steffen: server/kolab-horde-framework/kolab-horde-framework/Cipher/Cipher/BlockMode cbc.php, NONE, 1.1 cfb64.php, NONE, 1.1 ecb.php, NONE, 1.1 ofb64.php, NONE, 1.1

cvs at intevation.de cvs at intevation.de
Fri Oct 14 16:33:05 CEST 2005


Author: steffen

Update of /kolabrepository/server/kolab-horde-framework/kolab-horde-framework/Cipher/Cipher/BlockMode
In directory doto:/tmp/cvs-serv28903/kolab-horde-framework/kolab-horde-framework/Cipher/Cipher/BlockMode

Added Files:
	cbc.php cfb64.php ecb.php ofb64.php 
Log Message:
Separated Horde Framework from kolab-resource-handlers

--- NEW FILE: cbc.php ---
<?php
/**
 * The Horde_Cipher_BlockMode_cbc:: This class implements the
 * Horde_Cipher_BlockMode using the Cipher Block Chaininng method of
 * encrypting blocks of data.
 *
 * $Horde: framework/Cipher/Cipher/BlockMode/cbc.php,v 1.7 2004/01/01 15:14:11 jan Exp $
 *
 * Copyright 2002-2004 Mike Cochrane <mike at graftonhall.co.nz>
 *
 * See the enclosed file COPYING for license information (LGPL). If you
 * did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
 *
 * @author  Mike Cochrane <mike at graftonhall.co.nz>
 * @version $Revision: 1.1 $
 * @since   Horde 2.2
 * @package Horde_Cipher
 */
class Horde_Cipher_BlockMode_cbc extends Horde_Cipher_BlockMode {

    function encrypt(&$cipher, $plaintext)
    {
        $encrypted = '';

        $blocksize = $cipher->getBlockSize();
        $previousCipher = $this->_iv;

        $jMax = strlen($plaintext);
        for ($j = 0; $j < $jMax; $j += $blocksize) {
            $plain = substr($plaintext, $j, $blocksize);

            if (strlen($plain) < $blocksize) {
                // pad the block with \0's if it's not long enough
                $plain = str_pad($plain, 8, "\0");
            }

            $plain = $plain ^ $previousCipher;
            $previousCipher = $cipher->encryptBlock($plain);
            $encrypted .= $previousCipher;
        }

        return $encrypted;
    }

    function decrypt(&$cipher, $ciphertext)
    {
        $decrypted = '';

        $blocksize = $cipher->getBlockSize();
        $previousCipher = $this->_iv;

        $jMax = strlen($ciphertext);
        for ($j = 0; $j < $jMax; $j += $blocksize) {
            $plain = substr($ciphertext, $j, $blocksize);
            $decrypted .= $cipher->decryptBlock($plain) ^ $previousCipher;
            $previousCipher = $plain;
        }

        // remove trailing \0's used to pad the last block
        while (substr($decrypted, -1, 1) == "\0") {
            $decrypted = substr($decrypted, 0, -1);
        }

        return $decrypted;
    }

}

--- NEW FILE: cfb64.php ---
<?php
/**
 * The Horde_Cipher_BlockMode_cfb64:: This class implements the
 * Horde_Cipher_BlockMode using a 64 bit cipher feedback. This can
 * used to encypt any length string and the encrypted version will be
 * the same length.
 *
 * $Horde: framework/Cipher/Cipher/BlockMode/cfb64.php,v 1.7 2004/01/01 15:14:11 jan Exp $
 *
 * Copyright 2002-2004 Mike Cochrane <mike at graftonhall.co.nz>
 *
 * See the enclosed file COPYING for license information (LGPL). If you
 * did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
 *
 * @author  Mike Cochrane <mike at graftonhall.co.nz>
 * @version $Revision: 1.1 $
 * @since   Horde 2.2
 * @package Horde_Cipher
 */
class Horde_Cipher_BlockMode_cfb64 extends Horde_Cipher_BlockMode {

    function encrypt(&$cipher, $plaintext)
    {
        $encrypted = '';

        $n = 0;
        $jMax = strlen($plaintext);
        for ($j = 0; $j < $jMax; $j++) {
            if ($n == 0) {
                $this->_iv = $cipher->encryptBlock($this->_iv);
            }

            $c = $plaintext[$j] ^ $this->_iv[$n];
            $this->_iv = substr($this->_iv, 0, $n) . $c . substr($this->_iv, $n + 1);
            $encrypted .= $c;

            $n = (++$n) & 0x07;
        }

        return $encrypted;
    }

    function decrypt(&$cipher, $ciphertext)
    {
        $decrypted = '';

        $n = 0;
        $jMax = strlen($ciphertext);
        for ($j = 0; $j < $jMax; $j++) {
            if ($n == 0) {
                $this->_iv = $cipher->encryptBlock($this->_iv);
            }

            $c = $ciphertext[$j] ^ $this->_iv[$n];
            $this->_iv = substr($this->_iv, 0, $n) . substr($ciphertext, $j, 1) . substr($this->_iv, $n + 1);
            $decrypted .= $c;

            $n = (++$n) & 0x07;
        }

        // remove trailing \0's used to pad the last block
        while (substr($decrypted, -1, 1) == "\0") {
            $decrypted = substr($decrypted, 0, -1);
        }

        return $decrypted;
    }

}

--- NEW FILE: ecb.php ---
<?php
/**
 * The Horde_Cipher_BlockMode_ecb:: This class implements the
 * Horde_Cipher_BlockMode using the Electronic Code Book method of
 * encrypting blocks of data.
 *
 * $Horde: framework/Cipher/Cipher/BlockMode/ecb.php,v 1.7 2004/01/01 15:14:11 jan Exp $
 *
 * Copyright 2002-2004 Mike Cochrane <mike at graftonhall.co.nz>
 *
 * See the enclosed file COPYING for license information (LGPL). If you
 * did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
 *
 * @author  Mike Cochrane <mike at graftonhall.co.nz>
 * @version $Revision: 1.1 $
 * @since   Horde 2.2
 * @package Horde_Cipher
 */
class Horde_Cipher_BlockMode_ecb extends Horde_Cipher_BlockMode {

    function encrypt(&$cipher, $plaintext)
    {
        $encrypted = '';
        $blocksize = $cipher->getBlockSize();

        $jMax = strlen($plaintext);
        for ($j = 0; $j < $jMax; $j += $blocksize) {
            $plain = substr($plaintext, $j, $blocksize);

            if (strlen($plain) < $blocksize) {
                // pad the block with \0's if it's not long enough
                $plain = str_pad($plain, 8, "\0");
            }

            $encrypted .= $cipher->encryptBlock($plain);
        }

        return $encrypted;
    }

    function decrypt(&$cipher, $ciphertext)
    {
        $decrypted = '';
        $blocksize = $cipher->getBlockSize();

        $jMax = strlen($ciphertext);
        for ($j = 0; $j < $jMax; $j += $blocksize) {
            $plain = substr($ciphertext, $j, $blocksize);
            $decrypted .= $cipher->decryptBlock($plain);
        }

        // remove trailing \0's used to pad the last block
        while (substr($decrypted, -1, 1) == "\0") {
            $decrypted = substr($decrypted, 0, -1);
        }

        return $decrypted;
    }

}

--- NEW FILE: ofb64.php ---
<?php
/**
 * The Horde_Cipher_BlockMode_ofb64:: This class implements the
 * Horde_Cipher_BlockMode using a 64 bit output feedback. This can
 * used to encypt any length string and the encrypted version will be
 * the same length.
 *
 * $Horde: framework/Cipher/Cipher/BlockMode/ofb64.php,v 1.7 2004/01/01 15:14:11 jan Exp $
 *
 * Copyright 2002-2004 Mike Cochrane <mike at graftonhall.co.nz>
 *
 * See the enclosed file COPYING for license information (LGPL). If you
 * did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
 *
 * @author  Mike Cochrane <mike at graftonhall.co.nz>
 * @version $Revision: 1.1 $
 * @since   Horde 2.2
 * @package Horde_Cipher
 */
class Horde_Cipher_BlockMode_ofb64 extends Horde_Cipher_BlockMode {

    function encrypt(&$cipher, $plaintext)
    {
        $encrypted = '';

        $n = 0;
        $jMax = strlen($plaintext);
        for ($j = 0; $j < $jMax; $j++) {
            if ($n == 0) {
                $this->_iv = $cipher->encryptBlock($this->_iv);
            }

            $c = $plaintext[$j] ^ $this->_iv[$n];
            $encrypted .= $c;

            $n = (++$n) & 0x07;
        }

        return $encrypted;
    }

    function decrypt(&$cipher, $ciphertext)
    {
        $decrypted = '';

        $n = 0;
        $jMax = strlen($ciphertext);
        for ($j = 0; $j < $jMax; $j++) {
            if ($n == 0) {
                $this->_iv = $cipher->encryptBlock($this->_iv);
            }

            $c = $ciphertext[$j] ^ $this->_iv[$n];
            $decrypted .= $c;

            $n = (++$n) & 0x07;
        }

        return $decrypted;
    }

}





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