Doc #75772 [NEW]: Incorrect limit specified on blowfish passwords

From: Thomas_Gnandt at gmx dot net Operating system: PHP version: Irrelevant Package: Documentation problem Bug Type: Documentation Problem Bug description:Incorrect limit specified on blowfish passwords Description: ------------ The documentation states "Using the PASSWORD_BCRYPT as the algorithm, will result in the password parameter being truncated to a maximum length of 72 characters." This is not true. The password is being truncated to a maximum length of 72 bytes. Since passwords should contain special characters, a lot of which are multi-byte, this should be clarified. This is incorrect both on the documentation for password_hash() as well as the documentation for crypt(). Test script: --------------- $pw = str_pad("", 71, 'a'); $salt = ['salt' => 'N9qo8uLOickgx2ZMRZoMye']; echo password_hash($pw . 'a', PASSWORD_DEFAULT, $salt ) . PHP_EOL; echo password_hash($pw . 'ä', PASSWORD_DEFAULT, $salt ) . PHP_EOL; echo password_hash($pw . 'ö', PASSWORD_DEFAULT, $salt ) . PHP_EOL; Expected result: ---------------- Three differnt hashes Actual result: -------------- $2y$10$N9qo8uLOickgx2ZMRZoMye5mlC/WoAmNnGP3YkHGchsBkco85S4ZC $2y$10$N9qo8uLOickgx2ZMRZoMyeWZPaNHNhngTN.zngPxYMmerH0ZknF7. $2y$10$N9qo8uLOickgx2ZMRZoMyeWZPaNHNhngTN.zngPxYMmerH0ZknF7. -- Edit bug report at https://bugs.php.net/bug.php?id=75772&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75772&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75772&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75772&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75772&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75772&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75772&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75772&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75772&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75772&r=support Expected behavior: https://bugs.php.net/fix.php?id=75772&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75772&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75772&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75772&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75772&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75772&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75772&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75772&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75772&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75772&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75772&r=mysqlcfg