Add the ability so provide an image file as the infile. If the file contains a QR code generated by Google Authenticator's "Transfer Accounts" function, it will be decoded directly in a single step. This is meant to help users who need to access their secrets from Google Authenticator but don't have a QR code decoder and don't want to use an online one due to security concerns.

test_extract_qrcode_unittest.py

@@ -0,0 +1,79 @@
+# Unit test for extract_otp_secret_keys.py
+
+# Run tests:
+# python -m unittest
+
+# Author: sssudame
+
+# 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 <https://www.gnu.org/licenses/>.
+
+import unittest
+from utils import Capturing
+
+import extract_otp_secret_keys
+
+
+class TestExtract(unittest.TestCase):
+    def test_happy_path(self):
+        with Capturing() as actual_output:
+            extract_otp_secret_keys.main(['test/test_googleauth_export.png'])
+
+        expected_output =\
+        ['Name:    Test1:test1@example1.com', 'Secret:  JBSWY3DPEHPK3PXP', 'Issuer:  Test1', 'Type:    totp', '',
+         'Name:    Test2:test2@example2.com', 'Secret:  JBSWY3DPEHPK3PXQ', 'Issuer:  Test2', 'Type:    totp', '',
+         'Name:    Test3:test3@example3.com', 'Secret:  JBSWY3DPEHPK3PXR', 'Issuer:  Test3', 'Type:    totp', '']
+
+        self.assertEqual(actual_output, expected_output)
+
+    def test_no_qr_code_in_image(self):
+        with Capturing() as actual_output:
+            extract_otp_secret_keys.main(['test/lena_std.tif'])
+
+        expected_output =\
+        ['', 'ERROR: Unable to read QR Code from file.', 'input file: test/lena_std.tif']
+
+        self.assertEqual(actual_output, expected_output)
+
+    def test_nonexistent_file(self):
+        with Capturing() as actual_output:
+            extract_otp_secret_keys.main(['test/nonexistent.bmp'])
+
+        expected_output =\
+        ['', 'ERROR: Input file provided is non-existent or not a file.', 'input file: test/nonexistent.bmp']
+
+        self.assertEqual(actual_output, expected_output)
+
+
+    def test_non_image_file(self):
+        with Capturing() as actual_output:
+            extract_otp_secret_keys.main(['test/text_masquerading_as_image.jpeg'])
+
+        expected_output =\
+        ['', 'ERROR: Unable to open file for reading. Please ensure that you have read access to the file and that '
+             'the file is a valid image file.', 'input file: test/text_masquerading_as_image.jpeg']
+
+        self.assertEqual(actual_output, expected_output)
+
+    def setUp(self):
+        self.cleanup()
+
+    def tearDown(self):
+        self.cleanup()
+
+    def cleanup(self):
+        pass
+
+
+if __name__ == '__main__':
+    unittest.main()