8.24 解密/加密工具类

sp-core/sp-base/src/main/java/com/pj/utils/ht/AESUtil.java

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+package com.pj.utils.ht;
+
+import org.apache.commons.lang3.RandomStringUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.util.Base64Utils;
+
+import javax.crypto.Cipher;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+/**
+ * AES加密工具类
+ *
+ * @author SCH
+ * @since 2023-08-21 15:11:03
+ */
+public class AESUtil {
+    /**
+     * 日志相关
+     */
+    private static final Logger LOGGER = LoggerFactory.getLogger(AESUtil.class);
+    /**
+     * 编码
+     */
+    private static final String ENCODING = "UTF-8";
+    /**
+     * 算法定义
+     */
+    private static final String AES_ALGORITHM = "AES";
+    /**
+     * 指定填充方式
+     */
+    private static final String CIPHER_PADDING = "AES/ECB/PKCS5Padding";
+    private static final String CIPHER_CBC_PADDING = "AES/CBC/PKCS5Padding";
+    /**
+     * 偏移量(CBC中使用，增强加密算法强度)
+     */
+    private static final String IV_SEED = "1234567812345678";
+
+    /**
+     * AES加密
+     * @param content 待加密内容
+     * @param aesKey  密码
+     * @return
+     */
+    public static String encrypt(String content, String aesKey){
+        if(StringUtils.isBlank(content)){
+            LOGGER.info("AES encrypt: the content is null!");
+            return null;
+        }
+        //判断秘钥是否为16位
+        if(StringUtils.isNotBlank(aesKey) && aesKey.length() == 16){
+            try {
+                //对密码进行编码
+                byte[] bytes = aesKey.getBytes(ENCODING);
+                //设置加密算法，生成秘钥
+                SecretKeySpec skeySpec = new SecretKeySpec(bytes, AES_ALGORITHM);
+                // "算法/模式/补码方式"
+                Cipher cipher = Cipher.getInstance(CIPHER_PADDING);
+                //选择加密
+                cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
+                //根据待加密内容生成字节数组
+                byte[] encrypted = cipher.doFinal(content.getBytes(ENCODING));
+                //返回base64字符串
+                return Base64Utils.encodeToString(encrypted);
+            } catch (Exception e) {
+                LOGGER.info("AES encrypt exception:" + e.getMessage());
+                throw new RuntimeException(e);
+            }
+
+        }else {
+            LOGGER.info("AES encrypt: the aesKey is null or error!");
+            return null;
+        }
+    }
+
+    /**
+     * 解密
+     *
+     * @param content 待解密内容
+     * @param aesKey  密码
+     * @return
+     */
+    public static String decrypt(String content, String aesKey){
+        if(StringUtils.isBlank(content)){
+            LOGGER.info("AES decrypt: the content is null!");
+            return null;
+        }
+        //判断秘钥是否为16位
+        if(StringUtils.isNotBlank(aesKey) && aesKey.length() == 16){
+            try {
+                //对密码进行编码
+                byte[] bytes = aesKey.getBytes(ENCODING);
+                //设置解密算法，生成秘钥
+                SecretKeySpec skeySpec = new SecretKeySpec(bytes, AES_ALGORITHM);
+                // "算法/模式/补码方式"
+                Cipher cipher = Cipher.getInstance(CIPHER_PADDING);
+                //选择解密
+                cipher.init(Cipher.DECRYPT_MODE, skeySpec);
+
+                //先进行Base64解码
+                byte[] decodeBase64 = Base64Utils.decodeFromString(content);
+
+                //根据待解密内容进行解密
+                byte[] decrypted = cipher.doFinal(decodeBase64);
+                //将字节数组转成字符串
+                return new String(decrypted, ENCODING);
+            } catch (Exception e) {
+                LOGGER.info("AES decrypt exception:" + e.getMessage());
+                throw new RuntimeException(e);
+            }
+
+        }else {
+            LOGGER.info("AES decrypt: the aesKey is null or error!");
+            return null;
+        }
+    }
+
+    /**
+     * AES_CBC加密
+     *
+     * @param content 待加密内容
+     * @param aesKey  密码
+     * @return
+     */
+    public static String encryptCBC(String content, String aesKey){
+        if(StringUtils.isBlank(content)){
+            LOGGER.info("AES_CBC encrypt: the content is null!");
+            return null;
+        }
+        //判断秘钥是否为16位
+        if(StringUtils.isNotBlank(aesKey) && aesKey.length() == 16){
+            try {
+                //对密码进行编码
+                byte[] bytes = aesKey.getBytes(ENCODING);
+                //设置加密算法，生成秘钥
+                SecretKeySpec skeySpec = new SecretKeySpec(bytes, AES_ALGORITHM);
+                // "算法/模式/补码方式"
+                Cipher cipher = Cipher.getInstance(CIPHER_CBC_PADDING);
+                //偏移
+                IvParameterSpec iv = new IvParameterSpec(IV_SEED.getBytes(ENCODING));
+                //选择加密
+                cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
+                //根据待加密内容生成字节数组
+                byte[] encrypted = cipher.doFinal(content.getBytes(ENCODING));
+                //返回base64字符串
+                return Base64Utils.encodeToString(encrypted);
+            } catch (Exception e) {
+                LOGGER.info("AES_CBC encrypt exception:" + e.getMessage());
+                throw new RuntimeException(e);
+            }
+
+        }else {
+            LOGGER.info("AES_CBC encrypt: the aesKey is null or error!");
+            return null;
+        }
+    }
+
+    /**
+     * AES_CBC解密
+     *
+     * @param content 待解密内容
+     * @param aesKey  密码
+     * @return
+     */
+    public static String decryptCBC(String content, String aesKey){
+        if(StringUtils.isBlank(content)){
+            LOGGER.info("AES_CBC decrypt: the content is null!");
+            return null;
+        }
+        //判断秘钥是否为16位
+        if(StringUtils.isNotBlank(aesKey) && aesKey.length() == 16){
+            try {
+                //对密码进行编码
+                byte[] bytes = aesKey.getBytes(ENCODING);
+                //设置解密算法，生成秘钥
+                SecretKeySpec skeySpec = new SecretKeySpec(bytes, AES_ALGORITHM);
+                //偏移
+                IvParameterSpec iv = new IvParameterSpec(IV_SEED.getBytes(ENCODING));
+                // "算法/模式/补码方式"
+                Cipher cipher = Cipher.getInstance(CIPHER_CBC_PADDING);
+                //选择解密
+                cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
+
+                //先进行Base64解码
+                byte[] decodeBase64 = Base64Utils.decodeFromString(content);
+
+                //根据待解密内容进行解密
+                byte[] decrypted = cipher.doFinal(decodeBase64);
+                //将字节数组转成字符串
+                return new String(decrypted, ENCODING);
+            } catch (Exception e) {
+                LOGGER.info("AES_CBC decrypt exception:" + e.getMessage());
+                throw new RuntimeException(e);
+            }
+
+        }else {
+            LOGGER.info("AES_CBC decrypt: the aesKey is null or error!");
+            return null;
+        }
+    }
+
+    public static void main(String[] args) {
+        // AES支持三种长度的密钥：128位、192位、256位。
+        // 代码中这种就是128位的加密密钥，16字节 * 8位/字节 = 128位。
+        String random = RandomStringUtils.random(16, "abcdefghijklmnopqrstuvwxyz1234567890");
+        System.out.println("随机key:" + random);
+        System.out.println();
+
+        System.out.println("---------加密---------");
+        String aesResult = encrypt("测试AES加密12", random);
+        System.out.println("aes加密结果:" + aesResult);
+        System.out.println();
+
+        System.out.println("---------解密---------");
+        String decrypt = decrypt(aesResult, random);
+        System.out.println("aes解密结果:" + decrypt);
+        System.out.println();
+
+
+        System.out.println("--------AES_CBC加密解密---------");
+        String cbcResult = encryptCBC("测试AES加密12456", random);
+        System.out.println("aes_cbc加密结果:" + cbcResult);
+        System.out.println();
+
+        System.out.println("---------解密CBC---------");
+        String cbcDecrypt = decryptCBC(cbcResult, random);
+        System.out.println("aes解密结果:" + cbcDecrypt);
+        System.out.println();
+    }
+}