Skynet/misc_nixos-mailserver
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ldap: do not write password to the Nix store

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This commit is contained in:
Antoine Eiche 2023-05-20 00:12:02 +02:00 • committed by lewo
parent 33554e57ce
commit fb3210b932
5 changed files with 114 additions and 61 deletions
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85
mail-server/dovecot.nix
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@ -22,9 +22,10 @@ let
cfg = config.mailserver;
passwdDir = "/run/dovecot2";
passdbFile = "${passwdDir}/passdb";
passwdFile = "${passwdDir}/passwd";
userdbFile = "${passwdDir}/userdb";
# This file contains the ldap bind password
ldapConfFile = "${passwdDir}/dovecot-ldap.conf.ext";
bool2int = x: if x then "1" else "0";
maildirLayoutAppendix = lib.optionalString cfg.useFsLayout ":LAYOUT=fs";
@ -58,6 +59,41 @@ let
'';
};
ldapConfig = pkgs.writeTextFile {
name = "dovecot-ldap.conf.ext.template";
text = ''
ldap_version = 3
uris = ${lib.concatStringsSep " " cfg.ldap.uris}
${lib.optionalString cfg.ldap.startTls ''
tls = yes
''}
tls_require_cert = hard
tls_ca_cert_file = ${cfg.ldap.tlsCAFile}
dn = ${cfg.ldap.bind.dn}
sasl_bind = no
auth_bind = yes
base = ${cfg.ldap.searchBase}
scope = ${mkLdapSearchScope cfg.ldap.searchScope}
${lib.optionalString (cfg.ldap.dovecot.userAttrs != "") ''
user_attrs = ${cfg.ldap.dovecot.user_attrs}
''}
user_filter = ${cfg.ldap.dovecot.userFilter}
${lib.optionalString (cfg.ldap.dovecot.passAttrs != "") ''
pass_attrs = ${cfg.ldap.dovecot.passAttrs}
''}
pass_filter = ${cfg.ldap.dovecot.passFilter}
'';
};
setPwdInLdapConfFile = appendLdapBindPwd {
name = "ldap-conf-file";
file = ldapConfig;
prefix = "dnpass = ";
passwordFile = cfg.ldap.bind.passwordFile;
destination = ldapConfFile;
};
genPasswdScript = pkgs.writeScript "generate-password-file" ''
#!${pkgs.stdenv.shell}
@ -75,7 +111,7 @@ let
fi
done
cat <<EOF > ${passdbFile}
cat <<EOF > ${passwdFile}
${lib.concatStringsSep "\n" (lib.mapAttrsToList (name: value:
"${name}:${"$(head -n 1 ${passwordFiles."${name}"})"}::::::"
) cfg.loginAccounts)}
@ -90,7 +126,7 @@ let
) cfg.loginAccounts)}
EOF
chmod 600 ${passdbFile}
chmod 600 ${passwdFile}
chmod 600 ${userdbFile}
'';
@ -233,7 +269,7 @@ in
passdb {
driver = passwd-file
args = ${passdbFile}
args = ${passwdFile}
}
userdb {
@ -245,12 +281,12 @@ in
${lib.optionalString cfg.ldap.enable ''
passdb {
driver = ldap
args = /etc/dovecot/dovecot-ldap.conf.ext
args = ${ldapConfFile}
}
userdb {
driver = ldap
args = /etc/dovecot/dovecot-ldap.conf.ext
args = ${ldapConfFile}
default_fields = home=/var/vmail/ldap/%u uid=${toString cfg.vmailUID} gid=${toString cfg.vmailUID}
}
''}
@ -317,37 +353,6 @@ in
'';
};
environment.etc = lib.optionalAttrs (cfg.ldap.enable) {
"dovecot/dovecot-ldap.conf.ext" = {
mode = "0600";
uid = config.ids.uids.dovecot2;
gid = config.ids.gids.dovecot2;
text = ''
ldap_version = 3
uris = ${lib.concatStringsSep " " cfg.ldap.uris}
${lib.optionalString cfg.ldap.startTls ''
tls = yes
''}
tls_require_cert = hard
tls_ca_cert_file = ${cfg.ldap.tlsCAFile}
dn = ${cfg.ldap.bind.dn}
dnpass = ${cfg.ldap.bind.password}
sasl_bind = no
auth_bind = yes
base = ${cfg.ldap.searchBase}
scope = ${mkLdapSearchScope cfg.ldap.searchScope}
${lib.optionalString (cfg.ldap.dovecot.userAttrs != "") ''
user_attrs = ${cfg.ldap.dovecot.user_attrs}
''}
user_filter = ${cfg.ldap.dovecot.userFilter}
${lib.optionalString (cfg.ldap.dovecot.passAttrs != "") ''
pass_attrs = ${cfg.ldap.dovecot.passAttrs}
''}
pass_filter = ${cfg.ldap.dovecot.passFilter}
'';
};
};
systemd.services.dovecot2 = {
preStart = ''
${genPasswdScript}
@ -358,10 +363,10 @@ in
${pkgs.dovecot_pigeonhole}/bin/sievec "$k"
done
chown -R '${dovecot2Cfg.mailUser}:${dovecot2Cfg.mailGroup}' '${stateDir}/imap_sieve'
'';
'' + (lib.optionalString cfg.ldap.enable setPwdInLdapConfFile);
};
systemd.services.postfix.restartTriggers = [ genPasswdScript ];
systemd.services.postfix.restartTriggers = [ genPasswdScript ] ++ (lib.optional cfg.ldap.enable [setPwdInLdapConfFile]);
systemd.services.dovecot-fts-xapian-optimize = lib.mkIf (cfg.fullTextSearch.enable && cfg.fullTextSearch.maintenance.enable) {
description = "Optimize dovecot indices for fts_xapian";