ECDiffieHellmanCng从Byte []获取ECDiffieHellmanPublicKey [英] ECDiffieHellmanCng Get ECDiffieHellmanPublicKey from Byte[]

问题描述

我正在为我的服务器实现DiffieHellman密钥交换，但是在我收到转换为 Byte [] 的另一方公钥后，无法将其转换回 ECDiffieHellmanPublicKey 在 DeriveKeyMaterial中使用它

代码：

  var socket = state.Socket; 
 var buffer = state.Buffer; 
 var alice = new ECDiffieHellmanCng 
 {
 KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash，
 HashAlgorithm = CngAlgorithm.Sha256 
}; 
 var exchangePacket = new ExchangeMes​​sage（144，（int）PacketType.Exchange）
 {
 PublicKey = alice.PublicKey.ToByteArray（）
}; 
 var len1 = socket.Send（exchangePacket，0，exchangePacket.Length，SocketFlags.None）; 
 if（0> = len1）{
 return false; 
} 
 var len2 = socket.Receive（buffer，buffer.Length，SocketFlags.None）; 
 if（len2< = 0）
 return false; 
 Array.Resize（ref buffer，len2）; 
 var bob = new ExchangeMes​​sage（buffer）; //如何获取ECDiffieHellmanPublicKey FROM MY BYTE [] 
 byte [] aliceKey = alice.DeriveKeyMaterial（/ *无法从byte [] * /）获取ECDiffieHellmanPublicKey; 

这是我如何工作 p>



  DeriveKeyMaterial（ECDiffieHellmanCngPublicKey.FromByteArray（bob.PublicKey，new CngKeyBlobFormat（ECCPUBLICBLOB）））; 
  




I am implementing DiffieHellman key exchange for my server but after i receive the other party public key which is converted to Byte[] i can't convert it back to ECDiffieHellmanPublicKey to use it in the DeriveKeyMaterial

Here is my code:

var socket = state.Socket;
var buffer = state.Buffer;
var alice = new ECDiffieHellmanCng
{
    KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash,
    HashAlgorithm = CngAlgorithm.Sha256
};
var exchangePacket = new ExchangeMessage(144, (int)PacketType.Exchange)
{
    PublicKey = alice.PublicKey.ToByteArray()
};
var len1 = socket.Send(exchangePacket, 0, exchangePacket.Length, SocketFlags.None);
if (0 >= len1) {
    return false;
}
var len2 = socket.Receive(buffer, buffer.Length, SocketFlags.None);
if (len2 <= 0)
    return false;
Array.Resize(ref buffer, len2);
var bob = new ExchangeMessage(buffer); //HOW TO GET ECDiffieHellmanPublicKey FROM MY BYTE[]
byte[] aliceKey = alice.DeriveKeyMaterial(/*Can't get ECDiffieHellmanPublicKey from byte[]*/);

解决方案

Will this is how i got it to work

DeriveKeyMaterial(ECDiffieHellmanCngPublicKey.FromByteArray(bob.PublicKey, new CngKeyBlobFormat("ECCPUBLICBLOB")));

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