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.JceKeyAgreeRecipient$1 implements org.bouncycastle.cms.jcajce.KeyMaterialGenerator
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.bouncycastle.cms.jcajce.JceKeyAgreeRecipient$1
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.bouncycastle.cms.jcajce.JceKeyAgreeRecipient$1 this
         0: .line 280
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.bouncycastle.cms.jcajce.JceKeyAgreeRecipient$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/bouncycastle/cms/jcajce/JceKeyAgreeRecipient$1;

  public byte[] generateKDFMaterial(org.bouncycastle.asn1.x509.AlgorithmIdentifier, int, byte[]);
    descriptor: (Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;I[B)[B
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=6, args_size=4
        start local 0 // org.bouncycastle.cms.jcajce.JceKeyAgreeRecipient$1 this
        start local 1 // org.bouncycastle.asn1.x509.AlgorithmIdentifier keyAlgorithm
        start local 2 // int keySize
        start local 3 // byte[] userKeyMaterialParameters
         0: .line 287
            new org.bouncycastle.asn1.cms.ecc.ECCCMSSharedInfo
            dup
            new org.bouncycastle.asn1.x509.AlgorithmIdentifier
            dup
            aload 1 /* keyAlgorithm */
            invokevirtual org.bouncycastle.asn1.x509.AlgorithmIdentifier.getAlgorithm:()Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;
            getstatic org.bouncycastle.asn1.DERNull.INSTANCE:Lorg/bouncycastle/asn1/DERNull;
            invokespecial org.bouncycastle.asn1.x509.AlgorithmIdentifier.<init>:(Lorg/bouncycastle/asn1/ASN1ObjectIdentifier;Lorg/bouncycastle/asn1/ASN1Encodable;)V
            aload 3 /* userKeyMaterialParameters */
            iload 2 /* keySize */
            invokestatic org.bouncycastle.util.Pack.intToBigEndian:(I)[B
            invokespecial org.bouncycastle.asn1.cms.ecc.ECCCMSSharedInfo.<init>:(Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;[B[B)V
            astore 4 /* eccInfo */
        start local 4 // org.bouncycastle.asn1.cms.ecc.ECCCMSSharedInfo eccInfo
         1: .line 291
            aload 4 /* eccInfo */
            ldc "DER"
            invokevirtual org.bouncycastle.asn1.cms.ecc.ECCCMSSharedInfo.getEncoded:(Ljava/lang/String;)[B
         2: areturn
         3: .line 293
      StackMap locals: org.bouncycastle.cms.jcajce.JceKeyAgreeRecipient$1 org.bouncycastle.asn1.x509.AlgorithmIdentifier int byte[] org.bouncycastle.asn1.cms.ecc.ECCCMSSharedInfo
      StackMap stack: java.io.IOException
            astore 5 /* e */
        start local 5 // java.io.IOException e
         4: .line 295
            new java.lang.IllegalStateException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Unable to create KDF material: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 5 /* e */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
        end local 5 // java.io.IOException e
        end local 4 // org.bouncycastle.asn1.cms.ecc.ECCCMSSharedInfo eccInfo
        end local 3 // byte[] userKeyMaterialParameters
        end local 2 // int keySize
        end local 1 // org.bouncycastle.asn1.x509.AlgorithmIdentifier keyAlgorithm
        end local 0 // org.bouncycastle.cms.jcajce.JceKeyAgreeRecipient$1 this
      LocalVariableTable:
        Start  End  Slot                       Name  Signature
            0    5     0                       this  Lorg/bouncycastle/cms/jcajce/JceKeyAgreeRecipient$1;
            0    5     1               keyAlgorithm  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            0    5     2                    keySize  I
            0    5     3  userKeyMaterialParameters  [B
            1    5     4                    eccInfo  Lorg/bouncycastle/asn1/cms/ecc/ECCCMSSharedInfo;
            4    5     5                          e  Ljava/io/IOException;
      Exception table:
        from    to  target  type
           1     2       3  Class java.io.IOException
    MethodParameters:
                           Name  Flags
      keyAlgorithm               
      keySize                    
      userKeyMaterialParameters  
}
SourceFile: "JceKeyAgreeRecipient.java"
EnclosingMethod: org.bouncycastle.cms.jcajce.JceKeyAgreeRecipient
NestHost: org.bouncycastle.cms.jcajce.JceKeyAgreeRecipient
InnerClasses:
  org.bouncycastle.cms.jcajce.JceKeyAgreeRecipient$1