| 1 | use crate::{Block, BlockSizeUser, Sha1Core}; |
| 2 | use digest::typenum::Unsigned; |
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| 3 | |
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| 4 | cfg_if::cfg_if! { |
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| 5 | if #[cfg(feature = "force-soft" )] { |
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| 6 | mod soft; |
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| 7 | use soft::compress as compress_inner; |
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| 8 | } else if #[cfg(all(feature = "asm" , target_arch = "aarch64" ))] { |
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| 9 | mod soft; |
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| 10 | mod aarch64; |
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| 11 | use aarch64::compress as compress_inner; |
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| 12 | } else if #[cfg(any(target_arch = "x86" , target_arch = "x86_64" ))] { |
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| 13 | #[cfg (not(feature = "asm" ))] |
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| 14 | mod soft; |
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| 15 | #[cfg (feature = "asm" )] |
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| 16 | mod soft { |
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| 17 | pub use sha1_asm::compress; |
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| 18 | } |
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| 19 | mod x86; |
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| 20 | use x86::compress as compress_inner; |
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| 21 | } else { |
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| 22 | mod soft; |
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| 23 | use soft::compress as compress_inner; |
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| 24 | } |
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| 25 | } |
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| 26 | |
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| 27 | const BLOCK_SIZE: usize = <Sha1Core as BlockSizeUser>::BlockSize::USIZE; |
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| 28 | |
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| 29 | /// SHA-1 compression function |
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| 30 | #[cfg_attr (docsrs, doc(cfg(feature = "compress" )))] |
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| 31 | pub fn compress(state: &mut [u32; 5], blocks: &[Block<Sha1Core>]) { |
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| 32 | // SAFETY: GenericArray<u8, U64> and [u8; 64] have |
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| 33 | // exactly the same memory layout |
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| 34 | let blocks: &[[u8; BLOCK_SIZE]] = |
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| 35 | unsafe { &*(blocks as *const _ as *const [[u8; BLOCK_SIZE]]) }; |
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| 36 | compress_inner(state, blocks); |
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| 37 | } |
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| 38 | |
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