From 86a515ea891675214769419835b196a0cbb14442 Mon Sep 17 00:00:00 2001
From: pabs <pabs@pablotron.org>
Date: Thu, 20 Sep 2007 23:46:01 -0400
Subject: Fix crc32 calculation.
---
zipstream.php | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
(limited to 'zipstream.php')
diff --git a/zipstream.php b/zipstream.php
index 5b8965f..1fe72dd 100644
--- a/zipstream.php
+++ b/zipstream.php
@@ -319,6 +319,7 @@ class ZipStream {
function add_large_file($name, $path, $opt = array()) {
$st = stat($path);
$block_size = 1048576; # process in 1 megabyte chunks
+ $algo = 'crc32b';
# calculate header attributes
$zlen = $len = $st['size'];
@@ -327,14 +328,15 @@ class ZipStream {
if ($meth_str == 'store') {
# store method
$meth = 0x00;
- $crc = hash_file('crc32', $path);
+ $crc = unpack('V', hash_file($algo, $path, true));
+ $crc = $crc[1];
} elseif ($meth_str == 'deflate') {
# deflate method
$meth = 0x08;
# open file, calculate crc and compressed file length
$fh = fopen($path, 'rb');
- $hash_ctx = hash_init('crc32');
+ $hash_ctx = hash_init($algo);
$zlen = 0;
# read each block, update crc and zlen
@@ -346,7 +348,8 @@ class ZipStream {
# close file and finalize crc
fclose($fh);
- $crc = hash_final($hash_ctx);
+ $crc = unpack('V', hash_final($hash_ctx, true));
+ $crc = $crc[1];
} else {
die("unknown large_file_method: $meth_str");
}
--
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