52 lines
1.6 KiB
Rust
52 lines
1.6 KiB
Rust
// Copyright 2018-2024 Brian Smith.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#![cfg(target_arch = "x86_64")]
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use super::{HTable, KeyValue, UpdateBlock, UpdateBlocks, Xi, BLOCK_LEN};
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use crate::{cpu::intel, polyfill::slice::AsChunks};
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#[derive(Clone)]
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pub struct Key {
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h_table: HTable,
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}
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impl Key {
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#[inline(never)]
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pub(in super::super) fn new(
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value: KeyValue,
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_required_cpu_features: (intel::ClMul, intel::Avx, intel::Movbe),
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) -> Self {
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Self {
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h_table: unsafe { htable_new!(gcm_init_avx, value) },
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}
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}
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pub(super) fn inner(&self) -> &HTable {
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&self.h_table
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}
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}
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impl UpdateBlock for Key {
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fn update_block(&self, xi: &mut Xi, a: [u8; BLOCK_LEN]) {
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self.update_blocks(xi, (&a).into())
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}
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}
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impl UpdateBlocks for Key {
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fn update_blocks(&self, xi: &mut Xi, input: AsChunks<u8, BLOCK_LEN>) {
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unsafe { ghash!(gcm_ghash_avx, xi, self.inner(), input) }
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}
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}
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