如何在C＃中实现三重DES（完整示例） [英] How to implement Triple DES in C# (complete example)

问题描述

我想在C＃中使用三重DES在（utf8）字符串中加密/解密（utf8）的任何长度的密钥。

我正在寻找这些三个函数

  public static string Encrypt（string data，string key）
 {
 ... 
} 
 
 public static string Decrypt（string data，string key）
 {
 ... 
} 
 
 public static string GenerateKeyFromString（string str）
 {
 ... 
} 
  

注意：在任何人链接之前， http：// www.geekzilla.co.uk/view7B360BD8-A77C-4F1F-BCA0-ACD0F6795F61.htm 实现不起作用，我已经彻底测试了。

我已经做了大量的搜索，发现问题的一些问题，如 EncryptOneBlock 等等，但我正在寻找一个完整的假人实现，我认为这对其他人也是有用的。

提前感谢

解决方案

= http://www.codeproject.com/Articles/14150/Encrypt-and-Decrypt-Data-with-C> http://www.codeproject.com/Articles/14150/Encrypt-and-Decrypt-Data -with-C

加密：

  public static string Encrypt（string toEncrypt，bool useHashing）
 {
 byte [] keyArray; 
 byte [] toEncryptArray = UTF8Encoding.UTF8.GetBytes（toEncrypt）; 
 
 System.Configuration.AppSettingsReader settingsReader = 
 new AppSettingsReader（）; 
 //从配置文件获取密钥
 
 string key =（string）settingsReader.GetValue（SecurityKey，
 typeof（String））; 
 //System.Windows.Forms.MessageBox.Show(key）; 
 //如果哈希使用get哈希码对您的密钥
 if（useHashing）
 {
 MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider（）; 
 keyArray = hashmd5.ComputeHash（UTF8Encoding.UTF8.GetBytes（key））; 
 //始终释放加密服务提供的资源并刷新数据
 //。最佳实践
 
 hashmd5.Clear（）; 
} 
 else 
 keyArray = UTF8Encoding.UTF8.GetBytes（key）; 
 
 TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider（）; 
 //设置tripleDES算法的秘密密钥
 tdes.Key = keyArray; 
 //操作模式。还有其他4种模式。 
 //我们选择ECB（电子代码簿）
 tdes.Mode = CipherMode.ECB; 
 //填充模式（如果添加任何额外的字节）
 
 tdes.Padding = PaddingMode.PKCS7; 
 
 ICryptoTransform cTransform = tdes.CreateEncryptor（）; 
 //将字节数组的指定区域转换为resultArray 
 byte [] resultArray = 
 cTransform.TransformFinalBlock（toEncryptArray，0，
 toEncryptArray.Length）; 
 //发布TripleDes Encryptor保存的资源
 tdes.Clear（）; 
 //将加密的数据返回到不可读的字符串格式
 return Convert.ToBase64String（resultArray，0，resultArray.Length）; 
} 
  

解密：

  public static string Decrypt（string cipherString，bool useHashing）
 {
 byte [] keyArray; 
 //获取字符串的字节码
 
 byte [] toEncryptArray = Convert.FromBase64String（cipherString）; 
 
 System.Configuration.AppSettingsReader settingsReader = 
 new AppSettingsReader（）; 
 //从配置文件获取密钥以打开锁定！ 
 string key =（string）settingsReader.GetValue（SecurityKey，
 typeof（String））; 
 
 if（useHashing）
 {
 //如果使用散列，就可以获得关于密钥的哈希码
 MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider（）; 
 keyArray = hashmd5.ComputeHash（UTF8Encoding.UTF8.GetBytes（key））; 
 //释放由MD5CryptoServiceProvider持有的任何资源
 
 hashmd5.Clear（）; 
} 
 else 
 {
 //如果哈希没有被实现获得密钥的字节码
 keyArray = UTF8Encoding.UTF8.GetBytes（key）; 
} 
 
 TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider（）; 
 //设置tripleDES算法的秘密密钥
 tdes.Key = keyArray; 
 //操作模式。还有其他4种模式。 
 //我们选择ECB（电子代码簿）
 
 tdes.Mode = CipherMode.ECB; 
 //填充模式（如果添加任何额外的字节）
 tdes.Padding = PaddingMode.PKCS7; 
 
 ICryptoTransform cTransform = tdes.CreateDecryptor（）; 
 byte [] resultArray = cTransform.TransformFinalBlock（
 toEncryptArray，0，toEncryptArray.Length）; 
 //发布TripleDes Encryptor保存的资源
 tdes.Clear（）; 
 //返回清除解密的TEXT 
返回UTF8Encoding.UTF8.GetString（resultArray）; 
} 
  

I want to use triple DES in C# for encryption/decryption of (utf8) strings with a (utf8) key of any length.

I am looking for these three functions

public static string Encrypt(string data, string key)
{
    ...
}

public static string Decrypt(string data, string key)
{
    ...
}

public static string GenerateKeyFromString(string str)
{
    ...
}

Note: Before anyone links to it, the http://www.geekzilla.co.uk/view7B360BD8-A77C-4F1F-BCA0-ACD0F6795F61.htm implementation does not work, I have thoroughly tested it.

I have done lots of searching and found bits of the problem like EncryptOneBlock and others but I am looking for a complete 'for dummies' implementation which I think would be useful for others too.

Thanks in advance!

解决方案

Complete source here: http://www.codeproject.com/Articles/14150/Encrypt-and-Decrypt-Data-with-C

Encrypt:

public static string Encrypt(string toEncrypt, bool useHashing)
{
    byte[] keyArray;
    byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);

    System.Configuration.AppSettingsReader settingsReader = 
                                        new AppSettingsReader();
    // Get the key from config file

    string key = (string)settingsReader.GetValue("SecurityKey", 
                                                     typeof(String));
    //System.Windows.Forms.MessageBox.Show(key);
    //If hashing use get hashcode regards to your key
    if (useHashing)
    {
        MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
        keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
        //Always release the resources and flush data
        // of the Cryptographic service provide. Best Practice

        hashmd5.Clear();
    }
    else
        keyArray = UTF8Encoding.UTF8.GetBytes(key);

    TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
    //set the secret key for the tripleDES algorithm
    tdes.Key = keyArray;
    //mode of operation. there are other 4 modes.
    //We choose ECB(Electronic code Book)
    tdes.Mode = CipherMode.ECB;
    //padding mode(if any extra byte added)

    tdes.Padding = PaddingMode.PKCS7;

    ICryptoTransform cTransform = tdes.CreateEncryptor();
    //transform the specified region of bytes array to resultArray
    byte[] resultArray = 
      cTransform.TransformFinalBlock(toEncryptArray, 0, 
      toEncryptArray.Length);
    //Release resources held by TripleDes Encryptor
    tdes.Clear();
    //Return the encrypted data into unreadable string format
    return Convert.ToBase64String(resultArray, 0, resultArray.Length);
}

Decrypt:

public static string Decrypt(string cipherString, bool useHashing)
{
    byte[] keyArray;
    //get the byte code of the string

    byte[] toEncryptArray = Convert.FromBase64String(cipherString);

    System.Configuration.AppSettingsReader settingsReader = 
                                        new AppSettingsReader();
    //Get your key from config file to open the lock!
    string key = (string)settingsReader.GetValue("SecurityKey", 
                                                 typeof(String));

    if (useHashing)
    {
        //if hashing was used get the hash code with regards to your key
        MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
        keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
        //release any resource held by the MD5CryptoServiceProvider

        hashmd5.Clear();
    }
    else
    {
        //if hashing was not implemented get the byte code of the key
        keyArray = UTF8Encoding.UTF8.GetBytes(key);
    }

    TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
    //set the secret key for the tripleDES algorithm
    tdes.Key = keyArray;
    //mode of operation. there are other 4 modes. 
    //We choose ECB(Electronic code Book)

    tdes.Mode = CipherMode.ECB;
    //padding mode(if any extra byte added)
    tdes.Padding = PaddingMode.PKCS7;

    ICryptoTransform cTransform = tdes.CreateDecryptor();
    byte[] resultArray = cTransform.TransformFinalBlock(
                         toEncryptArray, 0, toEncryptArray.Length);
    //Release resources held by TripleDes Encryptor                
    tdes.Clear();
    //return the Clear decrypted TEXT
    return UTF8Encoding.UTF8.GetString(resultArray);
}

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