def self.make_absolute_sd(security_descriptor)
security_descriptor = security_descriptor.pointer if security_descriptor.respond_to?(:pointer)
absolute_sd_size = FFI::Buffer.new(:long).write_long(0)
dacl_size = FFI::Buffer.new(:long).write_long(0)
sacl_size = FFI::Buffer.new(:long).write_long(0)
owner_size = FFI::Buffer.new(:long).write_long(0)
group_size = FFI::Buffer.new(:long).write_long(0)
if MakeAbsoluteSD(security_descriptor, nil, absolute_sd_size, nil, dacl_size, nil, sacl_size, nil, owner_size, nil, group_size)
raise "Expected ERROR_INSUFFICIENT_BUFFER from MakeAbsoluteSD, and got no error!"
elsif Chef::ReservedNames::Win32::Error.get_last_error != ERROR_INSUFFICIENT_BUFFER
Chef::ReservedNames::Win32::Error.raise!
end
absolute_sd = FFI::MemoryPointer.new absolute_sd_size.read_long
owner = FFI::MemoryPointer.new owner_size.read_long
group = FFI::MemoryPointer.new group_size.read_long
dacl = FFI::MemoryPointer.new dacl_size.read_long
sacl = FFI::MemoryPointer.new sacl_size.read_long
unless MakeAbsoluteSD(security_descriptor, absolute_sd, absolute_sd_size, dacl, dacl_size, sacl, sacl_size, owner, owner_size, group, group_size)
Chef::ReservedNames::Win32::Error.raise!
end
[ SecurityDescriptor.new(absolute_sd), SID.new(owner), SID.new(group), ACL.new(dacl), ACL.new(sacl) ]
end