Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / ManagedLibraries / Security / System / Security / permissions / dataprotectionpermission.cs / 1305376 / dataprotectionpermission.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //[....] // // // DataProtectionPermission.cs // namespace System.Security.Permissions { using System.Globalization; [Serializable()] public sealed class DataProtectionPermission : CodeAccessPermission, IUnrestrictedPermission { private DataProtectionPermissionFlags m_flags; public DataProtectionPermission (PermissionState state) { if (state == PermissionState.Unrestricted) m_flags = DataProtectionPermissionFlags.AllFlags; else if (state == PermissionState.None) m_flags = DataProtectionPermissionFlags.NoFlags; else throw new ArgumentException(SecurityResources.GetResourceString("Argument_InvalidPermissionState")); } public DataProtectionPermission (DataProtectionPermissionFlags flag) { this.Flags = flag; } public DataProtectionPermissionFlags Flags { set { VerifyFlags(value); m_flags = value; } get { return m_flags; } } // // IUnrestrictedPermission implementation // public bool IsUnrestricted () { return m_flags == DataProtectionPermissionFlags.AllFlags; } // // IPermission implementation // public override IPermission Union (IPermission target) { if (target == null) return this.Copy(); try { DataProtectionPermission operand = (DataProtectionPermission) target; DataProtectionPermissionFlags flag_union = m_flags | operand.m_flags; if (flag_union == DataProtectionPermissionFlags.NoFlags) return null; else return new DataProtectionPermission(flag_union); } catch (InvalidCastException) { throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Argument_WrongType"), this.GetType().FullName)); } } public override bool IsSubsetOf (IPermission target) { if (target == null) return m_flags == DataProtectionPermissionFlags.NoFlags; try { DataProtectionPermission operand = (DataProtectionPermission) target; DataProtectionPermissionFlags sourceFlag = this.m_flags; DataProtectionPermissionFlags targetFlag = operand.m_flags; return ((sourceFlag & targetFlag) == sourceFlag); } catch (InvalidCastException) { throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Argument_WrongType"), this.GetType().FullName)); } } public override IPermission Intersect (IPermission target) { if (target == null) return null; try { DataProtectionPermission operand = (DataProtectionPermission) target; DataProtectionPermissionFlags flag_intersect = operand.m_flags & this.m_flags; if (flag_intersect == DataProtectionPermissionFlags.NoFlags) return null; else return new DataProtectionPermission(flag_intersect); } catch (InvalidCastException) { throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Argument_WrongType"), this.GetType().FullName)); } } public override IPermission Copy () { if (this.Flags == DataProtectionPermissionFlags.NoFlags) return null; return new DataProtectionPermission(m_flags); } // // FromXml/ToXml // public override SecurityElement ToXml () { SecurityElement securityElement = new SecurityElement("IPermission"); securityElement.AddAttribute("class", this.GetType().FullName + ", " + this.GetType().Module.Assembly.FullName.Replace('\"', '\'')); securityElement.AddAttribute("version", "1"); if (!IsUnrestricted()) securityElement.AddAttribute("Flags", m_flags.ToString()); else securityElement.AddAttribute("Unrestricted", "true"); return securityElement; } public override void FromXml (SecurityElement securityElement) { if (securityElement == null) throw new ArgumentNullException("securityElement"); string className = securityElement.Attribute("class"); if (className == null || className.IndexOf(this.GetType().FullName, StringComparison.Ordinal) == -1) throw new ArgumentException(SecurityResources.GetResourceString("Argument_InvalidClassAttribute"), "securityElement"); string unrestricted = securityElement.Attribute("Unrestricted"); if (unrestricted != null && String.Compare(unrestricted, "true", StringComparison.OrdinalIgnoreCase) == 0) { m_flags = DataProtectionPermissionFlags.AllFlags; return; } m_flags = DataProtectionPermissionFlags.NoFlags; string strFlags = securityElement.Attribute("Flags"); if (strFlags != null) { DataProtectionPermissionFlags flags = (DataProtectionPermissionFlags) Enum.Parse(typeof(DataProtectionPermissionFlags), strFlags); VerifyFlags(flags); m_flags = flags; } } internal static void VerifyFlags (DataProtectionPermissionFlags flags) { if ((flags & ~DataProtectionPermissionFlags.AllFlags) != 0) throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, SecurityResources.GetResourceString("Arg_EnumIllegalVal"), (int)flags)); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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