servers/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 ];
  15 config = {
  16 users.ldap = {
  17   enable = true;
  18   server = "ldapi:///";
  19   base = "ou=posix,${domainSuffix}";
  20   bind = {
  21     #distinguishedName = "cn=admin,${domainSuffix}";
  22   };
  23   daemon = {
  24     enable = true;
  25     extraConfig = ''
  26       log syslog debug
  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   cnConfig = ''
  44     dn: cn=config
  45     objectClass: olcGlobal
  46     olcLogLevel: none
  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     dn: cn={0}module,cn=config
  52     objectClass: olcModuleList
  53     olcModulePath: ${pkgs.openldap}/lib/modules
  54     olcModuleLoad: pw-sha2
  55     olcModuleLoad: pw-pbkdf2
  56     olcModuleLoad: back_mdb
  57
  58     # The first database is the special frontend database
  59     # whose settings are applied globally to all the other databases.
  60     # Beware that cn={0}module,cn=config must appear before
  61     # for enabling password schemes provided by the modules in olcPasswordHash.
  62     # ldapsearch -LLL -H ldapi:// -D cn=admin,cn=config -Y EXTERNAL -b 'olcDatabase={-1}frontend,cn=config' -s sub '*'
  63     dn: olcDatabase={-1}frontend,cn=config
  64     objectClass: olcDatabaseConfig
  65     objectClass: olcFrontendConfig
  66     # The maximum number of entries that is returned for a search operation
  67     olcSizeLimit: 500
  68     # Allow unlimited access to local connection from the local root user
  69     olcAccess: to *
  70       by dn.exact=gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth manage
  71       by * break
  72     # Allow unauthenticated read access for schema and base DN autodiscovery
  73     olcAccess: to dn.exact=""
  74       by * read
  75     olcAccess: to dn.base="cn=Subschema"
  76       by * read
  77     # Hash algorithm to be used by LDAP Password Modify Extended Operation or the ppolicy overlay
  78     olcPasswordHash: {PBKDF2-SHA256}
  79
  80     dn: olcDatabase={0}config,cn=config
  81     objectClass: olcDatabaseConfig
  82     olcRootDN: cn=admin,cn=config
  83     # Access to cn=config, system root can be manager
  84     # with SASL mechanism (-Y EXTERNAL) over unix socket (-H ldapi://)
  85     olcAccess: to *
  86       by dn.exact="gidNumber=0+uidNumber=0,cn=peercred,cn=external,cn=auth" manage
  87       by * break
  88
  89     dn: cn=schema,cn=config
  90     objectClass: olcSchemaConfig
  91
  92     include: file://${pkgs.openldap}/etc/schema/core.ldif
  93     include: file://${pkgs.openldap}/etc/schema/cosine.ldif
  94     include: file://${pkgs.openldap}/etc/schema/nis.ldif
  95     include: file://${pkgs.openldap}/etc/schema/inetorgperson.ldif
  96     include: file://${openldap/schema/postfix-book.ldif}
  97   '';
  98 };
  99 };
 100 }