csu3_am335x/EVSE/GPL/php-8.1.12/ext/bz2/tests/bug71263.phpt

--TEST--
Bug #71263: fread() does not report bzip2.decompress errors
--EXTENSIONS--
bz2
--FILE--
<?php

function test($case) {
    $plain = "The quick brown fox jumps over the lazy dog.";
    $fn = "bug71263.bz2";
    $compressed = (string) bzcompress($plain);
    echo "Compressed len = ", strlen($compressed), "\n";

    if ($case == 1) {
        // Set a random byte in the middle of the compressed data
        // --> php_bz2_decompress_filter() detects fatal error
        // --> fread() displays empty string then garbage, no errors detected:
        $compressed[strlen($compressed) - 15] = 'X';
    } else if ($case == 2) {
        // Truncate the compressed data
        // --> php_bz2_decompress_filter() does not detect errors,
        // --> fread() displays the empty string:
        $compressed = substr($compressed, 0, strlen($compressed) - 20);
    } else {
        // Corrupted final CRC
        // --> php_bz2_decompress_filter() detects fatal error
        // --> fread() displays an empty string, then the correct plain text, no error detected:
        $compressed[strlen($compressed)-2] = 'X';
    }

    file_put_contents($fn, $compressed);

    $r = fopen($fn, "r");
    stream_filter_append($r, 'bzip2.decompress', STREAM_FILTER_READ);
    while (!feof($r)) {
        $s = fread($r, 100);
        echo "read: "; var_dump($s);
    }
    fclose($r);
    unlink($fn);
}

test(1);
test(2);
test(3);
?>
--EXPECTF--
Compressed len = 81

Notice: fread(): bzip2 decompression failed in %s on line %d
read: bool(false)
Compressed len = 81
read: string(0) ""
Compressed len = 81

Notice: fread(): bzip2 decompression failed in %s on line %d
read: bool(false)