【Java加密解密】AES加密算法

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AES加密和解密JDK和BC代码

// JDK AES算法实现private static void jdkAES() {try {// 生成密钥KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");keyGenerator.getProvider();System.out.println(keyGenerator.getProvider());keyGenerator.init(new SecureRandom());SecretKey secretKey = keyGenerator.generateKey();byte[] bytesKey = secretKey.getEncoded();// key转换SecretKeySpec key = new SecretKeySpec(bytesKey, "AES");// 加密Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");cipher.init(Cipher.ENCRYPT_MODE, key);String src = "加密的字符串";byte[] result = cipher.doFinal(src.getBytes());System.out.println("result aes encrypt:"+ Hex.encodeHexString(result));// 解密cipher.init(Cipher.DECRYPT_MODE, key);result = cipher.doFinal(result);System.out.println("result aes decrypt:" + new String(result));} catch (Exception e) {e.printStackTrace();}}// bc的AES实现private static void bcAES() {try {Security.addProvider(new BouncyCastleProvider());// 生成密钥KeyGenerator keyGenerator = KeyGenerator.getInstance("AES", "BC");keyGenerator.getProvider();System.out.println(keyGenerator.getProvider());keyGenerator.init(new SecureRandom());//AES算法，长度超过128位，受到美国法律限制，需要替换授权SecretKey secretKey = keyGenerator.generateKey();byte[] bytesKey = secretKey.getEncoded();// key转换SecretKeySpec key = new SecretKeySpec(bytesKey, "AES");// 加密Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");cipher.init(Cipher.ENCRYPT_MODE, key);String src = "加密的字符串";byte[] result = cipher.doFinal(src.getBytes());System.out.println("result aes encrypt:"+ Hex.encodeHexString(result));// 解密cipher.init(Cipher.DECRYPT_MODE, key);result = cipher.doFinal(result);System.out.println("result aes decrypt:" + new String(result));} catch (Exception e) {e.printStackTrace();}}

BC实现的时候如果超过128，会报错。这是美国法律的规定。

解决方法网上有可以替换jar来搞定。

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