Difference between revisions of "Pam mount"

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(pam_mount installation)
 
m (→‎GDM)
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To have an encrypted home partition mounted automatically when logging in, you can use pam_mount. It will mount your /home (or whatever mount point you like) when you log in using your login manager or when logging in on console. As a requirement the crypted drive's passphrase has to be the same as your user's linux password.
+
[[Category:Security]]
 +
To have an encrypted home partition (encrypted with, for example, LUKS or ecryptfs) mounted automatically when logging in, you can use pam_mount. It will mount your /home (or whatever mount point you like) when you log in using your login manager or when logging in on console. The encrypted drive's passphrase should be the same as your linux user's password, so you do not have to type in two different passphrases to login.
  
 
==General Setup==
 
==General Setup==
  
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#Install pam_mount from the AUR: [http://aur.archlinux.org/packages.php?ID=1976]
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#Install {{pkg|pam_mount}} from the [[Official Repositories]].
 
#Edit /etc/security/pam_mount.conf.xml as follows:
 
#Edit /etc/security/pam_mount.conf.xml as follows:
  
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Insert a new line at the end of the file, but '''before''' the last closing tag, ''</pam_mount>''.
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Insert 2 new lines at the end of the file, but '''before''' the last closing tag, ''</pam_mount>''.
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Replace USERNAME with your linux-username and sdaX with the corresponding device. Add mount options, if needed.
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Notes:
 +
*USERNAME should be replaced with your linux-username.
 +
*/dev/sdaX should be replaced with the corresponding device or container file.
 +
*fstype="auto" can be changed to any <type> that is present in /sbin/mount.<type>. "auto" should work fine in most cases.
 +
*Add mount options, if needed.
  
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{{File|name=/etc/security/pam_mount.conf.xml|content=
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{{hc|/etc/security/pam_mount.conf.xml|2=
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<!--
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'''<volume user="USERNAME" fstype="auto" path="/dev/sdaX" mountpoint="/home" options="fsck,noatime" />'''
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Added 03/16/11
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'''<mkmountpoint enable="1" remove="true" />'''
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-->
 
−
 
 
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<volume user="USERNAME" fstype="crypt" path="/dev/sdaX" mountpoint="/home" options="fsck,noatime" />
 
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<mkmountpoint enable="1" remove="true" />
 
−
 
 
−
<!--
 
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end of changes
 
−
-->
 
  
 
</pam_mount>
 
</pam_mount>
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==Login Manager Configuration==
 
==Login Manager Configuration==
  
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In general, you have to edit the corresponding file in /etc/pam.d . After adding some lines, pam_mount will be called on login. The correct order of entries in each file is important.
+
In general, you have to edit configuration files in /etc/pam.d so that pam_mount will be called on login. The correct order of entries in each file is important. It is probably necessary to change both /etc/pam.d/login and the file for your display manager (e.g., Slim or GDM). Example configuration files follow, with the added lines in bold.
 +
 
 +
{{hc|/etc/pam.d/system-auth|2=
 +
#%PAM-1.0
  
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===[[Slim]]===
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auth      required  pam_env.so
 +
auth      required  pam_unix.so    try_first_pass nullok
 +
'''auth      optional  pam_mount.so'''
 +
auth      optional  pam_permit.so
  
−
{{File|name=/etc/pam.d/slim|content=
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account  required  pam_unix.so
−
auth            requisite      pam_nologin.so
+
account  optional  pam_permit.so
 +
account  required  pam_time.so
 +
 
 +
'''password  optional  pam_mount.so'''
 +
password  required  pam_unix.so    try_first_pass nullok sha512 shadow
 +
password  optional  pam_permit.so
 +
 
 +
'''session  optional  pam_mount.so'''
 +
session  required  pam_limits.so
 +
session  required  pam_env.so
 +
session  required  pam_unix.so
 +
session  optional  pam_permit.so
 +
}}
 +
 
 +
You may need to add similar lines to /etc/pam.d/su and /etc/pam.d/sudo, depending on how you use su and sudo, respectively.
  
−
'''auth            optional        pam_mount.so'''
+
=== [[Slim]] ===
  
 +
{{hc|/etc/pam.d/slim|
 +
auth            requisite      pam_nologin.so
 
auth            required        pam_env.so
 
auth            required        pam_env.so
 
auth            required        pam_unix.so
 
auth            required        pam_unix.so
 +
'''auth            optional        pam_mount.so'''
 
account        required        pam_unix.so
 
account        required        pam_unix.so
 
password        required        pam_unix.so
 
password        required        pam_unix.so
 +
'''password        optional        pam_mount.so'''
 
session        required        pam_limits.so
 
session        required        pam_limits.so
 
session        required        pam_unix.so
 
session        required        pam_unix.so
 +
'''session        optional        pam_mount.so'''
 
session        optional        pam_loginuid.so
 
session        optional        pam_loginuid.so
 
session        optional        pam_ck_connector.so
 
session        optional        pam_ck_connector.so
 +
}}
 +
 +
=== [[GDM]] ===
 +
 +
Note that the configuration file has changed to be /etc/pam.d/gdm-password (instead of /etc/pam.d/gdm) as of GDM version 3.2.
  
 +
{{hc|/etc/pam.d/gdm.password|2=
 +
#%PAM-1.0
 +
auth            requisite      pam_nologin.so
 +
auth            required        pam_env.so
 +
 +
auth            requisite      pam_unix.so nullok
 +
'''auth         optional        pam_mount.so'''
 +
auth            optional        pam_gnome_keyring.so
 +
 +
auth            sufficient      pam_succeed_if.so uid >= 1000 quiet
 +
auth            required        pam_deny.so
 +
 +
account        required        pam_unix.so
 +
 +
password        required        pam_unix.so
 +
'''password        optional        pam_mount.so'''
 +
 +
session        required        pam_loginuid.so
 +
-session        optional        pam_systemd.so
 +
session        optional        pam_keyinit.so force revoke
 +
session        required        pam_limits.so
 +
session        required        pam_unix.so
 
'''session        optional        pam_mount.so'''
 
'''session        optional        pam_mount.so'''
 +
session        optional        pam_gnome_keyring.so auto_start
 
}}
 
}}

Revision as of 05:55, 27 December 2012

To have an encrypted home partition (encrypted with, for example, LUKS or ecryptfs) mounted automatically when logging in, you can use pam_mount. It will mount your /home (or whatever mount point you like) when you log in using your login manager or when logging in on console. The encrypted drive's passphrase should be the same as your linux user's password, so you do not have to type in two different passphrases to login.

General Setup

  1. Install pam_mount from the Official Repositories.
  2. Edit /etc/security/pam_mount.conf.xml as follows:

Insert 2 new lines at the end of the file, but before the last closing tag, </pam_mount>. Notes:

  • USERNAME should be replaced with your linux-username.
  • /dev/sdaX should be replaced with the corresponding device or container file.
  • fstype="auto" can be changed to any <type> that is present in /sbin/mount.<type>. "auto" should work fine in most cases.
  • Add mount options, if needed.
/etc/security/pam_mount.conf.xml
<volume user="USERNAME" fstype="auto" path="/dev/sdaX" mountpoint="/home" options="fsck,noatime" />
<mkmountpoint enable="1" remove="true" />

</pam_mount>

Login Manager Configuration

In general, you have to edit configuration files in /etc/pam.d so that pam_mount will be called on login. The correct order of entries in each file is important. It is probably necessary to change both /etc/pam.d/login and the file for your display manager (e.g., Slim or GDM). Example configuration files follow, with the added lines in bold. 

/etc/pam.d/system-auth
#%PAM-1.0

auth      required  pam_env.so
auth      required  pam_unix.so     try_first_pass nullok
auth      optional  pam_mount.so
auth      optional  pam_permit.so

account   required  pam_unix.so
account   optional  pam_permit.so
account   required  pam_time.so

password  optional  pam_mount.so
password  required  pam_unix.so     try_first_pass nullok sha512 shadow
password  optional  pam_permit.so

session   optional  pam_mount.so
session   required  pam_limits.so
session   required  pam_env.so
session   required  pam_unix.so
session   optional  pam_permit.so

You may need to add similar lines to /etc/pam.d/su and /etc/pam.d/sudo, depending on how you use su and sudo, respectively.

Slim

/etc/pam.d/slim
auth            requisite       pam_nologin.so
auth            required        pam_env.so
auth            required        pam_unix.so
auth            optional        pam_mount.so
account         required        pam_unix.so
password        required        pam_unix.so
password        optional        pam_mount.so
session         required        pam_limits.so
session         required        pam_unix.so
session         optional        pam_mount.so
session         optional        pam_loginuid.so
session         optional        pam_ck_connector.so

GDM

Note that the configuration file has changed to be /etc/pam.d/gdm-password (instead of /etc/pam.d/gdm) as of GDM version 3.2. 

/etc/pam.d/gdm.password
#%PAM-1.0
auth            requisite       pam_nologin.so
auth            required        pam_env.so

auth            requisite       pam_unix.so nullok
auth	        optional        pam_mount.so
auth            optional        pam_gnome_keyring.so

auth            sufficient      pam_succeed_if.so uid >= 1000 quiet
auth            required        pam_deny.so

account         required        pam_unix.so

password        required        pam_unix.so
password        optional        pam_mount.so

session         required        pam_loginuid.so
-session        optional        pam_systemd.so
session         optional        pam_keyinit.so force revoke
session         required        pam_limits.so
session         required        pam_unix.so
session         optional        pam_mount.so
session         optional        pam_gnome_keyring.so auto_start
Retrieved from "https://wiki.archlinux.org/index.php?title=Pam_mount&oldid=241844"