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#!/usr/bin/python
# This script gives client-side access to one Soledad user database.
import os
import argparse
import tempfile
import getpass
import requests
import srp._pysrp as srp
import binascii
import logging
from twisted.internet import reactor
from twisted.internet.defer import inlineCallbacks
from leap.soledad.client import Soledad
from leap.keymanager import KeyManager
from leap.keymanager.openpgp import OpenPGPKey
from util import ValidateUserHandle
# create a logger
logger = logging.getLogger(__name__)
LOG_FORMAT = '%(asctime)s %(message)s'
logging.basicConfig(format=LOG_FORMAT, level=logging.DEBUG)
safe_unhexlify = lambda x: binascii.unhexlify(x) if (
len(x) % 2 == 0) else binascii.unhexlify('0' + x)
def _fail(reason):
logger.error('Fail: ' + reason)
exit(2)
def _get_api_info(provider):
info = requests.get(
'https://'+provider+'/provider.json', verify=False).json()
return info['api_uri'], info['api_version']
def _login(username, passphrase, provider, api_uri, api_version):
usr = srp.User(username, passphrase, srp.SHA256, srp.NG_1024)
auth = None
try:
auth = _authenticate(api_uri, api_version, usr).json()
except requests.exceptions.ConnectionError:
_fail('Could not connect to server.')
if 'errors' in auth:
_fail(str(auth['errors']))
return api_uri, api_version, auth
def _authenticate(api_uri, api_version, usr):
api_url = "%s/%s" % (api_uri, api_version)
session = requests.session()
uname, A = usr.start_authentication()
params = {'login': uname, 'A': binascii.hexlify(A)}
init = session.post(
api_url + '/sessions', data=params, verify=False).json()
if 'errors' in init:
_fail('test user not found')
M = usr.process_challenge(
safe_unhexlify(init['salt']), safe_unhexlify(init['B']))
return session.put(api_url + '/sessions/' + uname, verify=False,
data={'client_auth': binascii.hexlify(M)})
def _get_soledad_info(username, provider, passphrase, basedir):
api_uri, api_version = _get_api_info(provider)
auth = _login(username, passphrase, provider, api_uri, api_version)
# get soledad server url
service_url = '%s/%s/config/soledad-service.json' % \
(api_uri, api_version)
soledad_hosts = requests.get(service_url, verify=False).json()['hosts']
hostnames = soledad_hosts.keys()
# allow for choosing the host
host = hostnames[0]
if len(hostnames) > 1:
i = 1
print "There are many available hosts:"
for h in hostnames:
print " (%d) %s.%s" % (i, h, provider)
i += 1
choice = raw_input("Choose a host to use (default: 1): ")
if choice != '':
host = hostnames[int(choice) - 1]
server_url = 'https://%s:%d/user-%s' % \
(soledad_hosts[host]['hostname'], soledad_hosts[host]['port'],
auth[2]['id'])
# get provider ca certificate
ca_cert = requests.get('https://%s/ca.crt' % provider, verify=False).text
cert_file = os.path.join(basedir, 'ca.crt')
with open(cert_file, 'w') as f:
f.write(ca_cert)
return auth[2]['id'], server_url, cert_file, auth[2]['token']
def _get_soledad_instance(uuid, passphrase, basedir, server_url, cert_file,
token):
# setup soledad info
logger.info('UUID is %s' % uuid)
logger.info('Server URL is %s' % server_url)
secrets_path = os.path.join(
basedir, '%s.secret' % uuid)
local_db_path = os.path.join(
basedir, '%s.db' % uuid)
# instantiate soledad
return Soledad(
uuid,
unicode(passphrase),
secrets_path=secrets_path,
local_db_path=local_db_path,
server_url=server_url,
cert_file=cert_file,
auth_token=token,
defer_encryption=False)
def _get_keymanager_instance(username, provider, soledad, token,
ca_cert_path=None, api_uri=None, api_version=None, uid=None,
gpgbinary=None):
return KeyManager(
"{username}@{provider}".format(username=username, provider=provider),
"http://uri",
soledad,
token=token,
ca_cert_path=ca_cert_path,
api_uri=api_uri,
api_version=api_version,
uid=uid,
gpgbinary=gpgbinary)
def _parse_args():
# parse command line
parser = argparse.ArgumentParser()
parser.add_argument(
'user@provider', action=ValidateUserHandle, help='the user handle')
parser.add_argument(
'--basedir', '-b', default=None,
help='soledad base directory')
parser.add_argument(
'--passphrase', '-p', default=None,
help='the user passphrase')
parser.add_argument(
'--sync', '-s', action='store_true',
help='synchronize with the server replica')
parser.add_argument(
'--export-public-key', help="export the public key to a file")
parser.add_argument(
'--export-private-key', help="export the private key to a file")
parser.add_argument(
'--export-incoming-messages',
help="export incoming messages to a directory")
return parser.parse_args()
def _get_passphrase(args):
passphrase = args.passphrase
if passphrase is None:
passphrase = getpass.getpass(
'Password for %s@%s: ' % (args.username, args.provider))
return passphrase
def _get_basedir(args):
basedir = args.basedir
if basedir is None:
basedir = tempfile.mkdtemp()
elif not os.path.isdir(basedir):
os.mkdir(basedir)
logger.info('Using %s as base directory.' % basedir)
return basedir
@inlineCallbacks
def _export_key(args, km, fname, private=False):
address = args.username + "@" + args.provider
pkey = yield km.get_key(address, OpenPGPKey, private=private, fetch_remote=False)
with open(args.export_private_key, "w") as f:
f.write(pkey.key_data)
@inlineCallbacks
def _export_incoming_messages(soledad, directory):
yield soledad.create_index("by-incoming", "bool(incoming)")
docs = yield soledad.get_from_index("by-incoming", '1')
i = 1
for doc in docs:
with open(os.path.join(directory, "message_%d.gpg" % i), "w") as f:
f.write(doc.content["_enc_json"])
i += 1
# main program
@inlineCallbacks
def _main(soledad, km, args):
if args.sync:
yield soledad.sync()
if args.export_private_key:
yield _export_key(args, km, args.export_private_key, private=True)
if args.export_public_key:
yield _export_key(args, km, args.expoert_public_key, private=False)
if args.export_incoming_messages:
yield _export_incoming_messages(soledad, args.export_incoming_messages)
reactor.stop()
if __name__ == '__main__':
args = _parse_args()
passphrase = _get_passphrase(args)
basedir = _get_basedir(args)
uuid, server_url, cert_file, token = \
_get_soledad_info(args.username, args.provider, passphrase, basedir)
soledad = _get_soledad_instance(
uuid, passphrase, basedir, server_url, cert_file, token)
km = _get_keymanager_instance(
args.username,
args.provider,
soledad,
token,
uid=uuid)
_main(soledad, km, args)
reactor.run()
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