Steven Harradine stevenharradine
stevenharradine
/ node-tls-detect.js
Last active
September 11, 2015 14:01
— forked from tg-x/node-tls-detect.js
TLS detection for node.js
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| /* | |
| * Autodetect if SSL/TLS is used by having a look at the first incoming bytes | |
| * This technique is from http://webview.jabberd.org/cgi-bin/viewvc.cgi/trunk/jadc2s/clients.cc?view=markup | |
| * | |
| * used heuristic: | |
| * - an incoming connection using SSLv3/TLSv1 records should start with 0x16 | |
| * - an incoming connection using SSLv2 records should start with the record size | |
| * and as the first record should not be very big we can expect 0x80 or 0x00 (the MSB is a flag) | |
| * - everything else is considered to be unencrypted | |
| */ |