package com.panzhihua.common.model.helper;
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import java.io.UnsupportedEncodingException;
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import java.nio.charset.StandardCharsets;
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import java.security.InvalidKeyException;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.security.spec.KeySpec;
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import java.util.Arrays;
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import java.util.Base64;
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import javax.crypto.*;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.PBEKeySpec;
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import javax.crypto.spec.SecretKeySpec;
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/**
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* AES 工具类
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*/
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public class AESUtil {
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private static SecretKeySpec secretKey;
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private static byte[] key;
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/**
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* AES 256 加密
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*
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* @param strToEncrypt
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* 要加密的字符串
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* @param secKey
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* 秘钥
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* @param salt
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* 盐
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* @return 加密后的字符串
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*/
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public static String encrypt256(String strToEncrypt, String secKey, String salt) {
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try {
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byte[] iv = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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IvParameterSpec ivspec = new IvParameterSpec(iv);
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SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
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KeySpec spec = new PBEKeySpec(secKey.toCharArray(), salt.getBytes(), 65536, 256);
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SecretKey tmp = factory.generateSecret(spec);
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SecretKeySpec secretKey = new SecretKeySpec(tmp.getEncoded(), "AES");
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
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cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivspec);
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return Base64.getEncoder().encodeToString(cipher.doFinal(strToEncrypt.getBytes(StandardCharsets.UTF_8)));
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} catch (Exception e) {
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System.out.println("Error while encrypting: " + e.toString());
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}
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return null;
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}
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/**
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* AES 256 解密
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*
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* @param strToDecrypt
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* 要解密的字符串
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* @param secKey
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* 秘钥
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* @param salt
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* 盐
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* @return 解密后的字符串
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*/
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public static String decrypt256(String strToDecrypt, String secKey, String salt) {
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try {
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byte[] iv = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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IvParameterSpec ivspec = new IvParameterSpec(iv);
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SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
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KeySpec spec = new PBEKeySpec(secKey.toCharArray(), salt.getBytes(), 65536, 256);
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SecretKey tmp = factory.generateSecret(spec);
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SecretKeySpec secretKey = new SecretKeySpec(tmp.getEncoded(), "AES");
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Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
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cipher.init(Cipher.DECRYPT_MODE, secretKey, ivspec);
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return new String(cipher.doFinal(Base64.getDecoder().decode(strToDecrypt)));
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} catch (Exception e) {
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System.out.println("Error while decrypting: " + e.toString());
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}
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return null;
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}
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public static void setKey(String myKey) {
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MessageDigest sha = null;
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try {
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key = myKey.getBytes(StandardCharsets.UTF_8);
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sha = MessageDigest.getInstance("SHA-1");
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key = sha.digest(key);
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key = Arrays.copyOf(key, 16);
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secretKey = new SecretKeySpec(key, "AES");
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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}
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}
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/**
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* AES 128(base64)加密
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*
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* @param strToEncrypt
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* 要加密的字符串
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* @param secret
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* 秘钥
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* @return 加密后的字符串
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*/
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public static String encrypt128(String strToEncrypt, String secret)
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throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, UnsupportedEncodingException,
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BadPaddingException, IllegalBlockSizeException {
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setKey(secret);
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Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
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cipher.init(Cipher.ENCRYPT_MODE, secretKey);
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return Base64.getEncoder().encodeToString(cipher.doFinal(strToEncrypt.getBytes(StandardCharsets.UTF_8)));
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}
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/**
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* AES 128(base64) 解密
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*
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* @param strToDecrypt
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* 要解密的字符串
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* @param secret
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* 秘钥
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* @return 解密后的字符串
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*/
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public static String decrypt128(String strToDecrypt, String secret) throws NoSuchPaddingException,
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NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException, InvalidKeyException {
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setKey(secret);
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Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
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cipher.init(Cipher.DECRYPT_MODE, secretKey);
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return new String(cipher.doFinal(Base64.getDecoder().decode(strToDecrypt)));
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}
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}
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class AES256Example {
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public static void main(String[] args) {
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String originalString = "howtodoinjava.com";
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String secKey = "this is my super secrt key";
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String salt = "salt for me!!!";
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String encryptedString = AESUtil.encrypt256(originalString, secKey, salt);
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String decryptedString = AESUtil.decrypt256(encryptedString, secKey, salt);
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System.out.println(originalString);
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System.out.println(encryptedString);
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System.out.println(decryptedString);
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}
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}
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class AES128Example {
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public static void main(String[] args) {
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String[] originalString = new String[] {"51011234567892013", "13612345678", "四川省成都市高新区", "四川省成都市高新"};
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String key = "5165465461dsfas";
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Arrays.stream(originalString).forEach(os -> {
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try {
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String encryptedString = AESUtil.encrypt128(os, key);
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String decryptedString = AESUtil.decrypt128(encryptedString, key);
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System.out.println(os);
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System.out.println(encryptedString);
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System.out.println(decryptedString);
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} catch (Exception e) {
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e.printStackTrace();
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}
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});
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}
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}
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