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[2009-07-01 23:48 UTC] dani dot church at gmail dot com
Description:
------------
When PHP writes a .od* file using ZipArchive, the resulting archive cannot be opened by OpenOffice.org. The error it gives is "The file 'filename' is corrupt and therefore cannot be opened. Should OpenOffice.org repair the file?"
Repairing the file in OO.o does not work. However, unzipping the file from the command line (using unzip in OSX) works without error, and unzip -t (test integrity) reports no errors. Furthermore, the extracted files are byte-correct, and zipping the extracted files into a new .od* file results in a valid OpenOffice.org file.
This bug is a regression since 5.2.6. Using zip.so from 5.2.6 results in a valid file. Using zip.so from 5.2CVS-2009-07-01 results in a corrupt file.
Reproduce code:
---------------
<?php
if (isset($_FILES['od'])) {
$odfile = $_FILES['od']['tmp_name'];
$zip = new ZipArchive();
$zip->open($odfile);
$xml = $zip->getFromName('content.xml');
$zip->addFromString('content.xml', $xml);
$zip->close();
header('content-type: application/vnd.oasis.opendocument.spreadsheet');
header('content-disposition: attachment;filename=test.ods');
readfile($odfile);
unlink($odfile);
return;
}
?>
<form method="POST" enctype="multipart/form-data">
<input type='file' name='od'
<input type='submit'>
</form>
Expected result:
----------------
Using the above testbed (for ODS spreadsheets) to update content.xml with its own data should result in a valid ODS spreadsheet.
Actual result:
--------------
The resulting spreadsheet is corrupt and cannot be opened.
PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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Last updated: Thu Nov 21 09:01:32 2024 UTC |
I sampled the compressed file using statName() three times: once before updating it, once after the addFromString() call, and once after closing the ZIP and reopening it from another object. The results: Original file: Array ( [name] => content.xml [index] => 11 [crc] => 2790848447 [size] => 16096 [mtime] => 1246486396 [comp_size] => 2379 [comp_method] => 8 ) Compressed, not saved: Array ( [name] => content.xml [index] => 20 [crc] => 0 [size] => 16096 [mtime] => 1246493476 [comp_size] => -1 [comp_method] => 0 ) Compressed and reopened: Array ( [name] => content.xml [index] => 19 [crc] => 2790848447 [size] => 16096 [mtime] => 1246493476 [comp_size] => 2355 [comp_method] => 8 ) Notably, the compression method is the same, which means that PHP is not trying to use a compression method that OpenOffice.org does not support.Here's a binary diff of the two zip files. Summary: 5 places where an 0x08 byte changed to 0x00, and two places where an 0x06 byte changed to 0x44. Given the values of comp_method in the stat calls, my wild guess is that comp_method somehow does not get stored properly in 5.2.8+. I don't know the code, though. If necessary, I can host the original files on my server for download. --- empty-5.2.6.xxd 2009-07-02 18:27:28.000000000 -0400 +++ empty-5.2CVS2009-07-01.xxd 2009-07-02 18:27:28.000000000 -0400 @@ -7,7 +7,7 @@ 0000060: e23a 0000 0000 0000 0000 0000 0000 1a00 .:.............. 0000070: 0000 436f 6e66 6967 7572 6174 696f 6e73 ..Configurations 0000080: 322f 7374 6174 7573 6261 722f 504b 0304 2/statusbar/PK.. -0000090: 1400 0808 0800 00b3 e23a 0000 0000 0200 .........:...... +0000090: 1400 0008 0800 00b3 e23a 0000 0000 0200 .........:...... 00000a0: 0000 0000 0000 2700 0000 436f 6e66 6967 ......'...Config 00000b0: 7572 6174 696f 6e73 322f 6163 6365 6c65 urations2/accele 00000c0: 7261 746f 722f 6375 7272 656e 742e 786d rator/current.xm @@ -32,7 +32,7 @@ 00001f0: 0000 b3e2 3a00 0000 0000 0000 0000 0000 ....:........... 0000200: 001f 0000 0043 6f6e 6669 6775 7261 7469 .....Configurati 0000210: 6f6e 7332 2f69 6d61 6765 732f 4269 746d ons2/images/Bitm -0000220: 6170 732f 504b 0304 1400 0808 0800 00b3 aps/PK.......... +0000220: 6170 732f 504b 0304 1400 0008 0800 00b3 aps/PK.......... 0000230: e23a 8d6c f030 aa05 0000 3619 0000 0a00 .:.l.0....6..... 0000240: 0000 7374 796c 6573 2e78 6d6c dd59 6d6f ..styles.xml.Ymo 0000250: db36 10fe be5f 2128 43b1 0293 253b 6913 .6..._!(C...%;i. @@ -171,7 +171,7 @@ 0000aa0: 6765 6e65 7261 746f 723e 3c2f 6f66 6669 generator></offi 0000ab0: 6365 3a6d 6574 613e 3c2f 6f66 6669 6365 ce:meta></office 0000ac0: 3a64 6f63 756d 656e 742d 6d65 7461 3e50 :document-meta>P -0000ad0: 4b03 0414 0008 0808 0000 b3e2 3a70 6c4c K...........:plL +0000ad0: 4b03 0414 0000 0808 0000 b3e2 3a70 6c4c K...........:plL 0000ae0: 647b 0000 00f8 0200 0018 0000 0054 6875 d{...........Thu 0000af0: 6d62 6e61 696c 732f 7468 756d 626e 6169 mbnails/thumbnai 0000b00: 6c2e 706e 67eb 0cf0 73e7 e592 e262 6060 l.png...s....b`` @@ -182,7 +182,7 @@ 0000b50: c112 c939 26cd 93d3 0a2e f1f8 cd3a e869 ...9&........:.i 0000b60: 6c91 392a 382a 38e0 82b7 582f 7e64 fb77 l.9*8*8...X/~d.w 0000b70: 4d82 b51b 94a2 3d5d fd5c d639 2534 0100 M.....=].\.9%4.. -0000b80: 504b 0304 1400 0808 0800 00b3 e23a 2124 PK...........:!$ +0000b80: 504b 0304 1400 0008 0800 00b3 e23a 2124 PK...........:!$ 0000b90: 3734 8e03 0000 e01b 0000 0c00 0000 7365 74............se 0000ba0: 7474 696e 6773 2e78 6d6c ed99 5153 e230 ttings.xml..QS.0 0000bb0: 10c7 dfef 5330 7dc7 0272 dcd9 111c c4f1 ....S0}..r...... @@ -241,7 +241,7 @@ 0000f00: 5f4d 10f6 19d3 c536 8aa2 9f38 1910 ee00 _M.....6...8.... 0000f10: aba0 e022 7147 ba1a 2267 cb0a fc34 9467 ..."qG.."g...4.g 0000f20: ab0f 51b6 0eb2 e24c f086 89c2 d3a5 f9ea ..Q....L........ -0000f30: 2394 59f4 79ae f71f 504b 0304 1400 0808 #.Y.y...PK...... +0000f30: 2394 59f4 79ae f71f 504b 0304 1400 0008 #.Y.y...PK...... 0000f40: 0800 00b3 e23a 4154 fb43 4901 0000 6807 .....:AT.CI...h. 0000f50: 0000 1500 0000 4d45 5441 2d49 4e46 2f6d ......META-INF/m 0000f60: 616e 6966 6573 742e 786d 6cb5 9541 6ec3 anifest.xml..An. @@ -265,7 +265,7 @@ 0001080: 7bf5 2e3c f9f9 7fcd fc3b 97f8 6490 66c7 {..<.....;..d.f. 0001090: 0ec8 30db c1b3 ddc7 6167 411b 927c 1956 ..0.....agA..|.V 00010a0: def6 73c3 e72d 2c32 a7eb f25a da95 fc71 ..s..-,2...Z...q -00010b0: 5bae 3f01 504b 0304 1400 0000 0800 0693 [.?.PK.......... +00010b0: 5bae 3f01 504b 0304 1400 0000 0800 4493 [.?.PK........D. 00010c0: e23a 75e5 4403 7003 0000 6f0e 0000 0b00 .:u.D.p...o..... 00010d0: 0000 636f 6e74 656e 742e 786d 6ce5 574d ..content.xml.WM 00010e0: 8fdb 3610 bde7 5718 2ad0 1bcd b5b7 4176 ..6...W.*.....Av @@ -382,7 +382,7 @@ 00017d0: 54fb 4349 0100 0068 0700 0015 0000 0000 T.CI...h........ 00017e0: 0000 0000 0000 0000 0038 0f00 004d 4554 .........8...MET 00017f0: 412d 494e 462f 6d61 6e69 6665 7374 2e78 A-INF/manifest.x -0001800: 6d6c 504b 0102 0000 1400 0000 0800 0693 mlPK............ +0001800: 6d6c 504b 0102 0000 1400 0000 0800 4493 mlPK..........D. 0001810: e23a 75e5 4403 7003 0000 6f0e 0000 0b00 .:u.D.p...o..... 0001820: 0000 0000 0000 0000 0000 0000 b410 0000 ................ 0001830: 636f 6e74 656e 742e 786d 6c50 4b05 0600 content.xmlPK...You're absolutely right, that's the file with the bug. Both PHP 5.2.6 and 5.2.8+ produce malformed ZIP files, in slightly different ways, though only when UPDATING (not creating from scratch) ZIP files. The zip library does not write optional data descriptors, even if the input file has them. In 5.2.6, the "data descriptor exists" flag is set, even though there is no data descriptor. In 5.2.8+, the flag is (properly) cleared in the local file header, but not in the central directory. OpenOffice.org tolerates the bug in 5.2.6 but not the one in 5.2.8+. A patch to fix this bug (and another minor bug I found in the same area) follows: --- ext/zip/lib/zip_close.c.orig 2009-07-02 21:40:03.000000000 -0400 +++ ext/zip/lib/zip_close.c 2009-07-02 22:24:54.000000000 -0400 @@ -175,6 +175,7 @@ de.filename = strdup("-"); de.filename_len = 1; cd->entry[j].filename = "-"; + cd->entry[j].filename_len = 1; } else { de.filename = strdup(za->cdir->entry[i].filename); @@ -195,13 +196,14 @@ error = 1; break; } + memcpy(cd->entry+j, za->cdir->entry+i, sizeof(cd->entry[j])); if (de.bitflags & ZIP_GPBF_DATA_DESCRIPTOR) { de.crc = za->cdir->entry[i].crc; de.comp_size = za->cdir->entry[i].comp_size; de.uncomp_size = za->cdir->entry[i].uncomp_size; de.bitflags &= ~ZIP_GPBF_DATA_DESCRIPTOR; + cd->entry[j].bitflags &= ~ZIP_GPBF_DATA_DESCRIPTOR; } - memcpy(cd->entry+j, za->cdir->entry+i, sizeof(cd->entry[j])); } if (za->entry[i].ch_filename) {This bug does not only affect OpenOffice, but also WinRar (I have version 3.80 under Windows). The bug happens whenever a file with more than 255 chars is added via addFromString... eg.: $zip->addFromString("test.txt","asdjdjfdlksjdaf"); //OK $zip->addFromString("test2.txt",str_repeat("A",256); //Corrupt archive The issue is resolved by upgrading to 5.2.11, on 5.2.6 it also works with no problems.