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//
// Author:
// Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2015 Jb Evain
// Copyright (c) 2008 - 2011 Novell, Inc.
//
// Licensed under the MIT/X11 license.
//
using System;
using System.Security;
using SSP = System.Security.Permissions;
namespace Mono.Cecil.Rocks {
#if INSIDE_ROCKS
public
#endif
static class SecurityDeclarationRocks {
public static PermissionSet ToPermissionSet (this SecurityDeclaration self)
{
if (self == null)
throw new ArgumentNullException ("self");
PermissionSet set;
if (TryProcessPermissionSetAttribute (self, out set))
return set;
return CreatePermissionSet (self);
}
static bool TryProcessPermissionSetAttribute (SecurityDeclaration declaration, out PermissionSet set)
{
set = null;
if (!declaration.HasSecurityAttributes && declaration.SecurityAttributes.Count != 1)
return false;
var security_attribute = declaration.SecurityAttributes [0];
if (!security_attribute.AttributeType.IsTypeOf ("System.Security.Permissions", "PermissionSetAttribute"))
return false;
var attribute = new SSP.PermissionSetAttribute ((SSP.SecurityAction) declaration.Action);
var named_argument = security_attribute.Properties [0];
string value = (string) named_argument.Argument.Value;
switch (named_argument.Name) {
case "XML":
attribute.XML = value;
break;
case "Name":
attribute.Name = value;
break;
default:
throw new NotImplementedException (named_argument.Name);
}
set = attribute.CreatePermissionSet ();
return true;
}
static PermissionSet CreatePermissionSet (SecurityDeclaration declaration)
{
var set = new PermissionSet (SSP.PermissionState.None);
foreach (var attribute in declaration.SecurityAttributes) {
var permission = CreatePermission (declaration, attribute);
set.AddPermission (permission);
}
return set;
}
static IPermission CreatePermission (SecurityDeclaration declaration, SecurityAttribute attribute)
{
var attribute_type = Type.GetType (attribute.AttributeType.FullName);
if (attribute_type == null)
throw new ArgumentException ("attribute");
var security_attribute = CreateSecurityAttribute (attribute_type, declaration);
if (security_attribute == null)
throw new InvalidOperationException ();
CompleteSecurityAttribute (security_attribute, attribute);
return security_attribute.CreatePermission ();
}
static void CompleteSecurityAttribute (SSP.SecurityAttribute security_attribute, SecurityAttribute attribute)
{
if (attribute.HasFields)
CompleteSecurityAttributeFields (security_attribute, attribute);
if (attribute.HasProperties)
CompleteSecurityAttributeProperties (security_attribute, attribute);
}
static void CompleteSecurityAttributeFields (SSP.SecurityAttribute security_attribute, SecurityAttribute attribute)
{
var type = security_attribute.GetType ();
foreach (var named_argument in attribute.Fields)
type.GetField (named_argument.Name).SetValue (security_attribute, named_argument.Argument.Value);
}
static void CompleteSecurityAttributeProperties (SSP.SecurityAttribute security_attribute, SecurityAttribute attribute)
{
var type = security_attribute.GetType ();
foreach (var named_argument in attribute.Properties)
type.GetProperty (named_argument.Name).SetValue (security_attribute, named_argument.Argument.Value, null);
}
static SSP.SecurityAttribute CreateSecurityAttribute (Type attribute_type, SecurityDeclaration declaration)
{
SSP.SecurityAttribute security_attribute;
try {
security_attribute = (SSP.SecurityAttribute) Activator.CreateInstance (
attribute_type, new object [] { (SSP.SecurityAction) declaration.Action });
} catch (MissingMethodException) {
security_attribute = (SSP.SecurityAttribute) Activator.CreateInstance (attribute_type, new object [0]);
}
return security_attribute;
}
public static SecurityDeclaration ToSecurityDeclaration (this PermissionSet self, SecurityAction action, ModuleDefinition module)
{
if (self == null)
throw new ArgumentNullException ("self");
if (module == null)
throw new ArgumentNullException ("module");
var declaration = new SecurityDeclaration (action);
var attribute = new SecurityAttribute (
module.TypeSystem.LookupType ("System.Security.Permissions", "PermissionSetAttribute"));
attribute.Properties.Add (
new CustomAttributeNamedArgument (
"XML",
new CustomAttributeArgument (
module.TypeSystem.String, self.ToXml ().ToString ())));
declaration.SecurityAttributes.Add (attribute);
return declaration;
}
}
}
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