blob: 11cc13a8cbeb2cb9e858a29ffbd7c347adb1d944 (
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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.security.pam.mount;
oflRequired = cfg.logoutHup || cfg.logoutTerm || cfg.logoutKill;
fake_ofl = pkgs.writeShellScriptBin "fake_ofl" ''
SIGNAL=$1
MNTPT=$2
${pkgs.lsof}/bin/lsof | ${pkgs.gnugrep}/bin/grep $MNTPT | ${pkgs.gawk}/bin/awk '{print $2}' | ${pkgs.findutils}/bin/xargs ${pkgs.util-linux}/bin/kill -$SIGNAL
'';
anyPamMount = any (attrByPath ["pamMount"] false) (attrValues config.security.pam.services);
in
{
options = {
security.pam.mount = {
enable = mkOption {
type = types.bool;
default = false;
description = lib.mdDoc ''
Enable PAM mount system to mount fileystems on user login.
'';
};
extraVolumes = mkOption {
type = types.listOf types.str;
default = [];
description = lib.mdDoc ''
List of volume definitions for pam_mount.
For more information, visit <http://pam-mount.sourceforge.net/pam_mount.conf.5.html>.
'';
};
additionalSearchPaths = mkOption {
type = types.listOf types.package;
default = [];
example = literalExpression "[ pkgs.bindfs ]";
description = lib.mdDoc ''
Additional programs to include in the search path of pam_mount.
Useful for example if you want to use some FUSE filesystems like bindfs.
'';
};
fuseMountOptions = mkOption {
type = types.listOf types.str;
default = [];
example = literalExpression ''
[ "nodev" "nosuid" "force-user=%(USER)" "gid=%(USERGID)" "perms=0700" "chmod-deny" "chown-deny" "chgrp-deny" ]
'';
description = lib.mdDoc ''
Global mount options that apply to every FUSE volume.
You can define volume-specific options in the volume definitions.
'';
};
debugLevel = mkOption {
type = types.int;
default = 0;
example = 1;
description = lib.mdDoc ''
Sets the Debug-Level. 0 disables debugging, 1 enables pam_mount tracing,
and 2 additionally enables tracing in mount.crypt. The default is 0.
For more information, visit <http://pam-mount.sourceforge.net/pam_mount.conf.5.html>.
'';
};
logoutWait = mkOption {
type = types.int;
default = 0;
description = lib.mdDoc ''
Amount of microseconds to wait until killing remaining processes after
final logout.
For more information, visit <http://pam-mount.sourceforge.net/pam_mount.conf.5.html>.
'';
};
logoutHup = mkOption {
type = types.bool;
default = false;
description = lib.mdDoc ''
Kill remaining processes after logout by sending a SIGHUP.
'';
};
logoutTerm = mkOption {
type = types.bool;
default = false;
description = lib.mdDoc ''
Kill remaining processes after logout by sending a SIGTERM.
'';
};
logoutKill = mkOption {
type = types.bool;
default = false;
description = lib.mdDoc ''
Kill remaining processes after logout by sending a SIGKILL.
'';
};
createMountPoints = mkOption {
type = types.bool;
default = true;
description = lib.mdDoc ''
Create mountpoints for volumes if they do not exist.
'';
};
removeCreatedMountPoints = mkOption {
type = types.bool;
default = true;
description = lib.mdDoc ''
Remove mountpoints created by pam_mount after logout. This
only affects mountpoints that have been created by pam_mount
in the same session.
'';
};
};
};
config = mkIf (cfg.enable || anyPamMount) {
environment.systemPackages = [ pkgs.pam_mount ];
environment.etc."security/pam_mount.conf.xml" = {
source =
let
extraUserVolumes = filterAttrs (n: u: u.cryptHomeLuks != null || u.pamMount != {}) config.users.users;
mkAttr = k: v: ''${k}="${v}"'';
userVolumeEntry = user: let
attrs = {
user = user.name;
path = user.cryptHomeLuks;
mountpoint = user.home;
} // user.pamMount;
in
"<volume ${concatStringsSep " " (mapAttrsToList mkAttr attrs)} />\n";
in
pkgs.writeText "pam_mount.conf.xml" ''
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE pam_mount SYSTEM "pam_mount.conf.xml.dtd">
<!-- auto generated from Nixos: modules/config/users-groups.nix -->
<pam_mount>
<debug enable="${toString cfg.debugLevel}" />
<!-- if activated, requires ofl from hxtools to be present -->
<logout wait="${toString cfg.logoutWait}" hup="${if cfg.logoutHup then "yes" else "no"}" term="${if cfg.logoutTerm then "yes" else "no"}" kill="${if cfg.logoutKill then "yes" else "no"}" />
<!-- set PATH variable for pam_mount module -->
<path>${makeBinPath ([ pkgs.util-linux ] ++ cfg.additionalSearchPaths)}</path>
<!-- create mount point if not present -->
<mkmountpoint enable="${if cfg.createMountPoints then "1" else "0"}" remove="${if cfg.removeCreatedMountPoints then "true" else "false"}" />
<!-- specify the binaries to be called -->
<fusemount>${pkgs.fuse}/bin/mount.fuse %(VOLUME) %(MNTPT) -o ${concatStringsSep "," (cfg.fuseMountOptions ++ [ "%(OPTIONS)" ])}</fusemount>
<fuseumount>${pkgs.fuse}/bin/fusermount -u %(MNTPT)</fuseumount>
<cryptmount>${pkgs.pam_mount}/bin/mount.crypt %(VOLUME) %(MNTPT)</cryptmount>
<cryptumount>${pkgs.pam_mount}/bin/umount.crypt %(MNTPT)</cryptumount>
<pmvarrun>${pkgs.pam_mount}/bin/pmvarrun -u %(USER) -o %(OPERATION)</pmvarrun>
${optionalString oflRequired "<ofl>${fake_ofl}/bin/fake_ofl %(SIGNAL) %(MNTPT)</ofl>"}
${concatStrings (map userVolumeEntry (attrValues extraUserVolumes))}
${concatStringsSep "\n" cfg.extraVolumes}
</pam_mount>
'';
};
};
}
|