Extract two-factor authentication (2FA, TFA) secret keys from export QR codes of "Google Authenticator" app
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Export the QR codes from "Google Authenticator" app
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Read QR codes with QR code reader
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Save the captured QR codes in a text file. Save each QR code on a new line. (The captured QR codes look like
otpauth-migration://offline?data=...
) -
Call this script with the file as input:
python extract_otp_secret_keys.py -q example_export.txt
The protobuf package of Google for proto3 is required for running this script.
pip install protobuf
For printing QR codes, the qrcode module is required
pip install qrcode[pil]
The export QR code of "Google Authenticator" contains the URL otpauth-migration://offline?data=...
.
The data parameter is a base64 encoded proto3 message (Google Protocol Buffers).
Command for regeneration of Python code from proto3 message definition file (only necessary in case of changes of the proto3 message definition):
protoc --python_out=generated_python google_auth.proto
- Proto3 documentation: https://developers.google.com/protocol-buffers/docs/pythontutorial
- Template code: beemdevelopment/Aegis#406