Maya Herrscher
10 months ago
commit
f4b03eb5b1
4 changed files with 386 additions and 0 deletions
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/target |
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@ -0,0 +1,8 @@ |
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[package] |
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name = "idea" |
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version = "0.2.0" |
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edition = "2021" |
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[dependencies] |
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clap = { version = "4.0", features = ["derive"] } |
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clap-num = { version = "1.1" } |
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@ -0,0 +1,115 @@ |
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// Angefangen: 13:30
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// bis: 16:20
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//
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use clap::Parser; |
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use clap_num::maybe_hex; |
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#[derive(Parser)] |
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struct Cli { |
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// The message to be encrypted
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#[arg(short = 'm', long = "message", value_parser=maybe_hex::<u64>, default_value_t = 0x42)] |
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message: u64, |
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// the key used for encryption/decryption
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#[arg(short = 'k', long = "key", value_parser=maybe_hex::<u128>, default_value_t = 123456789012345678901234567890)] |
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key: u128, |
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} |
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struct Vr { |
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v1: u16, |
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v2: u16, |
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v3: u16, |
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v4: u16, |
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} |
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impl Vr { |
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fn split(v: u64) -> Self { |
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let v4 = (v & 0xFFFF) as u16; |
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let v3 = ((v >> 16) & 0xFFFF) as u16; |
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let v2 = ((v >> 32) & 0xFFFF) as u16; |
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let v1 = ((v >> 48) & 0xFFFF) as u16; |
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Self{ v1: v1, v2: v2, v3: v3, v4: v4 } |
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} |
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fn expand(&self) -> u64 { |
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(self.v1 as u64 * 2_u64.pow(48)) + (self.v2 as u64 * 2_u64.pow(32)) + (self.v3 as u64 * 2_u64.pow(16)) + self.v4 as u64 |
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} |
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} |
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struct Keys { |
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z1: u16, z2: u16, z3: u16, z4: u16, z5: u16, z6: u16, |
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} |
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fn derive_keys(mut k: u128) -> Vec<Keys> { |
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let mut keys: Vec<Keys> = Vec::new(); |
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let mut subkeys = Vec::new(); |
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while subkeys.len() < 52 { |
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subkeys.push((k & 0xFFFF) as u16); |
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subkeys.push(((k >> 16) & 0xFFFF) as u16); |
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subkeys.push(((k >> 32) & 0xFFFF) as u16); |
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subkeys.push(((k >> 48) & 0xFFFF) as u16); |
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subkeys.push(((k >> 64) & 0xFFFF) as u16); |
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subkeys.push(((k >> 80) & 0xFFFF) as u16); |
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subkeys.push(((k >> 96) & 0xFFFF) as u16); |
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subkeys.push(((k >> 112) & 0xFFFF) as u16); |
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k = k.rotate_left(25);
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println!("key after shift {k}"); |
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} |
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let mut i = 0; |
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while keys.len() < 8 { |
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keys.push( |
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Keys{ z1: subkeys[0+i], z2: subkeys[1+i], z3: subkeys[2+i], z4: subkeys[3+i], z5: subkeys[4+i], z6: subkeys[5+i] }
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); |
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i = i+1; |
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} |
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keys.push( |
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Keys{ z1: subkeys[0+i], z2: subkeys[1+i], z3: subkeys[2+i], z4: subkeys[3+i], z5: 0, z6: 0 }
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); |
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keys |
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} |
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fn add(a: u16, b: u16) -> u16 { |
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let (a, b, m) = (a as u32, b as u32, 0x10000 as u32); |
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((a * b) % m) as u16 |
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} |
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fn mul(a: u16, b: u16) -> u16 { |
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let (a, b, m) = (a as u32, b as u32, 0x10001 as u32); |
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if a == 0 { |
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let a = 0x10000; |
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((a * b) % m) as u16 |
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} |
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else if b == 0 { |
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let b = 0x10000; |
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((a * b) % m) as u16 |
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} |
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else{ |
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((a * b) % m) as u16 |
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} |
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} |
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fn idea_round() -> Vr { |
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Vr::split(80)
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} |
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fn encrypt(k: u128, m: u64) -> u64 { |
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let xr = Vr::split(m); |
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assert_eq!(m, xr.expand()); |
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let round_keys = derive_keys(k); |
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mul(xr.v1, 0).into() |
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} |
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fn main() { |
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println!("Welcome to your IDEA encryption tool!"); |
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let args = Cli::parse(); |
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let key: u128 = args.key; |
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let message: u64 = args.message; |
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println!("message: {:?}, key: {:?}", message, key); |
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let cipher: u64 = encrypt(key, message); |
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println!("ciphertext: {:?}", cipher); |
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} |
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