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des(n) 0.8.2 "Data Encryption Standard (DES)"

NAME

des - Perform DES encryption of Tcl data

    TABLE OF CONTENTS
    SYNOPSIS
    DESCRIPTION
    COMMANDS
    EXAMPLES
    AUTHORS
    SEE ALSO
    KEYWORDS
    COPYRIGHT

SYNOPSIS

package require Tcl 8.3
package require des 0.8.2

::DES::des -mode encode|decode -key string (-file filename | ?--? string)

DESCRIPTION

This is a Tcl implementation of the Data Encryption Standard (DES) written by Jochen Loewer and based upon an implementation by Eric Young.

NOTE: this version only implements the Electronic Code Book (ECB) mode of DES. This is NOT suitable for general use encryption of large blocks or streams of data. Until Cipher Block Chaining (CBC) or Cipher/Output Feed Back (CFB / OFB) modes are implemented this should not be considered for real encryption. The Trfcrypt package has C-based implementations of these modes.

COMMANDS

::DES::des -mode encode|decode -key string (-file filename | ?--? string): Encode or decode a string or file.

EXAMPLES

% set ciphertext [DES::des -mode encode -key $secret $plaintext]
% set plaintext [DES::des -mode decode -key $secret $ciphertext]

% set ciphertext [DES::des -mode encode -key $secret -file $filename]
% set f [open $filename.des w] ; puts -nonewline $ciphertext ; close $f
% set plaintext [DES::des -mode decode -key $secret -file $filename.des]

des(n) 0.8.2 "Data Encryption Standard (DES)"

Copyright © 2004 for compilation: ActiveState