abstract class com.sun.crypto.provider.HmacCore extends javax.crypto.MacSpi implements java.lang.Cloneable
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: com.sun.crypto.provider.HmacCore
  super_class: javax.crypto.MacSpi
{
  private java.security.MessageDigest md;
    descriptor: Ljava/security/MessageDigest;
    flags: (0x0002) ACC_PRIVATE

  private byte[] k_ipad;
    descriptor: [B
    flags: (0x0002) ACC_PRIVATE

  private byte[] k_opad;
    descriptor: [B
    flags: (0x0002) ACC_PRIVATE

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

  private final int blockLen;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  void <init>(java.security.MessageDigest, int);
    descriptor: (Ljava/security/MessageDigest;I)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.sun.crypto.provider.HmacCore this
        start local 1 // java.security.MessageDigest md
        start local 2 // int bl
         0: .line 59
            aload 0 /* this */
            invokespecial javax.crypto.MacSpi.<init>:()V
         1: .line 60
            aload 0 /* this */
            aload 1 /* md */
            putfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
         2: .line 61
            aload 0 /* this */
            iload 2 /* bl */
            putfield com.sun.crypto.provider.HmacCore.blockLen:I
         3: .line 62
            aload 0 /* this */
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.blockLen:I
            newarray 8
            putfield com.sun.crypto.provider.HmacCore.k_ipad:[B
         4: .line 63
            aload 0 /* this */
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.blockLen:I
            newarray 8
            putfield com.sun.crypto.provider.HmacCore.k_opad:[B
         5: .line 64
            aload 0 /* this */
            iconst_1
            putfield com.sun.crypto.provider.HmacCore.first:Z
         6: .line 65
            return
        end local 2 // int bl
        end local 1 // java.security.MessageDigest md
        end local 0 // com.sun.crypto.provider.HmacCore this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lcom/sun/crypto/provider/HmacCore;
            0    7     1    md  Ljava/security/MessageDigest;
            0    7     2    bl  I
    MethodParameters:
      Name  Flags
      md    
      bl    

  void <init>(java.lang.String, int);
    descriptor: (Ljava/lang/String;I)V
    flags: (0x0000) 
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.sun.crypto.provider.HmacCore this
        start local 1 // java.lang.String digestAlgorithm
        start local 2 // int bl
         0: .line 72
            aload 0 /* this */
            aload 1 /* digestAlgorithm */
            invokestatic java.security.MessageDigest.getInstance:(Ljava/lang/String;)Ljava/security/MessageDigest;
            iload 2 /* bl */
            invokespecial com.sun.crypto.provider.HmacCore.<init>:(Ljava/security/MessageDigest;I)V
         1: .line 73
            return
        end local 2 // int bl
        end local 1 // java.lang.String digestAlgorithm
        end local 0 // com.sun.crypto.provider.HmacCore this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    2     0             this  Lcom/sun/crypto/provider/HmacCore;
            0    2     1  digestAlgorithm  Ljava/lang/String;
            0    2     2               bl  I
    Exceptions:
      throws java.security.NoSuchAlgorithmException
    MethodParameters:
                 Name  Flags
      digestAlgorithm  
      bl               

  protected int engineGetMacLength();
    descriptor: ()I
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.sun.crypto.provider.HmacCore this
         0: .line 81
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            invokevirtual java.security.MessageDigest.getDigestLength:()I
            ireturn
        end local 0 // com.sun.crypto.provider.HmacCore this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/sun/crypto/provider/HmacCore;

  protected void engineInit(java.security.Key, java.security.spec.AlgorithmParameterSpec);
    descriptor: (Ljava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=6, args_size=3
        start local 0 // com.sun.crypto.provider.HmacCore this
        start local 1 // java.security.Key key
        start local 2 // java.security.spec.AlgorithmParameterSpec params
         0: .line 97
            aload 2 /* params */
            ifnull 4
         1: .line 98
            new java.security.InvalidAlgorithmParameterException
            dup
         2: .line 99
            ldc "HMAC does not use parameters"
         3: .line 98
            invokespecial java.security.InvalidAlgorithmParameterException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 102
      StackMap locals:
      StackMap stack:
            aload 1 /* key */
            instanceof javax.crypto.SecretKey
            ifne 6
         5: .line 103
            new java.security.InvalidKeyException
            dup
            ldc "Secret key expected"
            invokespecial java.security.InvalidKeyException.<init>:(Ljava/lang/String;)V
            athrow
         6: .line 106
      StackMap locals:
      StackMap stack:
            aload 1 /* key */
            invokeinterface java.security.Key.getEncoded:()[B
            astore 3 /* secret */
        start local 3 // byte[] secret
         7: .line 107
            aload 3 /* secret */
            ifnonnull 9
         8: .line 108
            new java.security.InvalidKeyException
            dup
            ldc "Missing key data"
            invokespecial java.security.InvalidKeyException.<init>:(Ljava/lang/String;)V
            athrow
         9: .line 113
      StackMap locals: byte[]
      StackMap stack:
            aload 3 /* secret */
            arraylength
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.blockLen:I
            if_icmple 13
        10: .line 114
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            aload 3 /* secret */
            invokevirtual java.security.MessageDigest.digest:([B)[B
            astore 4 /* tmp */
        start local 4 // byte[] tmp
        11: .line 116
            aload 3 /* secret */
            iconst_0
            invokestatic java.util.Arrays.fill:([BB)V
        12: .line 117
            aload 4 /* tmp */
            astore 3 /* secret */
        end local 4 // byte[] tmp
        13: .line 121
      StackMap locals:
      StackMap stack:
            iconst_0
            istore 4 /* i */
        start local 4 // int i
        14: goto 21
        15: .line 122
      StackMap locals: int
      StackMap stack:
            iload 4 /* i */
            aload 3 /* secret */
            arraylength
            if_icmpge 16
            aload 3 /* secret */
            iload 4 /* i */
            baload
            goto 17
      StackMap locals:
      StackMap stack:
        16: iconst_0
      StackMap locals:
      StackMap stack: int
        17: istore 5 /* si */
        start local 5 // int si
        18: .line 123
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.k_ipad:[B
            iload 4 /* i */
            iload 5 /* si */
            bipush 54
            ixor
            i2b
            bastore
        19: .line 124
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.k_opad:[B
            iload 4 /* i */
            iload 5 /* si */
            bipush 92
            ixor
            i2b
            bastore
        end local 5 // int si
        20: .line 121
            iinc 4 /* i */ 1
      StackMap locals:
      StackMap stack:
        21: iload 4 /* i */
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.blockLen:I
            if_icmplt 15
        end local 4 // int i
        22: .line 128
            aload 3 /* secret */
            iconst_0
            invokestatic java.util.Arrays.fill:([BB)V
        23: .line 129
            aconst_null
            astore 3 /* secret */
        24: .line 131
            aload 0 /* this */
            invokevirtual com.sun.crypto.provider.HmacCore.engineReset:()V
        25: .line 132
            return
        end local 3 // byte[] secret
        end local 2 // java.security.spec.AlgorithmParameterSpec params
        end local 1 // java.security.Key key
        end local 0 // com.sun.crypto.provider.HmacCore this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0   26     0    this  Lcom/sun/crypto/provider/HmacCore;
            0   26     1     key  Ljava/security/Key;
            0   26     2  params  Ljava/security/spec/AlgorithmParameterSpec;
            7   26     3  secret  [B
           11   13     4     tmp  [B
           14   22     4       i  I
           18   20     5      si  I
    Exceptions:
      throws java.security.InvalidKeyException, java.security.InvalidAlgorithmParameterException
    MethodParameters:
        Name  Flags
      key     
      params  

  protected void engineUpdate(byte);
    descriptor: (B)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.sun.crypto.provider.HmacCore this
        start local 1 // byte input
         0: .line 140
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.first:Z
            ifeq 3
         1: .line 142
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.k_ipad:[B
            invokevirtual java.security.MessageDigest.update:([B)V
         2: .line 143
            aload 0 /* this */
            iconst_0
            putfield com.sun.crypto.provider.HmacCore.first:Z
         3: .line 147
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            iload 1 /* input */
            invokevirtual java.security.MessageDigest.update:(B)V
         4: .line 148
            return
        end local 1 // byte input
        end local 0 // com.sun.crypto.provider.HmacCore this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    5     0   this  Lcom/sun/crypto/provider/HmacCore;
            0    5     1  input  B
    MethodParameters:
       Name  Flags
      input  

  protected void engineUpdate(byte[], int, int);
    descriptor: ([BII)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=4, args_size=4
        start local 0 // com.sun.crypto.provider.HmacCore this
        start local 1 // byte[] input
        start local 2 // int offset
        start local 3 // int len
         0: .line 159
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.first:Z
            ifeq 3
         1: .line 161
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.k_ipad:[B
            invokevirtual java.security.MessageDigest.update:([B)V
         2: .line 162
            aload 0 /* this */
            iconst_0
            putfield com.sun.crypto.provider.HmacCore.first:Z
         3: .line 166
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            aload 1 /* input */
            iload 2 /* offset */
            iload 3 /* len */
            invokevirtual java.security.MessageDigest.update:([BII)V
         4: .line 167
            return
        end local 3 // int len
        end local 2 // int offset
        end local 1 // byte[] input
        end local 0 // com.sun.crypto.provider.HmacCore this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    5     0    this  Lcom/sun/crypto/provider/HmacCore;
            0    5     1   input  [B
            0    5     2  offset  I
            0    5     3     len  I
    MethodParameters:
        Name  Flags
      input   
      offset  
      len     

  protected void engineUpdate(java.nio.ByteBuffer);
    descriptor: (Ljava/nio/ByteBuffer;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.sun.crypto.provider.HmacCore this
        start local 1 // java.nio.ByteBuffer input
         0: .line 176
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.first:Z
            ifeq 3
         1: .line 178
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.k_ipad:[B
            invokevirtual java.security.MessageDigest.update:([B)V
         2: .line 179
            aload 0 /* this */
            iconst_0
            putfield com.sun.crypto.provider.HmacCore.first:Z
         3: .line 182
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            aload 1 /* input */
            invokevirtual java.security.MessageDigest.update:(Ljava/nio/ByteBuffer;)V
         4: .line 183
            return
        end local 1 // java.nio.ByteBuffer input
        end local 0 // com.sun.crypto.provider.HmacCore this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    5     0   this  Lcom/sun/crypto/provider/HmacCore;
            0    5     1  input  Ljava/nio/ByteBuffer;
    MethodParameters:
       Name  Flags
      input  

  protected byte[] engineDoFinal();
    descriptor: ()[B
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=2, args_size=1
        start local 0 // com.sun.crypto.provider.HmacCore this
         0: .line 192
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.first:Z
            ifeq 3
         1: .line 194
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.k_ipad:[B
            invokevirtual java.security.MessageDigest.update:([B)V
         2: .line 195
            goto 4
         3: .line 196
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            iconst_1
            putfield com.sun.crypto.provider.HmacCore.first:Z
         4: .line 201
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            invokevirtual java.security.MessageDigest.digest:()[B
            astore 1 /* tmp */
        start local 1 // byte[] tmp
         5: .line 204
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.k_opad:[B
            invokevirtual java.security.MessageDigest.update:([B)V
         6: .line 206
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            aload 1 /* tmp */
            invokevirtual java.security.MessageDigest.update:([B)V
         7: .line 208
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            aload 1 /* tmp */
            iconst_0
            aload 1 /* tmp */
            arraylength
            invokevirtual java.security.MessageDigest.digest:([BII)I
            pop
         8: .line 209
            aload 1 /* tmp */
         9: areturn
        end local 1 // byte[] tmp
        10: .line 210
      StackMap locals:
      StackMap stack: java.security.DigestException
            astore 1 /* e */
        start local 1 // java.security.DigestException e
        11: .line 212
            new java.security.ProviderException
            dup
            aload 1 /* e */
            invokespecial java.security.ProviderException.<init>:(Ljava/lang/Throwable;)V
            athrow
        end local 1 // java.security.DigestException e
        end local 0 // com.sun.crypto.provider.HmacCore this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   12     0  this  Lcom/sun/crypto/provider/HmacCore;
            5   10     1   tmp  [B
           11   12     1     e  Ljava/security/DigestException;
      Exception table:
        from    to  target  type
           4     9      10  Class java.security.DigestException

  protected void engineReset();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.sun.crypto.provider.HmacCore this
         0: .line 221
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.first:Z
            ifne 3
         1: .line 222
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            invokevirtual java.security.MessageDigest.reset:()V
         2: .line 223
            aload 0 /* this */
            iconst_1
            putfield com.sun.crypto.provider.HmacCore.first:Z
         3: .line 225
      StackMap locals:
      StackMap stack:
            return
        end local 0 // com.sun.crypto.provider.HmacCore this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lcom/sun/crypto/provider/HmacCore;

  public java.lang.Object clone();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // com.sun.crypto.provider.HmacCore this
         0: .line 231
            aload 0 /* this */
            invokespecial javax.crypto.MacSpi.clone:()Ljava/lang/Object;
            checkcast com.sun.crypto.provider.HmacCore
            astore 1 /* copy */
        start local 1 // com.sun.crypto.provider.HmacCore copy
         1: .line 232
            aload 1 /* copy */
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
            invokevirtual java.security.MessageDigest.clone:()Ljava/lang/Object;
            checkcast java.security.MessageDigest
            putfield com.sun.crypto.provider.HmacCore.md:Ljava/security/MessageDigest;
         2: .line 233
            aload 1 /* copy */
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.k_ipad:[B
            invokevirtual byte[].clone:()Ljava/lang/Object;
            checkcast byte[]
            putfield com.sun.crypto.provider.HmacCore.k_ipad:[B
         3: .line 234
            aload 1 /* copy */
            aload 0 /* this */
            getfield com.sun.crypto.provider.HmacCore.k_opad:[B
            invokevirtual byte[].clone:()Ljava/lang/Object;
            checkcast byte[]
            putfield com.sun.crypto.provider.HmacCore.k_opad:[B
         4: .line 235
            aload 1 /* copy */
            areturn
        end local 1 // com.sun.crypto.provider.HmacCore copy
        end local 0 // com.sun.crypto.provider.HmacCore this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lcom/sun/crypto/provider/HmacCore;
            1    5     1  copy  Lcom/sun/crypto/provider/HmacCore;
    Exceptions:
      throws java.lang.CloneNotSupportedException
}
SourceFile: "HmacCore.java"
NestMembers:
  com.sun.crypto.provider.HmacCore$HmacSHA224  com.sun.crypto.provider.HmacCore$HmacSHA256  com.sun.crypto.provider.HmacCore$HmacSHA384  com.sun.crypto.provider.HmacCore$HmacSHA512
InnerClasses:
  public final HmacSHA224 = com.sun.crypto.provider.HmacCore$HmacSHA224 of com.sun.crypto.provider.HmacCore
  public final HmacSHA256 = com.sun.crypto.provider.HmacCore$HmacSHA256 of com.sun.crypto.provider.HmacCore
  public final HmacSHA384 = com.sun.crypto.provider.HmacCore$HmacSHA384 of com.sun.crypto.provider.HmacCore
  public final HmacSHA512 = com.sun.crypto.provider.HmacCore$HmacSHA512 of com.sun.crypto.provider.HmacCore