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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2މ$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ# Copyright (C) 2011 Canonical Ltd. # Copyright (C) 2012 Hewlett-Packard Development Company, L.P. # # Author: Scott Moser # Author: Juerg Haefliger # # This file is part of cloud-init. See LICENSE file for license information. """Keys to Console: Control which SSH host keys may be written to console""" import os from logging import Logger from textwrap import dedent from cloudinit import subp, util from cloudinit.cloud import Cloud from cloudinit.config import Config from cloudinit.config.schema import MetaSchema, get_meta_doc from cloudinit.settings import PER_INSTANCE # This is a tool that cloud init provides HELPER_TOOL_TPL = "%s/cloud-init/write-ssh-key-fingerprints" distros = ["all"] meta: MetaSchema = { "id": "cc_keys_to_console", "name": "Keys to Console", "title": "Control which SSH host keys may be written to console", "description": ( "For security reasons it may be desirable not to write SSH host keys" " and their fingerprints to the console. To avoid either being written" " to the console the ``emit_keys_to_console`` config key under the" " main ``ssh`` config key can be used. To avoid the fingerprint of" " types of SSH host keys being written to console the" " ``ssh_fp_console_blacklist`` config key can be used. By default," " all types of keys will have their fingerprints written to console." " To avoid host keys of a key type being written to console the" "``ssh_key_console_blacklist`` config key can be used. By default," " ``ssh-dss`` host keys are not written to console." ), "distros": distros, "examples": [ dedent( """\ # Do not print any SSH keys to system console ssh: emit_keys_to_console: false """ ), dedent( """\ # Do not print certain ssh key types to console ssh_key_console_blacklist: [dsa, ssh-dss] """ ), dedent( """\ # Do not print specific ssh key fingerprints to console ssh_fp_console_blacklist: - E25451E0221B5773DEBFF178ECDACB160995AA89 - FE76292D55E8B28EE6DB2B34B2D8A784F8C0AAB0 """ ), ], "frequency": PER_INSTANCE, "activate_by_schema_keys": [], } __doc__ = get_meta_doc(meta) def _get_helper_tool_path(distro): try: base_lib = distro.usr_lib_exec except AttributeError: base_lib = "/usr/lib" return HELPER_TOOL_TPL % base_lib def handle( name: str, cfg: Config, cloud: Cloud, log: Logger, args: list ) -> None: if util.is_false(cfg.get("ssh", {}).get("emit_keys_to_console", True)): log.debug( "Skipping module named %s, logging of SSH host keys disabled", name ) return helper_path = _get_helper_tool_path(cloud.distro) if not os.path.exists(helper_path): log.warning( "Unable to activate module %s, helper tool not found at %s", name, helper_path, ) return fp_blacklist = util.get_cfg_option_list( cfg, "ssh_fp_console_blacklist", [] ) key_blacklist = util.get_cfg_option_list( cfg, "ssh_key_console_blacklist", ["ssh-dss"] ) try: cmd = [helper_path, ",".join(fp_blacklist), ",".join(key_blacklist)] (stdout, _stderr) = subp.subp(cmd) util.multi_log("%s\n" % (stdout.strip()), stderr=False, console=True) except Exception: log.warning("Writing keys to the system console failed!") raise # vi: ts=4 expandtab