Errors in Stream Object Parsing
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Key: PDFBOX-576
URL: https://issues.apache.org/jira/browse/PDFBOX-576
Project: PDFBox
Issue Type: Bug
Components: Parsing
Affects Versions: 0.8.0-incubator, 1.0.0
Reporter: Vincent Hennebert
Attachments: fixStreamParsing.diff
The readUntilEndStream method in org.apache.pdfbox.pdfparser.BaseParser doesn't
work properly. The read(byte[]) method doesn't guarantee that it will fill the
buffer, and as long as the buffer hasn't been filled the value of nextIdx will
be wrong. For example, say the call to read returns 5 bytes in the buffer.
nextIdx will have value 5, i.e. points to a yet uninitialized byte that will be
written to the output stream. Same at the next loop iteration, and in the end
the stream will start with 4 null bytes that don't belong to the original one.
Also, if the stream is terminated by endobj instead of endstream, the possible
bytes that are at the beginning of the buffer and precede endobj won't be
written out. The for loop will stop at the end of the buffer instead of looping
back to the beginning of it if necessary (say, if endobj happens to occupy
slots 3 to 8 of the buffer).
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