_u32 = [0u32; BLOCK_SIZE / 4];
     // since LLVM can't properly use aliasing yet it will make
     // unnecessary state stores without this copy

sha1/src/compress/x86.rs

@@ -7,6 +7,8 @@ use core::arch::x86::*;
 #[cfg(target_arch = "x86_64")]
 use core::arch::x86_64::*;
 
+use crate::Block;
+
 macro_rules! rounds4 {
     ($h0:ident, $h1:ident, $wk:expr, $i:expr) => {
         _mm_sha1rnds4_epu32($h0, _mm_sha1nexte_epu32($h1, $wk), $i)
@@ -31,7 +33,7 @@ macro_rules! schedule_rounds4 {
 }
 
 #[target_feature(enable = "sha,sse2,ssse3,sse4.1")]
-unsafe fn digest_blocks(state: &mut [u32; 5], blocks: &[[u8; 64]]) {
+unsafe fn digest_blocks(state: &mut [u32; 5], blocks: &[Block]) {
     #[allow(non_snake_case)]
     let MASK: __m128i = _mm_set_epi64x(0x0001_0203_0405_0607, 0x0809_0A0B_0C0D_0E0F);
 
@@ -91,7 +93,7 @@ unsafe fn digest_blocks(state: &mut [u32; 5], blocks: &[[u8; 64]]) {
 
 cpufeatures::new!(shani_cpuid, "sha", "sse2", "ssse3", "sse4.1");
 
-pub fn compress(state: &mut [u32; 5], blocks: &[[u8; 64]]) {
+pub fn compress(state: &mut [u32; 5], blocks: &[Block]) {
     // TODO: Replace with https://github.com/rust-lang/rfcs/pull/2725
     // after stabilization
     if shani_cpuid::get() {

sha1/src/lib.rs

@@ -11,10 +11,9 @@ pub use digest::{self, Digest};
 
 use core::{convert::TryInto, fmt, slice::from_ref};
 use digest::{
-    array::Array,
     block_buffer::Eager,
     core_api::{
-        AlgorithmName, Block, BlockSizeUser, Buffer, BufferKindUser, CoreWrapper, FixedOutputCore,
+        AlgorithmName, BlockSizeUser, Buffer, BufferKindUser, CoreWrapper, FixedOutputCore,
         OutputSizeUser, Reset, UpdateCore,
     },
     crypto_common::hazmat::{DeserializeStateError, SerializableState, SerializedState},
@@ -34,6 +33,9 @@ pub use compress::compress;
 const STATE_LEN: usize = 5;
 const BLOCK_SIZE: usize = <Sha1Core as BlockSizeUser>::BlockSize::USIZE;
 
+/// Block for SHA-1
+pub type Block = digest::block_buffer::Block<Sha1Core>;
+
 /// Core SHA-1 hasher state.
 #[derive(Clone)]
 pub struct Sha1Core {
@@ -60,9 +62,8 @@ impl OutputSizeUser for Sha1Core {
 
 impl UpdateCore for Sha1Core {
     #[inline]
-    fn update_blocks(&mut self, blocks: &[Block<Self>]) {
+    fn update_blocks(&mut self, blocks: &[Block]) {
         self.block_len += blocks.len() as u64;
-        let blocks = Array::cast_slice_to_core(blocks);
         compress(&mut self.h, blocks);
     }
 }
@@ -74,7 +75,7 @@ impl FixedOutputCore for Sha1Core {
         let bit_len = 8 * (buffer.get_pos() as u64 + bs * self.block_len);
 
         let mut h = self.h;
-        buffer.len64_padding_be(bit_len, |b| compress(&mut h, from_ref(&b.0)));
+        buffer.len64_padding_be(bit_len, |b| compress(&mut h, from_ref(b)));
         for (chunk, v) in out.chunks_exact_mut(4).zip(h.iter()) {
             chunk.copy_from_slice(&v.to_be_bytes());
         }