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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
namespace System.Security.Permissions
{
using System;
using System.IO;
using System.Security.Util;
using System.Text;
using System.Threading;
using System.Runtime.Remoting;
using System.Security;
using System.Runtime.Serialization;
using System.Reflection;
using System.Globalization;
using System.Diagnostics.Contracts;
[Serializable]
[Flags]
[System.Runtime.InteropServices.ComVisible(true)]
// The csharp compiler requires these types to be public, but they are not used elsewhere.
[Obsolete("SecurityPermissionFlag is no longer accessible to application code.")]
public enum SecurityPermissionFlag
{
NoFlags = 0x00,
/* The following enum value is used in the EE (ASSERT_PERMISSION in security.cpp)
* Should this value change, make corresponding changes there
*/
Assertion = 0x01,
UnmanagedCode = 0x02, // Update vm\Security.h if you change this !
SkipVerification = 0x04, // Update vm\Security.h if you change this !
Execution = 0x08,
ControlThread = 0x10,
ControlEvidence = 0x20,
ControlPolicy = 0x40,
SerializationFormatter = 0x80,
ControlDomainPolicy = 0x100,
ControlPrincipal = 0x200,
ControlAppDomain = 0x400,
RemotingConfiguration = 0x800,
Infrastructure = 0x1000,
BindingRedirects = 0x2000,
AllFlags = 0x3fff,
}
[System.Runtime.InteropServices.ComVisible(true)]
[Serializable]
sealed public class SecurityPermission
: CodeAccessPermission, IUnrestrictedPermission, IBuiltInPermission
{
#pragma warning disable 618
private SecurityPermissionFlag m_flags;
#pragma warning restore 618
//
// Public Constructors
//
public SecurityPermission(PermissionState state)
{
if (state == PermissionState.Unrestricted)
{
SetUnrestricted( true );
}
else if (state == PermissionState.None)
{
SetUnrestricted( false );
Reset();
}
else
{
throw new ArgumentException(Environment.GetResourceString("Argument_InvalidPermissionState"));
}
}
// SecurityPermission
//
#pragma warning disable 618
public SecurityPermission(SecurityPermissionFlag flag)
#pragma warning restore 618
{
VerifyAccess(flag);
SetUnrestricted(false);
m_flags = flag;
}
//------------------------------------------------------
//
// PRIVATE AND PROTECTED MODIFIERS
//
//------------------------------------------------------
private void SetUnrestricted(bool unrestricted)
{
if (unrestricted)
{
#pragma warning disable 618
m_flags = SecurityPermissionFlag.AllFlags;
#pragma warning restore 618
}
}
private void Reset()
{
#pragma warning disable 618
m_flags = SecurityPermissionFlag.NoFlags;
#pragma warning restore 618
}
#pragma warning disable 618
public SecurityPermissionFlag Flags
#pragma warning restore 618
{
set
{
VerifyAccess(value);
m_flags = value;
}
get
{
return m_flags;
}
}
//
// CodeAccessPermission methods
//
/*
* IPermission interface implementation
*/
public override bool IsSubsetOf(IPermission target)
{
if (target == null)
{
return m_flags == 0;
}
SecurityPermission operand = target as SecurityPermission;
if (operand != null)
{
return (((int)this.m_flags) & ~((int)operand.m_flags)) == 0;
}
else
{
throw new
ArgumentException(
Environment.GetResourceString("Argument_WrongType", this.GetType().FullName)
);
}
}
public override IPermission Union(IPermission target) {
if (target == null) return(this.Copy());
if (!VerifyType(target)) {
throw new
ArgumentException(
Environment.GetResourceString("Argument_WrongType", this.GetType().FullName)
);
}
SecurityPermission sp_target = (SecurityPermission) target;
if (sp_target.IsUnrestricted() || IsUnrestricted()) {
return(new SecurityPermission(PermissionState.Unrestricted));
}
#pragma warning disable 618
SecurityPermissionFlag flag_union = (SecurityPermissionFlag)(m_flags | sp_target.m_flags);
#pragma warning restore 618
return(new SecurityPermission(flag_union));
}
public override IPermission Intersect(IPermission target)
{
if (target == null)
return null;
else if (!VerifyType(target))
{
throw new
ArgumentException(
Environment.GetResourceString("Argument_WrongType", this.GetType().FullName)
);
}
SecurityPermission operand = (SecurityPermission)target;
#pragma warning disable 618
SecurityPermissionFlag isectFlags = SecurityPermissionFlag.NoFlags;
#pragma warning restore 618
if (operand.IsUnrestricted())
{
if (this.IsUnrestricted())
return new SecurityPermission(PermissionState.Unrestricted);
else
#pragma warning disable 618
isectFlags = (SecurityPermissionFlag)this.m_flags;
#pragma warning restore 618
}
else if (this.IsUnrestricted())
{
#pragma warning disable 618
isectFlags = (SecurityPermissionFlag)operand.m_flags;
#pragma warning restore 618
}
else
{
#pragma warning disable 618
isectFlags = (SecurityPermissionFlag)m_flags & (SecurityPermissionFlag)operand.m_flags;
#pragma warning restore 618
}
if (isectFlags == 0)
return null;
else
return new SecurityPermission(isectFlags);
}
public override IPermission Copy()
{
if (IsUnrestricted())
return new SecurityPermission(PermissionState.Unrestricted);
else
#pragma warning disable 618
return new SecurityPermission((SecurityPermissionFlag)m_flags);
#pragma warning restore 618
}
public bool IsUnrestricted()
{
#pragma warning disable 618
return m_flags == SecurityPermissionFlag.AllFlags;
#pragma warning restore 618
}
private
#pragma warning disable 618
void VerifyAccess(SecurityPermissionFlag type)
#pragma warning restore 618
{
#pragma warning disable 618
if ((type & ~SecurityPermissionFlag.AllFlags) != 0)
#pragma warning restore 618
throw new ArgumentException(Environment.GetResourceString("Arg_EnumIllegalVal", (int)type));
Contract.EndContractBlock();
}
//
// Object Overrides
//
/// <internalonly/>
int IBuiltInPermission.GetTokenIndex()
{
return SecurityPermission.GetTokenIndex();
}
internal static int GetTokenIndex()
{
return BuiltInPermissionIndex.SecurityPermissionIndex;
}
}
}
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