3756cdcb38
This commit makes some minor improvements to code that converts ASCII-HEX to binary. First, testssl.sh currently has two functions that do the same thing: asciihex_to_binary() and hex2ascii(). This commit all calls to either of these functions with calls to hex2binary(), which is based on the current asciihex_to_binary(). This commit also changes direct use of printf to calls to hex2ascii() in generate-ccm-counter-blocks(), ccm-compute-tag(), and generate_gcm_counter(). Finally, this commit cleans up the implemention of hex2binary() a bit and introduces the option to use xxd, if that program is available. Using xxd rather than multiple calls to printf has a couple of advantages. xxd is a bit faster. However, the primary advantage is that when debugging (i.e., using bash -x), each call to hex2binary() only includes a few steps, regardless of how long the string is, whereas using printf the call to hex2binary() could take hundreds of steps. |
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|---|---|---|
| .github/ISSUE_TEMPLATE | ||
| bin | ||
| doc | ||
| etc | ||
| t | ||
| utils | ||
| .gitignore | ||
| .travis.yml | ||
| CHANGELOG.md | ||
| Coding_Convention.md | ||
| CONTRIBUTING.md | ||
| CREDITS.md | ||
| Dockerfile | ||
| Dockerfile.md | ||
| LICENSE | ||
| openssl-iana.mapping.html | ||
| Readme.md | ||
| testssl.sh | ||
Intro
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.
Key features
- Clear output: you can tell easily whether anything is good or bad.
- Machine readable output (CSV, two JSON formats)
- No need to install or to configure something. No gems, CPAN, pip or the like.
- Works out of the box: Linux, OSX/Darwin, FreeBSD, NetBSD, MSYS2/Cygwin, WSL (bash on Windows). Only OpenBSD needs bash.
- A Dockerfile is provided, there's also an offical container build @ dockerhub.
- Flexibility: You can test any SSL/TLS enabled and STARTTLS service, not only web servers at port 443.
- Toolbox: Several command line options help you to run your test and configure your output.
- Reliability: features are tested thoroughly.
- 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.
- The development is open (github) and participation is welcome.
License
This software is free. You can use it under the terms of GPLv2, see LICENSE.
Attribution is important for the future of this project -- also in the internet. Thus if you're offering a scanner based on testssl.sh as a public and/or paid service in the internet you are strongly encouraged to mention to your audience that you're using this program and where to get this program from. That helps us to get bugfixes, other feedback and more contributions.
Compatibility
Testssl.sh is working on every Linux/BSD distribution out of the box. Latest by 2.9dev
most of the limitations of disabled features from the openssl client are gone
due to bash-socket-based checks. As a result you can also use e.g. LibreSSL or OpenSSL >=
1.1.1 . testssl.sh also works on other unixoid systems out of the box, supposed they have
/bin/bash >= version 3.2 and standard tools like sed and awk installed. An implicit
(silent) check for binaries is done when you start testssl.sh . System V needs probably
to have GNU grep installed. MacOS X and Windows (using MSYS2, Cygwin or WSL) work too.
Update notification here or @ twitter.
Installation
You can download testssl.sh branch 3.1dev just by cloning this git repository:
git clone --depth 1 https://github.com/drwetter/testssl.sh.git
Think of 3.1dev like a rolling release, see below. For the stable version help yourself by downloading the ZIP or tar.gz archive. Just cd to the directory created (=INSTALLDIR) and run it off there.
Docker
Testssl.sh has minimal requirements. As stated you don't have to install or build anything. You can just run it from the pulled/cloned directory. Still if you don't want to pull the github repo to your directory of choice you can pull a container from dockerhub and run it:
docker run --rm -ti drwetter/testssl.sh <your_cmd_line>
Or if you have cloned this repo you also can just cd to the INSTALLDIR and run
docker build . -t imagefoo && docker run --rm -t imagefoo example.com
For more please consult Dockerfile.md.
Status
We're currently in the development phase, version 3.1dev. 3.1dev will eventually become 3.2. Bigger features are developed in a separate branch before merged into 3.1dev to avoid hiccups or inconsistencies. Albeit we try to keep 3.1dev as solid as possible things will certainly change in 3.1dev. Think of the 3.1dev branch like a rolling release. So if you need stability the 3.0 branch is better for you.
Version 3.0.X receives bugfixes, labeled as 3.0.1, 3.0.2 and so on. This will happen until 3.2 is released.
Support for 2.9.5 has been dropped. Supported is >= 3.0.x only.
Documentation
- .. it is there for reading. Please do so :-) -- at least before asking questions. See man page in groff, html and markdown format in
~/doc/. - https://testssl.sh/ will help to get you started.
- For the (older) version 2.8 will Hunt provides a longer, good description, including useful background info.
Contributing
Contributions are welcome! See CONTRIBUTING.md for details. Please also have a look at the Coding Convention.
Bug reports
Bug reports are important. It makes this project more robust.
Please file bugs in the issue tracker @ github. Do not forget to provide detailed information, see template for issue, and further details @ https://github.com/drwetter/testssl.sh/wiki/Bug-reporting. Nobody can read your thoughts -- yet. And only agencies your screen ;-)
You can also debug yourself, see here.
External/related projects
Please address questions not specifically to the code of testssl.sh to the respective projects below.
Web frontend
Free to use Web frontend + commercial API
Mass scanner w parallel scans and elastic searching the results
Another ready-to-go docker image is at:
Privacy checker using testssl.sh
Nagios / Icinga Plugins
- https://github.com/dnmvisser/nagios-testssl (Python 3)
- https://gitgud.malvager.net/Wazakindjes/icinga2_plugins/src/master/check_testssl.sh (Shell)