8488b84136
This PR modifies get_server_certificate() to use tls_sockets() rather than $OPENSSL for finding certificates using SSLv3 - TLSv1.2, unless $SSL_NATIVE is true. Using tls_sockets() allows testssl.sh to find certificates used by the server even if the server is only using cipher suites not supported by $OPENSSL. This may happen, for example, if the server only supports TLS_ECDHE_ cipher suites with curve X25519 and a version of OpenSSL prior to 1.1.0 is being used. A less likely possibility would be if the server had a certificate with a DH key, and a newer version of OpenSSL that does not support TLS_DH_ cipher suites is being used. Since tls_sockets() cannot be used to obtain session tickets from the server, an additional test for session ticket lifetime needed to be added. In order to reduce the number of times the server needs to be queried for certificates, this PR bundles the testing in a similar way to what is already done to test for cipher suites. Currently, each call to get_server_certificate() only tests for one type of certificate. This PR has each call test for more than one type of certificate. For example, one call is made to test for ECDSA, ECDH, DH, DSA, and GOST certificates. If the test is unsuccessful, then the server has none of these certificates. If the test finds a certificate (e.g., an ECDSA) certificate, then another test is run looking for the remaining types (ECDH, DH, DSA, and GOST) until a test is unsuccessful. For most servers, this will reduce the number of calls to get_server_certificate() from 8 or 9 to 4 or 6. |
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| .github | ||
| bin | ||
| doc | ||
| etc | ||
| t | ||
| utils | ||
| .gitignore | ||
| .travis.yml | ||
| CHANGELOG.stable-releases.txt | ||
| CREDITS.md | ||
| Dockerfile | ||
| Dockerfile.md | ||
| LICENSE | ||
| Readme.md | ||
| openssl-iana.mapping.html | ||
| testssl.sh | ||
Readme.md
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
- Ease of installation: Linux, OSX/Darwin, FreeBSD, NetBSD, MSYS2/Cygwin, WSL work out of the box (OpenBSD needs bash). No need to install or to configure something. No gems, CPAN, pip or the like
- 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. In addition starting from version 3.0rc1 if you're offering a scanner based on testssl.sh as a public and / or paid service in the internet you need to mention to your audience that you're using this program and where to get this program from.
Installation
You can download testssl.sh by cloning this git repository:
git clone --depth 1 https://github.com/drwetter/testssl.sh.git
Or help yourself downloading the ZIP archive
https://github.com/drwetter/testssl.sh/archive/2.9dev.zip. testssl.sh --help
will give you some help upfront. More help: see doc directory with
man pages. Older sample runs are at https://testssl.sh/.
Running a docker container from dockerhub
docker run -ti drwetter/testssl.sh <your_cmd_line>
Status
In the 2.9dev branch we're developing the 3.0 release. We're currently in the release candidate phase. That means you can and should use it for production and let us know if you encounter any additional bugs.
For the previous stable version please see release 2.9.5 which is is the successor of 2.8 and stable for day-to-day work. Support for 2.9.5 will be soon dropped. 2.8 is not supported anymore.
Compatibility
testssl.sh is working on every Linux/BSD distribution out of the box. Since 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 system out of the box, supposed they have
/bin/bash >= version 3.2 and standard tools like sed and awk installed.
System V needs to have GNU grep installed. MacOS X and Windows (using MSYS2 or
cygwin) work too. OpenSSL version version >= 1.0.2 is recommended for better
LOGJAM checks and to display bit strengths for key exchanges.
Update notification here or @ twitter.
Features implemented in 2.9dev (as opposed to 2.9.5)
- Full support of TLS 1.3, shows also drafts supported
- ROBOT check
- Better TLS extension support
- Better OpenSSL 1.1.1 support
- DNS over Proxy and other proxy improvements
- Decoding of unencrypted BIG IP cookies
- Better JSON output: renamed IDs and findings shorter/better parsable
- JSON output now valid also for non-responding servers
- Testing now per default 370 ciphers
- Further improving the robustness of TLS sockets (sending and parsing)
- Support of supplying timeout value for
openssl connect-- useful for batch/mass scanning - File input for serial or parallel mass testing can be also in nmap grep(p)able (-oG) format
- LOGJAM: now checking also for DH and FFDHE groups (TLS 1.2)
- PFS: Display of elliptical curves supported, DH and FFDHE groups (TLS 1.2 + TLS 1.3)
- Check for session resumption (Ticket, ID)
- TLS Robustness check (GREASE)
- Expect-CT Header Detection
- --phone-out does certificate revocation checks via OCSP (LDAP+HTTP) and with CRL
- Fully OpenBSD and LibreSSL support
- Missing SAN warning
- Added support for private CAs
- Man page reviewed
- Better error msg suppression (not fully installed OpenSSL)
- Way better handling of connectivity problems
- Exit codes better: 0 for running without error, 1+n for small errors, >240 for major errors.
- Dockerfile and repo @ docker hub with that file (see above)
- Java Root CA store added
- Better support for XMPP via STARTTLS & faster
- Certificate check for to-name in stream of XMPP
- Support for NNTP via STARTTLS
- More robustness for any STARTTLS protocol (fall back to plaintext while in TLS)
- Fixed TCP fragmentation
- Added
--ids-friendlyswitch
Documentation
- There's a man page in groff, html and markdown format in
~/doc/. - https://testssl.sh/ will help to get you started.
- Will Hunt provides a longer, good description for the version 2.8, including useful background info.
Contributions
Contributions, feedback, bug reports are welcome! For contributions please note: One patch per feature -- bug fix/improvement. Please test your changes thoroughly as reliability is important for this project.
There's a coding guideline.
Bug reports
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 ;-)
External/related projects
Please address questions not specifically to the code of testssl.sh to the respective projects