Mercurial > prosody-modules
view mod_s2s_keysize_policy/README.markdown @ 5925:32d1abb89dfe
mod_rest: Reject password that fails saslprep earlier (thanks tgy)
Prevents an error later if/when passing the password through saslprep a
second time in the authentication module, since the prep functions now
reject nil
The error reporting could be improved but that would involve adding a
way to pass errors back out of the check_credentials() function.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Thu, 04 Jul 2024 16:06:32 +0200 |
| parents | 101078d9cc27 |
| children |
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--- summary: Distrust servers with too small keys ... Introduction ============ This module sets the security status of s2s connections to invalid if their key is too small and their certificate was issued after 2014, per CA/B Forum guidelines. Details ======= Certificate Authorities were no longer allowed to issue certificates with public keys smaller than 2048 bits (for RSA) after December 31 2013. This module was written to enforce this, as there were some CAs that were slow to comply. As of 2015, it might not be very relevant anymore, but still useful for anyone who wants to increase their security levels. When a server is determined to have a "too small" key, this module sets its chain and identity status to "invalid", so Prosody will treat it as a self-signed certificate istead. "Too small" ----------- The definition of "too small" is based on the key type and is taken from [RFC 4492]. Type bits ------ ------ RSA 2048 DSA 2048 DH 2048 EC 233 Compatibility ============= Works with Prosody 0.9 and later. Requires LuaSec with [support for inspecting public keys](https://github.com/brunoos/luasec/pull/19).