https://github.com/eclipse-vertx/vertx-sql-client: The Reactive MySQL Client (Eclipse) 
abstract class io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec<R, C extends io.vertx.mysqlclient.impl.command.AuthenticationCommandBase<R>> extends io.vertx.mysqlclient.impl.codec.CommandCodec<R, C>
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec
  super_class: io.vertx.mysqlclient.impl.codec.CommandCodec
{
  protected static final int NONCE_LENGTH;
    descriptor: I
    flags: (0x001c) ACC_PROTECTED, ACC_STATIC, ACC_FINAL
    ConstantValue: 20

  protected static final int AUTH_SWITCH_REQUEST_STATUS_FLAG;
    descriptor: I
    flags: (0x001c) ACC_PROTECTED, ACC_STATIC, ACC_FINAL
    ConstantValue: 254

  protected static final int AUTH_MORE_DATA_STATUS_FLAG;
    descriptor: I
    flags: (0x001c) ACC_PROTECTED, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  protected static final int AUTH_PUBLIC_KEY_REQUEST_FLAG;
    descriptor: I
    flags: (0x001c) ACC_PROTECTED, ACC_STATIC, ACC_FINAL
    ConstantValue: 2

  protected static final int FAST_AUTH_STATUS_FLAG;
    descriptor: I
    flags: (0x001c) ACC_PROTECTED, ACC_STATIC, ACC_FINAL
    ConstantValue: 3

  protected static final int FULL_AUTHENTICATION_STATUS_FLAG;
    descriptor: I
    flags: (0x001c) ACC_PROTECTED, ACC_STATIC, ACC_FINAL
    ConstantValue: 4

  protected byte[] authPluginData;
    descriptor: [B
    flags: (0x0004) ACC_PROTECTED

  private boolean isWaitingForRsaPublicKey;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  void <init>();
    descriptor: (Lio/vertx/mysqlclient/impl/command/AuthenticationCommandBase;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec this
        start local 1 // io.vertx.mysqlclient.impl.command.AuthenticationCommandBase cmd
         0: .line 40
            aload 0 /* this */
            aload 1 /* cmd */
            invokespecial io.vertx.mysqlclient.impl.codec.CommandCodec.<init>:(Lio/vertx/sqlclient/impl/command/CommandBase;)V
         1: .line 37
            aload 0 /* this */
            iconst_0
            putfield io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.isWaitingForRsaPublicKey:Z
         2: .line 41
            return
        end local 1 // io.vertx.mysqlclient.impl.command.AuthenticationCommandBase cmd
        end local 0 // io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lio/vertx/mysqlclient/impl/codec/AuthenticationCommandBaseCodec<TR;TC;>;
            0    3     1   cmd  TC;
    Signature: (TC;)V
    MethodParameters:
      Name  Flags
      cmd   

  protected final void handleAuthMoreData(byte[], io.netty.buffer.ByteBuf);
    descriptor: ([BLio/netty/buffer/ByteBuf;)V
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=6, locals=6, args_size=3
        start local 0 // io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec this
        start local 1 // byte[] password
        start local 2 // io.netty.buffer.ByteBuf payload
         0: .line 44
            aload 2 /* payload */
            iconst_1
            invokevirtual io.netty.buffer.ByteBuf.skipBytes:(I)Lio/netty/buffer/ByteBuf;
            pop
         1: .line 45
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.isWaitingForRsaPublicKey:Z
            ifeq 5
         2: .line 46
            aload 0 /* this */
            aload 2 /* payload */
            getstatic java.nio.charset.StandardCharsets.UTF_8:Ljava/nio/charset/Charset;
            invokevirtual io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.readRestOfPacketString:(Lio/netty/buffer/ByteBuf;Ljava/nio/charset/Charset;)Ljava/lang/String;
            astore 3 /* serverRsaPublicKey */
        start local 3 // java.lang.String serverRsaPublicKey
         3: .line 47
            aload 0 /* this */
            aload 1 /* password */
            aload 3 /* serverRsaPublicKey */
            invokevirtual io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.sendEncryptedPasswordWithServerRsaPublicKey:([BLjava/lang/String;)V
        end local 3 // java.lang.String serverRsaPublicKey
         4: .line 48
            goto 29
         5: .line 49
      StackMap locals:
      StackMap stack:
            aload 2 /* payload */
            invokevirtual io.netty.buffer.ByteBuf.readByte:()B
            istore 3 /* flag */
        start local 3 // byte flag
         6: .line 50
            iload 3 /* flag */
            iconst_4
            if_icmpne 27
         7: .line 51
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.encoder:Lio/vertx/mysqlclient/impl/codec/MySQLEncoder;
            getfield io.vertx.mysqlclient.impl.codec.MySQLEncoder.socketConnection:Lio/vertx/mysqlclient/impl/MySQLSocketConnection;
            invokevirtual io.vertx.mysqlclient.impl.MySQLSocketConnection.isSsl:()Z
            ifeq 16
         8: .line 53
            aload 1 /* password */
            arraylength
            iconst_1
            iadd
            istore 4 /* nonScrambledPasswordPacketLength */
        start local 4 // int nonScrambledPasswordPacketLength
         9: .line 54
            aload 0 /* this */
            iload 4 /* nonScrambledPasswordPacketLength */
            iconst_4
            iadd
            invokevirtual io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.allocateBuffer:(I)Lio/netty/buffer/ByteBuf;
            astore 5 /* nonScrambledPasswordPacket */
        start local 5 // io.netty.buffer.ByteBuf nonScrambledPasswordPacket
        10: .line 55
            aload 5 /* nonScrambledPasswordPacket */
            iload 4 /* nonScrambledPasswordPacketLength */
            invokevirtual io.netty.buffer.ByteBuf.writeMediumLE:(I)Lio/netty/buffer/ByteBuf;
            pop
        11: .line 56
            aload 5 /* nonScrambledPasswordPacket */
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.sequenceId:I
            invokevirtual io.netty.buffer.ByteBuf.writeByte:(I)Lio/netty/buffer/ByteBuf;
            pop
        12: .line 57
            aload 5 /* nonScrambledPasswordPacket */
            aload 1 /* password */
            invokevirtual io.netty.buffer.ByteBuf.writeBytes:([B)Lio/netty/buffer/ByteBuf;
            pop
        13: .line 58
            aload 5 /* nonScrambledPasswordPacket */
            iconst_0
            invokevirtual io.netty.buffer.ByteBuf.writeByte:(I)Lio/netty/buffer/ByteBuf;
            pop
        14: .line 59
            aload 0 /* this */
            aload 5 /* nonScrambledPasswordPacket */
            invokevirtual io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.sendNonSplitPacket:(Lio/netty/buffer/ByteBuf;)V
        end local 5 // io.netty.buffer.ByteBuf nonScrambledPasswordPacket
        end local 4 // int nonScrambledPasswordPacketLength
        15: .line 60
            goto 29
        16: .line 62
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.cmd:Lio/vertx/sqlclient/impl/command/CommandBase;
            checkcast io.vertx.mysqlclient.impl.command.AuthenticationCommandBase
            invokevirtual io.vertx.mysqlclient.impl.command.AuthenticationCommandBase.serverRsaPublicKey:()Lio/vertx/core/buffer/Buffer;
            astore 4 /* serverRsaPublicKey */
        start local 4 // io.vertx.core.buffer.Buffer serverRsaPublicKey
        17: .line 63
            aload 4 /* serverRsaPublicKey */
            ifnonnull 25
        18: .line 65
            aload 0 /* this */
            iconst_1
            putfield io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.isWaitingForRsaPublicKey:Z
        19: .line 66
            aload 0 /* this */
            iconst_5
            invokevirtual io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.allocateBuffer:(I)Lio/netty/buffer/ByteBuf;
            astore 5 /* rsaPublicKeyRequest */
        start local 5 // io.netty.buffer.ByteBuf rsaPublicKeyRequest
        20: .line 67
            aload 5 /* rsaPublicKeyRequest */
            iconst_1
            invokevirtual io.netty.buffer.ByteBuf.writeMediumLE:(I)Lio/netty/buffer/ByteBuf;
            pop
        21: .line 68
            aload 5 /* rsaPublicKeyRequest */
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.sequenceId:I
            invokevirtual io.netty.buffer.ByteBuf.writeByte:(I)Lio/netty/buffer/ByteBuf;
            pop
        22: .line 69
            aload 5 /* rsaPublicKeyRequest */
            iconst_2
            invokevirtual io.netty.buffer.ByteBuf.writeByte:(I)Lio/netty/buffer/ByteBuf;
            pop
        23: .line 70
            aload 0 /* this */
            aload 5 /* rsaPublicKeyRequest */
            invokevirtual io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.sendNonSplitPacket:(Lio/netty/buffer/ByteBuf;)V
        end local 5 // io.netty.buffer.ByteBuf rsaPublicKeyRequest
        24: .line 71
            goto 29
        25: .line 73
      StackMap locals: io.vertx.core.buffer.Buffer
      StackMap stack:
            aload 0 /* this */
            aload 1 /* password */
            aload 4 /* serverRsaPublicKey */
            invokeinterface io.vertx.core.buffer.Buffer.toString:()Ljava/lang/String;
            invokevirtual io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.sendEncryptedPasswordWithServerRsaPublicKey:([BLjava/lang/String;)V
        end local 4 // io.vertx.core.buffer.Buffer serverRsaPublicKey
        26: .line 76
            goto 29
      StackMap locals:
      StackMap stack:
        27: iload 3 /* flag */
            iconst_3
            if_icmpeq 29
        28: .line 79
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.completionHandler:Lio/vertx/core/Handler;
            new java.lang.UnsupportedOperationException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Unsupported flag for AuthMoreData : "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            iload 3 /* flag */
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.UnsupportedOperationException.<init>:(Ljava/lang/String;)V
            invokestatic io.vertx.sqlclient.impl.command.CommandResponse.failure:(Ljava/lang/Throwable;)Lio/vertx/sqlclient/impl/command/CommandResponse;
            invokeinterface io.vertx.core.Handler.handle:(Ljava/lang/Object;)V
        end local 3 // byte flag
        29: .line 82
      StackMap locals:
      StackMap stack:
            return
        end local 2 // io.netty.buffer.ByteBuf payload
        end local 1 // byte[] password
        end local 0 // io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec this
      LocalVariableTable:
        Start  End  Slot                              Name  Signature
            0   30     0                              this  Lio/vertx/mysqlclient/impl/codec/AuthenticationCommandBaseCodec<TR;TC;>;
            0   30     1                          password  [B
            0   30     2                           payload  Lio/netty/buffer/ByteBuf;
            3    4     3                serverRsaPublicKey  Ljava/lang/String;
            6   29     3                              flag  B
            9   15     4  nonScrambledPasswordPacketLength  I
           10   15     5        nonScrambledPasswordPacket  Lio/netty/buffer/ByteBuf;
           17   26     4                serverRsaPublicKey  Lio/vertx/core/buffer/Buffer;
           20   24     5               rsaPublicKeyRequest  Lio/netty/buffer/ByteBuf;
    MethodParameters:
          Name  Flags
      password  
      payload   

  protected final void sendEncryptedPasswordWithServerRsaPublicKey(byte[], java.lang.String);
    descriptor: ([BLjava/lang/String;)V
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=3, locals=5, args_size=3
        start local 0 // io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec this
        start local 1 // byte[] password
        start local 2 // java.lang.String serverRsaPublicKeyContent
         0: .line 87
            aload 1 /* password */
            aload 1 /* password */
            arraylength
            iconst_1
            iadd
            invokestatic java.util.Arrays.copyOf:([BI)[B
            astore 4 /* passwordInput */
        start local 4 // byte[] passwordInput
         1: .line 88
            aload 4 /* passwordInput */
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.authPluginData:[B
            aload 2 /* serverRsaPublicKeyContent */
            invokestatic io.vertx.mysqlclient.impl.util.RsaPublicKeyEncryptor.encrypt:([B[BLjava/lang/String;)[B
            astore 3 /* encryptedPassword */
        end local 4 // byte[] passwordInput
        start local 3 // byte[] encryptedPassword
         2: .line 89
            goto 6
        end local 3 // byte[] encryptedPassword
      StackMap locals:
      StackMap stack: java.lang.Exception
         3: astore 4 /* e */
        start local 4 // java.lang.Exception e
         4: .line 90
            aload 0 /* this */
            getfield io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.completionHandler:Lio/vertx/core/Handler;
            aload 4 /* e */
            invokestatic io.vertx.sqlclient.impl.command.CommandResponse.failure:(Ljava/lang/Throwable;)Lio/vertx/sqlclient/impl/command/CommandResponse;
            invokeinterface io.vertx.core.Handler.handle:(Ljava/lang/Object;)V
         5: .line 91
            return
        end local 4 // java.lang.Exception e
        start local 3 // byte[] encryptedPassword
         6: .line 93
      StackMap locals: byte[]
      StackMap stack:
            aload 0 /* this */
            aload 3 /* encryptedPassword */
            invokevirtual io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.sendBytesAsPacket:([B)V
         7: .line 94
            return
        end local 3 // byte[] encryptedPassword
        end local 2 // java.lang.String serverRsaPublicKeyContent
        end local 1 // byte[] password
        end local 0 // io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec this
      LocalVariableTable:
        Start  End  Slot                       Name  Signature
            0    8     0                       this  Lio/vertx/mysqlclient/impl/codec/AuthenticationCommandBaseCodec<TR;TC;>;
            0    8     1                   password  [B
            0    8     2  serverRsaPublicKeyContent  Ljava/lang/String;
            2    3     3          encryptedPassword  [B
            6    8     3          encryptedPassword  [B
            1    2     4              passwordInput  [B
            4    6     4                          e  Ljava/lang/Exception;
      Exception table:
        from    to  target  type
           0     2       3  Class java.lang.Exception
    MethodParameters:
                           Name  Flags
      password                   
      serverRsaPublicKeyContent  

  protected final void encodeConnectionAttributes(java.util.Map<java.lang.String, java.lang.String>, io.netty.buffer.ByteBuf);
    descriptor: (Ljava/util/Map;Lio/netty/buffer/ByteBuf;)V
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=3, locals=7, args_size=3
        start local 0 // io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec this
        start local 1 // java.util.Map clientConnectionAttributes
        start local 2 // io.netty.buffer.ByteBuf packet
         0: .line 97
            aconst_null
            astore 3 /* kv */
        start local 3 // io.netty.buffer.ByteBuf kv
         1: .line 99
            aload 0 /* this */
            invokevirtual io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec.allocateBuffer:()Lio/netty/buffer/ByteBuf;
            astore 3 /* kv */
         2: .line 100
            aload 1 /* clientConnectionAttributes */
            invokeinterface java.util.Map.entrySet:()Ljava/util/Set;
            invokeinterface java.util.Set.iterator:()Ljava/util/Iterator;
            astore 5
            goto 6
      StackMap locals: io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec java.util.Map io.netty.buffer.ByteBuf io.netty.buffer.ByteBuf top java.util.Iterator
      StackMap stack:
         3: aload 5
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast java.util.Map$Entry
            astore 4 /* attribute */
        start local 4 // java.util.Map$Entry attribute
         4: .line 101
            aload 3 /* kv */
            aload 4 /* attribute */
            invokeinterface java.util.Map$Entry.getKey:()Ljava/lang/Object;
            checkcast java.lang.String
            getstatic java.nio.charset.StandardCharsets.UTF_8:Ljava/nio/charset/Charset;
            invokestatic io.vertx.mysqlclient.impl.util.BufferUtils.writeLengthEncodedString:(Lio/netty/buffer/ByteBuf;Ljava/lang/String;Ljava/nio/charset/Charset;)V
         5: .line 102
            aload 3 /* kv */
            aload 4 /* attribute */
            invokeinterface java.util.Map$Entry.getValue:()Ljava/lang/Object;
            checkcast java.lang.String
            getstatic java.nio.charset.StandardCharsets.UTF_8:Ljava/nio/charset/Charset;
            invokestatic io.vertx.mysqlclient.impl.util.BufferUtils.writeLengthEncodedString:(Lio/netty/buffer/ByteBuf;Ljava/lang/String;Ljava/nio/charset/Charset;)V
        end local 4 // java.util.Map$Entry attribute
         6: .line 100
      StackMap locals:
      StackMap stack:
            aload 5
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 3
         7: .line 104
            aload 2 /* packet */
            aload 3 /* kv */
            invokevirtual io.netty.buffer.ByteBuf.readableBytes:()I
            i2l
            invokestatic io.vertx.mysqlclient.impl.util.BufferUtils.writeLengthEncodedInteger:(Lio/netty/buffer/ByteBuf;J)V
         8: .line 105
            aload 2 /* packet */
            aload 3 /* kv */
            invokevirtual io.netty.buffer.ByteBuf.writeBytes:(Lio/netty/buffer/ByteBuf;)Lio/netty/buffer/ByteBuf;
            pop
         9: .line 106
            goto 14
      StackMap locals: io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec java.util.Map io.netty.buffer.ByteBuf io.netty.buffer.ByteBuf
      StackMap stack: java.lang.Throwable
        10: astore 6
        11: .line 107
            aload 3 /* kv */
            ifnull 13
        12: .line 108
            aload 3 /* kv */
            invokestatic io.netty.util.ReferenceCountUtil.release:(Ljava/lang/Object;)Z
            pop
        13: .line 110
      StackMap locals: io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec java.util.Map io.netty.buffer.ByteBuf io.netty.buffer.ByteBuf top top java.lang.Throwable
      StackMap stack:
            aload 6
            athrow
        14: .line 107
      StackMap locals: io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec java.util.Map io.netty.buffer.ByteBuf io.netty.buffer.ByteBuf
      StackMap stack:
            aload 3 /* kv */
            ifnull 16
        15: .line 108
            aload 3 /* kv */
            invokestatic io.netty.util.ReferenceCountUtil.release:(Ljava/lang/Object;)Z
            pop
        16: .line 111
      StackMap locals:
      StackMap stack:
            return
        end local 3 // io.netty.buffer.ByteBuf kv
        end local 2 // io.netty.buffer.ByteBuf packet
        end local 1 // java.util.Map clientConnectionAttributes
        end local 0 // io.vertx.mysqlclient.impl.codec.AuthenticationCommandBaseCodec this
      LocalVariableTable:
        Start  End  Slot                        Name  Signature
            0   17     0                        this  Lio/vertx/mysqlclient/impl/codec/AuthenticationCommandBaseCodec<TR;TC;>;
            0   17     1  clientConnectionAttributes  Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;
            0   17     2                      packet  Lio/netty/buffer/ByteBuf;
            1   17     3                          kv  Lio/netty/buffer/ByteBuf;
            4    6     4                   attribute  Ljava/util/Map$Entry<Ljava/lang/String;Ljava/lang/String;>;
      Exception table:
        from    to  target  type
           1    10      10  any
    Signature: (Ljava/util/Map<Ljava/lang/String;Ljava/lang/String;>;Lio/netty/buffer/ByteBuf;)V
    MethodParameters:
                            Name  Flags
      clientConnectionAttributes  
      packet                      
}
Signature: <R:Ljava/lang/Object;C:Lio/vertx/mysqlclient/impl/command/AuthenticationCommandBase<TR;>;>Lio/vertx/mysqlclient/impl/codec/CommandCodec<TR;TC;>;
SourceFile: "AuthenticationCommandBaseCodec.java"
InnerClasses:
  public abstract Entry = java.util.Map$Entry of java.util.Map