[Jessie-discuss] Compression failed with fix.

[Cedric Hyppolite]

Hi,

I got the error using compression with Jessie 1.0.1 (and using a  
certificate with RSA keys -don't know if this impacts the behaviour  
of compression).

The exception is :
javax.net.ssl.SSLException: compression failed
	at org.metastatic.jessie.provider.GNUSecurityParameters.encrypt 
(GNUSecurityParameters.java:387)
	at org.metastatic.jessie.provider.RecordOutputStream.write 
(RecordOutputStream.java:126)
	at org.metastatic.jessie.provider.SSLSocketOutputStream.write 
(SSLSocketOutputStream.java:104)
	at org.metastatic.jessie.provider.SSLSocketOutputStream.write 
(SSLSocketOutputStream.java:90)

The calling function is :

	byte[] fragment = params.encrypt (ZERO, 0, 0, type); // ZERO is a  
byte[0]

And the exception is thrown by:
----
     if (deflater.deflate(JZlib.Z_SYNC_FLUSH) != JZlib.Z_OK)   
<<<<<<<-----
          {
            throw new SSLException("compression failed");
          }
 ----

I fixed this issue by taking the GNUSecurityParameters class from  
classpath 0.92 and fixing the few differences (package name,  
constructor call with SSLSession param, and GNUCrypto import  
differences).

With this fix, the compression works :-)

The dependency on jzlib can be cleanup since the java.util.zip is  
used instead.

Hope this helps,
Cedric