Package COM.INFORMATIMAGO.COMMON-LISP.CESARUM.TEA


This package imlements the TEA, Tiny Encryption Algorithm.

Tiny Encryption Algorithm:
<http://web.archive.org/web/20070929150931/http://www.simonshepherd.supanet.com/tea.htm>

Note:      This algorithm as weaknesses.
See also:  COM.INFORMATIMAGO.COMMON-LISP.CESARUM.RAIDEN

License:

    AGPL3

    Copyright Pascal J. Bourguignon 2006 - 2012

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.
    If not, see <http://www.gnu.org/licenses/>

(tea-decipher v w k)

function

DO:     Decipher the code vector V, storing the decrypted clear text
        in the vector W, using the key K.
V:      The code: a vector of two 32-bit words.
W:      The clear text: a vector of two 32-bit words.
K:      The key: a vector of four 32-bit words.

(tea-encipher v w k)

function

DO:     Encipher the clear text vector V, storing the code in the
        vector W, using the key K.
V:      The clear text: a vector of two 32-bit words.
W:      The code: a vector of two 32-bit words.
K:      The key: a vector of four 32-bit words.