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# Copyright (C) 2017 Open Information Security Foundation
#
# You can copy, redistribute or modify this Program under the terms of
# the GNU General Public License version 2 as published by the Free
# Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# version 2 along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
from __future__ import print_function
import os
import logging
import yaml
from suricata.update import config
from suricata.update import sources
try:
input = raw_input
except:
pass
logger = logging.getLogger()
default_source = "et/open"
def register(parser):
parser.add_argument("name")
parser.add_argument("params", nargs="*", metavar="param=val")
parser.set_defaults(func=enable_source)
def enable_source():
name = config.args().name
update_params = False
# Check if source is already enabled.
enabled_source_filename = sources.get_enabled_source_filename(name)
if os.path.exists(enabled_source_filename):
logger.warning("The source %s is already enabled.", name)
update_params = True
# First check if this source was previous disabled and then just
# re-enable it.
disabled_source_filename = sources.get_disabled_source_filename(name)
if os.path.exists(disabled_source_filename):
logger.info("Re-enabling previously disabled source for %s.", name)
os.rename(disabled_source_filename, enabled_source_filename)
update_params = True
if not os.path.exists(sources.get_index_filename()):
logger.warning("Source index does not exist, will use bundled one.")
logger.warning("Please run suricata-update update-sources.")
source_index = sources.load_source_index(config)
if not name in source_index.get_sources() and not name in sources.get_sources_from_dir():
logger.error("Unknown source: %s", name)
return 1
# Parse key=val options.
opts = {}
for param in config.args().params:
key, val = param.split("=", 1)
opts[key] = val
params = {}
if update_params:
source = yaml.safe_load(open(sources.get_enabled_source_filename(name), "rb"))
else:
source = source_index.get_sources()[name]
if "params" in source:
params = source["params"]
for old_param in source["params"]:
if old_param in opts and source["params"][old_param] != opts[old_param]:
logger.info("Updating source parameter '%s': '%s' -> '%s'." % (
old_param, source["params"][old_param], opts[old_param]))
params[old_param] = opts[old_param]
if "subscribe-url" in source:
print("The source %s requires a subscription. Subscribe here:" % (name))
print(" %s" % source["subscribe-url"])
if "parameters" in source:
for param in source["parameters"]:
if param in opts:
params[param] = opts[param]
else:
prompt = source["parameters"][param]["prompt"]
while True:
r = input("%s (%s): " % (prompt, param))
r = r.strip()
if r:
break
params[param] = r.strip()
if "checksum" in source:
checksum = source["checksum"]
else:
checksum = source.get("checksum", True)
new_source = sources.SourceConfiguration(
name, params=params, checksum=checksum)
# If the source directory does not exist, create it. Also create
# the default rule-source of et/open, unless the source being
# enabled replaces it.
source_directory = sources.get_source_directory()
if not os.path.exists(source_directory):
try:
logger.info("Creating directory %s", source_directory)
os.makedirs(source_directory)
except Exception as err:
logger.error(
"Failed to create directory %s: %s", source_directory, err)
return 1
if "replaces" in source and default_source in source["replaces"]:
logger.debug(
"Not enabling default source as selected source replaces it")
elif new_source.name == default_source:
logger.debug(
"Not enabling default source as selected source is the default")
else:
logger.info("Enabling default source %s", default_source)
if not source_index.get_source_by_name(default_source):
logger.error("Default source %s not in index", default_source)
else:
default_source_config = sources.SourceConfiguration(
default_source)
write_source_config(default_source_config, True)
write_source_config(new_source, True)
logger.info("Source %s enabled", new_source.name)
if "replaces" in source:
for replaces in source["replaces"]:
filename = sources.get_enabled_source_filename(replaces)
if os.path.exists(filename):
logger.info(
"Removing source %s as its replaced by %s", replaces,
new_source.name)
logger.debug("Deleting %s", filename)
os.unlink(filename)
def write_source_config(config, enabled):
if enabled:
filename = sources.get_enabled_source_filename(config.name)
else:
filename = sources.get_disabled_source_filename(config.name)
with open(filename, "w") as fileobj:
logger.debug("Writing %s", filename)
fileobj.write(yaml.safe_dump(config.dict(), default_flow_style=False))
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