javax.crypto
Class EncryptedPrivateKeyInfo

java.lang.Object
  |
  +--javax.crypto.EncryptedPrivateKeyInfo

public class EncryptedPrivateKeyInfo

extends java.lang.Object

This class implements the EncryptedPrivateKeyInfo type as defined in PKCS #8.

Its ASN.1 definition is as follows:

 EncryptedPrivateKeyInfo ::=  SEQUENCE {
     encryptionAlgorithm   AlgorithmIdentifier,
     encryptedData   OCTET STRING }
 
 AlgorithmIdentifier  ::=  SEQUENCE  {
     algorithm              OBJECT IDENTIFIER,
     parameters             ANY DEFINED BY algorithm OPTIONAL  }
 

Constructor Summary

EncryptedPrivateKeyInfo(java.security.AlgorithmParameters algParams, byte[] encryptedData)
Constructs an EncryptedPrivateKeyInfo from the encryption algorithm parameters and the encrypted data.

EncryptedPrivateKeyInfo(byte[] encoded)

EncryptedPrivateKeyInfo(java.lang.String algName, byte[] encryptedData)

Method Summary

java.lang.String	getAlgName() Returns the encryption algorithm.
java.security.AlgorithmParameters	getAlgParameters() Returns the algorithm parameters used by the encryption algorithm.
byte[]	getEncoded() Returns the ASN.1 encoding of this object.
byte[]	getEncryptedData() Returns a copy of the encrypted data.
java.security.spec.PKCS8EncodedKeySpec	getKeySpec(Cipher c) Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

EncryptedPrivateKeyInfo

public EncryptedPrivateKeyInfo(byte[] encoded)
                        throws java.lang.NullPointerException,
                               java.io.IOException

EncryptedPrivateKeyInfo

public EncryptedPrivateKeyInfo(java.lang.String algName,
                               byte[] encryptedData)
                        throws java.lang.NullPointerException,
                               java.lang.IllegalArgumentException,
                               java.security.NoSuchAlgorithmException

EncryptedPrivateKeyInfo

public EncryptedPrivateKeyInfo(java.security.AlgorithmParameters algParams,
                               byte[] encryptedData)
                        throws java.lang.NullPointerException,
                               java.lang.IllegalArgumentException,
                               java.security.NoSuchAlgorithmException

Constructs an EncryptedPrivateKeyInfo from the encryption algorithm parameters and the encrypted data.

Note: the encrypedData is cloned when constructing this object.

Parameters:

algParams - the algorithm parameters for the encryption algorithm. algParams.getEncoded() should return the ASN.1 encoded bytes of the parameters field of the AlgorithmIdentifer component of the EncryptedPrivateKeyInfo type.

encryptedData - encrypted data.

Throws:

java.lang.NullPointerException - if algParams or encryptedData is null.

java.lang.IllegalArgumentException - if encryptedData is empty, i.e. 0-length.

java.security.NoSuchAlgorithmException - if the specified algName of the specified algParams parameter is not supported.

Method Detail

getAlgName

public java.lang.String getAlgName()

Returns the encryption algorithm.

getAlgParameters

public java.security.AlgorithmParameters getAlgParameters()

Returns the algorithm parameters used by the encryption algorithm.

getEncryptedData

public byte[] getEncryptedData()

Returns a copy of the encrypted data.

getKeySpec

public java.security.spec.PKCS8EncodedKeySpec getKeySpec(Cipher c)
                                                  throws java.security.spec.InvalidKeySpecException

Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.

Returns:

the PKCS8EncodedKeySpec object.

Throws:

java.security.spec.InvalidKeySpecException - if the given cipher is inappropriate for the encrypted data or the encrypted data is corrupted and cannot be decrypted.

getEncoded

public byte[] getEncoded()
                  throws java.io.IOException

Returns the ASN.1 encoding of this object.

Throws:

java.io.IOException - if error occurs when constructing its ASN.1 encoding.