http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
public class org.bouncycastle.crypto.digests.SHAKEDigest extends org.bouncycastle.crypto.digests.KeccakDigest implements org.bouncycastle.crypto.Xof
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.crypto.digests.SHAKEDigest
  super_class: org.bouncycastle.crypto.digests.KeccakDigest
{
  private static int checkBitLength(int);
    descriptor: (I)I
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // int bitLength
         0: .line 17
            iload 0 /* bitLength */
            lookupswitch { // 2
                  128: 1
                  256: 1
              default: 2
          }
         1: .line 21
      StackMap locals:
      StackMap stack:
            iload 0 /* bitLength */
            ireturn
         2: .line 23
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "'bitLength' "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            iload 0 /* bitLength */
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            ldc " not supported for SHAKE"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // int bitLength
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    3     0  bitLength  I
    MethodParameters:
           Name  Flags
      bitLength  

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
         0: .line 29
            aload 0 /* this */
            sipush 128
            invokespecial org.bouncycastle.crypto.digests.SHAKEDigest.<init>:(I)V
         1: .line 30
            return
        end local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/bouncycastle/crypto/digests/SHAKEDigest;

  public void <init>(int);
    descriptor: (I)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
        start local 1 // int bitLength
         0: .line 34
            aload 0 /* this */
            iload 1 /* bitLength */
            invokestatic org.bouncycastle.crypto.digests.SHAKEDigest.checkBitLength:(I)I
            invokespecial org.bouncycastle.crypto.digests.KeccakDigest.<init>:(I)V
         1: .line 35
            return
        end local 1 // int bitLength
        end local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    2     0       this  Lorg/bouncycastle/crypto/digests/SHAKEDigest;
            0    2     1  bitLength  I
    MethodParameters:
           Name  Flags
      bitLength  

  public void <init>(org.bouncycastle.crypto.digests.SHAKEDigest);
    descriptor: (Lorg/bouncycastle/crypto/digests/SHAKEDigest;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
        start local 1 // org.bouncycastle.crypto.digests.SHAKEDigest source
         0: .line 38
            aload 0 /* this */
            aload 1 /* source */
            invokespecial org.bouncycastle.crypto.digests.KeccakDigest.<init>:(Lorg/bouncycastle/crypto/digests/KeccakDigest;)V
         1: .line 39
            return
        end local 1 // org.bouncycastle.crypto.digests.SHAKEDigest source
        end local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    2     0    this  Lorg/bouncycastle/crypto/digests/SHAKEDigest;
            0    2     1  source  Lorg/bouncycastle/crypto/digests/SHAKEDigest;
    MethodParameters:
        Name  Flags
      source  

  public java.lang.String getAlgorithmName();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
         0: .line 43
            new java.lang.StringBuilder
            dup
            ldc "SHAKE"
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            getfield org.bouncycastle.crypto.digests.SHAKEDigest.fixedOutputLength:I
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/crypto/digests/SHAKEDigest;

  public int doFinal(byte[], int);
    descriptor: ([BI)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=3
        start local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
        start local 1 // byte[] out
        start local 2 // int outOff
         0: .line 48
            aload 0 /* this */
            aload 1 /* out */
            iload 2 /* outOff */
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.getDigestSize:()I
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.doFinal:([BII)I
            ireturn
        end local 2 // int outOff
        end local 1 // byte[] out
        end local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    1     0    this  Lorg/bouncycastle/crypto/digests/SHAKEDigest;
            0    1     1     out  [B
            0    1     2  outOff  I
    MethodParameters:
        Name  Flags
      out     
      outOff  

  public int doFinal(byte[], int, int);
    descriptor: ([BII)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=5, args_size=4
        start local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
        start local 1 // byte[] out
        start local 2 // int outOff
        start local 3 // int outLen
         0: .line 53
            aload 0 /* this */
            aload 1 /* out */
            iload 2 /* outOff */
            iload 3 /* outLen */
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.doOutput:([BII)I
            istore 4 /* length */
        start local 4 // int length
         1: .line 55
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.reset:()V
         2: .line 57
            iload 4 /* length */
            ireturn
        end local 4 // int length
        end local 3 // int outLen
        end local 2 // int outOff
        end local 1 // byte[] out
        end local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    3     0    this  Lorg/bouncycastle/crypto/digests/SHAKEDigest;
            0    3     1     out  [B
            0    3     2  outOff  I
            0    3     3  outLen  I
            1    3     4  length  I
    MethodParameters:
        Name  Flags
      out     
      outOff  
      outLen  

  public int doOutput(byte[], int, int);
    descriptor: ([BII)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=4, args_size=4
        start local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
        start local 1 // byte[] out
        start local 2 // int outOff
        start local 3 // int outLen
         0: .line 62
            aload 0 /* this */
            getfield org.bouncycastle.crypto.digests.SHAKEDigest.squeezing:Z
            ifne 2
         1: .line 64
            aload 0 /* this */
            bipush 15
            iconst_4
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.absorbBits:(II)V
         2: .line 67
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* out */
            iload 2 /* outOff */
            iload 3 /* outLen */
            i2l
            ldc 8
            lmul
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.squeeze:([BIJ)V
         3: .line 69
            iload 3 /* outLen */
            ireturn
        end local 3 // int outLen
        end local 2 // int outOff
        end local 1 // byte[] out
        end local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lorg/bouncycastle/crypto/digests/SHAKEDigest;
            0    4     1     out  [B
            0    4     2  outOff  I
            0    4     3  outLen  I
    MethodParameters:
        Name  Flags
      out     
      outOff  
      outLen  

  protected int doFinal(byte[], int, byte, int);
    descriptor: ([BIBI)I
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=6, locals=5, args_size=5
        start local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
        start local 1 // byte[] out
        start local 2 // int outOff
        start local 3 // byte partialByte
        start local 4 // int partialBits
         0: .line 77
            aload 0 /* this */
            aload 1 /* out */
            iload 2 /* outOff */
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.getDigestSize:()I
            iload 3 /* partialByte */
            iload 4 /* partialBits */
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.doFinal:([BIIBI)I
            ireturn
        end local 4 // int partialBits
        end local 3 // byte partialByte
        end local 2 // int outOff
        end local 1 // byte[] out
        end local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    1     0         this  Lorg/bouncycastle/crypto/digests/SHAKEDigest;
            0    1     1          out  [B
            0    1     2       outOff  I
            0    1     3  partialByte  B
            0    1     4  partialBits  I
    MethodParameters:
             Name  Flags
      out          
      outOff       
      partialByte  
      partialBits  

  protected int doFinal(byte[], int, int, byte, int);
    descriptor: ([BIIBI)I
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=7, locals=8, args_size=6
        start local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
        start local 1 // byte[] out
        start local 2 // int outOff
        start local 3 // int outLen
        start local 4 // byte partialByte
        start local 5 // int partialBits
         0: .line 85
            iload 5 /* partialBits */
            iflt 1
            iload 5 /* partialBits */
            bipush 7
            if_icmple 2
         1: .line 87
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            ldc "'partialBits' must be in the range [0,7]"
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 90
      StackMap locals:
      StackMap stack:
            iload 4 /* partialByte */
            iconst_1
            iload 5 /* partialBits */
            ishl
            iconst_1
            isub
            iand
            bipush 15
            iload 5 /* partialBits */
            ishl
            ior
            istore 6 /* finalInput */
        start local 6 // int finalInput
         3: .line 91
            iload 5 /* partialBits */
            iconst_4
            iadd
            istore 7 /* finalBits */
        start local 7 // int finalBits
         4: .line 93
            iload 7 /* finalBits */
            bipush 8
            if_icmplt 8
         5: .line 95
            aload 0 /* this */
            iconst_1
            newarray 8
            dup
            iconst_0
            iload 6 /* finalInput */
            i2b
            bastore
            iconst_0
            iconst_1
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.absorb:([BII)V
         6: .line 96
            iinc 7 /* finalBits */ -8
         7: .line 97
            iload 6 /* finalInput */
            bipush 8
            iushr
            istore 6 /* finalInput */
         8: .line 100
      StackMap locals: int int
      StackMap stack:
            iload 7 /* finalBits */
            ifle 10
         9: .line 102
            aload 0 /* this */
            iload 6 /* finalInput */
            iload 7 /* finalBits */
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.absorbBits:(II)V
        10: .line 105
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* out */
            iload 2 /* outOff */
            iload 3 /* outLen */
            i2l
            ldc 8
            lmul
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.squeeze:([BIJ)V
        11: .line 107
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.digests.SHAKEDigest.reset:()V
        12: .line 109
            iload 3 /* outLen */
            ireturn
        end local 7 // int finalBits
        end local 6 // int finalInput
        end local 5 // int partialBits
        end local 4 // byte partialByte
        end local 3 // int outLen
        end local 2 // int outOff
        end local 1 // byte[] out
        end local 0 // org.bouncycastle.crypto.digests.SHAKEDigest this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0   13     0         this  Lorg/bouncycastle/crypto/digests/SHAKEDigest;
            0   13     1          out  [B
            0   13     2       outOff  I
            0   13     3       outLen  I
            0   13     4  partialByte  B
            0   13     5  partialBits  I
            3   13     6   finalInput  I
            4   13     7    finalBits  I
    MethodParameters:
             Name  Flags
      out          
      outOff       
      outLen       
      partialByte  
      partialBits  
}
SourceFile: "SHAKEDigest.java"