Hi,
I hope someone can advise me.
I am developing Java code to handle archives using commons compress and am
currently focusing on ZIP files. I understand that ZIPs can be encrypted in
two ways:
(a) the contained entries can be plain text or encrypted
(b) the whole ZIP itself can be encrypted
QUESTION 1: Is this correct?
If so, I need to be able to detect both. So far I only know how to handle (a),
by using this method:
public boolean checkZipEntryIsEncrypted(ZipArchiveEntry entry) {
boolean encrypted = false;
// Check if zip file is encrypted
if (zfile != null) {
if (! zfile.canReadEntryData(entry)) {
encrypted = true;
}
}
return encrypted;
}
QUESTION 2: is this the right way to detect encrypted entries?
QUESTION 3: what is the right way to detect that the ZIP itself is encrypted?
Thanks,
- Chris
Chris Bamford
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Kings Cross,
London, N1 9EG
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