DragonFly On-Line Manual Pages

AESGET(1)              DragonFly General Commands Manual             AESGET(1)

NAME
     aesget - decrypt data using Rijndael, the Advanced Encryption Standard
     winner

SYNOPSIS
     aesget -k keyfile [-s keysize]

DESCRIPTION
     The aesget utility decrypts data using the Rijndael algorithm, the winner
     of the Advanced Encryption Standard (AES) competition.  The decryption is
     done in Cipher Block Feedback (CFB-128) mode, with the salt read from the
     first 128 bits (16 bytes) of the encrypted data as generated by the
     aescrypt(1) utility.  The encrypted data (including the salt) is read
     from standard input and the decrypted plaintext is written to standard
     output.

     The decryption key may be read from standard input or from a file,
     depending on the argument passed to the -k command-line option.  If "-"
     is used as a filename, the aesget utility reads as many hexadecimal
     digits as needed from standard input and then one additional byte to
     allow for a newline separating the key from the actual data to be
     decrypted.  If the filename is not "-", the aesget utility opens the
     specified file and reads text lines from it until a line starting with
     the characters kk= is reached.  Those characters should be immediately
     followed by as many hexadecimal digits as needed; the rest of the line,
     as well as the rest of the file, is ignored.

     The decryption key may be 128, 192, or 256 bits long.  By default, the
     aesget utility uses (and expects to read) a 128-bit key, unless a
     different size is supplied by the -s keysize command-line option.

EXAMPLES
     Decrypt the contents of the /etc/hosts file with a key (128-bit by
     default) read from a file:

           aesget -k key.txt < hosts.aes > hosts.txt

     Decrypt a file with a 192-bit key supplied directly:

           (echo '012345678901234567890123456789012345678901234567'; cat
           test.aes) | ./aesget -s 192 -k -

SEE ALSO
     aescrypt(1)

     The SourceForge project page: http://sourceforge.net/projects/aescrypt/

HISTORY
     The aesget utility was written by Eric Lee Green, and was modified to use
     Rijndael rather than Twofish by Randy Kaelber.  It uses the freely
     available Rijndael implementation by Antoon Bosselaers and Vincent
     Rijmen.  This manual page was written by Peter Pentchev in 2008.

AUTHORS
     The aesget utility - Eric Lee Green <eric@badtux.org>, Randy Kaelber
     <randyk@sourceforge.net>.

     The manual page - Peter Pentchev <roam@ringlet.net>.

DragonFly 6.5-DEVELOPMENT        June 8, 2008        DragonFly 6.5-DEVELOPMENT