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authorVirtualTam <virtualtam@flibidi.net>2017-09-19 22:08:29 +0200
committerVirtualTam <virtualtam@flibidi.net>2017-09-28 21:59:36 +0200
commit8c322aaba197bab1a9992b731db80d9faa133bc4 (patch)
treec7f16a6032c8a55cacbf20c62a231f934fa3a169 /application/FileUtils.php
parente4325b1517c3d9769c8e0141e37b2845bf8e4d09 (diff)
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Robustness: safer gzinflate/zlib usage
Relates to https://github.com/shaarli/Shaarli/pull/846 PHP's `gzinflate()` fails with an error when being passed an empty string See: - https://bugs.php.net/bug.php?id=71395 Signed-off-by: VirtualTam <virtualtam@flibidi.net>
Diffstat (limited to 'application/FileUtils.php')
-rw-r--r--application/FileUtils.php26
1 files changed, 16 insertions, 10 deletions
diff --git a/application/FileUtils.php b/application/FileUtils.php
index a167f642..918cb83b 100644
--- a/application/FileUtils.php
+++ b/application/FileUtils.php
@@ -50,7 +50,8 @@ class FileUtils
50 50
51 /** 51 /**
52 * Read data from a file containing Shaarli database format content. 52 * Read data from a file containing Shaarli database format content.
53 * If the file isn't readable or doesn't exists, default data will be returned. 53 *
54 * If the file isn't readable or doesn't exist, default data will be returned.
54 * 55 *
55 * @param string $file File path. 56 * @param string $file File path.
56 * @param mixed $default The default value to return if the file isn't readable. 57 * @param mixed $default The default value to return if the file isn't readable.
@@ -61,16 +62,21 @@ class FileUtils
61 { 62 {
62 // Note that gzinflate is faster than gzuncompress. 63 // Note that gzinflate is faster than gzuncompress.
63 // See: http://www.php.net/manual/en/function.gzdeflate.php#96439 64 // See: http://www.php.net/manual/en/function.gzdeflate.php#96439
64 if (is_readable($file)) { 65 if (! is_readable($file)) {
65 return unserialize( 66 return $default;
66 gzinflate( 67 }
67 base64_decode( 68
68 substr(file_get_contents($file), strlen(self::$phpPrefix), -strlen(self::$phpSuffix)) 69 $data = file_get_contents($file);
69 ) 70 if ($data == '') {
70 ) 71 return $default;
71 );
72 } 72 }
73 73
74 return $default; 74 return unserialize(
75 gzinflate(
76 base64_decode(
77 substr($data, strlen(self::$phpPrefix), -strlen(self::$phpSuffix))
78 )
79 )
80 );
75 } 81 }
76} 82}