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.asn1.crmf.POPOSigningKey extends org.bouncycastle.asn1.ASN1Encodable
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.asn1.crmf.POPOSigningKey
  super_class: org.bouncycastle.asn1.ASN1Encodable
{
  private org.bouncycastle.asn1.crmf.POPOSigningKeyInput poposkInput;
    descriptor: Lorg/bouncycastle/asn1/crmf/POPOSigningKeyInput;
    flags: (0x0002) ACC_PRIVATE

  private org.bouncycastle.asn1.x509.AlgorithmIdentifier algorithmIdentifier;
    descriptor: Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    flags: (0x0002) ACC_PRIVATE

  private org.bouncycastle.asn1.DERBitString signature;
    descriptor: Lorg/bouncycastle/asn1/DERBitString;
    flags: (0x0002) ACC_PRIVATE

  private void <init>(org.bouncycastle.asn1.ASN1Sequence);
    descriptor: (Lorg/bouncycastle/asn1/ASN1Sequence;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=4, args_size=2
        start local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
        start local 1 // org.bouncycastle.asn1.ASN1Sequence seq
         0: .line 20
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 22
            iconst_0
            istore 2 /* index */
        start local 2 // int index
         2: .line 24
            aload 1 /* seq */
            iload 2 /* index */
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.getObjectAt:(I)Lorg/bouncycastle/asn1/DEREncodable;
            instanceof org.bouncycastle.asn1.ASN1TaggedObject
            ifeq 10
         3: .line 27
            aload 1 /* seq */
            iload 2 /* index */
            iinc 2 /* index */ 1
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.getObjectAt:(I)Lorg/bouncycastle/asn1/DEREncodable;
            checkcast org.bouncycastle.asn1.ASN1TaggedObject
         4: .line 26
            astore 3 /* tagObj */
        start local 3 // org.bouncycastle.asn1.ASN1TaggedObject tagObj
         5: .line 28
            aload 3 /* tagObj */
            invokevirtual org.bouncycastle.asn1.ASN1TaggedObject.getTagNo:()I
            ifeq 9
         6: .line 30
            new java.lang.IllegalArgumentException
            dup
         7: .line 31
            new java.lang.StringBuilder
            dup
            ldc "Unknown POPOSigningKeyInput tag: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 3 /* tagObj */
            invokevirtual org.bouncycastle.asn1.ASN1TaggedObject.getTagNo:()I
            invokevirtual java.lang.StringBuilder.append:(I)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         8: .line 30
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         9: .line 33
      StackMap locals: org.bouncycastle.asn1.crmf.POPOSigningKey org.bouncycastle.asn1.ASN1Sequence int org.bouncycastle.asn1.ASN1TaggedObject
      StackMap stack:
            aload 0 /* this */
            aload 3 /* tagObj */
            invokevirtual org.bouncycastle.asn1.ASN1TaggedObject.getObject:()Lorg/bouncycastle/asn1/DERObject;
            invokestatic org.bouncycastle.asn1.crmf.POPOSigningKeyInput.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/crmf/POPOSigningKeyInput;
            putfield org.bouncycastle.asn1.crmf.POPOSigningKey.poposkInput:Lorg/bouncycastle/asn1/crmf/POPOSigningKeyInput;
        end local 3 // org.bouncycastle.asn1.ASN1TaggedObject tagObj
        10: .line 35
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* seq */
            iload 2 /* index */
            iinc 2 /* index */ 1
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.getObjectAt:(I)Lorg/bouncycastle/asn1/DEREncodable;
            invokestatic org.bouncycastle.asn1.x509.AlgorithmIdentifier.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            putfield org.bouncycastle.asn1.crmf.POPOSigningKey.algorithmIdentifier:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
        11: .line 36
            aload 0 /* this */
            aload 1 /* seq */
            iload 2 /* index */
            invokevirtual org.bouncycastle.asn1.ASN1Sequence.getObjectAt:(I)Lorg/bouncycastle/asn1/DEREncodable;
            invokestatic org.bouncycastle.asn1.DERBitString.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/DERBitString;
            putfield org.bouncycastle.asn1.crmf.POPOSigningKey.signature:Lorg/bouncycastle/asn1/DERBitString;
        12: .line 37
            return
        end local 2 // int index
        end local 1 // org.bouncycastle.asn1.ASN1Sequence seq
        end local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0   13     0    this  Lorg/bouncycastle/asn1/crmf/POPOSigningKey;
            0   13     1     seq  Lorg/bouncycastle/asn1/ASN1Sequence;
            2   13     2   index  I
            5   10     3  tagObj  Lorg/bouncycastle/asn1/ASN1TaggedObject;
    MethodParameters:
      Name  Flags
      seq   

  public static org.bouncycastle.asn1.crmf.POPOSigningKey getInstance(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Lorg/bouncycastle/asn1/crmf/POPOSigningKey;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // java.lang.Object o
         0: .line 41
            aload 0 /* o */
            instanceof org.bouncycastle.asn1.crmf.POPOSigningKey
            ifeq 2
         1: .line 43
            aload 0 /* o */
            checkcast org.bouncycastle.asn1.crmf.POPOSigningKey
            areturn
         2: .line 46
      StackMap locals:
      StackMap stack:
            aload 0 /* o */
            instanceof org.bouncycastle.asn1.ASN1Sequence
            ifeq 4
         3: .line 48
            new org.bouncycastle.asn1.crmf.POPOSigningKey
            dup
            aload 0 /* o */
            checkcast org.bouncycastle.asn1.ASN1Sequence
            invokespecial org.bouncycastle.asn1.crmf.POPOSigningKey.<init>:(Lorg/bouncycastle/asn1/ASN1Sequence;)V
            areturn
         4: .line 51
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Invalid object: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* o */
            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;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // java.lang.Object o
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0     o  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      o     

  public static org.bouncycastle.asn1.crmf.POPOSigningKey getInstance(org.bouncycastle.asn1.ASN1TaggedObject, boolean);
    descriptor: (Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/crmf/POPOSigningKey;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.ASN1TaggedObject obj
        start local 1 // boolean explicit
         0: .line 56
            aload 0 /* obj */
            iload 1 /* explicit */
            invokestatic org.bouncycastle.asn1.ASN1Sequence.getInstance:(Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/ASN1Sequence;
            invokestatic org.bouncycastle.asn1.crmf.POPOSigningKey.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/crmf/POPOSigningKey;
            areturn
        end local 1 // boolean explicit
        end local 0 // org.bouncycastle.asn1.ASN1TaggedObject obj
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0       obj  Lorg/bouncycastle/asn1/ASN1TaggedObject;
            0    1     1  explicit  Z
    MethodParameters:
          Name  Flags
      obj       
      explicit  

  public void <init>(org.bouncycastle.asn1.crmf.POPOSigningKeyInput, org.bouncycastle.asn1.x509.AlgorithmIdentifier, org.bouncycastle.asn1.DERBitString);
    descriptor: (Lorg/bouncycastle/asn1/crmf/POPOSigningKeyInput;Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Lorg/bouncycastle/asn1/DERBitString;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
        start local 1 // org.bouncycastle.asn1.crmf.POPOSigningKeyInput poposkIn
        start local 2 // org.bouncycastle.asn1.x509.AlgorithmIdentifier aid
        start local 3 // org.bouncycastle.asn1.DERBitString signature
         0: .line 67
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 72
            aload 0 /* this */
            aload 1 /* poposkIn */
            putfield org.bouncycastle.asn1.crmf.POPOSigningKey.poposkInput:Lorg/bouncycastle/asn1/crmf/POPOSigningKeyInput;
         2: .line 73
            aload 0 /* this */
            aload 2 /* aid */
            putfield org.bouncycastle.asn1.crmf.POPOSigningKey.algorithmIdentifier:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
         3: .line 74
            aload 0 /* this */
            aload 3 /* signature */
            putfield org.bouncycastle.asn1.crmf.POPOSigningKey.signature:Lorg/bouncycastle/asn1/DERBitString;
         4: .line 75
            return
        end local 3 // org.bouncycastle.asn1.DERBitString signature
        end local 2 // org.bouncycastle.asn1.x509.AlgorithmIdentifier aid
        end local 1 // org.bouncycastle.asn1.crmf.POPOSigningKeyInput poposkIn
        end local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    5     0       this  Lorg/bouncycastle/asn1/crmf/POPOSigningKey;
            0    5     1   poposkIn  Lorg/bouncycastle/asn1/crmf/POPOSigningKeyInput;
            0    5     2        aid  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            0    5     3  signature  Lorg/bouncycastle/asn1/DERBitString;
    MethodParameters:
           Name  Flags
      poposkIn   
      aid        
      signature  

  public org.bouncycastle.asn1.crmf.POPOSigningKeyInput getPoposkInput();
    descriptor: ()Lorg/bouncycastle/asn1/crmf/POPOSigningKeyInput;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
         0: .line 78
            aload 0 /* this */
            getfield org.bouncycastle.asn1.crmf.POPOSigningKey.poposkInput:Lorg/bouncycastle/asn1/crmf/POPOSigningKeyInput;
            areturn
        end local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/crmf/POPOSigningKey;

  public org.bouncycastle.asn1.x509.AlgorithmIdentifier getAlgorithmIdentifier();
    descriptor: ()Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
         0: .line 82
            aload 0 /* this */
            getfield org.bouncycastle.asn1.crmf.POPOSigningKey.algorithmIdentifier:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            areturn
        end local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/crmf/POPOSigningKey;

  public org.bouncycastle.asn1.DERBitString getSignature();
    descriptor: ()Lorg/bouncycastle/asn1/DERBitString;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
         0: .line 86
            aload 0 /* this */
            getfield org.bouncycastle.asn1.crmf.POPOSigningKey.signature:Lorg/bouncycastle/asn1/DERBitString;
            areturn
        end local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/crmf/POPOSigningKey;

  public org.bouncycastle.asn1.DERObject toASN1Object();
    descriptor: ()Lorg/bouncycastle/asn1/DERObject;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=2, args_size=1
        start local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
         0: .line 110
            new org.bouncycastle.asn1.ASN1EncodableVector
            dup
            invokespecial org.bouncycastle.asn1.ASN1EncodableVector.<init>:()V
            astore 1 /* v */
        start local 1 // org.bouncycastle.asn1.ASN1EncodableVector v
         1: .line 112
            aload 0 /* this */
            getfield org.bouncycastle.asn1.crmf.POPOSigningKey.poposkInput:Lorg/bouncycastle/asn1/crmf/POPOSigningKeyInput;
            ifnull 3
         2: .line 114
            aload 1 /* v */
            new org.bouncycastle.asn1.DERTaggedObject
            dup
            iconst_0
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.asn1.crmf.POPOSigningKey.poposkInput:Lorg/bouncycastle/asn1/crmf/POPOSigningKeyInput;
            invokespecial org.bouncycastle.asn1.DERTaggedObject.<init>:(ZILorg/bouncycastle/asn1/DEREncodable;)V
            invokevirtual org.bouncycastle.asn1.ASN1EncodableVector.add:(Lorg/bouncycastle/asn1/DEREncodable;)V
         3: .line 117
      StackMap locals: org.bouncycastle.asn1.ASN1EncodableVector
      StackMap stack:
            aload 1 /* v */
            aload 0 /* this */
            getfield org.bouncycastle.asn1.crmf.POPOSigningKey.algorithmIdentifier:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            invokevirtual org.bouncycastle.asn1.ASN1EncodableVector.add:(Lorg/bouncycastle/asn1/DEREncodable;)V
         4: .line 118
            aload 1 /* v */
            aload 0 /* this */
            getfield org.bouncycastle.asn1.crmf.POPOSigningKey.signature:Lorg/bouncycastle/asn1/DERBitString;
            invokevirtual org.bouncycastle.asn1.ASN1EncodableVector.add:(Lorg/bouncycastle/asn1/DEREncodable;)V
         5: .line 120
            new org.bouncycastle.asn1.DERSequence
            dup
            aload 1 /* v */
            invokespecial org.bouncycastle.asn1.DERSequence.<init>:(Lorg/bouncycastle/asn1/ASN1EncodableVector;)V
            areturn
        end local 1 // org.bouncycastle.asn1.ASN1EncodableVector v
        end local 0 // org.bouncycastle.asn1.crmf.POPOSigningKey this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lorg/bouncycastle/asn1/crmf/POPOSigningKey;
            1    6     1     v  Lorg/bouncycastle/asn1/ASN1EncodableVector;
}
SourceFile: "POPOSigningKey.java"