451 lines
15 KiB
Nix
451 lines
15 KiB
Nix
{ config, lib, options, pkgs, ... }:
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let
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sp = config.selfprivacy;
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stateDir =
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if sp.useBinds
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then "/volumes/${cfg.location}/gitea"
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else "/var/lib/gitea";
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cfg = sp.modules.gitea;
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themes = [
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"forgejo-auto"
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"forgejo-light"
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"forgejo-dark"
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"gitea-auto"
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"gitea-light"
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"gitea-dark"
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];
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is-auth-enabled = sp.modules.auth.enable or false;
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oauth-client-id = "forgejo";
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auth-passthru = config.passthru.selfprivacy.auth;
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oauth2-provider-name = auth-passthru.oauth2-provider-name;
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redirect-uri =
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"https://${cfg.subdomain}.${sp.domain}/user/oauth2/${oauth2-provider-name}/callback";
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admins-group = "sp.forgejo.admins";
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users-group = "sp.forgejo.users";
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kanidm-service-account-name = "sp.${oauth-client-id}.service-account";
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kanidm-service-account-token-name = "${oauth-client-id}-service-account-token";
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kanidm-service-account-token-fp =
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"/run/keys/${oauth-client-id}/kanidm-service-account-token"; # FIXME sync with auth module
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# TODO rewrite to tmpfiles.d
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kanidmExecStartPreScriptRoot = pkgs.writeShellScript
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"${oauth-client-id}-kanidm-ExecStartPre-root-script.sh"
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''
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# set-group-ID bit allows kanidm user to create files with another group
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mkdir -p -v --mode=u+rwx,g+rs,g-w,o-rwx /run/keys/${oauth-client-id}
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chown kanidm:${config.services.forgejo.group} /run/keys/${oauth-client-id}
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'';
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kanidm-oauth-client-secret-fp =
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"/run/keys/${oauth-client-id}/kanidm-oauth-client-secret";
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kanidmExecStartPreScript = pkgs.writeShellScript
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"${oauth-client-id}-kanidm-ExecStartPre-script.sh" ''
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[ -f "${kanidm-oauth-client-secret-fp}" ] || \
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"${lib.getExe pkgs.openssl}" rand -base64 -out "${kanidm-oauth-client-secret-fp}" 32
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'';
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kanidmExecStartPostScript = pkgs.writeShellScript
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"${oauth-client-id}-kanidm-ExecStartPost-script.sh"
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''
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export HOME=$RUNTIME_DIRECTORY/client_home
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readonly KANIDM="${pkgs.kanidm}/bin/kanidm"
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# get Kanidm service account for mailserver
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KANIDM_SERVICE_ACCOUNT="$($KANIDM service-account list --name idm_admin | grep -E "^name: ${kanidm-service-account-name}$")"
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echo KANIDM_SERVICE_ACCOUNT: "$KANIDM_SERVICE_ACCOUNT"
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if [ -n "$KANIDM_SERVICE_ACCOUNT" ]
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then
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echo "kanidm service account \"${kanidm-service-account-name}\" is found"
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else
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echo "kanidm service account \"${kanidm-service-account-name}\" is not found"
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echo "creating new kanidm service account \"${kanidm-service-account-name}\""
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if $KANIDM service-account create --name idm_admin "${kanidm-service-account-name}" "${kanidm-service-account-name}" idm_admin
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then
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echo "kanidm service account \"${kanidm-service-account-name}\" created"
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else
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echo "error: cannot create kanidm service account \"${kanidm-service-account-name}\""
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exit 1
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fi
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fi
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# add Kanidm service account to `idm_mail_servers` group
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$KANIDM group add-members idm_mail_servers "${kanidm-service-account-name}"
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# create a new read-only token for kanidm
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if ! KANIDM_SERVICE_ACCOUNT_TOKEN_JSON="$($KANIDM service-account api-token generate --name idm_admin "${kanidm-service-account-name}" "${kanidm-service-account-token-name}" --output json)"
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then
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echo "error: kanidm CLI returns an error when trying to generate service-account api-token"
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exit 1
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fi
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if ! KANIDM_SERVICE_ACCOUNT_TOKEN="$(echo "$KANIDM_SERVICE_ACCOUNT_TOKEN_JSON" | ${lib.getExe pkgs.jq} -r .result)"
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then
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echo "error: cannot get service-account API token from JSON"
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exit 1
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fi
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if ! install --mode=640 \
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<(printf "%s" "$KANIDM_SERVICE_ACCOUNT_TOKEN") \
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${kanidm-service-account-token-fp}
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then
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echo "error: cannot write token to \"${kanidm-service-account-token-fp}\""
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exit 1
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fi
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'';
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in
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{
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options.selfprivacy.modules.gitea = {
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enable = (lib.mkOption {
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default = false;
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type = lib.types.bool;
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description = "Enable Forgejo";
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}) // {
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meta = {
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type = "enable";
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};
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};
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location = (lib.mkOption {
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type = lib.types.str;
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description = "Forgejo location";
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}) // {
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meta = {
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type = "location";
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};
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};
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subdomain = (lib.mkOption {
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default = "git";
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type = lib.types.strMatching "[A-Za-z0-9][A-Za-z0-9\-]{0,61}[A-Za-z0-9]";
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description = "Subdomain";
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}) // {
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meta = {
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widget = "subdomain";
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type = "string";
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regex = "[A-Za-z0-9][A-Za-z0-9\-]{0,61}[A-Za-z0-9]";
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weight = 0;
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};
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};
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appName = (lib.mkOption {
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default = "SelfPrivacy git Service";
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type = lib.types.str;
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description = "The name displayed in the web interface";
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}) // {
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meta = {
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type = "string";
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weight = 1;
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};
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};
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enableLfs = (lib.mkOption {
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default = true;
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type = lib.types.bool;
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description = "Enable Git LFS";
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}) // {
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meta = {
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type = "bool";
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weight = 2;
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};
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};
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forcePrivate = (lib.mkOption {
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default = false;
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type = lib.types.bool;
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description = "Force all new repositories to be private";
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}) // {
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meta = {
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type = "bool";
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weight = 3;
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};
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};
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disableRegistration = (lib.mkOption {
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default = false;
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type = lib.types.bool;
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description = "Disable registration of new users";
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}) // {
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meta = {
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type = "bool";
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weight = 4;
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};
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};
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requireSigninView = (lib.mkOption {
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default = false;
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type = lib.types.bool;
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description = "Force users to log in to view any page";
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}) // {
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meta = {
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type = "bool";
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weight = 5;
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};
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};
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defaultTheme = (lib.mkOption {
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default = "forgejo-auto";
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type = lib.types.enum themes;
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description = "Default theme";
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}) // {
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meta = {
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type = "enum";
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options = themes;
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weight = 6;
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};
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};
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debug = lib.mkOption {
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default = false;
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type = lib.types.bool;
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};
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};
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config = lib.mkIf cfg.enable (lib.mkMerge [
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{
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fileSystems = lib.mkIf sp.useBinds {
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"/var/lib/gitea" = {
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device = "/volumes/${cfg.location}/gitea";
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options = [ "bind" ];
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};
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};
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services.gitea.enable = false;
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services.forgejo = {
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enable = true;
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package = pkgs.forgejo;
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inherit stateDir;
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user = "gitea";
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group = "gitea";
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database = {
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type = "sqlite3";
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host = "127.0.0.1";
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name = "gitea";
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user = "gitea";
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path = "${stateDir}/data/gitea.db";
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createDatabase = true;
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};
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# ssh = {
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# enable = true;
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# clonePort = 22;
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# };
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lfs = {
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enable = cfg.enableLfs;
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contentDir = "${stateDir}/lfs";
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};
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repositoryRoot = "${stateDir}/repositories";
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# cookieSecure = true;
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settings = {
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DEFAULT = {
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APP_NAME = "${cfg.appName}";
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};
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server = {
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DOMAIN = "${cfg.subdomain}.${sp.domain}";
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ROOT_URL = "https://${cfg.subdomain}.${sp.domain}/";
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HTTP_ADDR = "0.0.0.0";
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HTTP_PORT = 3000;
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};
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mailer = {
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ENABLED = false;
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};
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ui = {
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DEFAULT_THEME = cfg.defaultTheme;
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SHOW_USER_EMAIL = false;
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};
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picture = {
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DISABLE_GRAVATAR = true;
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};
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admin = {
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ENABLE_KANBAN_BOARD = true;
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};
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repository = {
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FORCE_PRIVATE = cfg.forcePrivate;
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};
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session = {
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COOKIE_SECURE = true;
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};
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log = {
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ROOT_PATH = "${stateDir}/log";
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LEVEL = if cfg.debug then "Warn" else "Trace";
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};
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service = {
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DISABLE_REGISTRATION = cfg.disableRegistration;
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REQUIRE_SIGNIN_VIEW = cfg.requireSigninView;
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};
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};
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};
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users.users.gitea = {
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home = "${stateDir}";
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useDefaultShell = true;
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group = "gitea";
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isSystemUser = true;
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};
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users.groups.gitea = { };
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services.nginx.virtualHosts."${cfg.subdomain}.${sp.domain}" = {
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useACMEHost = sp.domain;
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forceSSL = true;
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extraConfig = ''
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add_header Strict-Transport-Security $hsts_header;
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#add_header Content-Security-Policy "script-src 'self'; object-src 'none'; base-uri 'none';" always;
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add_header 'Referrer-Policy' 'origin-when-cross-origin';
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add_header X-Frame-Options DENY;
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add_header X-Content-Type-Options nosniff;
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add_header X-XSS-Protection "1; mode=block";
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proxy_cookie_path / "/; secure; HttpOnly; SameSite=strict";
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'';
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locations = {
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"/" = {
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proxyPass = "http://127.0.0.1:3000";
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};
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};
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};
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systemd = {
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services.forgejo = {
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unitConfig.RequiresMountsFor = lib.mkIf sp.useBinds "/volumes/${cfg.location}/gitea";
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serviceConfig = {
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Slice = "gitea.slice";
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};
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};
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slices.gitea = {
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description = "Forgejo service slice";
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};
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};
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}
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# the following part is active only when "auth" module is enabled
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(lib.attrsets.optionalAttrs
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(options.selfprivacy.modules ? "auth")
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(lib.mkIf is-auth-enabled {
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services.forgejo.settings = {
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auth.DISABLE_LOGIN_FORM = true;
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service = {
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DISABLE_REGISTRATION = cfg.disableRegistration;
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REQUIRE_SIGNIN_VIEW = cfg.requireSigninView;
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ALLOW_ONLY_EXTERNAL_REGISTRATION = true;
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SHOW_REGISTRATION_BUTTON = false;
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ENABLE_BASIC_AUTHENTICATION = false;
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};
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# disallow explore page and access to private repositories, but allow public
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"service.explore".REQUIRE_SIGNIN_VIEW = true;
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# TODO control via selfprivacy parameter
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# "service.explore".DISABLE_USERS_PAGE = true;
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oauth2_client = {
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REDIRECT_URI = redirect-uri;
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ACCOUNT_LINKING = "auto";
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ENABLE_AUTO_REGISTRATION = true;
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OPENID_CONNECT_SCOPES = "email openid profile";
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};
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# doesn't work if LDAP auth source is not active!
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"cron.sync_external_users" = {
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ENABLED = true;
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RUN_AT_START = true;
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NOTICE_ON_SUCCESS = true;
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};
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};
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systemd.services.forgejo = {
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preStart =
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let
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exe = lib.getExe config.services.forgejo.package;
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# FIXME skip-tls-verify, bind-password
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ldapConfigArgs = ''
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--name LDAP \
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--active \
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--security-protocol LDAPS \
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--skip-tls-verify \
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--host '${auth-passthru.ldap-host}' \
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--port '${toString auth-passthru.ldap-port}' \
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--user-search-base '${auth-passthru.ldap-base-dn}' \
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--user-filter '(&(class=person)(memberof=${users-group})(name=%s))' \
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--admin-filter '(&(class=person)(memberof=${admins-group}))' \
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--username-attribute name \
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--firstname-attribute name \
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--surname-attribute displayname \
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--email-attribute mail \
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--public-ssh-key-attribute sshPublicKey \
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--bind-dn 'dn=token' \
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--bind-password "$(cat ${kanidm-service-account-token-fp})" \
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--synchronize-users
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'';
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oauthConfigArgs = ''
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--name "${oauth2-provider-name}" \
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--provider openidConnect \
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--key forgejo \
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--secret "$(<${kanidm-oauth-client-secret-fp})" \
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--group-claim-name groups \
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--admin-group admins \
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--auto-discover-url '${auth-passthru.oauth2-discovery-url oauth-client-id}'
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'';
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in
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lib.mkAfter ''
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set -o xtrace
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# Check if LDAP is already configured
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ldap_line="$(${exe} admin auth list | grep LDAP | head -n 1)"
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if [[ -n "$ldap_line" ]]; then
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# update ldap config
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id="$(echo "$ldap_line" | ${pkgs.gawk}/bin/awk '{print $1}')"
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${exe} admin auth update-ldap --id "$id" ${ldapConfigArgs}
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else
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# initially configure ldap
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${exe} admin auth add-ldap ${ldapConfigArgs}
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fi
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oauth_line="$(${exe} admin auth list | grep "${oauth2-provider-name}" | head -n 1)"
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if [[ -n "$oauth_line" ]]; then
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id="$(echo "$oauth_line" | ${pkgs.gawk}/bin/awk '{print $1}')"
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${exe} admin auth update-oauth --id "$id" ${oauthConfigArgs}
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else
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${exe} admin auth add-oauth ${oauthConfigArgs}
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fi
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'';
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# TODO consider passing oauth consumer service to auth module instead
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requires = [ auth-passthru.oauth2-systemd-service ];
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};
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# for ExecStartPost script to have access to /run/keys/*
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users.groups.keys.members = [ config.services.forgejo.group ];
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systemd.services.kanidm.serviceConfig.ExecStartPre = [
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("-+" + kanidmExecStartPreScriptRoot)
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("-" + kanidmExecStartPreScript)
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];
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systemd.services.kanidm.serviceConfig.ExecStartPost =
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lib.mkAfter [ ("-" + kanidmExecStartPostScript) ];
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services.nginx.virtualHosts."${cfg.subdomain}.${sp.domain}" = {
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extraConfig = lib.mkAfter ''
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rewrite ^/user/login$ /user/oauth2/${oauth2-provider-name} last;
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# FIXME is it needed?
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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'';
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};
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services.kanidm.provision = {
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groups = {
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"${admins-group}".members = [ auth-passthru.admins-group ];
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"${users-group}".members =
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[ admins-group auth-passthru.full-users-group ];
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};
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systems.oauth2.forgejo = {
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displayName = "Forgejo";
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originUrl = redirect-uri;
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originLanding = "https://${cfg.subdomain}.${sp.domain}/";
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basicSecretFile = kanidm-oauth-client-secret-fp;
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# when true, name is passed to a service instead of name@domain
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preferShortUsername = true;
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allowInsecureClientDisablePkce = true; # FIXME is it needed?
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scopeMaps = {
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"${users-group}" = [
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"email"
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"openid"
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"profile"
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];
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};
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removeOrphanedClaimMaps = true;
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# NOTE https://github.com/oddlama/kanidm-provision/issues/15
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# add more scopes when a user is a member of specific group
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# currently not possible due to https://github.com/kanidm/kanidm/issues/2882#issuecomment-2564490144
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# supplementaryScopeMaps."${admins-group}" =
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# [ "read:admin" "write:admin" ];
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claimMaps.groups = {
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joinType = "array";
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valuesByGroup.${admins-group} = [ "admins" ];
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};
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};
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};
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})
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)
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]);
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}
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