https://github.com/keygen-sh/example-node-cryptographic-license-files
Example of verifying cryptographically signed and encrypted license files using Node, Ed25519 and AES-256-GCM.
https://github.com/keygen-sh/example-node-cryptographic-license-files
Last synced: 3 months ago
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Example of verifying cryptographically signed and encrypted license files using Node, Ed25519 and AES-256-GCM.
- Host: GitHub
- URL: https://github.com/keygen-sh/example-node-cryptographic-license-files
- Owner: keygen-sh
- License: mit
- Created: 2024-04-10T14:48:20.000Z (over 1 year ago)
- Default Branch: master
- Last Pushed: 2024-04-10T15:27:43.000Z (over 1 year ago)
- Last Synced: 2025-06-09T03:38:31.884Z (4 months ago)
- Language: JavaScript
- Size: 8.79 KB
- Stars: 1
- Watchers: 2
- Forks: 3
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Example Node Cryptographic License Files
This is an example of how to verify and decrypt [cryptographic license files](https://keygen.sh/docs/api/cryptography/#cryptographic-lic)
in Node, using Ed25519 signing and AES-256-GCM encryption. This example
verifies the `aes-256-gcm+ed25519` algorithm.
## Running the example
First up, add an environment variable containing your **DER-encoded** Ed25519 public key:
```bash
export KEYGEN_PUBLIC_KEY='MCowBQYDK2VwAyEA6GAeSLaTg7pSAkX9B5cemD0G0ixCV8/YIwRgFHnO54g='
```
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 [`yarn`](https://yarnpkg.com):
```
yarn
```
Then run the script, passing in a `path` to a license file, and a `license`
key as arguments:
```bash
yarn start --license 'A_LICENSE_KEY' --path /etc/keygen/license.lic
```
Or run one of the pre-defined examples:
```bash
KEYGEN_PUBLIC_KEY='MCowBQYDK2VwAyEA6GAeSLaTg7pSAkX9B5cemD0G0ixCV8/YIwRgFHnO54g=' yarn start \
--license 'DC00E8-CC6DA1-2E35BF-BBDC02-E80494-V3' \
--path examples/license.lic
```
The following will happen:
1. The license file's authenticity will be verified using Ed25519, by verifing
its signature using the public key.
1. The license file will be decrypted using the license key
as the decryption key.
If everything checks out, the script will print the decrypted contents of
the license file — the license object, with any included data. If it
fails, check your inputs.
## Questions?
Reach out at [support@keygen.sh](mailto:support@keygen.sh) if you have any
questions or concerns!