Zone.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Security / Policy / Zone.cs / 1 / 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.Serialization; 

    [Serializable] 
[System.Runtime.InteropServices.ComVisible(true)]
    sealed public class Zone : IIdentityPermissionFactory, IBuiltInEvidence
    {
        [OptionalField(VersionAdded = 2)] 
        private String m_url;
        private SecurityZone m_zone; 
 
        private static readonly String[] s_names =
            {"MyComputer", "Intranet", "Trusted", "Internet", "Untrusted", "NoZone"}; 

        internal Zone()
        {
            m_url = null; 
            m_zone = SecurityZone.NoZone;
        } 
 
        public Zone(SecurityZone zone)
        { 
            if (zone < SecurityZone.NoZone || zone > SecurityZone.Untrusted)
                throw new ArgumentException( Environment.GetResourceString( "Argument_IllegalZone" ) );

            m_url = null; 
            m_zone = zone;
        } 
 
        private Zone(String url)
        { 
            m_url = url;
            m_zone = SecurityZone.NoZone;
        }
 
        public static Zone CreateFromUrl( String url )
        { 
            if (url == null) 
                throw new ArgumentNullException( "url" );
 
            return new Zone( url );
        }

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private extern static SecurityZone _CreateFromUrl( String url );
 
        public IPermission CreateIdentityPermission( Evidence evidence ) 
        {
            return new ZoneIdentityPermission( SecurityZone ); 
        }

        public SecurityZone SecurityZone
        { 
            get
            { 
                if (m_url != null) 
                    m_zone = _CreateFromUrl( m_url );
                return m_zone; 
            }
        }

        public override bool Equals(Object o) 
        {
            if (o is Zone) 
            { 
                Zone z = (Zone) o;
                return SecurityZone == z.SecurityZone; 
            }
            return false;
        }
 
        public override int GetHashCode()
        { 
            return (int)SecurityZone; 
        }
 
        public Object Copy()
        {
            Zone z = new Zone();
 
            z.m_zone = m_zone;
            z.m_url = m_url; 
 
            return z;
        } 

        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. 
            BCLDebug.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;
        } 
 
        /// 
        int IBuiltInEvidence.OutputToBuffer( char[] buffer, int position, bool verbose ) 
        {
            buffer[position] = BuiltInEvidenceHelper.idZone;
            BuiltInEvidenceHelper.CopyIntToCharArray( (int)SecurityZone, buffer, position + 1 );
            return position + 3; 
        }
 
        ///  
        int IBuiltInEvidence.GetRequiredSize(bool verbose)
        { 
            return 3;
        }

        ///  
        int IBuiltInEvidence.InitFromBuffer( char[] buffer, int position )
        { 
            m_url = null; 
            m_zone = (SecurityZone)BuiltInEvidenceHelper.GetIntFromCharArray(buffer, position);
            return position + 2; 
        }

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

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