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.KeyAgreeRecipientIdentifier 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.KeyAgreeRecipientIdentifier
  super_class: org.bouncycastle.asn1.ASN1Encodable
{
  private org.bouncycastle.asn1.cms.IssuerAndSerialNumber issuerSerial;
    descriptor: Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;
    flags: (0x0002) ACC_PRIVATE

  private org.bouncycastle.asn1.cms.RecipientKeyIdentifier rKeyID;
    descriptor: Lorg/bouncycastle/asn1/cms/RecipientKeyIdentifier;
    flags: (0x0002) ACC_PRIVATE

  public static org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier getInstance(org.bouncycastle.asn1.ASN1TaggedObject, boolean);
    descriptor: (Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier;
    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 30
            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.cms.KeyAgreeRecipientIdentifier.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier;
            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 static org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier getInstance(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Lorg/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // java.lang.Object obj
         0: .line 42
            aload 0 /* obj */
            ifnull 1
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier
            ifeq 2
         1: .line 44
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier
            areturn
         2: .line 47
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.ASN1Sequence
            ifeq 4
         3: .line 49
            new org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier
            dup
            aload 0 /* obj */
            invokestatic org.bouncycastle.asn1.cms.IssuerAndSerialNumber.getInstance:(Ljava/lang/Object;)Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;
            invokespecial org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier.<init>:(Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;)V
            areturn
         4: .line 52
      StackMap locals:
      StackMap stack:
            aload 0 /* obj */
            instanceof org.bouncycastle.asn1.ASN1TaggedObject
            ifeq 8
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.ASN1TaggedObject
            invokevirtual org.bouncycastle.asn1.ASN1TaggedObject.getTagNo:()I
            ifne 8
         5: .line 54
            new org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier
            dup
         6: .line 55
            aload 0 /* obj */
            checkcast org.bouncycastle.asn1.ASN1TaggedObject
            iconst_0
         7: .line 54
            invokestatic org.bouncycastle.asn1.cms.RecipientKeyIdentifier.getInstance:(Lorg/bouncycastle/asn1/ASN1TaggedObject;Z)Lorg/bouncycastle/asn1/cms/RecipientKeyIdentifier;
            invokespecial org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier.<init>:(Lorg/bouncycastle/asn1/cms/RecipientKeyIdentifier;)V
            areturn
         8: .line 58
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Invalid KeyAgreeRecipientIdentifier: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* obj */
            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 obj
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    9     0   obj  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      obj   

  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.KeyAgreeRecipientIdentifier this
        start local 1 // org.bouncycastle.asn1.cms.IssuerAndSerialNumber issuerSerial
         0: .line 61
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 64
            aload 0 /* this */
            aload 1 /* issuerSerial */
            putfield org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier.issuerSerial:Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;
         2: .line 65
            aload 0 /* this */
            aconst_null
            putfield org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier.rKeyID:Lorg/bouncycastle/asn1/cms/RecipientKeyIdentifier;
         3: .line 66
            return
        end local 1 // org.bouncycastle.asn1.cms.IssuerAndSerialNumber issuerSerial
        end local 0 // org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    4     0          this  Lorg/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier;
            0    4     1  issuerSerial  Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;
    MethodParameters:
              Name  Flags
      issuerSerial  

  public void <init>(org.bouncycastle.asn1.cms.RecipientKeyIdentifier);
    descriptor: (Lorg/bouncycastle/asn1/cms/RecipientKeyIdentifier;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier this
        start local 1 // org.bouncycastle.asn1.cms.RecipientKeyIdentifier rKeyID
         0: .line 68
            aload 0 /* this */
            invokespecial org.bouncycastle.asn1.ASN1Encodable.<init>:()V
         1: .line 71
            aload 0 /* this */
            aconst_null
            putfield org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier.issuerSerial:Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;
         2: .line 72
            aload 0 /* this */
            aload 1 /* rKeyID */
            putfield org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier.rKeyID:Lorg/bouncycastle/asn1/cms/RecipientKeyIdentifier;
         3: .line 73
            return
        end local 1 // org.bouncycastle.asn1.cms.RecipientKeyIdentifier rKeyID
        end local 0 // org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lorg/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier;
            0    4     1  rKeyID  Lorg/bouncycastle/asn1/cms/RecipientKeyIdentifier;
    MethodParameters:
        Name  Flags
      rKeyID  

  public org.bouncycastle.asn1.cms.IssuerAndSerialNumber getIssuerAndSerialNumber();
    descriptor: ()Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier this
         0: .line 77
            aload 0 /* this */
            getfield org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier.issuerSerial:Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;
            areturn
        end local 0 // org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier;

  public org.bouncycastle.asn1.cms.RecipientKeyIdentifier getRKeyID();
    descriptor: ()Lorg/bouncycastle/asn1/cms/RecipientKeyIdentifier;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier this
         0: .line 82
            aload 0 /* this */
            getfield org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier.rKeyID:Lorg/bouncycastle/asn1/cms/RecipientKeyIdentifier;
            areturn
        end local 0 // org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier;

  public org.bouncycastle.asn1.DERObject toASN1Object();
    descriptor: ()Lorg/bouncycastle/asn1/DERObject;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier this
         0: .line 96
            aload 0 /* this */
            getfield org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier.issuerSerial:Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;
            ifnull 2
         1: .line 98
            aload 0 /* this */
            getfield org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier.issuerSerial:Lorg/bouncycastle/asn1/cms/IssuerAndSerialNumber;
            invokevirtual org.bouncycastle.asn1.cms.IssuerAndSerialNumber.toASN1Object:()Lorg/bouncycastle/asn1/DERObject;
            areturn
         2: .line 101
      StackMap locals:
      StackMap stack:
            new org.bouncycastle.asn1.DERTaggedObject
            dup
            iconst_0
            iconst_0
            aload 0 /* this */
            getfield org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier.rKeyID:Lorg/bouncycastle/asn1/cms/RecipientKeyIdentifier;
            invokespecial org.bouncycastle.asn1.DERTaggedObject.<init>:(ZILorg/bouncycastle/asn1/DEREncodable;)V
            areturn
        end local 0 // org.bouncycastle.asn1.cms.KeyAgreeRecipientIdentifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/bouncycastle/asn1/cms/KeyAgreeRecipientIdentifier;
}
SourceFile: "KeyAgreeRecipientIdentifier.java"