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. 
class org.bouncycastle.asn1.ConstructedOctetStream extends java.io.InputStream
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.bouncycastle.asn1.ConstructedOctetStream
  super_class: java.io.InputStream
{
  private final org.bouncycastle.asn1.ASN1StreamParser _parser;
    descriptor: Lorg/bouncycastle/asn1/ASN1StreamParser;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

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

  private java.io.InputStream _currentStream;
    descriptor: Ljava/io/InputStream;
    flags: (0x0002) ACC_PRIVATE

  void <init>(org.bouncycastle.asn1.ASN1StreamParser);
    descriptor: (Lorg/bouncycastle/asn1/ASN1StreamParser;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.ConstructedOctetStream this
        start local 1 // org.bouncycastle.asn1.ASN1StreamParser parser
         0: .line 14
            aload 0 /* this */
            invokespecial java.io.InputStream.<init>:()V
         1: .line 11
            aload 0 /* this */
            iconst_1
            putfield org.bouncycastle.asn1.ConstructedOctetStream._first:Z
         2: .line 17
            aload 0 /* this */
            aload 1 /* parser */
            putfield org.bouncycastle.asn1.ConstructedOctetStream._parser:Lorg/bouncycastle/asn1/ASN1StreamParser;
         3: .line 18
            return
        end local 1 // org.bouncycastle.asn1.ASN1StreamParser parser
        end local 0 // org.bouncycastle.asn1.ConstructedOctetStream this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lorg/bouncycastle/asn1/ConstructedOctetStream;
            0    4     1  parser  Lorg/bouncycastle/asn1/ASN1StreamParser;
    MethodParameters:
        Name  Flags
      parser  

  public int read(byte[], int, int);
    descriptor: ([BII)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=7, args_size=4
        start local 0 // org.bouncycastle.asn1.ConstructedOctetStream this
        start local 1 // byte[] b
        start local 2 // int off
        start local 3 // int len
         0: .line 22
            aload 0 /* this */
            getfield org.bouncycastle.asn1.ConstructedOctetStream._currentStream:Ljava/io/InputStream;
            ifnonnull 8
         1: .line 24
            aload 0 /* this */
            getfield org.bouncycastle.asn1.ConstructedOctetStream._first:Z
            ifne 3
         2: .line 26
            iconst_m1
            ireturn
         3: .line 29
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.asn1.ConstructedOctetStream._parser:Lorg/bouncycastle/asn1/ASN1StreamParser;
            invokevirtual org.bouncycastle.asn1.ASN1StreamParser.readObject:()Lorg/bouncycastle/asn1/DEREncodable;
            checkcast org.bouncycastle.asn1.ASN1OctetStringParser
            astore 4 /* s */
        start local 4 // org.bouncycastle.asn1.ASN1OctetStringParser s
         4: .line 31
            aload 4 /* s */
            ifnonnull 6
         5: .line 33
            iconst_m1
            ireturn
         6: .line 36
      StackMap locals: org.bouncycastle.asn1.ASN1OctetStringParser
      StackMap stack:
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.asn1.ConstructedOctetStream._first:Z
         7: .line 37
            aload 0 /* this */
            aload 4 /* s */
            invokeinterface org.bouncycastle.asn1.ASN1OctetStringParser.getOctetStream:()Ljava/io/InputStream;
            putfield org.bouncycastle.asn1.ConstructedOctetStream._currentStream:Ljava/io/InputStream;
        end local 4 // org.bouncycastle.asn1.ASN1OctetStringParser s
         8: .line 40
      StackMap locals:
      StackMap stack:
            iconst_0
            istore 4 /* totalRead */
        start local 4 // int totalRead
         9: .line 44
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.asn1.ConstructedOctetStream._currentStream:Ljava/io/InputStream;
            aload 1 /* b */
            iload 2 /* off */
            iload 4 /* totalRead */
            iadd
            iload 3 /* len */
            iload 4 /* totalRead */
            isub
            invokevirtual java.io.InputStream.read:([BII)I
            istore 5 /* numRead */
        start local 5 // int numRead
        10: .line 46
            iload 5 /* numRead */
            iflt 14
        11: .line 48
            iload 4 /* totalRead */
            iload 5 /* numRead */
            iadd
            istore 4 /* totalRead */
        12: .line 50
            iload 4 /* totalRead */
            iload 3 /* len */
            if_icmpne 9
        13: .line 52
            iload 4 /* totalRead */
            ireturn
        14: .line 57
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.asn1.ConstructedOctetStream._parser:Lorg/bouncycastle/asn1/ASN1StreamParser;
            invokevirtual org.bouncycastle.asn1.ASN1StreamParser.readObject:()Lorg/bouncycastle/asn1/DEREncodable;
            checkcast org.bouncycastle.asn1.ASN1OctetStringParser
            astore 6 /* aos */
        start local 6 // org.bouncycastle.asn1.ASN1OctetStringParser aos
        15: .line 59
            aload 6 /* aos */
            ifnonnull 20
        16: .line 61
            aload 0 /* this */
            aconst_null
            putfield org.bouncycastle.asn1.ConstructedOctetStream._currentStream:Ljava/io/InputStream;
        17: .line 62
            iload 4 /* totalRead */
            iconst_1
            if_icmpge 18
            iconst_m1
            goto 19
      StackMap locals: org.bouncycastle.asn1.ASN1OctetStringParser
      StackMap stack:
        18: iload 4 /* totalRead */
      StackMap locals:
      StackMap stack: int
        19: ireturn
        20: .line 65
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 6 /* aos */
            invokeinterface org.bouncycastle.asn1.ASN1OctetStringParser.getOctetStream:()Ljava/io/InputStream;
            putfield org.bouncycastle.asn1.ConstructedOctetStream._currentStream:Ljava/io/InputStream;
        end local 6 // org.bouncycastle.asn1.ASN1OctetStringParser aos
        end local 5 // int numRead
        21: .line 42
            goto 9
        end local 4 // int totalRead
        end local 3 // int len
        end local 2 // int off
        end local 1 // byte[] b
        end local 0 // org.bouncycastle.asn1.ConstructedOctetStream this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0   22     0       this  Lorg/bouncycastle/asn1/ConstructedOctetStream;
            0   22     1          b  [B
            0   22     2        off  I
            0   22     3        len  I
            4    8     4          s  Lorg/bouncycastle/asn1/ASN1OctetStringParser;
            9   22     4  totalRead  I
           10   21     5    numRead  I
           15   21     6        aos  Lorg/bouncycastle/asn1/ASN1OctetStringParser;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      b     
      off   
      len   

  public int read();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=1
        start local 0 // org.bouncycastle.asn1.ConstructedOctetStream this
         0: .line 73
            aload 0 /* this */
            getfield org.bouncycastle.asn1.ConstructedOctetStream._currentStream:Ljava/io/InputStream;
            ifnonnull 8
         1: .line 75
            aload 0 /* this */
            getfield org.bouncycastle.asn1.ConstructedOctetStream._first:Z
            ifne 3
         2: .line 77
            iconst_m1
            ireturn
         3: .line 80
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.asn1.ConstructedOctetStream._parser:Lorg/bouncycastle/asn1/ASN1StreamParser;
            invokevirtual org.bouncycastle.asn1.ASN1StreamParser.readObject:()Lorg/bouncycastle/asn1/DEREncodable;
            checkcast org.bouncycastle.asn1.ASN1OctetStringParser
            astore 1 /* s */
        start local 1 // org.bouncycastle.asn1.ASN1OctetStringParser s
         4: .line 82
            aload 1 /* s */
            ifnonnull 6
         5: .line 84
            iconst_m1
            ireturn
         6: .line 87
      StackMap locals: org.bouncycastle.asn1.ASN1OctetStringParser
      StackMap stack:
            aload 0 /* this */
            iconst_0
            putfield org.bouncycastle.asn1.ConstructedOctetStream._first:Z
         7: .line 88
            aload 0 /* this */
            aload 1 /* s */
            invokeinterface org.bouncycastle.asn1.ASN1OctetStringParser.getOctetStream:()Ljava/io/InputStream;
            putfield org.bouncycastle.asn1.ConstructedOctetStream._currentStream:Ljava/io/InputStream;
        end local 1 // org.bouncycastle.asn1.ASN1OctetStringParser s
         8: .line 93
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.asn1.ConstructedOctetStream._currentStream:Ljava/io/InputStream;
            invokevirtual java.io.InputStream.read:()I
            istore 1 /* b */
        start local 1 // int b
         9: .line 95
            iload 1 /* b */
            iflt 11
        10: .line 97
            iload 1 /* b */
            ireturn
        11: .line 100
      StackMap locals: int
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.asn1.ConstructedOctetStream._parser:Lorg/bouncycastle/asn1/ASN1StreamParser;
            invokevirtual org.bouncycastle.asn1.ASN1StreamParser.readObject:()Lorg/bouncycastle/asn1/DEREncodable;
            checkcast org.bouncycastle.asn1.ASN1OctetStringParser
            astore 2 /* s */
        start local 2 // org.bouncycastle.asn1.ASN1OctetStringParser s
        12: .line 102
            aload 2 /* s */
            ifnonnull 15
        13: .line 104
            aload 0 /* this */
            aconst_null
            putfield org.bouncycastle.asn1.ConstructedOctetStream._currentStream:Ljava/io/InputStream;
        14: .line 105
            iconst_m1
            ireturn
        15: .line 108
      StackMap locals: org.bouncycastle.asn1.ASN1OctetStringParser
      StackMap stack:
            aload 0 /* this */
            aload 2 /* s */
            invokeinterface org.bouncycastle.asn1.ASN1OctetStringParser.getOctetStream:()Ljava/io/InputStream;
            putfield org.bouncycastle.asn1.ConstructedOctetStream._currentStream:Ljava/io/InputStream;
        end local 2 // org.bouncycastle.asn1.ASN1OctetStringParser s
        end local 1 // int b
        16: .line 91
            goto 8
        end local 0 // org.bouncycastle.asn1.ConstructedOctetStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   17     0  this  Lorg/bouncycastle/asn1/ConstructedOctetStream;
            4    8     1     s  Lorg/bouncycastle/asn1/ASN1OctetStringParser;
            9   16     1     b  I
           12   16     2     s  Lorg/bouncycastle/asn1/ASN1OctetStringParser;
    Exceptions:
      throws java.io.IOException
}
SourceFile: "ConstructedOctetStream.java"