SSLEngine usage issue: handshake done, but unwrap returns 8 bytes from 32

Hello,
I'm trying to use SSLEngine API in order to secure Java/NIO based 3th party middle-ware platform. So far I've succeed with writing correct handshake code and on both server and client I get handshake successfully done, the problem starts when client sends server its message. It is 32 bytes long encrypted on the client side to 37 bytes. On the server side I see (while using -Djavax.net.debug=all) that during the SSLEngine.unwrap call the bytes are correctly decrypted into exact byte sequence as on the client side. However, the problem is that from SSLEngine.unwrap I get just 8 bytes instead of those 32. The debug messages looks:
[Raw read (bb)]: length = 37
0000: 17 03 01 00 20 56 68 6E 1F 56 C1 41 6E CD C0 A4 .... Vhn.V.An...
0010: F0 84 6A E9 C8 4F A9 AE 29 AF 87 D9 EA 61 09 15 ..j..O..)....a..
0020: EC 08 28 1E 60 ..(.`
Padded plaintext after DECRYPTION: len = 32
0000: 02 00 01 00 03 63 64 6F E3 06 78 5A D6 9C D4 D0 .....cdo..xZ....
0010: 68 B1 F7 B1 7F 34 88 AC 36 1C 7A 72 03 03 03 03 h....4..6.zr....
*** SERVER: peerNetBuf after unwrap: java.nio.HeapByteBuffer[pos=37 lim=37 cap=16665]
*** SERVER: res: Status = OK HandshakeStatus = NOT_HANDSHAKING
bytesConsumed = 37 bytesProduced = 8
Messages starting with *** SERVER are of my application. Everything other is emitted by Java while using -Djavax.net.debug=all. As you can see all data from peerNetBuf which is a buffer holding encrypted data got from network, so all those data are consumed well -- so I don't need to call unwrap second time like it sometimes happen during the handshake phase...
Now, my question is: how to convince SSLEngine.unwrap to correctly return me all those 32 bytes which I expect?
Thanks,
Karel

You will have to post some code. The SSLEngine tells you what it wants you to do next, all you really have to do is keep doing that: wrap, unwrap when needed, or write on an overflow and read on an underflow. Was there enough room in your app buffer for all 32 bytes? And what was the final result status?

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SSLEngine usage issue: handshake done, but unwrap returns 8 bytes from 32

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