1// Copyright 2018-2024 Brian Smith.
2//
3// Permission to use, copy, modify, and/or distribute this software for any
4// purpose with or without fee is hereby granted, provided that the above
5// copyright notice and this permission notice appear in all copies.
6//
7// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
8// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
10// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
14
15#![cfg(target_arch = "x86_64")]
16
17use super::{HTable, KeyValue, UpdateBlock, UpdateBlocks, Xi, BLOCK_LEN};
18use crate::{cpu, polyfill::slice::AsChunks};
19
20pub(in super::super) type RequiredCpuFeatures =
21 (cpu::intel::ClMul, cpu::intel::Avx, cpu::intel::Movbe);
22
23#[derive(Clone)]
24pub struct Key {
25 h_table: HTable,
26}
27
28impl Key {
29 pub(in super::super) fn new(value: KeyValue, _cpu: RequiredCpuFeatures) -> Self {
30 Self {
31 h_table: unsafe { htable_new!(gcm_init_avx, value) },
32 }
33 }
34
35 pub(super) fn inner(&self) -> &HTable {
36 &self.h_table
37 }
38}
39
40impl UpdateBlock for Key {
41 fn update_block(&self, xi: &mut Xi, a: [u8; BLOCK_LEN]) {
42 self.update_blocks(xi, (&a).into())
43 }
44}
45
46impl UpdateBlocks for Key {
47 fn update_blocks(&self, xi: &mut Xi, input: AsChunks<u8, BLOCK_LEN>) {
48 unsafe { ghash!(gcm_ghash_avx, xi, self.inner(), input) }
49 }
50}
51