unity MD5/AES加密

本文转载自https://hiramtan.wordpress.com

第一部分,MD5加密:

涉及到账号密码加密,以为是规定一个密钥,客户端根据密钥加密后传输给服务器,服务器根据密钥解密后验证密码是否正确,这样的话后端程序完全了解客户的帐号密码是多少.或者是已这种方式实现:客户端加密账号密码后发送给服务端,服务端存储玩家的账号密码的密文,登陆时验证玩家的密文就可以.

最常用的是md5加密,visual中代码如下:

using  System.Text;

namespace  Md5NamaSpace

{

     public  class  MyMd5

    {

         /// 

         ///  md5加密方法

         /// 

         ///  需要加密的字符串 

         /// 

         public  static  string  StringToMd5( string  tempString)

        {

            System.Security.Cryptography.  MD5  md5 = System.Security.Cryptography. MD5 .Create();

             byte [] bs =  Encoding .UTF8.GetBytes(tempString);

             byte [] hs = md5.ComputeHash(bs);

             return  System.  BitConverter .ToString(hs).Replace(  “-“ ,  “” );

        }

    }

}

然后打包成dll,复制到unity的asset文加件下,在unity中引用命名空间,直接调用类中的方法就可以了:

using  UnityEngine;

using  System.Collections;

using  Md5NamaSpace;

using  System.Text;

public  class  test  :  MonoBehaviour

{

     // Use this for initialization

     void  Start()

    {

         string  test =  MyMd5 .StringToMd5( “nihao” );

         Debug .Log(test);

    }

}

debug出来的信息就是nihao的md5加密后的值.

 

第二部分,AES加密:

使用unity中的socket传输游戏中的数据,必定要做加密解密功能,本次采用的是aes加密(des升级版),封装dll然后unity3d中调用使用.如下

using System;

namespace MyEncryptionNamespace

{

    ///

    /// aes 加密

    ///

    public class MyEncryption

    {

        ///

        /// 32位密钥

        ///

        public static string key;

        ///

        /// 加密

        ///

        /// 被加密数据

        ///

        public static string Encrypt( string toEncrypt)

        {

            Byte [] keyArray = System.Text. UTF8Encoding .UTF8.GetBytes(key);

            Byte [] toEncryptArray = System.Text. UTF8Encoding .UTF8.GetBytes(toEncrypt);

            System.Security.Cryptography. RijndaelManaged aes = new System.Security.Cryptography. RijndaelManaged ();

            aes.Key = keyArray;

            aes.Mode = System.Security.Cryptography. CipherMode .ECB;

            aes.Padding = System.Security.Cryptography. PaddingMode .PKCS7;

            System.Security.Cryptography. ICryptoTransform cTransform = aes.CreateEncryptor();

            Byte [] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            return Convert .ToBase64String(resultArray, 0, resultArray.Length);

        }

        ///

        /// 加密密码

        ///

        /// 被加密数据

        ///

        public static string EncryptPassword( string toEncrypt)

        {

            string keyForPassword = “qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq” ;

            Byte [] keyArray = System.Text. UTF8Encoding .UTF8.GetBytes(keyForPassword);

            Byte [] toEncryptArray = System.Text. UTF8Encoding .UTF8.GetBytes(toEncrypt);

            System.Security.Cryptography. RijndaelManaged aes = new System.Security.Cryptography. RijndaelManaged ();

            aes.Key = keyArray;

            aes.Mode = System.Security.Cryptography. CipherMode .ECB;

            aes.Padding = System.Security.Cryptography. PaddingMode .PKCS7;

            System.Security.Cryptography. ICryptoTransform cTransform = aes.CreateEncryptor();

            Byte [] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);

            return Convert .ToBase64String(resultArray, 0, resultArray.Length);

        }

        ///

        /// 解密

        ///

        /// 被解密数据

        ///

        public static string Decrypt( string toDecrypt)

        {

            Byte [] keyArray = System.Text. UTF8Encoding .UTF8.GetBytes(key);

            Byte [] toDecryptArray = Convert .FromBase64String(toDecrypt);

            System.Security.Cryptography. RijndaelManaged aes = new System.Security.Cryptography. RijndaelManaged ();

            aes.Key = keyArray;

            aes.Mode = System.Security.Cryptography. CipherMode .ECB;

            aes.Padding = System.Security.Cryptography. PaddingMode .PKCS7;

            System.Security.Cryptography. ICryptoTransform cTransform = aes.CreateDecryptor();

            Byte [] resultArray = cTransform.TransformFinalBlock(toDecryptArray, 0, toDecryptArray.Length);

            return System.Text. UTF8Encoding .UTF8.GetString(resultArray);

        }

    }

}

生成dll到untiy中,加密解密正常运行…

然后将加密类型修改为加密byte[]类型,代码如下:

using System;

namespace HiAES

{

    public class MyAES

    {     ///

        /// 32位密钥

        ///

        public static string key;

        ///

        /// 加密

        ///

        /// 需要被加密的数据

        ///

        public static byte [] Encrypt( byte [] toEncrypt)

        {

            Byte [] keyArray = System.Text. UTF8Encoding .UTF8.GetBytes(key);

            System.Security.Cryptography. RijndaelManaged aes = new System.Security.Cryptography. RijndaelManaged ();

            aes.Key = keyArray;

            aes.Mode = System.Security.Cryptography. CipherMode .ECB;

            aes.Padding = System.Security.Cryptography. PaddingMode .PKCS7;

            System.Security.Cryptography. ICryptoTransform cTransform = aes.CreateEncryptor();

            Byte [] resultArray = cTransform.TransformFinalBlock(toEncrypt, 0, toEncrypt.Length);

            return resultArray;

        }

        ///

        /// 加密

        ///

        /// 需要被加密的数据

        ///

        public static byte [] EncryptPassword( byte [] toEncrypt)

        {

            string keyForPassword = “qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq” ;

            Byte [] keyArray = System.Text. UTF8Encoding .UTF8.GetBytes(keyForPassword);

            System.Security.Cryptography. RijndaelManaged aes = new System.Security.Cryptography. RijndaelManaged ();

            aes.Key = keyArray;

            aes.Mode = System.Security.Cryptography. CipherMode .ECB;

            aes.Padding = System.Security.Cryptography. PaddingMode .PKCS7;

            System.Security.Cryptography. ICryptoTransform cTransform = aes.CreateEncryptor();

            Byte [] resultArray = cTransform.TransformFinalBlock(toEncrypt, 0, toEncrypt.Length);

            return resultArray;

        }

        ///

        /// 解密

        ///

        /// 需要被解密的数据

        ///

        public static byte [] Decrypt( byte [] toDecrypt)

        {

            Byte [] keyArray = System.Text. UTF8Encoding .UTF8.GetBytes(key);

            System.Security.Cryptography. RijndaelManaged aes = new System.Security.Cryptography. RijndaelManaged ();

            aes.Key = keyArray;

            aes.Mode = System.Security.Cryptography. CipherMode .ECB;

            aes.Padding = System.Security.Cryptography. PaddingMode .PKCS7;

            System.Security.Cryptography. ICryptoTransform cTransform = aes.CreateDecryptor();

            Byte [] resultArray = cTransform.TransformFinalBlock(toDecrypt, 0, toDecrypt.Length);

            return resultArray;

        }

    }

}

在unity3d中添加命名空间myaesencryption调用如下:

     void Start()

    {

        MyEncryption .key = “00000000000000000000000000ww00qq” ;

        string temp = “i am client” ;

        byte [] data = System.Text. Encoding .UTF8.GetBytes(temp);

        byte [] tempdata = MyEncryption .Encrypt(data); //加密

        byte [] tempdata2 = MyEncryption .Decrypt(tempdata); //解密

        Debug .Log(System.Text. Encoding .UTF8.GetString(tempdata2));

    }

加密解密过程运算正常…

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