blob: ef74a30244f49ee28465ad0663312cbfedd6ca08 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
{
description = "Secrets handling";
outputs = { self }: {
nixosModule = { config, lib, pkgs, ... }: {
options.secrets = with lib; {
keys = mkOption {
type = types.attrsOf (types.submodule {
options = {
isTemplated = mkOption {
type = types.bool;
default = true;
description = "If the file is a gucci template that needs to be resolved";
};
isDir = mkOption {
type = types.bool;
default = false;
description = "If the entry is a directory";
};
group = mkOption {
type = types.str;
default = "root";
description = "Group to associate to the entry";
};
user = mkOption {
type = types.str;
default = "root";
description = "User to associate to the entry";
};
permissions = mkOption {
type = types.str;
default = "0600";
description = "Permissions to associate to the entry";
};
text = mkOption {
type = types.str;
description = "Content of the entry";
};
};
});
default = {};
description = "Keys attrs to upload to the server";
apply = lib.mapAttrsToList (dest: v: v // { inherit dest; });
};
gpgKeys = mkOption {
type = types.listOf types.path;
default = [];
description = "GPG public keys files to encrypt to";
};
ageKeys = mkOption {
type = types.listOf types.str;
default = [];
description = "AGE keys to encrypt to";
};
decryptKey = mkOption {
type = types.str;
default = "/etc/ssh/ssh_host_ed25519_key";
description = "ed25519 key used to decrypt with AGE";
};
location = mkOption {
type = types.path;
default = "/var/secrets";
description = "Location where to put the keys";
};
secretsVars = mkOption {
type = types.path;
description = "Location where the secrets variables are defined, to be used to fill the templates in secrets";
};
deleteSecretsVars = mkOption {
type = types.bool;
default = false;
description = "Delete secrets file after deployment";
};
# Read-only variables
fullPaths = mkOption {
type = types.attrsOf types.path;
default = builtins.listToAttrs
(map (v: { name = v.dest; value = "${config.secrets.location}/${v.dest}"; }) config.secrets.keys);
readOnly = true;
description = "set of full paths to secrets";
};
};
config = let
location = config.secrets.location;
keys = config.secrets.keys;
empty = pkgs.runCommand "empty" { preferLocalBuild = true; } "mkdir -p $out && touch $out/done";
fpath = v: "secrets/${v.dest}${lib.optionalString v.isTemplated ".gucci.tpl"}";
dumpKey = v:
if v.isDir then
''
mkdir -p secrets/${v.dest}
cat >> mods <<EOF
${v.user} ${v.group} ${v.permissions} secrets/${v.dest}
EOF
''
else ''
mkdir -p secrets/$(dirname ${v.dest})
echo -n ${lib.strings.escapeShellArg v.text} > ${fpath v}
cat >> mods <<EOF
${v.user} ${v.group} ${v.permissions} ${fpath v}
EOF
'';
secrets = pkgs.runCommand "secrets.tar.enc" {
buildInputs = [ pkgs.gnupg pkgs.sops ];
} ''
touch mods
tar --format=ustar --mtime='1970-01-01' -P --transform="s@${empty}@secrets@" -cf $out ${empty}/done
${builtins.concatStringsSep "\n" (map dumpKey keys)}
cat mods | while read u g p k; do
tar --no-recursion --format=ustar --mtime='1970-01-01' --owner="$u" --group="$g" --mode="$p" --append -f $out "$k"
done
export HOME=$(pwd)
fingerprints=
for key in ${builtins.concatStringsSep " " config.secrets.gpgKeys}; do
gpg --import $key 2>/dev/null
fingerprints=$fingerprints,$(cat $key | gpg --with-colons --import-options show-only --import 2>/dev/null | grep ^fpr | cut -d: -f10 | head -n1)
done
sops --age ${builtins.concatStringsSep "," config.secrets.ageKeys} --pgp ''${fingerprints#,} --input-type binary -i -e $out 2>/dev/null
'';
pathChmodExcl =
let
dirs = builtins.filter (v: v.isDir) keys;
exclPath = builtins.concatStringsSep " -o " (map (d: " -path $TMP/${d.dest}") dirs);
in
lib.optionalString (builtins.length dirs > 0) " -not \\( ${exclPath} \\) ";
in lib.mkIf (builtins.length keys > 0) {
system.activationScripts.secrets = {
deps = [ "users" "wrappers" ];
text = ''
install -m0750 -o root -g keys -d ${location}
TMP=$(${pkgs.coreutils}/bin/mktemp -d)
TMPWORK=$(${pkgs.coreutils}/bin/mktemp -d)
chmod go-rwx $TMPWORK
if [ -n "$TMP" -a -n "$TMPWORK" ]; then
install -m0750 -o root -g keys -d $TMP
${pkgs.ssh-to-age}/bin/ssh-to-age -private-key -i ${config.secrets.decryptKey} -o $TMPWORK/keys.txt
SOPS_AGE_KEY_FILE=$TMPWORK/keys.txt ${pkgs.sops}/bin/sops -d ${secrets} | ${pkgs.gnutar}/bin/tar --strip-components 1 -C $TMP -x
if [ -f ${config.secrets.secretsVars} ]; then
SOPS_AGE_KEY_FILE=$TMPWORK/keys.txt ${pkgs.sops}/bin/sops -d ${config.secrets.secretsVars} > $TMPWORK/vars.yml
fi
if [ -f $TMPWORK/vars.yml ]; then
find $TMP -name "*.gucci.tpl" -exec \
/bin/sh -c 'f="{}"; ${pkgs.gucci}/bin/gucci -f '$TMPWORK'/vars.yml "$f" > "''${f%.gucci.tpl}"; touch --reference "$f" ''${f%.gucci.tpl} ; chmod --reference="$f" ''${f%.gucci.tpl} ; chown --reference="$f" ''${f%.gucci.tpl}' \;
fi
find $TMP -type d ${pathChmodExcl}-exec chown root:keys {} \; -exec chmod o-rx {} \;
${pkgs.rsync}/bin/rsync --exclude="*.gucci.tpl" -O -c -av --delete $TMP/ ${location}
rm -rf $TMP $TMPWORK ${lib.optionalString config.secrets.deleteSecretsVars config.secrets.secretsVars}
fi
'';
};
};
};
};
}
|
