primitives/algebra/field/binary/
gf2_128.rs

1use aes::Block;
2
3use crate::algebra::field::binary::{gf2_ext::*, Gf2};
4
5define_gf2_extension!(Gf2_128, IdGf2_128, 2, [1, 2, 7]);
6
7impl Gf2_128 {
8    pub fn to_le_block(&self) -> Block {
9        self.into_le_block()
10    }
11
12    pub fn into_le_block(self) -> Block {
13        #[cfg(target_endian = "little")]
14        unsafe {
15            std::mem::transmute(self)
16        }
17        #[cfg(target_endian = "big")]
18        {
19            let block = self.to_le_bytes();
20            Block::from_exact_iter(block).unwrap()
21        }
22    }
23
24    pub fn as_ne_block_mut(&mut self) -> &mut Block {
25        unsafe { std::mem::transmute(self) }
26    }
27
28    pub fn from_le_block(block: Block) -> Self {
29        #[cfg(target_endian = "little")]
30        unsafe {
31            std::mem::transmute(block)
32        }
33        #[cfg(target_endian = "big")]
34        {
35            let block = block.to_le_bytes();
36            Gf2_128::from_le_bytes(&block).unwrap()
37        }
38    }
39
40    /// Returns the first bit (least significant bit) of the element.
41    #[inline(always)]
42    pub fn first_bit(&self) -> Gf2 {
43        Gf2((self.data[0] & 1) as u8)
44    }
45}
46
47impl From<Gf2_128> for u128 {
48    fn from(value: Gf2_128) -> Self {
49        #[cfg(target_endian = "little")]
50        unsafe {
51            std::mem::transmute(value)
52        }
53        #[cfg(target_endian = "big")]
54        {
55            let bytes = value.to_le_bytes();
56            u128::from_le_bytes(bytes)
57        }
58    }
59}
primitives/algebra/field/binary/gf2_128.rs

primitives/algebra/field/binary/
gf2_128.rs
