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4f0dadbf38
After final improvements to the official formatter implementation,
this commit now performs the first treewide reformat of Nix files using it.
This is part of the implementation of RFC 166.
Only "inactive" files are reformatted, meaning only files that
aren't being touched by any PR with activity in the past 2 months.
This is to avoid conflicts for PRs that might soon be merged.
Later we can do a full treewide reformat to get the rest,
which should not cause as many conflicts.
A CI check has already been running for some time to ensure that new and
already-formatted files are formatted, so the files being reformatted here
should also stay formatted.
This commit was automatically created and can be verified using
nix-build a08b3a4d19.tar.gz \
--argstr baseRev b32a094368
result/bin/apply-formatting $NIXPKGS_PATH
331 lines
10 KiB
Nix
331 lines
10 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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let
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inherit (lib)
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mkEnableOption
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mkIf
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mkMerge
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mkOption
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mkRenamedOptionModule
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types
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;
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cfg = config.users.ldap;
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# Careful: OpenLDAP seems to be very picky about the indentation of
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# this file. Directives HAVE to start in the first column!
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ldapConfig = {
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target = "ldap.conf";
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source = pkgs.writeText "ldap.conf" ''
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uri ${config.users.ldap.server}
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base ${config.users.ldap.base}
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timelimit ${toString config.users.ldap.timeLimit}
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bind_timelimit ${toString config.users.ldap.bind.timeLimit}
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bind_policy ${config.users.ldap.bind.policy}
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${lib.optionalString config.users.ldap.useTLS ''
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ssl start_tls
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''}
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${lib.optionalString (config.users.ldap.bind.distinguishedName != "") ''
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binddn ${config.users.ldap.bind.distinguishedName}
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''}
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${lib.optionalString (cfg.extraConfig != "") cfg.extraConfig}
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'';
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};
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nslcdConfig = pkgs.writeText "nslcd.conf" ''
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uri ${cfg.server}
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base ${cfg.base}
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timelimit ${toString cfg.timeLimit}
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bind_timelimit ${toString cfg.bind.timeLimit}
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${lib.optionalString (cfg.bind.distinguishedName != "") "binddn ${cfg.bind.distinguishedName}"}
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${lib.optionalString (cfg.daemon.rootpwmoddn != "") "rootpwmoddn ${cfg.daemon.rootpwmoddn}"}
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${lib.optionalString (cfg.daemon.extraConfig != "") cfg.daemon.extraConfig}
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'';
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# nslcd normally reads configuration from /etc/nslcd.conf.
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# this file might contain secrets. We append those at runtime,
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# so redirect its location to something more temporary.
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nslcdWrapped = pkgs.runCommand "nslcd-wrapped" { nativeBuildInputs = [ pkgs.makeWrapper ]; } ''
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mkdir -p $out/bin
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makeWrapper ${pkgs.nss_pam_ldapd}/sbin/nslcd $out/bin/nslcd \
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--set LD_PRELOAD "${pkgs.libredirect}/lib/libredirect.so" \
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--set NIX_REDIRECTS "/etc/nslcd.conf=/run/nslcd/nslcd.conf"
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'';
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in
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{
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###### interface
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options = {
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users.ldap = {
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enable = mkEnableOption "authentication against an LDAP server";
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loginPam = mkOption {
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type = types.bool;
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default = true;
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description = "Whether to include authentication against LDAP in login PAM.";
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};
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nsswitch = mkOption {
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type = types.bool;
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default = true;
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description = "Whether to include lookup against LDAP in NSS.";
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};
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server = mkOption {
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type = types.str;
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example = "ldap://ldap.example.org/";
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description = "The URL of the LDAP server.";
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};
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base = mkOption {
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type = types.str;
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example = "dc=example,dc=org";
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description = "The distinguished name of the search base.";
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};
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useTLS = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If enabled, use TLS (encryption) over an LDAP (port 389)
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connection. The alternative is to specify an LDAPS server (port
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636) in {option}`users.ldap.server` or to forego
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security.
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'';
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};
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timeLimit = mkOption {
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default = 0;
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type = types.int;
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description = ''
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Specifies the time limit (in seconds) to use when performing
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searches. A value of zero (0), which is the default, is to
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wait indefinitely for searches to be completed.
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'';
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};
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daemon = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to let the nslcd daemon (nss-pam-ldapd) handle the
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LDAP lookups for NSS and PAM. This can improve performance,
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and if you need to bind to the LDAP server with a password,
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it increases security, since only the nslcd user needs to
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have access to the bindpw file, not everyone that uses NSS
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and/or PAM. If this option is enabled, a local nscd user is
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created automatically, and the nslcd service is started
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automatically when the network get up.
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'';
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};
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extraConfig = mkOption {
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default = "";
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type = types.lines;
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description = ''
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Extra configuration options that will be added verbatim at
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the end of the nslcd configuration file (`nslcd.conf(5)`).
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'';
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};
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rootpwmoddn = mkOption {
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default = "";
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example = "cn=admin,dc=example,dc=com";
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type = types.str;
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description = ''
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The distinguished name to use to bind to the LDAP server
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when the root user tries to modify a user's password.
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'';
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};
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rootpwmodpwFile = mkOption {
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default = "";
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example = "/run/keys/nslcd.rootpwmodpw";
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type = types.str;
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description = ''
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The path to a file containing the credentials with which to bind to
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the LDAP server if the root user tries to change a user's password.
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'';
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};
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};
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bind = {
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distinguishedName = mkOption {
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default = "";
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example = "cn=admin,dc=example,dc=com";
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type = types.str;
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description = ''
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The distinguished name to bind to the LDAP server with. If this
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is not specified, an anonymous bind will be done.
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'';
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};
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passwordFile = mkOption {
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default = "/etc/ldap/bind.password";
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type = types.str;
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description = ''
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The path to a file containing the credentials to use when binding
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to the LDAP server (if not binding anonymously).
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'';
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};
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timeLimit = mkOption {
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default = 30;
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type = types.int;
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description = ''
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Specifies the time limit (in seconds) to use when connecting
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to the directory server. This is distinct from the time limit
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specified in {option}`users.ldap.timeLimit` and affects
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the initial server connection only.
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'';
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};
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policy = mkOption {
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default = "hard_open";
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type = types.enum [
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"hard_open"
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"hard_init"
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"soft"
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];
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description = ''
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Specifies the policy to use for reconnecting to an unavailable
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LDAP server. The default is `hard_open`, which
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reconnects if opening the connection to the directory server
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failed. By contrast, `hard_init` reconnects if
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initializing the connection failed. Initializing may not
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actually contact the directory server, and it is possible that
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a malformed configuration file will trigger reconnection. If
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`soft` is specified, then
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`nss_ldap` will return immediately on server
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failure. All hard reconnect policies block with exponential
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backoff before retrying.
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'';
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};
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};
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extraConfig = mkOption {
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default = "";
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type = types.lines;
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description = ''
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Extra configuration options that will be added verbatim at
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the end of the ldap configuration file (`ldap.conf(5)`).
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If {option}`users.ldap.daemon` is enabled, this
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configuration will not be used. In that case, use
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{option}`users.ldap.daemon.extraConfig` instead.
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'';
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};
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};
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};
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###### implementation
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config = mkIf cfg.enable {
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environment.etc = lib.optionalAttrs (!cfg.daemon.enable) {
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"ldap.conf" = ldapConfig;
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};
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system.nssModules = mkIf cfg.nsswitch (
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lib.singleton (if cfg.daemon.enable then pkgs.nss_pam_ldapd else pkgs.nss_ldap)
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);
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system.nssDatabases.group = lib.optional cfg.nsswitch "ldap";
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system.nssDatabases.passwd = lib.optional cfg.nsswitch "ldap";
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system.nssDatabases.shadow = lib.optional cfg.nsswitch "ldap";
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users = mkIf cfg.daemon.enable {
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groups.nslcd = {
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gid = config.ids.gids.nslcd;
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};
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users.nslcd = {
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uid = config.ids.uids.nslcd;
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description = "nslcd user.";
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group = "nslcd";
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};
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};
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systemd.services = mkMerge [
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(mkIf (!cfg.daemon.enable) {
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ldap-password = {
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wantedBy = [ "sysinit.target" ];
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before = [
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"sysinit.target"
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"shutdown.target"
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];
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conflicts = [ "shutdown.target" ];
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unitConfig.DefaultDependencies = false;
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serviceConfig.Type = "oneshot";
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serviceConfig.RemainAfterExit = true;
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script = ''
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if test -f "${cfg.bind.passwordFile}" ; then
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umask 0077
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conf="$(mktemp)"
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printf 'bindpw %s\n' "$(cat ${cfg.bind.passwordFile})" |
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cat ${ldapConfig.source} - >"$conf"
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mv -fT "$conf" /etc/ldap.conf
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fi
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'';
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};
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})
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(mkIf cfg.daemon.enable {
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nslcd = {
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wantedBy = [ "multi-user.target" ];
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preStart = ''
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umask 0077
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conf="$(mktemp)"
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{
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cat ${nslcdConfig}
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test -z '${cfg.bind.distinguishedName}' -o ! -f '${cfg.bind.passwordFile}' ||
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printf 'bindpw %s\n' "$(cat '${cfg.bind.passwordFile}')"
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test -z '${cfg.daemon.rootpwmoddn}' -o ! -f '${cfg.daemon.rootpwmodpwFile}' ||
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printf 'rootpwmodpw %s\n' "$(cat '${cfg.daemon.rootpwmodpwFile}')"
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} >"$conf"
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mv -fT "$conf" /run/nslcd/nslcd.conf
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'';
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restartTriggers = [
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nslcdConfig
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cfg.bind.passwordFile
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cfg.daemon.rootpwmodpwFile
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];
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serviceConfig = {
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ExecStart = "${nslcdWrapped}/bin/nslcd";
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Type = "forking";
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Restart = "always";
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User = "nslcd";
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Group = "nslcd";
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RuntimeDirectory = [ "nslcd" ];
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PIDFile = "/run/nslcd/nslcd.pid";
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AmbientCapabilities = "CAP_SYS_RESOURCE";
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};
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};
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})
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];
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};
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imports = [
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(mkRenamedOptionModule
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[ "users" "ldap" "bind" "password" ]
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[ "users" "ldap" "bind" "passwordFile" ]
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)
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];
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}
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