609 lines
20 KiB
C#
609 lines
20 KiB
C#
//
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// System.Net.Security.SslStream.cs
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//
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// Authors:
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// Tim Coleman (tim@timcoleman.com)
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// Atsushi Enomoto (atsushi@ximian.com)
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// Marek Safar (marek.safar@gmail.com)
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//
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// Copyright (C) Tim Coleman, 2004
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// (c) 2004,2007 Novell, Inc. (http://www.novell.com)
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// Copyright 2011 Xamarin Inc.
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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#if SECURITY_DEP
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#if MONO_SECURITY_ALIAS
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extern alias MonoSecurity;
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#endif
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#if MONO_SECURITY_ALIAS
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using MonoCipherAlgorithmType = MonoSecurity::Mono.Security.Protocol.Tls.CipherAlgorithmType;
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using MonoHashAlgorithmType = MonoSecurity::Mono.Security.Protocol.Tls.HashAlgorithmType;
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using MonoExchangeAlgorithmType = MonoSecurity::Mono.Security.Protocol.Tls.ExchangeAlgorithmType;
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using MonoSecurityProtocolType = MonoSecurity::Mono.Security.Protocol.Tls.SecurityProtocolType;
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using MonoSecurity::Mono.Security.Protocol.Tls;
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using MonoSecurity::Mono.Security.Interface;
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#else
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using MonoCipherAlgorithmType = Mono.Security.Protocol.Tls.CipherAlgorithmType;
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using MonoHashAlgorithmType = Mono.Security.Protocol.Tls.HashAlgorithmType;
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using MonoExchangeAlgorithmType = Mono.Security.Protocol.Tls.ExchangeAlgorithmType;
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using MonoSecurityProtocolType = Mono.Security.Protocol.Tls.SecurityProtocolType;
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using Mono.Security.Protocol.Tls;
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using Mono.Security.Interface;
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#endif
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using CipherAlgorithmType = System.Security.Authentication.CipherAlgorithmType;
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using HashAlgorithmType = System.Security.Authentication.HashAlgorithmType;
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using ExchangeAlgorithmType = System.Security.Authentication.ExchangeAlgorithmType;
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using System;
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using System.IO;
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using System.Net;
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using System.Net.Security;
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using System.Security.Authentication;
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using System.Security.Cryptography.X509Certificates;
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using System.Security.Principal;
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using System.Security.Cryptography;
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using System.Threading.Tasks;
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namespace Mono.Net.Security.Private
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{
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/*
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* Strictly private - do not use outside the Mono.Net.Security directory.
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*/
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[MonoTODO ("Non-X509Certificate2 certificate is not supported")]
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internal class LegacySslStream : AuthenticatedStream, IMonoSslStream
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{
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#region Fields
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SslStreamBase ssl_stream;
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ICertificateValidator certificateValidator;
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#endregion // Fields
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#region Constructors
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public LegacySslStream (Stream innerStream, bool leaveInnerStreamOpen, SslStream owner, MonoTlsProvider provider, MonoTlsSettings settings)
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: base (innerStream, leaveInnerStreamOpen)
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{
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SslStream = owner;
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Provider = provider;
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certificateValidator = ChainValidationHelper.GetInternalValidator (provider, settings);
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}
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#endregion // Constructors
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#region Properties
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public override bool CanRead {
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get { return InnerStream.CanRead; }
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}
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public override bool CanSeek {
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get { return InnerStream.CanSeek; }
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}
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public override bool CanTimeout {
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get { return InnerStream.CanTimeout; }
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}
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public override bool CanWrite {
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get { return InnerStream.CanWrite; }
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}
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public override long Length {
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get { return InnerStream.Length; }
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}
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public override long Position {
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get { return InnerStream.Position; }
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set {
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throw new NotSupportedException ("This stream does not support seek operations");
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}
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}
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// AuthenticatedStream overrides
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public override bool IsAuthenticated {
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get { return ssl_stream != null; }
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}
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public override bool IsEncrypted {
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get { return IsAuthenticated; }
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}
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public override bool IsMutuallyAuthenticated {
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get { return IsAuthenticated && (IsServer ? RemoteCertificate != null : LocalCertificate != null); }
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}
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public override bool IsServer {
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get { return ssl_stream is SslServerStream; }
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}
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public override bool IsSigned {
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get { return IsAuthenticated; }
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}
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public override int ReadTimeout {
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get { return InnerStream.ReadTimeout; }
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set { InnerStream.ReadTimeout = value; }
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}
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public override int WriteTimeout {
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get { return InnerStream.WriteTimeout; }
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set { InnerStream.WriteTimeout = value; }
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}
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// SslStream
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public virtual bool CheckCertRevocationStatus {
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get {
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if (!IsAuthenticated)
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return false;
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return ssl_stream.CheckCertRevocationStatus;
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}
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}
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public virtual CipherAlgorithmType CipherAlgorithm {
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get {
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CheckConnectionAuthenticated ();
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switch (ssl_stream.CipherAlgorithm) {
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case MonoCipherAlgorithmType.Des:
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return CipherAlgorithmType.Des;
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case MonoCipherAlgorithmType.None:
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return CipherAlgorithmType.None;
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case MonoCipherAlgorithmType.Rc2:
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return CipherAlgorithmType.Rc2;
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case MonoCipherAlgorithmType.Rc4:
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return CipherAlgorithmType.Rc4;
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case MonoCipherAlgorithmType.SkipJack:
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break;
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case MonoCipherAlgorithmType.TripleDes:
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return CipherAlgorithmType.TripleDes;
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case MonoCipherAlgorithmType.Rijndael:
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switch (ssl_stream.CipherStrength) {
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case 128:
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return CipherAlgorithmType.Aes128;
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case 192:
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return CipherAlgorithmType.Aes192;
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case 256:
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return CipherAlgorithmType.Aes256;
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}
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break;
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}
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throw new InvalidOperationException ("Not supported cipher algorithm is in use. It is likely a bug in SslStream.");
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}
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}
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public virtual int CipherStrength {
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get {
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CheckConnectionAuthenticated ();
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return ssl_stream.CipherStrength;
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}
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}
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public virtual HashAlgorithmType HashAlgorithm {
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get {
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CheckConnectionAuthenticated ();
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switch (ssl_stream.HashAlgorithm) {
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case MonoHashAlgorithmType.Md5:
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return HashAlgorithmType.Md5;
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case MonoHashAlgorithmType.None:
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return HashAlgorithmType.None;
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case MonoHashAlgorithmType.Sha1:
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return HashAlgorithmType.Sha1;
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}
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throw new InvalidOperationException ("Not supported hash algorithm is in use. It is likely a bug in SslStream.");
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}
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}
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public virtual int HashStrength {
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get {
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CheckConnectionAuthenticated ();
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return ssl_stream.HashStrength;
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}
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}
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public virtual ExchangeAlgorithmType KeyExchangeAlgorithm {
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get {
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CheckConnectionAuthenticated ();
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switch (ssl_stream.KeyExchangeAlgorithm) {
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case MonoExchangeAlgorithmType.DiffieHellman:
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return ExchangeAlgorithmType.DiffieHellman;
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case MonoExchangeAlgorithmType.Fortezza:
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break;
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case MonoExchangeAlgorithmType.None:
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return ExchangeAlgorithmType.None;
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case MonoExchangeAlgorithmType.RsaKeyX:
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return ExchangeAlgorithmType.RsaKeyX;
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case MonoExchangeAlgorithmType.RsaSign:
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return ExchangeAlgorithmType.RsaSign;
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}
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throw new InvalidOperationException ("Not supported exchange algorithm is in use. It is likely a bug in SslStream.");
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}
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}
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public virtual int KeyExchangeStrength {
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get {
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CheckConnectionAuthenticated ();
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return ssl_stream.KeyExchangeStrength;
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}
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}
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X509Certificate IMonoSslStream.InternalLocalCertificate {
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get {
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return IsServer ? ssl_stream.ServerCertificate : ((SslClientStream) ssl_stream).SelectedClientCertificate;
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}
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}
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public virtual X509Certificate LocalCertificate {
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get {
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CheckConnectionAuthenticated ();
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return IsServer ? ssl_stream.ServerCertificate : ((SslClientStream) ssl_stream).SelectedClientCertificate;
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}
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}
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public virtual X509Certificate RemoteCertificate {
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get {
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CheckConnectionAuthenticated ();
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return !IsServer ? ssl_stream.ServerCertificate : ((SslServerStream) ssl_stream).ClientCertificate;
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}
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}
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public virtual SslProtocols SslProtocol {
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get {
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CheckConnectionAuthenticated ();
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switch (ssl_stream.SecurityProtocol) {
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case MonoSecurityProtocolType.Default:
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return SslProtocols.Default;
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case MonoSecurityProtocolType.Ssl2:
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return SslProtocols.Ssl2;
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case MonoSecurityProtocolType.Ssl3:
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return SslProtocols.Ssl3;
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case MonoSecurityProtocolType.Tls:
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return SslProtocols.Tls;
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}
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throw new InvalidOperationException ("Not supported SSL/TLS protocol is in use. It is likely a bug in SslStream.");
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}
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}
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#endregion // Properties
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#region Methods
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/*
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AsymmetricAlgorithm GetPrivateKey (X509Certificate cert, string targetHost)
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{
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// FIXME: what can I do for non-X509Certificate2 ?
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X509Certificate2 cert2 = cert as X509Certificate2;
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return cert2 != null ? cert2.PrivateKey : null;
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}
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*/
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X509Certificate OnCertificateSelection (X509CertificateCollection clientCerts, X509Certificate serverCert, string targetHost, X509CertificateCollection serverRequestedCerts)
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{
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#pragma warning disable 618
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string [] acceptableIssuers = new string [serverRequestedCerts != null ? serverRequestedCerts.Count : 0];
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for (int i = 0; i < acceptableIssuers.Length; i++)
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acceptableIssuers [i] = serverRequestedCerts [i].GetIssuerName ();
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X509Certificate clientCertificate;
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certificateValidator.SelectClientCertificate (targetHost, clientCerts, serverCert, acceptableIssuers, out clientCertificate);
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return clientCertificate;
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#pragma warning restore 618
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}
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public virtual IAsyncResult BeginAuthenticateAsClient (string targetHost, AsyncCallback asyncCallback, object asyncState)
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{
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return BeginAuthenticateAsClient (targetHost, new X509CertificateCollection (), SslProtocols.Tls, false, asyncCallback, asyncState);
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}
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public virtual IAsyncResult BeginAuthenticateAsClient (string targetHost, X509CertificateCollection clientCertificates, SslProtocols enabledSslProtocols, bool checkCertificateRevocation, AsyncCallback asyncCallback, object asyncState)
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{
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if (IsAuthenticated)
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throw new InvalidOperationException ("This SslStream is already authenticated");
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SslClientStream s = new SslClientStream (InnerStream, targetHost, !LeaveInnerStreamOpen, GetMonoSslProtocol (enabledSslProtocols), clientCertificates);
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s.CheckCertRevocationStatus = checkCertificateRevocation;
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// Due to the Mono.Security internal, it cannot reuse
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// the delegated argument, as Mono.Security creates
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// another instance of X509Certificate which lacks
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// private key but is filled the private key via this
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// delegate.
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s.PrivateKeyCertSelectionDelegate = delegate (X509Certificate cert, string host) {
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string hash = cert.GetCertHashString ();
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// ... so, we cannot use the delegate argument.
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foreach (X509Certificate cc in clientCertificates) {
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if (cc.GetCertHashString () != hash)
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continue;
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X509Certificate2 cert2 = cc as X509Certificate2;
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cert2 = cert2 ?? new X509Certificate2 (cc);
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return cert2.PrivateKey;
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}
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return null;
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};
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// Even if validation_callback is null this allows us to verify requests where the user
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// does not provide a verification callback but attempts to authenticate with the website
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// as a client (see https://bugzilla.xamarin.com/show_bug.cgi?id=18962 for an example)
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s.ServerCertValidation2 += (mcerts) => {
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X509CertificateCollection certs = null;
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if (mcerts != null) {
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certs = new X509CertificateCollection ();
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for (int i = 0; i < mcerts.Count; i++)
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certs.Add (new X509Certificate2 (mcerts [i].RawData));
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}
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return ((ChainValidationHelper)certificateValidator).ValidateCertificate (targetHost, false, certs);
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};
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s.ClientCertSelectionDelegate = OnCertificateSelection;
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ssl_stream = s;
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return BeginWrite (new byte [0], 0, 0, asyncCallback, asyncState);
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}
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public override IAsyncResult BeginRead (byte[] buffer, int offset, int count, AsyncCallback asyncCallback, object asyncState)
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{
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CheckConnectionAuthenticated ();
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return ssl_stream.BeginRead (buffer, offset, count, asyncCallback, asyncState);
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}
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public virtual IAsyncResult BeginAuthenticateAsServer (X509Certificate serverCertificate, AsyncCallback asyncCallback, object asyncState)
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{
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return BeginAuthenticateAsServer (serverCertificate, false, SslProtocols.Tls, false, asyncCallback, asyncState);
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}
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public virtual IAsyncResult BeginAuthenticateAsServer (X509Certificate serverCertificate, bool clientCertificateRequired, SslProtocols enabledSslProtocols, bool checkCertificateRevocation, AsyncCallback asyncCallback, object asyncState)
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{
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if (IsAuthenticated)
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throw new InvalidOperationException ("This SslStream is already authenticated");
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SslServerStream s = new SslServerStream (InnerStream, serverCertificate, false, clientCertificateRequired, !LeaveInnerStreamOpen, GetMonoSslProtocol (enabledSslProtocols));
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s.CheckCertRevocationStatus = checkCertificateRevocation;
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// Due to the Mono.Security internal, it cannot reuse
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// the delegated argument, as Mono.Security creates
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// another instance of X509Certificate which lacks
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// private key but is filled the private key via this
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// delegate.
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s.PrivateKeyCertSelectionDelegate = delegate (X509Certificate cert, string targetHost) {
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// ... so, we cannot use the delegate argument.
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X509Certificate2 cert2 = serverCertificate as X509Certificate2 ?? new X509Certificate2 (serverCertificate);
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return cert2 != null ? cert2.PrivateKey : null;
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};
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s.ClientCertValidationDelegate = delegate (X509Certificate cert, int[] certErrors) {
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var errors = certErrors.Length > 0 ? MonoSslPolicyErrors.RemoteCertificateChainErrors : MonoSslPolicyErrors.None;
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return ((ChainValidationHelper)certificateValidator).ValidateClientCertificate (cert, errors);
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};
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ssl_stream = s;
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return BeginWrite (new byte[0], 0, 0, asyncCallback, asyncState);
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}
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MonoSecurityProtocolType GetMonoSslProtocol (SslProtocols ms)
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{
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switch (ms) {
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case SslProtocols.Ssl2:
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return MonoSecurityProtocolType.Ssl2;
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case SslProtocols.Ssl3:
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return MonoSecurityProtocolType.Ssl3;
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case SslProtocols.Tls:
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return MonoSecurityProtocolType.Tls;
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default:
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return MonoSecurityProtocolType.Default;
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}
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}
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public override IAsyncResult BeginWrite (byte[] buffer, int offset, int count, AsyncCallback asyncCallback, object asyncState)
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{
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CheckConnectionAuthenticated ();
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return ssl_stream.BeginWrite (buffer, offset, count, asyncCallback, asyncState);
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}
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public virtual void AuthenticateAsClient (string targetHost)
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{
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AuthenticateAsClient (targetHost, new X509CertificateCollection (), SslProtocols.Tls, false);
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}
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public virtual void AuthenticateAsClient (string targetHost, X509CertificateCollection clientCertificates, SslProtocols enabledSslProtocols, bool checkCertificateRevocation)
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{
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EndAuthenticateAsClient (BeginAuthenticateAsClient (
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targetHost, clientCertificates, enabledSslProtocols, checkCertificateRevocation, null, null));
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}
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public virtual void AuthenticateAsServer (X509Certificate serverCertificate)
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{
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AuthenticateAsServer (serverCertificate, false, SslProtocols.Tls, false);
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}
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public virtual void AuthenticateAsServer (X509Certificate serverCertificate, bool clientCertificateRequired, SslProtocols enabledSslProtocols, bool checkCertificateRevocation)
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{
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EndAuthenticateAsServer (BeginAuthenticateAsServer (
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serverCertificate, clientCertificateRequired, enabledSslProtocols, checkCertificateRevocation, null, null));
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}
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protected override void Dispose (bool disposing)
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{
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if (disposing) {
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if (ssl_stream != null)
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ssl_stream.Dispose ();
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ssl_stream = null;
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}
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base.Dispose (disposing);
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}
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public virtual void EndAuthenticateAsClient (IAsyncResult asyncResult)
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{
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CheckConnectionAuthenticated ();
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if (CanRead)
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ssl_stream.EndRead (asyncResult);
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else
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ssl_stream.EndWrite (asyncResult);
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}
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public virtual void EndAuthenticateAsServer (IAsyncResult asyncResult)
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{
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CheckConnectionAuthenticated ();
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if (CanRead)
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ssl_stream.EndRead (asyncResult);
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else
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ssl_stream.EndWrite (asyncResult);
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}
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public override int EndRead (IAsyncResult asyncResult)
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{
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CheckConnectionAuthenticated ();
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return ssl_stream.EndRead (asyncResult);
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}
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public override void EndWrite (IAsyncResult asyncResult)
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{
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CheckConnectionAuthenticated ();
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ssl_stream.EndWrite (asyncResult);
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}
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public override void Flush ()
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{
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CheckConnectionAuthenticated ();
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InnerStream.Flush ();
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}
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public override int Read (byte[] buffer, int offset, int count)
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{
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return EndRead (BeginRead (buffer, offset, count, null, null));
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}
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public override long Seek (long offset, SeekOrigin origin)
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{
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throw new NotSupportedException ("This stream does not support seek operations");
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}
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public override void SetLength (long value)
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{
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InnerStream.SetLength (value);
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}
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public override void Write (byte[] buffer, int offset, int count)
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{
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EndWrite (BeginWrite (buffer, offset, count, null, null));
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}
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public void Write (byte[] buffer)
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{
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Write (buffer, 0, buffer.Length);
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}
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void CheckConnectionAuthenticated ()
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{
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if (!IsAuthenticated)
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throw new InvalidOperationException ("This operation is invalid until it is successfully authenticated");
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}
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public virtual Task AuthenticateAsClientAsync (string targetHost)
|
|
{
|
|
return Task.Factory.FromAsync (BeginAuthenticateAsClient, EndAuthenticateAsClient, targetHost, null);
|
|
}
|
|
|
|
public virtual Task AuthenticateAsClientAsync (string targetHost, X509CertificateCollection clientCertificates, SslProtocols enabledSslProtocols, bool checkCertificateRevocation)
|
|
{
|
|
var t = Tuple.Create (targetHost, clientCertificates, enabledSslProtocols, checkCertificateRevocation, this);
|
|
|
|
return Task.Factory.FromAsync ((callback, state) => {
|
|
var d = (Tuple<string, X509CertificateCollection, SslProtocols, bool, LegacySslStream>) state;
|
|
return d.Item5.BeginAuthenticateAsClient (d.Item1, d.Item2, d.Item3, d.Item4, callback, null);
|
|
}, EndAuthenticateAsClient, t);
|
|
}
|
|
|
|
public virtual Task AuthenticateAsServerAsync (X509Certificate serverCertificate)
|
|
{
|
|
return Task.Factory.FromAsync (BeginAuthenticateAsServer, EndAuthenticateAsServer, serverCertificate, null);
|
|
}
|
|
|
|
public virtual Task AuthenticateAsServerAsync (X509Certificate serverCertificate, bool clientCertificateRequired, SslProtocols enabledSslProtocols, bool checkCertificateRevocation)
|
|
{
|
|
var t = Tuple.Create (serverCertificate, clientCertificateRequired, enabledSslProtocols, checkCertificateRevocation, this);
|
|
|
|
return Task.Factory.FromAsync ((callback, state) => {
|
|
var d = (Tuple<X509Certificate, bool, SslProtocols, bool, LegacySslStream>) state;
|
|
return d.Item5.BeginAuthenticateAsServer (d.Item1, d.Item2, d.Item3, d.Item4, callback, null);
|
|
}, EndAuthenticateAsServer, t);
|
|
}
|
|
|
|
#endregion // Methods
|
|
|
|
#region IMonoSslStream
|
|
|
|
Task IMonoSslStream.ShutdownAsync ()
|
|
{
|
|
return Task.CompletedTask;
|
|
}
|
|
|
|
AuthenticatedStream IMonoSslStream.AuthenticatedStream {
|
|
get { return this; }
|
|
}
|
|
|
|
TransportContext IMonoSslStream.TransportContext {
|
|
get { throw new NotSupportedException (); }
|
|
}
|
|
|
|
public SslStream SslStream {
|
|
get;
|
|
}
|
|
|
|
public MonoTlsProvider Provider {
|
|
get;
|
|
}
|
|
|
|
public MonoTlsConnectionInfo GetConnectionInfo ()
|
|
{
|
|
return null;
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|
|
|
|
#endif
|