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. 
public class org.bouncycastle.operator.bc.BcAESSymmetricKeyWrapper extends org.bouncycastle.operator.bc.BcSymmetricKeyWrapper
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.bouncycastle.operator.bc.BcAESSymmetricKeyWrapper
  super_class: org.bouncycastle.operator.bc.BcSymmetricKeyWrapper
{
  public void <init>(org.bouncycastle.crypto.params.KeyParameter);
    descriptor: (Lorg/bouncycastle/crypto/params/KeyParameter;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.bouncycastle.operator.bc.BcAESSymmetricKeyWrapper this
        start local 1 // org.bouncycastle.crypto.params.KeyParameter wrappingKey
         0: .line 11
            aload 0 /* this */
            aload 1 /* wrappingKey */
            invokestatic org.bouncycastle.operator.bc.AESUtil.determineKeyEncAlg:(Lorg/bouncycastle/crypto/params/KeyParameter;)Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            new org.bouncycastle.crypto.engines.AESWrapEngine
            dup
            invokespecial org.bouncycastle.crypto.engines.AESWrapEngine.<init>:()V
            aload 1 /* wrappingKey */
            invokespecial org.bouncycastle.operator.bc.BcSymmetricKeyWrapper.<init>:(Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Lorg/bouncycastle/crypto/Wrapper;Lorg/bouncycastle/crypto/params/KeyParameter;)V
         1: .line 12
            return
        end local 1 // org.bouncycastle.crypto.params.KeyParameter wrappingKey
        end local 0 // org.bouncycastle.operator.bc.BcAESSymmetricKeyWrapper this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    2     0         this  Lorg/bouncycastle/operator/bc/BcAESSymmetricKeyWrapper;
            0    2     1  wrappingKey  Lorg/bouncycastle/crypto/params/KeyParameter;
    MethodParameters:
             Name  Flags
      wrappingKey  
}
SourceFile: "BcAESSymmetricKeyWrapper.java"