SavvyAdmin.com » Tar http://savvyadmin.com For savvy admins everywhere... Fri, 21 Jan 2011 17:53:27 +0000 en hourly 1 http://wordpress.org/?v=3.3.2 Symmetric Key Encryption with GnuPG http://savvyadmin.com/symmetric-key-encryption-with-gnupg/ http://savvyadmin.com/symmetric-key-encryption-with-gnupg/#comments Thu, 05 Nov 2009 03:59:06 +0000 gmendoza http://www.savvyadmin.com/?p=438
  • Perform GnuPG Functions Within Vim
  • GnuPG Context Menu Options for Gnome Nautilus
    • ]]>     If you ever want to quickly protect a file by encrypting it with a simple password, you can use GnuPG and symmetric key encryption for the job. Using this method, you can use industry strength encryption like AES256 and not have to worry about public and private keys. Just remember your password and use PGP compatible software to decrypt the files when needed.

    For example, this is how you can encrypt a zip file called backup.zip and output the result to a new file called backup.zip.gpg.

    gpg --symmetric --cipher-algo aes256 -o backup.zip.gpg backup.zip
    Enter passphrase: *******
    Repeat passphrase: *******

    To decrypt the file, the following will work.

    gpg -d -o backup.zip backup.zip.gpg
    gpg: AES256 encrypted data
    Enter passphrase: *******
    gpg: encrypted with 1 passphrase

    For fun, here’s how to create a Gzip Tar archive (tar.gz) and encrypt it on the fly.

    tar czvpf - SomeFiles/ | gpg --symmetric --cipher-algo aes256 -o backup.tar.gz.gpg
    Enter passphrase: *******
    Repeat passphrase: *******

    To decrypt and extract in a single command, the following also works.

    gpg -d backup.tar.gz.gpg | tar xzvf -
    gpg: AES256 encrypted data
    Enter passphrase: *******
    gpg: encrypted with 1 passphrase

    If you’re curious to know what other ciphers are available to you, simple use the gpg --version command.

    gpg --version | grep Cipher
    Cipher: 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH

    Related posts:

    1. Perform GnuPG Functions Within Vim
    2. GnuPG Context Menu Options for Gnome Nautilus

    ]]>     http://savvyadmin.com/symmetric-key-encryption-with-gnupg/feed/ 1     Extract NT Backup Files in Linux Using mtftar http://savvyadmin.com/extract-nt-backup-files-in-linux-using-mtftar/ http://savvyadmin.com/extract-nt-backup-files-in-linux-using-mtftar/#comments Sun, 27 Jan 2008 01:16:36 +0000 gmendoza http://www.savvyadmin.com/2008/01/26/extract-nt-backup-files-in-linux-using-mtftar/ If you would like to extract the contents of an NT backup (.bkf) file in Linux, mtftar is a utility that translates a Microsoft Tape Format (MTF) stream into the tar format. You can pick up mtftar from the authors site at http://gpl.internetconnection.net.

    To get started, download the source code and compile.

    $ wget http://gpl.internetconnection.net/files/mtftar.tar.gz
$ tar zxfv mtftar.tar.gz
$ cd mtftar
$ make
$ sudo cp mtftar /usr/bin/
- or -
$ su -c "cp mtftar /usr/bin/"

    Using this utility is straight forward, as shown in the following example.

    $ mtftar < MyBackup.bkf | tar xvf -
C:
C:/Stuff/Pictures/Misc Family Photos
C:/Stuff/Pictures/Misc Family Photos/First Bikes
C:/Stuff/Pictures/Misc Family Photos/First Bikes/First Bikes 001.jpg
C:/Stuff/Pictures/Misc Family Photos/First Bikes/First Bikes 002.jpg
C:/Stuff/Pictures/Misc Family Photos/First Bikes/First Bikes 003.jpg
C:/Stuff/Pictures/Misc Family Photos/First Bikes/First Bikes 004.jpg
C:/Stuff/Pictures/Misc Family Photos/First Bikes/First Bikes 005.jpg

    An alternate mtf reader for Linux can be found here at http://laytongraphics.com/mtf/. The site also references a PDF written by Seagate that describes the MTF format if you're interested.

    No related posts.

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