/// <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>
/// Remove leading zeros from all RSA parameters.
/// </summary>
public static RsaParams Canonicalize(this RsaParams parameters)
{
return(new RsaParams {
N = KeyEx.RemoveLeadingZeros(parameters.N),
E = KeyEx.RemoveLeadingZeros(parameters.E),
D = KeyEx.RemoveLeadingZeros(parameters.D),
DP = KeyEx.RemoveLeadingZeros(parameters.DP),
DQ = KeyEx.RemoveLeadingZeros(parameters.DQ),
QI = KeyEx.RemoveLeadingZeros(parameters.QI),
P = KeyEx.RemoveLeadingZeros(parameters.P),
Q = KeyEx.RemoveLeadingZeros(parameters.Q),
T = parameters.T
});
}