58 lines
1.3 KiB
Rust
58 lines
1.3 KiB
Rust
mod lfsr;
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mod period;
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mod tea3;
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use lfsr::Lfsr;
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use period::{period_bruteforce, period_floyd, period_paper};
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use tea3::Tea3;
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fn main() {
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let mut lfsr = Lfsr::new(4, vec![0, 3], vec![0x12, 0x34, 0x56, 0x78]);
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for _ in 0..16 {
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let byte = lfsr.next();
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println!("{:02x} | state: {:?}", byte, lfsr.state());
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}
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let key = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
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let state = vec![0; 8];
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let mut cipher = Tea3::new(key.clone(), state.clone());
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cipher.init();
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println!("\nKeystream:");
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for _ in 0..10 {
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let byte = cipher.next_byte();
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println!("{:#04x}", byte);
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}
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let plaintext = b"hello world";
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let mut cipher_enc = Tea3::new(key.clone(), state.clone());
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cipher_enc.init();
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let ciphertext: Vec<u8> = plaintext
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.iter()
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.map(|&b| b ^ cipher_enc.next_byte())
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.collect();
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println!("\nPlaintext : {:?}", plaintext);
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println!("Ciphertext: {:?}", ciphertext);
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let mut cipher_dec = Tea3::new(key, state);
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cipher_dec.init();
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let decrypted: Vec<u8> = ciphertext
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.iter()
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.map(|&b| b ^ cipher_dec.next_byte())
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.collect();
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println!("Decrypted : {:?}", decrypted);
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println!(
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"\nPaper period: {}",
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// period_paper(vec![0xc2, 0xc2, 0xc2, 0xc2, 0xc2])
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period_paper(vec![0x05, 0x58, 0x6f, 0xe1, 0xa3])
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);
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}
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