#36937 [Opn]: key length too long distroys the hash

ID: 36937 User updated by: dragos at codersnest dot com Reported By: dragos at codersnest dot com Status: Open Bug Type: mhash related Operating System: Suse 9.3 + Windoze XP PHP Version: 4.4.2 New Comment: same thing hapenned on windowsXP+php 5.1.2 and on Fedora3+php 4.3.11, even with iconCube and ZendOptimizer disabled Previous Comments: ------------------------------------------------------------------------ [2006-03-31 20:35:07] dragos at codersnest dot com Description: ------------ I tried to do a gateway script which required me to send a hash(SHA1) of some given data, with a given key. In the beginning it worked, then after we switched to production, the key changed length from 32 to 194 (hex chars). The key was calculated as pack() binary value from the original key. At this point, the value returned by mhash() got wrong. So, basically, I am assuming that there is somewhere a constraint on the key length, either on pack() there might be a problem, though i've used that one before. Reproduce code: --------------- example 1 (working): $data = 'some string data'; $mkey = '00112233445566778899AABBCCDDEEFF'; $mac = bin2hex(mhash(MHASH_SHA1,$mac,pack('h*',$mkey))); This was working! example 2: $mkey='496E7465726E6574206765626F72656E2C20656E747769636B656C7420756E6420756D67657365747A742E20656E7465727061796D656E74206661737374206469652067846E6769677374656E205A61686C617274656E20696E2065696E656D20'; This was not workign anymore! Expected result: ---------------- a correct hash value which to be checked at the gateway again by calculating the same hash from fields of a form.. Actual result: -------------- bad hash value ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=36937&edit=1