JAVA C# 3DES ECB加解密，24位密码

基于3des  ecb模式加密，密码为24位。

c#  JAVA通用

C#代码 

/// <summary>
    /// C# DES3加密解密
    /// </summary>
    public class Des3
    {

        #region ECB模式
        byte[] IV = Encoding.UTF8.GetBytes("12345678");
        public static string netEncrypt(string content, string key)
        {
            try
            {

                var tDes = new TripleDESCryptoServiceProvider
                {
                     Key = Encoding.UTF8.GetBytes(key.Substring(0, 24)),//长度必须24个字节
                     Mode = CipherMode.ECB,
                    IV = IV
                };
                var desEncrypt = tDes.CreateEncryptor();
                byte[] buffer = Encoding.UTF8.GetBytes(content);
                return Convert.ToBase64String(desEncrypt.TransformFinalBlock(buffer, 0, buffer.Length));
             }
            catch (Exception e)
            {
                 return string.Empty;
            }
        }

        public static string netDecrypt(string content, string key)
        {
             try
            {
                var tDes = new TripleDESCryptoServiceProvider
                {
                    Key = Encoding.UTF8.GetBytes(key.Substring(0, 24)),//长度必须24个字节
                     Mode = CipherMode.ECB,
                    Padding = PaddingMode.PKCS7
                };

                var desDecrypt = tDes.CreateDecryptor();
                byte[] buffer = Convert.FromBase64String(content);
                var result = Encoding.UTF8.GetString(desDecrypt.TransformFinalBlock(buffer, 0, buffer.Length));
                return result;
            }
             catch (Exception e)
            {
                return string.Empty;
            }
        }
        #endregion
    }

Java代码 

**
* java 3des ECB加解密
**/
public class Des3{
     public static String get3DESEncryptECB(String src, String secretKey) {
        try {
            Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
            cipher.init(1, new SecretKeySpec(build3DesKey(secretKey), "DESede"));
            String base64Encode = getBase64Encode(cipher.doFinal(src.getBytes("UTF-8")));
            return filter(base64Encode);
        } catch (Exception var4) {
            return null;
        }
    }

    public static String get3DESDecryptECB(String src, String secretKey) {
        try {
            Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
            cipher.init(2, new SecretKeySpec(build3DesKey(secretKey), "DESede"));
            byte[] base64DValue = getBase64Decode(src);
            byte[] ciphertext = cipher.doFinal(base64DValue);
            return new String(ciphertext, "UTF-8");
        } catch (Exception var5) {
            return null;
        }
    }

    public static String getBase64Encode(byte[] src) {
        String requestValue = "";

        try {
            BASE64Encoder base64en = new BASE64Encoder();
            requestValue = filter(base64en.encode(src));
        } catch (Exception var3) {
            var3.printStackTrace();
        }

        return requestValue;
    }
     public static byte[] build3DesKey(String keyStr) throws UnsupportedEncodingException {
        byte[] key = new byte[24];
        byte[] temp = keyStr.getBytes("UTF-8");
        if (key.length > temp.length) {
            System.arraycopy(temp, 0, key, 0, temp.length);
        } else {
            System.arraycopy(temp, 0, key, 0, key.length);
        }

        return key;
    }
}

亲测好使