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{ lib, pkgs, config, name, ... }:
{
options.myServices.certificates = {
enable = lib.mkEnableOption "enable certificates";
webroot = lib.mkOption {
readOnly = true;
default = "/var/lib/acme/acme-challenges";
};
certConfig = lib.mkOption {
default = {
webroot = lib.mkForce null; # avoids creation of tmpfiles
email = "ismael@bouya.org";
postRun = builtins.concatStringsSep "\n" [
(lib.optionalString config.services.httpd.Prod.enable "systemctl reload httpdProd.service")
(lib.optionalString config.services.httpd.Tools.enable "systemctl reload httpdTools.service")
(lib.optionalString config.services.httpd.Inte.enable "systemctl reload httpdInte.service")
(lib.optionalString config.services.nginx.enable "systemctl reload nginx.service")
];
extraLegoRenewFlags = [ "--reuse-key" ];
keyType = lib.mkDefault "ec256"; # https://github.com/NixOS/nixpkgs/pull/83121
};
description = "Default configuration for certificates";
};
};
config = lib.mkIf config.myServices.certificates.enable {
services.duplyBackup.profiles.system.excludeFile = ''
+ ${config.myServices.certificates.webroot}
'';
services.nginx = {
recommendedTlsSettings = true;
virtualHosts = {
"${config.hostEnv.fqdn}" = {
acmeRoot = config.myServices.certificates.webroot;
useACMEHost = name;
forceSSL = true;
};
};
};
services.websites.certs = config.myServices.certificates.certConfig;
myServices.databasesCerts = config.myServices.certificates.certConfig;
myServices.ircCerts = config.myServices.certificates.certConfig;
security.acme.acceptTerms = true;
security.acme.preliminarySelfsigned = true;
security.acme.certs = {
"${name}" = config.myServices.certificates.certConfig // {
domain = config.hostEnv.fqdn;
};
};
users.users.acme = {
uid = config.ids.uids.acme;
group = "acme";
description = "Acme user";
};
users.groups.acme = {
gid = config.ids.gids.acme;
};
systemd.services = lib.attrsets.mapAttrs' (k: v:
lib.attrsets.nameValuePair "acme-selfsigned-${k}" {
wantedBy = [ "acme-selfsigned-certificates.target" ];
script = lib.mkAfter ''
cp $workdir/server.crt ${config.security.acme.certs."${k}".directory}/cert.pem
chown '${v.user}:${v.group}' ${config.security.acme.certs."${k}".directory}/cert.pem
chmod ${if v.allowKeysForGroup then "750" else "700"} ${config.security.acme.certs."${k}".directory}/cert.pem
cp $workdir/ca.crt ${config.security.acme.certs."${k}".directory}/chain.pem
chown '${v.user}:${v.group}' ${config.security.acme.certs."${k}".directory}/chain.pem
chmod ${if v.allowKeysForGroup then "750" else "700"} ${config.security.acme.certs."${k}".directory}/chain.pem
'';
}
) config.security.acme.certs //
lib.attrsets.mapAttrs' (k: data:
lib.attrsets.nameValuePair "acme-${k}" {
after = lib.mkAfter [ "bind.service" ];
serviceConfig =
let
cfg = config.security.acme;
hashOptions = let
domains = builtins.concatStringsSep "," (
[ data.domain ] ++ (builtins.attrNames data.extraDomains)
);
certOptions = builtins.concatStringsSep "," [
(if data.ocspMustStaple then "must-staple" else "no-must-staple")
];
in
builtins.hashString "sha256" (builtins.concatStringsSep ";" [ data.keyType domains certOptions ]);
accountsDir = "accounts-${data.keyType}";
lpath = "acme/${k}";
apath = "/var/lib/${lpath}";
spath = "/var/lib/acme/.lego/${k}";
fileMode = if data.allowKeysForGroup then "640" else "600";
dirFileMode = if data.allowKeysForGroup then "750" else "700";
globalOpts = [ "-d" data.domain "--email" data.email "--path" "." "--key-type" data.keyType ]
++ lib.optionals (cfg.acceptTerms) [ "--accept-tos" ]
++ lib.optionals (data.dnsProvider != null && !data.dnsPropagationCheck) [ "--dns.disable-cp" ]
++ lib.concatLists (lib.mapAttrsToList (name: root: [ "-d" name ]) data.extraDomains)
++ (if data.dnsProvider != null then [ "--dns" data.dnsProvider ] else [ "--http" "--http.webroot" config.myServices.certificates.webroot ])
++ lib.optionals (cfg.server != null || data.server != null) ["--server" (if data.server == null then cfg.server else data.server)];
certOpts = lib.optionals data.ocspMustStaple [ "--must-staple" ];
runOpts = lib.escapeShellArgs (globalOpts ++ [ "run" ] ++ certOpts);
renewOpts = lib.escapeShellArgs (globalOpts ++
[ "renew" "--days" (builtins.toString cfg.validMinDays) ] ++
certOpts ++ data.extraLegoRenewFlags);
forceRenewOpts = lib.escapeShellArgs (globalOpts ++
[ "renew" "--days" "999" ] ++
certOpts ++ data.extraLegoRenewFlags);
keyName = builtins.replaceStrings ["*"] ["_"] data.domain;
in {
User = lib.mkForce "acme";
Group = lib.mkForce "acme";
WorkingDirectory = lib.mkForce spath;
StateDirectory = lib.mkForce "acme/.lego/${k} acme/.lego/${accountsDir}";
ExecStartPre =
let
script = pkgs.writeScript "acme-prestart" ''
#!${pkgs.runtimeShell} -e
install -m 0755 -o acme -g acme -d ${config.myServices.certificates.webroot}
'';
in
lib.mkForce "+${script}";
ExecStart = lib.mkForce (pkgs.writeScript "acme-start" ''
#!${pkgs.runtimeShell} -e
# lego doesn't check key type after initial creation, we
# need to check for him
if [ -L ${spath}/accounts -o -d ${spath}/accounts ]; then
if [ -L ${spath}/accounts -a "$(readlink ${spath}/accounts)" != ../${accountsDir} ]; then
ln -sfn ../${accountsDir} ${spath}/accounts
mv -f ${spath}/certificates/${keyName}.key ${spath}/certificates/${keyName}.key.old
fi
else
ln -s ../${accountsDir} ${spath}/accounts
fi
# check if domain changed: lego doesn't check by itself
if [ ! -e ${spath}/certificates/${keyName}.crt -o ! -e ${spath}/certificates/${keyName}.key -o ! -e "${spath}/accounts/acme-v02.api.letsencrypt.org/${data.email}/account.json" ]; then
${pkgs.lego}/bin/lego ${runOpts}
elif [ ! -f ${spath}/currentDomains -o "$(cat ${spath}/currentDomains)" != "${hashOptions}" ]; then
${pkgs.lego}/bin/lego ${forceRenewOpts}
else
${pkgs.lego}/bin/lego ${renewOpts}
fi
'');
ExecStartPost =
let
script = pkgs.writeScript "acme-post-start" ''
#!${pkgs.runtimeShell} -e
install -m 0755 -o root -g root -d /var/lib/acme
install -m 0${dirFileMode} -o ${data.user} -g ${data.group} -d /var/lib/acme/${k}
cd /var/lib/acme/${k}
# Test that existing cert is older than new cert
KEY=${spath}/certificates/${keyName}.key
KEY_CHANGED=no
if [ -e $KEY -a $KEY -nt key.pem ]; then
KEY_CHANGED=yes
cp -p ${spath}/certificates/${keyName}.key key.pem
cp -p ${spath}/certificates/${keyName}.crt fullchain.pem
cp -p ${spath}/certificates/${keyName}.issuer.crt chain.pem
ln -sf fullchain.pem cert.pem
cat key.pem fullchain.pem > full.pem
echo -n "${hashOptions}" > ${spath}/currentDomains
fi
chmod ${fileMode} *.pem
chown '${data.user}:${data.group}' *.pem
if [ "$KEY_CHANGED" = "yes" ]; then
: # noop in case postRun is empty
${data.postRun}
fi
'';
in
lib.mkForce "+${script}";
};
}
) config.security.acme.certs //
{
httpdProd = lib.mkIf config.services.httpd.Prod.enable
{ after = [ "acme-selfsigned-certificates.target" ]; wants = [ "acme-selfsigned-certificates.target" ]; };
httpdTools = lib.mkIf config.services.httpd.Tools.enable
{ after = [ "acme-selfsigned-certificates.target" ]; wants = [ "acme-selfsigned-certificates.target" ]; };
httpdInte = lib.mkIf config.services.httpd.Inte.enable
{ after = [ "acme-selfsigned-certificates.target" ]; wants = [ "acme-selfsigned-certificates.target" ]; };
};
};
}
|
