KeyExpansion               Library Functions Manual                KeyExpansion

NAME

    KeyExpansion - Defines a key for the Extended EAES encryption algotithm.

SYNOPSIS

    #include "eaes.h"

    void KeyExpansion(unsigned char *key, int keyLength);

DESCRIPTION

    Set  the  encryption  key  to  be used for the Extended AES algorithm. This
    function  must  be  called  before  calling  either  the  Cipher()  or  the
    InvCipher()  functions.  The  key length must range from 128-bit (16 bytes)
    to  2048-bit  (256 bytes).  The  input  parameter  "key"  must point to the
    starting  byte  of  the key, and "keyLength" must receive the length of the
    key, in bytes.

    All  the  subsequent  calls to either the Cipher() or InvCipher() functions
    will use the key defined by this function.

    You  can  use  any  key size within the range, but the 128-bit, 192-bit and
    256-bit   key   sizes  are  the  only  ones  compliant  with  the  FIPS-197
    specification for the AES.

NOTES

    To  use  the  Extended EAES algorithm, you must include at your source code
    the following files:

        aestypes.cpp
        multresult.c
        eaes.cpp
        aestypes.h
        eaes.h

REFERENCES

    Cipher - Encrypts  a  block  of  data  using   the  Extended AES encryption
    algorithm. 

    InvCipher  -  Decrypts  a  block  of  ciphertext  using  the  Extended  AES
    encryption algorithm.

    FIPS-197 - The specification of the Federal Information Processing Standard
    for AES.

COPYRIGHT

    Copyright  (c)  2013  Dalen  Knowledge  Systems  under the terms of the GNU
    Lesser General Public License.

    This  program  is  free  software: you can redistribute it and/or modify it
    under  the  terms  of the GNU Lesser 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 Lesser General Public License
    for more details.

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

    The  authors of EAESCrypt disclaim any liability for any way out of the use
    of  this  software,  including  but  not  limited  to  loss of data, use or
    profits,  business  interruption, leakage of sensitive information, use for
    any  illicit  or illegal purposes, or even the usage not in accordance with
    the law.