cifstab 1.0.36

Mount cifs shares using encrypted passwords

Cifstab

Mount cifs shares using encrypted credentials

Cifstab is a simple python script which encrypts and stores cifs credentials.
In short, it is a wrap around 'mount -t cifs' with user credentials encrypted and stored in a sqlite database.

Formally named cifscloak, cifstab is the new and more appropriate name.

Tested so far

Ubuntu 20.04, Redhat, Centos, Oracle Linux, python3.8.

Quick start:

1/ Install

Latest: sudo pip3 install git+https://github.com/sudoofus/cifstab.git
sudo python3 -m pip install cifstab

Script installs to:
/usr/local/bin/cifstab
Included the original cifscloak console script for backwards compatibility ( /usr/local/bin/cifscloak ), some day this will be deprecated.

'cifsfs' command has now been removed.

2/ Create an encrypted cifstab and add cifs mounts.
cifstab addmount --name <give_name_to_mount> --sharename <share_name> --mountpoint <mount_point> --i <cifs_server_address> --options <cifs_mount_options> --user cifsusername

sudo cifstab addmount -n films -s myfilms -m /mnt/films -i myfileserver -o "ro" -u cifsuser
Password:

sudo cifstab addmount -n games -s mygames -m /mnt/games -i myfileserver -u cifsuser
Password:

3/ Mount one or more cifs shares.
cifstab mount --names
Or mount all shares.
cifstab mount -a

sudo cifstab mount -n films games

4/ Unmount one or more cifs shares.
cifstab mount -u --names
Or unmount all cifs shares named in cifstab
cifstab mount -u -a

sudo cifstab -u -n films games

5/ List cifs share aliases stored in the cifstab.

sudo cifstab listmounts

{
"films": {
"name": "films",
"host": "myfileserver",
"share": "myfilms",
"mountpoint": "/mnt/films",
"options": "ro"
},
"games": {
"name": "games",
"host": "myfileserver",
"share": "mygames",
"mountpoint": "/mnt/games",
"options": ""
}
}

6/ Remove one or more cifs shares from the cifstab.
cifstab removemounts --names

sudo cifstab removemounts -n films games

7/ Create systemd file.

sudo cifstab systemdfile -a

#Generated by cifstab
[Unit]
After=multi-user.target
Description=cifstab

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/local/bin/cifstab mount -a -r 6
ExecStop=/usr/local/bin/cifstab mount -u -a

[Install]
WantedBy=multi-user.target

sudo cifstab systemdfile -a > /etc/systemd/system/cifstab.service
systemctl enable cifstab
systemctl start cifstab

Uninstall

python3 -m pip uninstall cifstab
rm /root/.cifstab

Synopsis

This utility should be run through sudo or directly as root.

When executed as the root user the following directory and files are created the first time that the script is executed:

0755 /root/.cifstab/
0400 /root/.cifstab/.keyfile
0644 /root/.cifstab/.cifstab.db

cryptography.fernet is used to generate the .keyfile and take care of encryption.
sqlite3 is used to store encrypted cifs information into /root/.cifstab/.cifstab.db

Of course if you have the .keyfile and cifstab.db it is really easy to decrypt and display the passwords.
Be sure that the cifstab script is not writable by anyone except root otherwise it would be trivial for a user to modify the script to have it write out the passwords somewhere next time the script is executed.

For example:

550 /usr/bin/cifstab

The .cifstab directory is created in the home (~) directory of the user running the script, the directory can also be overridden with environment variable 'CIFSTAB_HOME' e.g.

export CIFSTAB_HOME='/home/sudoofus'

This will have the effect of creating the following .cifstab directory

/home/sudoofus/.cifstab/

Alternatively the .cifstab directory is created in the home directory of whichever user is running the script.

Example

sudo cifstab addmount -n films -s myfilms -m /mnt/films -i myfileserver -o "ro" -u cifsuser
Password:

sqlite> .schema cifstab

        name,
        address,
        sharename,
        mountpoint,
        options,
        user,
        password,
        PRIMARY KEY (name)
        );

Everything apart from the name rests encypted.
sqlite> select * from cifstab;

films|gAAAAABl0KUkN57RMohIrenfwERNZYzEWqDZSGC50o-vwp1rcNkZMDk_5aD1XSpRJQplC3JmGBLJn9DqKwOHqAIVqUZscMAdpA==|gAAAAABl0KUlINxD3l2xtTCclaHz7YqWTh-GeyyYRhmWNeKVI6C3CoAQb4nEd_bKGSAb2tfevFuZnv6snkcTLYuf3I4GT30LSw==|gAAAAABl0KUlXF42gwBXOq3lAe7McKPrp9eWgY4ecCFP9Qmh0rIef42_vckACXvLtu-Fwi5ApO1Kb9waLTrSUNzLdXGgoBZoXQ==|gAAAAABl0KUlLg927C7PlSteAfpG0q2BNRpcFshsbWfSWxqH5JB9tIK2g0Mduh-ckStYOP0OiCV2xByvKufzboTrUjy61rb1wg==|gAAAAABl0KUlWBGAzK4NjGdOOUjKGZA3kE09AG0Pjsadi-5URVsQMBh5IRFMU-zjTuTlg5vrAjNLoMQIbt-QmOw-BCihM3taWQ==|gAAAAABl0KUlkuWEBToAaeig1vgFSFi5dIjQnlT5e4JkwVES8hoMtQvf_6UK3MRUm0vdEhXuRmoPvRqE0SYyPXtqiN1W2z07MRPHdHO27TbbcAvnE8SNQFTq9uSRR452cUQMje6CQ643

Mount cifs shares at boot time through systemd

Cifstab can generate a simple systemd file that seems to work fine for me on Ubuntu and Centos 8.
Initially I did not write in any retry mechanism because it just felt sloppy but after systemd gave me a bit of a ride ( through my lack of understanding ) and after reading the documentation ( which suggested that causing the boot to wait is bad ), I instead wrote in a retry. Retrying 6 times seems to get the mounts sorted during boot, -r 6 is added to the systemd file by default.

• Mountpoint directories are automatically created with default permissions.

Help

cifstab -h

usage: cifstab [-h] {addmount,mount,removemounts,listmounts} ...

cifstab - command line utility for mounting cifs shares using encrypted passwords

positional arguments:
{addmount,mount,removemounts,listmounts}
Subcommands
addmount Add a cifs mount to cifstab, addmount -h for help
mount Mount cifs shares, mount -h for help
removemounts Remove cifs mounts from cifstab. removemount -h for help
listmounts Display cifstab shares

optional arguments:
-h, --help show this help message and exit

cifstab addmount -h

usage: cifstab addmount [-h] -n NAME -s SHARENAME -i IPADDRESS -m MOUNTPOINT -u USER [-o OPTIONS]

optional arguments:
-h, --help show this help message and exit
-n NAME, --name NAME Connection name e.g identifying server name
-s SHARENAME, --sharename SHARENAME
Share name
-i IPADDRESS, --ipaddress IPADDRESS
Server address or ipaddress
-m MOUNTPOINT, --mountpoint MOUNTPOINT
Mount point
-u USER, --user USER User name
-p PASSWORD, --password PASSWORD
Allows a password to be specified on the command line, otherwise getpass is used and password entry is hidden
-o OPTIONS, --options OPTIONS
Quoted csv options e.g. "domain=mydomain,ro"

cifstab removemounts -h

usage: cifstab removemounts [-h] -n NAMES [NAMES ...]

optional arguments:
-h, --help show this help message and exit
-n NAMES [NAMES ...], --names NAMES [NAMES ...]
Remove cifs mounts e.g. -a films music

cifstab mount -h

usage: cifstab mount [-h] [-u] [-r RETRIES] [-w WAITSECS] (-n NAMES [NAMES ...] | -a)

optional arguments:
-h, --help show this help message and exit
-u Unmount the named cifs shares, e.g -a films music
-r RETRIES, --retries RETRIES
Optional ( default: 3 ) - Retry count, useful when systemd is in play
-w WAITSECS, --waitsecs WAITSECS
Optional ( default: 5 seconds ) - Wait time in seconds between retries
-n NAMES [NAMES ...], --names NAMES [NAMES ...]
Mount reference names, e.g -n films music. --names and --all are mutually exclusive
-a, --all Mount everything in the cifstab.

cifstab systemdfile -h

usage: cifstab systemdfile [-h] (-n NAMES [NAMES ...] | -a)

optional arguments:
-h, --help show this help message and exit
-n NAMES [NAMES ...], --names NAMES [NAMES ...]
Add named shares to the systemd unit file
-a, --all Add all cifstab shares to the systemd unit file

Shout out

Thank you to mgazzin ( https://github.com/mgazzin ) for suggesting CIFSTAB_HOME, implemented in v1.0.27

Thank you to thesnipiid ( https://github.com/thesnipiid ) for improving reliability by suggesting quotes around the password field, implemented in v1.0.27