Edit report at http://bugs.php.net/bug.php?id=52801&edit=1
ID: 52801
Comment by: matvey at copters dot ru
Reported by: matvey at copters dot ru
Summary: getimageblob() on Imagick object from tiff file
produces random md5 hashes
Status: Bogus
Type: Bug
Package: *Graphics related
Operating System: Linux Debian Lenny 64
PHP Version: 5.2SVN-2010-09-08 (SVN)
Block user comment: N
New Comment:
r...@cp ~/src $ cat f.php
<?php
$s = array(
1,
2,
3,
4,
5,
6,
7,
8,
9,
10,
);
foreach ($s as $t) {
$hash = hash_file('md5', "test.tif");
echo "{$hash} \n";
}
?>
r...@cp ~/src $ php -f f.php
be42c81505f2c9ef70994c60915a3f12
be42c81505f2c9ef70994c60915a3f12
be42c81505f2c9ef70994c60915a3f12
be42c81505f2c9ef70994c60915a3f12
be42c81505f2c9ef70994c60915a3f12
be42c81505f2c9ef70994c60915a3f12
be42c81505f2c9ef70994c60915a3f12
be42c81505f2c9ef70994c60915a3f12
be42c81505f2c9ef70994c60915a3f12
be42c81505f2c9ef70994c60915a3f12
Previous Comments:
------------------------------------------------------------------------
[2010-09-09 01:22:18] matvey at copters dot ru
Ok, but why on earth the same file.tiff hash_file('md5', 'file.tiff');
produces
constant values?
Thanx for the tip.
------------------------------------------------------------------------
[2010-09-09 01:00:55] [email protected]
Report bugs about pecl's package to pecl please.
Tip: float are not an exact science and tiff can use floats.
------------------------------------------------------------------------
[2010-09-09 00:31:58] matvey at copters dot ru
r...@cp ~/src $ cat s.php
<?php
$s = array(
1,
2,
3,
4,
5,
6,
7,
8,
9,
10,
);
foreach ($s as $t) {
$ob = new Imagick("test.tif");
$hash = hash('md5', $ob->getimageblob());
echo "{$hash} \n";
}
?>
r...@cp ~/src $ php -f s.php
3a0eff2dc635064f91f9720e4f02fc25
0e15adc163724345c26305df4cb2faed
0e15adc163724345c26305df4cb2faed
a6577644313c4fbd5014028c16a78e84
dd391a6977cc7a6af56037959d607c90
dd391a6977cc7a6af56037959d607c90
83caff49e5d8abe704cf8c298770314f
e85136bd4259b4b18e8f0bbc9867da9b
36bdf4fc1806f83040b71a7214cc1d4c
491f7bc84db9b83602f9d5ebc13f530a
------------------------------------------------------------------------
[2010-09-09 00:20:31] matvey at copters dot ru
Description:
------------
$this->insecure = new Imagick("file.tiff");
$this->originalhash = hash('md5', $this->insecure->getimageblob());
$this->originalhash is always different, but file.tiff is always the
same.
Test script:
---------------
$ob = new Imagick("file.tiff");
$hash = hash('md5', $ob->getimageblob());
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=52801&edit=1
