package org.jeecg.modules.iot.util;
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import org.apache.commons.lang3.StringUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.util.Base64Utils;
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import javax.crypto.Cipher;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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/**
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* AES加密工具类
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*
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* @author ACGkaka
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* @since 2021-06-18 19:11:03
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*/
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public class AESUtil {
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/**
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* 日志相关
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*/
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private static final Logger LOGGER = LoggerFactory.getLogger(AESUtil.class);
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/**
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* 编码
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*/
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private static final String ENCODING = "UTF-8";
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/**
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* 算法定义
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*/
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private static final String AES_ALGORITHM = "AES";
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/**
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* 指定填充方式
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*/
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private static final String CIPHER_PADDING = "AES/ECB/PKCS5Padding";
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private static final String CIPHER_CBC_PADDING = "AES/CBC/PKCS5Padding";
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/**
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* 偏移量(CBC中使用，增强加密算法强度)
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*/
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private static final String IV_SEED = "0000000000000000";
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/**
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* AES加密
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*
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* @param content 待加密内容
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* @param aesKey 密码
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* @return
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*/
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public static String encrypt(String content, String aesKey) {
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if (StringUtils.isBlank(content)) {
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LOGGER.info("AES encrypt: the content is null!");
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return null;
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}
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//判断秘钥是否为16位
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if (StringUtils.isNotBlank(aesKey) && aesKey.length() == 16) {
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try {
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//对密码进行编码
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byte[] bytes = aesKey.getBytes(ENCODING);
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//设置加密算法，生成秘钥
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SecretKeySpec skeySpec = new SecretKeySpec(bytes, AES_ALGORITHM);
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// "算法/模式/补码方式"
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Cipher cipher = Cipher.getInstance(CIPHER_PADDING);
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//选择加密
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cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
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//根据待加密内容生成字节数组
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byte[] encrypted = cipher.doFinal(content.getBytes(ENCODING));
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//返回base64字符串
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return Base64Utils.encodeToString(encrypted);
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} catch (Exception e) {
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LOGGER.info("AES encrypt exception:" + e.getMessage());
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throw new RuntimeException(e);
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}
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} else {
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LOGGER.info("AES encrypt: the aesKey is null or error!");
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return null;
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}
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}
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/**
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* 解密
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*
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* @param content 待解密内容
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* @param aesKey 密码
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* @return
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*/
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public static String decrypt(String content, String aesKey) {
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if (StringUtils.isBlank(content)) {
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LOGGER.info("AES decrypt: the content is null!");
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return null;
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}
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//判断秘钥是否为16位
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if (StringUtils.isNotBlank(aesKey) && aesKey.length() == 16) {
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try {
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//对密码进行编码
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byte[] bytes = aesKey.getBytes(ENCODING);
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//设置解密算法，生成秘钥
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SecretKeySpec skeySpec = new SecretKeySpec(bytes, AES_ALGORITHM);
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// "算法/模式/补码方式"
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Cipher cipher = Cipher.getInstance(CIPHER_PADDING);
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//选择解密
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cipher.init(Cipher.DECRYPT_MODE, skeySpec);
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//先进行Base64解码
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byte[] decodeBase64 = Base64Utils.decodeFromString(content);
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//根据待解密内容进行解密
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byte[] decrypted = cipher.doFinal(decodeBase64);
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//将字节数组转成字符串
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return new String(decrypted, ENCODING);
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} catch (Exception e) {
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LOGGER.info("AES decrypt exception:" + e.getMessage());
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throw new RuntimeException(e);
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}
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} else {
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LOGGER.info("AES decrypt: the aesKey is null or error!");
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return null;
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}
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}
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/**
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* AES_CBC加密
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*
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* @param content 待加密内容
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* @param aesKey 密码
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* @return
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*/
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public static String encryptCBC(String content, String aesKey) {
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if (StringUtils.isBlank(content)) {
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LOGGER.info("AES_CBC encrypt: the content is null!");
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return null;
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}
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//判断秘钥是否为16位
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if (StringUtils.isNotBlank(aesKey)) {
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try {
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//对密码进行编码
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byte[] bytes = aesKey.getBytes(ENCODING);
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//设置加密算法，生成秘钥
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SecretKeySpec skeySpec = new SecretKeySpec(bytes, AES_ALGORITHM);
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// "算法/模式/补码方式"
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Cipher cipher = Cipher.getInstance(CIPHER_CBC_PADDING);
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//偏移
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IvParameterSpec iv = new IvParameterSpec(IV_SEED.getBytes(ENCODING));
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//选择加密
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cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
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//根据待加密内容生成字节数组
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byte[] encrypted = cipher.doFinal(content.getBytes(ENCODING));
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//返回base64字符串
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return Base64Utils.encodeToString(encrypted);
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} catch (Exception e) {
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LOGGER.info("AES_CBC encrypt exception:" + e.getMessage());
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throw new RuntimeException(e);
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}
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} else {
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LOGGER.info("AES_CBC encrypt: the aesKey is null or error!");
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return null;
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}
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}
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/**
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* AES_CBC解密
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*
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* @param content 待解密内容
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* @param aesKey 密码
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* @return
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*/
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public static String decryptCBC(String content, String aesKey) {
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if (StringUtils.isBlank(content)) {
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LOGGER.info("AES_CBC decrypt: the content is null!");
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return null;
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}
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//判断秘钥是否为16位
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if (StringUtils.isNotBlank(aesKey)) {
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try {
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//对密码进行编码
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byte[] bytes = aesKey.getBytes(ENCODING);
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//设置解密算法，生成秘钥
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SecretKeySpec skeySpec = new SecretKeySpec(bytes, AES_ALGORITHM);
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//偏移
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IvParameterSpec iv = new IvParameterSpec(IV_SEED.getBytes(ENCODING));
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// "算法/模式/补码方式"
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Cipher cipher = Cipher.getInstance(CIPHER_CBC_PADDING);
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//选择解密
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cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
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//先进行Base64解码
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byte[] decodeBase64 = Base64Utils.decodeFromString(content);
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//根据待解密内容进行解密
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byte[] decrypted = cipher.doFinal(decodeBase64);
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//将字节数组转成字符串
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return new String(decrypted, ENCODING);
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} catch (Exception e) {
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LOGGER.info("AES_CBC decrypt exception:" + e.getMessage());
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throw new RuntimeException(e);
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}
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} else {
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LOGGER.info("AES_CBC decrypt: the aesKey is null or error!");
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return null;
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}
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}
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}
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