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import logging
import os
import tempfile
import getpass
import requests
import srp._pysrp as srp
import binascii
import json
from twisted.internet.defer import inlineCallbacks
from leap.soledad.client import Soledad
"""
Helper functions to give access to client-side Soledad database.
"""
# create a logger
logger = logging.getLogger(__name__)
# DEBUG: enable debug logs
# 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=True)
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
@inlineCallbacks
def _get_all_docs(soledad):
_, docs = yield soledad.get_all_docs()
for doc in docs:
print json.dumps(doc.content, indent=4)
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