This commit is contained in:
Christoph J. Scherr 2023-05-10 15:36:50 +02:00
parent 29939433dc
commit 6f16487641
Signed by: PlexSheep
GPG Key ID: 25B4ACF7D88186CC
1 changed files with 40 additions and 6 deletions

View File

@ -8,16 +8,50 @@
/// License: MIT
/// Source: <https://git.cscherr.de/PlexSheep/plexcryptool/>
const SBOX: [u8; 0x10] = [0x4, 3, 9, 0xa, 0xb, 2, 0xe, 1, 0xd, 0xc, 8, 6, 7, 5, 0, 0xf];
fn swap_bits(n: u8, p1: u8, p2: u8) -> u8 {
let bit1 = (n >> p1) & 1;
let bit2 = (n >> p2) & 1;
let mut x = (bit1 ^ bit2);
x = (x << p1) | (x << p2);
n ^ x
}
pub fn inner(input: u16, key: u16) -> u16 {
let blocks = [
input & 0xf000,
input & 0x0f00,
input & 0x00f0,
input & 0x000f,
// cut into u8 blocks
let mut blocks: [u8; 4] = [
((input & 0xf000) >> 12).to_be_bytes()[1],
((input & 0x0f00) >> 08).to_be_bytes()[1],
((input & 0x000f) >> 00).to_be_bytes()[1],
((input & 0x00f0) >> 04).to_be_bytes()[1],
];
dbg!(blocks);
dbg!(&blocks);
// each block must not be more than 0xf
for block in blocks {
if block > 0xf {
panic!("Block is more than 0xf: {block}");
}
}
// inner blocks into sbox
blocks[1] = SBOX[blocks[1] as usize];
blocks[2] = SBOX[blocks[2] as usize];
dbg!(&blocks);
// swap position and endianess for outer blocks
let tmp = blocks[0];
blocks[0] = u8::swap_bytes(blocks[3]);
blocks[3] = u8::swap_bytes(tmp);
dbg!(&blocks);
println!("{:04b} {:04b} {:04b} {:04b}", blocks[0], blocks[1], blocks[2], blocks[3]);
println!("{:x}{:x}{:x}{:x}", blocks[0], blocks[1], blocks[2], blocks[3]);
panic!("Not implemented");
}