/// <summary>
/// Build a Smb2Packet from a byte array
/// </summary>
/// <param name="data">The byte array</param>
/// <param name="consumedLen">The consumed data length</param>
/// <param name="expectedLen">The expected data length</param>
internal override void FromBytes(byte[] data, out int consumedLen, out int expectedLen)
{
consumedLen = 0;
this.NegotiateContext_ENCRYPTION = null;
this.NegotiateContext_PREAUTH = null;
this.Header = TypeMarshal.ToStruct <Packet_Header>(data, ref consumedLen);
byte[] tempData = data.Skip(consumedLen).ToArray();
this.PayLoad = Smb2Utility.UnmarshalStructure <NEGOTIATE_Response>(tempData);
consumedLen += Marshal.SizeOf(this.PayLoad);
if (this.PayLoad.SecurityBufferLength > 0)
{
this.Buffer = data.Skip(this.PayLoad.SecurityBufferOffset).Take(this.PayLoad.SecurityBufferLength).ToArray();
consumedLen += this.Buffer.Length;
}
while (data.Length > consumedLen)
{
// Skip padding
int paddingLen = 8 - (consumedLen) % 8;
if (paddingLen != 8)
{
if (data.Length - consumedLen <= paddingLen)
{
break;
}
consumedLen += paddingLen;
}
if (data.Length - consumedLen < 8)
{
break;
}
SMB2_NEGOTIATE_CONTEXT_Type_Values contextType = (SMB2_NEGOTIATE_CONTEXT_Type_Values)BitConverter.ToUInt16(data, consumedLen);
if (contextType == SMB2_NEGOTIATE_CONTEXT_Type_Values.SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
{
if (this.NegotiateContext_PREAUTH != null)
{
throw new Exception("More than one SMB2_PREAUTH_INTEGRITY_CAPABILITIES are present.");
}
this.NegotiateContext_PREAUTH = TypeMarshal.ToStruct <SMB2_PREAUTH_INTEGRITY_CAPABILITIES>(data, ref consumedLen);
}
else if (contextType == SMB2_NEGOTIATE_CONTEXT_Type_Values.SMB2_ENCRYPTION_CAPABILITIES)
{
if (this.NegotiateContext_ENCRYPTION != null)
{
throw new Exception("More than one SMB2_ENCRYPTION_CAPABILITIES are present.");
}
this.NegotiateContext_ENCRYPTION = TypeMarshal.ToStruct <SMB2_ENCRYPTION_CAPABILITIES>(data, ref consumedLen);
}
else
{
throw new Exception(string.Format("Unknow Negotiate Context: {0}.", (ushort)contextType));
}
}
expectedLen = 0;
}
/// <summary>
/// Build a Smb2Packet from a byte array
/// </summary>
/// <param name="data">The byte array</param>
/// <param name="consumedLen">The consumed data length</param>
/// <param name="expectedLen">The expected data length</param>
internal override void FromBytes(byte[] data, out int consumedLen, out int expectedLen)
{
consumedLen = 0;
this.Header = TypeMarshal.ToStruct <Packet_Header>(data, ref consumedLen);
byte[] tempData = data.Skip(consumedLen).ToArray();
this.PayLoad = Smb2Utility.UnmarshalStructure <NEGOTIATE_Request>(tempData);
consumedLen += Marshal.SizeOf(this.PayLoad);
this.Buffer = data.Skip(consumedLen).ToArray(); //Dialects + Padding + NegotiateContextList
if (PayLoad.DialectCount > 0)
{
this.Dialects = Smb2Utility.UnmarshalStructArray <DialectRevision>(Buffer, PayLoad.DialectCount);
consumedLen += PayLoad.DialectCount * sizeof(DialectRevision);
}
while (data.Length > consumedLen)
{
// Skip padding
int paddingLen = 8 - (consumedLen) % 8;
if (paddingLen != 8)
{
if (data.Length - consumedLen <= paddingLen)
{
break;
}
consumedLen += paddingLen;
}
if (data.Length - consumedLen < 8)
{
break;
}
SMB2_NEGOTIATE_CONTEXT_Type_Values contextType = (SMB2_NEGOTIATE_CONTEXT_Type_Values)BitConverter.ToUInt16(data, consumedLen);
if (contextType == SMB2_NEGOTIATE_CONTEXT_Type_Values.SMB2_PREAUTH_INTEGRITY_CAPABILITIES)
{
this.NegotiateContext_PREAUTH = TypeMarshal.ToStruct <SMB2_PREAUTH_INTEGRITY_CAPABILITIES>(data, ref consumedLen);
}
else if (contextType == SMB2_NEGOTIATE_CONTEXT_Type_Values.SMB2_ENCRYPTION_CAPABILITIES)
{
this.NegotiateContext_ENCRYPTION = TypeMarshal.ToStruct <SMB2_ENCRYPTION_CAPABILITIES>(data, ref consumedLen);
}
else if (contextType == SMB2_NEGOTIATE_CONTEXT_Type_Values.SMB2_COMPRESSION_CAPABILITIES)
{
this.NegotiateContext_COMPRESSION = TypeMarshal.ToStruct <SMB2_COMPRESSION_CAPABILITIES>(data, ref consumedLen);
}
else if (contextType == SMB2_NEGOTIATE_CONTEXT_Type_Values.SMB2_NETNAME_NEGOTIATE_CONTEXT_ID)
{
this.NegotiateContext_NETNAME = SMB2_NETNAME_NEGOTIATE_CONTEXT_ID.Unmarshal(data, ref consumedLen);
}
}
expectedLen = 0;
}
