SMB2/SessionSetup

Opcode 0x01

This SMB2 command is to authenticate a user and get a UserID assigned. This command is often the very first command issued from a client after the SMB2/NegotiateProtocol phase has completed.

SMB2/SessionSetup Request

SMB2/SessionSetup Request Packet Format

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|         Buffer Code           |            Padding            |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|               |               |               |               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|               |               |               |               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|        Sec Blob Offset        |        Sec Blob Length        |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Sec Blob
+-+-+-+-+...

Buffer Code

SMB2/BufferCode

Sec Blob Offset

This is the offset in bytes of the security blob, starting from the start of the SMB2/Header.

Sec Blob Length

This is the number of bytes for the security blob.

Sec Blob

This is the ASN.1/DER encoded security blob.

SMB2/SessionSetup Response

SMB2/SessionSetup Response Packet Format

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|          Buffer Code          |           Padding             |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|        Sec Blob Offset        |        Sec Blob Length        |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Sec Blob
+-+-+-+-+...

Buffer Code

SMB2/BufferCode

Sec Blob Offset

This is the offset in bytes of the security blob, starting from the start of the SMB2/Header.

Sec Blob Length

This is the number of bytes for the security blob.

Sec Blob

This is the ASN.1/DER encoded security blob.

NT Status Codes

Discussion