Server SSH

Server-side settings for SSH connections. More...

Collaboration diagram for Server SSH:

Typedefs
typedef int(*	nc_server_ssh_interactive_auth_clb )(const struct nc_session *session, ssh_session ssh_sess, ssh_message msg, void *user_data)
	Keyboard interactive authentication callback. More...

Functions
int	nc_server_ssh_kbdint_get_nanswers (const struct nc_session *session, ssh_session libssh_session)
	Get the number of answers to Keyboard interactive authentication prompts. More...
int	nc_server_ssh_set_authkey_path_format (const char *path)
	Set the format of the path to authorized_keys files. More...
void	nc_server_ssh_set_interactive_auth_clb (nc_server_ssh_interactive_auth_clb auth_clb, void *user_data, void(*free_user_data)(void *user_data))
	Set the callback for SSH interactive authentication. More...
int	nc_server_ssh_set_pam_conf_filename (const char *filename)
	Set the name of the PAM configuration file. More...

Detailed Description

Server-side settings for SSH connections.

Typedef Documentation

typedef int(* nc_server_ssh_interactive_auth_clb)(const struct nc_session *session, ssh_session ssh_sess, ssh_message msg, void *user_data)

Keyboard interactive authentication callback.

The callback has to handle sending interactive challenges and receiving responses by itself. An example callback may fit the following description: Prepare all prompts for the user and send them via ssh_message_auth_interactive_request(). Get the answers either by calling ssh_message_get() or nc_server_ssh_kbdint_get_nanswers(). Return value based on your authentication logic and user answers retrieved by calling ssh_userauth_kbdint_getanswer().

Parameters

[in]	session	NETCONF session.
[in]	ssh_sess	libssh session.
[in]	msg	SSH message that contains the interactive request and which expects a reply with prompts.
[in]	user_data	Arbitrary user data.

Returns

0 for successful authentication, non-zero to deny the user.

Definition at line 514 of file session_server.h.

Function Documentation

int nc_server_ssh_set_authkey_path_format

(

const char *

path

)

Set the format of the path to authorized_keys files.

This path format will be set globally for all clients wishing to authenticate via the SSH Public Key system authentication.

Parameters

[in]

path

Path to authorized_keys files. The path may contain the following tokens: u - replaced by the username of the user trying to authenticate, h - replaced by the home directory of the user trying to authenticate, U - replaced by the UID of the user trying to authenticate, %% - a literal ''.

Returns

0 on success, 1 on error.

void nc_server_ssh_set_interactive_auth_clb	(	nc_server_ssh_interactive_auth_clb	auth_clb,
		void *	user_data,
		void(*)(void *user_data)	free_user_data
	)

Set the callback for SSH interactive authentication.

Parameters

[in]	auth_clb	Keyboard interactive authentication callback. This callback is only called once per authentication.
[in]	user_data	Optional arbitrary user data that will be passed to interactive_auth_clb.
[in]	free_user_data	Optional callback that will be called during cleanup to free any user_data.

int nc_server_ssh_kbdint_get_nanswers	(	const struct nc_session *	session,
		ssh_session	libssh_session
	)

Get the number of answers to Keyboard interactive authentication prompts.

The actual answers can later be retrieved by calling ssh_userauth_kbdint_getanswer() on the libssh_session.

Parameters

[in]	session	NETCONF session.
[in]	libssh_session	libssh session.

Returns

Non-negative number of answers on success, -1 on configurable authentication timeout, disconnect or other error.

int nc_server_ssh_set_pam_conf_filename

(

const char *

filename

)

Set the name of the PAM configuration file.

This filename will be set globally for all clients wishing to authenticate via the SSH Keyboard Interactive authentication method.

Parameters

[in]

filename

Name of the PAM configuration file. The file needs to be located in the default PAM directory (usually /etc/pam.d/).

Returns

0 on success, 1 on error.