libssh2_userauth_list - list the authentication methods supported by a
char * libssh2_userauth_list(LIBSSH2_SESSION *session, const char
*username, unsigned int username_len);
session - Session instance as returned by libssh2_session_init_ex(3)
username - Username which will be used while authenticating. Note that
most server implementations do not permit attempting authentication
with different usernames between requests. Therefore this must be the
same username you will use on later userauth calls.
username_len - Length of username parameter.
Send a SSH_USERAUTH_NONE request to the remote host. Unless the remote
host is configured to accept none as a viable authentication scheme
(unlikely), it will return SSH_USERAUTH_FAILURE along with a listing of
what authentication schemes it does support. In the unlikely event that
none authentication succeeds, this method with return NULL. This case
may be distinguished from faily by examining
On success a comma delimited list of supported authentication schemes.
This list is internally managed by libssh2. On failure ruturns NULL.
LIBSSH2_ERROR_ALLOC - An internal memory allocation call failed.
LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.
LIBSSH2_ERROR_EAGAIN - Marked for non-blocking I/O but the call