sslscan  1.10.2
About: SSLScan queries SSL services, such as HTTPS, in order to determine the ciphers that are supported (a fork of an older sslscan).
  Fossies Dox: sslscan-1.10.2.tar.gz  ("inofficial" and yet experimental doxygen-generated source code documentation)  

sslscan Documentation

Some Fossies usage hints in advance:

  1. To see the Doxygen generated documentation please click on one of the items in the steelblue colored "quick index" bar above or use the side panel at the left which displays a hierarchical tree-like index structure and is adjustable in width.
  2. If you want to search for something by keyword rather than browse for it you can use the client side search facility (using Javascript and DHTML) that provides live searching, i.e. the search results are presented and adapted as you type in the Search input field at the top right.
  3. Doxygen doesn't incorporate all member files but just a definable subset (basically the main project source code files that are written in a supported language). So to search and browse all member files you may visit the Fossies
  4. sslscan-1.10.2.tar.gz contents page and use the Fossies standard member browsing features (also with source code highlighting and additionally with optional code folding).


SSLScan queries SSL services, such as HTTPS, in order to determine the ciphers that are supported. SSLScan is designed to be easy, lean and fast. The output includes preferred ciphers of the SSL service, the certificate and is in Text and XML formats.



  • OpenSSL 1.0.0 or better
  • gcc
  • make

Makefile build:

make install        (as root)

SSLScan can be built manually using the following command:

gcc -lssl -o sslscan sslscan.c


To scan a HTTPS service:


To display more information:

sslscan --help



Published under the GPLv3 (see LICENSE for more information)

Most of the pre-TLS protocol setup was inspired by the OpenSSL s_client.c program.

Some of the OpenSSL setup code was borrowed from The Tor Project's Tor program. Thus it is likely proper to comply with the BSD license by saying: Copyright (c) 2007-2010, The Tor Project, Inc.

Projects using SSLScan