From: Operating system: Windows XP PHP version: 5.3.3 Package: mcrypt related Bug Type: Bug Bug description:mcrypt_create_iv not reliable on win: "Could not gather sufficient random data"
Description: ------------ mcrypt_create_iv (or likely rather the underlying function php_win32_get_random_bytes) is not reliable on Windows with MCRYPT_DEV_RANDOM/MCRYPT_DEV_URANDOM. Since 5.3.0 MCRYPT_DEV_RANDOM and MCRYPT_DEV_URANDOM became available on Windows platforms. (http://php.net/mcrypt_create_iv) MCRYPT_RAND will still works, as with PHP prior to 5.3.0. Test script: --------------- The following code should loop forever, but does not do so on Windows (XP and Windows 7): php -r "$i=0; while( mcrypt_create_iv(16) !== false ) {echo ($i++).'.';};" Expected result: ---------------- Infinite loop. Actual result: -------------- 0.1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17. Fatal error: mcrypt_create_iv(): Could not gather sufficient random data in Command line code on line 1 -- Edit bug report at http://bugs.php.net/bug.php?id=52523&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=52523&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=52523&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=52523&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=52523&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=52523&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=52523&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=52523&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=52523&r=needscript Try newer version: http://bugs.php.net/fix.php?id=52523&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=52523&r=support Expected behavior: http://bugs.php.net/fix.php?id=52523&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=52523&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=52523&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=52523&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=52523&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=52523&r=dst IIS Stability: http://bugs.php.net/fix.php?id=52523&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=52523&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=52523&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=52523&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=52523&r=mysqlcfg
