/**
* we Generate a self signed certificate for the sake of testing - SHA224withECDSA
*/
private void createECCert(
string algorithm,
DerObjectIdentifier algOid)
{
FpCurve curve = new FpCurve(
new BigInteger("6864797660130609714981900799081393217269435300143305409394463459185543183397656052122559640661454554977296311391480858037121987999716643812574028291115057151"), // q (or p)
new BigInteger("01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC", 16), // a
new BigInteger("0051953EB9618E1C9A1F929A21A0B68540EEA2DA725B99B315F3B8B489918EF109E156193951EC7E937B1652C0BD3BB1BF073573DF883D2C34F1EF451FD46B503F00", 16)); // b
ECDomainParameters spec = new ECDomainParameters(
curve,
// curve.DecodePoint(Hex.Decode("02C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66")), // G
curve.DecodePoint(Hex.Decode("0200C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66")), // G
new BigInteger("01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5C9B8899C47AEBB6FB71E91386409", 16)); // n
ECPrivateKeyParameters privKey = new ECPrivateKeyParameters(
"ECDSA",
new BigInteger("5769183828869504557786041598510887460263120754767955773309066354712783118202294874205844512909370791582896372147797293913785865682804434049019366394746072023"), // d
spec);
ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
"ECDSA",
// curve.DecodePoint(Hex.Decode("026BFDD2C9278B63C92D6624F151C9D7A822CC75BD983B17D25D74C26740380022D3D8FAF304781E416175EADF4ED6E2B47142D2454A7AC7801DD803CF44A4D1F0AC")), // Q
curve.DecodePoint(Hex.Decode("02006BFDD2C9278B63C92D6624F151C9D7A822CC75BD983B17D25D74C26740380022D3D8FAF304781E416175EADF4ED6E2B47142D2454A7AC7801DD803CF44A4D1F0AC")), // Q
spec);
// //
// // set up the keys
// //
// AsymmetricKeyParameter privKey;
// AsymmetricKeyParameter pubKey;
//
// KeyFactory fact = KeyFactory.GetInstance("ECDSA");
//
// privKey = fact.generatePrivate(privKeySpec);
// pubKey = fact.generatePublic(pubKeySpec);
//
// distinguished name table.
//
IDictionary attrs = new Hashtable();
IList order = new ArrayList();
attrs.Add(X509Name.C, "AU");
attrs.Add(X509Name.O, "The Legion of the Bouncy Castle");
attrs.Add(X509Name.L, "Melbourne");
attrs.Add(X509Name.ST, "Victoria");
attrs.Add(X509Name.E, "*****@*****.**");
order.Add(X509Name.C);
order.Add(X509Name.O);
order.Add(X509Name.L);
order.Add(X509Name.ST);
order.Add(X509Name.E);
//
// create the certificate - version 3
//
X509V3CertificateGenerator certGen = new X509V3CertificateGenerator();
certGen.SetSerialNumber(BigInteger.One);
certGen.SetIssuerDN(new X509Name(order, attrs));
certGen.SetNotBefore(DateTime.UtcNow.AddSeconds(-50));
certGen.SetNotAfter(DateTime.UtcNow.AddSeconds(50));
certGen.SetSubjectDN(new X509Name(order, attrs));
certGen.SetPublicKey(pubKey);
certGen.SetSignatureAlgorithm(algorithm);
X509Certificate cert = certGen.Generate(privKey);
cert.CheckValidity(DateTime.UtcNow);
cert.Verify(pubKey);
X509CertificateParser fact = new X509CertificateParser();
cert = fact.ReadCertificate(cert.GetEncoded());
//
// try with point compression turned off
//
// ((ECPointEncoder)pubKey).setPointFormat("UNCOMPRESSED");
ECPoint q = pubKey.Q.Normalize();
pubKey = new ECPublicKeyParameters(
pubKey.AlgorithmName,
q.Curve.CreatePoint(q.XCoord.ToBigInteger(), q.YCoord.ToBigInteger()),
pubKey.Parameters);
certGen.SetPublicKey(pubKey);
cert = certGen.Generate(privKey);
cert.CheckValidity(DateTime.UtcNow);
cert.Verify(pubKey);
cert = fact.ReadCertificate(cert.GetEncoded());
if (!cert.SigAlgOid.Equals(algOid.ToString()))
{
Fail("ECDSA oid incorrect.");
}
if (cert.GetSigAlgParams() != null)
{
Fail("sig parameters present");
}
ISigner sig = SignerUtilities.GetSigner(algorithm);
sig.Init(false, pubKey);
byte[] b = cert.GetTbsCertificate();
sig.BlockUpdate(b, 0, b.Length);
if (!sig.VerifySignature(cert.GetSignature()))
{
Fail("EC certificate signature not mapped correctly.");
}
// Console.WriteLine(cert);
}
