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 MySqlClientPermission(ConnectionString));
set.Demand();
MySqlSecurityPermission.CreatePermissionSet(true).Assert();
}
}
public void Open()
{
// connect to one of our specified hosts
try
{
baseStream = StreamCreator.GetStream(Settings);
#if !RT
if (Settings.IncludeSecurityAsserts)
{
MySqlSecurityPermission.CreatePermissionSet(false).Assert();
}
#endif
}
catch (System.Security.SecurityException)
{
throw;
}
catch (Exception ex)
{
throw new MySqlException(MySqlResources.UnableToConnectToHost,
(int)MySqlErrorCode.UnableToConnectToHost, ex);
}
if (baseStream == null)
{
throw new MySqlException(MySqlResources.UnableToConnectToHost,
(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);
isEnterprise = versionString.ToLowerInvariant().Contains("-enterprise") ||
versionString.ToLowerInvariant().Contains("-commercial");
version = DBVersion.Parse(versionString);
if (!owner.isFabric && !version.isAtLeast(5, 0, 0))
{
throw new NotSupportedException(MySqlResources.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 !RT
if ((serverCaps & ClientFlags.SSL) == 0)
{
if ((Settings.SslMode != MySqlSslMode.None) &&
(Settings.SslMode != MySqlSslMode.Preferred))
{
// Client requires SSL connections.
string message = String.Format(MySqlResources.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;
}
