/// <summary>
/// Verifies the digital signature.
/// </summary>
/// <remarks>
/// Verifies the digital signature.
/// </remarks>
/// <returns><c>true</c> if the signature is valid; otherwise <c>false</c>.</returns>
/// <exception cref="DigitalSignatureVerifyException">
/// An error verifying the signature has occurred.
/// </exception>
public bool Verify()
{
if (valid.HasValue)
{
return(valid.Value);
}
if (vex != null)
{
throw vex;
}
if (SignerCertificate == null)
{
var message = string.Format("Failed to verify digital signature: missing certificate.");
vex = new DigitalSignatureVerifyException(message);
throw vex;
}
try {
var certificate = ((SecureMimeDigitalCertificate)SignerCertificate).Certificate;
valid = SignerInfo.Verify(certificate);
return(valid.Value);
} catch (Exception ex) {
var message = string.Format("Failed to verify digital signature: {0}", ex.Message);
vex = new DigitalSignatureVerifyException(message, ex);
throw vex;
}
}