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//
// System.Security.AccessControl.CommonAce implementation
//
// Authors:
// Dick Porter <dick@ximian.com>
// Atsushi Enomoto <atsushi@ximian.com>
// Kenneth Bell
//
// Copyright (C) 2006-2007 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Globalization;
using System.Security.Principal;
namespace System.Security.AccessControl {
public sealed class CommonAce : QualifiedAce {
public CommonAce (AceFlags flags, AceQualifier qualifier,
int accessMask, SecurityIdentifier sid,
bool isCallback, byte[] opaque)
: base(ConvertType (qualifier, isCallback),
flags,
opaque)
{
AccessMask = accessMask;
SecurityIdentifier = sid;
}
internal CommonAce (AceType type, AceFlags flags, int accessMask,
SecurityIdentifier sid, byte[] opaque)
: base(type, flags, opaque)
{
AccessMask = accessMask;
SecurityIdentifier = sid;
}
internal CommonAce(byte[] binaryForm, int offset)
: base(binaryForm, offset)
{
int len = ReadUShort(binaryForm, offset + 2);
if (offset > binaryForm.Length - len)
throw new ArgumentException("Invalid ACE - truncated", "binaryForm");
if (len < 8 + SecurityIdentifier.MinBinaryLength)
throw new ArgumentException("Invalid ACE", "binaryForm");
AccessMask = ReadInt(binaryForm, offset + 4);
SecurityIdentifier = new SecurityIdentifier(binaryForm,
offset + 8);
int opaqueLen = len - (8 + SecurityIdentifier.BinaryLength);
if (opaqueLen > 0) {
byte[] opaque = new byte[opaqueLen];
Array.Copy(binaryForm,
offset + 8 + SecurityIdentifier.BinaryLength,
opaque, 0, opaqueLen);
SetOpaque (opaque);
}
}
public override int BinaryLength {
get {
return 8 + SecurityIdentifier.BinaryLength
+ OpaqueLength;
}
}
public override void GetBinaryForm (byte[] binaryForm,
int offset)
{
int len = BinaryLength;
binaryForm[offset] = (byte)this.AceType;
binaryForm[offset + 1] = (byte)this.AceFlags;
WriteUShort ((ushort)len, binaryForm, offset + 2);
WriteInt (AccessMask, binaryForm, offset + 4);
SecurityIdentifier.GetBinaryForm (binaryForm,
offset + 8);
byte[] opaque = GetOpaque ();
if (opaque != null)
Array.Copy (opaque, 0, binaryForm,
offset + 8 + SecurityIdentifier.BinaryLength,
opaque.Length);
}
public static int MaxOpaqueLength (bool isCallback)
{
// Varies by platform?
return 65459;
}
internal override string GetSddlForm ()
{
if (OpaqueLength != 0)
throw new NotImplementedException (
"Unable to convert conditional ACEs to SDDL");
return string.Format (CultureInfo.InvariantCulture,
"({0};{1};{2};;;{3})",
GetSddlAceType (AceType),
GetSddlAceFlags (AceFlags),
GetSddlAccessRights (AccessMask),
SecurityIdentifier.GetSddlForm ());
}
private static AceType ConvertType (AceQualifier qualifier,
bool isCallback)
{
switch (qualifier) {
case AceQualifier.AccessAllowed:
if (isCallback)
return AceType.AccessAllowedCallback;
else
return AceType.AccessAllowed;
case AceQualifier.AccessDenied:
if (isCallback)
return AceType.AccessDeniedCallback;
else
return AceType.AccessDenied;
case AceQualifier.SystemAlarm:
if (isCallback)
return AceType.SystemAlarmCallback;
else
return AceType.SystemAlarm;
case AceQualifier.SystemAudit:
if (isCallback)
return AceType.SystemAuditCallback;
else
return AceType.SystemAudit;
default:
throw new ArgumentException ("Unrecognized ACE qualifier: " + qualifier, "qualifier");
}
}
}
}
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