http://www.bouncycastle.org/java.html: The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.
  • The Legion of the Bouncy Castle Inc. 
public class org.bouncycastle.mime.encoding.Base64OutputStream extends java.io.FilterOutputStream
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.mime.encoding.Base64OutputStream
  super_class: java.io.FilterOutputStream
{
  byte[] buffer;
    descriptor: [B
    flags: (0x0000) 

  int bufOff;
    descriptor: I
    flags: (0x0000) 

  public void <init>(java.io.OutputStream);
    descriptor: (Ljava/io/OutputStream;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
        start local 1 // java.io.OutputStream stream
         0: .line 17
            aload 0 /* this */
            aload 1 /* stream */
            invokespecial java.io.FilterOutputStream.<init>:(Ljava/io/OutputStream;)V
         1: .line 12
            aload 0 /* this */
            bipush 54
            newarray 8
            putfield org.bouncycastle.mime.encoding.Base64OutputStream.buffer:[B
         2: .line 18
            return
        end local 1 // java.io.OutputStream stream
        end local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    3     0    this  Lorg/bouncycastle/mime/encoding/Base64OutputStream;
            0    3     1  stream  Ljava/io/OutputStream;
    MethodParameters:
        Name  Flags
      stream  

  public void write(int);
    descriptor: (I)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
        start local 1 // int b
         0: .line 23
            aload 0 /* this */
            iload 1 /* b */
            i2b
            invokevirtual org.bouncycastle.mime.encoding.Base64OutputStream.doWrite:(B)V
         1: .line 24
            return
        end local 1 // int b
        end local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/bouncycastle/mime/encoding/Base64OutputStream;
            0    2     1     b  I
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      b     

  public void write(byte[], int, int);
    descriptor: ([BII)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=5, args_size=4
        start local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
        start local 1 // byte[] buf
        start local 2 // int bufOff
        start local 3 // int len
         0: .line 29
            iconst_0
            istore 4 /* i */
        start local 4 // int i
         1: goto 4
         2: .line 31
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            aload 1 /* buf */
            iload 2 /* bufOff */
            iload 4 /* i */
            iadd
            baload
            invokevirtual org.bouncycastle.mime.encoding.Base64OutputStream.doWrite:(B)V
         3: .line 29
            iinc 4 /* i */ 1
      StackMap locals:
      StackMap stack:
         4: iload 4 /* i */
            iload 3 /* len */
            if_icmpne 2
        end local 4 // int i
         5: .line 33
            return
        end local 3 // int len
        end local 2 // int bufOff
        end local 1 // byte[] buf
        end local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    6     0    this  Lorg/bouncycastle/mime/encoding/Base64OutputStream;
            0    6     1     buf  [B
            0    6     2  bufOff  I
            0    6     3     len  I
            1    5     4       i  I
    Exceptions:
      throws java.io.IOException
    MethodParameters:
        Name  Flags
      buf     
      bufOff  
      len     

  public void write(byte[]);
    descriptor: ([B)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
        start local 1 // byte[] buf
         0: .line 38
            aload 0 /* this */
            aload 1 /* buf */
            iconst_0
            aload 1 /* buf */
            arraylength
            invokevirtual org.bouncycastle.mime.encoding.Base64OutputStream.write:([BII)V
         1: .line 39
            return
        end local 1 // byte[] buf
        end local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/bouncycastle/mime/encoding/Base64OutputStream;
            0    2     1   buf  [B
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      buf   

  public void close();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
         0: .line 44
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.bufOff:I
            ifle 2
         1: .line 46
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.buffer:[B
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.bufOff:I
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.out:Ljava/io/OutputStream;
            invokestatic org.bouncycastle.util.encoders.Base64.encode:([BIILjava/io/OutputStream;)I
            pop
         2: .line 48
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.out:Ljava/io/OutputStream;
            invokevirtual java.io.OutputStream.close:()V
         3: .line 49
            return
        end local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lorg/bouncycastle/mime/encoding/Base64OutputStream;
    Exceptions:
      throws java.io.IOException

  private void doWrite(byte);
    descriptor: (B)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
        start local 1 // byte b
         0: .line 54
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.buffer:[B
            aload 0 /* this */
            dup
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.bufOff:I
            dup_x1
            iconst_1
            iadd
            putfield org.bouncycastle.mime.encoding.Base64OutputStream.bufOff:I
            iload 1 /* b */
            bastore
         1: .line 55
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.bufOff:I
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.buffer:[B
            arraylength
            if_icmpne 6
         2: .line 57
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.buffer:[B
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.buffer:[B
            arraylength
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.out:Ljava/io/OutputStream;
            invokestatic org.bouncycastle.util.encoders.Base64.encode:([BIILjava/io/OutputStream;)I
            pop
         3: .line 58
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.out:Ljava/io/OutputStream;
            bipush 13
            invokevirtual java.io.OutputStream.write:(I)V
         4: .line 59
            aload 0 /* this */
            getfield org.bouncycastle.mime.encoding.Base64OutputStream.out:Ljava/io/OutputStream;
            bipush 10
            invokevirtual java.io.OutputStream.write:(I)V
         5: .line 60
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.mime.encoding.Base64OutputStream.bufOff:I
         6: .line 62
      StackMap locals:
      StackMap stack:
            return
        end local 1 // byte b
        end local 0 // org.bouncycastle.mime.encoding.Base64OutputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lorg/bouncycastle/mime/encoding/Base64OutputStream;
            0    7     1     b  B
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      b     
}
SourceFile: "Base64OutputStream.java"