/// <summary>
/// Setup the size of the buffer Windows provides for an LSA_REFERENCED_DOMAIN_LIST
/// </summary>
internal static void InitializeReferencedDomainsPointer(SafeLsaMemoryHandle referencedDomains)
{
Debug.Assert(referencedDomains != null, "referencedDomains != null");
// We don't know the real size of the referenced domains yet, so we need to set an initial
// size based on the LSA_REFERENCED_DOMAIN_LIST structure, then resize it to include all of
// the domains.
referencedDomains.Initialize((uint)Marshal.SizeOf <Interop.LSA_REFERENCED_DOMAIN_LIST>());
Interop.LSA_REFERENCED_DOMAIN_LIST domainList = referencedDomains.Read <Interop.LSA_REFERENCED_DOMAIN_LIST>(0);
unsafe
{
byte *pRdl = null;
try
{
referencedDomains.AcquirePointer(ref pRdl);
// If there is a trust information list, then the buffer size is the end of that list minus
// the beginning of the domain list. Otherwise, then the buffer is just the size of the
// referenced domain list structure, which is what we defaulted to.
if (domainList.Domains != IntPtr.Zero)
{
Interop.LSA_TRUST_INFORMATION *pTrustInformation = (Interop.LSA_TRUST_INFORMATION *)domainList.Domains;
pTrustInformation = pTrustInformation + domainList.Entries;
long bufferSize = (byte *)pTrustInformation - pRdl;
Debug.Assert(bufferSize > 0, "bufferSize > 0");
referencedDomains.Initialize((ulong)bufferSize);
}
}
finally
{
if (pRdl != null)
{
referencedDomains.ReleasePointer();
}
}
}
}