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
15use super::{Block, Counter, EncryptBlock, EncryptCtr32, Iv, KeyBytes, Overlapping, AES_KEY};
16use crate::error;
17
18#[derive(Clone)]
19pub struct Key {
20 inner: AES_KEY,
21}
22
23impl Key {
24 pub(in super::super) fn new(bytes: KeyBytes<'_>) -> Result<Self, error::Unspecified> {
25 let inner: AES_KEY = unsafe { set_encrypt_key!(aes_nohw_set_encrypt_key, bytes) }?;
26 Ok(Self { inner })
27 }
28}
29
30impl EncryptBlock for Key {
31 fn encrypt_block(&self, block: Block) -> Block {
32 unsafe { encrypt_block!(aes_nohw_encrypt, block, &self.inner) }
33 }
34
35 fn encrypt_iv_xor_block(&self, iv: Iv, block: Block) -> Block {
36 super::encrypt_iv_xor_block_using_encrypt_block(self, iv, block)
37 }
38}
39
40impl EncryptCtr32 for Key {
41 fn ctr32_encrypt_within(&self, in_out: Overlapping<'_>, ctr: &mut Counter) {
42 unsafe { ctr32_encrypt_blocks!(aes_nohw_ctr32_encrypt_blocks, in_out, &self.inner, ctr) }
43 }
44}
45