testssl.sh is a free command line tool which checks a server's service on
any port for the support of TLS/SSL ciphers, protocols as well as some
cryptographic flaws.
- Clear output: you can tell easily whether anything is good or bad
- Ease of installation: It works for Linux, Darwin, FreeBSD, NetBSD and MSYS2/Cygwin out of the box: no need to install or configure something, no gems, CPAN, pip or the like.
- Flexibility: You can test any SSL/TLS enabled and STARTTLS service, not only webservers at port 443
- Toolbox: Several command line options help you to run YOUR test and configure YOUR output
- Reliability: features are tested thoroughly
- Verbosity: If a particular check cannot be performed because of a missing capability on your client side, you'll get a warning
- Privacy: It's only you who sees the result, not a third party
- Freedom: It's 100% open source. You can look at the code, see what's going on and you can change it.
- Heck, even the development is open (github)
Here in the 2.9dev branch you find the development version of the software -- with new features and maybe some bugs. For the stable version and a more thorough description of the command line options please see testssl.sh or https://github.com/drwetter/testssl.sh/wiki/Usage-Documentation.
testssl.sh is working on every Linux/BSD distribution out of the box. In 2.9dev most
of the limitations of disabled features from the openssl client are gone due to bash-socket-based
checks. testssl.sh also works on otherunixoid system out of the box, supposed they have
/bin/bash and standard tools like sed and awk installed. System V needs to have GNU versions
of grep and sed installed. MacOS X and Windows (using MSYS2 or cygwin) work too. OpenSSL
version >= 1 is a must. OpenSSL version >= 1.0.2 is needed for better LOGJAM checks and to
display bit strengths for key exchanges.
Update notification here or @ twitter.
Features implemented in 2.9dev
- Support of supplying timeout value for
openssl connect-- useful for batch/mass scanning - TLS 1.2 protocol check via socket
- Further tests via TLS sockets and improvements (handshake parsing, completeness, robustness)
- Finding more TLS extensions via sockets
- Using bash sockets where ever possible
- TLS Supported Groups Registry (RFC 7919), key shares extension
- Non-flat JSON support
- File output (CSV, JSON flat, JSON non-flat) supports a minimum severity level (only above supplied level there will be output)
- Native HTML support instead going through 'aha'
- Testing 359 default ciphers (
testssl.sh -e) with a mixture of sockets and openssl. Same speed as with openssl only but addtional ciphers such as post-quantum ciphers, new CHAHA20/POLY1305, CamelliaGCM etc. - LUCKY13 and SWEET32 checks
- LOGJAM: now checking also for known DH parameters
- Check for CAA RR
- Check for OCSP must staple
- Better formatting of output (indentation)
- Choice showing the RFC naming scheme only
Contributions, feedback, bug reports are welcome! For contributions please note: One patch per feature -- bug fix/improvement. Please test your changes thouroughly as reliability is important for this project.
There's a coding guideline.
Please file bug reports @ https://github.com/drwetter/testssl.sh/issues.
For a start see the wiki. Help is needed here.
Please file bugs in the issue tracker. Do not forget to provide detailed information, see https://github.com/drwetter/testssl.sh/wiki/Bug-reporting. (Nobody can read your thoughts -- yet. And only agencies your screen) ;-)
Please address questions not specifically to the code of testssl.sh to the respective projects