Zone.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Security / Policy / Zone.cs / 1305376 / Zone.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
//
//  Zone.cs 
//
//  Zone is an IIdentity representing Internet/Intranet/MyComputer etc.
//
 
namespace System.Security.Policy {
    using System.Security.Util; 
    using ZoneIdentityPermission = System.Security.Permissions.ZoneIdentityPermission; 
    using System.Runtime.CompilerServices;
    using System.Runtime.InteropServices; 
    using System.Runtime.Versioning;
    using System.Runtime.Serialization;
    using System.Diagnostics.Contracts;
 
    [Serializable]
    [System.Runtime.InteropServices.ComVisible(true)] 
    public sealed class Zone : EvidenceBase, IIdentityPermissionFactory 
    {
#if FEATURE_CAS_POLICY 
        [OptionalField(VersionAdded = 2)]
        private String m_url;
#endif // FEATURE_CAS_POLICY
        private SecurityZone m_zone; 

        private static readonly String[] s_names = 
            {"MyComputer", "Intranet", "Trusted", "Internet", "Untrusted", "NoZone"}; 

        public Zone(SecurityZone zone) 
        {
            if (zone < SecurityZone.NoZone || zone > SecurityZone.Untrusted)
                throw new ArgumentException( Environment.GetResourceString( "Argument_IllegalZone" ) );
            Contract.EndContractBlock(); 

            m_zone = zone; 
        } 

        private Zone(Zone zone) 
        {
            Contract.Assert(zone != null);

#if FEATURE_CAS_POLICY 
            m_url = zone.m_url;
#endif // FEATURE_CAS_POLICY 
            m_zone = zone.m_zone; 
        }
 
#if FEATURE_CAS_POLICY
        private Zone(String url)
        {
            m_url = url; 
            m_zone = SecurityZone.NoZone;
        } 
 
        public static Zone CreateFromUrl( String url )
        { 
            if (url == null)
                throw new ArgumentNullException( "url" );
            Contract.EndContractBlock();
 
            return new Zone( url );
        } 
 
        [System.Security.SecurityCritical]  // auto-generated
        [ResourceExposure(ResourceScope.None)] 
        [DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
        [SuppressUnmanagedCodeSecurity]
        private extern static SecurityZone _CreateFromUrl( String url );
#endif // FEATURE_CAS_POLICY 

        public IPermission CreateIdentityPermission( Evidence evidence ) 
        { 
            return new ZoneIdentityPermission( SecurityZone );
        } 

        public SecurityZone SecurityZone
        {
            [System.Security.SecuritySafeCritical]  // auto-generated 
            get
            { 
#if FEATURE_CAS_POLICY 
                if (m_url != null)
                    m_zone = _CreateFromUrl( m_url ); 
#endif // FEATURE_CAS_POLICY

                return m_zone;
            } 
        }
 
        public override bool Equals(Object o) 
        {
            Zone other = o as Zone; 
            if (other == null)
            {
                return false;
            } 

            return SecurityZone == other.SecurityZone; 
        } 

        public override int GetHashCode() 
        {
            return (int)SecurityZone;
        }
 
        public override EvidenceBase Clone()
        { 
            return new Zone(this); 
        }
 
        public Object Copy()
        {
            return Clone();
        } 

#if FEATURE_CAS_POLICY 
        internal SecurityElement ToXml() 
        {
            SecurityElement elem = new SecurityElement( "System.Security.Policy.Zone" ); 
            // If you hit this assert then most likely you are trying to change the name of this class.
            // This is ok as long as you change the hard coded string above and change the assert below.
            Contract.Assert( this.GetType().FullName.Equals( "System.Security.Policy.Zone" ), "Class name changed!" );
 
            elem.AddAttribute( "version", "1" );
            if (SecurityZone != SecurityZone.NoZone) 
                elem.AddChild( new SecurityElement( "Zone", s_names[(int)SecurityZone] ) ); 
            else
                elem.AddChild( new SecurityElement( "Zone", s_names[s_names.Length-1] ) ); 
            return elem;
        }
#endif // FEATURE_CAS_POLICY
 
#if FEATURE_CAS_POLICY
        public override String ToString() 
        { 
            return ToXml().ToString();
        } 
#endif // FEATURE_CAS_POLICY

        // INormalizeForIsolatedStorage is not implemented for startup perf
        // equivalent to INormalizeForIsolatedStorage.Normalize() 
        internal Object Normalize()
        { 
            return s_names[(int)SecurityZone]; 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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