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