1 files changed, 219 insertions, 0 deletions
diff --git a/bonafide/src/leap/bonafide/session.py b/bonafide/src/leap/bonafide/session.py
new file mode 100644
index 0000000..4180041
--- /dev/null
+++ b/bonafide/src/leap/bonafide/session.py
@@ -0,0 +1,219 @@
+# -*- coding: utf-8 -*-
+# session.py
+# Copyright (C) 2015 LEAP
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+"""
+LEAP Session management.
+"""
+from twisted.internet import defer, reactor
+from twisted.python import log
+
+from leap.bonafide import _srp
+from leap.bonafide import provider
+from leap.bonafide._http import httpRequest, cookieAgentFactory
+
+OK = 'ok'
+
+
+def _auth_required(func):
+    """
+    Decorate a method so that it will not be called if the instance
+    attribute `is_authenticated` does not evaluate to True.
+    """
+    def decorated(*args, **kwargs):
+        instance = args[0]
+        allowed = getattr(instance, 'is_authenticated')
+        if not allowed:
+            raise RuntimeError('This method requires authentication')
+        return func(*args, **kwargs)
+    return decorated
+
+
+class Session(object):
+
+    def __init__(self, credentials, api, provider_cert):
+        # TODO check if an anonymous credentials is passed.
+        # TODO move provider_cert to api object.
+        # On creation, it should be able to retrieve all the info it needs
+        # (calling bootstrap).
+        # TODO could get a "provider" object instead.
+        # this provider can have an api attribute,
+        # and a "autoconfig" attribute passed on initialization.
+        # TODO get a file-descriptor for password if not in credentials
+        # TODO merge self._request with config.Provider._http_request ?
+
+        self.username = credentials.username
+        self.password = credentials.password
+        self._provider_cert = provider_cert
+        self._api = api
+        self._initialize_session()
+
+    def _initialize_session(self):
+        self._agent = cookieAgentFactory(self._provider_cert)
+        username = self.username or ''
+        password = self.password or ''
+        self._srp_auth = _srp.SRPAuthMechanism(username, password)
+        self._srp_signup = _srp.SRPSignupMechanism()
+        self._token = None
+        self._uuid = None
+
+    # Session
+
+    @property
+    def token(self):
+        return self._token
+
+    @property
+    def uuid(self):
+        return self._uuid
+
+    @property
+    def is_authenticated(self):
+        return self._srp_auth.srp_user.authenticated()
+
+    @defer.inlineCallbacks
+    def authenticate(self):
+        uri = self._api.get_handshake_uri()
+        met = self._api.get_handshake_method()
+        log.msg("%s to %s" % (met, uri))
+        params = self._srp_auth.get_handshake_params()
+
+        handshake = yield self._request(self._agent, uri, values=params,
+                                        method=met)
+
+        self._srp_auth.process_handshake(handshake)
+        uri = self._api.get_authenticate_uri(login=self.username)
+        met = self._api.get_authenticate_method()
+
+        log.msg("%s to %s" % (met, uri))
+        params = self._srp_auth.get_authentication_params()
+
+        auth = yield self._request(self._agent, uri, values=params,
+                                   method=met)
+
+        uuid, token = self._srp_auth.process_authentication(auth)
+        self._srp_auth.verify_authentication()
+
+        self._uuid = uuid
+        self._token = token
+        defer.returnValue(OK)
+
+    @_auth_required
+    @defer.inlineCallbacks
+    def logout(self):
+        uri = self._api.get_logout_uri()
+        met = self._api.get_logout_method()
+        auth = yield self._request(self._agent, uri, method=met)
+        print 'AUTH', auth
+        print 'resetting user/pass'
+        self.username = None
+        self.password = None
+        self._initialize_session()
+        defer.returnValue(OK)
+
+    # User certificates
+
+    def get_vpn_cert(self):
+        # TODO pass it to the provider object so that it can save it in the
+        # right path.
+        uri = self._api.get_vpn_cert_uri()
+        met = self._api.get_vpn_cert_method()
+        return self._request(self._agent, uri, method=met)
+
+    @_auth_required
+    def get_smtp_cert(self):
+        # TODO pass it to the provider object so that it can save it in the
+        # right path.
+        uri = self._api.get_smtp_cert_uri()
+        met = self._api.get_smtp_cert_method()
+        print met, "to", uri
+        return self._request(self._agent, uri, method=met)
+
+    def _request(self, *args, **kw):
+        kw['token'] = self._token
+        return httpRequest(*args, **kw)
+
+    # User management
+
+    @defer.inlineCallbacks
+    def signup(self, username, password):
+        # XXX should check that it_IS_NOT_authenticated
+        provider.validate_username(username)
+        uri = self._api.get_signup_uri()
+        met = self._api.get_signup_method()
+        params = self._srp_signup.get_signup_params(
+            username, password)
+
+        signup = yield self._request(self._agent, uri, values=params,
+                                     method=met)
+        registered_user = self._srp_signup.process_signup(signup)
+        self.username = username
+        self.password = password
+        defer.returnValue((OK, registered_user))
+
+    @_auth_required
+    def update_user_record(self):
+        # FIXME to be implemented
+        pass
+
+    # Authentication-protected configuration
+
+    @defer.inlineCallbacks
+    def fetch_provider_configs(self, uri, path):
+        config = yield self._request(self._agent, uri)
+        with open(path, 'w') as cf:
+            cf.write(config)
+        defer.returnValue('ok')
+
+
+if __name__ == "__main__":
+    import os
+    import sys
+    from twisted.cred.credentials import UsernamePassword
+
+    if len(sys.argv) != 4:
+        print "Usage:", sys.argv[0], "provider", "username", "password"
+        sys.exit()
+    _provider, username, password = sys.argv[1], sys.argv[2], sys.argv[3]
+    api = provider.Api('https://api.%s:4430' % _provider)
+    credentials = UsernamePassword(username, password)
+    cdev_pem = os.path.expanduser(
+        '~/.config/leap/providers/%s/keys/ca/cacert.pem' % _provider)
+    session = Session(credentials, api, cdev_pem)
+
+    def print_result(result):
+        print result
+        return result
+
+    def cbShutDown(ignored):
+        reactor.stop()
+
+    def auth_eb(failure):
+        print "[ERROR!]", failure.getErrorMessage()
+        log.err(failure)
+
+    d = session.authenticate()
+    d.addCallback(print_result)
+    d.addErrback(auth_eb)
+
+    d.addCallback(lambda _: session.get_smtp_cert())
+    #d.addCallback(lambda _: session.get_vpn_cert())
+    d.addCallback(print_result)
+    d.addErrback(auth_eb)
+
+    d.addCallback(lambda _: session.logout())
+    d.addErrback(auth_eb)
+    d.addBoth(cbShutDown)
+    reactor.run()