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OLE: Feature/Change Request 28646 [Open] allow using a strem for writing output
http://pear.php.net/bugs/28646
OLE Feature/Change Request
Reported by gggeek
2024-07-26T12:37:20+00:00
PHP: 8.0.0 (Specify exact version in description) OS: linux Package Version: 1.0.0RC3
Description:
------------
In `Root::save()`, we could allow the caller to pass in an already open stream. This would allow to save f.e. to a memory stream, without the need for temp files]]>OLE Feature/Change Request
Reported by gggeek
2024-07-26T12:37:20+00:00
PHP: 8.0.0 (Specify exact version in description) OS: linux Package Version: 1.0.0RC3
Description:
------------
In `Root::save()`, we could allow the caller to pass in an already open stream. This would allow to save f.e. to a memory stream, without the need for temp files]]>2024-07-26T12:37:20+00:00giunta dot gaetano at gmail dot comOLE Feature/Change RequestOLE: Bug 21243 [Open] small blocks ("mini stream") handling is broken
http://pear.php.net/bugs/21243
OLE Bug
Reported by tacituseu
2017-09-26T15:12:16+00:00
PHP: Irrelevant OS: Any Package Version: 1.0.0RC3
Description:
------------
In OLE\ChainedBlockStream.php::stream_open() there is this:
if (isset($this->params['size']) && $this->params['size'] < $this->ole-
>bigBlockThreshold && $blockId != $this->ole->root->startBlock) {
// Block id refers to small blocks
$rootPos = $this->ole->_getBlockOffset($this->ole->root-
>startBlock);
while ($blockId != -2) {
$pos = $rootPos + $blockId * $this->ole-
>bigBlockSize;
$blockId = $this->ole->sbat[$blockId];
fseek($this->ole->_file_handle, $pos);
$this->data .= fread($this->ole->_file_handle,
$this->ole->bigBlockSize);
}
}
Problems:
1. small blocks ([MS-CFB].pdf: "mini stream") isn't a continuous space,
but a stream itself:
$rootPos = $this->ole->_getBlockOffset($this->ole->root->startBlock);
will work only for simple documents that don't contain entries with size
larger than $this->ole->bigBlockThreshold
what you want is in OLE.php::_readPpsWks():
$this->_list[] = $pps;
if ($type == OLE_PPS_TYPE_ROOT) {
$this->_small_handle = $this->getStream($pps->startBlock);
}
and then use it in point 2
Reference: [MS-CFB].pdf 2.6.1 Root Directory Entry
2. wrong block size used for fread
fread($this->ole->_file_handle, $this->ole->bigBlockSize);
should be:
fread($this->ole->_small_handle, $this->ole->smallBlockSize);
Test script:
---------------
$obj = new OLE();
$obj->read('ole.xls');
foreach ($obj->_list as $idx => $pps) if ($obj->isFile($idx)) {
$dlen = $olz->getDataLength($idx);
$data = $olz->getData($idx, 0, $dlen);
var_dump($data);
}
Expected result:
----------------
data corresponding to given entry
Actual result:
--------------
data corresponding to given entry for some entries (up to first big block entry
which breaks assumption of continuity for small stream)]]>OLE Bug
Reported by tacituseu
2017-09-26T15:12:16+00:00
PHP: Irrelevant OS: Any Package Version: 1.0.0RC3
Description:
------------
In OLE\ChainedBlockStream.php::stream_open() there is this:
if (isset($this->params['size']) && $this->params['size'] < $this->ole-
>bigBlockThreshold && $blockId != $this->ole->root->startBlock) {
// Block id refers to small blocks
$rootPos = $this->ole->_getBlockOffset($this->ole->root-
>startBlock);
while ($blockId != -2) {
$pos = $rootPos + $blockId * $this->ole-
>bigBlockSize;
$blockId = $this->ole->sbat[$blockId];
fseek($this->ole->_file_handle, $pos);
$this->data .= fread($this->ole->_file_handle,
$this->ole->bigBlockSize);
}
}
Problems:
1. small blocks ([MS-CFB].pdf: "mini stream") isn't a continuous space,
but a stream itself:
$rootPos = $this->ole->_getBlockOffset($this->ole->root->startBlock);
will work only for simple documents that don't contain entries with size
larger than $this->ole->bigBlockThreshold
what you want is in OLE.php::_readPpsWks():
$this->_list[] = $pps;
if ($type == OLE_PPS_TYPE_ROOT) {
$this->_small_handle = $this->getStream($pps->startBlock);
}
and then use it in point 2
Reference: [MS-CFB].pdf 2.6.1 Root Directory Entry
2. wrong block size used for fread
fread($this->ole->_file_handle, $this->ole->bigBlockSize);
should be:
fread($this->ole->_small_handle, $this->ole->smallBlockSize);
Test script:
---------------
$obj = new OLE();
$obj->read('ole.xls');
foreach ($obj->_list as $idx => $pps) if ($obj->isFile($idx)) {
$dlen = $olz->getDataLength($idx);
$data = $olz->getData($idx, 0, $dlen);
var_dump($data);
}
Expected result:
----------------
data corresponding to given entry
Actual result:
--------------
data corresponding to given entry for some entries (up to first big block entry
which breaks assumption of continuity for small stream)]]>2018-10-23T09:16:24+00:00tacituseu at gmail dot comOLE BugOLE: Bug 21175 [Open] Corrupt OLE header generated for files approximately 7mb in size.
http://pear.php.net/bugs/21175
OLE Bug
Reported by obarshay
2017-02-02T08:01:22+00:00
PHP: Irrelevant OS: Package Version: 1.0.0RC2
Description:
------------
When the total number of block pointers is 109 (the number that can fit
in the header), an extension block pointer is added to the header. To fix,
make the following change to Root.php:259
if ($iBdCnt < $i1stBdL) {
to:
if ($iBdCnt <= $i1stBdL) {]]>OLE Bug
Reported by obarshay
2017-02-02T08:01:22+00:00
PHP: Irrelevant OS: Package Version: 1.0.0RC2
Description:
------------
When the total number of block pointers is 109 (the number that can fit
in the header), an extension block pointer is added to the header. To fix,
make the following change to Root.php:259
if ($iBdCnt < $i1stBdL) {
to:
if ($iBdCnt <= $i1stBdL) {]]>2018-10-31T06:11:02+00:00oleg at barshaysoftware dot comOLE Bug