使用充氣城堡

Question

實施電子商務表決系統，我的工作基礎上Foo92協議的E投票系統。我是Bouncy Castle圖書館的新手。但是我必須說明這個基於盲簽名和RSA算法的系統。這個計劃（FOO92）有一個圖表，我已經爲你上傳了。我想知道如何盲目簽署並在Bouncy Castle圖書館進行驗證。請幫我解決我的問題。 謝謝大家。

請注意*運算符是致盲運算符。和/運營商是unblinding運營商。

Answer 1

最後，我已經寫了充氣城堡守則FOO92電子投票協議。 下面是類：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using Org.BouncyCastle; 
using Org.BouncyCastle.Math; 
using Org.BouncyCastle.OpenSsl; 
using Org.BouncyCastle.Crypto.Generators; 
using Org.BouncyCastle.Crypto; 
using Org.BouncyCastle.Security; 
using Org.BouncyCastle.Crypto.Engines; 
using Org.BouncyCastle.Crypto.Parameters; 
using Org.BouncyCastle.Crypto.Signers; 
using Org.BouncyCastle.Crypto.Digests; 
using System.Windows.Forms; 

namespace FooTest 
{ 
    class FooImplementing 
    { 
     private RsaBlindingEngine rsaBlindingEngine = new RsaBlindingEngine(); 
     private RsaBlindingFactorGenerator blindingFactorGenerator = new RsaBlindingFactorGenerator(); 
     private RsaBlindingParameters blindingParameteres; 
     private RsaKeyPairGenerator aliceRsaKeyGenerator = new RsaKeyPairGenerator(); 
     private AsymmetricCipherKeyPair aliceKeyPair; 
     private RsaKeyPairGenerator bobRsaKeyGenerator = new RsaKeyPairGenerator(); 
     private AsymmetricCipherKeyPair bobKeyPair; 
     private byte[] inputMessage; 
     public FooImplementing(string message) 
     { 
      inputMessage = getBytes(message); 
      aliceRsaKeyGenerator.Init(new KeyGenerationParameters(new SecureRandom(), 1024)); 
      aliceKeyPair = aliceRsaKeyGenerator.GenerateKeyPair(); 
      //****************************************************************************** 
      bobRsaKeyGenerator.Init(new KeyGenerationParameters(new SecureRandom(), 1024)); 
      bobKeyPair = bobRsaKeyGenerator.GenerateKeyPair(); 
      //****************************************************************************** 
      blindingFactorGenerator.Init(bobKeyPair.Public); 
      blindingParameteres = new RsaBlindingParameters((RsaKeyParameters)bobKeyPair.Public, blindingFactorGenerator.GenerateBlindingFactor()); 
     } 

     public byte[] getBytes(string input) 
     { 
      byte[] bytes = new byte[input.Length * sizeof(char)]; 
      System.Buffer.BlockCopy(input.ToCharArray(), 0, bytes, 0, bytes.Length); 
      return bytes; 
     } 

     public string GetString(byte[] bytes) 
     { 
      char[] chars = new char[bytes.Length/sizeof(char)]; 
      System.Buffer.BlockCopy(bytes, 0, chars, 0, bytes.Length); 
      return new string(chars); 
     } 

     public byte[] blindTheMessage(TextBox t1) 
     { 
      for (int i = 0; i < inputMessage.Length; i++) 
      { 
       t1.Text += inputMessage[i].ToString(); 
      } 
      PssSigner messageBlinder = new PssSigner(rsaBlindingEngine, new Sha1Digest(), 15); 
      messageBlinder.Init(true, blindingParameteres); 
      messageBlinder.BlockUpdate(inputMessage, 0, inputMessage.Length); 
      byte[] blindedMessage = messageBlinder.GenerateSignature(); 
      return blindedMessage; 
     } 

     public byte[] blindSignature(byte[] input) 
     { 
      RsaEngine rsaEngine = new RsaEngine(); 
      rsaEngine.Init(true, bobKeyPair.Private); 
      byte[] blindSignedMessage = rsaEngine.ProcessBlock(input, 0, input.Length); 
      return blindSignedMessage; 
     } 

     public byte[] unblindeTheSignedData(byte[] input) 
     { 
      rsaBlindingEngine.Init(false, blindingParameteres); 
      byte[] messageForSending = rsaBlindingEngine.ProcessBlock(input, 0, input.Length); 
      return messageForSending; 
     } 

     public bool verifyBlindSignature(byte[] input, TextBox t1) 
     {    
      PssSigner verifier = new PssSigner(new RsaEngine(), new Sha1Digest(), 15); 
      verifier.Init(false, bobKeyPair.Public); 
      verifier.BlockUpdate(inputMessage, 0, inputMessage.Length); 
      for (int i = 0; i < inputMessage.Length; i++) 
      { 
       t1.Text += inputMessage[i].ToString(); 
      } 
      return verifier.VerifySignature(input); 
     } 

     public byte[] signedWithRsa(byte[] input) 
     { 
      ISigner signer = SignerUtilities.GetSigner("SHA1withRSA"); 
      signer.Init(true, aliceKeyPair.Private); 
      signer.BlockUpdate(input, 0, input.Length); 
      byte[] signedData = signer.GenerateSignature(); 
      return signedData; 
     } 

     public bool verifyRsaSignedData(byte[] input, byte[] signature) 
     { 
      ISigner verifier = SignerUtilities.GetSigner("SHA1withRSA"); 
      verifier.Init(false, aliceKeyPair.Public); 
      verifier.BlockUpdate(input, 0, input.Length); 
      return verifier.VerifySignature(signature); 
     } 

    } 
} 

這裏是運行FOO協議的步驟。當然它沒有一些步驟，諸如ID發送，但它的功能是作爲真正爲Foo協議

FooImplementing foo = new FooImplementing("Behzad"); 
var blindedMessage = foo.blindTheMessage(textBox2); 
var userSignature = foo.signedWithRsa(blindedMessage); 
if (foo.verifyRsaSignedData(blindedMessage, userSignature)) 
{ 
    var signedMessage = foo.blindSignature(blindedMessage); 
    var unblindedMessage = foo.unblindeTheSignedData(signedMessage); 
    MessageBox.Show(foo.verifyBlindSignature(unblindedMessage, textBox3).ToString()); 
} 

通知，文本框是收集結果，不是我的計劃的一部分。 謝謝大家。