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. 
class org.bouncycastle.est.CTEBase64InputStream extends java.io.InputStream
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.bouncycastle.est.CTEBase64InputStream
  super_class: java.io.InputStream
{
  protected final java.io.InputStream src;
    descriptor: Ljava/io/InputStream;
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL

  protected final byte[] rawBuf;
    descriptor: [B
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL

  protected final byte[] data;
    descriptor: [B
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL

  protected final java.io.OutputStream dataOutputStream;
    descriptor: Ljava/io/OutputStream;
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL

  protected final java.lang.Long max;
    descriptor: Ljava/lang/Long;
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL

  protected int rp;
    descriptor: I
    flags: (0x0004) ACC_PROTECTED

  protected int wp;
    descriptor: I
    flags: (0x0004) ACC_PROTECTED

  protected boolean end;
    descriptor: Z
    flags: (0x0004) ACC_PROTECTED

  protected long read;
    descriptor: J
    flags: (0x0004) ACC_PROTECTED

  public void <init>(java.io.InputStream, java.lang.Long);
    descriptor: (Ljava/io/InputStream;Ljava/lang/Long;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=3
        start local 0 // org.bouncycastle.est.CTEBase64InputStream this
        start local 1 // java.io.InputStream src
        start local 2 // java.lang.Long limit
         0: .line 23
            aload 0 /* this */
            invokespecial java.io.InputStream.<init>:()V
         1: .line 14
            aload 0 /* this */
            sipush 1024
            newarray 8
            putfield org.bouncycastle.est.CTEBase64InputStream.rawBuf:[B
         2: .line 15
            aload 0 /* this */
            sipush 768
            newarray 8
            putfield org.bouncycastle.est.CTEBase64InputStream.data:[B
         3: .line 25
            aload 0 /* this */
            aload 1 /* src */
            putfield org.bouncycastle.est.CTEBase64InputStream.src:Ljava/io/InputStream;
         4: .line 26
            aload 0 /* this */
            new org.bouncycastle.est.CTEBase64InputStream$1
            dup
            aload 0 /* this */
            invokespecial org.bouncycastle.est.CTEBase64InputStream$1.<init>:(Lorg/bouncycastle/est/CTEBase64InputStream;)V
            putfield org.bouncycastle.est.CTEBase64InputStream.dataOutputStream:Ljava/io/OutputStream;
         5: .line 34
            aload 0 /* this */
            aload 2 /* limit */
            putfield org.bouncycastle.est.CTEBase64InputStream.max:Ljava/lang/Long;
         6: .line 35
            return
        end local 2 // java.lang.Long limit
        end local 1 // java.io.InputStream src
        end local 0 // org.bouncycastle.est.CTEBase64InputStream this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    7     0   this  Lorg/bouncycastle/est/CTEBase64InputStream;
            0    7     1    src  Ljava/io/InputStream;
            0    7     2  limit  Ljava/lang/Long;
    MethodParameters:
       Name  Flags
      src    
      limit  

  protected int pullFromSrc();
    descriptor: ()I
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=5, locals=4, args_size=1
        start local 0 // org.bouncycastle.est.CTEBase64InputStream this
         0: .line 43
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.read:J
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.max:Ljava/lang/Long;
            invokevirtual java.lang.Long.longValue:()J
            lcmp
            iflt 2
         1: .line 45
            iconst_m1
            ireturn
         2: .line 48
      StackMap locals:
      StackMap stack:
            iconst_0
            istore 1 /* j */
        start local 1 // int j
         3: .line 49
            iconst_0
            istore 2 /* c */
        start local 2 // int c
         4: .line 52
      StackMap locals: int int
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.src:Ljava/io/InputStream;
            invokevirtual java.io.InputStream.read:()I
            istore 1 /* j */
         5: .line 59
            iload 1 /* j */
            bipush 33
            if_icmpge 6
            iload 1 /* j */
            bipush 13
            if_icmpeq 6
            iload 1 /* j */
            bipush 10
            if_icmpne 11
         6: .line 61
      StackMap locals:
      StackMap stack:
            iload 2 /* c */
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.rawBuf:[B
            arraylength
            if_icmplt 8
         7: .line 63
            new java.io.IOException
            dup
            ldc "Content Transfer Encoding, base64 line length > 1024"
            invokespecial java.io.IOException.<init>:(Ljava/lang/String;)V
            athrow
         8: .line 65
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.rawBuf:[B
            iload 2 /* c */
            iinc 2 /* c */ 1
            iload 1 /* j */
            i2b
            bastore
         9: .line 66
            aload 0 /* this */
            dup
            getfield org.bouncycastle.est.CTEBase64InputStream.read:J
            lconst_1
            ladd
            putfield org.bouncycastle.est.CTEBase64InputStream.read:J
        10: .line 67
            goto 13
        11: .line 68
      StackMap locals:
      StackMap stack:
            iload 1 /* j */
            iflt 13
        12: .line 70
            aload 0 /* this */
            dup
            getfield org.bouncycastle.est.CTEBase64InputStream.read:J
            lconst_1
            ladd
            putfield org.bouncycastle.est.CTEBase64InputStream.read:J
        13: .line 73
      StackMap locals:
      StackMap stack:
            iload 1 /* j */
            iconst_m1
            if_icmple 15
            iload 2 /* c */
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.rawBuf:[B
            arraylength
            if_icmpge 15
            iload 1 /* j */
            bipush 10
            if_icmpeq 15
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.read:J
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.max:Ljava/lang/Long;
            invokevirtual java.lang.Long.longValue:()J
        14: .line 50
            lcmp
            iflt 4
        15: .line 75
      StackMap locals:
      StackMap stack:
            iload 2 /* c */
            ifle 20
        16: .line 79
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.rawBuf:[B
            iconst_0
            iload 2 /* c */
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.dataOutputStream:Ljava/io/OutputStream;
            invokestatic org.bouncycastle.util.encoders.Base64.decode:([BIILjava/io/OutputStream;)I
            pop
        17: .line 80
            goto 22
        18: .line 81
      StackMap locals:
      StackMap stack: java.lang.Exception
            astore 3 /* ex */
        start local 3 // java.lang.Exception ex
        19: .line 83
            new java.io.IOException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Decode Base64 Content-Transfer-Encoding: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 3 /* ex */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.io.IOException.<init>:(Ljava/lang/String;)V
            athrow
        end local 3 // java.lang.Exception ex
        20: .line 88
      StackMap locals:
      StackMap stack:
            iload 1 /* j */
            iconst_m1
            if_icmpne 22
        21: .line 90
            iconst_m1
            ireturn
        22: .line 93
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.wp:I
            ireturn
        end local 2 // int c
        end local 1 // int j
        end local 0 // org.bouncycastle.est.CTEBase64InputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   23     0  this  Lorg/bouncycastle/est/CTEBase64InputStream;
            3   23     1     j  I
            4   23     2     c  I
           19   20     3    ex  Ljava/lang/Exception;
      Exception table:
        from    to  target  type
          16    17      18  Class java.lang.Exception
    Exceptions:
      throws java.io.IOException

  public int read();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=2, args_size=1
        start local 0 // org.bouncycastle.est.CTEBase64InputStream this
         0: .line 100
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.rp:I
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.wp:I
            if_icmpne 6
         1: .line 102
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.est.CTEBase64InputStream.rp:I
         2: .line 103
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.est.CTEBase64InputStream.wp:I
         3: .line 104
            aload 0 /* this */
            invokevirtual org.bouncycastle.est.CTEBase64InputStream.pullFromSrc:()I
            istore 1 /* i */
        start local 1 // int i
         4: .line 105
            iload 1 /* i */
            iconst_m1
            if_icmpne 6
         5: .line 107
            iload 1 /* i */
            ireturn
        end local 1 // int i
         6: .line 110
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.data:[B
            aload 0 /* this */
            dup
            getfield org.bouncycastle.est.CTEBase64InputStream.rp:I
            dup_x1
            iconst_1
            iadd
            putfield org.bouncycastle.est.CTEBase64InputStream.rp:I
            baload
            sipush 255
            iand
            ireturn
        end local 0 // org.bouncycastle.est.CTEBase64InputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lorg/bouncycastle/est/CTEBase64InputStream;
            4    6     1     i  I
    Exceptions:
      throws java.io.IOException

  public void close();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.est.CTEBase64InputStream this
         0: .line 116
            aload 0 /* this */
            getfield org.bouncycastle.est.CTEBase64InputStream.src:Ljava/io/InputStream;
            invokevirtual java.io.InputStream.close:()V
         1: .line 117
            return
        end local 0 // org.bouncycastle.est.CTEBase64InputStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/bouncycastle/est/CTEBase64InputStream;
    Exceptions:
      throws java.io.IOException
}
SourceFile: "CTEBase64InputStream.java"
NestMembers:
  org.bouncycastle.est.CTEBase64InputStream$1
InnerClasses:
  org.bouncycastle.est.CTEBase64InputStream$1