private void button2_Click(object sender, EventArgs ea) { ECGost3410Signer signer = new ECGost3410Signer(); ECPublicKeyParameters pubKey = new ECPublicKeyParameters( "ECGOST3410", new FpPoint(curve, new FpFieldElement(mod_p, TextBoxToBigInteger16(tbValPublicX)), // x new FpFieldElement(mod_p, TextBoxToBigInteger16(tbValPublicY))), // y parameters); BigInteger H = TextBoxToBigInteger16(tbH); BigInteger rs = TextBoxToBigInteger16(tbrs); BigInteger ss = TextBoxToBigInteger16(tbss); BigInteger q = parameters.N; //FpPoint G = (FpPoint)parameters.G; //FpPoint Q = new FpPoint(curve, new FpFieldElement(mod_p, TextBoxToBigInteger16(tbValPublicX)), new FpFieldElement(mod_p, TextBoxToBigInteger16(tbValPublicY))); BigInteger e = H.Mod(q); byte[] ee = e.ToByteArray(); byte[] message = H.ToByteArray(); Array.Reverse(message); signer.Init(false, pubKey); MessageBox.Show(signer.VerifySignature(message, rs, ss).ToString(), "Проверка подписи"); //FpPoint C = (FpPoint)(G.Multiply(e.ModInverse(q).Multiply(ss).Mod(q)).Subtract(Q.Multiply(e.ModInverse(q).Multiply(rs).Mod(q)))); //BigInteger x = C.X.ToBigInteger(); }
/// <summary> /// Verifies a signature to be authentic /// </summary> /// <param name="originalSignature">The signature which is be verified</param> /// <param name="publicKey">the public key used for the verification</param> /// <param name="data">the data which is signed</param> /// <returns>true if signature is authentic, false if not</returns> public bool Verify(byte[] originalSignature, byte[] publicKey, byte[] data) { ECPublicKeyParameters pubKey = null; try { pubKey = (ECPublicKeyParameters)CreateAsymmetricKeyParameterFromPublicKeyInfo(publicKey); } catch (InvalidCastException exception) { string message = "Public Key Import Failed!\n" + $"{exception.Message}.\n" + "The contents of the source do not represent a valid EC key parameter\n" + "Verify that the key is not corrupted.\n" + "- or - Verify that the correct key is selected."; throw new CryptoException(message, exception); } var signer = new ECGost3410Signer(); signer.Init(false, pubKey); var r = new byte[originalSignature.Length / 2]; var s = new byte[originalSignature.Length / 2]; Array.Copy(originalSignature, r, r.Length); Array.Copy(originalSignature, r.Length, s, 0, s.Length); var R = new BigInteger(1, r); var S = new BigInteger(1, s); return(signer.VerifySignature(data, R, S)); }
/** * Test Sign and Verify with test parameters * see: http://www.ietf.org/internet-drafts/draft-popov-cryptopro-cpalgs-01.txt * gostR3410-2001-TestParamSet P.46 */ private void ecGOST3410_TestParam() { SecureRandom random = new SecureRandom(); BigInteger mod_p = new BigInteger("57896044618658097711785492504343953926634992332820282019728792003956564821041"); //p BigInteger mod_q = new BigInteger("57896044618658097711785492504343953927082934583725450622380973592137631069619"); FpCurve curve = new FpCurve( mod_p, // p new BigInteger("7"), // a new BigInteger("43308876546767276905765904595650931995942111794451039583252968842033849580414"), // b mod_q, BigInteger.One); ECDomainParameters parameters = new ECDomainParameters( curve, curve.CreatePoint( new BigInteger("2"), // x new BigInteger("4018974056539037503335449422937059775635739389905545080690979365213431566280")), // y mod_q); ECKeyPairGenerator pGen = new ECKeyPairGenerator(); ECKeyGenerationParameters genParam = new ECKeyGenerationParameters( parameters, random); pGen.Init(genParam); AsymmetricCipherKeyPair pair = pGen.GenerateKeyPair(); ParametersWithRandom param = new ParametersWithRandom(pair.Private, random); ECGost3410Signer ecgost3410 = new ECGost3410Signer(); ecgost3410.Init(true, param); //get hash message using the digest GOST3411. byte[] message = Encoding.ASCII.GetBytes("Message for sign"); Gost3411Digest gost3411 = new Gost3411Digest(); gost3411.BlockUpdate(message, 0, message.Length); byte[] hashmessage = new byte[gost3411.GetDigestSize()]; gost3411.DoFinal(hashmessage, 0); BigInteger[] sig = ecgost3410.GenerateSignature(hashmessage); ecgost3410.Init(false, pair.Public); if (!ecgost3410.VerifySignature(hashmessage, sig[0], sig[1])) { Fail("signature fails"); } }
/** * Test Sign and Verify with C parameters * see: http://www.ietf.org/internet-drafts/draft-popov-cryptopro-cpalgs-01.txt * gostR3410-2001-CryptoPro-C-ParamSet P.48 */ private void ecGOST3410_CParam() { SecureRandom random = new SecureRandom(); BigInteger mod_p = new BigInteger("70390085352083305199547718019018437841079516630045180471284346843705633502619"); //p BigInteger mod_q = new BigInteger("70390085352083305199547718019018437840920882647164081035322601458352298396601"); FpCurve curve = new FpCurve( mod_p, // p new BigInteger("70390085352083305199547718019018437841079516630045180471284346843705633502616"), // a new BigInteger("32858"), // b mod_q, BigInteger.One); ECDomainParameters parameters = new ECDomainParameters( curve, curve.CreatePoint( new BigInteger("0"), // x new BigInteger("29818893917731240733471273240314769927240550812383695689146495261604565990247")), // y mod_q); ECKeyPairGenerator pGen = new ECKeyPairGenerator("ECGOST3410"); ECKeyGenerationParameters genParam = new ECKeyGenerationParameters( parameters, random); pGen.Init(genParam); AsymmetricCipherKeyPair pair = pGen.GenerateKeyPair(); ParametersWithRandom param = new ParametersWithRandom(pair.Private, random); ECGost3410Signer ecgost3410 = new ECGost3410Signer(); ecgost3410.Init(true, param); BigInteger[] sig = ecgost3410.GenerateSignature(hashmessage); ecgost3410.Init(false, pair.Public); if (!ecgost3410.VerifySignature(hashmessage, sig[0], sig[1])) { Fail("signature fails"); } }
/** * Test Sign and Verify with B parameters * see: http://www.ietf.org/internet-drafts/draft-popov-cryptopro-cpalgs-01.txt * gostR3410-2001-CryptoPro-B-ParamSet P.47-48 */ private void ecGOST3410_BParam() { SecureRandom random = new SecureRandom(); BigInteger mod_p = new BigInteger("57896044618658097711785492504343953926634992332820282019728792003956564823193"); //p BigInteger mod_q = new BigInteger("57896044618658097711785492504343953927102133160255826820068844496087732066703"); FpCurve curve = new FpCurve( mod_p, // p new BigInteger("57896044618658097711785492504343953926634992332820282019728792003956564823190"), // a new BigInteger("28091019353058090096996979000309560759124368558014865957655842872397301267595"), // b mod_q, BigInteger.One); ECDomainParameters parameters = new ECDomainParameters( curve, curve.CreatePoint( new BigInteger("1"), // x new BigInteger("28792665814854611296992347458380284135028636778229113005756334730996303888124")), // y mod_q); ECKeyPairGenerator pGen = new ECKeyPairGenerator("ECGOST3410"); ECKeyGenerationParameters genParam = new ECKeyGenerationParameters( parameters, random); pGen.Init(genParam); AsymmetricCipherKeyPair pair = pGen.GenerateKeyPair(); ParametersWithRandom param = new ParametersWithRandom(pair.Private, random); ECGost3410Signer ecgost3410 = new ECGost3410Signer(); ecgost3410.Init(true, param); BigInteger[] sig = ecgost3410.GenerateSignature(hashmessage); ecgost3410.Init(false, pair.Public); if (!ecgost3410.VerifySignature(hashmessage, sig[0], sig[1])) { Fail("signature fails"); } }
/** * Test Sign and Verify with A parameters * see: http://www.ietf.org/internet-drafts/draft-popov-cryptopro-cpalgs-01.txt * gostR3410-2001-CryptoPro-A-ParamSet P.47 */ public void ecGOST3410_AParam() { SecureRandom random = new SecureRandom(); BigInteger mod_p = new BigInteger("115792089237316195423570985008687907853269984665640564039457584007913129639319"); //p BigInteger mod_q = new BigInteger("115792089237316195423570985008687907853073762908499243225378155805079068850323"); FpCurve curve = new FpCurve( mod_p, // p new BigInteger("115792089237316195423570985008687907853269984665640564039457584007913129639316"), // a new BigInteger("166"), // b mod_q, BigInteger.One); ECDomainParameters parameters = new ECDomainParameters( curve, curve.CreatePoint( new BigInteger("1"), // x new BigInteger("64033881142927202683649881450433473985931760268884941288852745803908878638612")), // y mod_q); ECKeyPairGenerator pGen = new ECKeyPairGenerator("ECGOST3410"); ECKeyGenerationParameters genParam = new ECKeyGenerationParameters( parameters, random); pGen.Init(genParam); AsymmetricCipherKeyPair pair = pGen.GenerateKeyPair(); ParametersWithRandom param = new ParametersWithRandom(pair.Private, random); ECGost3410Signer ecgost3410 = new ECGost3410Signer(); ecgost3410.Init(true, param); BigInteger[] sig = ecgost3410.GenerateSignature(hashmessage); ecgost3410.Init(false, pair.Public); if (!ecgost3410.VerifySignature(hashmessage, sig[0], sig[1])) { Fail("signature fails"); } }
private bool VerifyGost(byte[] buffer, int length, byte[] signature) { ECDomainParameters dParams = ECGost3410NamedCurves.GetByOid(CryptoProObjectIdentifiers.GostR3410x2001CryptoProA); byte[] reversedPublicKey = PublicKey.Reverse().ToArray(); ECPoint q = dParams.Curve.CreatePoint(new BigInteger(1, reversedPublicKey, 32, 32), new BigInteger(1, reversedPublicKey, 0, 32), false); ECPublicKeyParameters parameters = new ECPublicKeyParameters(q, dParams); var signer = new ECGost3410Signer(); signer.Init(false, parameters); var digest = new Gost3411Digest(); digest.BlockUpdate(buffer, 0, length); byte[] hash = new byte[digest.GetDigestSize()]; digest.DoFinal(hash, 0); return(signer.VerifySignature(hash, new BigInteger(1, signature, 32, 32), new BigInteger(1, signature, 0, 32))); }
private void ecGOST3410_TEST() { BigInteger mod_p = new BigInteger("57896044618658097711785492504343953926634992332820282019728792003956564821041"); //p BigInteger mod_q = new BigInteger("57896044618658097711785492504343953927082934583725450622380973592137631069619"); FpCurve curve = new FpCurve( mod_p, // p new BigInteger("7"), // a new BigInteger("43308876546767276905765904595650931995942111794451039583252968842033849580414"), // b mod_q, BigInteger.One); ECDomainParameters parameters = new ECDomainParameters( curve, curve.CreatePoint( new BigInteger("2"), // x new BigInteger("4018974056539037503335449422937059775635739389905545080690979365213431566280")), // y mod_q); ECPrivateKeyParameters priKey = new ECPrivateKeyParameters( "ECGOST3410", new BigInteger("55441196065363246126355624130324183196576709222340016572108097750006097525544"), // d parameters); ParametersWithRandom param = new ParametersWithRandom(priKey, k); ECGost3410Signer ecgost3410 = new ECGost3410Signer(); ecgost3410.Init(true, param); byte[] mVal = new BigInteger("20798893674476452017134061561508270130637142515379653289952617252661468872421").ToByteArray(); byte[] message = new byte[mVal.Length]; for (int i = 0; i != mVal.Length; i++) { message[i] = mVal[mVal.Length - 1 - i]; } BigInteger[] sig = ecgost3410.GenerateSignature(message); if (!r.Equals(sig[0])) { Fail("r component wrong.", r, sig[0]); } if (!s.Equals(sig[1])) { Fail("s component wrong.", s, sig[1]); } // Verify the signature ECPublicKeyParameters pubKey = new ECPublicKeyParameters( "ECGOST3410", curve.CreatePoint( new BigInteger("57520216126176808443631405023338071176630104906313632182896741342206604859403"), // x new BigInteger("17614944419213781543809391949654080031942662045363639260709847859438286763994")), // y parameters); ecgost3410.Init(false, pubKey); if (!ecgost3410.VerifySignature(message, sig[0], sig[1])) { Fail("verification fails"); } }
private void button2_Click(object sender, EventArgs ea) { FpPoint G = (FpPoint)parameters.G; FpPoint Q = new FpPoint(curve, new FpFieldElement(mod_p, TextBoxToBigInteger16(tbValPublicX)), new FpFieldElement(mod_p, TextBoxToBigInteger16(tbValPublicY))); FpPoint C = new FpPoint(curve, new FpFieldElement(mod_p, TextBoxToBigInteger16(tbCX)), new FpFieldElement(mod_p, TextBoxToBigInteger16(tbCY))); BigInteger mu = TextBoxToBigInteger16(tbVoterMu); BigInteger epsilon = TextBoxToBigInteger16(tbVoterEpsilon); BigInteger delta = TextBoxToBigInteger16(tbVoterDelta); BigInteger tau = TextBoxToBigInteger16(tbVoterTau); BigInteger q = parameters.N; FpPoint Cs = (FpPoint)G.Multiply(epsilon).Add(Q.Multiply(mu)).Add(C.Multiply(delta.ModInverse(q))); tbCsX.Text = Cs.X.ToBigInteger().ToString(16); tbCsY.Text = Cs.Y.ToBigInteger().ToString(16); BigInteger H = TextBoxToBigInteger16(tbH); //BigInteger q = parameters.N; //BigInteger mu = TextBoxToBigInteger16(tbVoterMu); //BigInteger delta = TextBoxToBigInteger16(tbVoterDelta); //BigInteger tau = TextBoxToBigInteger16(tbVoterTau); BigInteger csx = TextBoxToBigInteger16(tbCsX); BigInteger rs = csx.Mod(q); BigInteger es = H.Mod(q); BigInteger r = (tau.Multiply(delta).Multiply(rs.Add(mu.Multiply(es)))).Mod(q); BigInteger e = (es.Multiply(tau)).Mod(q); tbrs.Text = rs.ToString(16); tbr.Text = r.ToString(16); tbes.Text = es.ToString(16); tbe.Text = e.ToString(16); BigInteger k = TextBoxToBigInteger16(tbk); //BigInteger e = TextBoxToBigInteger16(tbe); BigInteger d = TextBoxToBigInteger16(tbValPrivate); //BigInteger r = TextBoxToBigInteger16(tbr); //BigInteger q = parameters.N; BigInteger s = (k.Multiply(e).Add(d.Multiply(r))).Mod(q); tbs.Text = s.ToString(16); BigInteger ss = (s.Multiply(delta.ModInverse(q)).Multiply(tau.ModInverse(q)).Mod(q).Add(epsilon.Multiply(es).Mod(q))).Mod(q); tbss.Text = ss.ToString(16); ECGost3410Signer signer = new ECGost3410Signer(); ECPublicKeyParameters pubKey = new ECPublicKeyParameters( "ECGOST3410", new FpPoint(curve, new FpFieldElement(mod_p, TextBoxToBigInteger16(tbValPublicX)), // x new FpFieldElement(mod_p, TextBoxToBigInteger16(tbValPublicY))), // y parameters); //BigInteger H = TextBoxToBigInteger16(tbH); //BigInteger rs = TextBoxToBigInteger16(tbrs); //BigInteger ss = TextBoxToBigInteger16(tbss); //BigInteger q = parameters.N; //FpPoint G = (FpPoint)parameters.G; //FpPoint Q = new FpPoint(curve, new FpFieldElement(mod_p, TextBoxToBigInteger16(tbValPublicX)), new FpFieldElement(mod_p, TextBoxToBigInteger16(tbValPublicY))); //BigInteger e = H.Mod(q); byte[] ee = e.ToByteArray(); byte[] message = H.ToByteArray(); Array.Reverse(message); signer.Init(false, pubKey); MessageBox.Show(signer.VerifySignature(message, rs, ss).ToString(), "Проверка подписи"); //FpPoint C = (FpPoint)(G.Multiply(e.ModInverse(q).Multiply(ss).Mod(q)).Subtract(Q.Multiply(e.ModInverse(q).Multiply(rs).Mod(q)))); //BigInteger x = C.X.ToBigInteger(); }