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mod_tls_policy/README.markdown @ 1842:98ad01cc83cf
mod_tls_policy: Add README
author | Kim Alvefur <zash@zash.se> |
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date | Sat, 12 Sep 2015 21:02:33 +0200 |
child | 1843:032b209bb8ff |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_tls_policy/README.markdown Sat Sep 12 21:02:33 2015 +0200 @@ -0,0 +1,43 @@ +% Cipher policy enforcement with application level error reporting + +# Introduction + +This module arose from discussions at the XMPP Summit about enforcing +better ciphers in TLS. It may seem attractive to disallow some +insecure ciphers or require forward secrecy, but doing this at the TLS +level would the user with an unhelpful "Encryption failed" message. +This module does this enforcing at the application level, allowing +better error messages. + +# Configuration + +First, download and add the module to `module_enabled`. Then you can +decide on what policy you want to have. + +Requiring ciphers with forward secrecy is the most simple to set up. + +``` lua +tls_policy = "FS" -- allow only ciphers that enable forward secrecy +``` + +A more complicated example: + +``` lua +tls_policy = { + c2s = { + encryption = "AES"; -- Require AES (or AESGCM) encryption + protocol = "TLSv1.2"; -- and TLSv1.2 + bits = 128; -- and at least 128 bits (FIXME: remember what this meant) + } + s2s = { + cipher = "AESGCM"; -- Require AESGCM ciphers + protocol = "TLSv1.[12]"; -- and TLSv1.1 or 1.2 + authentication = "RSA"; -- with RSA authentication + }; +} +``` + +# Compatibility + +Requires LuaSec 0.5 +