AES SHA1PRNG加密与解密工具类

java端使用了AES SHA1PRNG进行数据传输加密工具类

import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import org.apache.commons.codec.binary.Base64;

public class AESEncryptionUtil {

    public static String encrypt(String seed, byte[] original) {
        try {
            return new String(Base64.encodeBase64(getCipher(seed, Cipher.ENCRYPT_MODE).doFinal(original)));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static byte[] decrypt(String seed, byte[] encrypted) {
        try {
            return getCipher(seed, Cipher.DECRYPT_MODE).doFinal(Base64.decodeBase64(encrypted));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return null;
    }

    private static Cipher getCipher(String seed, int encryptMode) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException {
        //生成加密随机数
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
        //并设置seed
        random.setSeed(seed.getBytes());
        //创建AES生产者
        KeyGenerator generator = KeyGenerator.getInstance("AES");
        //初始化生产者，128位
        generator.init(128, random);
        // 返回基本编码格式的密钥，如果此密钥不支持编码，则返回null。
        byte[] enCodeFormat = generator.generateKey().getEncoded();
        // 转换为AES专用密钥
        SecretKey key = new SecretKeySpec(enCodeFormat, "AES");
        // 创建密码器
        Cipher cipher = Cipher.getInstance("AES");
        //初始化解码器,这里根据是加密模式还是解码模式
        cipher.init(encryptMode, key);
        return cipher;
    }
}