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 abstract class org.bouncycastle.cms.bc.BcKeyTransRecipient implements org.bouncycastle.cms.KeyTransRecipient
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: org.bouncycastle.cms.bc.BcKeyTransRecipient
  super_class: java.lang.Object
{
  private org.bouncycastle.crypto.params.AsymmetricKeyParameter recipientKey;
    descriptor: Lorg/bouncycastle/crypto/params/AsymmetricKeyParameter;
    flags: (0x0002) ACC_PRIVATE

  public void <init>(org.bouncycastle.crypto.params.AsymmetricKeyParameter);
    descriptor: (Lorg/bouncycastle/crypto/params/AsymmetricKeyParameter;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.bouncycastle.cms.bc.BcKeyTransRecipient this
        start local 1 // org.bouncycastle.crypto.params.AsymmetricKeyParameter recipientKey
         0: .line 17
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 19
            aload 0 /* this */
            aload 1 /* recipientKey */
            putfield org.bouncycastle.cms.bc.BcKeyTransRecipient.recipientKey:Lorg/bouncycastle/crypto/params/AsymmetricKeyParameter;
         2: .line 20
            return
        end local 1 // org.bouncycastle.crypto.params.AsymmetricKeyParameter recipientKey
        end local 0 // org.bouncycastle.cms.bc.BcKeyTransRecipient this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    3     0          this  Lorg/bouncycastle/cms/bc/BcKeyTransRecipient;
            0    3     1  recipientKey  Lorg/bouncycastle/crypto/params/AsymmetricKeyParameter;
    MethodParameters:
              Name  Flags
      recipientKey  

  protected org.bouncycastle.crypto.CipherParameters extractSecretKey(org.bouncycastle.asn1.x509.AlgorithmIdentifier, org.bouncycastle.asn1.x509.AlgorithmIdentifier, byte[]);
    descriptor: (Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;[B)Lorg/bouncycastle/crypto/CipherParameters;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=5, locals=6, args_size=4
        start local 0 // org.bouncycastle.cms.bc.BcKeyTransRecipient this
        start local 1 // org.bouncycastle.asn1.x509.AlgorithmIdentifier keyEncryptionAlgorithm
        start local 2 // org.bouncycastle.asn1.x509.AlgorithmIdentifier encryptedKeyAlgorithm
        start local 3 // byte[] encryptedEncryptionKey
         0: .line 25
            new org.bouncycastle.operator.bc.BcRSAAsymmetricKeyUnwrapper
            dup
            aload 1 /* keyEncryptionAlgorithm */
            aload 0 /* this */
            getfield org.bouncycastle.cms.bc.BcKeyTransRecipient.recipientKey:Lorg/bouncycastle/crypto/params/AsymmetricKeyParameter;
            invokespecial org.bouncycastle.operator.bc.BcRSAAsymmetricKeyUnwrapper.<init>:(Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;Lorg/bouncycastle/crypto/params/AsymmetricKeyParameter;)V
            astore 4 /* unwrapper */
        start local 4 // org.bouncycastle.operator.AsymmetricKeyUnwrapper unwrapper
         1: .line 29
            aload 4 /* unwrapper */
            aload 2 /* encryptedKeyAlgorithm */
            aload 3 /* encryptedEncryptionKey */
            invokevirtual org.bouncycastle.operator.AsymmetricKeyUnwrapper.generateUnwrappedKey:(Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;[B)Lorg/bouncycastle/operator/GenericKey;
            invokestatic org.bouncycastle.cms.bc.CMSUtils.getBcKey:(Lorg/bouncycastle/operator/GenericKey;)Lorg/bouncycastle/crypto/CipherParameters;
         2: areturn
         3: .line 31
      StackMap locals: org.bouncycastle.cms.bc.BcKeyTransRecipient org.bouncycastle.asn1.x509.AlgorithmIdentifier org.bouncycastle.asn1.x509.AlgorithmIdentifier byte[] org.bouncycastle.operator.AsymmetricKeyUnwrapper
      StackMap stack: org.bouncycastle.operator.OperatorException
            astore 5 /* e */
        start local 5 // org.bouncycastle.operator.OperatorException e
         4: .line 33
            new org.bouncycastle.cms.CMSException
            dup
            new java.lang.StringBuilder
            dup
            ldc "exception unwrapping key: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 5 /* e */
            invokevirtual org.bouncycastle.operator.OperatorException.getMessage:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            aload 5 /* e */
            invokespecial org.bouncycastle.cms.CMSException.<init>:(Ljava/lang/String;Ljava/lang/Exception;)V
            athrow
        end local 5 // org.bouncycastle.operator.OperatorException e
        end local 4 // org.bouncycastle.operator.AsymmetricKeyUnwrapper unwrapper
        end local 3 // byte[] encryptedEncryptionKey
        end local 2 // org.bouncycastle.asn1.x509.AlgorithmIdentifier encryptedKeyAlgorithm
        end local 1 // org.bouncycastle.asn1.x509.AlgorithmIdentifier keyEncryptionAlgorithm
        end local 0 // org.bouncycastle.cms.bc.BcKeyTransRecipient this
      LocalVariableTable:
        Start  End  Slot                    Name  Signature
            0    5     0                    this  Lorg/bouncycastle/cms/bc/BcKeyTransRecipient;
            0    5     1  keyEncryptionAlgorithm  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            0    5     2   encryptedKeyAlgorithm  Lorg/bouncycastle/asn1/x509/AlgorithmIdentifier;
            0    5     3  encryptedEncryptionKey  [B
            1    5     4               unwrapper  Lorg/bouncycastle/operator/AsymmetricKeyUnwrapper;
            4    5     5                       e  Lorg/bouncycastle/operator/OperatorException;
      Exception table:
        from    to  target  type
           1     2       3  Class org.bouncycastle.operator.OperatorException
    Exceptions:
      throws org.bouncycastle.cms.CMSException
    MethodParameters:
                        Name  Flags
      keyEncryptionAlgorithm  
      encryptedKeyAlgorithm   
      encryptedEncryptionKey  
}
SourceFile: "BcKeyTransRecipient.java"