#46010 [Opn->Csd]: warnings incorrectly generated for iv in ecb mode

ID: 46010 Updated by: felipe@php.net Reported By: d_kelsey at uk dot ibm dot com -Status: Open +Status: Closed Bug Type: mcrypt related Operating System: Windows XP PHP Version: 5.2.6 New Comment: This bug has been fixed in CVS. 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/. Thank you for the report, and for helping us make PHP better. Previous Comments: ------------------------------------------------------------------------ [2008-09-06 15:36:45] d_kelsey at uk dot ibm dot com Description: ------------ With the functions mcrypt_encrypt, mcrypt_decrypt with MCRYPT_MODE_ECB and mcrypt_ecb, by not providing an initial vector or providing one that isn't at the correct block size results in a warning being generated. ECB mode never uses the initial vector, so a warning is irrelevant. Reproduce code: --------------- <?php // the same type of results can also be seen with mcrypt_ecb, mcrypt_decrypt var_dump(bin2hex(mcrypt_encrypt(MCRYPT_TRIPLEDES, "key", "data", MCRYPT_MODE_ECB))); var_dump(bin2hex(mcrypt_encrypt(MCRYPT_TRIPLEDES, "key", "data", MCRYPT_MODE_ECB, "a"))); var_dump(bin2hex(mcrypt_encrypt(MCRYPT_TRIPLEDES, "key", "data", MCRYPT_MODE_ECB, "12345678"))); ?> Expected result: ---------------- string(16) "372eeb4a524b8d31" string(16) "372eeb4a524b8d31" string(16) "372eeb4a524b8d31" Actual result: -------------- Warning: mcrypt_encrypt(): Attempt to use an empty IV, which is NOT recommend in C:\udata-eclipse\p8\a.phpcode\mcrypt_ecb.php on line 2 string(16) "372eeb4a524b8d31" Warning: mcrypt_encrypt(): The IV parameter must be as long as the blocksize in C:\udata-eclipse\p8\a.phpcode\mcrypt_ecb.php on line 3 string(16) "372eeb4a524b8d31" string(16) "372eeb4a524b8d31" ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=46010&edit=1