#22316 [Asn->Csd]: Crypt_RC4 destroys its sbox.
| From: | arnaud@php.net | Date: | Sun, 27 Jul 2003 10:46:56 +0000 |
| Subject: | #22316 [Asn->Csd]: Crypt_RC4 destroys its sbox. | ||
| References: | 1 | Groups: | php.pear.dev |
| Request: | Send a blank email to pear-dev+get-18777@lists.php.net to get a copy of this message | ||
ID: 22316
Updated by: arnaud@php.net
Reported By: mike at graftonhall dot co dot nz
-Status: Assigned
+Status: Closed
Bug Type: PEAR related
Operating System: Windows 2000
PHP Version: 4CVS-2003-02-19 (stable)
Assigned To: zyprexia
New Comment:
This bug has been fixed in CVS.
In case this was a PHP problem, snapshots of the sources are packaged
every three hours; this change will be in the next snapshot. You can
grab the snapshot at http://snaps.php.net/.
In case this was a documentation problem, the fix will show up soon at
http://www.php.net/manual/.
In case this was a PHP.net website problem, the change will show
up on the PHP.net site and on the mirror sites in short time.
Thank you for the report, and for helping us make PHP better.
Previous Comments:
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[2003-02-19 22:52:07] mike at graftonhall dot co dot nz
The Crypt_RC4::crypt() routine (and Crypt_RC4::decrypt()) destroys the
sbox created in Crypt_RC4::key() causes the example code to no work.
So the code in the comment:
Usage:
$key = "pear";
$message = "PEAR rulez!";
$rc4 = new RC4;
$rc4->key($key);
echo "Original message: $message <br>\n";
$rc4->crypt($message);
echo "Encrypted message: $message <br>\n";
$rc4->decrypt($message);
echo "Decrypted message: $message <br>\n";
Does not work. For two reasons, first the class is nor Crypt_RC4 and
second after crypt() has been called the sbox has been modified and so
neither crypt nor decrypt will work correctly.
The example code should currently read:
Usage:
$key = "pear";
$message = "PEAR rulez!";
$rc4 = new Crypt_RC4;
$rc4->key($key);
echo "Original message: $message <br>\n";
$rc4->crypt($message);
echo "Encrypted message: $message <br>\n";
$rc4->key($key);
$rc4->decrypt($message);
echo "Decrypted message: $message <br>\n";
Note the extra key() call.
- Mike :-)
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Edit this bug report at http://bugs.php.net/?id=22316&edit=1