Ejemplo n.º 1
0
 partial void AssertPermissions()
 {
     // Security Asserts can only be done when the assemblies
     // are put in the GAC as documented in
     // http://msdn.microsoft.com/en-us/library/ff648665.aspx
     if (this.Settings.IncludeSecurityAsserts)
     {
         PermissionSet set = new PermissionSet(PermissionState.None);
         set.AddPermission(new MySqlProviderPermission(ConnectionString));
         set.Demand();
         MySqlSecurityPermission.CreatePermissionSet(true).Assert();
     }
 }
Ejemplo n.º 2
0
        public void Open()
        {
            // connect to one of our specified hosts
            try
            {
                baseStream = StreamCreator.GetStream(Settings);
#if !CF && !RT
                if (Settings.IncludeSecurityAsserts)
                {
                    MySqlSecurityPermission.CreatePermissionSet(false).Assert();
                }
#endif
            }
            catch (System.Security.SecurityException)
            {
                throw;
            }
            catch (Exception ex)
            {
                throw new MySqlException(Resources.UnableToConnectToHost,
                                         (int)MySqlErrorCode.UnableToConnectToHost, ex);
            }
            if (baseStream == null)
            {
                throw new MySqlException("Не удаётся подключиться к хосту",
                                         (int)MySqlErrorCode.UnableToConnectToHost);
            }

            int maxSinglePacket = 255 * 255 * 255;
            stream = new MySqlStream(baseStream, Encoding, false);

            stream.ResetTimeout((int)Settings.ConnectionTimeout * 1000);

            // read off the welcome packet and parse out it's values
            packet = stream.ReadPacket();
            int    protocol      = packet.ReadByte();
            string versionString = packet.ReadString();
            owner.isFabric = versionString.EndsWith("fabric", StringComparison.OrdinalIgnoreCase);
            version        = DBVersion.Parse(versionString);
            if (!owner.isFabric && !version.isAtLeast(5, 0, 0))
            {
                throw new NotSupportedException(Resources.ServerTooOld);
            }
            threadId = packet.ReadInteger(4);

            byte[] seedPart1 = packet.ReadStringAsBytes();

            maxSinglePacket = (256 * 256 * 256) - 1;

            // read in Server capabilities if they are provided
            ClientFlags serverCaps = 0;
            if (packet.HasMoreData)
            {
                serverCaps = (ClientFlags)packet.ReadInteger(2);
            }

            /* New protocol with 16 bytes to describe server characteristics */
            owner.ConnectionCharSetIndex = (int)packet.ReadByte();

            serverStatus = (ServerStatusFlags)packet.ReadInteger(2);

            // Since 5.5, high bits of server caps are stored after status.
            // Previously, it was part of reserved always 0x00 13-byte filler.
            uint serverCapsHigh = (uint)packet.ReadInteger(2);
            serverCaps |= (ClientFlags)(serverCapsHigh << 16);

            packet.Position += 11;
            byte[] seedPart2 = packet.ReadStringAsBytes();
            encryptionSeed = new byte[seedPart1.Length + seedPart2.Length];
            seedPart1.CopyTo(encryptionSeed, 0);
            seedPart2.CopyTo(encryptionSeed, seedPart1.Length);

            string authenticationMethod = "";
            if ((serverCaps & ClientFlags.PLUGIN_AUTH) != 0)
            {
                authenticationMethod = packet.ReadString();
            }
            else
            {
                // Some MySql versions like 5.1, don't give name of plugin, default to native password.
                authenticationMethod = "mysql_native_password";
            }

            // based on our settings, set our connection flags
            SetConnectionFlags(serverCaps);

            packet.Clear();
            packet.WriteInteger((int)connectionFlags, 4);
            packet.WriteInteger(maxSinglePacket, 4);
            packet.WriteByte(33); //character set utf-8
            packet.Write(new byte[23]);

#if !CF && !RT
            if ((serverCaps & ClientFlags.SSL) == 0)
            {
                if ((Settings.SslMode != MySqlSslMode.None) &&
                    (Settings.SslMode != MySqlSslMode.Preferred))
                {
                    // Client requires SSL connections.
                    string message = String.Format(Resources.NoServerSSLSupport,
                                                   Settings.Server);
                    throw new MySqlException(message);
                }
            }
            else if (Settings.SslMode != MySqlSslMode.None)
            {
                stream.SendPacket(packet);
                StartSSL();
                packet.Clear();
                packet.WriteInteger((int)connectionFlags, 4);
                packet.WriteInteger(maxSinglePacket, 4);
                packet.WriteByte(33); //character set utf-8
                packet.Write(new byte[23]);
            }
#endif

#if RT
            if (Settings.SslMode != MySqlSslMode.None)
            {
                throw new NotImplementedException("SSL not supported in this WinRT release.");
            }
#endif

            Authenticate(authenticationMethod, false);

            // if we are using compression, then we use our CompressedStream class
            // to hide the ugliness of managing the compression
            if ((connectionFlags & ClientFlags.COMPRESS) != 0)
            {
                stream = new MySqlStream(baseStream, Encoding, true);
            }

            // give our stream the server version we are connected to.
            // We may have some fields that are read differently based
            // on the version of the server we are connected to.
            packet.Version      = version;
            stream.MaxBlockSize = maxSinglePacket;
        }