Updated DB_Helper by adding firebase methods.

venv/Lib/site-packages/rsa/asn1.py

@@ -0,0 +1,51 @@
+#  Copyright 2011 Sybren A. Stüvel <sybren@stuvel.eu>
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+"""ASN.1 definitions.
+
+Not all ASN.1-handling code use these definitions, but when it does, they should be here.
+"""
+
+from pyasn1.type import univ, namedtype, tag
+
+
+class PubKeyHeader(univ.Sequence):
+    componentType = namedtype.NamedTypes(
+            namedtype.NamedType('oid', univ.ObjectIdentifier()),
+            namedtype.NamedType('parameters', univ.Null()),
+    )
+
+
+class OpenSSLPubKey(univ.Sequence):
+    componentType = namedtype.NamedTypes(
+            namedtype.NamedType('header', PubKeyHeader()),
+
+            # This little hack (the implicit tag) allows us to get a Bit String as Octet String
+            namedtype.NamedType('key', univ.OctetString().subtype(
+                    implicitTag=tag.Tag(tagClass=0, tagFormat=0, tagId=3))),
+    )
+
+
+class AsnPubKey(univ.Sequence):
+    """ASN.1 contents of DER encoded public key:
+
+    RSAPublicKey ::= SEQUENCE {
+         modulus           INTEGER,  -- n
+         publicExponent    INTEGER,  -- e
+    """
+
+    componentType = namedtype.NamedTypes(
+            namedtype.NamedType('modulus', univ.Integer()),
+            namedtype.NamedType('publicExponent', univ.Integer()),
+    )