1 files changed, 69 insertions, 0 deletions
diff --git a/src/leap/soledad/client/auth.py b/src/leap/soledad/client/auth.py
new file mode 100644
index 00000000..78e9bf1b
--- /dev/null
+++ b/src/leap/soledad/client/auth.py
@@ -0,0 +1,69 @@
+# -*- coding: utf-8 -*-
+# auth.py
+# Copyright (C) 2013 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/>.
+"""
+Methods for token-based authentication.
+
+These methods have to be included in all classes that extend HTTPClient so
+they can do token-based auth requests to the Soledad server.
+"""
+import base64
+
+from leap.soledad.common.l2db import errors
+
+
+class TokenBasedAuth(object):
+    """
+    Encapsulate token-auth methods for classes that inherit from
+    u1db.remote.http_client.HTTPClient.
+    """
+
+    def set_token_credentials(self, uuid, token):
+        """
+        Store given credentials so we can sign the request later.
+
+        :param uuid: The user's uuid.
+        :type uuid: str
+        :param token: The authentication token.
+        :type token: str
+        """
+        self._creds = {'token': (uuid, token)}
+
+    def _sign_request(self, method, url_query, params):
+        """
+        Return an authorization header to be included in the HTTP request, in
+        the form:
+
+            [('Authorization', 'Token <(base64 encoded) uuid:token>')]
+
+        :param method: The HTTP method.
+        :type method: str
+        :param url_query: The URL query string.
+        :type url_query: str
+        :param params: A list with encoded query parameters.
+        :type param: list
+
+        :return: The Authorization header.
+        :rtype: list of tuple
+        """
+        if 'token' in self._creds:
+            uuid, token = self._creds['token']
+            auth = '%s:%s' % (uuid, token)
+            b64_token = base64.b64encode(auth)
+            return [('Authorization', 'Token %s' % b64_token)]
+        else:
+            raise errors.UnknownAuthMethod(
+                'Wrong credentials: %s' % self._creds)