Plus, nmap will provide a strength rating of strong, weak, or unknown for each available cipher.įirst, download the ssl-enum-ciphers.nse nmap script ( explanation here). There is no better or faster way to get a list of available ciphers from a network service. Testing DHE-DSS-AES256-SHA.NO (sslv3 alert handshake failure)ĮDIT: Add flexibility as host and port are provided as parameter to the script Testing DHE-RSA-AES256-SHA.NO (sslv3 alert handshake failure) Testing ADH-AES256-SHA.NO (sslv3 alert handshake failure) Obtaining cipher list from OpenSSL 0.9.8k. Here's sample output showing 3 unsupported ciphers, and 1 supported cipher: ~]$. Result=$(echo -n | openssl s_client -cipher "$cipher" -connect $SERVER 2>&1) #!/usr/bin/env bashĬiphers=$(openssl ciphers 'ALL:eNULL' | sed -e 's/:/ /g')Įcho Obtaining cipher list from $(openssl version). If the handshake isn't successful, it prints NO, followed by the OpenSSL error text. If the handshake is successful, it prints YES. It gets a list of supported cipher suites from OpenSSL and tries to connect using each one. I wrote a bash script to test cipher suites. I think I can hack something together, but is there a simpler, more future-proof (e.g. So it seems I would need to test all cipher suites one at a time. GregS points out below that the SSL server picks from the cipher suites of the client. This question is motivated by the security testing I do for PCI and general penetration testing. I would prefer to do this on Linux, but Windows (or other) would be fine. I know I could grep through the hex dump of the conversation, but I was hoping for something a little more elegant. It just shows that the cipher suite is something with AES256-SHA. Verify return code: 20 (unable to get local issuer certificate) SSL handshake has read 1777 bytes and written 316 bytes Subject=/C=US/ST=California/L=Mountain View/O=Google Inc/CN=issuer=/C=ZA/O=Thawte Consulting (Pty) Ltd./CN=Thawte SGC CA Z5nRUP8pJcA2NhUzUnC+MY+f6H/nEQyNv4SgQhqAibAxWEEHXw= U2ONgJd8IyAPkU0Wueru9G2Jysa9zCRo1kNbzipYvzwY4OA8Ys+WAi0oR1A04Se6 ZS5jb20vcmVwb3NpdG9yeS9UaGF3dGVfU0dDX0NBLmNydDANBgkqhkiG9w0BAQUFĪAOBgQCfQ89bxFApsb/isJr/aiEdLRLDLE5a+RLizrmCUi3nHX4adpaQedEkUjh5 Oi8vb2NzcC50aGF3dGUuY29tMD4GCCsGAQUFBzAChjJodHRwOi8vd3d3LnRoYXd0 LmNvbS9UaGF3dGVTR0NDQS5jcmwwKAYDVR0lBCEwHwYIKwYBBQUHAwEGCCsGAQUFīwMCBglghkgBhvhCBAEwcgYIKwYBBQUHAQEEZjBkMCIGCCsGAQUFBzABhhZodHRw GtXj9xVoRaELGYW84u+E593y17iYwqG7tcFR39SDAqc9BkJb4SLD3muFXxzW2k6LĠ5vuuWciKh0R73mkszeK9P4Y/bz5RiNQl/Os/CRGK1w7t0UCAwEAAaOB5zCB5DAMīgNVHRMBAf8EAjAAMDYGA1UdHwQvMC0wK6ApoCeGJWh0dHA6Ly9jcmwudGhhd3Rl GYEA6PmGD5D6htffvXImttdEAoN4c9kCKO+IRTn7EOh8rqk41XXGOOsKFQebg+jN MRYwFAYDVQQHFA1Nb3VudGFpbiBWaWV3MRMwEQYDVQQKFApHb29nbGUgSW5jMRcwįQYDVQQDFA53d3cuZ29vZ2xlLmNvbTCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkC MTEyMTgyMzU5NTlaMGgxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpDYWxpZm9ybmlh THRkLjEWMBQGA1UEAxMNVGhhd3RlIFNHQyBDQTAeFw0wOTEyMTgwMDAwMDBaFw0x MIIDITCCAoqgAwIBAgIQL9+89q6RUm0PmqPfQDQ+mjANBgkqhkiG9w0BAQUFADBM I:/C=US/O=VeriSign, Inc./OU=Class 3 Public Primary Certification Authority Verify error:num=20:unable to get local issuer certificateĠ s:/C=US/ST=California/L=Mountain View/O=Google Inc/CN=i:/C=ZA/O=Thawte Consulting (Pty) Ltd./CN=Thawte SGC CAġ s:/C=ZA/O=Thawte Consulting (Pty) Ltd./CN=Thawte SGC CA I've tried openssl, but if you examine the output: $ echo -n | openssl s_client -connect CONNECTED(00000003)ĭepth=1 /C=ZA/O=Thawte Consulting (Pty) Ltd./CN=Thawte SGC CA How can I retrieve a list of the SSL/TLS cipher suites a particular website offers?
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