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Bug #56611 Extension fails to load dictionaries on 64bit systems
Submitted: 2005-10-24 07:20 UTC Modified: 2008-07-17 06:14 UTC
From: skettler@php.net Assigned: skettler (profile)
Status: Closed Package: crack (PECL)
PHP Version: 5_1 CVS-2005-10-24 (dev) OS: Linux
Private report: No CVE-ID: None
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 [2005-10-24 07:20 UTC] skettler@php.net 
Description:
------------
Tere is a 32/64 bit size problem on AMD 64 systems.

The version of cracklib bundled in the pecl package improperly defines the following types in libcrack/src/cracklib.h:47:

typedef unsigned char int8;
typedef unsigned short int int16;
typedef unsigned long int32;

This results in int32 being 64 bits on an x86-64 machine because longs are 8 bytes long.  I changed this to:

typedef unsigned char int8;
typedef unsigned short int int16;
typedef unsigned int int32;

So that int32 is now actually 32 bits long.

It looks like the upstream version of crack does not suffer from these problems; it contains the following, which would work as well:

typedef u_int8_t int8;
typedef u_int16_t int16;
typedef u_int32_t int32;

Which are defined in sys/types.h.

I came across this problem becuase the pecl version of crack could not read the magic number at the beginning of the dictionary that I had created with the Debian version of crack_mkdict (I kept on receiving "magic mismatch" errors).

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2005-10-31 17:02 UTC] skettler@php.net 
Fixed in current CVS, but additional cross-platform tests needed before releasing new version.
 [2006-08-04 14:38 UTC] gersonsm at gmail dot com 
Must copy libcrack/src/packlib.c together.
 [2006-08-11 00:22 UTC] james at advmm dot com 
Same issue experienced on Intel x86_64 system (running FC5).
Fixed as above by replacing:

typedef unsigned long int int32;

with:

typedef unsigned int int32;

in libcrack/src/cracklib.h, before installing extension (installed manually - '# pecl install crack' failed).
 
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