Inheritance: ICipherParameters
Ejemplo n.º 1
0
		private bool isProcessingOkay(
			RsaKeyParameters    pub,
			RsaKeyParameters    prv,
			byte[]              data,
			SecureRandom        random)
		{
			RsaBlindingFactorGenerator blindFactorGen = new RsaBlindingFactorGenerator();
			RsaBlindingEngine blindingEngine = new RsaBlindingEngine();
			PssSigner blindSigner = new PssSigner(blindingEngine, new Sha1Digest(), 20);
			PssSigner pssEng = new PssSigner(new RsaEngine(), new Sha1Digest(), 20);

			random.NextBytes(data);

			blindFactorGen.Init(pub);

			BigInteger blindFactor = blindFactorGen.GenerateBlindingFactor();
			RsaBlindingParameters parameters = new RsaBlindingParameters(pub, blindFactor);

			// generate a blind signature
			blindSigner.Init(true, new ParametersWithRandom(parameters, random));

			blindSigner.BlockUpdate(data, 0, data.Length);

			byte[] blindedData = blindSigner.GenerateSignature();

			RsaEngine signerEngine = new RsaEngine();

			signerEngine.Init(true, prv);

			byte[] blindedSig = signerEngine.ProcessBlock(blindedData, 0, blindedData.Length);

			// unblind the signature
			blindingEngine.Init(false, parameters);

			byte[] s = blindingEngine.ProcessBlock(blindedSig, 0, blindedSig.Length);

			//verify signature with PssSigner
			pssEng.Init(false, pub);
			pssEng.BlockUpdate(data, 0, data.Length);

			return pssEng.VerifySignature(s);
		}
Ejemplo n.º 2
0
		private void testSig(
			int                 id,
			RsaKeyParameters    pub,
			RsaKeyParameters    prv,
			byte[]              slt,
			byte[]              msg,
			byte[]              sig)
		{
			RsaBlindingFactorGenerator blindFactorGen = new RsaBlindingFactorGenerator();
			RsaBlindingEngine blindingEngine = new RsaBlindingEngine();
			PssSigner blindSigner = new PssSigner(blindingEngine, new Sha1Digest(), 20);
			PssSigner signer = new PssSigner(new RsaEngine(), new Sha1Digest(), 20);

			blindFactorGen.Init(pub);

			BigInteger blindFactor = blindFactorGen.GenerateBlindingFactor();
			RsaBlindingParameters parameters = new RsaBlindingParameters(pub, blindFactor);

			// generate a blind signature
			blindSigner.Init(true, new ParametersWithRandom(parameters, new FixedRandom(slt)));

			blindSigner.BlockUpdate(msg, 0, msg.Length);

			byte[] blindedData = blindSigner.GenerateSignature();

			RsaEngine signerEngine = new RsaEngine();

			signerEngine.Init(true, prv);

			byte[] blindedSig = signerEngine.ProcessBlock(blindedData, 0, blindedData.Length);

			// unblind the signature
			blindingEngine.Init(false, parameters);

			byte[] s = blindingEngine.ProcessBlock(blindedSig, 0, blindedSig.Length);

			//signature verification
			if (!AreEqual(s, sig))
			{
				Fail("test " + id + " failed generation");
			}
	        
			//verify signature with PssSigner
			signer.Init(false, pub);
			signer.BlockUpdate(msg, 0, msg.Length);

			if (!signer.VerifySignature(s))
			{
        		Fail("test " + id + " failed PssSigner verification");
			}
		}