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.cms.jcajce.JceKEKAuthenticatedRecipient$1 implements org.bouncycastle.operator.MacCalculator
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1
  super_class: java.lang.Object
{
  final org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient this$0;
    descriptor: Lorg/bouncycastle/cms/jcajce/JceKEKAuthenticatedRecipient;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private final org.bouncycastle.asn1.x509.AlgorithmIdentifier val$contentMacAlgorithm;
    descriptor: Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  private final java.security.Key val$secretKey;
    descriptor: Ljava/security/Key;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  private final javax.crypto.Mac val$dataMac;
    descriptor: Ljavax/crypto/Mac;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient, org.bouncycastle.asn1.x509.AlgorithmIdentifier, java.security.Key, javax.crypto.Mac);
    descriptor: (Lorg/bouncycastle/cms/jcajce/JceKEKAuthenticatedRecipient;Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Ljava/security/Key;Ljavax/crypto/Mac;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=5, args_size=5
        start local 0 // org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1 this
         0: .line 38
            aload 0 /* this */
            aload 1
            putfield org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1.this$0:Lorg/bouncycastle/cms/jcajce/JceKEKAuthenticatedRecipient;
            aload 0 /* this */
            aload 2
            putfield org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1.val$contentMacAlgorithm:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            aload 0 /* this */
            aload 3
            putfield org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1.val$secretKey:Ljava/security/Key;
            aload 0 /* this */
            aload 4
            putfield org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1.val$dataMac:Ljavax/crypto/Mac;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cms/jcajce/JceKEKAuthenticatedRecipient$1;
    MethodParameters:
                         Name  Flags
      this$0                   final
      val$contentMacAlgorithm  final
      val$secretKey            final
      val$dataMac              final

  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.cms.jcajce.JceKEKAuthenticatedRecipient$1 this
         0: .line 42
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1.val$contentMacAlgorithm:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            areturn
        end local 0 // org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cms/jcajce/JceKEKAuthenticatedRecipient$1;

  public org.bouncycastle.operator.GenericKey getKey();
    descriptor: ()Lorg/bouncycastle/operator/GenericKey;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1 this
         0: .line 47
            new org.bouncycastle.operator.jcajce.JceGenericKey
            dup
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1.val$contentMacAlgorithm:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1.val$secretKey:Ljava/security/Key;
            invokespecial org.bouncycastle.operator.jcajce.JceGenericKey.<init>:(Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Ljava/security/Key;)V
            areturn
        end local 0 // org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cms/jcajce/JceKEKAuthenticatedRecipient$1;

  public java.io.OutputStream getOutputStream();
    descriptor: ()Ljava/io/OutputStream;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1 this
         0: .line 52
            new org.bouncycastle.jcajce.io.MacOutputStream
            dup
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1.val$dataMac:Ljavax/crypto/Mac;
            invokespecial org.bouncycastle.jcajce.io.MacOutputStream.<init>:(Ljavax/crypto/Mac;)V
            areturn
        end local 0 // org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cms/jcajce/JceKEKAuthenticatedRecipient$1;

  public byte[] getMac();
    descriptor: ()[B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1 this
         0: .line 57
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1.val$dataMac:Ljavax/crypto/Mac;
            invokevirtual javax.crypto.Mac.doFinal:()[B
            areturn
        end local 0 // org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cms/jcajce/JceKEKAuthenticatedRecipient$1;
}
SourceFile: "JceKEKAuthenticatedRecipient.java"
EnclosingMethod: org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient.getRecipientOperator:(Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;[B)Lorg/bouncycastle/cms/RecipientOperator;
NestHost: org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient
InnerClasses:
  org.bouncycastle.cms.jcajce.JceKEKAuthenticatedRecipient$1