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.cms.SignerIdentifier extends org.bouncycastle.asn1.ASN1Encodable implements org.bouncycastle.asn1.ASN1Choice
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.asn1.cms.SignerIdentifier
  super_class: org.bouncycastle.asn1.ASN1Encodable
{
  private org.bouncycastle.asn1.DEREncodable id;
    descriptor: Lorg/bouncycastle/asn1/DEREncodable;
    flags: (0x0002) ACC_PRIVATE

  public void <init>(org.bouncycastle.asn1.cms.IssuerAndSerialNumber);
    descriptor: (Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
        start local 1 // org.bouncycastle.asn1.cms.IssuerAndSerialNumber id
         0: .line 17
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 20
            aload 0 /* this */
            aload 1 /* id */
            putfield org.bouncycastle.asn1.cms.SignerIdentifier.id:Lorg/bouncycastle/asn1/DEREncodable;
         2: .line 21
            return
        end local 1 // org.bouncycastle.asn1.cms.IssuerAndSerialNumber id
        end local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/bouncycastle/asn1/cms/SignerIdentifier;
            0    3     1    id  Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;
    MethodParameters:
      Name  Flags
      id    

  public void <init>(org.bouncycastle.asn1.ASN1OctetString);
    descriptor: (Lorg/bouncycastle/asn1/ASN1OctetString;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
        start local 1 // org.bouncycastle.asn1.ASN1OctetString id
         0: .line 23
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 26
            aload 0 /* this */
            new org.bouncycastle.asn1.DERTaggedObject
            dup
            iconst_0
            iconst_0
            aload 1 /* id */
            invokespecial org.bouncycastle.asn1.DERTaggedObject.<init>:(ZILorg/bouncycastle/asn1/DEREncodable;)V
            putfield org.bouncycastle.asn1.cms.SignerIdentifier.id:Lorg/bouncycastle/asn1/DEREncodable;
         2: .line 27
            return
        end local 1 // org.bouncycastle.asn1.ASN1OctetString id
        end local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/bouncycastle/asn1/cms/SignerIdentifier;
            0    3     1    id  Lorg/bouncycastle/asn1/ASN1OctetString;
    MethodParameters:
      Name  Flags
      id    

  public void <init>(org.bouncycastle.asn1.DERObject);
    descriptor: (Lorg/bouncycastle/asn1/DERObject;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
        start local 1 // org.bouncycastle.asn1.DERObject id
         0: .line 29
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 32
            aload 0 /* this */
            aload 1 /* id */
            putfield org.bouncycastle.asn1.cms.SignerIdentifier.id:Lorg/bouncycastle/asn1/DEREncodable;
         2: .line 33
            return
        end local 1 // org.bouncycastle.asn1.DERObject id
        end local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/bouncycastle/asn1/cms/SignerIdentifier;
            0    3     1    id  Lorg/bouncycastle/asn1/DERObject;
    MethodParameters:
      Name  Flags
      id    

  public static org.bouncycastle.asn1.cms.SignerIdentifier getInstance(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Lorg/bouncycastle/asn1/cms/SignerIdentifier;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // java.lang.Object o
         0: .line 44
            aload 0 /* o */
            ifnull 1
            aload 0 /* o */
            instanceof org.bouncycastle.asn1.cms.SignerIdentifier
            ifeq 2
         1: .line 46
      StackMap locals:
      StackMap stack:
            aload 0 /* o */
            checkcast org.bouncycastle.asn1.cms.SignerIdentifier
            areturn
         2: .line 49
      StackMap locals:
      StackMap stack:
            aload 0 /* o */
            instanceof org.bouncycastle.asn1.cms.IssuerAndSerialNumber
            ifeq 4
         3: .line 51
            new org.bouncycastle.asn1.cms.SignerIdentifier
            dup
            aload 0 /* o */
            checkcast org.bouncycastle.asn1.cms.IssuerAndSerialNumber
            invokespecial org.bouncycastle.asn1.cms.SignerIdentifier.<init>:(Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;)V
            areturn
         4: .line 54
      StackMap locals:
      StackMap stack:
            aload 0 /* o */
            instanceof org.bouncycastle.asn1.ASN1OctetString
            ifeq 6
         5: .line 56
            new org.bouncycastle.asn1.cms.SignerIdentifier
            dup
            aload 0 /* o */
            checkcast org.bouncycastle.asn1.ASN1OctetString
            invokespecial org.bouncycastle.asn1.cms.SignerIdentifier.<init>:(Lorg/bouncycastle/asn1/ASN1OctetString;)V
            areturn
         6: .line 59
      StackMap locals:
      StackMap stack:
            aload 0 /* o */
            instanceof org.bouncycastle.asn1.DERObject
            ifeq 8
         7: .line 61
            new org.bouncycastle.asn1.cms.SignerIdentifier
            dup
            aload 0 /* o */
            checkcast org.bouncycastle.asn1.DERObject
            invokespecial org.bouncycastle.asn1.cms.SignerIdentifier.<init>:(Lorg/bouncycastle/asn1/DERObject;)V
            areturn
         8: .line 64
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
         9: .line 65
            new java.lang.StringBuilder
            dup
            ldc "Illegal object in SignerIdentifier: "
            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;
        10: .line 64
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // java.lang.Object o
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0   11     0     o  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      o     

  public boolean isTagged();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
         0: .line 70
            aload 0 /* this */
            getfield org.bouncycastle.asn1.cms.SignerIdentifier.id:Lorg/bouncycastle/asn1/DEREncodable;
            instanceof org.bouncycastle.asn1.ASN1TaggedObject
            ireturn
        end local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/cms/SignerIdentifier;

  public org.bouncycastle.asn1.DEREncodable getId();
    descriptor: ()Lorg/bouncycastle/asn1/DEREncodable;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
         0: .line 75
            aload 0 /* this */
            getfield org.bouncycastle.asn1.cms.SignerIdentifier.id:Lorg/bouncycastle/asn1/DEREncodable;
            instanceof org.bouncycastle.asn1.ASN1TaggedObject
            ifeq 2
         1: .line 77
            aload 0 /* this */
            getfield org.bouncycastle.asn1.cms.SignerIdentifier.id:Lorg/bouncycastle/asn1/DEREncodable;
            checkcast org.bouncycastle.asn1.ASN1TaggedObject
            iconst_0
            invokestatic org.bouncycastle.asn1.ASN1OctetString.getInstance:(Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/ASN1OctetString;
            areturn
         2: .line 80
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield org.bouncycastle.asn1.cms.SignerIdentifier.id:Lorg/bouncycastle/asn1/DEREncodable;
            areturn
        end local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/bouncycastle/asn1/cms/SignerIdentifier;

  public org.bouncycastle.asn1.DERObject toASN1Object();
    descriptor: ()Lorg/bouncycastle/asn1/DERObject;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
         0: .line 96
            aload 0 /* this */
            getfield org.bouncycastle.asn1.cms.SignerIdentifier.id:Lorg/bouncycastle/asn1/DEREncodable;
            invokeinterface org.bouncycastle.asn1.DEREncodable.getDERObject:()Lorg/bouncycastle/asn1/DERObject;
            areturn
        end local 0 // org.bouncycastle.asn1.cms.SignerIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/cms/SignerIdentifier;
}
SourceFile: "SignerIdentifier.java"