nix-config/hosts/alexandria/kanidm.nix
William 258bcac597 Integrate Kanidm with Nextcloud via OIDC
Added Kanidm identity provider integration with Nextcloud:
- Enabled Kanidm client in kanidm.nix for CLI access
- Added user_oidc app to Nextcloud for OpenID Connect authentication
- Configured allow_local_remote_servers to permit Nextcloud to reach
  Kanidm at auth.baduhai.dev (resolves to local IP 192.168.15.142)

OAuth2 client configuration (done via kanidm CLI):
- Client ID: nextcloud
- Scopes: openid, email, profile mapped to idm_all_accounts group
- Redirect URI: https://cloud.baduhai.dev/apps/user_oidc/code
- User mapping: name claim maps to Nextcloud username

This allows users to authenticate to Nextcloud using their Kanidm
credentials, with existing Nextcloud accounts linked via username.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-08 23:56:40 -03:00

83 lines
2.2 KiB
Nix

{
config,
lib,
inputs,
pkgs,
...
}:
let
utils = import ../../utils.nix { inherit inputs lib; };
inherit (utils) mkNginxVHosts;
kanidmCertDir = "/var/lib/kanidm/certs";
in
{
services.kanidm = {
enableServer = true;
enableClient = true;
package = pkgs.kanidm;
serverSettings = {
domain = "auth.baduhai.dev";
origin = "https://auth.baduhai.dev";
bindaddress = "127.0.0.1:8443";
ldapbindaddress = "127.0.0.1:636";
trust_x_forward_for = true;
# Use self-signed certificates for internal TLS
tls_chain = "${kanidmCertDir}/cert.pem";
tls_key = "${kanidmCertDir}/key.pem";
};
clientSettings = {
uri = "https://auth.baduhai.dev";
};
};
services.nginx.virtualHosts = mkNginxVHosts {
domains."auth.baduhai.dev" = {
locations."/" = {
proxyPass = "https://127.0.0.1:8443";
extraConfig = ''
proxy_ssl_verify off;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header Host $host;
'';
};
};
};
networking.firewall.allowedTCPPorts = [ 636 ];
# Generate self-signed certificates for kanidm's internal TLS
systemd.services.kanidm-generate-certs = {
description = "Generate self-signed TLS certificates for Kanidm";
wantedBy = [ "multi-user.target" ];
before = [ "kanidm.service" ];
serviceConfig = {
Type = "oneshot";
RemainAfterExit = true;
};
script = ''
mkdir -p ${kanidmCertDir}
if [ ! -f ${kanidmCertDir}/key.pem ]; then
${pkgs.openssl}/bin/openssl req -x509 -newkey rsa:4096 \
-keyout ${kanidmCertDir}/key.pem \
-out ${kanidmCertDir}/cert.pem \
-days 3650 -nodes \
-subj "/CN=localhost" \
-addext "subjectAltName=DNS:localhost,IP:127.0.0.1"
chown -R kanidm:kanidm ${kanidmCertDir}
chmod 600 ${kanidmCertDir}/key.pem
chmod 644 ${kanidmCertDir}/cert.pem
fi
'';
};
# Ensure certificate generation runs before kanidm starts
systemd.services.kanidm = {
after = [ "kanidm-generate-certs.service" ];
wants = [ "kanidm-generate-certs.service" ];
};
}