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JWTrek

JWT Token C# Cracker

To crack JWT tokens.

  • HS128, HS256, HS384, HS512 support
  • Bruteforce
  • Wordlist

JWTrek screenshot

Usage

Launch EXE and follow the prompt:

  • Token or token file path: the full JWT token string to crack or the file path that contains the token (prefered for long token)
  • Mode[BRUTEFORCE]:
    • Charset: the alphabet to use for the brute force (default: "abcdefghijklmnopqrstuvwxyz0123456789")
    • Length: the length of the string generated during the brute force (default: 6)
  • Mode[WORDLIST]:
    • Wordlist path: the wordlist file path (one word per line)

Requirements

This software requires .NET 4.5.2 or higher

Example

Cracking the default jwt.io example:

TOKEN > eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiYWRtaW4iOnRydWV9.TJVA95OrM7E2cBab30RMHrHDcEfxjoYZgeFONFh7HgQ
CHARSET > abcdefghijklmnopqrstuvwxyz
LENGTH > 6

It takes about 15 minutes with a Lenovo T550 (Intel Core i5-5300U @ 2.30 Ghz).

Contributing

Everyone is very welcome to contribute to this project.

Operational version

An operational version (.EXE) is available for download here: www.georgestaupin.com

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JWT Token C# Cracker (HS128, HS256, HS384, HS512)

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