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RegGetKeySecurity info  Overview  Group

The RegGetKeySecurity function retrieves a copy of the security descriptor protecting the specified open registry key.

LONG RegGetKeySecurity(

    HKEY hKey,

// open handle of key to set

    SECURITY_INFORMATION SecurityInformation,

// descriptor contents

    PSECURITY_DESCRIPTOR pSecurityDescriptor,

// address of descriptor for key

    LPDWORD lpcbSecurityDescriptor 

// address of size of buffer and descriptor

   );

Parameters

hKey
Identifies an open key for which to retrieve the security descriptor.
SecurityInformation
Specifies a SECURITY_INFORMATION value that indicates the requested security information.
pSecurityDescriptor
Points to a buffer that receives a copy of the requested security descriptor.
lpcbSecurityDescriptor
Points to a variable that specifies the size, in bytes, of the buffer pointed to by the pSecurityDescriptor parameter. When the function returns, the variable contains the number of bytes written to the buffer.

Return Values

If the function succeeds, the return value is ERROR_SUCCESS.

If the function fails, the return value is a nonzero error code defined in WINERROR.H. You can use the FormatMessage function with the FORMAT_MESSAGE_FROM_SYSTEM flag to get a generic description of the error.

Remarks

If the buffer specified by the pSecurityDescriptor parameter is too small, the function returns ERROR_INSUFFICIENT_BUFFER and the lpcbSecurityDescriptor parameter contains the number of bytes required for the requested security descriptor.

To read the owner, group, or DACL from the key’s security descriptor, the calling process must have been granted READ_CONTROL access when the handle was opened. To get READ_CONTROL access, the caller must be the owner of the key or the key's DACL must grant the access.

To read the SACL from the security descriptor, the calling process must have been granted ACCESS_SYSTEM_SECURITY access when the key was opened. The proper way to get this access is to enable the SE_SECURITY_NAME privilege in the caller's current token, open the handle for ACCESS_SYSTEM_SECURITY access, and then disable the privilege.

See Also

RegDeleteKey, RegOpenKeyEx, RegSetKeySecurity, SECURITY_INFORMATION

See also:


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