38 lines
1.2 KiB
Rust
38 lines
1.2 KiB
Rust
use crate::{Block, BlockSizeUser, Sha1Core};
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use digest::generic_array::typenum::Unsigned;
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cfg_if::cfg_if! {
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if #[cfg(feature = "force-soft")] {
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mod soft;
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use soft::compress as compress_inner;
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} else if #[cfg(all(feature = "asm", target_arch = "aarch64"))] {
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mod soft;
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mod aarch64;
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use aarch64::compress as compress_inner;
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} else if #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] {
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#[cfg(not(feature = "asm"))]
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mod soft;
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#[cfg(feature = "asm")]
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mod soft {
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pub use sha1_asm::compress;
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}
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mod x86;
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use x86::compress as compress_inner;
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} else {
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mod soft;
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use soft::compress as compress_inner;
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}
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}
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const BLOCK_SIZE: usize = <Sha1Core as BlockSizeUser>::BlockSize::USIZE;
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/// SHA-1 compression function
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#[cfg_attr(docsrs, doc(cfg(feature = "compress")))]
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pub fn compress(state: &mut [u32; 5], blocks: &[Block<Sha1Core>]) {
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// SAFETY: GenericArray<u8, U64> and [u8; 64] have
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// exactly the same memory layout
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#[allow(unsafe_code)]
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let blocks: &[[u8; BLOCK_SIZE]] =
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unsafe { &*(blocks as *const _ as *const [[u8; BLOCK_SIZE]]) };
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compress_inner(state, blocks);
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}
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