/// <summary>
/// Creates a new <c>VssSigningCredentials</c> instance using the specified <paramref name="factory"/>
/// callback function to retrieve the signing key.
/// </summary>
/// <param name="factory">The factory which creates <c>RSA</c> keys used for signing and verification</param>
/// <returns>A new <c>VssSigningCredentials</c> instance which uses the specified provider for signing</returns>
public static VssSigningCredentials Create(Func <RSA> factory)
{
ArgumentUtility.CheckForNull(factory, nameof(factory));
using (var rsa = factory())
{
if (rsa == null)
{
throw new InvalidCredentialsException(JwtResources.SignatureAlgorithmUnsupportedException("None"));
}
if (rsa.KeySize < c_minKeySize)
{
throw new InvalidCredentialsException(JwtResources.SigningTokenKeyTooSmall());
}
return(new RSASigningToken(factory, rsa.KeySize));
}
}
/// <summary>
/// Creates a new <c>VssSigningCredentials</c> instance using the specified <paramref name="certificate"/> instance
/// as the signing key.
/// </summary>
/// <param name="certificate">The certificate which contains the key used for signing and verification</param>
/// <returns>A new <c>VssSigningCredentials</c> instance which uses the specified certificate for signing</returns>
public static VssSigningCredentials Create(X509Certificate2 certificate)
{
ArgumentUtility.CheckForNull(certificate, nameof(certificate));
if (certificate.HasPrivateKey)
{
var rsa = certificate.GetRSAPrivateKey();
if (rsa == null)
{
throw new SignatureAlgorithmUnsupportedException(certificate.SignatureAlgorithm.FriendlyName);
}
if (rsa.KeySize < c_minKeySize)
{
throw new InvalidCredentialsException(JwtResources.SigningTokenKeyTooSmall());
}
}
return(new X509Certificate2SigningToken(certificate));
}