Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Security / Policy / Publisher.cs / 1 / 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; [Serializable] [System.Runtime.InteropServices.ComVisible(true)] sealed public class Publisher : IIdentityPermissionFactory, IBuiltInEvidence { private X509Certificate m_cert; internal Publisher() { } public Publisher(X509Certificate cert) { if (cert == null) throw new ArgumentNullException("cert"); 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 { if (m_cert == null) return null; else return new X509Certificate( m_cert ); } } public Object Copy() { Publisher p = new Publisher(); if (m_cert != null) p.m_cert = new X509Certificate(m_cert); return p; } 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. BCLDebug.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; } ///int IBuiltInEvidence.OutputToBuffer( char[] buffer, int position, bool verbose ) { buffer[position++] = BuiltInEvidenceHelper.idPublisher; byte[] certData = this.Certificate.GetRawCertData(); int length = certData.Length; if (verbose) { BuiltInEvidenceHelper.CopyIntToCharArray(length, buffer, position); position += 2; } Buffer.InternalBlockCopy(certData, 0, buffer, position * 2, length); return ((length - 1) / 2) + 1 + position; } /// int IBuiltInEvidence.GetRequiredSize(bool verbose) { // We need to return the size of the byte array converted to chars // (which can be one byte larger than is actually needed) plus // one char for the identifier. // Note: the formula (NumBytes - 1) / 2 + 1 will always calculate // the proper number of chars needed. int length = ((this.Certificate.GetRawCertData().Length - 1) / 2) + 1; if (verbose) return length + 3; else return length + 1; } /// int IBuiltInEvidence.InitFromBuffer( char[] buffer, int position ) { int length = BuiltInEvidenceHelper.GetIntFromCharArray(buffer, position); position += 2; byte[] certData = new byte[length]; int lengthInChars = ((length - 1) / 2) + 1; Buffer.InternalBlockCopy(buffer, position * 2, certData, 0, length); m_cert = new X509Certificate( certData ); return position + lengthInChars; } 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; } } }
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