tea-soft 0.3.0

TEA block cipher
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

use crate::impls::Block8x4;
use byteorder::{BigEndian, ByteOrder};
use core::ops::{BitXor, Shl, Shr};

#[derive(Clone, Copy, PartialEq, Eq, Debug)]
#[allow(non_camel_case_types)]
pub struct u32x4(pub u32, pub u32, pub u32, pub u32);

pub trait WrapArithmetic<T> {
    fn wrapping_add(self, rhs: T) -> Self;
    fn wrapping_sub(self, rhs: T) -> Self;
}

impl WrapArithmetic<u32> for u32 {
    #[inline(always)]
    fn wrapping_add(self, rhs: u32) -> Self {
        u32::wrapping_add(self, rhs)
    }

    #[inline(always)]
    fn wrapping_sub(self, rhs: u32) -> Self {
        u32::wrapping_sub(self, rhs)
    }
}

impl WrapArithmetic<u32> for u32x4 {
    #[inline(always)]
    fn wrapping_add(self, rhs: u32) -> Self {
        u32x4(
            self.0.wrapping_add(rhs),
            self.1.wrapping_add(rhs),
            self.2.wrapping_add(rhs),
            self.3.wrapping_add(rhs),
        )
    }

    #[inline(always)]
    fn wrapping_sub(self, rhs: u32) -> Self {
        u32x4(
            self.0.wrapping_sub(rhs),
            self.1.wrapping_sub(rhs),
            self.2.wrapping_sub(rhs),
            self.3.wrapping_sub(rhs),
        )
    }
}

impl WrapArithmetic<u32x4> for u32x4 {
    #[inline(always)]
    fn wrapping_add(self, rhs: u32x4) -> Self {
        u32x4(
            self.0.wrapping_add(rhs.0),
            self.1.wrapping_add(rhs.1),
            self.2.wrapping_add(rhs.2),
            self.3.wrapping_add(rhs.3),
        )
    }

    #[inline(always)]
    fn wrapping_sub(self, rhs: u32x4) -> Self {
        u32x4(
            self.0.wrapping_sub(rhs.0),
            self.1.wrapping_sub(rhs.1),
            self.2.wrapping_sub(rhs.2),
            self.3.wrapping_sub(rhs.3),
        )
    }
}

impl BitXor for u32x4 {
    type Output = u32x4;

    #[inline(always)]
    fn bitxor(self, rhs: u32x4) -> u32x4 {
        u32x4(
            self.0 ^ rhs.0,
            self.1 ^ rhs.1,
            self.2 ^ rhs.2,
            self.3 ^ rhs.3,
        )
    }
}

impl Shl<usize> for u32x4 {
    type Output = u32x4;

    #[inline(always)]
    fn shl(self, rhs: usize) -> u32x4 {
        u32x4(self.0 << rhs, self.1 << rhs, self.2 << rhs, self.3 << rhs)
    }
}

impl Shr<usize> for u32x4 {
    type Output = u32x4;

    #[inline(always)]
    fn shr(self, rhs: usize) -> u32x4 {
        u32x4(self.0 >> rhs, self.1 >> rhs, self.2 >> rhs, self.3 >> rhs)
    }
}

#[inline(always)]
pub fn slice_block(blocks: &mut Block8x4) -> (u32x4, u32x4) {
    (
        u32x4(
            BigEndian::read_u32(&blocks[0][0..4]),
            BigEndian::read_u32(&blocks[1][0..4]),
            BigEndian::read_u32(&blocks[2][0..4]),
            BigEndian::read_u32(&blocks[3][0..4]),
        ),
        u32x4(
            BigEndian::read_u32(&blocks[0][4..8]),
            BigEndian::read_u32(&blocks[1][4..8]),
            BigEndian::read_u32(&blocks[2][4..8]),
            BigEndian::read_u32(&blocks[3][4..8]),
        ),
    )
}

#[inline(always)]
pub fn unslice_block(xs: u32x4, ys: u32x4, blocks: &mut Block8x4) {
    BigEndian::write_u32(&mut blocks[0][0..4], xs.0);
    BigEndian::write_u32(&mut blocks[1][0..4], xs.1);
    BigEndian::write_u32(&mut blocks[2][0..4], xs.2);
    BigEndian::write_u32(&mut blocks[3][0..4], xs.3);

    BigEndian::write_u32(&mut blocks[0][4..8], ys.0);
    BigEndian::write_u32(&mut blocks[1][4..8], ys.1);
    BigEndian::write_u32(&mut blocks[2][4..8], ys.2);
    BigEndian::write_u32(&mut blocks[3][4..8], ys.3);
}