Mercurial > prosody-modules
view mod_s2s_keysize_policy/README.markdown @ 5516:f25df3af02c1
mod_client_management: Include client software version number in listing
Should you ever wish to revoke a client by version number, e.g. for
security reasons affecting certain versions, then it would be good to at
the very least see which version is used.
Also includes the OAuth2 software ID, an optional unique identifier that
should be the same for all installations of a particular software.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Sat, 03 Jun 2023 19:21:39 +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).