/**
* Ensures the current entry's size and CRC information is set to the values just written,
* verifies it isn't too big in the Zip64Mode.Never case and returns whether the entry would
* require a Zip64 extra field.
*/
private boolean handleSizesAndCrc(long bytesWritten, long crc, Zip64Mode effectiveMode)
throws ZipException {
if (entry.entry.getMethod() == DEFLATED) {
/* It turns out def.getBytesRead() returns wrong values if
* the size exceeds 4 GB on Java < Java7
entry.entry.setSize(def.getBytesRead());
*/
entry.entry.setSize(entry.bytesRead);
entry.entry.setCompressedSize(bytesWritten);
entry.entry.setCrc(crc);
def.reset();
} else if (raf == null) {
if (entry.entry.getCrc() != crc) {
throw new ZipException(
"bad CRC checksum for entry "
+ entry.entry.getName()
+ ": "
+ Long.toHexString(entry.entry.getCrc())
+ " instead of "
+ Long.toHexString(crc));
}
if (entry.entry.getSize() != bytesWritten) {
throw new ZipException(
"bad size for entry "
+ entry.entry.getName()
+ ": "
+ entry.entry.getSize()
+ " instead of "
+ bytesWritten);
}
} else {
/* method is STORED and we used RandomAccessFile */
entry.entry.setSize(bytesWritten);
entry.entry.setCompressedSize(bytesWritten);
entry.entry.setCrc(crc);
}
final boolean actuallyNeedsZip64 =
effectiveMode == Zip64Mode.Always
|| entry.entry.getSize() >= ZIP64_MAGIC
|| entry.entry.getCompressedSize() >= ZIP64_MAGIC;
if (actuallyNeedsZip64 && effectiveMode == Zip64Mode.Never) {
throw new Zip64RequiredException(Zip64RequiredException.getEntryTooBigMessage(entry.entry));
}
return actuallyNeedsZip64;
}
/**
* Throws an exception if the size is unknown for a stored entry that is written to a non-seekable
* output or the entry is too big to be written without Zip64 extra but the mode has been set to
* Never.
*/
private void validateSizeInformation(Zip64Mode effectiveMode) throws ZipException {
// Size/CRC not required if RandomAccessFile is used
if (entry.entry.getMethod() == STORED && raf == null) {
if (entry.entry.getSize() == ArchiveEntry.SIZE_UNKNOWN) {
throw new ZipException(
"uncompressed size is required for" + " STORED method when not writing to a" + " file");
}
if (entry.entry.getCrc() == -1) {
throw new ZipException(
"crc checksum is required for STORED" + " method when not writing to a file");
}
entry.entry.setCompressedSize(entry.entry.getSize());
}
if ((entry.entry.getSize() >= ZIP64_MAGIC || entry.entry.getCompressedSize() >= ZIP64_MAGIC)
&& effectiveMode == Zip64Mode.Never) {
throw new Zip64RequiredException(Zip64RequiredException.getEntryTooBigMessage(entry.entry));
}
}
