/// <summary>
/// Queries the security package's expections regarding message/token/signature/padding buffer sizes.
/// </summary>
/// <returns></returns>
private CSecPkgContext_Sizes QueryBufferSizes()
{
CSecPkgContext_Sizes sizes = new CSecPkgContext_Sizes();
CSecurityStatus status = CSecurityStatus.InternalError;
bool gotRef = false;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
this.ContextHandle.DangerousAddRef(ref gotRef);
}
catch (Exception)
{
if (gotRef)
{
this.ContextHandle.DangerousRelease();
gotRef = false;
}
throw;
}
finally
{
if (gotRef)
{
status = CContextNativeMethods.QueryContextAttributes_Sizes(
ref this.ContextHandle.rawHandle,
CContextQueryAttrib.Sizes,
ref sizes
);
this.ContextHandle.DangerousRelease();
}
}
if (status != CSecurityStatus.OK)
{
throw new CSSPIException("Failed to query context buffer size attributes", status);
}
return(sizes);
}
internal static extern CSecurityStatus QueryContextAttributes_Sizes(
ref CRawSspiHandle contextHandle,
CContextQueryAttrib attrib,
ref CSecPkgContext_Sizes sizes
);
