Example Python Response Signature Verification

This is an example of verifying response signatures in Python using your Keygen account's unique Ed25519 public key. You can find your public key within your account's settings page.

Verifying response signatures will help prevent man-in-the-middle and replay attacks, where the attacker redirects traffic from your licensing server (e.g. Keygen) to their own locally controlled server. Other examples are when you have cached an API response locally and want to verify its integrity (i.e. it has not been tampered with).

Running the example

First up, configure a few environment variables:

# Your Keygen account's Ed25519 hex-encoded verify key
export KEYGEN_PUBLIC_KEY="YOUR_KEYGEN_ED25519_VERIFY_KEY"

# Your Keygen product token (don't share this!)
export KEYGEN_PRODUCT_TOKEN="YOUR_KEYGEN_PRODUCT_TOKEN"

# Your Keygen account ID
export KEYGEN_ACCOUNT_ID="YOUR_KEYGEN_ACCOUNT_ID"

You can either run each line above within your terminal session before starting the app, or you can add the above contents to your ~/.bashrc file and then run source ~/.bashrc after saving the file.

Next, install dependencies with pip:

python3 -m pip install -r requirements.txt

Then run the script with the route you want to fetch:

python3 main.py '/licenses/442160c6-20d2-44a7-883d-245e38f651fd'
python3 main.py '/users/dbe63060-eee7-4c87-98fa-f133fb8131fa'
python3 main.py '/machines?page[number]=1&page[size]=5'

The above commands will only succeed if the signature verification is successful, so be sure to copy your public key correctly. You can find your public key within your account's settings page.

Questions?

Reach out at [email protected] if you have any questions or concerns!