dcrypt-algorithms 1.2.3

Cryptographic primitives for the dcrypt library
Documentation 
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use super::*;
use crate::error::Error;
use crate::types::SecretBytes;
use dcrypt_params::utils::symmetric::AES_BLOCK_SIZE;
use hex;

#[test]
fn test_aes128_encrypt() {
    // NIST test vector: AES-128-ECB
    // Key: 2b7e151628aed2a6abf7158809cf4f3c
    // Plaintext: 6bc1bee22e409f96e93d7e117393172a
    // Ciphertext: 3ad77bb40d7a3660a89ecaf32466ef97

    let key_vec = hex::decode("2b7e151628aed2a6abf7158809cf4f3c").unwrap();
    let mut key_array = [0u8; 16]; // AES-128 uses 16-byte keys
    key_array.copy_from_slice(&key_vec);
    let key = SecretBytes::new(key_array);

    let mut block = hex::decode("6bc1bee22e409f96e93d7e117393172a").unwrap();
    let expected = hex::decode("3ad77bb40d7a3660a89ecaf32466ef97").unwrap();

    let aes = Aes128::new(&key);
    aes.encrypt_block(&mut block).unwrap();

    assert_eq!(block, expected);
}

#[test]
fn test_aes128_decrypt() {
    // NIST test vector: AES-128-ECB
    // Key: 2b7e151628aed2a6abf7158809cf4f3c
    // Ciphertext: 3ad77bb40d7a3660a89ecaf32466ef97
    // Plaintext: 6bc1bee22e409f96e93d7e117393172a

    let key_vec = hex::decode("2b7e151628aed2a6abf7158809cf4f3c").unwrap();
    let mut key_array = [0u8; 16];
    key_array.copy_from_slice(&key_vec);
    let key = SecretBytes::new(key_array);

    let mut block = hex::decode("3ad77bb40d7a3660a89ecaf32466ef97").unwrap();
    let expected = hex::decode("6bc1bee22e409f96e93d7e117393172a").unwrap();

    let aes = Aes128::new(&key);
    aes.decrypt_block(&mut block).unwrap();

    assert_eq!(block, expected);
}

#[test]
fn test_aes192_encrypt() {
    // NIST test vector: AES-192-ECB
    // Key: 8e73b0f7da0e6452c810f32b809079e562f8ead2522c6b7b
    // Plaintext: 6bc1bee22e409f96e93d7e117393172a
    // Ciphertext: bd334f1d6e45f25ff712a214571fa5cc

    let key_vec = hex::decode("8e73b0f7da0e6452c810f32b809079e562f8ead2522c6b7b").unwrap();
    let mut key_array = [0u8; 24]; // AES-192 uses 24-byte keys
    key_array.copy_from_slice(&key_vec);
    let key = SecretBytes::new(key_array);

    let mut block = hex::decode("6bc1bee22e409f96e93d7e117393172a").unwrap();
    let expected = hex::decode("bd334f1d6e45f25ff712a214571fa5cc").unwrap();

    let aes = Aes192::new(&key);
    aes.encrypt_block(&mut block).unwrap();

    assert_eq!(block, expected);
}

#[test]
fn test_aes192_decrypt() {
    // NIST test vector: AES-192-ECB
    // Key: 8e73b0f7da0e6452c810f32b809079e562f8ead2522c6b7b
    // Ciphertext: bd334f1d6e45f25ff712a214571fa5cc
    // Plaintext: 6bc1bee22e409f96e93d7e117393172a

    let key_vec = hex::decode("8e73b0f7da0e6452c810f32b809079e562f8ead2522c6b7b").unwrap();
    let mut key_array = [0u8; 24];
    key_array.copy_from_slice(&key_vec);
    let key = SecretBytes::new(key_array);

    let mut block = hex::decode("bd334f1d6e45f25ff712a214571fa5cc").unwrap();
    let expected = hex::decode("6bc1bee22e409f96e93d7e117393172a").unwrap();

    let aes = Aes192::new(&key);
    aes.decrypt_block(&mut block).unwrap();

    assert_eq!(block, expected);
}

#[test]
fn test_aes256_encrypt() {
    // NIST test vector: AES-256-ECB
    // Key: 603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4
    // Plaintext: 6bc1bee22e409f96e93d7e117393172a
    // Ciphertext: f3eed1bdb5d2a03c064b5a7e3db181f8

    let key_vec =
        hex::decode("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4").unwrap();
    let mut key_array = [0u8; 32]; // AES-256 uses 32-byte keys
    key_array.copy_from_slice(&key_vec);
    let key = SecretBytes::new(key_array);

    let mut block = hex::decode("6bc1bee22e409f96e93d7e117393172a").unwrap();
    let expected = hex::decode("f3eed1bdb5d2a03c064b5a7e3db181f8").unwrap();

    let aes = Aes256::new(&key);
    aes.encrypt_block(&mut block).unwrap();

    assert_eq!(block, expected);
}

#[test]
fn test_aes256_decrypt() {
    // NIST test vector: AES-256-ECB
    // Key: 603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4
    // Ciphertext: f3eed1bdb5d2a03c064b5a7e3db181f8
    // Plaintext: 6bc1bee22e409f96e93d7e117393172a

    let key_vec =
        hex::decode("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4").unwrap();
    let mut key_array = [0u8; 32];
    key_array.copy_from_slice(&key_vec);
    let key = SecretBytes::new(key_array);

    let mut block = hex::decode("f3eed1bdb5d2a03c064b5a7e3db181f8").unwrap();
    let expected = hex::decode("6bc1bee22e409f96e93d7e117393172a").unwrap();

    let aes = Aes256::new(&key);
    aes.decrypt_block(&mut block).unwrap();

    assert_eq!(block, expected);
}

#[test]
fn test_aes_invalid_block_size() {
    let key_vec = hex::decode("2b7e151628aed2a6abf7158809cf4f3c").unwrap();
    let mut key_array = [0u8; 16];
    key_array.copy_from_slice(&key_vec);
    let key = SecretBytes::new(key_array);

    let mut invalid_block = hex::decode("6bc1bee22e409f96").unwrap(); // Only 8 bytes

    let aes = Aes128::new(&key);
    let result = aes.encrypt_block(&mut invalid_block);

    assert!(result.is_err());
    if let Err(Error::Length {
        context,
        expected,
        actual,
    }) = result
    {
        assert_eq!(context, "AES block");
        assert_eq!(expected, AES_BLOCK_SIZE);
        assert_eq!(actual, 8);
    } else {
        panic!("Expected Length error");
    }
}