} // End Sub ExportKeyPair
// https://stackoverflow.com/questions/22008337/generating-keypair-using-bouncy-castle
// https://stackoverflow.com/questions/14052485/converting-a-public-key-in-subjectpublickeyinfo-format-to-rsapublickey-format-ja
// https://stackoverflow.com/questions/10963756/get-der-encoded-public-key
// http://www.programcreek.com/java-api-examples/index.php?api=org.bouncycastle.crypto.util.SubjectPublicKeyInfoFactory
public static void CerKeyInfo(Org.BouncyCastle.Crypto.AsymmetricCipherKeyPair keyPair)
{
Org.BouncyCastle.Asn1.Pkcs.PrivateKeyInfo pkInfo = Org.BouncyCastle.Pkcs.PrivateKeyInfoFactory.CreatePrivateKeyInfo(keyPair.Private);
string privateKey = System.Convert.ToBase64String(pkInfo.GetDerEncoded());
// and following for public:
Org.BouncyCastle.Asn1.X509.SubjectPublicKeyInfo info = Org.BouncyCastle.X509.SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(keyPair.Public);
string publicKey = System.Convert.ToBase64String(info.GetDerEncoded());
System.Console.WriteLine(privateKey);
System.Console.WriteLine(publicKey);
} // End Sub CerKeyInfo
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));
}