1--TEST-- 2Bug #71417: fread() does not detect decoding errors from filter zlib.inflate 3--SKIPIF-- 4<?php if (!extension_loaded('zlib')) die ('skip zlib extension not available in this build'); ?> 5--FILE-- 6<?php 7 8function test($case) { 9 $plain = "The quick brown fox jumps over the lazy dog."; 10 $fn = "bug71417.gz"; 11 $compressed = (string) gzencode($plain); 12 13 if ($case == 1) { 14 // 1. Set a random byte in the middle of the compressed data. 15 // $ php test-zlib-inflate.php 16 // --> read: string(0) "" 17 // --> read: string(44) "The quick brown fox jumps over the lazx8dog." 18 // $ gzip test-zlib-inflate.gz 19 // gzip: test-zlib-inflate.gz: invalid compressed data--crc error 20 $compressed[strlen($compressed) - 15] = 'X'; 21 } else if ($case == 2) { 22 // 2. Truncate the compressed data. 23 // $ php test-zlib-inflate.php 24 // --> read: string(32) "The quick brown fox jumps over t" 25 // $ gzip test-zlib-inflate.gz 26 // gzip: test-zlib-inflate.gz: unexpected end of file 27 $compressed = substr($compressed, 0, strlen($compressed) - 20); 28 } else if ($case == 3) { 29 // 3. Corrupted final CRC. 30 // $ php test-zlib-inflate.php 31 // --> read: string(0) "" 32 // --> read: string(44) "The quick brown fox jumps over the lazy dog." 33 // $ gzip test-zlib-inflate.gz 34 // gzip: test-zlib-inflate.gz: invalid compressed data--crc error 35 $compressed[strlen($compressed)-5] = 'X'; 36 } else if ($case == 4) { 37 // 4. Corrupted final length. 38 // $ php test-zlib-inflate.phpread: string(0) "" 39 // read: string(44) "The quick brown fox jumps over the lazy dog." 40 // $ gunzip test-zlib-inflate.gz 41 // gzip: test-zlib-inflate.gz: invalid compressed data--length error 42 $compressed[strlen($compressed)-2] = 'X'; 43 } 44 45 // The gzdecode() function applied to the corrupted compressed data always 46 // detects the error: 47 // --> gzdecode(): PHP Fatal error: Uncaught ErrorException: gzdecode(): data error in ... 48 echo "gzdecode(): ", rawurldecode(gzdecode($compressed)), "\n"; 49 50 file_put_contents($fn, $compressed); 51 52 $r = fopen($fn, "r"); 53 stream_filter_append($r, 'zlib.inflate', STREAM_FILTER_READ, array('window' => 15+16)); 54 while (!feof($r)) { 55 $s = fread($r, 100); 56 echo "read: "; var_dump($s); 57 } 58 fclose($r); 59 unlink($fn); 60} 61 62test(1); 63test(2); 64test(3); 65test(4); 66 67?> 68--EXPECTF-- 69gzdecode(): 70Warning: gzdecode(): data error in %s on line %d 71 72read: bool(false) 73gzdecode(): 74Warning: gzdecode(): data error in %s on line %d 75 76read: string(32) "The quick brown fox jumps over t" 77gzdecode(): 78Warning: gzdecode(): data error in %s on line %d 79 80read: bool(false) 81gzdecode(): 82Warning: gzdecode(): data error in %s on line %d 83 84read: bool(false) 85
