smokephil/extract_otp_secret_keys
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scito 2020-05-23 09:30:47 +02:00
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@ -6,11 +6,10 @@ Extract two-factor authentication (2FA, TFA) secret keys from export QR codes of
1. Export the QR codes from "Google Authenticator" app 1. Export the QR codes from "Google Authenticator" app
2. Read QR codes with QR code reader 2. Read QR codes with QR code reader
3. 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=...") 3. 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=...`)
4. Call this script with the file as input: 4. Call this script with the file as input:
```
python extract_otp_secret_keys.py -q example_export.txt python extract_otp_secret_keys.py -q example_export.txt
```
## Requirement ## Requirement
@ -26,10 +25,10 @@ For printing QR codes, the qrcode module is required
## Technical background ## Technical background
The export QR code of "Google Authenticator" contains the URL "otpauth-migration://offline?data=...". 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). 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 defintion): 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 protoc --python_out=generated_python google_auth.proto