Function libssh2_sys::libssh2_userauth_publickey_fromfile_ex

pub unsafe extern "C" fn libssh2_userauth_publickey_fromfile_ex(
    sess: *mut LIBSSH2_SESSION, 
    username: *const c_char, 
    username_len: c_uint, 
    publickey: *const c_char, 
    privatekey: *const c_char, 
    passphrase: *const c_char
) -> c_int