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.modes.OFBBlockCipher extends org.bouncycastle.crypto.StreamBlockCipher
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.crypto.modes.OFBBlockCipher
  super_class: org.bouncycastle.crypto.StreamBlockCipher
{
  private int byteCount;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

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

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

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

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

  private final org.bouncycastle.crypto.BlockCipher cipher;
    descriptor: Lorg/bouncycastle/crypto/BlockCipher;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  public void <init>(org.bouncycastle.crypto.BlockCipher, int);
    descriptor: (Lorg/bouncycastle/crypto/BlockCipher;I)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
        start local 1 // org.bouncycastle.crypto.BlockCipher cipher
        start local 2 // int blockSize
         0: .line 34
            aload 0 /* this */
            aload 1 /* cipher */
            invokespecial org.bouncycastle.crypto.StreamBlockCipher.<init>:(Lorg/bouncycastle/crypto/BlockCipher;)V
         1: .line 36
            aload 0 /* this */
            aload 1 /* cipher */
            putfield org.bouncycastle.crypto.modes.OFBBlockCipher.cipher:Lorg/bouncycastle/crypto/BlockCipher;
         2: .line 37
            aload 0 /* this */
            iload 2 /* blockSize */
            bipush 8
            idiv
            putfield org.bouncycastle.crypto.modes.OFBBlockCipher.blockSize:I
         3: .line 39
            aload 0 /* this */
            aload 1 /* cipher */
            invokeinterface org.bouncycastle.crypto.BlockCipher.getBlockSize:()I
            newarray 8
            putfield org.bouncycastle.crypto.modes.OFBBlockCipher.IV:[B
         4: .line 40
            aload 0 /* this */
            aload 1 /* cipher */
            invokeinterface org.bouncycastle.crypto.BlockCipher.getBlockSize:()I
            newarray 8
            putfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbV:[B
         5: .line 41
            aload 0 /* this */
            aload 1 /* cipher */
            invokeinterface org.bouncycastle.crypto.BlockCipher.getBlockSize:()I
            newarray 8
            putfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbOutV:[B
         6: .line 42
            return
        end local 2 // int blockSize
        end local 1 // org.bouncycastle.crypto.BlockCipher cipher
        end local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    7     0       this  Lorg/bouncycastle/crypto/modes/OFBBlockCipher;
            0    7     1     cipher  Lorg/bouncycastle/crypto/BlockCipher;
            0    7     2  blockSize  I
    MethodParameters:
           Name  Flags
      cipher     
      blockSize  

  public void init(boolean, org.bouncycastle.crypto.CipherParameters);
    descriptor: (ZLorg/bouncycastle/crypto/CipherParameters;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=6, args_size=3
        start local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
        start local 1 // boolean encrypting
        start local 2 // org.bouncycastle.crypto.CipherParameters params
         0: .line 60
            aload 2 /* params */
            instanceof org.bouncycastle.crypto.params.ParametersWithIV
            ifeq 16
         1: .line 62
            aload 2 /* params */
            checkcast org.bouncycastle.crypto.params.ParametersWithIV
            astore 3 /* ivParam */
        start local 3 // org.bouncycastle.crypto.params.ParametersWithIV ivParam
         2: .line 63
            aload 3 /* ivParam */
            invokevirtual org.bouncycastle.crypto.params.ParametersWithIV.getIV:()[B
            astore 4 /* iv */
        start local 4 // byte[] iv
         3: .line 65
            aload 4 /* iv */
            arraylength
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.IV:[B
            arraylength
            if_icmpge 11
         4: .line 68
            aload 4 /* iv */
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.IV:[B
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.IV:[B
            arraylength
            aload 4 /* iv */
            arraylength
            isub
            aload 4 /* iv */
            arraylength
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
         5: .line 69
            iconst_0
            istore 5 /* i */
        start local 5 // int i
         6: goto 9
         7: .line 71
      StackMap locals: org.bouncycastle.crypto.params.ParametersWithIV byte[] int
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.IV:[B
            iload 5 /* i */
            iconst_0
            bastore
         8: .line 69
            iinc 5 /* i */ 1
      StackMap locals:
      StackMap stack:
         9: iload 5 /* i */
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.IV:[B
            arraylength
            aload 4 /* iv */
            arraylength
            isub
            if_icmplt 7
        end local 5 // int i
        10: .line 73
            goto 12
        11: .line 76
      StackMap locals:
      StackMap stack:
            aload 4 /* iv */
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.IV:[B
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.IV:[B
            arraylength
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
        12: .line 79
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.modes.OFBBlockCipher.reset:()V
        13: .line 82
            aload 3 /* ivParam */
            invokevirtual org.bouncycastle.crypto.params.ParametersWithIV.getParameters:()Lorg/bouncycastle/crypto/CipherParameters;
            ifnull 19
        14: .line 84
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.cipher:Lorg/bouncycastle/crypto/BlockCipher;
            iconst_1
            aload 3 /* ivParam */
            invokevirtual org.bouncycastle.crypto.params.ParametersWithIV.getParameters:()Lorg/bouncycastle/crypto/CipherParameters;
            invokeinterface org.bouncycastle.crypto.BlockCipher.init:(ZLorg/bouncycastle/crypto/CipherParameters;)V
        end local 4 // byte[] iv
        end local 3 // org.bouncycastle.crypto.params.ParametersWithIV ivParam
        15: .line 86
            goto 19
        16: .line 89
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual org.bouncycastle.crypto.modes.OFBBlockCipher.reset:()V
        17: .line 92
            aload 2 /* params */
            ifnull 19
        18: .line 94
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.cipher:Lorg/bouncycastle/crypto/BlockCipher;
            iconst_1
            aload 2 /* params */
            invokeinterface org.bouncycastle.crypto.BlockCipher.init:(ZLorg/bouncycastle/crypto/CipherParameters;)V
        19: .line 97
      StackMap locals:
      StackMap stack:
            return
        end local 2 // org.bouncycastle.crypto.CipherParameters params
        end local 1 // boolean encrypting
        end local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0   20     0        this  Lorg/bouncycastle/crypto/modes/OFBBlockCipher;
            0   20     1  encrypting  Z
            0   20     2      params  Lorg/bouncycastle/crypto/CipherParameters;
            2   15     3     ivParam  Lorg/bouncycastle/crypto/params/ParametersWithIV;
            3   15     4          iv  [B
            6   10     5           i  I
    Exceptions:
      throws java.lang.IllegalArgumentException
    MethodParameters:
            Name  Flags
      encrypting  
      params      

  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.modes.OFBBlockCipher this
         0: .line 107
            new java.lang.StringBuilder
            dup
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.cipher:Lorg/bouncycastle/crypto/BlockCipher;
            invokeinterface org.bouncycastle.crypto.BlockCipher.getAlgorithmName:()Ljava/lang/String;
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc "/OFB"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.blockSize:I
            bipush 8
            imul
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/crypto/modes/OFBBlockCipher;

  public int getBlockSize();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
         0: .line 118
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.blockSize:I
            ireturn
        end local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/crypto/modes/OFBBlockCipher;

  public int processBlock(byte[], int, byte[], int);
    descriptor: ([BI[BI)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=5, args_size=5
        start local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
        start local 1 // byte[] in
        start local 2 // int inOff
        start local 3 // byte[] out
        start local 4 // int outOff
         0: .line 141
            aload 0 /* this */
            aload 1 /* in */
            iload 2 /* inOff */
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.blockSize:I
            aload 3 /* out */
            iload 4 /* outOff */
            invokevirtual org.bouncycastle.crypto.modes.OFBBlockCipher.processBytes:([BII[BI)I
            pop
         1: .line 143
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.blockSize:I
            ireturn
        end local 4 // int outOff
        end local 3 // byte[] out
        end local 2 // int inOff
        end local 1 // byte[] in
        end local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    2     0    this  Lorg/bouncycastle/crypto/modes/OFBBlockCipher;
            0    2     1      in  [B
            0    2     2   inOff  I
            0    2     3     out  [B
            0    2     4  outOff  I
    Exceptions:
      throws org.bouncycastle.crypto.DataLengthException, java.lang.IllegalStateException
    MethodParameters:
        Name  Flags
      in      
      inOff   
      out     
      outOff  

  public void reset();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
         0: .line 152
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.IV:[B
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbV:[B
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.IV:[B
            arraylength
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
         1: .line 153
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.crypto.modes.OFBBlockCipher.byteCount:I
         2: .line 155
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.cipher:Lorg/bouncycastle/crypto/BlockCipher;
            invokeinterface org.bouncycastle.crypto.BlockCipher.reset:()V
         3: .line 156
            return
        end local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lorg/bouncycastle/crypto/modes/OFBBlockCipher;

  protected byte calculateByte(byte);
    descriptor: (B)B
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=6, locals=3, args_size=2
        start local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
        start local 1 // byte in
         0: .line 161
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.byteCount:I
            ifne 2
         1: .line 163
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.cipher:Lorg/bouncycastle/crypto/BlockCipher;
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbV:[B
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbOutV:[B
            iconst_0
            invokeinterface org.bouncycastle.crypto.BlockCipher.processBlock:([BI[BI)I
            pop
         2: .line 166
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbOutV:[B
            aload 0 /* this */
            dup
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.byteCount:I
            dup_x1
            iconst_1
            iadd
            putfield org.bouncycastle.crypto.modes.OFBBlockCipher.byteCount:I
            baload
            iload 1 /* in */
            ixor
            i2b
            istore 2 /* rv */
        start local 2 // byte rv
         3: .line 168
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.byteCount:I
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.blockSize:I
            if_icmpne 7
         4: .line 170
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.crypto.modes.OFBBlockCipher.byteCount:I
         5: .line 172
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbV:[B
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.blockSize:I
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbV:[B
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbV:[B
            arraylength
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.blockSize:I
            isub
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
         6: .line 173
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbOutV:[B
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbV:[B
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.ofbV:[B
            arraylength
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.blockSize:I
            isub
            aload 0 /* this */
            getfield org.bouncycastle.crypto.modes.OFBBlockCipher.blockSize:I
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
         7: .line 176
      StackMap locals: int
      StackMap stack:
            iload 2 /* rv */
            ireturn
        end local 2 // byte rv
        end local 1 // byte in
        end local 0 // org.bouncycastle.crypto.modes.OFBBlockCipher this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    8     0  this  Lorg/bouncycastle/crypto/modes/OFBBlockCipher;
            0    8     1    in  B
            3    8     2    rv  B
    Exceptions:
      throws org.bouncycastle.crypto.DataLengthException, java.lang.IllegalStateException
    MethodParameters:
      Name  Flags
      in    
}
SourceFile: "OFBBlockCipher.java"