/// <summary>
/// Adds extended controls to a packet.
/// </summary>
/// <param name="packet">The packet to which the controls are added.</param>
/// <param name="controls">The controls.</param>
internal void AddDirectoryControls(AdtsLdapPacket packet, params MsLdap.DirectoryControl[] controls)
{
LDAPMessage message = packet.ldapMessagev3;
int existingControlCount = (message.controls != null) ? message.controls.Elements.Length : 0;
Control[] controlArray = new Control[existingControlCount + controls.Length];
// Add original existing controls
for (int i = 0; i < existingControlCount; i++)
{
controlArray[i] = message.controls.Elements[i];
}
// Add newly added controls
for (int i = 0; i < controls.Length; i++)
{
controlArray[existingControlCount + i] = new Control(
new LDAPOID(controls[i].Type),
new Asn1Boolean(controls[i].IsCritical),
new Asn1OctetString(controls[i].GetValue()));
}
Controls allControls = new Controls(controlArray);
message.controls = allControls;
}
/// <summary>
/// Adds extended controls to a packet.
/// </summary>
/// <param name="packet">The packet to which the controls are added.</param>
/// <param name="controls">The controls.</param>
internal void AddDirectoryControls(AdtsLdapPacket packet, params MsLdap.DirectoryControl[] controls)
{
LDAPMessage message = packet.ldapMessagev3;
int existingControlCount = (message.controls != null) ? message.controls.Elements.Length : 0;
Control[] controlArray = new Control[existingControlCount + controls.Length];
// Add original existing controls
for (int i = 0; i < existingControlCount; i++)
{
controlArray[i] = message.controls.Elements[i];
}
// Add newly added controls
for (int i = 0; i < controls.Length; i++)
{
controlArray[existingControlCount + i] = new Control(
new LDAPOID(controls[i].Type),
new Asn1Boolean(controls[i].IsCritical),
new Asn1OctetString(controls[i].GetValue()));
}
Controls allControls = new Controls(controlArray);
message.controls = allControls;
}
/// <summary>
/// Expects a packet.
/// </summary>
/// <param name="timeout">The timeout to be waited.</param>
/// <param name="context">The context to be returned.</param>
/// <returns>The packet received.</returns>
public AdtsLdapPacket ExpectPacket(TimeSpan timeout, out AdtsLdapContext context)
{
while (true)
{
TransportEvent transportEvent = this.transportStack.ExpectTransportEvent(timeout);
if (transportEvent.EventType == EventType.ReceivedPacket)
{
AdtsLdapPacket packet = (AdtsLdapPacket)transportEvent.EventObject;
context = this.contextManager.GetContext((IPEndPoint)transportEvent.EndPoint, this.isTcp);
return(packet);
}
else if (transportEvent.EventType == EventType.Disconnected)
{
// Remove context if disconnected.
this.transportStack.Disconnect((IPEndPoint)transportEvent.EndPoint);
context = this.contextManager.GetContext((IPEndPoint)transportEvent.EndPoint, this.isTcp);
this.contextManager.RemoveContext((IPEndPoint)transportEvent.EndPoint, this.isTcp);
return(null);
}
else if (transportEvent.EventType == EventType.Exception)
{
throw (Exception)transportEvent.EventObject;
}
}
}
/// <summary>
/// Adds extended controls to a packet.
/// </summary>
/// <param name="packet">The packet to which the controls are added.</param>
/// <param name="controls">The controls.</param>
/// <exception cref="NotSupportedException">
/// Thrown when trying to add controls to an LDAP v2 packet.
/// </exception>
public void AddDirectoryControls(AdtsLdapPacket packet, params DirectoryControl[] controls)
{
if (packet.ldapMessagev2 != null)
{
throw new NotSupportedException("Extended controls are only supported for LDAP v3 packets.");
}
this.encoderv3.AddDirectoryControls(packet, controls);
}
/// <summary>
/// Adds extended controls to a packet.
/// </summary>
/// <param name="packet">The packet to which the controls are added.</param>
/// <param name="controls">The controls.</param>
/// <exception cref="NotSupportedException">
/// Thrown when trying to add controls to an LDAP v2 packet.
/// </exception>
public virtual void AddDirectoryControls(AdtsLdapPacket packet, params DirectoryControl[] controls)
{
if (this.encoder is AdtsLdapV2Encoder)
{
throw new NotSupportedException("Extended controls are only supported for LDAP v3 packets.");
}
(this.encoder as AdtsLdapV3Encoder).AddDirectoryControls(packet, controls);
}
/// <summary>
/// Sends a packet to server.
/// </summary>
/// <param name="packet">The packet to be sent.</param>
/// <exception cref="InvalidOperationException">
/// thrown when Transport is null! Please invoke Connect() first!
/// </exception>
public virtual void SendPacket(AdtsLdapPacket packet)
{
if (this.transportStack == null)
{
throw new InvalidOperationException("Transport is null! Please invoke Connect() first!");
}
this.transportStack.SendPacket(packet);
this.context.MessageId++;
}
/// <summary>
/// Decodes an LDAP v3 packet.
/// </summary>
/// <param name="messageBytes">The message bytes that contains the packet data.</param>
/// <param name="context">The context that contains decode-related information.</param>
/// <returns>Decoded LDAP v3 packet.</returns>
internal override AdtsLdapPacket ParseAdtsLdapPacket(byte[] messageBytes, AdtsLdapContext context)
{
LDAPMessage message = new LDAPMessage();
Asn1DecodingBuffer decodeBuffer = new Asn1DecodingBuffer(messageBytes);
message.BerDecode(decodeBuffer);
Type innerMessageType = message.protocolOp.GetData().GetType();
AdtsLdapPacket packet = CreatePacketFromType(innerMessageType);
context.MessageId = (long)message.messageID.Value;
packet.messageId = (long)message.messageID.Value;
packet.ldapMessagev3 = message;
return(packet);
}
/// <summary>
/// This method encapsulates LdapV2Decoder and LdapV3Decoder because the incoming packets may be
/// LDAP v2 or v3 packets, the decoding may require both decoders if the LDAP version that client uses
/// is not clear.
/// </summary>
/// <param name="endPoint">The end point of the client.</param>
/// <param name="messageBytes">The message bytes that contains the packet data.</param>
/// <param name="consumedLength">Consumed length.</param>
/// <param name="expectedLength">
/// Indicates expected length if the message bytes doesn't all packet data.
/// </param>
/// <returns>Decoded packets.</returns>
internal override StackPacket[] DecodeLdapPacketCallBack(
object endPoint,
byte[] messageBytes,
out int consumedLength,
out int expectedLength)
{
// Get packet data, start decoding.
IPEndPoint remote = (IPEndPoint)endPoint;
AdtsLdapContext context = GetContext(remote, this.server.IsTcp);
byte[] data = messageBytes;
// decode messageBytes if needed
if (context != null && messageBytes != null)
{
// if security is not init, and the package is SslHandshake, init security.
if (context.Security == null)
{
AdtsLdapSslTlsSecurityHeader header = new AdtsLdapSslTlsSecurityHeader();
header.FromBytes(messageBytes);
if (header.IsSslHandShake)
{
this.server.SslStartup(context);
}
}
// decode messageBytes with security.
if (context.Security != null)
{
data = this.server.Decrypt(context, messageBytes);
}
}
byte[] packetData = this.GetSinglePacketData(data, out consumedLength, out expectedLength);
// add the comsumed length of security decorder
if (context != null && context.Security != null && context.Security.ConsumedData)
{
consumedLength = context.Security.ConsumedLength;
}
if (packetData == null)
{
return(null);
}
// New connection. Try both LDAP v2 and v3 decoders. Note that for requests that don't have version
// context(e.g., UDP search requests), LDAP v3 is used by default.
AdtsLdapPacket packet = null;
if (context == null)
{
context = new AdtsLdapContext(AdtsLdapVersion.V3, remote);
packet = this.decoderv3.ParseAdtsLdapPacket(
this.decoderv3.AuthenticateMessage(packetData),
context);
// synchronize the message ID with newly received packet.
context.MessageId = packet.messageId;
// Check BindRequestPacket, normally it's the first message from client in which
// contains the LDAP version. And since LDAP v3 decoder can decode LDAP v2 messages
// without any exception, we need to check into the 'version' variable in the request.
AdtsBindRequestPacket bindRequestPacket = packet as AdtsBindRequestPacket;
if (bindRequestPacket != null)
{
LdapV3.BindRequest bindRequest =
(LdapV3.BindRequest)bindRequestPacket.GetInnerRequestOrResponse();
// Version doesn't match. Decode again with LDAP v2 decoder and update context version.
if ((AdtsLdapVersion)bindRequest.version.Value == AdtsLdapVersion.V2)
{
packet = this.decoderv2.ParseAdtsLdapPacket(
this.decoderv2.AuthenticateMessage(packetData),
context);
context.ClientVersion = context.ServerVersion = AdtsLdapVersion.V2;
}
}
// Add context.
this.server.ContextManager.AddContext(context, this.server.IsTcp);
}
else
{
if (context.ClientVersion == AdtsLdapVersion.V2)
{
packet = this.decoderv2.ParseAdtsLdapPacket(
this.decoderv2.AuthenticateMessage(packetData),
context);
}
else
{
packet = this.decoderv3.ParseAdtsLdapPacket(
this.decoderv3.AuthenticateMessage(packetData),
context);
}
// synchronize the message ID with newly received packet.
context.MessageId = packet.messageId;
}
return(new StackPacket[] { packet });
}
/// <summary>
/// Sends a packet.
/// </summary>
/// <param name="context">The context that contains related info about client.</param>
/// <param name="packet">The packet to be sent.</param>
public void SendPacket(AdtsLdapContext context, AdtsLdapPacket packet)
{
transportStack.SendPacket(context.RemoteAddress, packet);
}
/// <summary>
/// Adds extended controls to a packet.
/// </summary>
/// <param name="packet">The packet to which the controls are added.</param>
/// <param name="controls">The controls.</param>
/// <exception cref="NotSupportedException">
/// Thrown when trying to add controls to an LDAP v2 packet.
/// </exception>
public void AddDirectoryControls(AdtsLdapPacket packet, params DirectoryControl[] controls)
{
if (packet.ldapMessagev2 != null)
{
throw new NotSupportedException("Extended controls are only supported for LDAP v3 packets.");
}
this.encoderv3.AddDirectoryControls(packet, controls);
}
/// <summary>
/// Sends a packet.
/// </summary>
/// <param name="context">The context that contains related info about client.</param>
/// <param name="packet">The packet to be sent.</param>
public void SendPacket(AdtsLdapContext context, AdtsLdapPacket packet)
{
transportStack.SendPacket(context.RemoteAddress, packet);
}
/// <summary>
/// Adds extended controls to a packet.
/// </summary>
/// <param name="packet">The packet to which the controls are added.</param>
/// <param name="controls">The controls.</param>
/// <exception cref="NotSupportedException">
/// Thrown when trying to add controls to an LDAP v2 packet.
/// </exception>
public virtual void AddDirectoryControls(AdtsLdapPacket packet, params DirectoryControl[] controls)
{
if (this.encoder is AdtsLdapV2Encoder)
{
throw new NotSupportedException("Extended controls are only supported for LDAP v3 packets.");
}
(this.encoder as AdtsLdapV3Encoder).AddDirectoryControls(packet, controls);
}
/// <summary>
/// Sends a packet to server.
/// </summary>
/// <param name="packet">The packet to be sent.</param>
/// <exception cref="InvalidOperationException">
/// thrown when Transport is null! Please invoke Connect() first!
/// </exception>
public virtual void SendPacket(AdtsLdapPacket packet)
{
if (this.transportStack == null)
{
throw new InvalidOperationException("Transport is null! Please invoke Connect() first!");
}
this.transportStack.SendPacket(packet);
this.context.MessageId++;
}
internal AdtsLdapPacket CreatePacketFromType(Type messageType)
{
AdtsLdapPacket packet = null;
if (messageType == typeof(AbandonRequest))
{
packet = new AdtsAbandonRequestPacket();
}
else if (messageType == typeof(AddRequest))
{
packet = new AdtsAddRequestPacket();
}
else if (messageType == typeof(AddResponse))
{
packet = new AdtsAddResponsePacket();
}
else if (messageType == typeof(BindRequest))
{
packet = new AdtsBindRequestPacket();
}
else if (messageType == typeof(BindResponse))
{
packet = new AdtsBindResponsePacket();
}
else if (messageType == typeof(CompareRequest))
{
packet = new AdtsCompareRequestPacket();
}
else if (messageType == typeof(CompareResponse))
{
packet = new AdtsCompareResponsePacket();
}
else if (messageType == typeof(DelRequest))
{
packet = new AdtsDelRequestPacket();
}
else if (messageType == typeof(DelResponse))
{
packet = new AdtsDelResponsePacket();
}
else if (messageType == typeof(ExtendedRequest))
{
packet = new AdtsExtendedRequestPacket();
}
else if (messageType == typeof(ExtendedResponse))
{
packet = new AdtsExtendedResponsePacket();
}
else if (messageType == typeof(ModifyDNRequest))
{
packet = new AdtsModifyDnRequestPacket();
}
else if (messageType == typeof(ModifyDNResponse))
{
packet = new AdtsModifyDnResponsePacket();
}
else if (messageType == typeof(ModifyRequest))
{
packet = new AdtsModifyRequestPacket();
}
else if (messageType == typeof(ModifyResponse))
{
packet = new AdtsModifyResponsePacket();
}
else if (messageType == typeof(SearchRequest))
{
packet = new AdtsSearchRequestPacket();
}
else if (messageType == typeof(SearchResultEntry))
{
packet = new AdtsSearchResultEntryPacket();
}
else if (messageType == typeof(SearchResultReference))
{
packet = new AdtsSearchResultReferencePacket();
}
else if (messageType == typeof(SearchResultDone))
{
packet = new AdtsSearchResultDonePacket();
}
else if (messageType == typeof(SicilyBindResponse))
{
packet = new AdtsSicilyBindResponsePacket();
}
else if (messageType == typeof(UnbindRequest))
{
packet = new AdtsUnbindRequestPacket();
}
else
{
throw new StackException("Unknown message type: " + messageType.ToString());
}
return(packet);
}
