CopySid function (securitybaseapi.h)

Article
10/13/2021

The CopySid function copies a security identifier (SID) to a buffer.

Syntax

BOOL CopySid(
  [in]  DWORD nDestinationSidLength,
  [out] PSID  pDestinationSid,
  [in]  PSID  pSourceSid
);

Parameters

[in] nDestinationSidLength

Specifies the length, in bytes, of the buffer receiving the copy of the SID.

[out] pDestinationSid

A pointer to a buffer that receives a copy of the source SID structure.

[in] pSourceSid

A pointer to a SID structure that the function copies to the buffer pointed to by the pDestinationSid parameter.

Return value

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.

Remarks

An application can use the CopySid function to make a copy of a SID in an access token (for example, in a TOKEN_GROUPS structure) to use in an access control entry (ACE).

Examples

For an example that uses this function, see Getting the Logon SID.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps \| UWP apps]
Minimum supported server	Windows Server 2003 [desktop apps \| UWP apps]
Target Platform	Windows
Header	securitybaseapi.h (include Windows.h)
Library	Advapi32.lib
DLL	Advapi32.dll

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