Kryptografie/Tools

This section lists tools for checking the security settings.

SSL & TLS

Server checks via the web ssllabs.com offers a great way to check your webserver for misconfigurations. See https://www.ssllabs.com/ssltest/. Furthermore, ssllabs.com has a good best practices tutorial, which focuses on avoiding the most common mistakes in SSL. SSL Server certificate installation issues https://www.sslshopper.com/ssl-checker.html Check SPDY protocol support and basic TLS setup http://spdycheck.org/ XMPP/Jabber Server check (Client-to-Server and Server-to-Server) https://xmpp.net/ Luxsci SMTP TLS Checker https://luxsci.com/extranet/tlschecker.html DNSsec and DANE support of your domain and e-mail server? https://dane.sys4.de http://checktls.com is a tool for testing arbitrary TLS services. http://tls.secg.org is a tool for testing interoperability of HTTPS implementations for ECC cipher suites. http://www.whynopadlock.com/ Testing for mixed SSL parts loaded via http that can totally lever your HTTPS.

Browser Checks

Check your browser’s SSL capabilities: https://cc.dcsec.uni-hannover.de/ and https://www.ssllabs.com/ssltest/viewMyClient.html. Check Browsers SSL/TLS support and vulnerability to attacks: https://www.howsmyssl.com

Command Line Tools

https://sourceforge.net/projects/sslscan connects to a given SSL service and shows the cipher suites that are offered. http://www.bolet.org/TestSSLServer/ tests for BEAST and CRIME vulnerabilities. https://github.com/drwetter/testssl.sh checks a server’s service on any port for the support of TLS/SSL ciphers, protocols as well as some cryptographic flaws (CRIME, BREACH, CCS, Heartbleed). https://github.com/iSECPartners/sslyze Fast and full-featured SSL scanner. https://github.com/jvehent/cipherscan Fast TLS scanner (ciphers, order, protocols, key size and more) http://nmap.org/ nmap security scanner http://www.openssl.net OpenSSL s_client Monitoring TLS services with Zabbix (sorry, German) https://blog.sys4.de/zertifikate-uberwachen-mit-zabbix-de.html

Key length

http://www.keylength.com comprehensive online resource for comparison of key lengths according to common recommendations and standards in cryptography.

Random Number Generators

ENT is a pseudo random number generator sequence tester. Dieharder a random number generator testing tool. CAcert Random another random number generator testing service.

Guides

See: https://www.ssllabs.com/downloads/SSL_TLS_Deployment_Best_Practices.pdf.

Weblinks

1. https://bettercrypto.org/