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!

# This is a simple ruleset to block all traffic from servers
# on the JabberSPAM blocklist. Even traffic from existing user
# contacts will be blocked.
#
# Example config (make sure "firewall" is in modules_enabled):
#
#   firewall_scripts = { "module:scripts/jabberspam-simple-blocklist.pfw" }
#
# For a more advanced ruleset, consider using spam-blocking.pfw
# and spam-blocklists.pfw.

%LIST blocklist: https://cdn.jsdelivr.net/gh/jabberspam/blacklist/blacklist.txt

::deliver

CHECK LIST: blocklist contains $<@from|host>
BOUNCE=policy-violation (Your server is blocked due to spam)