prosody-modules
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mod_s2s_keysize_policy/README.markdown
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mod_http_oauth2: Advertise the currently supported id_token signing algorithm
This field is REQUIRED. The algorithm RS256 MUST be included, but isn't
because we don't implement it, as that would require implementing a pile
of additional cryptography and JWT stuff. Instead the id_token is
signed using the client secret, which allows verification by the client,
since it's a shared secret per OpenID Connect Core 1.0 § 10.1 under
Symmetric Signatures.
OpenID Connect Discovery 1.0 has a lot of REQUIRED and MUST clauses that
are not supported here, but that's okay because this is served from the
RFC 8414 OAuth 2.0 Authorization Server Metadata .well-known endpoint!
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Sun, 30 Apr 2023 16:13:40 +0200 |
| parent | 1895:101078d9cc27 |
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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).
