javax.crypto.BadPaddingException: Decryption error on Android

This happens if i connect from Android to an 1.12.2 Server (Vanilla and Spigot). I am logged in and i get disconnected because “Connection closed.”, the Server gives this Stacktrace:

[11:15:23 WARN]: javax.crypto.BadPaddingException: Decryption error [11:15:23 WARN]: at sun.security.rsa.RSAPadding.unpadV15(Unknown Source) [11:15:23 WARN]: at sun.security.rsa.RSAPadding.unpad(Unknown Source) [11:15:23 WARN]: at com.sun.crypto.provider.RSACipher.doFinal(RSACipher.java:363) [11:15:23 WARN]: at com.sun.crypto.provider.RSACipher.engineDoFinal(RSACipher.java:389) [11:15:23 WARN]: at javax.crypto.Cipher.doFinal(Cipher.java:2164) [11:15:23 WARN]: at net.minecraft.server.v1_12_R1.MinecraftEncryption.a(SourceFile:117) [11:15:23 WARN]: at net.minecraft.server.v1_12_R1.MinecraftEncryption.b(SourceFile:112) [11:15:23 WARN]: at net.minecraft.server.v1_12_R1.PacketLoginInEncryptionBegin.b(SourceFile:50) [11:15:23 WARN]: at net.minecraft.server.v1_12_R1.LoginListener.a(LoginListener.java:203) [11:15:23 WARN]: at net.minecraft.server.v1_12_R1.PacketLoginInEncryptionBegin.a(SourceFile:39) [11:15:23 WARN]: at net.minecraft.server.v1_12_R1.PacketLoginInEncryptionBegin.a(SourceFile:12) [11:15:23 WARN]: at net.minecraft.server.v1_12_R1.NetworkManager.a(NetworkManager.java:126) [11:15:23 WARN]: at net.minecraft.server.v1_12_R1.NetworkManager.channelRead0(NetworkManager.java:330) [11:15:23 WARN]: at net.minecraft.server.v1_12_R1.NetworkManager.channelRead0(NetworkManager.java:1) [11:15:23 WARN]: at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [11:15:23 WARN]: at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310) [11:15:23 WARN]: at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [11:15:23 WARN]: at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310) [11:15:23 WARN]: at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [11:15:23 WARN]: at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [11:15:23 WARN]: at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [11:15:23 WARN]: at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [11:15:23 WARN]: at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965) [11:15:23 WARN]: at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) [11:15:23 WARN]: at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645) [11:15:23 WARN]: at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580) [11:15:23 WARN]: at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497) [11:15:23 WARN]: at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459) [11:15:23 WARN]: at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) [11:15:23 WARN]: at java.lang.Thread.run(Unknown Source) [11:15:23 ERROR]: Cipher data failed! [11:15:23 INFO]: com.mojang.authlib.GameProfile@56fa3948[id=<null>,name=ThisIsNotMyRealName,properties={},legacy=false] (/192.168.0.109:36941) lost connection: Internal Exception: java.lang.IllegalStateException: Invalid nonce!

[Steveice10]

Very sorry, apparently I’ve been trying to test it in offline mode this whole time… It should work now. At the very least, it definitely works with OpenJDK now; I don’t have an Android app set up to test with.

[0-x-2-2]

Can you send the code you are using and what version of java you are running under.