#32432 [NEW]: crc32() sometimes gives different values than other CRC32 engines

From: alex at primafila dot net Operating system: Linux, Darwin PHP version: 4.3.10 PHP Bug Type: *Encryption and hash functions Bug description: crc32() sometimes gives different values than other CRC32 engines Description: ------------ While comparing crc32()'s output with other languages' CRC32 functions I note that sometimes the result is different. Unfortunately all other engines, such as Perl Digest::Crc32, String::CRC32, Archive::Zip, give always the same value. I wasn't able to understand which format leds to this misbehaving, and I also tried to run crc32() of failing strings' MD5 hashes: the result is different. Reproduce code: --------------- #This works: php -r "echo crc32('htmlhptaccuin');" 121189226 perl -MString::CRC32 -e 'print crc32("htmlhptaccuin")' 121189226 #This doesn't: php -r "echo crc32('html:hp_taccuino');" -1565398511 perl -MString::CRC32 -e 'print crc32("html:hp_taccuino")' 2729568785 Expected result: ---------------- I expect to have the same CRC32 hash everywhere, so I expect to get 2729568785 in the above example. -- Edit bug report at http://bugs.php.net/?id=32432&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=32432&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=32432&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=32432&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=32432&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=32432&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=32432&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=32432&r=needscript Try newer version: http://bugs.php.net/fix.php?id=32432&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=32432&r=support Expected behavior: http://bugs.php.net/fix.php?id=32432&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=32432&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=32432&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=32432&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=32432&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=32432&r=dst IIS Stability: http://bugs.php.net/fix.php?id=32432&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=32432&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=32432&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=32432&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=32432&r=mysqlcfg