進口.NET公共XML密鑰在RSA

Question

的JavaScript我在XML創建在C＃ 格式是公鑰：

<Modulus>rYDd94biRAJ1P6j68xjARl......and so on</Modulus> 
<Exponent>A**B</Exponent> 

我想在JavaScript中創建這個密鑰，並用它加密的字符串， 我該怎麼辦？

感謝，

Answer 1

這麼多小時後研究，測試，放棄，再一次研究等，爲對.NET和Javascript RSA互操作性的解決方案，我發現這個庫：

http://www.jocys.com/Common/JsClasses/Documents/

它們的類具有與服務器上的RSACryptoServiceProvider相同的工作代碼。

你要做的：

1. 下載從SVN源代碼（用戶guest，密碼爲空）： https://jocys.com:8443/svn/Default/Projects/Jocys.com/WebSites/WebApp/Common/JsClasses/

2. 從重命名文件* .debug.js爲* .js文件。 （3）見以下文件列表。

3. 將所需的文件添加到您的html頁面

   <script type="text/javascript" src="js/System.js"></script> 
   <script type="text/javascript" src="js/System.IO.js"></script> 
   <script type="text/javascript" src="js/System.Text.js"></script> 
   <script type="text/javascript" src="js/System.Convert.js"></script> 
   <script type="text/javascript" src="js/System.BigInt.js"></script> 
   <script type="text/javascript" src="js/System.BitConverter.js"></script> 
   <script type="text/javascript" src="js/System.Security.Cryptography.js"></script> 
   <script type="text/javascript" src="js/System.Security.Cryptography.SHA1.js"></script> 
   <script type="text/javascript" src="js/System.Security.Cryptography.HMACSHA1.js"></script> 
   <script type="text/javascript" src="js/System.Security.Cryptography.RSA.js"></script> 
   

4. 添加這段JavaScript代碼到你的文本加密：對

   function RsaEncrypt() 
   { 
       //a public key generated from their sample. 
       //your should generate yours and stamp it here. 
       var xmlParams = 
       "<RSAKeyValue>" + 
        "<Modulus>pxtmFnrGI6Sb8ziyY+NRUDuQ4b/ETw5WabQ4daFQqzsCEr/6J/LLBU/2D5mO5/Wu5U/Rya1E55aYFZeaZMNqAw==</Modulus>" + 
        "<Exponent>AQAB</Exponent>" + 
        "<P>2TsVXWPEvDIJv/gd2rX9k0UOyXuaYgoAchIH6vUicis=</P>" + 
        "<Q>xO4+OYREQfqYRQK7y73+RaUG0IxobT0OQ0c+Ok2hc4k=</Q>" + 
        "<DP>K7/xgpiIU9rECeyfnp/OjS14V+3T3vDivBaTj6eFI3c=</DP>" + 
        "<DQ>K4N9ClZ4gp+tn6oP9t//XEIvtEsiE+kmyqTmUhmvMAk=</DQ>" + 
        "<InverseQ>p7o4BOlKZQZ693R1ViZ66y5gTjUkNNTd2za7/1YGBCs=</InverseQ>" + 
        "<D>XZqFVrYy4qhECruJgVZFp/GVuD5Y0gev88nVjl5r911QT+I8vgJSklTso7jTlpMtf2oe7UZ0WRWEtgPS3tZn4Q==</D>" + 
       "</RSAKeyValue>"; 
       var rsa = new System.Security.Cryptography.RSACryptoServiceProvider(); 
       rsa.FromXmlString(xmlParams); 
   
       // Encrypt 
       var decryptedBytes = System.Text.Encoding.UTF8.GetBytes(text); 
       var doOaepPadding = true; 
       var encryptedBytes = rsa.Encrypt(decryptedBytes, doOaepPadding); 
       var encryptedString = System.Convert.ToBase64String(encryptedBytes); 
       return encryptedString; 
   } 
   

查找文件（以上鍊接）如何生成私鑰和公鑰。代碼與您在服務器上手動編寫.NET相當。

您也可以檢查自己的測試頁：www.jocys.com/Common/JsClasses/Examples/System.Security.Cryptography.RSA.aspx

Answer 2

你也可以保存在PEM格式的公鑰C＃：

private static string ExportPublicKey(RSACryptoServiceProvider csp) 
    { 
     var parameters = csp.ExportParameters(false); 
     using (var stream = new MemoryStream()) 
     { 
      var writer = new BinaryWriter(stream); 
      writer.Write((byte)0x30); // SEQUENCE 
      using (var innerStream = new MemoryStream()) 
      { 
       var innerWriter = new BinaryWriter(innerStream); 
       EncodeIntegerBigEndian(innerWriter, new byte[] { 0x00 }); // Version 
       EncodeIntegerBigEndian(innerWriter, parameters.Modulus); 
       EncodeIntegerBigEndian(innerWriter, parameters.Exponent); 
       EncodeIntegerBigEndian(innerWriter, parameters.Exponent); // instead of parameters.D 
       EncodeIntegerBigEndian(innerWriter, parameters.Exponent); // instead of parameters.P 
       EncodeIntegerBigEndian(innerWriter, parameters.Exponent); // instead of parameters.Q 
       EncodeIntegerBigEndian(innerWriter, parameters.Exponent); // instead of parameters.DP 
       EncodeIntegerBigEndian(innerWriter, parameters.Exponent); // instead of parameters.DQ 
       EncodeIntegerBigEndian(innerWriter, parameters.Exponent); // instead of parameters.InverseQ 
       var length = (int)innerStream.Length; 
       EncodeLength(writer, length); 
       writer.Write(innerStream.GetBuffer(), 0, length); 
      } 

      char[] base64 = Convert.ToBase64String(stream.GetBuffer(), 0, (int)stream.Length).ToCharArray(); 
      StringBuilder res = new StringBuilder(); 
      res.AppendLine("-----BEGIN RSA PUBLIC KEY-----"); 
      for (int i = 0; i < base64.Length; i += 64) 
      { 
       int l = Math.Min(64, base64.Length - i); 
       for (int j = 0; j < l; j++) res.Append(base64[i + j]); 
       res.AppendLine(); 
      } 
      res.AppendLine("-----END RSA PUBLIC KEY-----"); 
      return res.ToString(); 
     } 
    } 

    private static void EncodeIntegerBigEndian(BinaryWriter stream, byte[] value, bool forceUnsigned = true) 
    { 
     stream.Write((byte)0x02); // INTEGER 
     var prefixZeros = 0; 
     for (var i = 0; i < value.Length; i++) 
     { 
      if (value[i] != 0) break; 
      prefixZeros++; 
     } 
     if (value.Length - prefixZeros == 0) 
     { 
      EncodeLength(stream, 1); 
      stream.Write((byte)0); 
     } 
     else 
     { 
      if (forceUnsigned && value[prefixZeros] > 0x7f) 
      { 
       // Add a prefix zero to force unsigned if the MSB is 1 
       EncodeLength(stream, value.Length - prefixZeros + 1); 
       stream.Write((byte)0); 
      } 
      else 
      { 
       EncodeLength(stream, value.Length - prefixZeros); 
      } 
      for (var i = prefixZeros; i < value.Length; i++) 
      { 
       stream.Write(value[i]); 
      } 
     } 
    } 

    private static void EncodeLength(BinaryWriter stream, int length) 
    { 
     if (length < 0) throw new ArgumentOutOfRangeException("length", "Length must be non-negative"); 
     if (length < 0x80) 
     { 
      // Short form 
      stream.Write((byte)length); 
     } 
     else 
     { 
      // Long form 
      var temp = length; 
      var bytesRequired = 0; 
      while (temp > 0) 
      { 
       temp >>= 8; 
       bytesRequired++; 
      } 
      stream.Write((byte)(bytesRequired | 0x80)); 
      for (var i = bytesRequired - 1; i >= 0; i--) 
      { 
       stream.Write((byte)(length >> (8 * i) & 0xff)); 
      } 
     } 
    }