Updated DB_Helper by adding firebase methods.

venv/Lib/site-packages/jws/__init__.py

@@ -0,0 +1,56 @@
+from __future__ import absolute_import
+
+import json
+
+import jws.utils as utils
+
+# local
+import jws.algos as algos
+import jws.header as header
+from jws.exceptions import *
+
+##############
+# public api #
+##############
+def sign(head, payload, key=None, is_json=False):
+    data = {
+        'key': key,
+        'header': json.loads(head) if is_json else head,
+        'payload': json.loads(payload) if is_json else payload,
+        'signer': None
+    }
+    # TODO: re-evaluate whether to pass ``data`` by reference, or to copy and reassign
+    header.process(data, 'sign')
+    if not data['key']:
+        raise MissingKey("Key was not passed as a param and a key could not be found from the header")
+    if not data['signer']:
+        raise MissingSigner("Header was processed, but no algorithm was found to sign the message")
+    signer = data['signer']
+    signature = signer(_signing_input(head, payload, is_json), key)
+    return utils.to_base64(signature)
+
+
+def verify(head, payload, encoded_signature, key=None, is_json=False):
+    data = {
+        'key': key,
+        'header': json.loads(head) if is_json else head,
+        'payload': json.loads(payload) if is_json else payload,
+        'verifier': None
+    }
+    # TODO: re-evaluate whether to pass ``data`` by reference, or to copy and reassign
+    header.process(data, 'verify')
+    if not data['key']:
+        raise MissingKey("Key was not passed as a param and a key could not be found from the header")
+    if not data['verifier']:
+        raise MissingVerifier("Header was processed, but no algorithm was found to sign the message")
+    verifier = data['verifier']
+    signature = utils.from_base64(encoded_signature)
+    return verifier(_signing_input(head, payload, is_json), signature, key)
+
+####################
+# semi-private api #
+####################
+def _signing_input(head, payload, is_json=False):
+    enc = utils.to_base64 if is_json else utils.encode
+    head_input, payload_input = map(enc, [head, payload])
+    return "%s.%s" % (head_input, payload_input)