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. 
public class org.bouncycastle.crypto.engines.HC256Engine implements org.bouncycastle.crypto.StreamCipher
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.crypto.engines.HC256Engine
  super_class: java.lang.Object
{
  private int[] p;
    descriptor: [I
    flags: (0x0002) ACC_PRIVATE

  private int[] q;
    descriptor: [I
    flags: (0x0002) ACC_PRIVATE

  private int cnt;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

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

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

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

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

  private int idx;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.engines.HC256Engine this
         0: .line 23
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 26
            aload 0 /* this */
            sipush 1024
            newarray 10
            putfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
         2: .line 27
            aload 0 /* this */
            sipush 1024
            newarray 10
            putfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
         3: .line 28
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.crypto.engines.HC256Engine.cnt:I
         4: .line 180
            aload 0 /* this */
            iconst_4
            newarray 8
            putfield org.bouncycastle.crypto.engines.HC256Engine.buf:[B
         5: .line 181
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.crypto.engines.HC256Engine.idx:I
         6: .line 23
            return
        end local 0 // org.bouncycastle.crypto.engines.HC256Engine this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lorg/bouncycastle/crypto/engines/HC256Engine;

  private int step();
    descriptor: ()I
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=7, locals=5, args_size=1
        start local 0 // org.bouncycastle.crypto.engines.HC256Engine this
         0: .line 32
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.cnt:I
            sipush 1023
            iand
            istore 1 /* j */
        start local 1 // int j
         1: .line 34
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.cnt:I
            sipush 1024
            if_icmpge 17
         2: .line 36
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iload 1 /* j */
            iconst_3
            isub
            sipush 1023
            iand
            iaload
            istore 3 /* x */
        start local 3 // int x
         3: .line 37
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iload 1 /* j */
            sipush 1023
            isub
            sipush 1023
            iand
            iaload
            istore 4 /* y */
        start local 4 // int y
         4: .line 38
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iload 1 /* j */
            dup2
            iaload
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iload 1 /* j */
            bipush 10
            isub
            sipush 1023
            iand
            iaload
         5: .line 39
            iload 3 /* x */
            bipush 10
            invokestatic org.bouncycastle.crypto.engines.HC256Engine.rotateRight:(II)I
            iload 4 /* y */
            bipush 23
            invokestatic org.bouncycastle.crypto.engines.HC256Engine.rotateRight:(II)I
            ixor
            iadd
         6: .line 40
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iload 3 /* x */
            iload 4 /* y */
            ixor
            sipush 1023
            iand
            iaload
            iadd
         7: .line 38
            iadd
            iastore
         8: .line 42
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iload 1 /* j */
            bipush 12
            isub
            sipush 1023
            iand
            iaload
            istore 3 /* x */
         9: .line 43
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iload 3 /* x */
            sipush 255
            iand
            iaload
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iload 3 /* x */
            bipush 8
            ishr
            sipush 255
            iand
            sipush 256
            iadd
            iaload
            iadd
        10: .line 44
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iload 3 /* x */
            bipush 16
            ishr
            sipush 255
            iand
            sipush 512
            iadd
            iaload
        11: .line 43
            iadd
        12: .line 44
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iload 3 /* x */
            bipush 24
            ishr
            sipush 255
            iand
            sipush 768
            iadd
            iaload
        13: .line 43
            iadd
        14: .line 45
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iload 1 /* j */
            iaload
        15: .line 43
            ixor
            istore 2 /* ret */
        end local 4 // int y
        end local 3 // int x
        start local 2 // int ret
        16: .line 46
            goto 31
        end local 2 // int ret
        17: .line 49
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iload 1 /* j */
            iconst_3
            isub
            sipush 1023
            iand
            iaload
            istore 3 /* x */
        start local 3 // int x
        18: .line 50
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iload 1 /* j */
            sipush 1023
            isub
            sipush 1023
            iand
            iaload
            istore 4 /* y */
        start local 4 // int y
        19: .line 51
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iload 1 /* j */
            dup2
            iaload
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iload 1 /* j */
            bipush 10
            isub
            sipush 1023
            iand
            iaload
        20: .line 52
            iload 3 /* x */
            bipush 10
            invokestatic org.bouncycastle.crypto.engines.HC256Engine.rotateRight:(II)I
            iload 4 /* y */
            bipush 23
            invokestatic org.bouncycastle.crypto.engines.HC256Engine.rotateRight:(II)I
            ixor
            iadd
        21: .line 53
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iload 3 /* x */
            iload 4 /* y */
            ixor
            sipush 1023
            iand
            iaload
            iadd
        22: .line 51
            iadd
            iastore
        23: .line 55
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iload 1 /* j */
            bipush 12
            isub
            sipush 1023
            iand
            iaload
            istore 3 /* x */
        24: .line 56
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iload 3 /* x */
            sipush 255
            iand
            iaload
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iload 3 /* x */
            bipush 8
            ishr
            sipush 255
            iand
            sipush 256
            iadd
            iaload
            iadd
        25: .line 57
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iload 3 /* x */
            bipush 16
            ishr
            sipush 255
            iand
            sipush 512
            iadd
            iaload
        26: .line 56
            iadd
        27: .line 57
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iload 3 /* x */
            bipush 24
            ishr
            sipush 255
            iand
            sipush 768
            iadd
            iaload
        28: .line 56
            iadd
        29: .line 58
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iload 1 /* j */
            iaload
        30: .line 56
            ixor
            istore 2 /* ret */
        end local 4 // int y
        end local 3 // int x
        start local 2 // int ret
        31: .line 60
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.cnt:I
            iconst_1
            iadd
            sipush 2047
            iand
            putfield org.bouncycastle.crypto.engines.HC256Engine.cnt:I
        32: .line 61
            iload 2 /* ret */
            ireturn
        end local 2 // int ret
        end local 1 // int j
        end local 0 // org.bouncycastle.crypto.engines.HC256Engine this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   33     0  this  Lorg/bouncycastle/crypto/engines/HC256Engine;
            1   33     1     j  I
           16   17     2   ret  I
           31   33     2   ret  I
            3   16     3     x  I
            4   16     4     y  I
           18   31     3     x  I
           19   31     4     y  I

  private void init();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=7, locals=5, args_size=1
        start local 0 // org.bouncycastle.crypto.engines.HC256Engine this
         0: .line 69
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.key:[B
            arraylength
            bipush 32
            if_icmpeq 4
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.key:[B
            arraylength
            bipush 16
            if_icmpeq 4
         1: .line 71
            new java.lang.IllegalArgumentException
            dup
         2: .line 72
            ldc "The key must be 128/256 bits long"
         3: .line 71
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 75
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.iv:[B
            arraylength
            bipush 16
            if_icmpge 8
         5: .line 77
            new java.lang.IllegalArgumentException
            dup
         6: .line 78
            ldc "The IV must be at least 128 bits long"
         7: .line 77
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         8: .line 81
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.key:[B
            arraylength
            bipush 32
            if_icmpeq 13
         9: .line 83
            bipush 32
            newarray 8
            astore 1 /* k */
        start local 1 // byte[] k
        10: .line 85
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.key:[B
            iconst_0
            aload 1 /* k */
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.key:[B
            arraylength
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        11: .line 86
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.key:[B
            iconst_0
            aload 1 /* k */
            bipush 16
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.key:[B
            arraylength
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        12: .line 88
            aload 0 /* this */
            aload 1 /* k */
            putfield org.bouncycastle.crypto.engines.HC256Engine.key:[B
        end local 1 // byte[] k
        13: .line 91
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.iv:[B
            arraylength
            bipush 32
            if_icmpge 18
        14: .line 93
            bipush 32
            newarray 8
            astore 1 /* newIV */
        start local 1 // byte[] newIV
        15: .line 95
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.iv:[B
            iconst_0
            aload 1 /* newIV */
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.iv:[B
            arraylength
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        16: .line 96
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.iv:[B
            iconst_0
            aload 1 /* newIV */
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.iv:[B
            arraylength
            aload 1 /* newIV */
            arraylength
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.iv:[B
            arraylength
            isub
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        17: .line 98
            aload 0 /* this */
            aload 1 /* newIV */
            putfield org.bouncycastle.crypto.engines.HC256Engine.iv:[B
        end local 1 // byte[] newIV
        18: .line 101
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.crypto.engines.HC256Engine.cnt:I
        19: .line 103
            sipush 2560
            newarray 10
            astore 1 /* w */
        start local 1 // int[] w
        20: .line 105
            iconst_0
            istore 2 /* i */
        start local 2 // int i
        21: goto 24
        22: .line 107
      StackMap locals: int[] int
      StackMap stack:
            aload 1 /* w */
            iload 2 /* i */
            iconst_2
            ishr
            dup2
            iaload
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.key:[B
            iload 2 /* i */
            baload
            sipush 255
            iand
            bipush 8
            iload 2 /* i */
            iconst_3
            iand
            imul
            ishl
            ior
            iastore
        23: .line 105
            iinc 2 /* i */ 1
      StackMap locals:
      StackMap stack:
        24: iload 2 /* i */
            bipush 32
            if_icmplt 22
        end local 2 // int i
        25: .line 110
            iconst_0
            istore 2 /* i */
        start local 2 // int i
        26: goto 29
        27: .line 112
      StackMap locals:
      StackMap stack:
            aload 1 /* w */
            iload 2 /* i */
            iconst_2
            ishr
            bipush 8
            iadd
            dup2
            iaload
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.iv:[B
            iload 2 /* i */
            baload
            sipush 255
            iand
            bipush 8
            iload 2 /* i */
            iconst_3
            iand
            imul
            ishl
            ior
            iastore
        28: .line 110
            iinc 2 /* i */ 1
      StackMap locals:
      StackMap stack:
        29: iload 2 /* i */
            bipush 32
            if_icmplt 27
        end local 2 // int i
        30: .line 115
            bipush 16
            istore 2 /* i */
        start local 2 // int i
        31: goto 40
        32: .line 117
      StackMap locals:
      StackMap stack:
            aload 1 /* w */
            iload 2 /* i */
            iconst_2
            isub
            iaload
            istore 3 /* x */
        start local 3 // int x
        33: .line 118
            aload 1 /* w */
            iload 2 /* i */
            bipush 15
            isub
            iaload
            istore 4 /* y */
        start local 4 // int y
        34: .line 119
            aload 1 /* w */
            iload 2 /* i */
            iload 3 /* x */
            bipush 17
            invokestatic org.bouncycastle.crypto.engines.HC256Engine.rotateRight:(II)I
            iload 3 /* x */
            bipush 19
            invokestatic org.bouncycastle.crypto.engines.HC256Engine.rotateRight:(II)I
            ixor
            iload 3 /* x */
            bipush 10
            iushr
            ixor
        35: .line 120
            aload 1 /* w */
            iload 2 /* i */
            bipush 7
            isub
            iaload
            iadd
        36: .line 121
            iload 4 /* y */
            bipush 7
            invokestatic org.bouncycastle.crypto.engines.HC256Engine.rotateRight:(II)I
            iload 4 /* y */
            bipush 18
            invokestatic org.bouncycastle.crypto.engines.HC256Engine.rotateRight:(II)I
            ixor
            iload 4 /* y */
            iconst_3
            iushr
            ixor
            iadd
        37: .line 122
            aload 1 /* w */
            iload 2 /* i */
            bipush 16
            isub
            iaload
            iadd
            iload 2 /* i */
            iadd
        38: .line 119
            iastore
        end local 4 // int y
        end local 3 // int x
        39: .line 115
            iinc 2 /* i */ 1
      StackMap locals:
      StackMap stack:
        40: iload 2 /* i */
            sipush 2560
            if_icmplt 32
        end local 2 // int i
        41: .line 125
            aload 1 /* w */
            sipush 512
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.p:[I
            iconst_0
            sipush 1024
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        42: .line 126
            aload 1 /* w */
            sipush 1536
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.q:[I
            iconst_0
            sipush 1024
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        43: .line 128
            iconst_0
            istore 2 /* i */
        start local 2 // int i
        44: goto 47
        45: .line 130
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.engines.HC256Engine.step:()I
            pop
        46: .line 128
            iinc 2 /* i */ 1
      StackMap locals:
      StackMap stack:
        47: iload 2 /* i */
            sipush 4096
            if_icmplt 45
        end local 2 // int i
        48: .line 133
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.crypto.engines.HC256Engine.cnt:I
        49: .line 134
            return
        end local 1 // int[] w
        end local 0 // org.bouncycastle.crypto.engines.HC256Engine this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0   50     0   this  Lorg/bouncycastle/crypto/engines/HC256Engine;
           10   13     1      k  [B
           15   18     1  newIV  [B
           20   50     1      w  [I
           21   25     2      i  I
           26   30     2      i  I
           31   41     2      i  I
           33   39     3      x  I
           34   39     4      y  I
           44   48     2      i  I

  public java.lang.String getAlgorithmName();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.engines.HC256Engine this
         0: .line 138
            ldc "HC-256"
            areturn
        end local 0 // org.bouncycastle.crypto.engines.HC256Engine this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/crypto/engines/HC256Engine;

  public void init(boolean, org.bouncycastle.crypto.CipherParameters);
    descriptor: (ZLorg/bouncycastle/crypto/CipherParameters;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=4, args_size=3
        start local 0 // org.bouncycastle.crypto.engines.HC256Engine this
        start local 1 // boolean forEncryption
        start local 2 // org.bouncycastle.crypto.CipherParameters params
         0: .line 153
            aload 2 /* params */
            astore 3 /* keyParam */
        start local 3 // org.bouncycastle.crypto.CipherParameters keyParam
         1: .line 155
            aload 2 /* params */
            instanceof org.bouncycastle.crypto.params.ParametersWithIV
            ifeq 5
         2: .line 157
            aload 0 /* this */
            aload 2 /* params */
            checkcast org.bouncycastle.crypto.params.ParametersWithIV
            invokevirtual org.bouncycastle.crypto.params.ParametersWithIV.getIV:()[B
            putfield org.bouncycastle.crypto.engines.HC256Engine.iv:[B
         3: .line 158
            aload 2 /* params */
            checkcast org.bouncycastle.crypto.params.ParametersWithIV
            invokevirtual org.bouncycastle.crypto.params.ParametersWithIV.getParameters:()Lorg/bouncycastle/crypto/CipherParameters;
            astore 3 /* keyParam */
         4: .line 159
            goto 6
         5: .line 162
      StackMap locals: org.bouncycastle.crypto.CipherParameters
      StackMap stack:
            aload 0 /* this */
            iconst_0
            newarray 8
            putfield org.bouncycastle.crypto.engines.HC256Engine.iv:[B
         6: .line 165
      StackMap locals:
      StackMap stack:
            aload 3 /* keyParam */
            instanceof org.bouncycastle.crypto.params.KeyParameter
            ifeq 10
         7: .line 167
            aload 0 /* this */
            aload 3 /* keyParam */
            checkcast org.bouncycastle.crypto.params.KeyParameter
            invokevirtual org.bouncycastle.crypto.params.KeyParameter.getKey:()[B
            putfield org.bouncycastle.crypto.engines.HC256Engine.key:[B
         8: .line 168
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.engines.HC256Engine.init:()V
         9: .line 169
            goto 15
        10: .line 172
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
        11: .line 173
            new java.lang.StringBuilder
            dup
            ldc "Invalid parameter passed to HC256 init - "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
        12: .line 174
            aload 2 /* params */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        13: .line 173
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
        14: .line 172
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        15: .line 177
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            iconst_1
            putfield org.bouncycastle.crypto.engines.HC256Engine.initialised:Z
        16: .line 178
            return
        end local 3 // org.bouncycastle.crypto.CipherParameters keyParam
        end local 2 // org.bouncycastle.crypto.CipherParameters params
        end local 1 // boolean forEncryption
        end local 0 // org.bouncycastle.crypto.engines.HC256Engine this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   17     0           this  Lorg/bouncycastle/crypto/engines/HC256Engine;
            0   17     1  forEncryption  Z
            0   17     2         params  Lorg/bouncycastle/crypto/CipherParameters;
            1   17     3       keyParam  Lorg/bouncycastle/crypto/CipherParameters;
    Exceptions:
      throws java.lang.IllegalArgumentException
    MethodParameters:
               Name  Flags
      forEncryption  
      params         

  private byte getByte();
    descriptor: ()B
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=4, locals=2, args_size=1
        start local 0 // org.bouncycastle.crypto.engines.HC256Engine this
         0: .line 185
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.idx:I
            ifne 9
         1: .line 187
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.engines.HC256Engine.step:()I
            istore 1 /* step */
        start local 1 // int step
         2: .line 188
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.buf:[B
            iconst_0
            iload 1 /* step */
            sipush 255
            iand
            i2b
            bastore
         3: .line 189
            iload 1 /* step */
            bipush 8
            ishr
            istore 1 /* step */
         4: .line 190
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.buf:[B
            iconst_1
            iload 1 /* step */
            sipush 255
            iand
            i2b
            bastore
         5: .line 191
            iload 1 /* step */
            bipush 8
            ishr
            istore 1 /* step */
         6: .line 192
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.buf:[B
            iconst_2
            iload 1 /* step */
            sipush 255
            iand
            i2b
            bastore
         7: .line 193
            iload 1 /* step */
            bipush 8
            ishr
            istore 1 /* step */
         8: .line 194
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.buf:[B
            iconst_3
            iload 1 /* step */
            sipush 255
            iand
            i2b
            bastore
        end local 1 // int step
         9: .line 196
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.buf:[B
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.idx:I
            baload
            istore 1 /* ret */
        start local 1 // byte ret
        10: .line 197
            aload 0 /* this */
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.idx:I
            iconst_1
            iadd
            iconst_3
            iand
            putfield org.bouncycastle.crypto.engines.HC256Engine.idx:I
        11: .line 198
            iload 1 /* ret */
            ireturn
        end local 1 // byte ret
        end local 0 // org.bouncycastle.crypto.engines.HC256Engine this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   12     0  this  Lorg/bouncycastle/crypto/engines/HC256Engine;
            2    9     1  step  I
           10   12     1   ret  B

  public void processBytes(byte[], int, int, byte[], int);
    descriptor: ([BII[BI)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=7, args_size=6
        start local 0 // org.bouncycastle.crypto.engines.HC256Engine this
        start local 1 // byte[] in
        start local 2 // int inOff
        start local 3 // int len
        start local 4 // byte[] out
        start local 5 // int outOff
         0: .line 204
            aload 0 /* this */
            getfield org.bouncycastle.crypto.engines.HC256Engine.initialised:Z
            ifne 4
         1: .line 206
            new java.lang.IllegalStateException
            dup
            new java.lang.StringBuilder
            dup
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.engines.HC256Engine.getAlgorithmName:()Ljava/lang/String;
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
         2: .line 207
            ldc " not initialised"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         3: .line 206
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 210
      StackMap locals:
      StackMap stack:
            iload 2 /* inOff */
            iload 3 /* len */
            iadd
            aload 1 /* in */
            arraylength
            if_icmple 6
         5: .line 212
            new org.bouncycastle.crypto.DataLengthException
            dup
            ldc "input buffer too short"
            invokespecial org.bouncycastle.crypto.DataLengthException.<init>:(Ljava/lang/String;)V
            athrow
         6: .line 215
      StackMap locals:
      StackMap stack:
            iload 5 /* outOff */
            iload 3 /* len */
            iadd
            aload 4 /* out */
            arraylength
            if_icmple 8
         7: .line 217
            new org.bouncycastle.crypto.DataLengthException
            dup
            ldc "output buffer too short"
            invokespecial org.bouncycastle.crypto.DataLengthException.<init>:(Ljava/lang/String;)V
            athrow
         8: .line 220
      StackMap locals:
      StackMap stack:
            iconst_0
            istore 6 /* i */
        start local 6 // int i
         9: goto 12
        10: .line 222
      StackMap locals: int
      StackMap stack:
            aload 4 /* out */
            iload 5 /* outOff */
            iload 6 /* i */
            iadd
            aload 1 /* in */
            iload 2 /* inOff */
            iload 6 /* i */
            iadd
            baload
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.engines.HC256Engine.getByte:()B
            ixor
            i2b
            bastore
        11: .line 220
            iinc 6 /* i */ 1
      StackMap locals:
      StackMap stack:
        12: iload 6 /* i */
            iload 3 /* len */
            if_icmplt 10
        end local 6 // int i
        13: .line 224
            return
        end local 5 // int outOff
        end local 4 // byte[] out
        end local 3 // int len
        end local 2 // int inOff
        end local 1 // byte[] in
        end local 0 // org.bouncycastle.crypto.engines.HC256Engine this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0   14     0    this  Lorg/bouncycastle/crypto/engines/HC256Engine;
            0   14     1      in  [B
            0   14     2   inOff  I
            0   14     3     len  I
            0   14     4     out  [B
            0   14     5  outOff  I
            9   13     6       i  I
    Exceptions:
      throws org.bouncycastle.crypto.DataLengthException
    MethodParameters:
        Name  Flags
      in      
      inOff   
      len     
      out     
      outOff  

  public void reset();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.engines.HC256Engine this
         0: .line 228
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.crypto.engines.HC256Engine.idx:I
         1: .line 229
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.engines.HC256Engine.init:()V
         2: .line 230
            return
        end local 0 // org.bouncycastle.crypto.engines.HC256Engine this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/bouncycastle/crypto/engines/HC256Engine;

  public byte returnByte(byte);
    descriptor: (B)B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.crypto.engines.HC256Engine this
        start local 1 // byte in
         0: .line 234
            iload 1 /* in */
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.engines.HC256Engine.getByte:()B
            ixor
            i2b
            ireturn
        end local 1 // byte in
        end local 0 // org.bouncycastle.crypto.engines.HC256Engine this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/crypto/engines/HC256Engine;
            0    1     1    in  B
    MethodParameters:
      Name  Flags
      in    

  private static int rotateRight(int, int);
    descriptor: (II)I
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // int x
        start local 1 // int bits
         0: .line 241
            iload 0 /* x */
            iload 1 /* bits */
            iushr
            iload 0 /* x */
            iload 1 /* bits */
            ineg
            ishl
            ior
            ireturn
        end local 1 // int bits
        end local 0 // int x
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0     x  I
            0    1     1  bits  I
    MethodParameters:
      Name  Flags
      x     
      bits  
}
SourceFile: "HC256Engine.java"