machines/mermet/openldap.nix

   1 { pkgs, lib, config, ... }:
   2 let
   3   inherit (builtins) baseNameOf readFile;
   4   inherit (lib) types;
   5   inherit (pkgs.lib) unlinesAttrs;
   6   inherit (config) networking;
   7   inherit (config.services) openldap;
   8   inherit (config.users) ldap;
   9   domainSuffix = "dc=" + lib.concatStringsSep ",dc=" (lib.splitString "." networking.domain);
  10 in
  11 {
  12 imports = [
  13   openldap/sourcephile.fr.nix
  14   openldap/autogeree.net.nix
  15 ];
  16 users.ldap = {
  17   enable = false;
  18   server = "ldapi:///";
  19   base = "ou=posix,${domainSuffix}";
  20   bind = {
  21     #distinguishedName = "cn=admin,${domainSuffix}";
  22   };
  23   daemon = {
  24     enable = false;
  25     extraConfig = ''
  26       log syslog info
  27
  28       sasl_mech EXTERNAL
  29       # NOTE: nslcd cannot use SASL to bind to rootpwmoddn
  30       # which is the DN used by nslcd when passwd is run by root
  31       # to change the userPassword of an LDAP user.
  32       # SEE: https://www.reddit.com/r/linuxadmin/comments/53sxpl/how_do_i_configure_nslcd_to_use_a_sasl_external/d7w9awd/
  33       # Thus, use: ldappasswd -H ldapi:// -Y EXTERNAL uid=$user,ou=accounts,ou=posix,dc=sourcephile,dc=fr
  34     '';
  35   };
  36 };
  37 services.openldap = {
  38   enable    = true;
  39   #dataDir   = "/var/db/ldap";
  40   #configDir = "/var/db/slapd";
  41   urlList   = [ "ldapi:///" ]; # UNIX socket
  42   # sudo ldapsearch -LLL -H ldapi:// -D cn=admin,cn=config -Y EXTERNAL -b "" -s base supportedControl
  43   settings = {
  44     attrs = {
  45       objectClass = "olcGlobal";
  46       olcLogLevel = [ "stats" ];
  47       # The tool-threads parameter sets the actual amount of CPU's
  48       # that is used for indexing.
  49       olcToolThreads = toString config.nix.maxJobs;
  50     };
  51     children = {
  52       "cn=schema".includes = [
  53          "${pkgs.openldap}/etc/schema/core.ldif"
  54          "${pkgs.openldap}/etc/schema/cosine.ldif"
  55          "${pkgs.openldap}/etc/schema/nis.ldif"
  56          "${pkgs.openldap}/etc/schema/inetorgperson.ldif"
  57          "${openldap/schema/postfix-book.ldif}"
  58       ];
  59       # The first database is the special frontend database
  60       # whose settings are applied globally to all the other databases.
  61       # Beware that cn={0}module,cn=config must appear before
  62       # for enabling password schemes provided by the modules in olcPasswordHash.
  63       # ldapsearch -LLL -H ldapi:// -D cn=admin,cn=config -Y EXTERNAL -b 'olcDatabase={-1}frontend,cn=config' -s sub '*'
  64       "olcDatabase={-1}frontend".attrs = {
  65         objectClass = [ "olcDatabaseConfig" "olcFrontendConfig" ];
  66         olcDatabase = "{-1}frontend";
  67         # The maximum number of entries that is returned for a search operation
  68         olcSizeLimit = "500";
  69         olcAccess = [
  70           # Allow unlimited access to local connection from the local root user
  71           ''to *
  72           by dn.exact=gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth manage
  73           by * break
  74           ''
  75           # Allow unauthenticated read access for schema and base DN autodiscovery
  76           ''to dn.exact=""
  77           by * read
  78           ''
  79           ''to dn.base="cn=Subschema"
  80           by * read
  81           ''
  82         ];
  83         # Hash algorithm to be used by LDAP Password Modify Extended Operation or the ppolicy overlay
  84         #olcPasswordHash = "{PBKDF2-SHA256}";
  85         olcPasswordHash = "{SSHA}";
  86       };
  87       "cn={0}module".attrs = {
  88         objectClass = [ "olcModuleList" ];
  89         olcModulePath = "${pkgs.openldap}/lib/modules";
  90         #olcModuleLoad = "pw-sha2";
  91         #olcModuleLoad = "pw-pbkdf2";
  92         olcModuleLoad = "back_mdb";
  93       };
  94
  95       "olcDatabase={0}config".attrs = {
  96         objectClass = "olcDatabaseConfig";
  97         olcDatabase = "{0}config";
  98         olcRootDN = "cn=admin,cn=config";
  99         # Access to cn=config, system root can be manager
 100         # with SASL mechanism (-Y EXTERNAL) over unix socket (-H ldapi://)
 101         olcAccess = [
 102           ''to *
 103           by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" manage
 104           by * break
 105           ''
 106         ];
 107       };
 108     };
 109   };
 110   /*
 111   cnConfig = ''
 112     dn: cn=schema,cn=config
 113     objectClass: olcSchemaConfig
 114
 115     dn: olcBackend=mdb,cn=config
 116     objectClass: olcBackendConfig
 117   '';
 118   */
 119 };
 120 }