feistel0 encryption and decryption confirmed working
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@ -86,7 +86,7 @@ pub fn inner(input: u16, key: u16, verbose: bool) -> u16 {
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}
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/// Boilerplate KSA, returns the same given values everytime.
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pub fn key_scheduler(key: u32) -> Vec<u16> {
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pub fn key_scheduler(_key: u32) -> Vec<u16> {
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return vec![0xdead, 0xc0ff, 0xee5a]
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}
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@ -130,37 +130,45 @@ fn test_decrypt() {
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let plaintext = 0xb00b00;
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let ciphertext = encrypt(plaintext, keys.clone(), true);
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let deciphertext = decrypt(ciphertext, keys.clone(), true);
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assert_eq!(ciphertext, deciphertext);
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assert_eq!(plaintext, deciphertext);
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}
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/// decrypt a given plaintext with a given key vec
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pub fn decrypt(ciphertext: u32, mut keys: Vec<u16>, verbose: bool) -> u32 {
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assert_eq!(keys.len(), ROUNDS as usize);
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let mut lef: u16 = ((ciphertext & 0xffff0000) >> 16).try_into().expect("boom");
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let mut rig: u16 = ((ciphertext & 0x0000ffff) >> 0).try_into().expect("boom");
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if verbose {
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println!("input:\n{:08x}\n{:04x}\n {:04x}", ciphertext, lef, rig);
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}
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// swap lef rig
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let mut lef: u16 = ((ciphertext & 0xffff0000) >> 16).try_into().expect("boom");
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let mut rig: u16 = ((ciphertext & 0x0000ffff) >> 0).try_into().expect("boom");
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let tmp = rig;
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rig = lef;
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lef = tmp;
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let mut ciphertext: u32 = 0;
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ciphertext |= (lef as u32) << 16;
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ciphertext |= rig as u32;
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if verbose {
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println!("input:\n{:08x}\n{:04x}\n {:04x}", ciphertext, lef, rig);
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}
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// reverse keys
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keys.reverse();
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// do the thing
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encrypt(ciphertext, keys, verbose);
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ciphertext = encrypt(ciphertext, keys, verbose);
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// swap lef rig back
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let mut lef: u16 = ((ciphertext & 0xffff0000) >> 16).try_into().expect("boom");
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let mut rig: u16 = ((ciphertext & 0x0000ffff) >> 0).try_into().expect("boom");
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let tmp = rig;
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rig = lef;
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lef = tmp;
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let mut plaintext: u32 = 0;
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plaintext |= (lef as u32) << 16;
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plaintext |= rig as u32;
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if verbose {
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println!("input:\n{:08x}\n{:04x}\n {:04x}", plaintext, lef, rig);
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}
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if verbose {
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println!("returning plaintext:\n{:08x}", plaintext);
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}
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12
src/main.rs
12
src/main.rs
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@ -136,9 +136,11 @@ struct Feistel0SBOXArgs {
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#[derive(Args, Clone, Debug, PartialEq, Eq)]
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struct Feistel0Args{
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#[clap(value_parser=maybe_hex::<u32>)]
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plaintext: u32,
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input: u32,
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#[clap(value_parser=maybe_hex::<u32>)]
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key: u32,
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#[arg(short, long, default_value_t = false)]
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decrypt: bool,
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}
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/*************************************************************************************************/
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@ -215,7 +217,13 @@ pub fn main() {
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}
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AlgoActions::Feistel0(alg_fe0_args) => {
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let keys = algo::feistel0::key_scheduler(alg_fe0_args.key);
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let result: u32 = algo::feistel0::encrypt(alg_fe0_args.plaintext, keys, args.verbose);
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let result: u32;
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if alg_fe0_args.decrypt {
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result = algo::feistel0::decrypt(alg_fe0_args.input, keys, args.verbose);
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}
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else {
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result = algo::feistel0::encrypt(alg_fe0_args.input, keys, args.verbose);
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}
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if args.machine {
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println!("{}", result)
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}
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