nixpkgs/nixos/modules/services/security/oauth2_proxy_nginx.nix

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{ config, lib, ... }:
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with lib;
let
cfg = config.services.oauth2_proxy.nginx;
in
{
options.services.oauth2_proxy.nginx = {
proxy = mkOption {
type = types.str;
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default = config.services.oauth2_proxy.httpAddress;
defaultText = literalExpression "config.services.oauth2_proxy.httpAddress";
description = lib.mdDoc ''
The address of the reverse proxy endpoint for oauth2_proxy
'';
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};
virtualHosts = mkOption {
type = types.listOf types.str;
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default = [];
description = lib.mdDoc ''
A list of nginx virtual hosts to put behind the oauth2 proxy
'';
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};
};
config.services.oauth2_proxy = mkIf (cfg.virtualHosts != [] && (hasPrefix "127.0.0.1:" cfg.proxy)) {
enable = true;
};
config.services.nginx = mkIf config.services.oauth2_proxy.enable (mkMerge
((optional (cfg.virtualHosts != []) {
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recommendedProxySettings = true; # needed because duplicate headers
}) ++ (map (vhost: {
virtualHosts.${vhost} = {
locations."/oauth2/" = {
proxyPass = cfg.proxy;
extraConfig = ''
proxy_set_header X-Scheme $scheme;
proxy_set_header X-Auth-Request-Redirect $scheme://$host$request_uri;
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'';
};
locations."/oauth2/auth" = {
proxyPass = cfg.proxy;
extraConfig = ''
proxy_set_header X-Scheme $scheme;
# nginx auth_request includes headers but not body
proxy_set_header Content-Length "";
proxy_pass_request_body off;
'';
};
locations."/".extraConfig = ''
auth_request /oauth2/auth;
error_page 401 = /oauth2/sign_in;
# pass information via X-User and X-Email headers to backend,
# requires running with --set-xauthrequest flag
auth_request_set $user $upstream_http_x_auth_request_user;
auth_request_set $email $upstream_http_x_auth_request_email;
proxy_set_header X-User $user;
proxy_set_header X-Email $email;
# if you enabled --cookie-refresh, this is needed for it to work with auth_request
auth_request_set $auth_cookie $upstream_http_set_cookie;
add_header Set-Cookie $auth_cookie;
'';
};
}) cfg.virtualHosts)));
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}