Bug #78208 [NEW]: password_needs_rehash() returns false for password hashed with a different algo

From: thomas dot gerbet at enalean dot com Operating system: PHP version: 7.4.0alpha1 Package: *Encryption and hash functions Bug Type: Bug Bug description:password_needs_rehash() returns false for password hashed with a different algo Description: ------------ password hashed using crypt() with a different algorithm than the one chosen for password_needs_rehash() are not considered as needing to be rehashed. This behaviour is different than the one of PHP 7.1 to PHP 7.3. Test script: --------------- <?php var_dump(password_needs_rehash(crypt('Example', '$1$'), PASSWORD_DEFAULT)); // CRYPT_MD5 var_dump(password_needs_rehash(crypt('Example', '$6$rounds=5000$aa$'), PASSWORD_DEFAULT)); // CRYPT_SHA512 with 5000 rounds Expected result: ---------------- bool(true) bool(true) Actual result: -------------- bool(false) bool(false) -- Edit bug report at https://bugs.php.net/bug.php?id=78208&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=78208&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=78208&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=78208&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=78208&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=78208&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=78208&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=78208&r=needscript Try newer version: https://bugs.php.net/fix.php?id=78208&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=78208&r=support Expected behavior: https://bugs.php.net/fix.php?id=78208&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=78208&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=78208&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=78208&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=78208&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=78208&r=dst IIS Stability: https://bugs.php.net/fix.php?id=78208&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=78208&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=78208&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=78208&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=78208&r=mysqlcfg