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.EnvelopedDataHelper$2 implements org.bouncycastle.cms.jcajce.EnvelopedDataHelper$JCECallback
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2
  super_class: java.lang.Object
{
  final org.bouncycastle.cms.jcajce.EnvelopedDataHelper this$0;
    descriptor: Lorg/bouncycastle/cms/jcajce/EnvelopedDataHelper;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

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

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

  void <init>(org.bouncycastle.cms.jcajce.EnvelopedDataHelper, org.bouncycastle.asn1.x509.AlgorithmIdentifier, java.security.Key);
    descriptor: (Lorg/bouncycastle/cms/jcajce/EnvelopedDataHelper;Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Ljava/security/Key;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2 this
         0: .line 409
            aload 0 /* this */
            aload 1
            putfield org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2.this$0:Lorg/bouncycastle/cms/jcajce/EnvelopedDataHelper;
            aload 0 /* this */
            aload 2
            putfield org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2.val$macAlgId:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            aload 0 /* this */
            aload 3
            putfield org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2.val$sKey:Ljava/security/Key;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cms/jcajce/EnvelopedDataHelper$2;
    MethodParameters:
              Name  Flags
      this$0        final
      val$macAlgId  final
      val$sKey      final

  public java.lang.Object doInJCE();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=1
        start local 0 // org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2 this
         0: .line 416
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2.this$0:Lorg/bouncycastle/cms/jcajce/EnvelopedDataHelper;
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2.val$macAlgId:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            invokevirtual org.bouncycastle.asn1.x509.AlgorithmIdentifier.getAlgorithm:()Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            invokevirtual org.bouncycastle.cms.jcajce.EnvelopedDataHelper.createMac:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;)Ljavax/crypto/Mac;
            astore 1 /* mac */
        start local 1 // javax.crypto.Mac mac
         1: .line 417
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2.val$macAlgId:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            invokevirtual org.bouncycastle.asn1.x509.AlgorithmIdentifier.getParameters:()Lorg/bouncycastle/asn1/ASN1Encodable;
            astore 2 /* sParams */
        start local 2 // org.bouncycastle.asn1.ASN1Encodable sParams
         2: .line 418
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2.val$macAlgId:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            invokevirtual org.bouncycastle.asn1.x509.AlgorithmIdentifier.getAlgorithm:()Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            invokevirtual org.bouncycastle.asn1.ASN1ObjectIdentifier.getId:()Ljava/lang/String;
            pop
         3: .line 420
            aload 2 /* sParams */
            ifnull 10
            aload 2 /* sParams */
            instanceof org.bouncycastle.asn1.ASN1Null
            ifne 10
         4: .line 424
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2.this$0:Lorg/bouncycastle/cms/jcajce/EnvelopedDataHelper;
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2.val$macAlgId:Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            invokevirtual org.bouncycastle.asn1.x509.AlgorithmIdentifier.getAlgorithm:()Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            invokevirtual org.bouncycastle.cms.jcajce.EnvelopedDataHelper.createAlgorithmParameters:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;)Ljava/security/AlgorithmParameters;
            astore 3 /* params */
        start local 3 // java.security.AlgorithmParameters params
         5: .line 426
            aload 3 /* params */
            aload 2 /* sParams */
            invokestatic org.bouncycastle.cms.jcajce.CMSUtils.loadParameters:(Ljava/security/AlgorithmParameters;Lorg/bouncycastle/asn1/ASN1Encodable;)V
         6: .line 428
            aload 1 /* mac */
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2.val$sKey:Ljava/security/Key;
            aload 3 /* params */
            ldc Ljava/security/spec/AlgorithmParameterSpec;
            invokevirtual java.security.AlgorithmParameters.getParameterSpec:(Ljava/lang/Class;)Ljava/security/spec/AlgorithmParameterSpec;
            invokevirtual javax.crypto.Mac.init:(Ljava/security/Key;Ljava/security/spec/AlgorithmParameterSpec;)V
        end local 3 // java.security.AlgorithmParameters params
         7: .line 429
            goto 11
         8: .line 430
      StackMap locals: org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2 javax.crypto.Mac org.bouncycastle.asn1.ASN1Encodable
      StackMap stack: java.security.NoSuchAlgorithmException
            astore 3 /* e */
        start local 3 // java.security.NoSuchAlgorithmException e
         9: .line 432
            aload 3 /* e */
            athrow
        end local 3 // java.security.NoSuchAlgorithmException e
        10: .line 437
      StackMap locals:
      StackMap stack:
            aload 1 /* mac */
            aload 0 /* this */
            getfield org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2.val$sKey:Ljava/security/Key;
            invokevirtual javax.crypto.Mac.init:(Ljava/security/Key;)V
        11: .line 440
      StackMap locals:
      StackMap stack:
            aload 1 /* mac */
            areturn
        end local 2 // org.bouncycastle.asn1.ASN1Encodable sParams
        end local 1 // javax.crypto.Mac mac
        end local 0 // org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2 this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0   12     0     this  Lorg/bouncycastle/cms/jcajce/EnvelopedDataHelper$2;
            1   12     1      mac  Ljavax/crypto/Mac;
            2   12     2  sParams  Lorg/bouncycastle/asn1/ASN1Encodable;
            5    7     3   params  Ljava/security/AlgorithmParameters;
            9   10     3        e  Ljava/security/NoSuchAlgorithmException;
      Exception table:
        from    to  target  type
           4     7       8  Class java.security.NoSuchAlgorithmException
    Exceptions:
      throws org.bouncycastle.cms.CMSException, java.security.InvalidAlgorithmParameterException, java.security.InvalidKeyException, java.security.spec.InvalidParameterSpecException, java.security.NoSuchAlgorithmException, javax.crypto.NoSuchPaddingException, java.security.NoSuchProviderException
}
SourceFile: "EnvelopedDataHelper.java"
EnclosingMethod: org.bouncycastle.cms.jcajce.EnvelopedDataHelper.createContentMac:(Ljava/security/Key;Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;)Ljavax/crypto/Mac;
NestHost: org.bouncycastle.cms.jcajce.EnvelopedDataHelper
InnerClasses:
  org.bouncycastle.cms.jcajce.EnvelopedDataHelper$2
  abstract JCECallback = org.bouncycastle.cms.jcajce.EnvelopedDataHelper$JCECallback of org.bouncycastle.cms.jcajce.EnvelopedDataHelper