} // End Function VerifySignature
// https://stackoverflow.com/questions/18244630/elliptic-curve-with-digital-signature-algorithm-ecdsa-implementation-on-bouncy
public static Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair GenerateEcdsaKeyPair()
{
Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator gen =
new Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator();
Org.BouncyCastle.Security.SecureRandom secureRandom =
new Org.BouncyCastle.Security.SecureRandom();
// https://github.com/bcgit/bc-csharp/blob/master/crypto/src/asn1/sec/SECNamedCurves.cs#LC1096
Org.BouncyCastle.Asn1.X9.X9ECParameters ps =
Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256k1");
Org.BouncyCastle.Crypto.Parameters.ECDomainParameters ecParams =
new Org.BouncyCastle.Crypto.Parameters.ECDomainParameters(ps.Curve, ps.G, ps.N, ps.H);
Org.BouncyCastle.Crypto.Parameters.ECKeyGenerationParameters keyGenParam =
new Org.BouncyCastle.Crypto.Parameters.ECKeyGenerationParameters(ecParams, secureRandom);
gen.Init(keyGenParam);
Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair kp = gen.GenerateKeyPair();
// Org.BouncyCastle.Crypto.Parameters.ECPrivateKeyParameters priv =
// (Org.BouncyCastle.Crypto.Parameters.ECPrivateKeyParameters)kp.Private;
return(kp);
} // End Function GenerateEcdsaKeyPair
GenerateGost3410KeyPair(Org.BouncyCastle.Security.SecureRandom random, int keystrength)
{
Org.BouncyCastle.Crypto.Parameters.ECDomainParameters gostEcDomainParameters =
Org.BouncyCastle.Asn1.CryptoPro.ECGost3410NamedCurves.GetByOid(
Org.BouncyCastle.Asn1.CryptoPro.CryptoProObjectIdentifiers.GostR3410x2001CryptoProA);
Org.BouncyCastle.Crypto.IAsymmetricCipherKeyPairGenerator gostKeyGen = new Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator();
Org.BouncyCastle.Crypto.KeyGenerationParameters genParam = new Org.BouncyCastle.Crypto.Parameters.ECKeyGenerationParameters(gostEcDomainParameters, random);
gostKeyGen.Init(genParam);
Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair kp = gostKeyGen.GenerateKeyPair();
return(kp);
}
public static System.Security.Cryptography.ECDsa GetMsEcdsaProvider()
{
string namedCurve = "prime256v1";
Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator pGen =
new Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator();
Org.BouncyCastle.Crypto.Parameters.ECKeyGenerationParameters genParam =
new Org.BouncyCastle.Crypto.Parameters.ECKeyGenerationParameters(
Org.BouncyCastle.Asn1.X9.X962NamedCurves.GetOid(namedCurve),
new Org.BouncyCastle.Security.SecureRandom()
);
pGen.Init(genParam);
Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair keyPair = pGen.GenerateKeyPair();
Org.BouncyCastle.Crypto.Parameters.ECPublicKeyParameters pub =
(Org.BouncyCastle.Crypto.Parameters.ECPublicKeyParameters)keyPair.Public;
Org.BouncyCastle.Crypto.Parameters.ECPrivateKeyParameters priv =
(Org.BouncyCastle.Crypto.Parameters.ECPrivateKeyParameters)keyPair.Private;
System.Security.Cryptography.ECParameters pars = new ECParameters();
//string str = priv.Parameters.Curve.ToString();
//System.Console.WriteLine(str);
//pars.Curve = new ECCurve();
//pars.D = priv.D.ToByteArray();
//pars.Q = new System.Security.Cryptography.ECPoint();
//pars.Q.X = pub.Q.X.GetEncoded();
//pars.Q.Y = pub.Q.Y.GetEncoded();
//System.Security.Cryptography.ECDsa.Create(pars);
// The CngKey can be created by importing the key using the Der encoded bytes:
Org.BouncyCastle.Asn1.Pkcs.PrivateKeyInfo bcKeyInfo =
Org.BouncyCastle.Pkcs.PrivateKeyInfoFactory.CreatePrivateKeyInfo(keyPair.Private)
;
byte[] pkcs8Blob = bcKeyInfo.GetDerEncoded();
CngKey importedKey = CngKey.Import(pkcs8Blob, CngKeyBlobFormat.Pkcs8PrivateBlob);
return(new System.Security.Cryptography.ECDsaCng(importedKey));
}
public void CompareSecp256k1KeyGenerationRuntimes()
{
int num_runs = 100;
long openecc_time_sum = 0L;
long bc_time_sum = 0L;
for (int i = 0; i < num_runs; i++)
{
///
/// OpenECC
///
var openecc_curve = CurveFactory.secp256k1;
var openecc_keygen_timer = Stopwatch.StartNew();
var openecc_encoder = new ProbabilisticWeierstrassMessageEncoder(openecc_curve, new BigInteger(7));
var openecc_encryptor = new ElGamalEncryptor(openecc_curve, openecc_encoder);
var openecc_keys = openecc_encryptor.GenerateKeyPair();
openecc_keygen_timer.Stop();
openecc_time_sum += openecc_keygen_timer.Elapsed.Milliseconds;
}
for (int i = 0; i < num_runs; i++)
{
///
///Bouncy Castle
///
var bc_stuff = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256k1");
var bc_keygen_timer = Stopwatch.StartNew();
var bc_keygen = new Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator();
var bc_domain_params = new Org.BouncyCastle.Crypto.Parameters.ECDomainParameters(bc_stuff.Curve, bc_stuff.G, bc_stuff.N);
var bc_random = new Org.BouncyCastle.Security.SecureRandom();
var bc_keygen_params = new Org.BouncyCastle.Crypto.Parameters.ECKeyGenerationParameters(bc_domain_params, bc_random);
bc_keygen.Init(bc_keygen_params);
var bc_keys = bc_keygen.GenerateKeyPair();
bc_keygen_timer.Stop();
bc_time_sum += bc_keygen_timer.Elapsed.Milliseconds;
}
throw new NotImplementedException("BC: " + (bc_time_sum/(double)num_runs) + "; OpenECC: " + (openecc_time_sum/(double)num_runs));
//RuntimeAssert.LessThan(bc_time_sum / (double)num_runs, openecc_time_sum / (double)num_runs);
}
} // End Function GenerateDHKeyPair
public static Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair GenerateEcKeyPair(
Org.BouncyCastle.Asn1.X9.X9ECParameters ecParam
, Org.BouncyCastle.Security.SecureRandom secureRandom
)
{
Org.BouncyCastle.Crypto.Parameters.ECDomainParameters ecDomain =
new Org.BouncyCastle.Crypto.Parameters.ECDomainParameters(ecParam.Curve, ecParam.G, ecParam.N);
Org.BouncyCastle.Crypto.Parameters.ECKeyGenerationParameters keygenParam =
new Org.BouncyCastle.Crypto.Parameters.ECKeyGenerationParameters(ecDomain, secureRandom);
Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator keyGenerator =
new Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator();
keyGenerator.Init(keygenParam);
return(keyGenerator.GenerateKeyPair());
} // End Function GenerateEcKeyPair
} // End Function GenerateEcKeyPair
public static Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair GenerateGostKeyPair(string curveName, Org.BouncyCastle.Security.SecureRandom random)
{
Org.BouncyCastle.Asn1.X9.X9ECParameters ecParam = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName(curveName);
if (ecParam == null)
{
ecParam = Org.BouncyCastle.Crypto.EC.CustomNamedCurves.GetByName(curveName);
}
Org.BouncyCastle.Crypto.Parameters.ECDomainParameters parameters = new Org.BouncyCastle.Crypto.Parameters.ECDomainParameters(ecParam);
Org.BouncyCastle.Crypto.Parameters.ECKeyGenerationParameters keyGenerationParameters = new Org.BouncyCastle.Crypto.Parameters.ECKeyGenerationParameters(parameters, random);
Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator keygenerator = new Org.BouncyCastle.Crypto.Generators.ECKeyPairGenerator("ECGOST3410");
keygenerator.Init(keyGenerationParameters);
Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair pair = keygenerator.GenerateKeyPair();
// Org.BouncyCastle.Crypto.Parameters.ECPrivateKeyParameters validatorPrivate = (Org.BouncyCastle.Crypto.Parameters.ECPrivateKeyParameters)pair.Private;
// Org.BouncyCastle.Crypto.Parameters.ECPublicKeyParameters validatorPublic = (Org.BouncyCastle.Crypto.Parameters.ECPublicKeyParameters)pair.Public;
return(pair);
} // End Function GenerateGostKeyPair
