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Brute forcing jwt tokens signed with HS256 since 2014
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README.md

jwtbrute

jwtbrute.exe takes a new line delimited list of canidate secrets in via stdin and tests them against a provided json web token to see if they were the secret used in the signing of the token. If the secret is discovered one can sign arbitry jwt tokens to bypass the authentication process of most webservices.

Example Usage

echo secret| jwtbrute.exe eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOjEyMzQ1Njc4OTAsIm5hbWUiOiJKb2huIERvZSIsImFkbWluIjp0cnVlfQ.eoaDVGTClRdfxUZXiPs3f8FmJDkDE_VCQFXqKxpLsts

Output

Secret was: secret

License

The MIT License (MIT)

Copyright (c) 2014-2015 Jmaxxz

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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