CBFS Connect 2020 .NET Edition

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SetFileSecurity Event

Fires when the OS wants to change the Windows security attributes of a file or directory.

Syntax

public event OnSetFileSecurityHandler OnSetFileSecurity;

public delegate void OnSetFileSecurityHandler(object sender, CbfsSetFileSecurityEventArgs e);

public class CbfsSetFileSecurityEventArgs : EventArgs {
  public string FileName { get; }
  public int SecurityInformation { get; }
  public IntPtr SecurityDescriptor { get; }
  public int Length { get; }
  public long HandleInfo { get; }
  public IntPtr FileContext { get; set; }
  public IntPtr HandleContext { get; set; }
  public int ResultCode { get; set; }
}
Public Event OnSetFileSecurity As OnSetFileSecurityHandler

Public Delegate Sub OnSetFileSecurityHandler(sender As Object, e As CbfsSetFileSecurityEventArgs)

Public Class CbfsSetFileSecurityEventArgs Inherits EventArgs
  Public ReadOnly Property FileName As String
  Public ReadOnly Property SecurityInformation As Integer
  Public ReadOnly Property SecurityDescriptor As IntPtr
  Public ReadOnly Property Length As Integer
  Public ReadOnly Property HandleInfo As Long
  Public Property FileContext As IntPtr
  Public Property HandleContext As IntPtr
  Public Property ResultCode As Integer
End Class

Remarks

This event fires when the OS wants to change the Windows security attributes of the file or directory specified by FileName.

This event only needs to be handled if the UseWindowsSecurity property is enabled. To handle this event properly, applications must update the pieces of security information, specified by SecurityInformation, on the specified file or directory in their backend storage. Please refer to the parameter descriptions below, as well as the Security Checks topic, for more information.

The SecurityInformation parameter indicates which pieces of security information must be set. This value is a bitfield; possible flags include (but are not limited to):

  • OWNER_SECURITY_INFORMATION
  • GROUP_SECURITY_INFORMATION
  • DACL_SECURITY_INFORMATION
  • SACL_SECURITY_INFORMATION
Please refer to Microsoft's SECURITY_INFORMATION data type documentation for more information about possible values.

The SecurityDescriptor parameter points to a memory buffer that contains data indicated by SecurityInformation. This data is formatted as a SECURITY_DESCRIPTOR structure in self-relative format. Please refer to those articles for more information about self-relative security descriptors.

The Length parameter specifies the length, in bytes, of SecurityDescriptor.

Please refer to the Buffer Parameters topic for more information on how to work with memory buffer event parameters.

The HandleInfo parameter carries a handle to an object with information about the file handle. While within the event handler, it can be used to call any of the following methods: GetHandleCreatorProcessId, GetHandleCreatorProcessName, GetHandleCreatorThreadId, or GetHandleCreatorToken.

The FileContext and HandleContext parameters are placeholders for application-defined data associated with the file and specific handle, respectively. Please refer to the Contexts topic for more information.

The ResultCode parameter will always be 0 when the event is fired. If the event cannot be handled in a "successful" manner for some reason (e.g., a resource isn't available, security checks failed, etc.), set it to a non-zero value to report an appropriate error. Please refer to the Error Reporting and Handling topic for more information.

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CBFS Connect 2020 .NET Edition - Version 20.0 [Build 8348]