mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-25 03:17:13 +00:00
5671fa2396
Add a new option permitting to point certbot to an ACME Directory Resource URI other than Let's Encrypt production/staging one. In the meantime, we are deprecating the now useless Let's Encrypt production flag.
332 lines
12 KiB
Nix
332 lines
12 KiB
Nix
{ config, lib, pkgs, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
|
|
cfg = config.security.acme;
|
|
|
|
certOpts = { name, ... }: {
|
|
options = {
|
|
webroot = mkOption {
|
|
type = types.str;
|
|
example = "/var/lib/acme/acme-challenges";
|
|
description = ''
|
|
Where the webroot of the HTTP vhost is located.
|
|
<filename>.well-known/acme-challenge/</filename> directory
|
|
will be created below the webroot if it doesn't exist.
|
|
<literal>http://example.org/.well-known/acme-challenge/</literal> must also
|
|
be available (notice unencrypted HTTP).
|
|
'';
|
|
};
|
|
|
|
server = mkOption {
|
|
type = types.nullOr types.str;
|
|
default = null;
|
|
description = ''
|
|
ACME Directory Resource URI. Defaults to let's encrypt
|
|
production endpoint,
|
|
https://acme-v02.api.letsencrypt.org/directory, if unset.
|
|
'';
|
|
};
|
|
|
|
domain = mkOption {
|
|
type = types.str;
|
|
default = name;
|
|
description = "Domain to fetch certificate for (defaults to the entry name)";
|
|
};
|
|
|
|
email = mkOption {
|
|
type = types.nullOr types.str;
|
|
default = null;
|
|
description = "Contact email address for the CA to be able to reach you.";
|
|
};
|
|
|
|
user = mkOption {
|
|
type = types.str;
|
|
default = "root";
|
|
description = "User running the ACME client.";
|
|
};
|
|
|
|
group = mkOption {
|
|
type = types.str;
|
|
default = "root";
|
|
description = "Group running the ACME client.";
|
|
};
|
|
|
|
allowKeysForGroup = mkOption {
|
|
type = types.bool;
|
|
default = false;
|
|
description = ''
|
|
Give read permissions to the specified group
|
|
(<option>security.acme.cert.<name>.group</option>) to read SSL private certificates.
|
|
'';
|
|
};
|
|
|
|
postRun = mkOption {
|
|
type = types.lines;
|
|
default = "";
|
|
example = "systemctl reload nginx.service";
|
|
description = ''
|
|
Commands to run after new certificates go live. Typically
|
|
the web server and other servers using certificates need to
|
|
be reloaded.
|
|
|
|
Executed in the same directory with the new certificate.
|
|
'';
|
|
};
|
|
|
|
plugins = mkOption {
|
|
type = types.listOf (types.enum [
|
|
"cert.der" "cert.pem" "chain.pem" "external.sh"
|
|
"fullchain.pem" "full.pem" "key.der" "key.pem" "account_key.json" "account_reg.json"
|
|
]);
|
|
default = [ "fullchain.pem" "full.pem" "key.pem" "account_key.json" "account_reg.json" ];
|
|
description = ''
|
|
Plugins to enable. With default settings simp_le will
|
|
store public certificate bundle in <filename>fullchain.pem</filename>,
|
|
private key in <filename>key.pem</filename> and those two previous
|
|
files combined in <filename>full.pem</filename> in its state directory.
|
|
'';
|
|
};
|
|
|
|
directory = mkOption {
|
|
type = types.str;
|
|
readOnly = true;
|
|
default = "/var/lib/acme/${name}";
|
|
description = "Directory where certificate and other state is stored.";
|
|
};
|
|
|
|
extraDomains = mkOption {
|
|
type = types.attrsOf (types.nullOr types.str);
|
|
default = {};
|
|
example = literalExample ''
|
|
{
|
|
"example.org" = "/srv/http/nginx";
|
|
"mydomain.org" = null;
|
|
}
|
|
'';
|
|
description = ''
|
|
A list of extra domain names, which are included in the one certificate to be issued, with their
|
|
own server roots if needed.
|
|
'';
|
|
};
|
|
};
|
|
};
|
|
|
|
in
|
|
|
|
{
|
|
|
|
###### interface
|
|
imports = [
|
|
(mkRemovedOptionModule [ "security" "acme" "production" ] ''
|
|
Use security.acme.server to define your staging ACME server URL instead.
|
|
|
|
To use the let's encrypt staging server, use security.acme.server =
|
|
"https://acme-staging-v02.api.letsencrypt.org/directory".
|
|
''
|
|
)
|
|
];
|
|
options = {
|
|
security.acme = {
|
|
|
|
validMin = mkOption {
|
|
type = types.int;
|
|
default = 30 * 24 * 3600;
|
|
description = "Minimum remaining validity before renewal in seconds.";
|
|
};
|
|
|
|
renewInterval = mkOption {
|
|
type = types.str;
|
|
default = "weekly";
|
|
description = ''
|
|
Systemd calendar expression when to check for renewal. See
|
|
<citerefentry><refentrytitle>systemd.time</refentrytitle>
|
|
<manvolnum>7</manvolnum></citerefentry>.
|
|
'';
|
|
};
|
|
|
|
server = mkOption {
|
|
type = types.nullOr types.str;
|
|
default = null;
|
|
description = ''
|
|
ACME Directory Resource URI. Defaults to let's encrypt
|
|
production endpoint,
|
|
<literal>https://acme-v02.api.letsencrypt.org/directory</literal>, if unset.
|
|
'';
|
|
};
|
|
|
|
preliminarySelfsigned = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = ''
|
|
Whether a preliminary self-signed certificate should be generated before
|
|
doing ACME requests. This can be useful when certificates are required in
|
|
a webserver, but ACME needs the webserver to make its requests.
|
|
|
|
With preliminary self-signed certificate the webserver can be started and
|
|
can later reload the correct ACME certificates.
|
|
'';
|
|
};
|
|
|
|
certs = mkOption {
|
|
default = { };
|
|
type = with types; attrsOf (submodule certOpts);
|
|
description = ''
|
|
Attribute set of certificates to get signed and renewed. Creates
|
|
<literal>acme-''${cert}.{service,timer}</literal> systemd units for
|
|
each certificate defined here. Other services can add dependencies
|
|
to those units if they rely on the certificates being present,
|
|
or trigger restarts of the service if certificates get renewed.
|
|
'';
|
|
example = literalExample ''
|
|
{
|
|
"example.com" = {
|
|
webroot = "/var/www/challenges/";
|
|
email = "foo@example.com";
|
|
extraDomains = { "www.example.com" = null; "foo.example.com" = "/var/www/foo/"; };
|
|
};
|
|
"bar.example.com" = {
|
|
webroot = "/var/www/challenges/";
|
|
email = "bar@example.com";
|
|
};
|
|
}
|
|
'';
|
|
};
|
|
};
|
|
};
|
|
|
|
###### implementation
|
|
config = mkMerge [
|
|
(mkIf (cfg.certs != { }) {
|
|
|
|
systemd.services = let
|
|
services = concatLists servicesLists;
|
|
servicesLists = mapAttrsToList certToServices cfg.certs;
|
|
certToServices = cert: data:
|
|
let
|
|
lpath = "acme/${cert}";
|
|
rights = if data.allowKeysForGroup then "750" else "700";
|
|
cmdline = [ "-v" "-d" data.domain "--default_root" data.webroot "--valid_min" cfg.validMin ]
|
|
++ optionals (data.email != null) [ "--email" data.email ]
|
|
++ concatMap (p: [ "-f" p ]) data.plugins
|
|
++ concatLists (mapAttrsToList (name: root: [ "-d" (if root == null then name else "${name}:${root}")]) data.extraDomains)
|
|
++ optionals (cfg.server != null || data.server != null) ["--server" (if data.server == null then cfg.server else data.server)];
|
|
acmeService = {
|
|
description = "Renew ACME Certificate for ${cert}";
|
|
after = [ "network.target" "network-online.target" ];
|
|
wants = [ "network-online.target" ];
|
|
# simp_le uses requests, which uses certifi under the hood,
|
|
# which doesn't respect the system trust store.
|
|
# At least in the acme test, we provision a fake CA, impersonating the LE endpoint.
|
|
# REQUESTS_CA_BUNDLE is a way to teach python requests to use something else
|
|
environment.REQUESTS_CA_BUNDLE = "/etc/ssl/certs/ca-certificates.crt";
|
|
serviceConfig = {
|
|
Type = "oneshot";
|
|
SuccessExitStatus = [ "0" "1" ];
|
|
User = data.user;
|
|
Group = data.group;
|
|
PrivateTmp = true;
|
|
StateDirectory = lpath;
|
|
StateDirectoryMode = rights;
|
|
WorkingDirectory = "/var/lib/${lpath}";
|
|
ExecStart = "${pkgs.simp_le}/bin/simp_le ${escapeShellArgs cmdline}";
|
|
ExecStopPost =
|
|
let
|
|
script = pkgs.writeScript "acme-post-stop" ''
|
|
#!${pkgs.runtimeShell} -e
|
|
${data.postRun}
|
|
'';
|
|
in
|
|
"+${script}";
|
|
};
|
|
|
|
};
|
|
selfsignedService = {
|
|
description = "Create preliminary self-signed certificate for ${cert}";
|
|
path = [ pkgs.openssl ];
|
|
script =
|
|
''
|
|
workdir="$(mktemp -d)"
|
|
|
|
# Create CA
|
|
openssl genrsa -des3 -passout pass:xxxx -out $workdir/ca.pass.key 2048
|
|
openssl rsa -passin pass:xxxx -in $workdir/ca.pass.key -out $workdir/ca.key
|
|
openssl req -new -key $workdir/ca.key -out $workdir/ca.csr \
|
|
-subj "/C=UK/ST=Warwickshire/L=Leamington/O=OrgName/OU=Security Department/CN=example.com"
|
|
openssl x509 -req -days 1 -in $workdir/ca.csr -signkey $workdir/ca.key -out $workdir/ca.crt
|
|
|
|
# Create key
|
|
openssl genrsa -des3 -passout pass:xxxx -out $workdir/server.pass.key 2048
|
|
openssl rsa -passin pass:xxxx -in $workdir/server.pass.key -out $workdir/server.key
|
|
openssl req -new -key $workdir/server.key -out $workdir/server.csr \
|
|
-subj "/C=UK/ST=Warwickshire/L=Leamington/O=OrgName/OU=IT Department/CN=example.com"
|
|
openssl x509 -req -days 1 -in $workdir/server.csr -CA $workdir/ca.crt \
|
|
-CAkey $workdir/ca.key -CAserial $workdir/ca.srl -CAcreateserial \
|
|
-out $workdir/server.crt
|
|
|
|
# Copy key to destination
|
|
cp $workdir/server.key /var/lib/${lpath}/key.pem
|
|
|
|
# Create fullchain.pem (same format as "simp_le ... -f fullchain.pem" creates)
|
|
cat $workdir/{server.crt,ca.crt} > "/var/lib/${lpath}/fullchain.pem"
|
|
|
|
# Create full.pem for e.g. lighttpd
|
|
cat $workdir/{server.key,server.crt,ca.crt} > "/var/lib/${lpath}/full.pem"
|
|
|
|
# Give key acme permissions
|
|
chown '${data.user}:${data.group}' "/var/lib/${lpath}/"{key,fullchain,full}.pem
|
|
chmod ${rights} "/var/lib/${lpath}/"{key,fullchain,full}.pem
|
|
'';
|
|
serviceConfig = {
|
|
Type = "oneshot";
|
|
PrivateTmp = true;
|
|
StateDirectory = lpath;
|
|
User = data.user;
|
|
Group = data.group;
|
|
};
|
|
unitConfig = {
|
|
# Do not create self-signed key when key already exists
|
|
ConditionPathExists = "!/var/lib/${lpath}/key.pem";
|
|
};
|
|
};
|
|
in (
|
|
[ { name = "acme-${cert}"; value = acmeService; } ]
|
|
++ optional cfg.preliminarySelfsigned { name = "acme-selfsigned-${cert}"; value = selfsignedService; }
|
|
);
|
|
servicesAttr = listToAttrs services;
|
|
in
|
|
servicesAttr;
|
|
|
|
systemd.tmpfiles.rules =
|
|
flip mapAttrsToList cfg.certs
|
|
(cert: data: "d ${data.webroot}/.well-known/acme-challenge - ${data.user} ${data.group}");
|
|
|
|
systemd.timers = flip mapAttrs' cfg.certs (cert: data: nameValuePair
|
|
("acme-${cert}")
|
|
({
|
|
description = "Renew ACME Certificate for ${cert}";
|
|
wantedBy = [ "timers.target" ];
|
|
timerConfig = {
|
|
OnCalendar = cfg.renewInterval;
|
|
Unit = "acme-${cert}.service";
|
|
Persistent = "yes";
|
|
AccuracySec = "5m";
|
|
RandomizedDelaySec = "1h";
|
|
};
|
|
})
|
|
);
|
|
|
|
systemd.targets.acme-selfsigned-certificates = mkIf cfg.preliminarySelfsigned {};
|
|
systemd.targets.acme-certificates = {};
|
|
})
|
|
|
|
];
|
|
|
|
meta = {
|
|
maintainers = with lib.maintainers; [ abbradar fpletz globin ];
|
|
doc = ./acme.xml;
|
|
};
|
|
}
|