120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/*
|
|
* Copyright (C) 2013 Glyptodon LLC
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
|
|
#ifndef _GUAC_SSH_AGENT_H
|
|
#define _GUAC_SSH_AGENT_H
|
|
|
|
#include "config.h"
|
|
|
|
#include "ssh_key.h"
|
|
|
|
/**
|
|
* Packet type of an agent identity request.
|
|
*/
|
|
#define SSH2_AGENT_REQUEST_IDENTITIES 0x0B
|
|
|
|
/**
|
|
* Packet type of an agent identity response.
|
|
*/
|
|
#define SSH2_AGENT_IDENTITIES_ANSWER 0x0C
|
|
|
|
/**
|
|
* Packet type of an agent sign request.
|
|
*/
|
|
#define SSH2_AGENT_SIGN_REQUEST 0x0D
|
|
|
|
/**
|
|
* Packet type of an agent sign response.
|
|
*/
|
|
#define SSH2_AGENT_SIGN_RESPONSE 0x0E
|
|
|
|
/**
|
|
* The comment to associate with public keys when listed.
|
|
*/
|
|
#define SSH_AGENT_COMMENT "Guacamole SSH Agent"
|
|
|
|
/**
|
|
* The packet sent by the SSH agent when an operation is not supported.
|
|
*/
|
|
#define UNSUPPORTED "\x00\x00\x00\x0C\x05Unsupported"
|
|
|
|
/**
|
|
* Data representing an SSH auth agent.
|
|
*/
|
|
typedef struct ssh_auth_agent {
|
|
|
|
/**
|
|
* The SSH channel being used for SSH agent protocol.
|
|
*/
|
|
LIBSSH2_CHANNEL* channel;
|
|
|
|
/**
|
|
* The single private key to use for authentication.
|
|
*/
|
|
ssh_key* identity;
|
|
|
|
/**
|
|
* Data read from the agent channel.
|
|
*/
|
|
char buffer[4096];
|
|
|
|
/**
|
|
* The number of bytes of data currently stored in the buffer.
|
|
*/
|
|
int buffer_length;
|
|
|
|
} ssh_auth_agent;
|
|
|
|
/**
|
|
* Handler for an agent sign request.
|
|
*/
|
|
void ssh_auth_agent_sign(ssh_auth_agent* auth_agent,
|
|
char* data, int data_length);
|
|
|
|
/**
|
|
* Handler for an agent identity request.
|
|
*/
|
|
void ssh_auth_agent_list_identities(ssh_auth_agent* auth_agent);
|
|
|
|
/**
|
|
* Generic handler for all packets received over the auth agent channel.
|
|
*/
|
|
void ssh_auth_agent_handle_packet(ssh_auth_agent* auth_agent,
|
|
uint8_t type, char* data, int data_length);
|
|
|
|
/**
|
|
* Reads and handles a single packet from the SSH agent channel associated
|
|
* with the given ssh_auth_agent, returning the size of that packet, the size
|
|
* of the partial packet read, or a negative value if an error occurs.
|
|
*/
|
|
int ssh_auth_agent_read(ssh_auth_agent* auth_agent);
|
|
|
|
/**
|
|
* Libssh2 callback, invoked when the auth agent channel is opened.
|
|
*/
|
|
void ssh_auth_agent_callback(LIBSSH2_SESSION *session,
|
|
LIBSSH2_CHANNEL *channel, void **abstract);
|
|
|
|
#endif
|
|
|