jwt-cracker
Simple HS256, HS384 & HS512 JWT token brute force cracker.Effective only to crack JWT tokens with weak secrets. Recommendation: Use strong long secrets or RS256 tokens.
Install
With npm:npm install --global jwt-crackerUsage
From command line:jwt-cracker -t <token> [-a <alphabet>] [--max <maxLength>] [-d <dictionaryFilePath>] [-f]Where:
- token: the full HS256-512 JWT token string to crack
- alphabet: the alphabet to use for the brute force (default: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
- maxLength: the max length of the string generated during the brute force (default: 12)
- dictionaryFilePath: path to a list of passwords (one per line) to use instead of brute force
- force: force script to execute when the token isn't valid
Requirements
This script requires Node.js version 16.0.0 or higherExample
Cracking the default jwt.io example:jwt-cracker -t eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.TJVA95OrM7E2cBab30RMHrHDcEfxjoYZgeFONFh7HgQ -a abcdefghijklmnopqrstuwxyz --max 6It takes about 2 hours in a Macbook Pro (2.5GHz quad-core Intel Core i7).
Or using a list of passwords taken from https://github.com/danielmiessler/SecLists
jwt-cracker -t eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.TJVA95OrM7E2cBab30RMHrHDcEfxjoYZgeFONFh7HgQ -d darkweb2017-top10000.txtIt takes less than a second.
