Possible bug with JDK12 and ChaCha ciphers

[Norman Maurer]

Unfortunately I am very busy atm so it may take me a few days. I asked the original reported of the issue to provide some in the netty issue tracker. I will come back to you.

Bye
Norman


> On 17. May 2019, at 20:27, Xuelei Fan <xuelei.fan at oracle.com> wrote:
> 
> Hi Norman,
> 
> If you are able to reproduce this issue, would you mind post the JSSE debug log (by using Java System Property, "javax.net.debug=all")?
> 
> Please feel free to submit a bug.
> 
> Thanks & Regards,
> Xuelei
> 
> On 5/17/2019 11:02 AM, Norman Maurer wrote:
>> Hi there,
>> We recently received a bug report in netty when JDK12 is used with ChaCha chiphers:
>> https://github.com/netty/netty/issues/9150
>> Basically it seems like there is a problem in how it uses the ByteBuffer internally:
>> |Caused by: java.lang.RuntimeException: javax.crypto.ShortBufferException: Output buffer too small at java.base/com.sun.crypto.provider.ChaCha20Cipher.engineDoFinal(ChaCha20Cipher.java:703) at java.base/javax.crypto.CipherSpi.bufferCrypt(CipherSpi.java:826) at java.base/javax.crypto.CipherSpi.engineDoFinal(CipherSpi.java:730) at java.base/javax.crypto.Cipher.doFinal(Cipher.java:2503) at java.base/sun.security.ssl.SSLCipher$T12CC20P1305ReadCipherGenerator$CC20P1305ReadCipher.decrypt(SSLCipher.java:2188) at java.base/sun.security.ssl.SSLEngineInputRecord.decodeInputRecord(SSLEngineInputRecord.java:240) at java.base/sun.security.ssl.SSLEngineInputRecord.decode(SSLEngineInputRecord.java:197) at java.base/sun.security.ssl.SSLEngineInputRecord.decode(SSLEngineInputRecord.java:160) at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:108) at java.base/sun.security.ssl.SSLEngineImpl.decode(SSLEngineImpl.java:681) at java.base/sun.security.ssl.SSLEngineImpl.readRecord(SSLEngineImpl.java:636) at java.base/sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:454) ... 25 common frames omitted Caused by: javax.crypto.ShortBufferException: Output buffer too small at java.base/com.sun.crypto.provider.ChaCha20Cipher$EngineAEADDec.doFinal(ChaCha20Cipher.java:1360) at java.base/com.sun.crypto.provider.ChaCha20Cipher.engineDoFinal(ChaCha20Cipher.java:701)|
>> Unfortunately I have no standalone reproducer yet but I just wanted to bring it up here in case it helps.
>> It only happens on JDK12 it seems. Check the Netty issue for more details…
>> Bye
>> Norman