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lemur/lemur/manage.py

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from __future__ import unicode_literals # at top of module
import os
import sys
import base64
import time
import arrow
import requests
import json
from gunicorn.config import make_settings
from cryptography.fernet import Fernet
from lockfile import LockFile, LockTimeout
from flask import current_app
from flask.ext.script import Manager, Command, Option, prompt_pass
from flask.ext.migrate import Migrate, MigrateCommand, stamp
from flask_script.commands import ShowUrls, Clean, Server
from lemur import database
from lemur.users import service as user_service
from lemur.roles import service as role_service
from lemur.certificates import service as cert_service
from lemur.sources import service as source_service
from lemur.notifications import service as notification_service
from lemur.certificates.service import get_name_from_arn
from lemur.certificates.verify import verify_string
from lemur.plugins.lemur_aws import elb
from lemur.sources.service import sync as source_sync
from lemur import create_app
# Needed to be imported so that SQLAlchemy create_all can find our models
from lemur.users.models import User # noqa
from lemur.roles.models import Role # noqa
from lemur.authorities.models import Authority # noqa
from lemur.certificates.models import Certificate # noqa
from lemur.destinations.models import Destination # noqa
from lemur.domains.models import Domain # noqa
from lemur.notifications.models import Notification # noqa
from lemur.sources.models import Source # noqa
manager = Manager(create_app)
manager.add_option('-c', '--config', dest='config')
migrate = Migrate(create_app)
KEY_LENGTH = 40
DEFAULT_CONFIG_PATH = '~/.lemur/lemur.conf.py'
DEFAULT_SETTINGS = 'lemur.conf.server'
SETTINGS_ENVVAR = 'LEMUR_CONF'
CONFIG_TEMPLATE = """
# This is just Python which means you can inherit and tweak settings
import os
_basedir = os.path.abspath(os.path.dirname(__file__))
ADMINS = frozenset([''])
THREADS_PER_PAGE = 8
# General
# These will need to be set to `True` if you are developing locally
CORS = False
debug = False
# this is the secret key used by flask session management
SECRET_KEY = '{flask_secret_key}'
# You should consider storing these separately from your config
LEMUR_TOKEN_SECRET = '{secret_token}'
LEMUR_ENCRYPTION_KEYS = '{encryption_key}'
# this is a list of domains as regexes that only admins can issue
LEMUR_RESTRICTED_DOMAINS = []
# Mail Server
LEMUR_EMAIL = ''
LEMUR_SECURITY_TEAM_EMAIL = []
# Certificate Defaults
LEMUR_DEFAULT_COUNTRY = ''
LEMUR_DEFAULT_STATE = ''
LEMUR_DEFAULT_LOCATION = ''
LEMUR_DEFAULT_ORGANIZATION = ''
LEMUR_DEFAULT_ORGANIZATIONAL_UNIT = ''
# Authentication Providers
ACTIVE_PROVIDERS = []
# Logging
LOG_LEVEL = "DEBUG"
LOG_FILE = "lemur.log"
# Database
# modify this if you are not using a local database
SQLALCHEMY_DATABASE_URI = 'postgresql://lemur:lemur@localhost:5432/lemur'
# AWS
#LEMUR_INSTANCE_PROFILE = 'Lemur'
# Issuers
# These will be dependent on which 3rd party that Lemur is
# configured to use.
# VERISIGN_URL = ''
# VERISIGN_PEM_PATH = ''
# VERISIGN_FIRST_NAME = ''
# VERISIGN_LAST_NAME = ''
# VERSIGN_EMAIL = ''
"""
@MigrateCommand.command
def create():
database.db.create_all()
stamp(revision='head')
@MigrateCommand.command
def drop_all():
database.db.drop_all()
@manager.command
def check_revoked():
"""
Function attempts to update Lemur's internal cache with revoked
certificates. This is called periodically by Lemur. It checks both
CRLs and OCSP to see if a certificate is revoked. If Lemur is unable
encounters an issue with verification it marks the certificate status
as `unknown`.
"""
for cert in cert_service.get_all_certs():
try:
if cert.chain:
status = verify_string(cert.body, cert.chain)
else:
status = verify_string(cert.body, "")
cert.status = 'valid' if status else 'invalid'
except Exception as e:
cert.status = 'unknown'
database.update(cert)
@manager.shell
def make_shell_context():
"""
Creates a python REPL with several default imports
in the context of the current_app
:return:
"""
return dict(current_app=current_app)
def generate_settings():
"""
This command is run when ``default_path`` doesn't exist, or ``init`` is
run and returns a string representing the default data to put into their
settings file.
"""
output = CONFIG_TEMPLATE.format(
# we use Fernet.generate_key to make sure that the key length is
# compatible with Fernet
encryption_key=Fernet.generate_key(),
secret_token=base64.b64encode(os.urandom(KEY_LENGTH)),
flask_secret_key=base64.b64encode(os.urandom(KEY_LENGTH)),
)
return output
@manager.option('-s', '--sources', dest='labels')
def sync(labels):
"""
Attempts to run several methods Certificate discovery. This is
run on a periodic basis and updates the Lemur datastore with the
information it discovers.
"""
if not labels:
sys.stdout.write("Active\tLabel\tDescription\n")
for source in source_service.get_all():
sys.stdout.write(
"{active}\t{label}\t{description}!\n".format(
label=source.label,
description=source.description,
active=source.active
)
)
else:
start_time = time.time()
lock_file = "/tmp/.lemur_lock"
sync_lock = LockFile(lock_file)
while not sync_lock.i_am_locking():
try:
sync_lock.acquire(timeout=10) # wait up to 10 seconds
sys.stdout.write("[+] Staring to sync sources: {labels}!\n".format(labels=labels))
labels = labels.split(",")
if labels[0] == 'all':
source_sync()
else:
source_sync(labels=labels)
sys.stdout.write(
"[+] Finished syncing sources. Run Time: {time}\n".format(
time=(time.time() - start_time)
)
)
except LockTimeout:
sys.stderr.write(
"[!] Unable to acquire file lock on {file}, is there another sync running?\n".format(
file=lock_file
)
)
sync_lock.break_lock()
sync_lock.acquire()
sync_lock.release()
sync_lock.release()
@manager.command
def notify():
"""
Runs Lemur's notification engine, that looks for expired certificates and sends
notifications out to those that bave subscribed to them.
:return:
"""
sys.stdout.write("Starting to notify subscribers about expiring certificates!\n")
count = notification_service.send_expiration_notifications()
sys.stdout.write(
"Finished notifying subscribers about expiring certificates! Sent {count} notifications!\n".format(
count=count
)
)
class InitializeApp(Command):
"""
This command will bootstrap our database with any destinations as
specified by our config.
Additionally a Lemur user will be created as a default user
and be used when certificates are discovered by Lemur.
"""
option_list = (
Option('-p', '--password', dest='password'),
)
def run(self, password):
create()
user = user_service.get_by_username("lemur")
if not user:
if not password:
sys.stdout.write("We need to set Lemur's password to continue!\n")
password = prompt_pass("Password")
password1 = prompt_pass("Confirm Password")
if password != password1:
sys.stderr.write("[!] Passwords do not match!\n")
sys.exit(1)
role = role_service.get_by_name('admin')
if role:
sys.stdout.write("[-] Admin role already created, skipping...!\n")
else:
# we create an admin role
role = role_service.create('admin', description='this is the lemur administrator role')
sys.stdout.write("[+] Created 'admin' role\n")
user_service.create("lemur", password, 'lemur@nobody', True, None, [role])
sys.stdout.write("[+] Added a 'lemur' user and added it to the 'admin' role!\n")
else:
sys.stdout.write("[-] Default user has already been created, skipping...!\n")
sys.stdout.write("[+] Creating expiration email notifications!\n")
sys.stdout.write("[!] Using {0} as specified by LEMUR_SECURITY_TEAM_EMAIL for notifications\n".format("LEMUR_SECURITY_TEAM_EMAIL"))
intervals = current_app.config.get("LEMUR_DEFAULT_EXPIRATION_NOTIFICATION_INTERVALS", [])
sys.stdout.write(
"[!] Creating {num} notifications for {intervals} days as specified by LEMUR_DEFAULT_EXPIRATION_NOTIFICATION_INTERVALS\n".format(
num=len(intervals),
intervals=",".join([str(x) for x in intervals])
)
)
recipients = current_app.config.get('LEMUR_SECURITY_TEAM_EMAIL')
notification_service.create_default_expiration_notifications("DEFAULT_SECURITY", recipients=recipients)
sys.stdout.write("[/] Done!\n")
class CreateUser(Command):
"""
This command allows for the creation of a new user within Lemur.
"""
option_list = (
Option('-u', '--username', dest='username', required=True),
Option('-e', '--email', dest='email', required=True),
Option('-a', '--active', dest='active', default=True),
Option('-r', '--roles', dest='roles', action='append', default=[])
)
def run(self, username, email, active, roles):
role_objs = []
for r in roles:
role_obj = role_service.get_by_name(r)
if role_obj:
role_objs.append(role_obj)
else:
sys.stderr.write("[!] Cannot find role {0}\n".format(r))
sys.exit(1)
password1 = prompt_pass("Password")
password2 = prompt_pass("Confirm Password")
if password1 != password2:
sys.stderr.write("[!] Passwords do not match!\n")
sys.exit(1)
user_service.create(username, password1, email, active, None, role_objs)
sys.stdout.write("[+] Created new user: {0}\n".format(username))
class ResetPassword(Command):
"""
This command allows you to reset a user's password.
"""
option_list = (
Option('-u', '--username', dest='username', required=True),
)
def run(self, username):
user = user_service.get_by_username(username)
if not user:
sys.stderr.write("[!] No user found for username: {0}\n".format(username))
sys.exit(1)
sys.stderr.write("[+] Resetting password for {0}\n".format(username))
password1 = prompt_pass("Password")
password2 = prompt_pass("Confirm Password")
if password1 != password2:
sys.stderr.write("[!] Passwords do not match\n")
sys.exit(1)
user.password = password1
user.hash_password()
database.commit()
class CreateRole(Command):
"""
This command allows for the creation of a new role within Lemur
"""
option_list = (
Option('-n', '--name', dest='name', required=True),
Option('-u', '--users', dest='users', default=[]),
Option('-d', '--description', dest='description', required=True)
)
def run(self, name, users, description):
user_objs = []
for u in users:
user_obj = user_service.get_by_username(u)
if user_obj:
user_objs.append(user_obj)
else:
sys.stderr.write("[!] Cannot find user {0}".format(u))
sys.exit(1)
role_service.create(name, description=description, users=users)
sys.stdout.write("[+] Created new role: {0}".format(name))
class LemurServer(Command):
"""
This is the main Lemur server, it runs the flask app with gunicorn and
uses any configuration options passed to it.
You can pass all standard gunicorn flags to this command as if you were
running gunicorn itself.
For example:
lemur start -w 4 -b 127.0.0.0:8002
Will start gunicorn with 4 workers bound to 127.0.0.0:8002
"""
description = 'Run the app within Gunicorn'
def get_options(self):
settings = make_settings()
options = (
Option(*klass.cli, action=klass.action)
for setting, klass in settings.items() if klass.cli
)
return options
def run(self, *args, **kwargs):
from gunicorn.app.wsgiapp import WSGIApplication
app = WSGIApplication()
app.app_uri = 'lemur:create_app(config="{0}")'.format(kwargs.get('config'))
return app.run()
@manager.command
def create_config(config_path=None):
"""
Creates a new configuration file if one does not already exist
"""
if not config_path:
config_path = DEFAULT_CONFIG_PATH
config_path = os.path.expanduser(config_path)
dir = os.path.dirname(config_path)
if not os.path.exists(dir):
os.makedirs(dir)
config = generate_settings()
with open(config_path, 'w') as f:
f.write(config)
sys.stdout.write("[+] Created a new configuration file {0}\n".format(config_path))
@manager.command
def lock(path=None):
"""
Encrypts a given path. This directory can be used to store secrets needed for normal
Lemur operation. This is especially useful for storing secrets needed for communication
with third parties (e.g. external certificate authorities).
Lemur does not assume anything about the contents of the directory and will attempt to
encrypt all files contained within. Currently this has only been tested against plain
text files.
Path defaults ~/.lemur/keys
:param: path
"""
if not path:
path = os.path.expanduser('~/.lemur/keys')
dest_dir = os.path.join(path, "encrypted")
sys.stdout.write("[!] Generating a new key...\n")
key = Fernet.generate_key()
if not os.path.exists(dest_dir):
sys.stdout.write("[+] Creating encryption directory: {0}\n".format(dest_dir))
os.makedirs(dest_dir)
for root, dirs, files in os.walk(os.path.join(path, 'decrypted')):
for f in files:
source = os.path.join(root, f)
dest = os.path.join(dest_dir, f + ".enc")
with open(source, 'rb') as in_file, open(dest, 'wb') as out_file:
f = Fernet(key)
data = f.encrypt(in_file.read())
out_file.write(data)
sys.stdout.write("[+] Writing file: {0} Source: {1}\n".format(dest, source))
sys.stdout.write("[+] Keys have been encrypted with key {0}\n".format(key))
@manager.command
def unlock(path=None):
"""
Decrypts all of the files in a given directory with provided password.
This is most commonly used during the startup sequence of Lemur
allowing it to go from source code to something that can communicate
with external services.
Path defaults ~/.lemur/keys
:param: path
"""
key = prompt_pass("[!] Please enter the encryption password")
if not path:
path = os.path.expanduser('~/.lemur/keys')
dest_dir = os.path.join(path, "decrypted")
source_dir = os.path.join(path, "encrypted")
if not os.path.exists(dest_dir):
sys.stdout.write("[+] Creating decryption directory: {0}\n".format(dest_dir))
os.makedirs(dest_dir)
for root, dirs, files in os.walk(source_dir):
for f in files:
source = os.path.join(source_dir, f)
dest = os.path.join(dest_dir, ".".join(f.split(".")[:-1]))
with open(source, 'rb') as in_file, open(dest, 'wb') as out_file:
f = Fernet(key)
data = f.decrypt(in_file.read())
out_file.write(data)
sys.stdout.write("[+] Writing file: {0} Source: {1}\n".format(dest, source))
sys.stdout.write("[+] Keys have been unencrypted!\n")
def unicode_(data):
import sys
if sys.version_info.major < 3:
return data.decode('UTF-8')
return data
class RotateELBs(Command):
"""
Rotates existing certificates to a new one on an ELB
"""
option_list = (
Option('-e', '--elb-list', dest='elb_list', required=True),
Option('-p', '--chain-path', dest='chain_path'),
Option('-c', '--cert-name', dest='cert_name'),
Option('-a', '--cert-prefix', dest='cert_prefix'),
Option('-d', '--description', dest='description')
)
def run(self, elb_list, chain_path, cert_name, cert_prefix, description):
for e in open(elb_list, 'r').readlines():
elb_name, account_id, region, from_port, to_port, protocol = e.strip().split(',')
if cert_name:
arn = "arn:aws:iam::{0}:server-certificate/{1}".format(account_id, cert_name)
else:
# if no cert name is provided we need to discover it
listeners = elb.get_listeners(account_id, region, elb_name)
# get the listener we care about
for listener in listeners:
if listener[0] == int(from_port) and listener[1] == int(to_port):
arn = listener[4]
name = get_name_from_arn(arn)
certificate = cert_service.get_by_name(name)
break
else:
sys.stdout.write("[-] Could not find ELB {0}".format(elb_name))
continue
if not certificate:
sys.stdout.write("[-] Could not find certificate {0} in Lemur".format(name))
continue
dests = []
for d in certificate.destinations:
dests.append({'id': d.id})
nots = []
for n in certificate.notifications:
nots.append({'id': n.id})
new_certificate = database.clone(certificate)
if cert_prefix:
new_certificate.name = "{0}-{1}".format(cert_prefix, new_certificate.name)
new_certificate.chain = open(chain_path, 'r').read()
new_certificate.description = "{0} - {1}".format(new_certificate.description, description)
new_certificate = database.create(new_certificate)
database.update_list(new_certificate, 'destinations', Destination, dests)
database.update_list(new_certificate, 'notifications', Notification, nots)
database.update(new_certificate)
arn = new_certificate.get_arn(account_id)
elb.update_listeners(account_id, region, elb_name, [(from_port, to_port, protocol, arn)], [from_port])
sys.stdout.write("[+] Updated {0} to use {1}\n".format(elb_name, new_certificate.name))
class ProvisionELB(Command):
"""
Creates and provisions a certificate on an ELB based on command line arguments
"""
option_list = (
Option('-d', '--dns', dest='dns', action='append', required=True, type=unicode_),
Option('-e', '--elb', dest='elb_name', required=True, type=unicode_),
Option('-o', '--owner', dest='owner', type=unicode_),
Option('-a', '--authority', dest='authority', required=True, type=unicode_),
Option('-s', '--description', dest='description', default=u'Command line provisioned keypair', type=unicode_),
Option('-t', '--destination', dest='destinations', action='append', type=unicode_, required=True),
Option('-n', '--notification', dest='notifications', action='append', type=unicode_, default=[]),
Option('-r', '--region', dest='region', default=u'us-east-1', type=unicode_),
Option('-p', '--dport', '--port', dest='dport', default=7002),
Option('--src-port', '--source-port', '--sport', dest='sport', default=443),
Option('--dry-run', dest='dryrun', action='store_true')
)
def configure_user(self, owner):
from flask import g
import lemur.users.service
# grab the user
g.user = lemur.users.service.get_by_username(owner)
# get the first user by default
if not g.user:
g.user = lemur.users.service.get_all()[0]
return g.user.username
def build_cert_options(self, destinations, notifications, description, owner, dns, authority):
from sqlalchemy.orm.exc import NoResultFound
from lemur.certificates.views import valid_authority
import sys
# convert argument lists to arrays, or empty sets
destinations = self.get_destinations(destinations)
if not destinations:
sys.stderr.write("Valid destinations provided\n")
sys.exit(1)
# get the primary CN
common_name = dns[0]
# If there are more than one fqdn, add them as alternate names
extensions = {}
if len(dns) > 1:
extensions['subAltNames'] = {'names': map(lambda x: {'nameType': 'DNSName', 'value': x}, dns)}
try:
authority = valid_authority({"name": authority})
except NoResultFound:
sys.stderr.write("Invalid authority specified: '{}'\naborting\n".format(authority))
sys.exit(1)
options = {
# Convert from the Destination model to the JSON input expected further in the code
'destinations': map(lambda x: {'id': x.id, 'label': x.label}, destinations),
'description': description,
'notifications': notifications,
'commonName': common_name,
'extensions': extensions,
'authority': authority,
'owner': owner,
# defaults:
'organization': current_app.config.get('LEMUR_DEFAULT_ORGANIZATION'),
'organizationalUnit': current_app.config.get('LEMUR_DEFAULT_ORGANIZATIONAL_UNIT'),
'country': current_app.config.get('LEMUR_DEFAULT_COUNTRY'),
'state': current_app.config.get('LEMUR_DEFAULT_STATE'),
'location': current_app.config.get('LEMUR_DEFAULT_LOCATION')
}
return options
def get_destinations(self, destination_names):
from lemur.destinations import service
destinations = []
for destination_name in destination_names:
destination = service.get_by_label(destination_name)
if not destination:
sys.stderr.write("Invalid destination specified: '{}'\nAborting...\n".format(destination_name))
sys.exit(1)
destinations.append(service.get_by_label(destination_name))
return destinations
def check_duplicate_listener(self, elb_name, region, account, sport, dport):
from lemur.plugins.lemur_aws import elb
listeners = elb.get_listeners(account, region, elb_name)
for listener in listeners:
if listener[0] == sport and listener[1] == dport:
return True
return False
def get_destination_account(self, destinations):
for destination in self.get_destinations(destinations):
if destination.plugin_name == 'aws-destination':
account_number = destination.plugin.get_option('accountNumber', destination.options)
return account_number
sys.stderr.write("No destination AWS account provided, failing\n")
sys.exit(1)
def run(self, dns, elb_name, owner, authority, description, notifications, destinations, region, dport, sport,
dryrun):
from lemur.certificates import service
from lemur.plugins.lemur_aws import elb
from boto.exception import BotoServerError
# configure the owner if we can find it, or go for default, and put it in the global
owner = self.configure_user(owner)
# make a config blob from the command line arguments
cert_options = self.build_cert_options(
destinations=destinations,
notifications=notifications,
description=description,
owner=owner,
dns=dns,
authority=authority)
aws_account = self.get_destination_account(destinations)
if dryrun:
import json
cert_options['authority'] = cert_options['authority'].name
sys.stdout.write('Will create certificate using options: {}\n'
.format(json.dumps(cert_options, sort_keys=True, indent=2)))
sys.stdout.write('Will create listener {}->{} HTTPS using the new certificate to elb {}\n'
.format(sport, dport, elb_name))
sys.exit(0)
if self.check_duplicate_listener(elb_name, region, aws_account, sport, dport):
sys.stderr.write("ELB {} already has a listener {}->{}\nAborting...\n".format(elb_name, sport, dport))
sys.exit(1)
# create the certificate
try:
sys.stdout.write('Creating certificate for {}\n'.format(cert_options['commonName']))
cert = service.create(**cert_options)
except Exception as e:
if e.message == 'Duplicate certificate: a certificate with the same common name exists already':
sys.stderr.write("Certificate already exists named: {}\n".format(dns[0]))
sys.exit(1)
raise e
cert_arn = cert.get_arn(aws_account)
sys.stderr.write('cert arn: {}\n'.format(cert_arn))
sys.stderr.write('Configuring elb {} from port {} to port {} in region {} with cert {}\n'
.format(elb_name, sport, dport, region, cert_arn))
delay = 1
done = False
retries = 5
while not done and retries > 0:
try:
elb.create_new_listeners(aws_account, region, elb_name, [(sport, dport, 'HTTPS', cert_arn)])
except BotoServerError as bse:
# if the server returns ad error, the certificate
if bse.error_code == 'CertificateNotFound':
sys.stderr.write('Certificate not available yet in the AWS account, waiting {}, {} retries left\n'
.format(delay, retries))
time.sleep(delay)
delay *= 2
retries -= 1
elif bse.error_code == 'DuplicateListener':
sys.stderr.write('ELB {} already has a listener {}->{}'.format(elb_name, sport, dport))
sys.exit(1)
else:
raise bse
else:
done = True
@manager.command
def publish_verisign_units():
"""
Simple function that queries verisign for API units and posts the mertics to
Atlas API for other teams to consume.
:return:
"""
from lemur.plugins import plugins
v = plugins.get('verisign-issuer')
units = v.get_available_units()
metrics = {}
for item in units:
if item['@type'] in metrics.keys():
metrics[item['@type']] += int(item['@remaining'])
else:
metrics.update({item['@type']: int(item['@remaining'])})
for name, value in metrics.items():
metric = [
{
"timestamp": 1321351651,
"type": "GAUGE",
"name": "Symantec {0} Unit Count".format(name),
"tags": {},
"value": value
}
]
requests.post('http://localhost:8078/metrics', data=json.dumps(metric))
class Rolling(Command):
"""
Rotates existing certificates to a new one on an ELB
"""
option_list = (
Option('-w', '--window', dest='window', default=24),
)
def run(self, window):
"""
Simple function that queries verisign for API units and posts the mertics to
Atlas API for other teams to consume.
:return:
"""
end = arrow.utcnow()
start = end.replace(hours=-window)
items = Certificate.query.filter(Certificate.not_before <= end.format('YYYY-MM-DD')) \
.filter(Certificate.not_before >= start.format('YYYY-MM-DD')).all()
metrics = {}
for i in items:
name = "{0},{1}".format(i.owner, i.issuer)
if metrics.get(name):
metrics[name] += 1
else:
metrics[name] = 1
for name, value in metrics.iteritems():
owner, issuer = name.split(",")
metric = [
{
"timestamp": 1321351651,
"type": "GAUGE",
"name": "Issued Certificates",
"tags": {"owner": owner, "issuer": issuer, "window": window},
"value": value
}
]
requests.post('http://localhost:8078/metrics', data=json.dumps(metric))
def main():
manager.add_command("start", LemurServer())
manager.add_command("runserver", Server(host='127.0.0.1'))
manager.add_command("clean", Clean())
manager.add_command("show_urls", ShowUrls())
manager.add_command("db", MigrateCommand)
manager.add_command("init", InitializeApp())
manager.add_command("create_user", CreateUser())
manager.add_command("reset_password", ResetPassword())
manager.add_command("create_role", CreateRole())
manager.add_command("provision_elb", ProvisionELB())
manager.add_command("rotate_elbs", RotateELBs())
manager.add_command("rolling", Rolling())
manager.run()
if __name__ == "__main__":
main()
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