AES加密在Linux上加密和解密都必须加上
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
random.setSeed(encryptKey.getBytes());
kgen.init(128,random);
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE,new SecretKeySpec(kgen.generateKey().getEncoded(),"AES"));
否则,因为持有的random对象不一样,导致每次密钥不一致。
加密工具类:
public class DESUtil {
/**
* 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 new BASE64Encoder().encode(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 IOException {
return StringUtils.isNullOrEmpty(base64Code)? null : new BASE64Decoder().decodeBuffer(base64Code);
}
/**
* 获取byte[]的md5值
* @param bytes byte[]
* @return md5
* @throws Exception
*/
public static byte[] md5(byte[] bytes) throws NoSuchAlgorithmException {
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(bytes);
return md.digest();
}
/**
* 获取字符串md5值
* @param msg
* @return md5
* @throws Exception
*/
public static byte[] md5(String msg) throws NoSuchAlgorithmException {
return StringUtils.isNullOrEmpty(msg) ? null : md5(msg.getBytes());
}
/**
* 结合base64实现md5加密
* @param msg 待加密字符串
* @return 获取md5后转为base64
* @throws Exception
*/
public static String md5Encrypt(String msg) throws NoSuchAlgorithmException {
return StringUtils.isNullOrEmpty(msg) ? null : base64Encode(md5(msg));
}
/**
* AES加密
* @param content 待加密的内容
* @param encryptKey 加密密钥
* @return 加密后的byte[]
* @throws Exception
*/
public static byte[] aesEncryptToBytes(String content,String encryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
random.setSeed(encryptKey.getBytes());
kgen.init(128,random);
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,encryptKey));
}
/**
* AES解密
* @param encryptBytes 待解密的byte[]
* @param decryptKey 解密密钥
* @return 解密后的String
* @throws Exception
*/
public static String aesDecryptByBytes(byte[] encryptBytes, String decryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
random.setSeed(decryptKey.getBytes());
kgen.init(128, random);
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);
}
/**
* 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.isNullOrEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
}
}