Jwtear – Modular Command-Line Tool To Parse, Create And Manipulate JWT Tokens For Hackers
A modular command-line tool to parse, create and manipulate JSON Web Token(JWT) tokens for security testing purposes.
Features
- Complete modularity.
- All commands are plugins.
- Easy to add new plugins.
- Support JWS and JWE tokens.
- Easy interface for plugins. (follow the template example)
- Flexible
- token generation based on production-class libraries (e.g. json-jwt, jwe).
Available plugins
- Parse: parses jwt tokens.
- jws: manipulate and generate JWS tokens.
- jwe: manipulate and generate JWE tokens.
- bruteforce: brutefocing JWS signing key
- wiki: contains offline information about JWT, attacks ideas, references.
Installation
install it yourself as:
$ gem install jwtear
Usage
- Show the main menu
888888 888 888 88888888888
"88b 888 o 888 888
888 888 d8b 888 888
888 888 d888b 888 888 .d88b. 8888b. 888d888
888 888d88888b888 888 d8P Y8b "88b 888P"
888 88888P Y88888 888 88888888 .d888888 888
88P 8888P Y8888 888 Y8b. 888 888 888
888 888P Y888 888 "Y8888 "Y888888 888
.d88P v1.0.0
.d88P"
888P"
NAME
jwtear - Parse, create and manipulate JWT tokens.
SYNOPSIS
jwtear [global options] command [command options] [arguments...]
GLOBAL OPTIONS
-v, --version - Check current and latest version
-h, --help - Show this help message
COMMANDS
help - Shows a list of commands or help for one command
bruteforce, bfs - plugin to offline bruteforce and crack token's signature.
jws, s - Generate signature-based JWT (JWS) token.
jwe, e - Generate encryption-based JWT (JWE) token.
parse - Parse JWT token (accepts JWS and JWE formats).
wiki, w - A JWT wiki for hackers.
- Show a subcommand help, use
-h COMMAND
$jwtear -h jws
NAME
jws - Generate signature-based JWT (JWS) token.
SYNOPSIS
jwtear [global options] jws [command options]
DESCRIPTION
Generate JWS and JWE tokens.
COMMAND OPTIONS
-h, --header=JSON - JWT header (JSON format). eg. {"typ":"JWT","alg":"HS256"}. Run 'jwtear gen -l' for supported algorithms. (required, default: none)
-p, --payload=JSON - JWT payload (JSON format). eg. {"login":"admin"} (required, default: none)
-k, --key=PASSWORD|PUB_KEY_FILE - Key as a password string or a file public key. eg. P@ssw0rd | eg. public_key.pem (default: none)
- Use a plugin
plugins are defined as subcommands. Each subcommand may have one or more argument and/or switches.
$ jwtear parse -t eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.J8SS8VKlI2yV47C4BtfYukWPx_2welF34Mz7l-MNmkE
$ jwtear jws -h '{"alg":"HS256","typ":"JWT"}' -p '{"user":"admin"}' -k p@ss0rd123
$ jwtear jwe -header '{"enc":"A192GCM","typ":"JWT"}' --payload '{"user":"admin"}' --key public.pem
$ jwtear bruteforce -v -t eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyIjpudWxsfQ.Tr0VvdP6rVBGBGuI_luxGCOaz6BbhC6IxRTlKOW8UjM -l ~/tmp/pass.list
Add plugin
To add a new plugin, create a new ruby file under plugins
directory with the following structure
module JWTear
module CLI
extend GLI::App
extend JWTear::Helpers::Extensions::Print
extend JWTear::Helpers::Utils
desc "Plugin short description"
long_desc "Plugin long description"
command [:template, :pt] do |c|
c.action do |global, options, arguments|
print_h1 "Plugin template"
print_good "Hi, I'm a template."
template = TemplatePlugin.new
end
end
end
module Plugin
class TemplatePlugin
include JWTear::Helpers::Extensions::Print
include JWTear::Helpers::Utils
def initialize
check_dependencies
# ..code...
end
# ..code...
end
end
end
Instead of including all dependencies for each plugin into jwtear, you can add these dependencies as a hash to check_dependencies
method which will require the library and throw a gentle error to the user to install any missing gems.
The hash key is the gem name to install, the hash value is the require
string
deps = {'async-io' => 'async/ip'}
check_dependencies(deps)
Once the missing dependencies are installed by the user, the check_dependencies
will require them once the plugin class initiated.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/jwtear.
- Fork it ( https://github.com/KINGSABRI/jwtear/fork )
- Create your feature branch (
git checkout -b my-new-feature
) - Commit your changes (
git commit -am 'Add some feature'
) - Push to the branch (
git push origin my-new-feature
) - Create a new Pull Request
Areas to contribute
- contribution by reporting bugs.
- contribution by perfecting the current code.
- contribution by adding new plugins.
- contribution by enhancing the jwtear wiki.
- contribution by requesting features and/or plugins.
License
The gem is available as open source under the terms of the MIT License.