[Cryptix-users] decodedInputStream.init out of memory on uncompressed long files

[Ale <ale...@da...>]

Hello list,

I'm experiencing a problem when decrypting uncompressed files generated
with GnuPG version

gpg (GnuPG) 1.2.7

with the following command line:

gpg -z 0 --disable-mdc --batch --yes -o out.gpg -r 'fpr' --encrypt in.file


I'm using the example provided with the cryptix snapshot version:

Cryptix OpenPGP  	snapshot  	2005/04/18  	
Cryptix JCE  		snapshot  	2005/03/28

The problem is that when I try to decrypt a file, to say, of about 10 Mb
and using a heap size of 256Mb (that to me seems way to big anyway), the
engineInit for decodedInputStream takes a long time but it can decrypt
the message.
When trying to decrypt a bigger file, that is about 90 Mb, the
engineInit takes a long time and after that long time, I get an
OutOfMemory exception (even with -Xmx256m).

- Format: OpenPGP:CryptixOpenPGP version 0.20050418
- before init..
- decryption key return..
- Decryption key returned
cryptix.message.stream.DecryptionKeyReturnValue@65a77f
-Exception in thread "Thread-5" java.lang.OutOfMemoryError: Java heap space


When trying to decrypt files, encrypted without the -z 0 gpg option, the
init process seems to be ok, it takes a very short time, but with the
90Mb file, the read() method of decodedInputStream throws an exception of:

Error: java.io.IOException: Fatal data format exception: Read tried past
end of inputstream.
java.io.IOException: Fatal data format exception: Read tried past end of
inputstream.
        at
cryptix.openpgp.io.PGPInputStreamAdapter.read(PGPInputStreamAdapter.java:127)
        at
java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:214)
        at
java.util.zip.InflaterInputStream.read(InflaterInputStream.java:134)
        at
cryptix.openpgp.algorithm.PGPDeflate$ZlibIn.readInternal(PGPDeflate.java:112)
        at
cryptix.openpgp.io.PGPCompressorInputStream.read(PGPCompressorInputStream.java:81)
        at
cryptix.openpgp.io.PGPLengthDataInputStream.readDirect(PGPLengthDataInputStream.java:120)
        at
cryptix.openpgp.io.PGPLengthDataInputStream.readInternal(PGPLengthDataInputStream.java:159)
        at
cryptix.openpgp.io.PGPLengthDataInputStream.readBuffer(PGPLengthDataInputStream.java:286)
        at
cryptix.openpgp.provider.PGPDecodedMessageInputStream$LiteralInputStream.read(PGPDecodedMessageInputStream.java:591)
        at
cryptix.openpgp.provider.PGPDecodedMessageInputStream.engineRead(PGPDecodedMessageInputStream.java:472)
        at
cryptix.message.stream.DecodedMessageInputStream.read(DecodedMessageInputStream.java:156)
        at java.io.InputStream.read(InputStream.java:89)
        at
decryptmedia.DecryptionProvider.decryptFile(DecryptionProvider.java:112)
        at
decryptmedia.DecodeXferUI$DecryptLauncher.run(DecodeXferUI.java:233)
        at java.lang.Thread.run(Thread.java:595)


Seems that the file has been trunked an amount of file always less then
the buffer size that is 4096 bytes.

Any help will be appreciated, infact if we can overcome this problem, we
will continue using this software in a production enviroment, even with
some sort of commercial relationship.


Regards,

Alessandro Audero