1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
use crate::arch::*;
use cipher::{
consts::{U16, U32, U8},
generic_array::GenericArray,
BlockCipher, NewBlockCipher,
};
use crate::utils::{Block128, Block128x8};
mod expand;
#[cfg(test)]
mod test_expand;
#[derive(Copy, Clone)]
pub struct Aes256 {
encrypt_keys: [__m128i; 15],
decrypt_keys: [__m128i; 15],
}
impl Aes256 {
#[inline(always)]
pub(crate) fn encrypt8(&self, mut blocks: [__m128i; 8]) -> [__m128i; 8] {
#[inline]
#[target_feature(enable = "aes")]
unsafe fn aesni256_encrypt8(keys: &[__m128i; 15], blocks: &mut [__m128i; 8]) {
xor8!(blocks, keys[0]);
aesenc8!(blocks, keys[1]);
aesenc8!(blocks, keys[2]);
aesenc8!(blocks, keys[3]);
aesenc8!(blocks, keys[4]);
aesenc8!(blocks, keys[5]);
aesenc8!(blocks, keys[6]);
aesenc8!(blocks, keys[7]);
aesenc8!(blocks, keys[8]);
aesenc8!(blocks, keys[9]);
aesenc8!(blocks, keys[10]);
aesenc8!(blocks, keys[11]);
aesenc8!(blocks, keys[12]);
aesenc8!(blocks, keys[13]);
aesenclast8!(blocks, keys[14]);
}
unsafe { aesni256_encrypt8(&self.encrypt_keys, &mut blocks) };
blocks
}
#[inline(always)]
pub(crate) fn encrypt(&self, block: __m128i) -> __m128i {
#[inline]
#[target_feature(enable = "aes")]
unsafe fn aesni256_encrypt1(keys: &[__m128i; 15], mut block: __m128i) -> __m128i {
block = _mm_xor_si128(block, keys[0]);
block = _mm_aesenc_si128(block, keys[1]);
block = _mm_aesenc_si128(block, keys[2]);
block = _mm_aesenc_si128(block, keys[3]);
block = _mm_aesenc_si128(block, keys[4]);
block = _mm_aesenc_si128(block, keys[5]);
block = _mm_aesenc_si128(block, keys[6]);
block = _mm_aesenc_si128(block, keys[7]);
block = _mm_aesenc_si128(block, keys[8]);
block = _mm_aesenc_si128(block, keys[9]);
block = _mm_aesenc_si128(block, keys[10]);
block = _mm_aesenc_si128(block, keys[11]);
block = _mm_aesenc_si128(block, keys[12]);
block = _mm_aesenc_si128(block, keys[13]);
_mm_aesenclast_si128(block, keys[14])
}
unsafe { aesni256_encrypt1(&self.encrypt_keys, block) }
}
}
impl NewBlockCipher for Aes256 {
type KeySize = U32;
#[inline]
fn new(key: &GenericArray<u8, U32>) -> Self {
let key = unsafe { &*(key as *const _ as *const [u8; 32]) };
let (encrypt_keys, decrypt_keys) = expand::expand(key);
Self {
encrypt_keys,
decrypt_keys,
}
}
}
impl BlockCipher for Aes256 {
type BlockSize = U16;
type ParBlocks = U8;
#[inline]
fn encrypt_block(&self, block: &mut Block128) {
#[allow(clippy::cast_ptr_alignment)]
unsafe {
let b = _mm_loadu_si128(block.as_ptr() as *const __m128i);
let b = self.encrypt(b);
_mm_storeu_si128(block.as_mut_ptr() as *mut __m128i, b);
}
}
#[inline]
fn decrypt_block(&self, block: &mut Block128) {
#[inline]
#[target_feature(enable = "aes")]
unsafe fn aes256_decrypt1(block: &mut Block128, keys: &[__m128i; 15]) {
#[allow(clippy::cast_ptr_alignment)]
let mut b = _mm_loadu_si128(block.as_ptr() as *const __m128i);
b = _mm_xor_si128(b, keys[14]);
b = _mm_aesdec_si128(b, keys[13]);
b = _mm_aesdec_si128(b, keys[12]);
b = _mm_aesdec_si128(b, keys[11]);
b = _mm_aesdec_si128(b, keys[10]);
b = _mm_aesdec_si128(b, keys[9]);
b = _mm_aesdec_si128(b, keys[8]);
b = _mm_aesdec_si128(b, keys[7]);
b = _mm_aesdec_si128(b, keys[6]);
b = _mm_aesdec_si128(b, keys[5]);
b = _mm_aesdec_si128(b, keys[4]);
b = _mm_aesdec_si128(b, keys[3]);
b = _mm_aesdec_si128(b, keys[2]);
b = _mm_aesdec_si128(b, keys[1]);
b = _mm_aesdeclast_si128(b, keys[0]);
_mm_storeu_si128(block.as_mut_ptr() as *mut __m128i, b);
}
unsafe { aes256_decrypt1(block, &self.decrypt_keys) }
}
#[inline]
fn encrypt_blocks(&self, blocks: &mut Block128x8) {
unsafe {
let b = self.encrypt8(load8!(blocks));
store8!(blocks, b);
}
}
#[inline]
fn decrypt_blocks(&self, blocks: &mut Block128x8) {
#[inline]
#[target_feature(enable = "aes")]
unsafe fn aes256_decrypt8(blocks: &mut Block128x8, keys: &[__m128i; 15]) {
let mut b = load8!(blocks);
xor8!(b, keys[14]);
aesdec8!(b, keys[13]);
aesdec8!(b, keys[12]);
aesdec8!(b, keys[11]);
aesdec8!(b, keys[10]);
aesdec8!(b, keys[9]);
aesdec8!(b, keys[8]);
aesdec8!(b, keys[7]);
aesdec8!(b, keys[6]);
aesdec8!(b, keys[5]);
aesdec8!(b, keys[4]);
aesdec8!(b, keys[3]);
aesdec8!(b, keys[2]);
aesdec8!(b, keys[1]);
aesdeclast8!(b, keys[0]);
store8!(blocks, b);
}
unsafe { aes256_decrypt8(blocks, &self.decrypt_keys) }
}
}
opaque_debug::implement!(Aes256);