Improves android backup parsing for check-backup and check-adb

tests/android/test_backup_parser.py

@@ -0,0 +1,50 @@
+# Mobile Verification Toolkit (MVT)
+# Copyright (c) 2021-2022 The MVT Project Authors.
+# Use of this software is governed by the MVT License 1.1 that can be found at
+#   https://license.mvt.re/1.1/
+
+import logging
+import hashlib
+
+from mvt.android.parsers.backup import parse_backup_file, parse_tar_for_sms
+
+from ..utils import get_artifact
+
+
+class TestBackupParsing:
+    def test_parsing_noencryption(self):
+        file = get_artifact("android_backup/backup.ab")
+        with open(file, "rb") as f:
+            data = f.read()
+        ddata = parse_backup_file(data)
+
+        m = hashlib.sha256()
+        m.update(ddata)
+        assert m.hexdigest() == "0799b583788908f06bccb854608cede375041ee878722703a39182edeb008324"
+        sms = parse_tar_for_sms(ddata)
+        assert isinstance(sms, list) == True
+        assert len(sms) == 1
+        assert len(sms[0]["links"]) == 1
+        assert sms[0]["links"][0] == "https://google.com/"
+
+    def test_parsing_encryption(self):
+        file = get_artifact("android_backup/backup2.ab")
+        with open(file, "rb") as f:
+            data = f.read()
+        ddata = parse_backup_file(data, password="123456")
+
+        m = hashlib.sha256()
+        m.update(ddata)
+        assert m.hexdigest() == "f365ace1effbc4902c6aeba241ca61544f8a96ad456c1861808ea87b7dd03896"
+        sms = parse_tar_for_sms(ddata)
+        assert isinstance(sms, list) == True
+        assert len(sms) == 1
+        assert len(sms[0]["links"]) == 1
+        assert sms[0]["links"][0] == "https://google.com/"
+
+
+
+
+
+
+