Description:
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Whenever the unpacked size of a file is greater than RAR_CHUNK_BUFFER_SIZE only RAR_CHUNK_BUFFER_SIZE bytes are allocated for the stream, resulting in incomplete reads.

Generate a random 10MB file and add it to a RAR archive.

dd if=/dev/urandom of=test.dat bs=1M count=10 && rar a test.rar test.dat

Test script:
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$rar = \RarArchive::open('test.rar');
if ($rar === false)
    die('Unable to open archive.');

$entry = $rar->getEntry('test.dat');
if ($entry === false)
    die('Unable to get entry.');

$contents = stream_get_contents($entry->getStream(), $entry->getUnpackedSize());
$expectedCRC = $entry->getCrc();
$actualCRC = dechex(crc32($contents));

if ($expectedCRC !== $actualCRC)
    die('CRC values do not match.');

die('All ok.');






Expected result:
----------------
The CRC values should match.

Actual result:
--------------
The CRC values do not match whenever the unpacked size is greater than RAR_CHUNK_BUFFER_SIZE.