internal static DsaPublicKeyParameters BouncyCastleFromKey(DsaPublicKey key)
{
return(new DsaPublicKeyParameters(key.Y.ToBouncyBigInteger(),
new DsaParameters(
key.P.ToBouncyBigInteger(),
key.Q.ToBouncyBigInteger(),
key.G.ToBouncyBigInteger())));
}
/// <summary>
/// Imports the X509 certificate.
/// </summary>
/// <param name="purpose">The purpose.</param>
/// <param name="input">The input.</param>
/// <returns></returns>
public virtual ImportedKeySet X509Certificate(KeyPurpose purpose, Stream input)
{
var parser = new X509CertificateParser();
var cert = parser.ReadCertificate(input);
var bouncyKey = cert.GetPublicKey();
Key key;
if (bouncyKey is RsaKeyParameters)
{
var keyParam = bouncyKey as RsaKeyParameters;
key = new RsaPublicKey
{
Modulus = keyParam.Modulus.ToSystemBigInteger(),
PublicExponent = keyParam.Exponent.ToSystemBigInteger(),
Size = keyParam.Modulus.BitLength,
};
}
else if (bouncyKey is DsaPublicKeyParameters)
{
var keyParam = bouncyKey as DsaPublicKeyParameters;
if (KeyPurpose.Encrypt == purpose)
{
throw new InvalidKeySetException("DSA key cannot be used for encryption!");
}
key = new DsaPublicKey
{
Y = keyParam.Y.ToSystemBigInteger(),
G = keyParam.Parameters.G.ToSystemBigInteger(),
P = keyParam.Parameters.P.ToSystemBigInteger(),
Q = keyParam.Parameters.Q.ToSystemBigInteger(),
Size = keyParam.Parameters.P.BitLength
};
}
else
{
throw new InvalidKeySetException("Unsupported key type!");
}
return(new ImportedKeySet(key, purpose, "imported from certificate"));
}
