/// <summary>
/// Converts a WebKey of type RSA or RSAHSM to a RSA parameter object
/// </summary>
/// <param name="parameters"></param>
/// <param name="includePrivateParameters">Tells if private material
/// must be included.</param>
/// <returns>An RSA parameter</returns>
public static RSAParameters ToRSAParameters(this RsaParams parameters,
bool includePrivateParameters = true)
{
KeyEx.VerifyNonZero(parameters.N);
KeyEx.VerifyNonZero(parameters.E);
if (!includePrivateParameters)
{
return(new RSAParameters {
Modulus = KeyEx.RemoveLeadingZeros(parameters.N),
Exponent = KeyEx.ForceLength(parameters.E, 4)
});
}
var num = KeyEx.RemoveLeadingZeros(parameters.N).Length * 8;
return(new RSAParameters {
Modulus = KeyEx.RemoveLeadingZeros(parameters.N),
Exponent = KeyEx.ForceLength(parameters.E, 4),
D = KeyEx.ForceLength(parameters.D, num / 8),
DP = KeyEx.ForceLength(parameters.DP, num / 16),
DQ = KeyEx.ForceLength(parameters.DQ, num / 16),
InverseQ = KeyEx.ForceLength(parameters.QI, num / 16),
P = KeyEx.ForceLength(parameters.P, num / 16),
Q = KeyEx.ForceLength(parameters.Q, num / 16)
});
}
/// <summary>
/// Converts a WebKey of type EC or EC-HSM to an EC parameter object.
/// </summary>
/// <param name="ecParameters"></param>
/// <param name="includePrivateParameters">private material must be
/// included.</param>
/// <returns>An EC parameter object</returns>
public static ECParameters ToECParameters(this EccParams ecParameters,
bool includePrivateParameters = true)
{
KeyEx.VerifyNonZero(ecParameters.X);
KeyEx.VerifyNonZero(ecParameters.Y);
var keyParameterSize = ecParameters.Curve.GetKeyParameterSize();
if (includePrivateParameters && ecParameters.D != null)
{
KeyEx.VerifyNonZero(ecParameters.D);
ecParameters.D = KeyEx.ForceLength(ecParameters.D, keyParameterSize);
}
return(new ECParameters {
Curve = ecParameters.Curve.ToECCurve(),
D = ecParameters.D,
Q = new ECPoint {
X = KeyEx.ForceLength(ecParameters.X, keyParameterSize),
Y = KeyEx.ForceLength(ecParameters.Y, keyParameterSize)
}
});
}