98 lines
3.1 KiB
Java
98 lines
3.1 KiB
Java
package com.dcsoft.auth.utils;
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import org.springframework.util.Base64Utils;
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import javax.crypto.KeyGenerator;
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import javax.crypto.*;
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import javax.crypto.spec.SecretKeySpec;
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import java.security.NoSuchAlgorithmException;
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import java.security.NoSuchProviderException;
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import java.security.SecureRandom;
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/**
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* @version V1.0
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* @desc AES 加密工具类
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*/
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public class AESUtils {
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/**
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* RSA加密后的AES秘钥
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*/
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private static String aesEncyptPwd="ZIkun+KvXFWLZLYUwXqFWazQeRe119AkcGcl+p8Erzi4EEaHBFYcQuGuKthIE+1IWSQxoUpUJkT0T1+xtoRi3txDnBikdrFhccGZdRpqwRv58q5nqxJX4wVrq0Ms02KBKgQRTqqlzfYLzQcYPyhv8KPE8JDVkttic+W+j5pFles=";
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private static final String KEY_ALGORITHM = "AES";
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private static final String DEFAULT_CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";
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/**
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* AES 加密操作
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*
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* @param content 待加密内容
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* @return 返回Base64转码后的加密数据
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*/
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public static String encrypt(String content) {
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try {
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Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
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byte[] byteContent = content.getBytes("utf-8");
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cipher.init(Cipher.ENCRYPT_MODE, getSecretKey(RSAUtils.decrypt(aesEncyptPwd)));
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byte[] result = cipher.doFinal(byteContent);
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return Base64Utils.encodeToString(result);
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} catch (Exception ex) {
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ex.printStackTrace();
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System.out.println("AES加密失败");
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}
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return null;
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}
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/**
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* AES 解密操作
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*
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* @param content 已加密内容
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* @return
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*/
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public static String decrypt(String content) {
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try {
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//实例化
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Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
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//使用密钥初始化，设置为解密模式
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cipher.init(Cipher.DECRYPT_MODE, getSecretKey(RSAUtils.decrypt(aesEncyptPwd)));
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//执行操作
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byte[] result = cipher.doFinal(Base64Utils.decodeFromString(content));
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return new String(result, "utf-8");
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} catch (Exception ex) {
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ex.printStackTrace();
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System.out.println("AES解密失败");
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}
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return null;
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}
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/**
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* 生成加密秘钥
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*
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* @return
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*/
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private static SecretKeySpec getSecretKey(String aesKey) {
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//返回生成指定算法密钥生成器的 KeyGenerator 对象
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KeyGenerator kg = null;
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try {
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kg = KeyGenerator.getInstance(KEY_ALGORITHM);
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//AES 要求密钥长度为 128
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SecureRandom random=SecureRandom.getInstance("SHA1PRNG","SUN");
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random.setSeed(aesKey.getBytes());
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kg.init(128, random);
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//生成一个密钥
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SecretKey secretKey = kg.generateKey();
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return new SecretKeySpec(secretKey.getEncoded(), KEY_ALGORITHM);
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} catch (NoSuchAlgorithmException ex) {
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ex.printStackTrace();
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System.out.println("生成加密秘钥失败");
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} catch (NoSuchProviderException e) {
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e.printStackTrace();
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System.out.println("生成加密秘钥失败");
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}
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return null;
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}
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}
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