nixpkgs/nixos/modules/security/ca.nix
Keshav Kini 348858f297 nixos/security.pki: handle PEMs w/o a final newline
According to the ABNF grammar for PEM files described in [RFC
7468][1], an eol character (i.e. a newline) is not mandatory after the
posteb line (i.e. "-----END CERTIFICATE-----" in the case of
certificates).

This commit makes our CA certificate bundler expression account for
the possibility that files in config.security.pki.certificateFiles
might not have final newlines, by using `awk` instead of `cat` to
concatenate them. (`awk` prints a final newline from each input file
even if the file doesn't end with a newline.)

[1]: https://datatracker.ietf.org/doc/html/rfc7468#section-3
2021-05-16 17:23:11 -07:00

90 lines
2.5 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.security.pki;
cacertPackage = pkgs.cacert.override {
blacklist = cfg.caCertificateBlacklist;
};
caCertificates = pkgs.runCommand "ca-certificates.crt" {
files = cfg.certificateFiles ++ [ (builtins.toFile "extra.crt" (concatStringsSep "\n" cfg.certificates)) ];
preferLocalBuild = true;
} "awk 1 $files > $out"; # awk ensures a newline between each pair of consecutive files
in
{
options = {
security.pki.certificateFiles = mkOption {
type = types.listOf types.path;
default = [];
example = literalExample "[ \"\${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt\" ]";
description = ''
A list of files containing trusted root certificates in PEM
format. These are concatenated to form
<filename>/etc/ssl/certs/ca-certificates.crt</filename>, which is
used by many programs that use OpenSSL, such as
<command>curl</command> and <command>git</command>.
'';
};
security.pki.certificates = mkOption {
type = types.listOf types.str;
default = [];
example = literalExample ''
[ '''
NixOS.org
=========
-----BEGIN CERTIFICATE-----
MIIGUDCCBTigAwIBAgIDD8KWMA0GCSqGSIb3DQEBBQUAMIGMMQswCQYDVQQGEwJJ
TDEWMBQGA1UEChMNU3RhcnRDb20gTHRkLjErMCkGA1UECxMiU2VjdXJlIERpZ2l0
...
-----END CERTIFICATE-----
'''
]
'';
description = ''
A list of trusted root certificates in PEM format.
'';
};
security.pki.caCertificateBlacklist = mkOption {
type = types.listOf types.str;
default = [];
example = [
"WoSign" "WoSign China"
"CA WoSign ECC Root"
"Certification Authority of WoSign G2"
];
description = ''
A list of blacklisted CA certificate names that won't be imported from
the Mozilla Trust Store into
<filename>/etc/ssl/certs/ca-certificates.crt</filename>. Use the
names from that file.
'';
};
};
config = {
security.pki.certificateFiles = [ "${cacertPackage}/etc/ssl/certs/ca-bundle.crt" ];
# NixOS canonical location + Debian/Ubuntu/Arch/Gentoo compatibility.
environment.etc."ssl/certs/ca-certificates.crt".source = caCertificates;
# Old NixOS compatibility.
environment.etc."ssl/certs/ca-bundle.crt".source = caCertificates;
# CentOS/Fedora compatibility.
environment.etc."pki/tls/certs/ca-bundle.crt".source = caCertificates;
};
}