Hi there, We recently received a bug report in netty when JDK12 is used with ChaCha chiphers:
https://github.com/netty/netty/issues/9150 <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
