关于js端和java端AES加解密

js端AES加密:前置条件：引入aes.min.js文件function aesMinEncrypt(word){var _word = CryptoJS.enc.Utf8.parse(word),_key = CryptoJS.enc.Utf8.parse("csdnIsVeryGood_Key"),...

南猿北辙

804人浏览 · 2019-10-11 13:50:50

南猿北辙 · 2019-10-11 13:50:50 发布

js端AES加密:

前置条件：引入aes.min.js文件

        function aesMinEncrypt(word){
            var _word = CryptoJS.enc.Utf8.parse(word),
                _key = CryptoJS.enc.Utf8.parse("csdnIsVeryGood_Key"),
                _iv = CryptoJS.enc.Utf8.parse("csdnIsVeryGood_Iv");
            var encrypted = CryptoJS.AES.encrypt(_word, _key, {
                        iv: _iv,
                        mode: CryptoJS.mode.CBC,
                        padding: CryptoJS.pad.Pkcs7
                });
            return encrypted.toString();
        }

js端AES解密:

function aesDecrypt(word) {
    var _key = CryptoJS.enc.Utf8.parse("csdnIsVeryGood_Key"),
        _iv = CryptoJS.enc.Utf8.parse("csdnIsVeryGood_Iv");
    var decrypted = CryptoJS.AES.decrypt(word, _key, {
                iv: _iv,
                mode: CryptoJS.mode.CBC,
                padding: CryptoJS.pad.Pkcs7
        });
    return decrypted.toString(CryptoJS.enc.Utf8);
}

注意事项:

JS加密后：

Wcb0LwF8WHOeQa2AlS8ZNPyYP0JVr+ROCWOqgvfcjX0VzyFbZrx0k7vOLwGiG2FIRhPYCV6RTvr06232o8U1eijgvHIm+OG1mek5NPymd0LQl6+i+8sPUe8ClI72qtcT

JS端传递到JAVA端后：

Wcb0LwF8WHOeQa2AlS8ZNPyYP0JVr ROCWOqgvfcjX0VzyFbZrx0k7vOLwGiG2FIRhPYCV6RTvr06232o8U1eijgvHIm OG1mek5NPymd0LQl6 i 8sPUe8ClI72qtcT

遇到问题:加密后的密文存在加号(+),传递到JAVA端后加号变成了空格 “+” -> “ ”，导致JAVA端解密报错。

解决方法：将js端的密文中的加号+ 替换为 %2B进行传递。

ftpInfo = ftpInfo.replace(/\+/g, '%2B');

JAVA端AES加解密工具类:

必要jar包：

org.apache.commons.codec.jar

org.apache.commons.lang.jar

public class AesUtils {

   //密钥 (需要前端和后端保持一致)十六位作为密钥
   private static final String KEY = "csdnIsVeryGood_Key";

   //密钥偏移量 (需要前端和后端保持一致)十六位作为密钥偏移量
   private static final String IV = "csdnIsVeryGood_Iv";

   //算法
   private static final String ALGORITHMSTR = "AES/CBC/PKCS5Padding";

   /**
   * 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 Exception{
   return StringUtils.isEmpty(base64Code) ? null : new Base64().decodeBase64(new String(base64Code).getBytes());
   }

   /**
   * AES解密
   * @param encryptBytes 待解密的byte[]
   * @return 解密后的String
   * @throws Exception
   */
   public static String aesDecryptByBytes(byte[] encryptBytes) throws Exception {

   Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
   byte[] temp = IV.getBytes("UTF-8");
   IvParameterSpec iv = new IvParameterSpec(temp);
   cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(KEY.getBytes(), "AES"), iv);
   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
   * @return 解密后的string
   * @throws Exception
   */
   public static String aesDecrypt(String encryptStr) throws Exception {
// encryptStr = encryptStr.replaceAll(",", "+");
   return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr));
   }
   public static String encryptString(String str) {
   try {
       Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
   IvParameterSpec iv = new IvParameterSpec(IV.getBytes("US-ASCII"));
   cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(KEY.getBytes("US-ASCII"), "AES"), iv);
   byte[] encryptBytes = cipher.doFinal(str.getBytes("UTF-8"));
   return new String(Base64.encodeBase64(encryptBytes),"US-ASCII");
   }catch (Exception e) {
   e.printStackTrace();
   return "";
   }
   }
}