Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / BCL / System / Security / PermissionToken.cs / 6 / PermissionToken.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
namespace System.Security {
using System;
using System.Security.Util;
using Hashtable = System.Collections.Hashtable;
using System.Runtime.Remoting.Activation;
using System.Security.Permissions;
using System.Reflection;
using System.Collections;
using System.Threading;
using System.Globalization;
using System.Runtime.CompilerServices;
[Flags]
internal enum PermissionTokenType
{
Normal = 0x1,
IUnrestricted = 0x2,
DontKnow = 0x4,
BuiltIn = 0x8
}
[Serializable()]
internal sealed class PermissionTokenKeyComparer : IEqualityComparer
{
// review
private Comparer _caseSensitiveComparer;
private TextInfo _info;
public PermissionTokenKeyComparer(CultureInfo culture)
{
_caseSensitiveComparer = new Comparer( culture );
_info = culture.TextInfo;
}
public int Compare( Object a, Object b )
{
String strA = a as String;
String strB = b as String;
// if it's not a string then we just call the object comparer
if (strA == null || strB == null)
return _caseSensitiveComparer.Compare(a,b);
int i = _caseSensitiveComparer.Compare(a,b);
if (i == 0)
return 0;
if (SecurityManager._IsSameType( strA, strB ))
return 0;
return i;
}
public new bool Equals( Object a, Object b )
{
if (a == b) return true;
if (a == null || b == null) return false;
return Compare( a, b ) == 0;
}
// The data structure consuming this will be responsible for dealing with null objects as keys.
public int GetHashCode( Object obj )
{
String str = obj as String;
if (str == null)
return obj.GetHashCode();
int iComma = str.IndexOf( ',' );
if (iComma == -1)
iComma = str.Length;
int accumulator = 0;
for (int i = 0; i < iComma; ++i)
{
accumulator = (accumulator << 7) ^ str[i] ^ (accumulator >> 25);
}
return accumulator;
}
}
[Serializable]
internal sealed class PermissionToken : ISecurityEncodable
{
private static readonly PermissionTokenFactory s_theTokenFactory;
private static ReflectionPermission s_reflectPerm = null;
private const string c_mscorlibName = "mscorlib";
internal int m_index;
internal PermissionTokenType m_type;
internal String m_strTypeName;
static internal TokenBasedSet s_tokenSet = new TokenBasedSet();
internal static bool IsMscorlibClassName (string className) {
BCLDebug.Assert( c_mscorlibName == Assembly.GetExecutingAssembly().nGetSimpleName(),
"mscorlib name mismatch" );
// If the class name does not look like a fully qualified name, we cannot simply determine if it's
// an mscorlib.dll type so we should return true so the type can be matched with the
// right index in the TokenBasedSet.
int index = className.IndexOf(',');
if (index == -1)
return true;
index = className.LastIndexOf(']');
if (index == -1)
index = 0;
// Search for the string 'mscorlib' in the classname. If we find it, we will conservatively assume it's an mscorlib.dll type and load it.
for (int i = index; i < className.Length; i++) {
if (className[i] == 'm' || className[i] == 'M') {
if (String.Compare(className, i, c_mscorlibName, 0, c_mscorlibName.Length, StringComparison.OrdinalIgnoreCase) == 0)
return true;
}
}
return false;
}
static PermissionToken()
{
s_theTokenFactory = new PermissionTokenFactory( 4 );
}
internal PermissionToken()
{
}
internal PermissionToken(int index, PermissionTokenType type, String strTypeName)
{
m_index = index;
m_type = type;
m_strTypeName = strTypeName;
}
public static PermissionToken GetToken(Type cls)
{
if (cls == null)
return null;
if (cls.GetInterface( "System.Security.Permissions.IBuiltInPermission" ) != null)
{
if (s_reflectPerm == null)
s_reflectPerm = new ReflectionPermission(PermissionState.Unrestricted);
s_reflectPerm.Assert();
MethodInfo method = cls.GetMethod( "GetTokenIndex", BindingFlags.Static | BindingFlags.NonPublic );
BCLDebug.Assert( method != null, "IBuiltInPermission types should have a static method called 'GetTokenIndex'" );
// GetTokenIndex needs to be invoked without any security checks, since doing a security check
// will involve a ReflectionTargetDemand which creates a CompressedStack and attempts to get the
// token.
RuntimeMethodInfo getTokenIndex = method as RuntimeMethodInfo;
BCLDebug.Assert(getTokenIndex != null, "method is not a RuntimeMethodInfo");
int token = (int)getTokenIndex.Invoke(null, BindingFlags.Default, null, null, null, true);
return s_theTokenFactory.BuiltInGetToken(token, null, cls);
}
else
{
return s_theTokenFactory.GetToken(cls, null);
}
}
public static PermissionToken GetToken(IPermission perm)
{
if (perm == null)
return null;
IBuiltInPermission ibPerm = perm as IBuiltInPermission;
if (ibPerm != null)
return s_theTokenFactory.BuiltInGetToken( ibPerm.GetTokenIndex(), perm, null );
else
return s_theTokenFactory.GetToken(perm.GetType(), perm);
}
public static PermissionToken GetToken(String typeStr)
{
return GetToken( typeStr, false );
}
#if _DEBUG
[MethodImplAttribute(MethodImplOptions.NoInlining)] // Methods containing StackCrawlMark local var has to be marked non-inlineable
#endif
public static PermissionToken GetToken(String typeStr, bool bCreateMscorlib)
{
if (typeStr == null)
return null;
if (IsMscorlibClassName( typeStr ))
{
if (!bCreateMscorlib)
{
return null;
}
else
{
return FindToken( Type.GetType( typeStr ) );
}
}
else
{
PermissionToken token = s_theTokenFactory.GetToken(typeStr);
#if _DEBUG
new PermissionSet(PermissionState.Unrestricted).Assert();
StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller;
Type type = RuntimeType.PrivateGetType( typeStr.Trim().Replace( '\'', '\"' ),
false,
false, ref stackMark);
BCLDebug.Assert( (type == null) || (type.Module.Assembly != System.Reflection.Assembly.GetExecutingAssembly()) || (typeStr.IndexOf("mscorlib", StringComparison.Ordinal) < 0),
"We should not go through this path for mscorlib based permissions" );
#endif
return token;
}
}
public static PermissionToken FindToken( Type cls )
{
if (cls == null)
return null;
if (cls.GetInterface( "System.Security.Permissions.IBuiltInPermission" ) != null)
{
if (s_reflectPerm == null)
s_reflectPerm = new ReflectionPermission(PermissionState.Unrestricted);
s_reflectPerm.Assert();
MethodInfo method = cls.GetMethod( "GetTokenIndex", BindingFlags.Static | BindingFlags.NonPublic );
BCLDebug.Assert( method != null, "IBuiltInPermission types should have a static method called 'GetTokenIndex'" );
// GetTokenIndex needs to be invoked without any security checks, since doing a security check
// will involve a ReflectionTargetDemand which creates a CompressedStack and attempts to get the
// token.
RuntimeMethodInfo getTokenIndex = method as RuntimeMethodInfo;
BCLDebug.Assert(getTokenIndex != null, "method is not a RuntimeMethodInfo");
int token = (int)getTokenIndex.Invoke(null, BindingFlags.Default, null, null, null, true);
return s_theTokenFactory.BuiltInGetToken(token, null, cls);
}
else
{
return s_theTokenFactory.FindToken( cls );
}
}
public static PermissionToken FindTokenByIndex( int i )
{
return s_theTokenFactory.FindTokenByIndex( i );
}
public static bool IsTokenProperlyAssigned( IPermission perm, PermissionToken token )
{
PermissionToken heldToken = GetToken( perm );
if (heldToken.m_index != token.m_index)
return false;
if (token.m_type != heldToken.m_type)
return false;
if (perm.GetType().Module.Assembly == Assembly.GetExecutingAssembly() &&
heldToken.m_index >= BuiltInPermissionIndex.NUM_BUILTIN_NORMAL + BuiltInPermissionIndex.NUM_BUILTIN_UNRESTRICTED)
return false;
return true;
}
public SecurityElement ToXml()
{
BCLDebug.Assert( (m_type & PermissionTokenType.DontKnow) == 0, "Should have valid token type when ToXml is called" );
SecurityElement elRoot = new SecurityElement( "PermissionToken" );
if ((m_type & PermissionTokenType.BuiltIn) != 0)
elRoot.AddAttribute( "Index", "" + this.m_index );
else
elRoot.AddAttribute( "Name", SecurityElement.Escape( m_strTypeName ) );
elRoot.AddAttribute("Type", m_type.ToString("F"));
return elRoot;
}
public void FromXml( SecurityElement elRoot )
{
// For the most part there is no parameter checking here since this is an
// internal class and the serialization/deserialization path is controlled.
if (!elRoot.Tag.Equals( "PermissionToken" ))
BCLDebug.Assert( false, "Tried to deserialize non-PermissionToken element here" );
String strName = elRoot.Attribute( "Name" );
PermissionToken realToken;
if (strName != null)
realToken = GetToken( strName, true );
else
realToken = FindTokenByIndex( Int32.Parse( elRoot.Attribute( "Index" ), CultureInfo.InvariantCulture ) );
this.m_index = realToken.m_index;
this.m_type = (PermissionTokenType) Enum.Parse(typeof(PermissionTokenType), elRoot.Attribute("Type"));
BCLDebug.Assert((this.m_type & PermissionTokenType.DontKnow) == 0, "Should have valid token type when FromXml is called.");
this.m_strTypeName = realToken.m_strTypeName;
}
}
// Package access only
internal class PermissionTokenFactory
{
private int m_size;
private int m_index;
private Hashtable m_tokenTable; // Cache of tokens by class string name
private Hashtable m_handleTable; // Cache of tokens by type handle (IntPtr)
private Hashtable m_indexTable; // Cache of tokens by index
// We keep an array of tokens for our built-in permissions.
// This is ordered in terms of unrestricted perms first, normals
// second. Of course, all the ordering is based on the individual
// permissions sticking to the deal, so we do some simple boundary
// checking but mainly leave it to faith.
private PermissionToken[] m_builtIn;
private const String s_unrestrictedPermissionInferfaceName = "System.Security.Permissions.IUnrestrictedPermission";
internal PermissionTokenFactory( int size )
{
m_builtIn = new PermissionToken[BuiltInPermissionIndex.NUM_BUILTIN_NORMAL + BuiltInPermissionIndex.NUM_BUILTIN_UNRESTRICTED];
m_size = size;
m_index = BuiltInPermissionIndex.NUM_BUILTIN_NORMAL + BuiltInPermissionIndex.NUM_BUILTIN_UNRESTRICTED;
m_tokenTable = null;
m_handleTable = new Hashtable( size );
m_indexTable = new Hashtable( size );
}
internal PermissionToken FindToken( Type cls )
{
IntPtr typePtr = cls.TypeHandle.Value;
PermissionToken tok = (PermissionToken)m_handleTable[typePtr];
if (tok != null)
return tok;
if (m_tokenTable == null)
return null;
tok = (PermissionToken)m_tokenTable[cls.AssemblyQualifiedName];
if (tok != null)
{
lock (this)
{
m_handleTable.Add(typePtr, tok);
}
}
return tok;
}
internal PermissionToken FindTokenByIndex( int i )
{
PermissionToken token;
if (i < BuiltInPermissionIndex.NUM_BUILTIN_NORMAL + BuiltInPermissionIndex.NUM_BUILTIN_UNRESTRICTED)
{
token = BuiltInGetToken( i, null, null );
}
else
{
token = (PermissionToken)m_indexTable[i];
}
return token;
}
internal PermissionToken GetToken(Type cls, IPermission perm)
{
BCLDebug.Assert( cls != null, "Must pass in valid type" );
IntPtr typePtr = cls.TypeHandle.Value;
object tok = m_handleTable[typePtr];
if (tok == null)
{
String typeStr = cls.AssemblyQualifiedName;
tok = m_tokenTable != null ? m_tokenTable[typeStr] : null; // Assumes asynchronous lookups are safe
if (tok == null)
{
lock (this)
{
if (m_tokenTable != null)
tok = m_tokenTable[typeStr]; // Make sure it wasn't just added
else
m_tokenTable = new Hashtable( m_size, 1.0f, new PermissionTokenKeyComparer( CultureInfo.InvariantCulture ) );
if (tok == null)
{
if (perm != null)
{
if (CodeAccessPermission.CanUnrestrictedOverride(perm))
tok = new PermissionToken( m_index++, PermissionTokenType.IUnrestricted, typeStr );
else
tok = new PermissionToken( m_index++, PermissionTokenType.Normal, typeStr );
}
else
{
if (cls.GetInterface(s_unrestrictedPermissionInferfaceName) != null)
tok = new PermissionToken( m_index++, PermissionTokenType.IUnrestricted, typeStr );
else
tok = new PermissionToken( m_index++, PermissionTokenType.Normal, typeStr );
}
m_tokenTable.Add(typeStr, tok);
m_indexTable.Add(m_index - 1, tok);
PermissionToken.s_tokenSet.SetItem( ((PermissionToken)tok).m_index, tok );
}
if (!m_handleTable.Contains( typePtr ))
m_handleTable.Add( typePtr, tok );
}
}
else
{
lock (this)
{
if (!m_handleTable.Contains( typePtr ))
m_handleTable.Add( typePtr, tok );
}
}
}
if ((((PermissionToken)tok).m_type & PermissionTokenType.DontKnow) != 0)
{
if (perm != null)
{
BCLDebug.Assert( !(perm is IBuiltInPermission), "This should not be called for built-ins" );
if (CodeAccessPermission.CanUnrestrictedOverride(perm))
((PermissionToken)tok).m_type = PermissionTokenType.IUnrestricted;
else
((PermissionToken)tok).m_type = PermissionTokenType.Normal;
((PermissionToken)tok).m_strTypeName = perm.GetType().AssemblyQualifiedName;
}
else
{
BCLDebug.Assert( cls.GetInterface( "System.Security.Permissions.IBuiltInPermission" ) == null, "This shoudl not be called for built-ins" );
if (cls.GetInterface(s_unrestrictedPermissionInferfaceName) != null)
((PermissionToken)tok).m_type = PermissionTokenType.IUnrestricted;
else
((PermissionToken)tok).m_type = PermissionTokenType.Normal;
((PermissionToken)tok).m_strTypeName = cls.AssemblyQualifiedName;
}
}
return (PermissionToken)tok;
}
internal PermissionToken GetToken(String typeStr)
{
Object tok = null;
tok = m_tokenTable != null ? m_tokenTable[typeStr] : null; // Assumes asynchronous lookups are safe
if (tok == null)
{
lock (this)
{
if (m_tokenTable != null)
tok = m_tokenTable[typeStr]; // Make sure it wasn't just added
else
m_tokenTable = new Hashtable( m_size, 1.0f, new PermissionTokenKeyComparer( CultureInfo.InvariantCulture ) );
if (tok == null)
{
tok = new PermissionToken( m_index++, PermissionTokenType.DontKnow, typeStr );
m_tokenTable.Add(typeStr, tok);
m_indexTable.Add(m_index - 1, tok);
PermissionToken.s_tokenSet.SetItem( ((PermissionToken)tok).m_index, tok );
}
}
}
return (PermissionToken)tok;
}
internal PermissionToken BuiltInGetToken( int index, IPermission perm, Type cls )
{
PermissionToken token = m_builtIn[index];
if (token == null)
{
lock (this)
{
token = m_builtIn[index];
if (token == null)
{
PermissionTokenType permType = PermissionTokenType.DontKnow;
if (perm != null)
{
if(CodeAccessSecurityEngine.DoesFullTrustMeanFullTrust() || perm is IUnrestrictedPermission)
permType = PermissionTokenType.IUnrestricted;
else
permType = PermissionTokenType.Normal;
}
else if (cls != null)
{
if(CodeAccessSecurityEngine.DoesFullTrustMeanFullTrust() || cls.GetInterface( "System.Security.Permissions.IUnrestrictedPermission" ) != null)
permType = PermissionTokenType.IUnrestricted;
else
permType = PermissionTokenType.Normal;
}
token = new PermissionToken( index, permType | PermissionTokenType.BuiltIn, null );
m_builtIn[index] = token;
PermissionToken.s_tokenSet.SetItem( token.m_index, token );
}
}
}
if ((token.m_type & PermissionTokenType.DontKnow) != 0)
{
token.m_type = PermissionTokenType.BuiltIn;
if (perm != null)
{
if(CodeAccessSecurityEngine.DoesFullTrustMeanFullTrust() || perm is IUnrestrictedPermission)
token.m_type |= PermissionTokenType.IUnrestricted;
else
token.m_type |= PermissionTokenType.Normal;
}
else if (cls != null)
{
if(CodeAccessSecurityEngine.DoesFullTrustMeanFullTrust() || cls.GetInterface( "System.Security.Permissions.IUnrestrictedPermission" ) != null)
token.m_type |= PermissionTokenType.IUnrestricted;
else
token.m_type |= PermissionTokenType.Normal;
}
else
token.m_type |= PermissionTokenType.DontKnow;
}
return token;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
namespace System.Security {
using System;
using System.Security.Util;
using Hashtable = System.Collections.Hashtable;
using System.Runtime.Remoting.Activation;
using System.Security.Permissions;
using System.Reflection;
using System.Collections;
using System.Threading;
using System.Globalization;
using System.Runtime.CompilerServices;
[Flags]
internal enum PermissionTokenType
{
Normal = 0x1,
IUnrestricted = 0x2,
DontKnow = 0x4,
BuiltIn = 0x8
}
[Serializable()]
internal sealed class PermissionTokenKeyComparer : IEqualityComparer
{
// review
private Comparer _caseSensitiveComparer;
private TextInfo _info;
public PermissionTokenKeyComparer(CultureInfo culture)
{
_caseSensitiveComparer = new Comparer( culture );
_info = culture.TextInfo;
}
public int Compare( Object a, Object b )
{
String strA = a as String;
String strB = b as String;
// if it's not a string then we just call the object comparer
if (strA == null || strB == null)
return _caseSensitiveComparer.Compare(a,b);
int i = _caseSensitiveComparer.Compare(a,b);
if (i == 0)
return 0;
if (SecurityManager._IsSameType( strA, strB ))
return 0;
return i;
}
public new bool Equals( Object a, Object b )
{
if (a == b) return true;
if (a == null || b == null) return false;
return Compare( a, b ) == 0;
}
// The data structure consuming this will be responsible for dealing with null objects as keys.
public int GetHashCode( Object obj )
{
String str = obj as String;
if (str == null)
return obj.GetHashCode();
int iComma = str.IndexOf( ',' );
if (iComma == -1)
iComma = str.Length;
int accumulator = 0;
for (int i = 0; i < iComma; ++i)
{
accumulator = (accumulator << 7) ^ str[i] ^ (accumulator >> 25);
}
return accumulator;
}
}
[Serializable]
internal sealed class PermissionToken : ISecurityEncodable
{
private static readonly PermissionTokenFactory s_theTokenFactory;
private static ReflectionPermission s_reflectPerm = null;
private const string c_mscorlibName = "mscorlib";
internal int m_index;
internal PermissionTokenType m_type;
internal String m_strTypeName;
static internal TokenBasedSet s_tokenSet = new TokenBasedSet();
internal static bool IsMscorlibClassName (string className) {
BCLDebug.Assert( c_mscorlibName == Assembly.GetExecutingAssembly().nGetSimpleName(),
"mscorlib name mismatch" );
// If the class name does not look like a fully qualified name, we cannot simply determine if it's
// an mscorlib.dll type so we should return true so the type can be matched with the
// right index in the TokenBasedSet.
int index = className.IndexOf(',');
if (index == -1)
return true;
index = className.LastIndexOf(']');
if (index == -1)
index = 0;
// Search for the string 'mscorlib' in the classname. If we find it, we will conservatively assume it's an mscorlib.dll type and load it.
for (int i = index; i < className.Length; i++) {
if (className[i] == 'm' || className[i] == 'M') {
if (String.Compare(className, i, c_mscorlibName, 0, c_mscorlibName.Length, StringComparison.OrdinalIgnoreCase) == 0)
return true;
}
}
return false;
}
static PermissionToken()
{
s_theTokenFactory = new PermissionTokenFactory( 4 );
}
internal PermissionToken()
{
}
internal PermissionToken(int index, PermissionTokenType type, String strTypeName)
{
m_index = index;
m_type = type;
m_strTypeName = strTypeName;
}
public static PermissionToken GetToken(Type cls)
{
if (cls == null)
return null;
if (cls.GetInterface( "System.Security.Permissions.IBuiltInPermission" ) != null)
{
if (s_reflectPerm == null)
s_reflectPerm = new ReflectionPermission(PermissionState.Unrestricted);
s_reflectPerm.Assert();
MethodInfo method = cls.GetMethod( "GetTokenIndex", BindingFlags.Static | BindingFlags.NonPublic );
BCLDebug.Assert( method != null, "IBuiltInPermission types should have a static method called 'GetTokenIndex'" );
// GetTokenIndex needs to be invoked without any security checks, since doing a security check
// will involve a ReflectionTargetDemand which creates a CompressedStack and attempts to get the
// token.
RuntimeMethodInfo getTokenIndex = method as RuntimeMethodInfo;
BCLDebug.Assert(getTokenIndex != null, "method is not a RuntimeMethodInfo");
int token = (int)getTokenIndex.Invoke(null, BindingFlags.Default, null, null, null, true);
return s_theTokenFactory.BuiltInGetToken(token, null, cls);
}
else
{
return s_theTokenFactory.GetToken(cls, null);
}
}
public static PermissionToken GetToken(IPermission perm)
{
if (perm == null)
return null;
IBuiltInPermission ibPerm = perm as IBuiltInPermission;
if (ibPerm != null)
return s_theTokenFactory.BuiltInGetToken( ibPerm.GetTokenIndex(), perm, null );
else
return s_theTokenFactory.GetToken(perm.GetType(), perm);
}
public static PermissionToken GetToken(String typeStr)
{
return GetToken( typeStr, false );
}
#if _DEBUG
[MethodImplAttribute(MethodImplOptions.NoInlining)] // Methods containing StackCrawlMark local var has to be marked non-inlineable
#endif
public static PermissionToken GetToken(String typeStr, bool bCreateMscorlib)
{
if (typeStr == null)
return null;
if (IsMscorlibClassName( typeStr ))
{
if (!bCreateMscorlib)
{
return null;
}
else
{
return FindToken( Type.GetType( typeStr ) );
}
}
else
{
PermissionToken token = s_theTokenFactory.GetToken(typeStr);
#if _DEBUG
new PermissionSet(PermissionState.Unrestricted).Assert();
StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller;
Type type = RuntimeType.PrivateGetType( typeStr.Trim().Replace( '\'', '\"' ),
false,
false, ref stackMark);
BCLDebug.Assert( (type == null) || (type.Module.Assembly != System.Reflection.Assembly.GetExecutingAssembly()) || (typeStr.IndexOf("mscorlib", StringComparison.Ordinal) < 0),
"We should not go through this path for mscorlib based permissions" );
#endif
return token;
}
}
public static PermissionToken FindToken( Type cls )
{
if (cls == null)
return null;
if (cls.GetInterface( "System.Security.Permissions.IBuiltInPermission" ) != null)
{
if (s_reflectPerm == null)
s_reflectPerm = new ReflectionPermission(PermissionState.Unrestricted);
s_reflectPerm.Assert();
MethodInfo method = cls.GetMethod( "GetTokenIndex", BindingFlags.Static | BindingFlags.NonPublic );
BCLDebug.Assert( method != null, "IBuiltInPermission types should have a static method called 'GetTokenIndex'" );
// GetTokenIndex needs to be invoked without any security checks, since doing a security check
// will involve a ReflectionTargetDemand which creates a CompressedStack and attempts to get the
// token.
RuntimeMethodInfo getTokenIndex = method as RuntimeMethodInfo;
BCLDebug.Assert(getTokenIndex != null, "method is not a RuntimeMethodInfo");
int token = (int)getTokenIndex.Invoke(null, BindingFlags.Default, null, null, null, true);
return s_theTokenFactory.BuiltInGetToken(token, null, cls);
}
else
{
return s_theTokenFactory.FindToken( cls );
}
}
public static PermissionToken FindTokenByIndex( int i )
{
return s_theTokenFactory.FindTokenByIndex( i );
}
public static bool IsTokenProperlyAssigned( IPermission perm, PermissionToken token )
{
PermissionToken heldToken = GetToken( perm );
if (heldToken.m_index != token.m_index)
return false;
if (token.m_type != heldToken.m_type)
return false;
if (perm.GetType().Module.Assembly == Assembly.GetExecutingAssembly() &&
heldToken.m_index >= BuiltInPermissionIndex.NUM_BUILTIN_NORMAL + BuiltInPermissionIndex.NUM_BUILTIN_UNRESTRICTED)
return false;
return true;
}
public SecurityElement ToXml()
{
BCLDebug.Assert( (m_type & PermissionTokenType.DontKnow) == 0, "Should have valid token type when ToXml is called" );
SecurityElement elRoot = new SecurityElement( "PermissionToken" );
if ((m_type & PermissionTokenType.BuiltIn) != 0)
elRoot.AddAttribute( "Index", "" + this.m_index );
else
elRoot.AddAttribute( "Name", SecurityElement.Escape( m_strTypeName ) );
elRoot.AddAttribute("Type", m_type.ToString("F"));
return elRoot;
}
public void FromXml( SecurityElement elRoot )
{
// For the most part there is no parameter checking here since this is an
// internal class and the serialization/deserialization path is controlled.
if (!elRoot.Tag.Equals( "PermissionToken" ))
BCLDebug.Assert( false, "Tried to deserialize non-PermissionToken element here" );
String strName = elRoot.Attribute( "Name" );
PermissionToken realToken;
if (strName != null)
realToken = GetToken( strName, true );
else
realToken = FindTokenByIndex( Int32.Parse( elRoot.Attribute( "Index" ), CultureInfo.InvariantCulture ) );
this.m_index = realToken.m_index;
this.m_type = (PermissionTokenType) Enum.Parse(typeof(PermissionTokenType), elRoot.Attribute("Type"));
BCLDebug.Assert((this.m_type & PermissionTokenType.DontKnow) == 0, "Should have valid token type when FromXml is called.");
this.m_strTypeName = realToken.m_strTypeName;
}
}
// Package access only
internal class PermissionTokenFactory
{
private int m_size;
private int m_index;
private Hashtable m_tokenTable; // Cache of tokens by class string name
private Hashtable m_handleTable; // Cache of tokens by type handle (IntPtr)
private Hashtable m_indexTable; // Cache of tokens by index
// We keep an array of tokens for our built-in permissions.
// This is ordered in terms of unrestricted perms first, normals
// second. Of course, all the ordering is based on the individual
// permissions sticking to the deal, so we do some simple boundary
// checking but mainly leave it to faith.
private PermissionToken[] m_builtIn;
private const String s_unrestrictedPermissionInferfaceName = "System.Security.Permissions.IUnrestrictedPermission";
internal PermissionTokenFactory( int size )
{
m_builtIn = new PermissionToken[BuiltInPermissionIndex.NUM_BUILTIN_NORMAL + BuiltInPermissionIndex.NUM_BUILTIN_UNRESTRICTED];
m_size = size;
m_index = BuiltInPermissionIndex.NUM_BUILTIN_NORMAL + BuiltInPermissionIndex.NUM_BUILTIN_UNRESTRICTED;
m_tokenTable = null;
m_handleTable = new Hashtable( size );
m_indexTable = new Hashtable( size );
}
internal PermissionToken FindToken( Type cls )
{
IntPtr typePtr = cls.TypeHandle.Value;
PermissionToken tok = (PermissionToken)m_handleTable[typePtr];
if (tok != null)
return tok;
if (m_tokenTable == null)
return null;
tok = (PermissionToken)m_tokenTable[cls.AssemblyQualifiedName];
if (tok != null)
{
lock (this)
{
m_handleTable.Add(typePtr, tok);
}
}
return tok;
}
internal PermissionToken FindTokenByIndex( int i )
{
PermissionToken token;
if (i < BuiltInPermissionIndex.NUM_BUILTIN_NORMAL + BuiltInPermissionIndex.NUM_BUILTIN_UNRESTRICTED)
{
token = BuiltInGetToken( i, null, null );
}
else
{
token = (PermissionToken)m_indexTable[i];
}
return token;
}
internal PermissionToken GetToken(Type cls, IPermission perm)
{
BCLDebug.Assert( cls != null, "Must pass in valid type" );
IntPtr typePtr = cls.TypeHandle.Value;
object tok = m_handleTable[typePtr];
if (tok == null)
{
String typeStr = cls.AssemblyQualifiedName;
tok = m_tokenTable != null ? m_tokenTable[typeStr] : null; // Assumes asynchronous lookups are safe
if (tok == null)
{
lock (this)
{
if (m_tokenTable != null)
tok = m_tokenTable[typeStr]; // Make sure it wasn't just added
else
m_tokenTable = new Hashtable( m_size, 1.0f, new PermissionTokenKeyComparer( CultureInfo.InvariantCulture ) );
if (tok == null)
{
if (perm != null)
{
if (CodeAccessPermission.CanUnrestrictedOverride(perm))
tok = new PermissionToken( m_index++, PermissionTokenType.IUnrestricted, typeStr );
else
tok = new PermissionToken( m_index++, PermissionTokenType.Normal, typeStr );
}
else
{
if (cls.GetInterface(s_unrestrictedPermissionInferfaceName) != null)
tok = new PermissionToken( m_index++, PermissionTokenType.IUnrestricted, typeStr );
else
tok = new PermissionToken( m_index++, PermissionTokenType.Normal, typeStr );
}
m_tokenTable.Add(typeStr, tok);
m_indexTable.Add(m_index - 1, tok);
PermissionToken.s_tokenSet.SetItem( ((PermissionToken)tok).m_index, tok );
}
if (!m_handleTable.Contains( typePtr ))
m_handleTable.Add( typePtr, tok );
}
}
else
{
lock (this)
{
if (!m_handleTable.Contains( typePtr ))
m_handleTable.Add( typePtr, tok );
}
}
}
if ((((PermissionToken)tok).m_type & PermissionTokenType.DontKnow) != 0)
{
if (perm != null)
{
BCLDebug.Assert( !(perm is IBuiltInPermission), "This should not be called for built-ins" );
if (CodeAccessPermission.CanUnrestrictedOverride(perm))
((PermissionToken)tok).m_type = PermissionTokenType.IUnrestricted;
else
((PermissionToken)tok).m_type = PermissionTokenType.Normal;
((PermissionToken)tok).m_strTypeName = perm.GetType().AssemblyQualifiedName;
}
else
{
BCLDebug.Assert( cls.GetInterface( "System.Security.Permissions.IBuiltInPermission" ) == null, "This shoudl not be called for built-ins" );
if (cls.GetInterface(s_unrestrictedPermissionInferfaceName) != null)
((PermissionToken)tok).m_type = PermissionTokenType.IUnrestricted;
else
((PermissionToken)tok).m_type = PermissionTokenType.Normal;
((PermissionToken)tok).m_strTypeName = cls.AssemblyQualifiedName;
}
}
return (PermissionToken)tok;
}
internal PermissionToken GetToken(String typeStr)
{
Object tok = null;
tok = m_tokenTable != null ? m_tokenTable[typeStr] : null; // Assumes asynchronous lookups are safe
if (tok == null)
{
lock (this)
{
if (m_tokenTable != null)
tok = m_tokenTable[typeStr]; // Make sure it wasn't just added
else
m_tokenTable = new Hashtable( m_size, 1.0f, new PermissionTokenKeyComparer( CultureInfo.InvariantCulture ) );
if (tok == null)
{
tok = new PermissionToken( m_index++, PermissionTokenType.DontKnow, typeStr );
m_tokenTable.Add(typeStr, tok);
m_indexTable.Add(m_index - 1, tok);
PermissionToken.s_tokenSet.SetItem( ((PermissionToken)tok).m_index, tok );
}
}
}
return (PermissionToken)tok;
}
internal PermissionToken BuiltInGetToken( int index, IPermission perm, Type cls )
{
PermissionToken token = m_builtIn[index];
if (token == null)
{
lock (this)
{
token = m_builtIn[index];
if (token == null)
{
PermissionTokenType permType = PermissionTokenType.DontKnow;
if (perm != null)
{
if(CodeAccessSecurityEngine.DoesFullTrustMeanFullTrust() || perm is IUnrestrictedPermission)
permType = PermissionTokenType.IUnrestricted;
else
permType = PermissionTokenType.Normal;
}
else if (cls != null)
{
if(CodeAccessSecurityEngine.DoesFullTrustMeanFullTrust() || cls.GetInterface( "System.Security.Permissions.IUnrestrictedPermission" ) != null)
permType = PermissionTokenType.IUnrestricted;
else
permType = PermissionTokenType.Normal;
}
token = new PermissionToken( index, permType | PermissionTokenType.BuiltIn, null );
m_builtIn[index] = token;
PermissionToken.s_tokenSet.SetItem( token.m_index, token );
}
}
}
if ((token.m_type & PermissionTokenType.DontKnow) != 0)
{
token.m_type = PermissionTokenType.BuiltIn;
if (perm != null)
{
if(CodeAccessSecurityEngine.DoesFullTrustMeanFullTrust() || perm is IUnrestrictedPermission)
token.m_type |= PermissionTokenType.IUnrestricted;
else
token.m_type |= PermissionTokenType.Normal;
}
else if (cls != null)
{
if(CodeAccessSecurityEngine.DoesFullTrustMeanFullTrust() || cls.GetInterface( "System.Security.Permissions.IUnrestrictedPermission" ) != null)
token.m_type |= PermissionTokenType.IUnrestricted;
else
token.m_type |= PermissionTokenType.Normal;
}
else
token.m_type |= PermissionTokenType.DontKnow;
}
return token;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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- ObjectStateFormatter.cs
- ToolStripOverflow.cs
- securitycriticaldata.cs
- BitmapPalettes.cs
- ToggleButton.cs
- HostedElements.cs
- MenuItem.cs
- UrlParameterReader.cs
- AppliedDeviceFiltersDialog.cs
- DataTableReader.cs
- OutOfProcStateClientManager.cs
- ButtonBase.cs
- CompiledRegexRunner.cs
- UpdateDelegates.Generated.cs
- SelectionManager.cs
- ProxyOperationRuntime.cs
- ContextMenuAutomationPeer.cs
- QilUnary.cs
- RequestCachePolicyConverter.cs
- PEFileReader.cs
- KeyMatchBuilder.cs
- InputScopeManager.cs
- RtfNavigator.cs
- KnownTypes.cs
- TrackBarRenderer.cs
- DoubleLink.cs
- SQLResource.cs
- RequestCachePolicy.cs
- EmbeddedMailObject.cs
- PanelStyle.cs
- ToolStripPanelSelectionBehavior.cs
- ProcessThreadCollection.cs
- safePerfProviderHandle.cs
- FieldNameLookup.cs
- ImageList.cs
- BindUriHelper.cs
- MouseEvent.cs
- MenuAutomationPeer.cs
- HMACMD5.cs
- XmlSchemas.cs
- _HeaderInfoTable.cs
- CqlParser.cs
- ECDiffieHellman.cs
- PointHitTestResult.cs
- HtmlTable.cs
- DbDataReader.cs
- BindingList.cs
- NotifyParentPropertyAttribute.cs
- AudioDeviceOut.cs
- InvokeWebService.cs
- DATA_BLOB.cs
- Int32CollectionConverter.cs
- PreApplicationStartMethodAttribute.cs
- ProviderIncompatibleException.cs
- FieldToken.cs
- PasswordTextContainer.cs
- ImpersonateTokenRef.cs
- KeyValueInternalCollection.cs
- SpeechRecognizer.cs
- DataControlButton.cs
- IsolatedStorageFilePermission.cs
- ExpressionLexer.cs
- ValidationError.cs
- IProvider.cs
- ConfigurationException.cs
- OleDbConnectionInternal.cs
- CommandBindingCollection.cs
- DrawingContextWalker.cs
- RefreshPropertiesAttribute.cs
- listitem.cs
- SystemTcpConnection.cs
- PolygonHotSpot.cs
- ElementsClipboardData.cs
- WindowsSecurityToken.cs
- SqlTriggerContext.cs
- NullableFloatSumAggregationOperator.cs
- NumberFormatInfo.cs
- EntityException.cs
- SymbolEqualComparer.cs
- PropertyCollection.cs
- LogExtentCollection.cs
- HttpStreamMessageEncoderFactory.cs
- EncryptedPackageFilter.cs
- RoleServiceManager.cs
- TypeDependencyAttribute.cs
- ProgressBarRenderer.cs
- ObjectViewListener.cs
- WindowsImpersonationContext.cs
- TemplatedWizardStep.cs
- FixedBufferAttribute.cs
- MailAddressCollection.cs
- TreeNodeConverter.cs
- XmlExceptionHelper.cs
- PageOrientation.cs
- TextTreeInsertElementUndoUnit.cs
- SqlBulkCopy.cs
- Validator.cs
- XmlSchemaImport.cs
- PartialList.cs
- Underline.cs