Bug #78208 [Opn->Ver]: password_needs_rehash() returns false for password hashed with a different algo

Edit report at https://bugs.php.net/bug.php?id=78208&edit=1 ID: 78208 Updated by: daverandom@php.net Reported by: thomas dot gerbet at enalean dot com Summary: password_needs_rehash() returns false for password hashed with a different algo -Status: Open +Status: Verified Type: Bug Package: *Encryption and hash functions PHP Version: 7.4.0alpha1 Block user comment: N Private report: N New Comment: Confirmed different behaviour between 7.3 and 7.4 https://3v4l.org/njXjM Previous Comments: ------------------------------------------------------------------------ [2019-06-25 16:11:24] thomas dot gerbet at enalean dot com 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 this bug report at https://bugs.php.net/bug.php?id=78208&edit=1