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import srp._pysrp as srp
import binascii
safe_unhexlify = lambda x: binascii.unhexlify(x) if (
len(x) % 2 == 0) else binascii.unhexlify('0' + x)
class User():
def __init__(self, config):
self.config = config.user
self.srp_user = srp.User(self.config['username'], self.config['password'], srp.SHA256, srp.NG_1024)
def login(self, api):
init=self.init_authentication(api)
if ('errors' in init):
raise Exception('test user not found')
auth=self.authenticate(api, init)
if ('errors' in auth):
raise Exception('srp password auth failed')
self.verify_server(auth)
if not self.is_authenticated():
raise Exception('user is not authenticated')
return auth
def init_authentication(self, api):
uname, A = self.srp_user.start_authentication()
params = {
'login': uname,
'A': binascii.hexlify(A)
}
return api.post('sessions', data=params)
def authenticate(self, api, init):
M = self.srp_user.process_challenge(
safe_unhexlify(init['salt']), safe_unhexlify(init['B']))
auth = api.put('sessions/' + self.config["username"],
data={'client_auth': binascii.hexlify(M)})
return auth
def verify_server(self, auth):
self.srp_user.verify_session(safe_unhexlify(auth["M2"]))
def is_authenticated(self):
return self.srp_user.authenticated()
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