Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Security / Permissions / RegistryPermission.cs / 1 / RegistryPermission.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // RegistryPermission.cs // namespace System.Security.Permissions { using System; using SecurityElement = System.Security.SecurityElement; #if !FEATURE_PAL using System.Security.AccessControl; #endif using System.Security.Util; using System.IO; using System.Globalization; using System.Runtime.Serialization; [Flags,Serializable] [System.Runtime.InteropServices.ComVisible(true)] public enum RegistryPermissionAccess { NoAccess = 0x00, Read = 0x01, Write = 0x02, Create = 0x04, AllAccess = 0x07, } [System.Runtime.InteropServices.ComVisible(true)] [Serializable()] sealed public class RegistryPermission : CodeAccessPermission, IUnrestrictedPermission, IBuiltInPermission { private StringExpressionSet m_read; private StringExpressionSet m_write; private StringExpressionSet m_create; [OptionalField(VersionAdded = 2)] private StringExpressionSet m_viewAcl; [OptionalField(VersionAdded = 2)] private StringExpressionSet m_changeAcl; private bool m_unrestricted; public RegistryPermission(PermissionState state) { if (state == PermissionState.Unrestricted) { m_unrestricted = true; } else if (state == PermissionState.None) { m_unrestricted = false; } else { throw new ArgumentException(Environment.GetResourceString("Argument_InvalidPermissionState")); } } public RegistryPermission( RegistryPermissionAccess access, String pathList ) { SetPathList( access, pathList ); } #if !FEATURE_PAL public RegistryPermission( RegistryPermissionAccess access, AccessControlActions control, String pathList ) { m_unrestricted = false; AddPathList( access, control, pathList ); } #endif public void SetPathList( RegistryPermissionAccess access, String pathList ) { VerifyAccess( access ); m_unrestricted = false; if ((access & RegistryPermissionAccess.Read) != 0) m_read = null; if ((access & RegistryPermissionAccess.Write) != 0) m_write = null; if ((access & RegistryPermissionAccess.Create) != 0) m_create = null; AddPathList( access, pathList ); } #if !FEATURE_PAL internal void SetPathList( AccessControlActions control, String pathList ) { m_unrestricted = false; if ((control & AccessControlActions.View) != 0) m_viewAcl = null; if ((control & AccessControlActions.Change) != 0) m_changeAcl = null; AddPathList( RegistryPermissionAccess.NoAccess, control, pathList ); } #endif public void AddPathList( RegistryPermissionAccess access, String pathList ) { #if !FEATURE_PAL AddPathList( access, AccessControlActions.None, pathList ); } public void AddPathList( RegistryPermissionAccess access, AccessControlActions control, String pathList ) { #endif VerifyAccess( access ); if ((access & RegistryPermissionAccess.Read) != 0) { if (m_read == null) m_read = new StringExpressionSet(); m_read.AddExpressions( pathList ); } if ((access & RegistryPermissionAccess.Write) != 0) { if (m_write == null) m_write = new StringExpressionSet(); m_write.AddExpressions( pathList ); } if ((access & RegistryPermissionAccess.Create) != 0) { if (m_create == null) m_create = new StringExpressionSet(); m_create.AddExpressions( pathList ); } #if !FEATURE_PAL if ((control & AccessControlActions.View) != 0) { if (m_viewAcl == null) m_viewAcl = new StringExpressionSet(); m_viewAcl.AddExpressions( pathList ); } if ((control & AccessControlActions.Change) != 0) { if (m_changeAcl == null) m_changeAcl = new StringExpressionSet(); m_changeAcl.AddExpressions( pathList ); } #endif } public String GetPathList( RegistryPermissionAccess access ) { VerifyAccess( access ); ExclusiveAccess( access ); if ((access & RegistryPermissionAccess.Read) != 0) { if (m_read == null) { return ""; } return m_read.ToString(); } if ((access & RegistryPermissionAccess.Write) != 0) { if (m_write == null) { return ""; } return m_write.ToString(); } if ((access & RegistryPermissionAccess.Create) != 0) { if (m_create == null) { return ""; } return m_create.ToString(); } /* not reached */ return ""; } private void VerifyAccess( RegistryPermissionAccess access ) { if ((access & ~RegistryPermissionAccess.AllAccess) != 0) throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Arg_EnumIllegalVal"), (int)access)); } private void ExclusiveAccess( RegistryPermissionAccess access ) { if (access == RegistryPermissionAccess.NoAccess) { throw new ArgumentException( Environment.GetResourceString("Arg_EnumNotSingleFlag") ); } if (((int) access & ((int)access-1)) != 0) { throw new ArgumentException( Environment.GetResourceString("Arg_EnumNotSingleFlag") ); } } private bool IsEmpty() { return (!m_unrestricted && (this.m_read == null || this.m_read.IsEmpty()) && (this.m_write == null || this.m_write.IsEmpty()) && (this.m_create == null || this.m_create.IsEmpty()) && (this.m_viewAcl == null || this.m_viewAcl.IsEmpty()) && (this.m_changeAcl == null || this.m_changeAcl.IsEmpty())); } //------------------------------------------------------ // // CODEACCESSPERMISSION IMPLEMENTATION // //----------------------------------------------------- public bool IsUnrestricted() { return m_unrestricted; } //----------------------------------------------------- // // IPERMISSION IMPLEMENTATION // //----------------------------------------------------- public override bool IsSubsetOf(IPermission target) { if (target == null) { return this.IsEmpty(); } RegistryPermission operand = target as RegistryPermission; if (operand == null) throw new ArgumentException(Environment.GetResourceString("Argument_WrongType", this.GetType().FullName)); if (operand.IsUnrestricted()) return true; else if (this.IsUnrestricted()) return false; else return ((this.m_read == null || this.m_read.IsSubsetOf( operand.m_read )) && (this.m_write == null || this.m_write.IsSubsetOf( operand.m_write )) && (this.m_create == null || this.m_create.IsSubsetOf( operand.m_create )) && (this.m_viewAcl == null || this.m_viewAcl.IsSubsetOf( operand.m_viewAcl )) && (this.m_changeAcl == null || this.m_changeAcl.IsSubsetOf( operand.m_changeAcl ))); } public override IPermission Intersect(IPermission target) { if (target == null) { return null; } else if (!VerifyType(target)) { throw new ArgumentException( String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Argument_WrongType"), this.GetType().FullName) ); } else if (this.IsUnrestricted()) { return target.Copy(); } RegistryPermission operand = (RegistryPermission)target; if (operand.IsUnrestricted()) { return this.Copy(); } StringExpressionSet intersectRead = this.m_read == null ? null : this.m_read.Intersect( operand.m_read ); StringExpressionSet intersectWrite = this.m_write == null ? null : this.m_write.Intersect( operand.m_write ); StringExpressionSet intersectCreate = this.m_create == null ? null : this.m_create.Intersect( operand.m_create ); StringExpressionSet intersectViewAcl = this.m_viewAcl == null ? null : this.m_viewAcl.Intersect( operand.m_viewAcl ); StringExpressionSet intersectChangeAcl = this.m_changeAcl == null ? null : this.m_changeAcl.Intersect( operand.m_changeAcl ); if ((intersectRead == null || intersectRead.IsEmpty()) && (intersectWrite == null || intersectWrite.IsEmpty()) && (intersectCreate == null || intersectCreate.IsEmpty()) && (intersectViewAcl == null || intersectViewAcl.IsEmpty()) && (intersectChangeAcl == null || intersectChangeAcl.IsEmpty())) { return null; } RegistryPermission intersectPermission = new RegistryPermission(PermissionState.None); intersectPermission.m_unrestricted = false; intersectPermission.m_read = intersectRead; intersectPermission.m_write = intersectWrite; intersectPermission.m_create = intersectCreate; intersectPermission.m_viewAcl = intersectViewAcl; intersectPermission.m_changeAcl = intersectChangeAcl; return intersectPermission; } public override IPermission Union(IPermission other) { if (other == null) { return this.Copy(); } else if (!VerifyType(other)) { throw new ArgumentException( String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Argument_WrongType"), this.GetType().FullName) ); } RegistryPermission operand = (RegistryPermission)other; if (this.IsUnrestricted() || operand.IsUnrestricted()) { return new RegistryPermission( PermissionState.Unrestricted ); } StringExpressionSet unionRead = this.m_read == null ? operand.m_read : this.m_read.Union( operand.m_read ); StringExpressionSet unionWrite = this.m_write == null ? operand.m_write : this.m_write.Union( operand.m_write ); StringExpressionSet unionCreate = this.m_create == null ? operand.m_create : this.m_create.Union( operand.m_create ); StringExpressionSet unionViewAcl = this.m_viewAcl == null ? operand.m_viewAcl : this.m_viewAcl.Union( operand.m_viewAcl ); StringExpressionSet unionChangeAcl = this.m_changeAcl == null ? operand.m_changeAcl : this.m_changeAcl.Union( operand.m_changeAcl ); if ((unionRead == null || unionRead.IsEmpty()) && (unionWrite == null || unionWrite.IsEmpty()) && (unionCreate == null || unionCreate.IsEmpty()) && (unionViewAcl == null || unionViewAcl.IsEmpty()) && (unionChangeAcl == null || unionChangeAcl.IsEmpty())) { return null; } RegistryPermission unionPermission = new RegistryPermission(PermissionState.None); unionPermission.m_unrestricted = false; unionPermission.m_read = unionRead; unionPermission.m_write = unionWrite; unionPermission.m_create = unionCreate; unionPermission.m_viewAcl = unionViewAcl; unionPermission.m_changeAcl = unionChangeAcl; return unionPermission; } public override IPermission Copy() { RegistryPermission copy = new RegistryPermission(PermissionState.None); if (this.m_unrestricted) { copy.m_unrestricted = true; } else { copy.m_unrestricted = false; if (this.m_read != null) { copy.m_read = this.m_read.Copy(); } if (this.m_write != null) { copy.m_write = this.m_write.Copy(); } if (this.m_create != null) { copy.m_create = this.m_create.Copy(); } if (this.m_viewAcl != null) { copy.m_viewAcl = this.m_viewAcl.Copy(); } if (this.m_changeAcl != null) { copy.m_changeAcl = this.m_changeAcl.Copy(); } } return copy; } public override SecurityElement ToXml() { SecurityElement esd = CodeAccessPermission.CreatePermissionElement( this, "System.Security.Permissions.RegistryPermission" ); if (!IsUnrestricted()) { if (this.m_read != null && !this.m_read.IsEmpty()) { esd.AddAttribute( "Read", SecurityElement.Escape( m_read.ToString() ) ); } if (this.m_write != null && !this.m_write.IsEmpty()) { esd.AddAttribute( "Write", SecurityElement.Escape( m_write.ToString() ) ); } if (this.m_create != null && !this.m_create.IsEmpty()) { esd.AddAttribute( "Create", SecurityElement.Escape( m_create.ToString() ) ); } if (this.m_viewAcl != null && !this.m_viewAcl.IsEmpty()) { esd.AddAttribute( "ViewAccessControl", SecurityElement.Escape( m_viewAcl.ToString() ) ); } if (this.m_changeAcl != null && !this.m_changeAcl.IsEmpty()) { esd.AddAttribute( "ChangeAccessControl", SecurityElement.Escape( m_changeAcl.ToString() ) ); } } else { esd.AddAttribute( "Unrestricted", "true" ); } return esd; } public override void FromXml(SecurityElement esd) { CodeAccessPermission.ValidateElement( esd, this ); String et; if (XMLUtil.IsUnrestricted( esd )) { m_unrestricted = true; return; } m_unrestricted = false; m_read = null; m_write = null; m_create = null; m_viewAcl = null; m_changeAcl = null; et = esd.Attribute( "Read" ); if (et != null) { m_read = new StringExpressionSet( et ); } et = esd.Attribute( "Write" ); if (et != null) { m_write = new StringExpressionSet( et ); } et = esd.Attribute( "Create" ); if (et != null) { m_create = new StringExpressionSet( et ); } et = esd.Attribute( "ViewAccessControl" ); if (et != null) { m_viewAcl = new StringExpressionSet( et ); } et = esd.Attribute( "ChangeAccessControl" ); if (et != null) { m_changeAcl = new StringExpressionSet( et ); } } ///int IBuiltInPermission.GetTokenIndex() { return RegistryPermission.GetTokenIndex(); } internal static int GetTokenIndex() { return BuiltInPermissionIndex.RegistryPermissionIndex; } } }
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