private SafeHGlobalBuffer CreateAbsoluteSecurityDescriptor()
{
SafeStructureInOutBuffer <SecurityDescriptorStructure> sd_buffer = null;
try
{
byte[] dacl = Dacl?.ToByteArray();
byte[] sacl = Sacl?.ToByteArray();
byte[] owner = Owner?.Sid.ToArray();
byte[] group = Group?.Sid.ToArray();
int total_size = GetLength(dacl) + GetLength(sacl) + GetLength(owner) + GetLength(group);
sd_buffer = new SafeStructureInOutBuffer <SecurityDescriptorStructure>(total_size, true);
NtRtl.RtlCreateSecurityDescriptor(sd_buffer, Revision).ToNtException();
SecurityDescriptorControl control = Control & SecurityDescriptorControl.ValidControlSetMask;
NtRtl.RtlSetControlSecurityDescriptor(sd_buffer, control, control).ToNtException();
int current_ofs = 0;
if (Dacl != null)
{
IntPtr ptr = UpdateBuffer(sd_buffer, Dacl.NullAcl ? null : dacl, ref current_ofs);
NtRtl.RtlSetDaclSecurityDescriptor(sd_buffer, true, ptr, Dacl.Defaulted).ToNtException();
}
if (Sacl != null)
{
IntPtr ptr = UpdateBuffer(sd_buffer, Sacl.NullAcl ? null : sacl, ref current_ofs);
NtRtl.RtlSetSaclSecurityDescriptor(sd_buffer, true, ptr, Sacl.Defaulted).ToNtException();
}
if (Owner != null)
{
IntPtr ptr = UpdateBuffer(sd_buffer, owner, ref current_ofs);
NtRtl.RtlSetOwnerSecurityDescriptor(sd_buffer, ptr, Owner.Defaulted);
}
if (Group != null)
{
IntPtr ptr = UpdateBuffer(sd_buffer, group, ref current_ofs);
NtRtl.RtlSetGroupSecurityDescriptor(sd_buffer, ptr, Group.Defaulted);
}
return(Interlocked.Exchange(ref sd_buffer, null));
}
finally
{
sd_buffer?.Close();
}
}
/// <summary>
/// Convert security descriptor to a byte array
/// </summary>
/// <returns>The binary security descriptor</returns>
public byte[] ToByteArray()
{
SafeStructureInOutBuffer <SecurityDescriptorStructure> sd_buffer = null;
SafeHGlobalBuffer dacl_buffer = null;
SafeHGlobalBuffer sacl_buffer = null;
SafeSidBufferHandle owner_buffer = null;
SafeSidBufferHandle group_buffer = null;
try
{
sd_buffer = new SafeStructureInOutBuffer <SecurityDescriptorStructure>();
NtRtl.RtlCreateSecurityDescriptor(sd_buffer, Revision).ToNtException();
SecurityDescriptorControl control = Control & SecurityDescriptorControl.ValidControlSetMask;
NtRtl.RtlSetControlSecurityDescriptor(sd_buffer, control, control).ToNtException();
if (Dacl != null)
{
if (!Dacl.NullAcl)
{
dacl_buffer = new SafeHGlobalBuffer(Dacl.ToByteArray());
}
else
{
dacl_buffer = new SafeHGlobalBuffer(IntPtr.Zero, 0, false);
}
NtRtl.RtlSetDaclSecurityDescriptor(sd_buffer, true, dacl_buffer.DangerousGetHandle(), Dacl.Defaulted).ToNtException();
}
if (Sacl != null)
{
if (!Sacl.NullAcl)
{
sacl_buffer = new SafeHGlobalBuffer(Sacl.ToByteArray());
}
else
{
sacl_buffer = new SafeHGlobalBuffer(IntPtr.Zero, 0, false);
}
NtRtl.RtlSetSaclSecurityDescriptor(sd_buffer, true, sacl_buffer.DangerousGetHandle(), Sacl.Defaulted).ToNtException();
}
if (Owner != null)
{
owner_buffer = Owner.Sid.ToSafeBuffer();
NtRtl.RtlSetOwnerSecurityDescriptor(sd_buffer, owner_buffer.DangerousGetHandle(), Owner.Defaulted);
}
if (Group != null)
{
group_buffer = Group.Sid.ToSafeBuffer();
NtRtl.RtlSetGroupSecurityDescriptor(sd_buffer, group_buffer.DangerousGetHandle(), Group.Defaulted);
}
int total_length = 0;
NtStatus status = NtRtl.RtlAbsoluteToSelfRelativeSD(sd_buffer, new SafeHGlobalBuffer(IntPtr.Zero, 0, false), ref total_length);
if (status != NtStatus.STATUS_BUFFER_TOO_SMALL)
{
status.ToNtException();
}
using (SafeHGlobalBuffer relative_sd = new SafeHGlobalBuffer(total_length))
{
NtRtl.RtlAbsoluteToSelfRelativeSD(sd_buffer, relative_sd, ref total_length).ToNtException();
return(relative_sd.ToArray());
}
}
finally
{
sd_buffer?.Close();
dacl_buffer?.Close();
sacl_buffer?.Close();
owner_buffer?.Close();
group_buffer?.Close();
}
}
private NtResult <SafeHGlobalBuffer> CreateAbsoluteSecurityDescriptor(bool throw_on_error)
{
byte[] dacl = Dacl?.ToByteArray();
byte[] sacl = Sacl?.ToByteArray();
byte[] owner = Owner?.Sid.ToArray();
byte[] group = Group?.Sid.ToArray();
int total_size = GetLength(dacl) + GetLength(sacl) + GetLength(owner) + GetLength(group);
using (var sd_buffer = new SafeStructureInOutBuffer <SecurityDescriptorStructure>(total_size, true))
{
NtStatus status = NtRtl.RtlCreateSecurityDescriptor(sd_buffer, Revision);
if (!status.IsSuccess())
{
return(status.CreateResultFromError <SafeHGlobalBuffer>(throw_on_error));
}
SecurityDescriptorControl control = Control & SecurityDescriptorControl.ValidControlSetMask;
status = NtRtl.RtlSetControlSecurityDescriptor(sd_buffer, control, control);
if (!status.IsSuccess())
{
return(status.CreateResultFromError <SafeHGlobalBuffer>(throw_on_error));
}
int current_ofs = 0;
if (Dacl != null)
{
IntPtr ptr = UpdateBuffer(sd_buffer, Dacl.NullAcl ? null : dacl, ref current_ofs);
status = NtRtl.RtlSetDaclSecurityDescriptor(sd_buffer, true, ptr, Dacl.Defaulted);
if (!status.IsSuccess())
{
return(status.CreateResultFromError <SafeHGlobalBuffer>(throw_on_error));
}
}
if (Sacl != null)
{
IntPtr ptr = UpdateBuffer(sd_buffer, Sacl.NullAcl ? null : sacl, ref current_ofs);
status = NtRtl.RtlSetSaclSecurityDescriptor(sd_buffer, true, ptr, Sacl.Defaulted);
if (!status.IsSuccess())
{
return(status.CreateResultFromError <SafeHGlobalBuffer>(throw_on_error));
}
}
if (Owner != null)
{
IntPtr ptr = UpdateBuffer(sd_buffer, owner, ref current_ofs);
status = NtRtl.RtlSetOwnerSecurityDescriptor(sd_buffer, ptr, Owner.Defaulted);
if (!status.IsSuccess())
{
return(status.CreateResultFromError <SafeHGlobalBuffer>(throw_on_error));
}
}
if (Group != null)
{
IntPtr ptr = UpdateBuffer(sd_buffer, group, ref current_ofs);
status = NtRtl.RtlSetGroupSecurityDescriptor(sd_buffer, ptr, Group.Defaulted);
if (!status.IsSuccess())
{
return(status.CreateResultFromError <SafeHGlobalBuffer>(throw_on_error));
}
}
return(status.CreateResult <SafeHGlobalBuffer>(throw_on_error, () => sd_buffer.Detach()));
}
}
