PSECURITY_DESCRIPTOR_HEADER
OpbCreateCacheEntry(
      PSECURITY_DESCRIPTOR InputSecurityDescriptor,
      ULONG FullHash,
      UCHAR SmallHash
  );

Routine Description:

    Allocates and initializes a new cache entry.

Arguments:

    InputSecurityDescriptor - The security descriptor to be cached.

    FullHash - Full 32 bit hash of the security descriptor.

    SmallHash - Index into the cache table.

Return Value:

    A pointer to the newly allocated cache entry, or NULL