The MakeSelfRelativeSD function creates a security descriptor in self-relative format by using a security descriptor in absolute format as a template.
BOOL MakeSelfRelativeSD(
PSECURITY_DESCRIPTOR pAbsoluteSecurityDescriptor, |
// address of absolute SD |
PSECURITY_DESCRIPTOR pSelfRelativeSecurityDescriptor, |
// address self-relative SD |
LPDWORD lpdwBufferLength |
// address of SD size |
); |
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
A security descriptor in absolute format contains pointers to the information it contains, rather than containing the information itself. A security descriptor in self-relative format contains the information in a contiguous block of memory. In a self-relative security descriptor, a SECURITY_DESCRIPTOR structure always starts the information, but the security descriptor’s other components can follow the structure in any order. Instead of using memory addresses, the components of the security descriptor are identified by offsets from the beginning of the security descriptor. This format is useful when an security descriptor must be stored on a floppy disk or transmitted by means of a communications protocol.
A server that copies secured objects to various media can use the MakeSelfRelativeSD function to create a self-relative security descriptor from an absolute security descriptor and the MakeAbsoluteSD function to create an absolute security descriptor from a self-relative security descriptor.
MakeAbsoluteSD, SECURITY_DESCRIPTOR
file: /Techref/os/win/api/win32/func/src/f56_14.htm, 3KB, , updated: 2000/4/7 12:19, local time: 2024/8/26 05:48,
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