Publisher.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 / Publisher.cs / 1305376 / Publisher.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
//
//  Publisher.cs 
//
//  Publisher is an IIdentity representing internet sites.
//
 
namespace System.Security.Policy {
    using System.Runtime.Remoting; 
    using System; 
    using System.IO;
    using System.Security.Util; 
    using System.Collections;
    using PublisherIdentityPermission = System.Security.Permissions.PublisherIdentityPermission;
    using System.Security.Cryptography.X509Certificates;
    using System.Diagnostics.Contracts; 

    [Serializable] 
    [System.Runtime.InteropServices.ComVisible(true)] 
    sealed public class Publisher : EvidenceBase, IIdentityPermissionFactory
    { 
        private X509Certificate m_cert;

        public Publisher(X509Certificate cert)
        { 
            if (cert == null)
                throw new ArgumentNullException("cert"); 
            Contract.EndContractBlock(); 

            m_cert = cert; 
        }

        public IPermission CreateIdentityPermission( Evidence evidence )
        { 
            return new PublisherIdentityPermission( m_cert );
        } 
 
        // Two Publisher objects are equal if the public keys contained within their certificates
        // are equal.  The certs themselves may be different... 

        public override bool Equals(Object o)
        {
            Publisher that = (o as Publisher); 

            return (that != null && PublicKeyEquals( this.m_cert, that.m_cert )); 
        } 

        // Checks if two certificates have the same public key, keyalg, and keyparam. 
        internal static bool PublicKeyEquals( X509Certificate cert1, X509Certificate cert2 )
        {
            if (cert1 == null)
            { 
                return (cert2 == null);
            } 
            else if (cert2 == null) 
            {
                return false; 
            }

            byte[] publicKey1 = cert1.GetPublicKey();
            String keyAlg1 = cert1.GetKeyAlgorithm(); 
            byte[] keyAlgParam1 = cert1.GetKeyAlgorithmParameters();
            byte[] publicKey2 = cert2.GetPublicKey(); 
            String keyAlg2 = cert2.GetKeyAlgorithm(); 
            byte[] keyAlgParam2 = cert2.GetKeyAlgorithmParameters();
 
            // Keys are most likely to be different of the three components,
            // so check them first

            int len = publicKey1.Length; 
            if (len != publicKey2.Length) return(false);
            for (int i = 0; i < len; i++) { 
                if (publicKey1[i] != publicKey2[i]) return(false); 
            }
            if (!(keyAlg1.Equals(keyAlg2))) return(false); 
            len = keyAlgParam1.Length;
            if (keyAlgParam2.Length != len) return(false);
            for (int i = 0; i < len; i++) {
                if (keyAlgParam1[i] != keyAlgParam2[i]) return(false); 
            }
 
            return true; 
        }
 
        public override int GetHashCode()
        {
            return m_cert.GetHashCode();
        } 

        public X509Certificate Certificate 
        { 
            get { return new X509Certificate(m_cert); }
        } 

        public override EvidenceBase Clone()
        {
            return new Publisher(m_cert); 
        }
 
        public object Copy() 
        {
            return Clone(); 
        }

        internal SecurityElement ToXml()
        { 
            SecurityElement elem = new SecurityElement( "System.Security.Policy.Publisher" );
            // 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.Publisher" ), "Class name changed!" );
 
            elem.AddAttribute( "version", "1" );
            elem.AddChild( new SecurityElement( "X509v3Certificate", m_cert != null ? m_cert.GetRawCertDataString() : "" ) );
            return elem;
        } 

        public override String ToString() 
        { 
            return ToXml().ToString();
        } 

        // INormalizeForIsolatedStorage is not implemented for startup perf
        // equivalent to INormalizeForIsolatedStorage.Normalize()
        internal Object Normalize() 
        {
            MemoryStream ms = new MemoryStream(m_cert.GetRawCertData()); 
            ms.Position = 0; 
            return ms;
        } 
    }
}

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

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