Review

Uses AES with default mode and padding which is considered a bad practice.

• missing/condition/value_or_state

com/vouov/yapps/util/AESUtils.java

aes(int, String, byte[])

class AESUtils {
    /**
     * AES 加解密
     * @param mode
     * @param password
     * @param textBytes
     * @return
     * @throws Exception
     */
    public static byte[] aes(int mode, String password, byte[] textBytes) throws Exception{
        KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
        //for windows and linux, the secure random need select a algorithm
        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
        secureRandom.setSeed(password.getBytes("utf-8"));
        keyGenerator.init(128, secureRandom);
        SecretKey secretKey = keyGenerator.generateKey();
        byte[] encoded = secretKey.getEncoded();
        SecretKeySpec secretKeySpec = new SecretKeySpec(encoded, "AES");
        Cipher cipher = Cipher.getInstance("AES");// 创建密码器
        cipher.init(mode, secretKeySpec);// 初始化
        return cipher.doFinal(textBytes);
    }

}

public class AES {
	public void encrypt(String strDataToEncrypt) {
		try {
			KeyGenerator keyGen = KeyGenerator.getInstance("AES");
			keyGen.init(128);
			SecretKey secretKey = keyGen.generateKey();
			final int AES_KEYLENGTH = 128;
			byte[] iv = new byte[AES_KEYLENGTH / 8];
			SecureRandom prng = new SecureRandom();
			prng.nextBytes(iv);
			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
			cipher.init(Cipher.ENCRYPT_MODE, secretKey, 
					new IvParameterSpec(iv));
			
			byte[] byteDataToEncrypt = strDataToEncrypt.getBytes();
			byte[] byteCipherText = cipher.doFinal(byteDataToEncrypt);
		}
		catch (NoSuchAlgorithmException noSuchAlgo) {
		}
		catch (NoSuchPaddingException noSuchPad) {
		}
		catch (InvalidKeyException invalidKey) {
		}
		catch (BadPaddingException badPadding) {
		}
		catch (IllegalBlockSizeException illegalBlockSize) {
		}
		catch (InvalidAlgorithmParameterException invalidParam) {
		}
	}
	public void decrypt(byte[] cipherText, SecretKey secretKey, byte[] iv){
		try {
			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
			cipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(iv));
			byte[] byteDecryptedText = cipher.doFinal(cipherText);
			String decryptedText = new String(byteDecryptedText);
		}
		catch (NoSuchAlgorithmException noSuchAlgo) {
		}
		catch (NoSuchPaddingException noSuchPad) {
		}
		catch (InvalidKeyException invalidKey) {
		}
		catch (BadPaddingException badPadding) {
		}
		catch (IllegalBlockSizeException illegalBlockSize) {
		}
		catch (InvalidAlgorithmParameterException invalidParam) {
		}
	}
}