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suricata_config_populate.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright (c) 2022 Battelle Energy Alliance, LLC. All rights reserved.
# modify suricata.yaml according to many environment variables
#
# suricata.yaml: https://suricata.readthedocs.io/en/suricata-6.0.5/configuration/suricata-yaml.html
# https://github.com/OISF/suricata/blob/master/suricata.yaml.in
#
#
import argparse
import contextlib
import fnmatch
import logging
import os
import sys
import time
import tempfile
from collections import defaultdict, namedtuple
from collections.abc import Iterable
from io import StringIO
from ruamel.yaml import YAML
from shutil import move as MoveFile, copyfile as CopyFile
from subprocess import PIPE, Popen
###################################################################################################
args = None
script_return_code = 0
script_name = os.path.basename(__file__)
script_path = os.path.dirname(os.path.realpath(__file__))
orig_path = os.getcwd()
###################################################################################################
YAML_VERSION = (1, 1)
BACKUP_FILES_MAX = 10
###################################################################################################
def val2bool(v):
try:
if v is None:
return False
elif isinstance(v, bool):
return v
elif isinstance(v, str):
if v.lower() in ("yes", "true", "t", "y"):
return True
elif v.lower() in ("no", "false", "f", "n"):
return False
else:
raise ValueError(f'Boolean value expected (got {v})')
else:
raise ValueError(f'Boolean value expected (got {v})')
except:
# just pitch it back and let the caller worry about it
return v
###################################################################################################
@contextlib.contextmanager
def pushd(directory):
prevDir = os.getcwd()
os.chdir(directory)
try:
yield
finally:
os.chdir(prevDir)
###################################################################################################
def get_iterable(x):
if isinstance(x, Iterable) and not isinstance(x, str):
return x
else:
return (x,)
###################################################################################################
def deep_get(d, keys, default=None):
k = get_iterable(keys)
if d is None:
return default
if not keys:
return d
return deep_get(d.get(k[0]), k[1:], default)
###################################################################################################
def deep_set(d, keys, value, deleteIfNone=False):
k = get_iterable(keys)
for key in k[:-1]:
if (key not in d) or (not isinstance(d[key], dict)):
d[key] = dict()
d = d[key]
d[k[-1]] = value
if (deleteIfNone == True) and (value is None):
d.pop(k[-1], None)
###################################################################################################
# run command with arguments and return its exit code, stdout, and stderr
def check_output_input(*popenargs, **kwargs):
if 'stdout' in kwargs:
raise ValueError('stdout argument not allowed, it will be overridden')
if 'stderr' in kwargs:
raise ValueError('stderr argument not allowed, it will be overridden')
if 'input' in kwargs and kwargs['input']:
if 'stdin' in kwargs:
raise ValueError('stdin and input arguments may not both be used')
inputdata = kwargs['input']
kwargs['stdin'] = PIPE
else:
inputdata = None
kwargs.pop('input', None)
process = Popen(*popenargs, stdout=PIPE, stderr=PIPE, **kwargs)
try:
output, errput = process.communicate(input=inputdata)
except:
process.kill()
process.wait()
raise
retcode = process.poll()
return retcode, output, errput
###################################################################################################
# run command with arguments and return its exit code and output
def run_process(command, stdout=True, stderr=True, stdin=None, cwd=None, env=None):
retcode = -1
output = []
try:
# run the command
retcode, cmdout, cmderr = check_output_input(command, input=stdin.encode() if stdin else None, cwd=cwd, env=env)
# split the output on newlines to return a list
if stderr and (len(cmderr) > 0):
output.extend(cmderr.decode(sys.getdefaultencoding()).split('\n'))
if stdout and (len(cmdout) > 0):
output.extend(cmdout.decode(sys.getdefaultencoding()).split('\n'))
except (FileNotFoundError, OSError, IOError) as e:
if stderr:
output.append("Command {} not found or unable to execute".format(command))
logging.debug(
"{}{} returned {}: {}".format(
command, "({})".format(stdin[:80] + bool(stdin[80:]) * '...' if stdin else ""), retcode, output
)
)
return retcode, output
###################################################################################################
# run command with arguments and return its exit code and output
class NullRepresenter:
def __call__(self, repr, data):
ret_val = repr.represent_scalar(u'tag:yaml.org,2002:null', u'')
return ret_val
###################################################################################################
def ObjToYamlStrLines(obj, options=None):
outputStr = None
if options == None:
options = {}
yaml = YAML()
yaml.preserve_quotes = False
yaml.representer.ignore_aliases = lambda x: True
yaml.representer.add_representer(type(None), NullRepresenter())
yaml.boolean_representation = ['no', 'yes']
yaml.version = YAML_VERSION
with StringIO() as stringStream:
yaml.dump(obj, stringStream, **options)
outputStr = stringStream.getvalue()
return outputStr.splitlines()
###################################################################################################
DEFAULT_VARS = defaultdict(lambda: None)
DEFAULT_VARS.update(
{
'AF_PACKET_BLOCK_SIZE': 32768,
'AF_PACKET_BLOCK_TIMEOUT': 10,
'AF_PACKET_BUFFER_SIZE': 32768,
'AF_PACKET_CHECKSUM_CHECKS': 'kernel',
'AF_PACKET_CLUSTER_TYPE': 'cluster_flow',
'AF_PACKET_DEFRAG': True,
'AF_PACKET_EMERGENCY_FLUSH': False,
'AF_PACKET_IFACE_THREADS': 'auto',
'AF_PACKET_MMAP_LOCKED': False,
'AF_PACKET_RING_SIZE': 2048,
'AF_PACKET_TPACKET_V3': True,
'AF_PACKET_USE_MMAP': True,
'ANOMALY_APPLAYER': True,
'ANOMALY_DECODE': False,
'ANOMALY_ENABLED': False,
'ANOMALY_EVE_ENABLED': False,
'ANOMALY_PACKETHDR': False,
'ANOMALY_STREAM': False,
'ASN1_MAX_FRAMES': 256,
'AUTOFP_SCHEDULER': 'hash',
'CAPTURE_CHECKSUM_VALIDATION': 'none',
'CAPTURE_DISABLE_OFFLOADING': True,
'CUSTOM_RULES_ONLY': False,
'DCERPC_ENABLED': True,
'DCERPC_EVE_ENABLED': False,
'DEFRAG_HASH_SIZE': 65536,
'DEFRAG_MAX_FRAGS': 65535,
'DEFRAG_MEMCAP': '32mb',
'DEFRAG_PREALLOC': True,
'DEFRAG_TIMEOUT': 60,
'DEFRAG_TRACKERS': 65535,
'DHCP_ENABLED': True,
'DHCP_EVE_ENABLED': False,
'DHCP_EXTENDED': False,
'DNP3_ENABLED': True,
'DNP3_EVE_ENABLED': False,
'DNP3_PORTS': 20000,
'DNS_ENABLED': True,
'DNS_EVE_ENABLED': False,
'DNS_PORTS': 53,
'DNS_REQUESTS': True,
'DNS_RESPONSES': True,
'DNS_VERSION': 2,
'ENIP_ENABLED': True,
'ENIP_EVE_ENABLED': False,
'ENIP_PORTS': 44818,
'EXTERNAL_NET': '!$HOME_NET',
'FILE_DATA_PORTS': "[$HTTP_PORTS,110,143]",
'FILES_ENABLED': True,
'FILES_EVE_ENABLED': False,
'FILES_FORCE_MAGIC': False,
'FLOW_EMERGENCY_RECOVERY': 30,
'FLOW_ENABLED': False,
'FLOW_EVE_ENABLED': False,
'FLOW_HASH_SIZE': 65536,
'FLOW_MEMCAP': '128mb',
'FLOW_PREALLOC': 10000,
'FTP_ENABLED': True,
'FTP_EVE_ENABLED': False,
'FTP_MEMCAP': '64mb',
'FTP_PORTS': 21,
'GENEVE_ENABLED': False,
'GENEVE_EVE_ENABLED': False,
'GENEVE_PORTS': 6081,
'HOME_NET': "[192.168.0.0/16,10.0.0.0/8,172.16.0.0/12]",
'HOST_HASH_SIZE': 4096,
'HOST_MEMCAP': '32mb',
'HOST_PREALLOC': 1000,
'HTTP2_ENABLED': False,
'HTTP2_EVE_ENABLED': False,
'HTTP_ENABLED': True,
'HTTP_EVE_ENABLED': False,
'HTTP_EXTENDED': False,
'HTTP_PORTS': 80,
'IKEV2_ENABLED': True,
'IKEV2_EVE_ENABLED': False,
'IMAP_ENABLED': 'detection-only',
'IMAP_EVE_ENABLED': False,
'KRB5_ENABLED': True,
'KRB5_EVE_ENABLED': False,
'MANAGED_RULES_DIR': '/var/lib/suricata/rules',
'MODBUS_ENABLED': True,
'MODBUS_EVE_ENABLED': False,
'MODBUS_PORTS': 502,
'MODBUS_STREAM_DEPTH': 0,
'MQTT_ENABLED': True,
'MQTT_EVE_ENABLED': False,
'MQTT_MAX_MSG_LENGTH': '1mb',
'MQTT_PASSWORDS': False,
'NETFLOW_ENABLED': False,
'NETFLOW_EVE_ENABLED': False,
'NFS_ENABLED': True,
'NFS_EVE_ENABLED': False,
'NTP_ENABLED': True,
'NTP_EVE_ENABLED': False,
'ORACLE_PORTS': 1521,
'PACKET_SIZE': 1514,
'PCRE_MATCH_LIMIT': 3500,
'PCRE_RECURSION': 1500,
'RDP_ENABLED': True,
'RDP_EVE_ENABLED': False,
'RFB_ENABLED': True,
'RFB_EVE_ENABLED': False,
'RFB_PORTS': "[5900,5901,5902,5903,5904,5905,5906,5907,5908,5909]",
'RUNMODE': 'autofp',
'RUN_DIR': os.path.join(os.getenv('SUPERVISOR_PATH', '/var/run'), 'suricata'),
'SHELLCODE_PORTS': '!80',
'SIP_ENABLED': True,
'SIP_EVE_ENABLED': False,
'SMB_ENABLED': True,
'SMB_EVE_ENABLED': False,
'SMB_PORTS': "[139,445]",
'SMB_STREAM_DEPTH': 0,
'SMTP_BODY_MD5': False,
'SMTP_DECODE_BASE64': False,
'SMTP_DECODE_MIME': False,
'SMTP_DECODE_QUOTED_PRINTABLE': False,
'SMTP_ENABLED': True,
'SMTP_EVE_ENABLED': False,
'SMTP_EXTENDED': False,
'SMTP_EXTRACT_URLS': True,
'SMTP_HEADER_VALUE_DEPTH': 2000,
'SMTP_INSPECTED_TRACKER_CONTENT_INSPECT_MIN_SIZE': 32768,
'SMTP_INSPECTED_TRACKER_CONTENT_INSPECT_WINDOW': 4096,
'SMTP_INSPECTED_TRACKER_CONTENT_LIMIT': 100000,
'SMTP_RAW_EXTRACTION': False,
'SNMP_ENABLED': True,
'SNMP_EVE_ENABLED': False,
'SSH_ENABLED': True,
'SSH_EVE_ENABLED': False,
'SSH_HASSH': True,
'SSH_PORTS': 22,
'STREAM_CHECKSUM_VALIDATION': False,
'STREAM_INLINE': 'auto',
'STREAM_MEMCAP': '64mb',
'STREAM_REASSEMBLY_DEPTH': '1mb',
'STREAM_REASSEMBLY_MEMCAP': '256mb',
'STREAM_REASSEMBLY_RANDOMIZE_CHUNK_SIZE': True,
'STREAM_REASSEMBLY_TOCLIENT_CHUNK_SIZE': 2560,
'STREAM_REASSEMBLY_TOSERVER_CHUNK_SIZE': 2560,
'TEREDO_ENABLED': True,
'TEREDO_EVE_ENABLED': False,
'TEREDO_PORTS': 3544,
'TEST_CONFIG_VERBOSITY': '',
'TFTP_ENABLED': True,
'TFTP_EVE_ENABLED': False,
'TLS_ENABLED': True,
'TLS_EVE_ENABLED': False,
'TLS_ENCRYPTION_HANDLING': 'bypass',
'TLS_EXTENDED': False,
'TLS_JA3': 'auto',
'TLS_PORTS': 443,
'TLS_SESSION_RESUMPTION': False,
'VLAN_USE_FOR_TRACKING': True,
'VXLAN_ENABLED': True,
'VXLAN_EVE_ENABLED': False,
'VXLAN_PORTS': 4789,
}
)
for varName, varVal in [
(key.upper(), value)
for key, value in os.environ.items()
if key.upper().startswith('SURICATA')
or key.upper() in ('CAPTURE_INTERFACE', 'CAPTURE_FILTER', 'PCAP_IFACE', 'PCAP_FILTER', 'SUPERVISOR_PATH')
]:
tmpYaml = YAML(typ='safe')
newVal = tmpYaml.load(varVal)
if isinstance(newVal, str):
if (newVal.lower() == 'yes') or (newVal.lower() == 'true'):
newVal = True
elif (newVal.lower() == 'no') or (newVal.lower() == 'false'):
newVal = False
DEFAULT_VARS[varName.removeprefix("SURICATA_")] = newVal
###################################################################################################
ProtocolConfig = namedtuple(
"ProtocolConfig", ["subs", "enabled", "eve_enabled", "in_eve", "destination_ports", "source_ports"], rename=False
)
PROTOCOL_CONFIGS = defaultdict(
lambda: ProtocolConfig(
[],
True,
False,
True,
None,
None,
)
)
PROTOCOL_CONFIGS.update(
{
'anomaly': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['ANOMALY_ENABLED']),
val2bool(DEFAULT_VARS['ANOMALY_EVE_ENABLED']),
True,
None,
None,
),
'dcerpc': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['DCERPC_ENABLED']),
val2bool(DEFAULT_VARS['DCERPC_EVE_ENABLED']),
True,
None,
None,
),
'dhcp': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['DHCP_ENABLED']),
val2bool(DEFAULT_VARS['DHCP_EVE_ENABLED']),
True,
None,
None,
),
'dnp3': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['DNP3_ENABLED']),
val2bool(DEFAULT_VARS['DNP3_EVE_ENABLED']),
True,
DEFAULT_VARS['DNP3_PORTS'],
None,
),
'dns': ProtocolConfig(
['tcp', 'udp'],
val2bool(DEFAULT_VARS['DNS_ENABLED']),
val2bool(DEFAULT_VARS['DNS_EVE_ENABLED']),
True,
DEFAULT_VARS['DNS_PORTS'],
None,
),
'enip': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['ENIP_ENABLED']),
val2bool(DEFAULT_VARS['ENIP_EVE_ENABLED']),
False,
DEFAULT_VARS['ENIP_PORTS'],
DEFAULT_VARS['ENIP_PORTS'],
),
'files': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['FILES_ENABLED']),
val2bool(DEFAULT_VARS['FILES_EVE_ENABLED']),
True,
None,
None,
),
'flow': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['FLOW_ENABLED']),
val2bool(DEFAULT_VARS['FLOW_EVE_ENABLED']),
True,
None,
None,
),
'ftp': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['FTP_ENABLED']),
val2bool(DEFAULT_VARS['FTP_EVE_ENABLED']),
True,
None,
None,
),
'http2': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['HTTP2_ENABLED']),
val2bool(DEFAULT_VARS['HTTP2_EVE_ENABLED']),
True,
None,
None,
),
'http': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['HTTP_ENABLED']),
val2bool(DEFAULT_VARS['HTTP_EVE_ENABLED']),
True,
None,
None,
),
'ikev2': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['IKEV2_ENABLED']),
val2bool(DEFAULT_VARS['IKEV2_EVE_ENABLED']),
True,
None,
None,
),
'imap': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['IMAP_ENABLED']),
val2bool(DEFAULT_VARS['IMAP_EVE_ENABLED']),
False,
None,
None,
),
'krb5': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['KRB5_ENABLED']),
val2bool(DEFAULT_VARS['KRB5_EVE_ENABLED']),
True,
None,
None,
),
'modbus': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['MODBUS_ENABLED']),
val2bool(DEFAULT_VARS['MODBUS_EVE_ENABLED']),
False,
DEFAULT_VARS['MODBUS_PORTS'],
None,
),
'mqtt': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['MQTT_ENABLED']),
val2bool(DEFAULT_VARS['MQTT_EVE_ENABLED']),
True,
None,
None,
),
'netflow': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['NETFLOW_ENABLED']),
val2bool(DEFAULT_VARS['NETFLOW_EVE_ENABLED']),
True,
None,
None,
),
'nfs': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['NFS_ENABLED']),
val2bool(DEFAULT_VARS['NFS_EVE_ENABLED']),
True,
None,
None,
),
'ntp': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['NTP_ENABLED']),
val2bool(DEFAULT_VARS['NTP_EVE_ENABLED']),
False,
None,
None,
),
'rdp': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['RDP_ENABLED']),
val2bool(DEFAULT_VARS['RDP_EVE_ENABLED']),
True,
None,
None,
),
'rfb': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['RFB_ENABLED']),
val2bool(DEFAULT_VARS['RFB_EVE_ENABLED']),
True,
DEFAULT_VARS['RFB_PORTS'],
None,
),
'sip': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['SIP_ENABLED']),
val2bool(DEFAULT_VARS['SIP_EVE_ENABLED']),
True,
None,
None,
),
'smb': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['SMB_ENABLED']),
val2bool(DEFAULT_VARS['SMB_EVE_ENABLED']),
True,
DEFAULT_VARS['SMB_PORTS'],
None,
),
'smtp': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['SMTP_ENABLED']),
val2bool(DEFAULT_VARS['SMTP_EVE_ENABLED']),
True,
None,
None,
),
'snmp': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['SNMP_ENABLED']),
val2bool(DEFAULT_VARS['SNMP_EVE_ENABLED']),
True,
None,
None,
),
'ssh': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['SSH_ENABLED']),
val2bool(DEFAULT_VARS['SSH_EVE_ENABLED']),
True,
None,
None,
),
'tftp': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['TFTP_ENABLED']),
val2bool(DEFAULT_VARS['TFTP_EVE_ENABLED']),
True,
None,
None,
),
'tls': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['TLS_ENABLED']),
val2bool(DEFAULT_VARS['TLS_EVE_ENABLED']),
True,
DEFAULT_VARS['TLS_PORTS'],
None,
),
}
)
DECODER_CONFIGS = defaultdict(lambda: ProtocolConfig([], True, False, False, None, None))
DECODER_CONFIGS.update(
{
'teredo': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['TEREDO_ENABLED']),
False,
False,
DEFAULT_VARS['TEREDO_PORTS'],
None,
),
'vxlan': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['VXLAN_ENABLED']),
False,
False,
DEFAULT_VARS['VXLAN_PORTS'],
None,
),
'geneve': ProtocolConfig(
[],
val2bool(DEFAULT_VARS['GENEVE_ENABLED']),
False,
False,
DEFAULT_VARS['GENEVE_PORTS'],
None,
),
}
)
###################################################################################################
def GetRuleSources(requireRulesExist=False):
global DEFAULT_VARS
ruleSources = []
if val2bool(DEFAULT_VARS['CUSTOM_RULES_ONLY']) == False:
ruleSources.append('suricata.rules')
customRuleFiles = (
fnmatch.filter(os.listdir(DEFAULT_VARS['CUSTOM_RULES_DIR']), '*.rules')
if DEFAULT_VARS['CUSTOM_RULES_DIR'] is not None
else []
)
if (DEFAULT_VARS['CUSTOM_RULES_DIR'] is not None) and ((requireRulesExist == False) or (len(customRuleFiles) > 0)):
ruleSources.append(os.path.join(DEFAULT_VARS['CUSTOM_RULES_DIR'], '*.rules'))
return ruleSources
###################################################################################################
def main():
global args
global DEFAULT_VARS
global PROTOCOL_CONFIGS
global DECODER_CONFIGS
parser = argparse.ArgumentParser(
description='\n'.join(
[
'modify suricata.yaml according to many environment variables',
]
),
formatter_class=argparse.RawTextHelpFormatter,
add_help=False,
usage='{} <arguments>'.format(script_name),
)
parser.add_argument(
'--verbose',
'-v',
action='count',
default=1,
help='Increase verbosity (e.g., -v, -vv, etc.)',
)
parser.add_argument(
'--inplace',
dest='inplace',
action='store_true',
help='Modify configuration file in-place',
)
parser.add_argument(
'--no-inplace',
dest='inplace',
action='store_false',
help='Do not modify configuration file in-place',
)
parser.set_defaults(inplace=True)
parser.add_argument(
'-i',
'--input',
dest='input',
type=str,
default=os.getenv(
'SURICATA_CONFIG_FILE',
os.path.join(os.path.join(os.getenv('SUPERVISOR_PATH', '/etc'), 'suricata'), 'suricata.yaml'),
),
required=False,
metavar='<string>',
help="Input YAML file",
)
parser.add_argument(
'-o',
'--output',
dest='output',
type=str,
default=None,
required=False,
metavar='<string>',
help="Output YAML file (take precedence over --inplace)",
)
try:
parser.error = parser.exit
args = parser.parse_args()
except SystemExit:
parser.print_help()
exit(2)
inFileParts = os.path.splitext(args.input)
args.output = (
args.output if args.output else args.input if args.inplace else inFileParts[0] + "_new" + inFileParts[1]
)
argsOrigVerbose = args.verbose
args.verbose = logging.CRITICAL - (10 * args.verbose) if args.verbose > 0 else 0
logging.basicConfig(
level=args.verbose, format='%(asctime)s %(levelname)s: %(message)s', datefmt='%Y-%m-%d %H:%M:%S'
)
logging.info(os.path.join(script_path, script_name))
logging.info("Arguments: {}".format(sys.argv[1:]))
logging.info("Arguments: {}".format(args))
if args.verbose > logging.DEBUG:
sys.tracebacklimit = 0
##################################################################################################
# back up the old YAML file if we need to first
if os.path.isfile(args.output) and os.path.samefile(args.input, args.output):
backupFile = inFileParts[0] + "_bak_" + str(int(round(time.time()))) + inFileParts[1]
CopyFile(args.input, backupFile)
backupFiles = sorted(fnmatch.filter(os.listdir(os.path.dirname(backupFile)), '*_bak_*'))
while len(backupFiles) > BACKUP_FILES_MAX:
toDeleteFileName = os.path.join(os.path.dirname(backupFile), backupFiles.pop(0))
logging.debug(f'Removing old backup file "{toDeleteFileName}"')
os.remove(toDeleteFileName)
##################################################################################################
# load input YAML
cfg = None
if args.input and os.path.isfile(args.input):
with open(args.input, 'r') as f:
inYaml = YAML(typ='rt')
inYaml.preserve_quotes = False
inYaml.emitter.alt_null = None
inYaml.representer.ignore_aliases = lambda x: True
inYaml.boolean_representation = ['no', 'yes']
cfg = inYaml.load(f)
# logging.debug(cfg)
# address and port groups
for addrKey in (
'HOME_NET',
'EXTERNAL_NET',
):
deep_set(cfg, ['vars', 'address-groups', addrKey], DEFAULT_VARS[addrKey])
# yer a wizard, 'arry
for portKey in (
'HTTP_PORTS',
'SHELLCODE_PORTS',
'ORACLE_PORTS',
'SSH_PORTS',
'DNP3_PORTS',
'MODBUS_PORTS',
'FILE_DATA_PORTS',
'FTP_PORTS',
'GENEVE_PORTS',
'VXLAN_PORTS',
'TEREDO_PORTS',
):
deep_set(cfg, ['vars', 'port-groups', portKey], DEFAULT_VARS[portKey])
# capture parameters
for cfgKey in (
['capture', 'disable-offloading', 'CAPTURE_DISABLE_OFFLOADING'],
['capture', 'checksum-validation', 'CAPTURE_CHECKSUM_VALIDATION'],
):
deep_set(
cfg,
cfgKey[:-1],
DEFAULT_VARS[cfgKey[-1]],
)
# af-packet interface definitions
captureIface = (
DEFAULT_VARS['CAPTURE_INTERFACE']
if DEFAULT_VARS['CAPTURE_INTERFACE'] is not None
else DEFAULT_VARS['PCAP_IFACE']
)
if captureIface is not None:
cfg.pop('af-packet', None)
cfg['af-packet'] = [{'interface': 'default'}]
clusterId = 99
for iface in captureIface.split(','):
cfg['af-packet'].insert(
0,
{
'interface': iface,
'cluster-id': clusterId,
'block-size': DEFAULT_VARS['AF_PACKET_BLOCK_SIZE'],
'block-timeout': DEFAULT_VARS['AF_PACKET_BLOCK_TIMEOUT'],
'bpf-filter': DEFAULT_VARS['CAPTURE_FILTER']
if DEFAULT_VARS['CAPTURE_FILTER'] is not None
else DEFAULT_VARS['PCAP_FILTER'],
'buffer-size': DEFAULT_VARS['AF_PACKET_BUFFER_SIZE'],
'checksum-checks': DEFAULT_VARS['AF_PACKET_CHECKSUM_CHECKS'],
'cluster-type': DEFAULT_VARS['AF_PACKET_CLUSTER_TYPE'],
'defrag': DEFAULT_VARS['AF_PACKET_DEFRAG'],
'mmap-locked': DEFAULT_VARS['AF_PACKET_MMAP_LOCKED'],
'ring-size': DEFAULT_VARS['AF_PACKET_RING_SIZE'],
'threads': DEFAULT_VARS['AF_PACKET_IFACE_THREADS'],
'tpacket-v3': DEFAULT_VARS['AF_PACKET_TPACKET_V3'],
'use-emergency-flush': DEFAULT_VARS['AF_PACKET_EMERGENCY_FLUSH'],
'use-mmap': DEFAULT_VARS['AF_PACKET_USE_MMAP'],
},
)
clusterId = clusterId - 1
# disable all outputs, then enable just the one we want (eve-log)
for outputIdx in range(len(cfg['outputs'])):
for name, config in cfg['outputs'][outputIdx].items():
cfg['outputs'][outputIdx][name]['enabled'] = name in ('eve-log')
# while we're here, configure the eve-log section of outputs
if name == 'eve-log':
# enable community-id for easier cross-referencing and pcap-file for
# tying back to the original PCAP filename
cfg['outputs'][outputIdx][name]['community-id'] = True
cfg['outputs'][outputIdx][name]['pcap-file'] = True
# configure the various different output types belonging to eve-log
if 'types' in cfg['outputs'][outputIdx][name]:
remainingTypes = set(list(PROTOCOL_CONFIGS.keys()))
for dumperIdx in reversed(range(len(cfg['outputs'][outputIdx][name]['types']))):
if isinstance(cfg['outputs'][outputIdx][name]['types'][dumperIdx], dict):
# eve.json alert type is map (has config)
for dumperName, dumperConfig in cfg['outputs'][outputIdx][name]['types'][dumperIdx].items():
remainingTypes.discard(dumperName)
# enable/disable this eve.json alert type (map config)
deep_set(
cfg['outputs'][outputIdx][name]['types'][dumperIdx],
[dumperName, 'enabled'],
(dumperName == 'alert')
or (
PROTOCOL_CONFIGS[dumperName].enabled
and PROTOCOL_CONFIGS[dumperName].eve_enabled
),
)
if dumperName == 'alert':
# don't dump payload, we can pivot to the payload with Arkime via community-id
for alertParam in (
'payload',
'payload-printable',
'packet',
'http-body',
'http-body-printable',
):
cfg['outputs'][outputIdx][name]['types'][dumperIdx][dumperName][
alertParam
] = False
elif dumperName == 'anomaly':
for cfgKey in (
[dumperName, 'types', 'decode', 'ANOMALY_DECODE'],
[dumperName, 'types', 'stream', 'ANOMALY_STREAM'],
[dumperName, 'types', 'applayer', 'ANOMALY_APPLAYER'],
[dumperName, 'types', 'packethdr', 'ANOMALY_PACKETHDR'],
):
deep_set(
cfg['outputs'][outputIdx][name]['types'][dumperIdx],
cfgKey[:-1],
DEFAULT_VARS[cfgKey[-1]],
deleteIfNone=True,
)
elif dumperName == 'dns':
for cfgKey in (
[dumperName, 'requests', 'DNS_REQUESTS'],
[dumperName, 'responses', 'DNS_RESPONSES'],
[dumperName, 'types', 'DNS_TYPES'],
[dumperName, 'formats', 'DNS_FORMATS'],
[dumperName, 'version', 'DNS_VERSION'],
):
deep_set(
cfg['outputs'][outputIdx][name]['types'][dumperIdx],
cfgKey[:-1],
DEFAULT_VARS[cfgKey[-1]],
deleteIfNone=True,
)
elif dumperName == 'dhcp':
for cfgKey in ([dumperName, 'extended', 'DHCP_EXTENDED'],):
deep_set(
cfg['outputs'][outputIdx][name]['types'][dumperIdx],
cfgKey[:-1],
DEFAULT_VARS[cfgKey[-1]],
deleteIfNone=True,
)
elif dumperName == 'http':
for cfgKey in (
[dumperName, 'extended', 'HTTP_EXTENDED'],
[dumperName, 'custom', 'HTTP_CUSTOM'],
[dumperName, 'dump-all-headers', 'HTTP_DUMP_ALL_HEADERS'],
):
deep_set(
cfg['outputs'][outputIdx][name]['types'][dumperIdx],
cfgKey[:-1],
DEFAULT_VARS[cfgKey[-1]],
deleteIfNone=True,
)
elif dumperName == 'files':
for cfgKey in (
[dumperName, 'force-magic', 'FILES_FORCE_MAGIC'],
[dumperName, 'force-hash', 'FILES_FORCE_HASH'],
):
deep_set(
cfg['outputs'][outputIdx][name]['types'][dumperIdx],
cfgKey[:-1],
DEFAULT_VARS[cfgKey[-1]],
deleteIfNone=True,
)
elif dumperName == 'mqtt':
for cfgKey in ([dumperName, 'passwords', 'MQTT_PASSWORDS'],):
deep_set(
cfg['outputs'][outputIdx][name]['types'][dumperIdx],
cfgKey[:-1],
DEFAULT_VARS[cfgKey[-1]],
deleteIfNone=True,
)
elif dumperName == 'smtp':
for cfgKey in (
[dumperName, 'extended', 'SMTP_EXTENDED'],
[dumperName, 'custom', 'SMTP_CUSTOM'],
[dumperName, 'md5', 'SMTP_MD5'],
):
deep_set(
cfg['outputs'][outputIdx][name]['types'][dumperIdx],
cfgKey[:-1],
DEFAULT_VARS[cfgKey[-1]],
deleteIfNone=True,
)
elif dumperName == 'tls':
for cfgKey in (
[dumperName, 'extended', 'TLS_EXTENDED'],
[dumperName, 'session-resumption', 'TLS_SESSION_RESUMPTION'],
[dumperName, 'custom', 'TLS_CUSTOM'],
):
deep_set(
cfg['outputs'][outputIdx][name]['types'][dumperIdx],
cfgKey[:-1],
DEFAULT_VARS[cfgKey[-1]],
deleteIfNone=True,
)
else:
# eve.json alert type is scalar
dumperName = cfg['outputs'][outputIdx][name]['types'][dumperIdx]
remainingTypes.discard(dumperName)
if (
(not PROTOCOL_CONFIGS[dumperName].enabled)
or (not PROTOCOL_CONFIGS[dumperName].eve_enabled)
or (not PROTOCOL_CONFIGS[dumperName].in_eve)
):
# we "disable" these types by removing them from the list
del cfg['outputs'][outputIdx][name]['types'][dumperIdx]
# handle the eve.json alert types that weren't handled above (were probably
# commented-out/missing and need to be added back in)
for dumperName in [