Doc #71365 [NEW]: random_bytes(): missing Error causes; may return PRNG

From: salsi at icosaedro dot it Operating system: PHP version: 7.0.2 Package: Documentation problem Bug Type: Documentation Problem Bug description:random_bytes(): missing Error causes; may return PRNG Description: ------------ --- From manual page: http://www.php.net/function.random-bytes --- Examining the C source code, appears that the Error exception might be thrown also on failed reading from the source of randomness, or no enough entropy is available (whenever an estimation of the available entropy is available). It might worth to mention also that if not enough entropy data is available, some implementations (notably when reading from /dev/urandom as a last resort) may return values from a PRNG rather than from a CSPRNG, so partially defeating the purpose of this function for CS applications. The same holds for the companion random_int() function, which relies on the same base function as random_bytes(). Programmers should be advised that abusing of the entropy source may then compromise security, and those entropy sources should be used sparingly. -- Edit bug report at https://bugs.php.net/bug.php?id=71365&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=71365&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=71365&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=71365&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=71365&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=71365&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=71365&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=71365&r=needscript Try newer version: https://bugs.php.net/fix.php?id=71365&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=71365&r=support Expected behavior: https://bugs.php.net/fix.php?id=71365&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=71365&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=71365&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=71365&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=71365&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=71365&r=dst IIS Stability: https://bugs.php.net/fix.php?id=71365&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=71365&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=71365&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=71365&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=71365&r=mysqlcfg