/
RegistryKey.cs
920 lines (750 loc) · 22.9 KB
/
RegistryKey.cs
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//
// RegistryKey.cs: a single node in the Windows registry
//
// Author:
// Miguel de Icaza (miguel@ximian.com)
// Erik LeBel (eriklebel@yahoo.ca)
// Gert Driesen (drieseng@users.sourceforge.net)
//
//
// Copyright (C) 2004 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;
using System.IO;
using System.Collections;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Security;
using System.Text;
using System.Security.AccessControl;
using System.Security.Permissions;
using Microsoft.Win32.SafeHandles;
namespace Microsoft.Win32
{
#if MOBILE && !WIN_PLATFORM
public sealed class RegistryKey : IDisposable
{
internal RegistryKey (RegistryHive hiveId)
{
throw new PlatformNotSupportedException ();
}
public void Dispose ()
{
}
public void Close ()
{
}
public RegistryKey CreateSubKey (string subkey)
{
throw new PlatformNotSupportedException ();
}
public RegistryKey CreateSubKey (String subkey, bool writable)
{
throw new PlatformNotSupportedException ();
}
public RegistryKey CreateSubKey (String subkey, bool writable, RegistryOptions options)
{
throw new PlatformNotSupportedException ();
}
public RegistryKey CreateSubKey (string subkey, RegistryKeyPermissionCheck permissionCheck)
{
throw new PlatformNotSupportedException ();
}
public RegistryKey CreateSubKey (string subkey, RegistryKeyPermissionCheck permissionCheck, RegistryOptions registryOptions)
{
throw new PlatformNotSupportedException ();
}
public RegistryKey CreateSubKey (string subkey, RegistryKeyPermissionCheck permissionCheck, RegistrySecurity registrySecurity)
{
throw new PlatformNotSupportedException ();
}
public RegistryKey CreateSubKey (string subkey, RegistryKeyPermissionCheck permissionCheck, RegistryOptions registryOptions, RegistrySecurity registrySecurity)
{
throw new PlatformNotSupportedException ();
}
public void DeleteSubKey (string subkey)
{
}
public void DeleteSubKey (string subkey, bool throwOnMissingSubKey)
{
}
public void DeleteSubKeyTree (string subkey)
{
}
public void DeleteSubKeyTree (string subkey, bool throwOnMissingSubKey)
{
}
public void DeleteValue (string name)
{
}
public void DeleteValue (string name, bool throwOnMissingValue)
{
}
public void Flush()
{
}
public static RegistryKey FromHandle (SafeRegistryHandle handle)
{
throw new PlatformNotSupportedException ();
}
public static RegistryKey FromHandle (SafeRegistryHandle handle, RegistryView view)
{
throw new PlatformNotSupportedException ();
}
public string[] GetSubKeyNames ()
{
throw new PlatformNotSupportedException ();
}
public object GetValue (string name)
{
throw new PlatformNotSupportedException ();
}
public object GetValue (string name, object defaultValue)
{
throw new PlatformNotSupportedException ();
}
public object GetValue (string name, object defaultValue, RegistryValueOptions options)
{
throw new PlatformNotSupportedException ();
}
public RegistrySecurity GetAccessControl ()
{
throw new PlatformNotSupportedException ();
}
public RegistrySecurity GetAccessControl (AccessControlSections includeSections)
{
throw new PlatformNotSupportedException ();
}
public RegistryValueKind GetValueKind (string name)
{
throw new PlatformNotSupportedException ();
}
public string[] GetValueNames ()
{
throw new PlatformNotSupportedException ();
}
public static RegistryKey OpenBaseKey (RegistryHive hKey, RegistryView view)
{
throw new PlatformNotSupportedException ();
}
public RegistryKey OpenSubKey (string name)
{
throw new PlatformNotSupportedException ();
}
public RegistryKey OpenSubKey (string name, bool writable)
{
throw new PlatformNotSupportedException ();
}
public RegistryKey OpenSubKey (string name, RegistryRights rights)
{
throw new PlatformNotSupportedException ();
}
public RegistryKey OpenSubKey (string name, RegistryKeyPermissionCheck permissionCheck)
{
throw new PlatformNotSupportedException ();
}
public RegistryKey OpenSubKey (string name, RegistryKeyPermissionCheck permissionCheck, RegistryRights rights)
{
throw new PlatformNotSupportedException ();
}
public static RegistryKey OpenRemoteBaseKey (RegistryHive hKey, string machineName)
{
throw new PlatformNotSupportedException ();
}
public static RegistryKey OpenRemoteBaseKey (RegistryHive hKey, string machineName, RegistryView view)
{
throw new PlatformNotSupportedException ();
}
public void SetAccessControl (RegistrySecurity registrySecurity)
{
throw new PlatformNotSupportedException ();
}
public void SetValue (string name, object value)
{
}
public void SetValue (string name, object value, RegistryValueKind valueKind)
{
}
public SafeRegistryHandle Handle {
get { throw new PlatformNotSupportedException (); }
}
public string Name {
get { throw new PlatformNotSupportedException (); }
}
public int SubKeyCount {
get { throw new PlatformNotSupportedException (); }
}
public int ValueCount {
get { throw new PlatformNotSupportedException (); }
}
public RegistryView View {
get { throw new PlatformNotSupportedException (); }
}
}
#else
/// <summary>
/// Wrapper class for Windows Registry Entry.
/// </summary>
[ComVisible (true)]
public sealed class RegistryKey : MarshalByRefObject, IDisposable
{
//
// This represents the backend data, used when creating the
// RegistryKey object
//
object handle;
SafeRegistryHandle safe_handle;
object hive; // the RegistryHive if the key represents a base key
readonly string qname; // the fully qualified registry key name
readonly bool isRemoteRoot; // is an instance of a remote root key?
readonly bool isWritable; // is the key openen in writable mode
static readonly IRegistryApi RegistryApi;
static RegistryKey ()
{
#if !XAMMAC_4_5
if (Path.DirectorySeparatorChar == '\\')
RegistryApi = new Win32RegistryApi ();
else
#endif
RegistryApi = new UnixRegistryApi ();
}
/// <summary>
/// Construct an instance of a root registry key entry.
/// </summary>
internal RegistryKey (RegistryHive hiveId) : this (hiveId,
new IntPtr ((int) hiveId), false)
{
}
/// <summary>
/// Construct an instance of a root registry key entry.
/// </summary>
internal RegistryKey (RegistryHive hiveId, IntPtr keyHandle, bool remoteRoot)
{
hive = hiveId;
handle = keyHandle;
qname = GetHiveName (hiveId);
isRemoteRoot = remoteRoot;
isWritable = true; // always consider root writable
}
/// <summary>
/// Construct an instance of a registry key entry.
/// </summary>
internal RegistryKey (object data, string keyName, bool writable)
{
handle = data;
qname = keyName;
isWritable = writable;
}
static internal bool IsEquals (RegistryKey a, RegistryKey b)
{
return a.hive == b.hive && a.handle == b.handle && a.qname == b.qname && a.isRemoteRoot == b.isRemoteRoot && a.isWritable == b.isWritable;
}
#region PublicAPI
/// <summary>
/// Dispose of registry key object. Close the
/// key if it's still open.
/// </summary>
public void Dispose ()
{
GC.SuppressFinalize (this);
Close ();
}
/// <summary>
/// Get the fully qualified registry key name.
/// </summary>
public string Name {
get { return qname; }
}
/// <summary>
/// Flush the current registry state to disk.
/// </summary>
public void Flush()
{
RegistryApi.Flush (this);
}
/// <summary>
/// Close the current registry key and flushes the state of the registry
/// right away.
/// </summary>
public void Close()
{
Flush ();
// a handle to a remote hive must be closed, while one to a local
// hive should not be closed
if (!isRemoteRoot && IsRoot)
return;
RegistryApi.Close (this);
handle = null;
safe_handle = null;
}
/// <summary>
/// get the number of sub-keys for this key
/// </summary>
public int SubKeyCount {
get {
AssertKeyStillValid ();
return RegistryApi.SubKeyCount (this);
}
}
/// <summary>
/// get the number of values for this key
/// </summary>
public int ValueCount {
get {
AssertKeyStillValid ();
return RegistryApi.ValueCount (this);
}
}
[ComVisible (false)]
[MonoTODO ("Not implemented in Unix")]
public SafeRegistryHandle Handle {
get {
AssertKeyStillValid ();
if (safe_handle == null) {
IntPtr h = RegistryApi.GetHandle (this);
safe_handle = new SafeRegistryHandle (h, true);
}
return safe_handle;
}
}
[ComVisible (false)]
[MonoLimitation ("View is ignored in Mono.")]
public RegistryView View {
get {
return RegistryView.Default;
}
}
/// <summary>
/// Set a registry value.
/// </summary>
public void SetValue (string name, object value)
{
AssertKeyStillValid ();
if (value == null)
throw new ArgumentNullException ("value");
if (name != null)
AssertKeyNameLength (name);
if (!IsWritable)
throw new UnauthorizedAccessException ("Cannot write to the registry key.");
RegistryApi.SetValue (this, name, value);
}
[ComVisible (false)]
public void SetValue (string name, object value, RegistryValueKind valueKind)
{
AssertKeyStillValid ();
if (value == null)
throw new ArgumentNullException ("value");
if (name != null)
AssertKeyNameLength (name);
if (!IsWritable)
throw new UnauthorizedAccessException ("Cannot write to the registry key.");
RegistryApi.SetValue (this, name, value, valueKind);
}
/// <summary>
/// Open the sub key specified, for read access.
/// </summary>
public RegistryKey OpenSubKey (string name)
{
return OpenSubKey (name, false);
}
/// <summary>
/// Open the sub key specified.
/// </summary>
public RegistryKey OpenSubKey (string name, bool writable)
{
AssertKeyStillValid ();
if (name == null)
throw new ArgumentNullException ("name");
AssertKeyNameLength (name);
return RegistryApi.OpenSubKey (this, name, writable);
}
/// <summary>
/// Get a registry value.
/// </summary>
public object GetValue (string name)
{
return GetValue (name, null);
}
/// <summary>
/// Get a registry value.
/// </summary>
public object GetValue (string name, object defaultValue)
{
AssertKeyStillValid ();
return RegistryApi.GetValue (this, name, defaultValue,
RegistryValueOptions.None);
}
[ComVisible (false)]
public object GetValue (string name, object defaultValue, RegistryValueOptions options)
{
AssertKeyStillValid ();
return RegistryApi.GetValue (this, name, defaultValue, options);
}
[ComVisible (false)]
public RegistryValueKind GetValueKind (string name)
{
return RegistryApi.GetValueKind (this, name);
}
/// <summary>
/// Create a sub key.
/// </summary>
public RegistryKey CreateSubKey (string subkey)
{
AssertKeyStillValid ();
AssertKeyNameNotNull (subkey);
AssertKeyNameLength (subkey);
if (!IsWritable)
throw new UnauthorizedAccessException ("Cannot write to the registry key.");
return RegistryApi.CreateSubKey (this, subkey);
}
[ComVisible (false)]
[MonoLimitation ("permissionCheck is ignored in Mono")]
public RegistryKey CreateSubKey (string subkey, RegistryKeyPermissionCheck permissionCheck)
{
return CreateSubKey (subkey);
}
[ComVisible (false)]
[MonoLimitation ("permissionCheck and registrySecurity are ignored in Mono")]
public RegistryKey CreateSubKey (string subkey, RegistryKeyPermissionCheck permissionCheck, RegistrySecurity registrySecurity)
{
return CreateSubKey (subkey);
}
[ComVisible (false)]
[MonoLimitation ("permissionCheck is ignored in Mono")]
public RegistryKey CreateSubKey (string subkey, RegistryKeyPermissionCheck permissionCheck, RegistryOptions options)
{
AssertKeyStillValid ();
AssertKeyNameNotNull (subkey);
AssertKeyNameLength (subkey);
if (!IsWritable)
throw new UnauthorizedAccessException ("Cannot write to the registry key.");
return RegistryApi.CreateSubKey (this, subkey, options);
}
[ComVisible (false)]
[MonoLimitation ("permissionCheck and registrySecurity are ignored in Mono")]
public RegistryKey CreateSubKey (string subkey, RegistryKeyPermissionCheck permissionCheck, RegistryOptions registryOptions,
RegistrySecurity registrySecurity)
{
return CreateSubKey (subkey, permissionCheck, registryOptions);
}
[ComVisible(false)]
public RegistryKey CreateSubKey (string subkey, bool writable)
{
return CreateSubKey (subkey, writable ? RegistryKeyPermissionCheck.ReadWriteSubTree : RegistryKeyPermissionCheck.ReadSubTree);
}
[ComVisible(false)]
public RegistryKey CreateSubKey (string subkey, bool writable, RegistryOptions options)
{
return CreateSubKey (subkey, writable ? RegistryKeyPermissionCheck.ReadWriteSubTree : RegistryKeyPermissionCheck.ReadSubTree, options);
}
/// <summary>
/// Delete the specified subkey.
/// </summary>
public void DeleteSubKey(string subkey)
{
DeleteSubKey (subkey, true);
}
/// <summary>
/// Delete the specified subkey.
/// </summary>
public void DeleteSubKey(string subkey, bool throwOnMissingSubKey)
{
AssertKeyStillValid ();
AssertKeyNameNotNull (subkey);
AssertKeyNameLength (subkey);
if (!IsWritable)
throw new UnauthorizedAccessException ("Cannot write to the registry key.");
RegistryKey child = OpenSubKey (subkey);
if (child == null) {
if (throwOnMissingSubKey)
throw new ArgumentException ("Cannot delete a subkey tree"
+ " because the subkey does not exist.");
return;
}
if (child.SubKeyCount > 0){
throw new InvalidOperationException ("Registry key has subkeys"
+ " and recursive removes are not supported by this method.");
}
child.Close ();
RegistryApi.DeleteKey (this, subkey, throwOnMissingSubKey);
}
/// <summary>
/// Delete a sub tree (node, and values alike).
/// </summary>
public void DeleteSubKeyTree(string subkey)
{
DeleteSubKeyTree (subkey, true);
}
public
void DeleteSubKeyTree (string subkey, bool throwOnMissingSubKey)
{
// Note: this is done by deleting sub-nodes recursively.
// The preformance is not very good. There may be a
// better way to implement this.
AssertKeyStillValid ();
AssertKeyNameNotNull (subkey);
AssertKeyNameLength (subkey);
RegistryKey child = OpenSubKey (subkey, true);
if (child == null) {
if (!throwOnMissingSubKey)
return;
throw new ArgumentException ("Cannot delete a subkey tree"
+ " because the subkey does not exist.");
}
child.DeleteChildKeysAndValues ();
child.Close ();
DeleteSubKey (subkey, false);
}
/// <summary>
/// Delete a value from the registry.
/// </summary>
public void DeleteValue(string name)
{
DeleteValue (name, true);
}
/// <summary>
/// Delete a value from the registry.
/// </summary>
public void DeleteValue(string name, bool throwOnMissingValue)
{
AssertKeyStillValid ();
if (name == null)
throw new ArgumentNullException ("name");
if (!IsWritable)
throw new UnauthorizedAccessException ("Cannot write to the registry key.");
RegistryApi.DeleteValue (this, name, throwOnMissingValue);
}
public RegistrySecurity GetAccessControl ()
{
return GetAccessControl (AccessControlSections.Owner |
AccessControlSections.Group |
AccessControlSections.Access);
}
public RegistrySecurity GetAccessControl (AccessControlSections includeSections)
{
return new RegistrySecurity (Name, includeSections);
}
/// <summary>
/// Get the names of the sub keys.
/// </summary>
public string[] GetSubKeyNames()
{
AssertKeyStillValid ();
return RegistryApi.GetSubKeyNames (this);
}
/// <summary>
/// Get the names of values contained in this key.
/// </summary>
public string[] GetValueNames()
{
AssertKeyStillValid ();
return RegistryApi.GetValueNames (this);
}
[ComVisible (false)]
[SecurityPermission (SecurityAction.Demand, Flags = SecurityPermissionFlag.UnmanagedCode)]
[MonoTODO ("Not implemented on unix")]
public static RegistryKey FromHandle (SafeRegistryHandle handle)
{
if (handle == null)
throw new ArgumentNullException ("handle");
return RegistryApi.FromHandle (handle);
}
[ComVisible (false)]
[SecurityPermission (SecurityAction.Demand, Flags = SecurityPermissionFlag.UnmanagedCode)]
[MonoTODO ("Not implemented on unix")]
public static RegistryKey FromHandle (SafeRegistryHandle handle, RegistryView view)
{
return FromHandle (handle);
}
[MonoTODO ("Not implemented on unix")]
public static RegistryKey OpenRemoteBaseKey(RegistryHive hKey,string machineName)
{
if (machineName == null)
throw new ArgumentNullException ("machineName");
return RegistryApi.OpenRemoteBaseKey (hKey, machineName);
}
[ComVisible (false)]
[MonoTODO ("Not implemented on unix")]
public static RegistryKey OpenRemoteBaseKey (RegistryHive hKey, string machineName, RegistryView view)
{
if (machineName == null)
throw new ArgumentNullException ("machineName");
return RegistryApi.OpenRemoteBaseKey (hKey, machineName);
}
[ComVisible (false)]
[MonoLimitation ("View is ignored in Mono")]
public static RegistryKey OpenBaseKey (RegistryHive hKey, RegistryView view)
{
switch (hKey) {
case RegistryHive.ClassesRoot:
return Registry.ClassesRoot;
case RegistryHive.CurrentConfig:
return Registry.CurrentConfig;
case RegistryHive.CurrentUser:
return Registry.CurrentUser;
case RegistryHive.DynData:
return Registry.DynData;
case RegistryHive.LocalMachine:
return Registry.LocalMachine;
case RegistryHive.PerformanceData:
return Registry.PerformanceData;
case RegistryHive.Users:
return Registry.Users;
}
throw new ArgumentException ("hKey");
}
[ComVisible (false)]
public RegistryKey OpenSubKey (string name, RegistryKeyPermissionCheck permissionCheck)
{
return OpenSubKey (name, permissionCheck == RegistryKeyPermissionCheck.ReadWriteSubTree);
}
[ComVisible (false)]
[MonoLimitation ("rights are ignored in Mono")]
public RegistryKey OpenSubKey (string name, RegistryRights rights)
{
return OpenSubKey (name);
}
[ComVisible (false)]
[MonoLimitation ("rights are ignored in Mono")]
public RegistryKey OpenSubKey (string name, RegistryKeyPermissionCheck permissionCheck, RegistryRights rights)
{
return OpenSubKey (name, permissionCheck == RegistryKeyPermissionCheck.ReadWriteSubTree);
}
public void SetAccessControl (RegistrySecurity registrySecurity)
{
if (null == registrySecurity)
throw new ArgumentNullException ("registrySecurity");
registrySecurity.PersistModifications (Name);
}
/// <summary>
/// Build a string representation of the registry key.
/// Conatins the fully qualified key name, and the Hex
/// representation of the registry key handle.
/// </summary>
public override string ToString()
{
AssertKeyStillValid ();
return RegistryApi.ToString (this);
}
#endregion // PublicAPI
internal bool IsRoot {
get { return hive != null; }
}
private bool IsWritable {
get { return isWritable; }
}
internal RegistryHive Hive {
get {
if (!IsRoot)
throw new NotSupportedException ();
return (RegistryHive) hive;
}
}
// returns the key handle for the win32 implementation and the
// KeyHandler for the unix implementation
internal object InternalHandle {
get { return handle; }
}
/// <summary>
/// validate that the registry key handle is still usable.
/// </summary>
private void AssertKeyStillValid ()
{
if (handle == null)
throw new ObjectDisposedException ("Microsoft.Win32.RegistryKey");
}
/// <summary>
/// validate that the registry key handle is still usable, and
/// that the 'subKeyName' is not null.
/// </summary>
private void AssertKeyNameNotNull (string subKeyName)
{
if (subKeyName == null)
throw new ArgumentNullException ("name");
}
private void AssertKeyNameLength (string name)
{
if (name.Length > 255)
throw new ArgumentException ("Name of registry key cannot be greater than 255 characters");
}
/// <summary>
/// Utility method to delelte a key's sub keys and values.
/// This method removes a level of indirection when deleting
/// key node trees.
/// </summary>
private void DeleteChildKeysAndValues ()
{
if (IsRoot)
return;
string[] subKeys = GetSubKeyNames ();
foreach (string subKey in subKeys)
{
RegistryKey sub = OpenSubKey (subKey, true);
sub.DeleteChildKeysAndValues ();
sub.Close ();
DeleteSubKey (subKey, false);
}
string[] values = GetValueNames ();
foreach (string value in values) {
DeleteValue (value, false);
}
}
/// <summary>
/// decode a byte array as a string, and strip trailing nulls
/// </summary>
static internal string DecodeString (byte[] data)
{
string stringRep = Encoding.Unicode.GetString (data);
int idx = stringRep.IndexOf ('\0');
if (idx != -1)
stringRep = stringRep.TrimEnd ('\0');
return stringRep;
}
static internal IOException CreateMarkedForDeletionException ()
{
throw new IOException ("Illegal operation attempted on a"
+ " registry key that has been marked for deletion.");
}
static string GetHiveName (RegistryHive hive)
{
switch (hive) {
case RegistryHive.ClassesRoot:
return "HKEY_CLASSES_ROOT";
case RegistryHive.CurrentConfig:
return "HKEY_CURRENT_CONFIG";
case RegistryHive.CurrentUser:
return "HKEY_CURRENT_USER";
case RegistryHive.DynData:
return "HKEY_DYN_DATA";
case RegistryHive.LocalMachine:
return "HKEY_LOCAL_MACHINE";
case RegistryHive.PerformanceData:
return "HKEY_PERFORMANCE_DATA";
case RegistryHive.Users:
return "HKEY_USERS";
}
throw new NotImplementedException (string.Format (
"Registry hive '{0}' is not implemented.", hive.ToString ()));
}
}
#endif
}