这篇文章主要介绍“AES加解密算法怎么实现”,在日常操作中,相信很多人在AES加解密算法怎么实现问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”AES加解密算法怎么实现”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
/**
* base 64 encode
* @param bytes 待编码的byte[]
* @return 编码后的base 64 code
*/
public static String base64Encode(byte[] bytes){
return Base64.encodeBase64String(bytes);
}
/**
* base 64 decode
* @param base64Code 待解码的base 64 code
* @return 解码后的byte[]
* @throws Exception
*/
public static byte[] base64Decode(String base64Code) throws Exception{
return StringUtils.isEmpty(base64Code) ? null : Base64.decodeBase64(base64Code);
}
public static byte[] aesEncryptToBytes(String content, byte[] encryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgenInit(kgen, encryptKey);
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));
return cipher.doFinal(content.getBytes("utf-8"));
}
/**
* AES加密为base 64 code
* @param content 待加密的内容
* @param encryptKey 加密密钥
* @return 加密后的base 64 code
* @throws Exception
*/
public static String aesEncrypt(String content, String encryptKey) throws Exception {
return base64Encode(aesEncryptToBytes(content, getAESKey(encryptKey)));
}
public static String aesDecryptByBytes(byte[] encryptBytes, byte[] decryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgenInit(kgen, decryptKey);
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES"));
byte[] decryptBytes = cipher.doFinal(encryptBytes);
return new String(decryptBytes,"utf-8");
}
/**
* 将base 64 code AES解密
* @param encryptStr 待解密的base 64 code
* @param decryptKey 解密密钥
* @return 解密后的string
* @throws Exception
*/
public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
return StringUtils.isEmpty(encryptStr)
? null : aesDecryptByBytes(base64Decode(encryptStr), getAESKey(decryptKey));
}
public static byte[] getAESKey(String encodingAESKey){
byte[] array = Base64.decodeBase64(encodingAESKey+"=");
return array;
}
/**
**防止在linux下随机生成key
* @param kgen
* @param bytes
* @throws NoSuchAlgorithmException
*/
public static void kgenInit(KeyGenerator kgen, byte[] bytes)
throws NoSuchAlgorithmException {
//1.防止linux下 随机生成key
SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG" );
secureRandom.setSeed(bytes);
//2.根据密钥初始化密钥生成器
kgen.init(128, secureRandom);
}
public static void main(String[] args) throws Exception {
/** 测试线secret_key */
String encoding_aes_key="88assadsfsdfsffsf6dsfsdfd";
/** 参数加密 */
String encrypt = aesEncrypt(content, encoding_aes_key);
System.out.println("加密后:" + encrypt);
/** 参数解密 */
String decrypt = aesDecrypt(encrypt, encoding_aes_key);
System.out.println("解密后:" + decrypt);
}
到此,关于“AES加解密算法怎么实现”的学习就结束了,希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习,快去试试吧!若想继续学习更多相关知识,请继续关注天达云网站,小编会继续努力为大家带来更多实用的文章!