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Bug #59439 [PATCH] incorrect header length for date fields
Submitted: 2010-09-28 08:49 UTC Modified: 2010-10-11 02:22 UTC
From: kp at kll dot pl Assigned:
Status: Closed Package: dbase (PECL)
PHP Version: 5.3.2 OS: CentOS
Private report: No CVE-ID: None
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From: kp at kll dot pl
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 [2010-09-28 08:49 UTC] kp at kll dot pl 
Description:
------------
created dbf has in header 0 as value of length for fileds types date and bool.

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 [2010-09-28 08:51 UTC] kp at kll dot pl 
patch:

--- dbf_head.c.original 2010-09-28 12:46:04.000000000 +0200
+++ dbf_head.c  2010-09-28 12:46:15.000000000 +0200
@@ -200,9 +200,11 @@
                break;
            case 'D':
                dbf->db_flen = 8;
+               put_short(dbfield.dbf_flen, dbf->db_flen);
                break;
            case 'L':
                dbf->db_flen = 1;
+               put_short(dbfield.dbf_flen, dbf->db_flen);
                break;
            default:
                put_short(dbfield.dbf_flen, dbf->db_flen);
 [2010-09-28 09:07 UTC] kp at kll dot pl 
Some DBF tools report created file as corrupted.

Solution is to modify 
file: dbf_head.c
function:  get_dbf_field

before:
-------------------------------
        switch (dbf->db_type) {
            case 'N':
            case 'F':
                        dbf->db_flen = dbfield.dbf_flen[0];
                        dbf->db_fdc = dbfield.dbf_flen[1];
                        break;
            case 'L':
                        dbf->db_flen = 1;
                        break;
            case 'D':
                        dbf->db_flen = 8;
                        break;
            default:
                dbf->db_flen = get_short(dbfield.dbf_flen);
                        break;
        }
-------------------------------

after patch:
-------------------------------
        switch (dbf->db_type) {
            case 'N':
                dbfield.dbf_flen[0] = dbf->db_flen;
                dbfield.dbf_flen[1] = dbf->db_fdc;
                break;
            case 'D':
                dbf->db_flen = 8;
                put_short(dbfield.dbf_flen, dbf->db_flen);
                break;
            case 'L':
                dbf->db_flen = 1;
                put_short(dbfield.dbf_flen, dbf->db_flen);
                break;
            default:
                put_short(dbfield.dbf_flen, dbf->db_flen);
        }
-------------------------------
 [2010-09-28 09:17 UTC] kp at kll dot pl 
sorry for above, correct function is: put_dbf_field
and...

before patch:
-------------------------------
       switch (dbf->db_type) {
            case 'N':
                dbfield.dbf_flen[0] = dbf->db_flen;
                dbfield.dbf_flen[1] = dbf->db_fdc;
                break;
            case 'D':
                dbf->db_flen = 8;
                break;
            case 'L':
                dbf->db_flen = 1;
                break;
            default:
                put_short(dbfield.dbf_flen, dbf->db_flen);
        }
-------------------------------


after patch should be:
-------------------------------
        switch (dbf->db_type) {
            case 'N':
                dbfield.dbf_flen[0] = dbf->db_flen;
                dbfield.dbf_flen[1] = dbf->db_fdc;
                break;
            case 'D':
                dbf->db_flen = 8;
                put_short(dbfield.dbf_flen, dbf->db_flen);
                break;
            case 'L':
                dbf->db_flen = 1;
                put_short(dbfield.dbf_flen, dbf->db_flen);
                break;
            default:
                put_short(dbfield.dbf_flen, dbf->db_flen);
        }
-------------------------------
 [2010-09-28 10:38 UTC] alan at akbkhome dot com 
Thanks, I'll try and commit it in a few days.
 [2010-09-28 11:33 UTC] kp at kll dot pl 
Great, waiting...

It was tested on production server.

In Clipper some RDD like NTX discard this header value but some like ADS relay on it and report corrputed file.

Some other tools may relay on it too.
 [2010-10-11 02:22 UTC] alan at akbkhome dot com 
Thank you for your bug report. This issue has been fixed
in the latest released version of the package, which you can download at
http://pecl.php.net/get/dbase
 
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