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## Intro
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[](https://travis-ci.org/drwetter/testssl.sh)
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[](https://gitter.im/drwetter/testssl.sh?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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`testssl.sh` is a free command line tool which checks a server's service on
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any port for the support of TLS/SSL ciphers, protocols as well as some
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cryptographic flaws.
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#### Key features
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* Clear output: you can tell easily whether anything is good or bad
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* Ease of installation: It works for Linux, Darwin, FreeBSD, NetBSD and
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MSYS2/Cygwin out of the box: no need to install or configure something,
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no gems, CPAN, pip or the like.
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* Flexibility: You can test any SSL/TLS enabled and STARTTLS service, not
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only webservers at port 443
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* Toolbox: Several command line options help you to run YOUR test and
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configure YOUR output
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* Reliability: features are tested thoroughly
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* Verbosity: If a particular check cannot be performed because of a missing
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capability on your client side, you'll get a warning
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* Privacy: It's only you who sees the result, not a third party
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* Freedom: It's 100% open source. You can look at the code, see what's
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going on and you can change it.
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* Heck, even the development is open (github)
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#### Status
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_ _Here in the master branch you find the stable version 2.8rc2 of the software, it
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superseds 2.6. Version 2.8 is currently being finalized_ _. The 2.9dev branch is the developement
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-- with new features and maybe some bugs. For the stable version and **a
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more thorough description of the command line options** please see
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[testssl.sh](https://testssl.sh/ "Go to the site with the stable version
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and more documentation") or https://github.com/drwetter/testssl.sh/wiki/Usage-Documentation.
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#### Compatibility
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testssl.sh is working on every Linux/BSD distribution out of the box with
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some limitations of disabled features from the openssl client -- some
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workarounds are done with bash-socket-based checks. It also works on other
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unixoid system out of the box, supposed they have `/bin/bash` and standard
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tools like sed and awk installed. MacOS X and Windows (using MSYS2 or
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cygwin) work too. OpenSSL version >= 1 is a must. OpenSSL version >= 1.0.2
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is needed for better LOGJAM checks and to display bit strengths for key
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exchanges.
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#### [Features in 2.8 stable](Readme.md#stable)
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Done so far:
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* Trust chain check against certificate stores from Apple (OS), Linux (OS),
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Microsoft (OS), Mozilla (Firefox Browser), works for openssl >=1.0.1
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* IPv6 (status: 80% working, details see
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https://github.com/drwetter/testssl.sh/issues/11
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* works now on servers requiring a x509 certificate for authentication
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* extensive CN <--> hostname check
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* SSL Session ID check
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* Avahi/mDNS based name resolution
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* HTTP2/ALPN protocol check
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* Logging to a file / dir
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* Logging to (flat) JSON + CSV
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* Check for multiple server certificates
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* Browser cipher simulation: what client will connect with which cipher + protocol
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* GOST cipher+certificate improvements
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* Assistance for color-blind users
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* Even more compatibility improvements for FreeBSD, NetBSD, Gentoo, RH-ish, F5 and Cisco systems
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* Considerable speed improvements for each cipher runs (-e/-E)
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* More robust SSLv2 + TLS socket interface
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* seperate check for curves
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* OpenSSL 1.1.0 compliant
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* check for DROWN
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* Whole number of bugs squashed
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Update notification here or @ [twitter](https://twitter.com/drwetter).
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#### [Features in 2.9dev](Readme.md#devel)
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* timeout in OpeenSL connect
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* TLS 1.2 protocol check via socket
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#### Contributions
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Contributions, feedback, bug reports are welcome! For contributions please
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note: One patch per feature -- bug fix/improvement. Please test your
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changes thouroughly as reliability is important for this project.
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There's [coding guideline](https://github.com/drwetter/testssl.sh/wiki/Coding-Style).
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Please file bug reports @ https://github.com/drwetter/testssl.sh/issues.
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#### Documentation
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For a start see the
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[wiki](https://github.com/drwetter/testssl.sh/wiki/Usage-Documentation).
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Help is needed here.
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#### Bug reports
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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
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-- yet. And only agencies your screen) ;-)
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----
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## External/related projects
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Please address questions not specifically to the code of testssl.sh to the
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respective projects
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#### Cool web frontend
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* https://github.com/TKCERT/testssl.sh-webfrontend
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#### mass scanner w parallel scans and elastic searching the results
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* https://github.com/TKCERT/testssl.sh-masscan
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#### Ready-to-go docker images are available at:
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* https://quay.io/repository/jumanjiman/testssl
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* https://hub.docker.com/r/mvance/testssl/
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#### Brew package
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* see [#233](https://github.com/drwetter/testssl.sh/issues/233) and
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[https://github.com/Homebrew/homebrew](https://github.com/Homebrew/homebrew)
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