NT_TRANSACT_SET_SECURITY_DESC

This command allows the client to change the security descriptor on a file.

Client Parameter Block Encoding
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Description
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USHORT Fid; FID of target
USHORT Reserved; MBZ
ULONG SecurityInformation; Fields of SD that to set
Data Block Encoding
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Description
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Data[TotalDataCount] Security Descriptor information

data is passed directly to NtSetSecurityObject(), with securityinformation describing which information to set. The transaction response contains no parameters or data.