#include <SSHLayer.h>

Inheritance diagram for pcpp::SSHHandshakeMessage:

Classes
struct	ssh_message_base

Public Types
enum	SSHHandshakeMessageType { SSH_MSG_KEX_INIT = 20, SSH_MSG_NEW_KEYS = 21, SSH_MSG_KEX_DH_INIT = 30, SSH_MSG_KEX_DH_REPLY = 31, SSH_MSG_KEX_DH_GEX_INIT = 32, SSH_MSG_KEX_DH_GEX_REPLY = 33, SSH_MSG_KEX_DH_GEX_REQUEST = 34, SSH_MSG_UNKNOWN = 999 }

Public Member Functions
SSHHandshakeMessageType	getMessageType () const

std::string	getMessageTypeStr () const

uint8_t *	getSSHHandshakeMessage () const

size_t	getSSHHandshakeMessageLength () const

size_t	getPaddingLength () const

size_t	getHeaderLen () const

std::string	toString () const

Public Member Functions inherited from pcpp::SSHLayer
void	parseNextLayer ()

void	computeCalculateFields ()

OsiModelLayer	getOsiModelLayer () const

Public Member Functions inherited from pcpp::Layer
virtual	~Layer ()

Layer *	getNextLayer () const

Layer *	getPrevLayer () const

ProtocolType	getProtocol () const

uint8_t *	getData () const

size_t	getDataLen () const

uint8_t *	getLayerPayload () const

size_t	getLayerPayloadSize () const

bool	isAllocatedToPacket () const

void	copyData (uint8_t *toArr) const

uint8_t *	getDataPtr (size_t offset=0) const

Static Public Member Functions
static SSHHandshakeMessage *	tryParse (uint8_t data, size_t dataLen, Layer prevLayer, Packet *packet)

Static Public Member Functions inherited from pcpp::SSHLayer
static SSHLayer *	createSSHMessage (uint8_t data, size_t dataLen, Layer prevLayer, Packet *packet)

static bool	isSSHPort (uint16_t portSrc, uint16_t portDst)

Detailed Description

A class representing all of the non-encrypted SSH handshake messages. An handshake message typically has the following structure:

 0         1         2         3         4         5         6
 +---------+---------+---------+---------+---------+---------+-----------     ---------+
 |            Packet Length              | Padding | Message |  Message  ....  Padding |
 |                                       | Length  |  Type   |  Content  ....          |
 +---------------------------------------+---------+---------+-----------     ---------+

The first 4 bytes hold the packet length, followed by 1 byte that holds the padding length (which comes at the end of the message), then 1 byte that holds the message type (which can be of type SSHHandshakeMessage::SSHHandshakeMessageType) and then the message content. At the end of the content there is typically padding.

This class provides access to all of these values. The message content itself is not parse with the exception of SSHKeyExchangeInitMessage which inherits from this class and provides parsing of the Key Exchange Init message.

Member Enumeration Documentation

◆ SSHHandshakeMessageType

enum pcpp::SSHHandshakeMessage::SSHHandshakeMessageType

An enum that represents SSH non-encrypted message types

Enumerator
SSH_MSG_KEX_INIT	Key Exchange Init message
SSH_MSG_NEW_KEYS	New Keys message
SSH_MSG_KEX_DH_INIT	Diffie-Hellman Key Exchange Init message
SSH_MSG_KEX_DH_REPLY	message
SSH_MSG_KEX_DH_GEX_INIT	Diffie-Hellman Group Exchange Init message
SSH_MSG_KEX_DH_GEX_REPLY	"Diffie-Hellman Group Exchange Reply message
SSH_MSG_KEX_DH_GEX_REQUEST	Diffie-Hellman Group Exchange Request message
SSH_MSG_UNKNOWN	Unknown message

Member Function Documentation

◆ getHeaderLen()

size_t pcpp::SSHHandshakeMessage::getHeaderLen ( ) const

virtual

Returns: The size of the SSH handshake message including the padding and message header

Implements pcpp::Layer.

◆ getMessageType()

SSHHandshakeMessageType pcpp::SSHHandshakeMessage::getMessageType ( ) const

Returns: The message type

◆ getMessageTypeStr()

std::string pcpp::SSHHandshakeMessage::getMessageTypeStr ( ) const

Returns: A string representation of the message type

◆ getPaddingLength()

size_t pcpp::SSHHandshakeMessage::getPaddingLength ( ) const

Returns: The padding length in [bytes]

◆ getSSHHandshakeMessage()

uint8_t* pcpp::SSHHandshakeMessage::getSSHHandshakeMessage ( ) const

Returns: A raw byte stream of the message content

◆ getSSHHandshakeMessageLength()

size_t pcpp::SSHHandshakeMessage::getSSHHandshakeMessageLength ( ) const

Returns: The message content length in [bytes] which is calculated by the overall packet length minus the message header (which includes packet length, padding length and message type) and minus the padding bytes

◆ toString()

std::string pcpp::SSHHandshakeMessage::toString ( ) const

virtual

Returns: A string representation of the layer most important data (should look like the layer description in Wireshark)

Implements pcpp::Layer.

◆ tryParse()

static SSHHandshakeMessage* pcpp::SSHHandshakeMessage::tryParse	(	uint8_t *	data,
		size_t	dataLen,
		Layer *	prevLayer,
		Packet *	packet
	)

static

A static method that takes raw packet data and uses some heuristics described in the SSHLayer.h file description to parse it as SSH handshake message instance

Parameters

[in]	data	A pointer to the raw data
[in]	dataLen	Size of the data in bytes
[in]	prevLayer	A pointer to the previous layer
[in]	packet	A pointer to the Packet instance where layer will be stored in

Returns: Upon successful parsing the return value would be an instance of SSHKeyExchangeInitMessage for Key Exchange Init message or SSHHandshakeMessage for any other message type. If parsing fails NULL will be returned

Classes

Public Types

Public Member Functions

Static Public Member Functions