IT. Expert System.

public class EncryptedPrivateKeyInfo
extends Object

• Constructor Summary

  Constructors

  Constructor and Description
  EncryptedPrivateKeyInfo(AlgorithmParameters algParams, byte[] encryptedData) Creates an EncryptedPrivateKeyInfo instance from the encryption algorithm parameters an its encrypted data.
  EncryptedPrivateKeyInfo(byte[] encoded) Creates an EncryptedPrivateKeyInfo instance from its encoded representation by parsing it.
  EncryptedPrivateKeyInfo(String encryptionAlgorithmName, byte[] encryptedData) Creates an EncryptedPrivateKeyInfo instance from an algorithm name and its encrypted data.

• Method Summary

  Methods

  Modifier and Type	Method and Description
  String	getAlgName() Returns the name of the encryption algorithm.
  AlgorithmParameters	getAlgParameters() Returns the parameters used by the encryption algorithm.
  byte[]	getEncoded() Returns the ASN.1 encoded representation of this object.
  byte[]	getEncryptedData() Returns the encrypted data of this key.
  PKCS8EncodedKeySpec	getKeySpec(Cipher cipher) Returns the PKCS8EncodedKeySpec object extracted from the encrypted data.
  PKCS8EncodedKeySpec	getKeySpec(Key decryptKey) Returns the PKCS8EncodedKeySpec object extracted from the encrypted data.
  PKCS8EncodedKeySpec	getKeySpec(Key decryptKey, Provider provider) Returns the PKCS8EncodedKeySpec object extracted from the encrypted data.
  PKCS8EncodedKeySpec	getKeySpec(Key decryptKey, String providerName) Returns the PKCS8EncodedKeySpec object extracted from the encrypted data.

  • 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 IOException

    Creates an EncryptedPrivateKeyInfo instance from its encoded representation by parsing it.

    Parameters:

    encoded - the encoded representation of this object

    Throws:

    IOException - if parsing the encoded representation fails.

    NullPointerException - if encoded is null.

  • EncryptedPrivateKeyInfo

    public EncryptedPrivateKeyInfo(String encryptionAlgorithmName,
                           byte[] encryptedData)
                            throws NoSuchAlgorithmException

    Creates an EncryptedPrivateKeyInfo instance from an algorithm name and its encrypted data.

    Parameters:

    encryptionAlgorithmName - the name of an algorithm.

    encryptedData - the encrypted data.

    Throws:

    NoSuchAlgorithmException - if the encrAlgName is not a supported algorithm.

    NullPointerException - if encrAlgName or encryptedData is null.

    IllegalArgumentException - if encryptedData is empty.

  • EncryptedPrivateKeyInfo

    public EncryptedPrivateKeyInfo(AlgorithmParameters algParams,
                           byte[] encryptedData)
                            throws NoSuchAlgorithmException

    Creates an EncryptedPrivateKeyInfo instance from the encryption algorithm parameters an its encrypted data.

    Parameters:

    algParams - the encryption algorithm parameters.

    encryptedData - the encrypted data.

    Throws:

    NoSuchAlgorithmException - if the algorithm name of the specified algParams parameter is not supported.

    NullPointerException - if algParams or encryptedData is null.

• Method Detail

  • getAlgName

    public String getAlgName()

    Returns the name of the encryption algorithm.

    Returns:

    the name of the encryption algorithm.

  • getAlgParameters

    public AlgorithmParameters getAlgParameters()

    Returns the parameters used by the encryption algorithm.

    Returns:

    the parameters used by the encryption algorithm.

  • getEncryptedData

    public byte[] getEncryptedData()

    Returns the encrypted data of this key.

    Returns:

    the encrypted data of this key, each time this method is called a new array is returned.

  • getKeySpec

    public PKCS8EncodedKeySpec getKeySpec(Cipher cipher)
                                   throws InvalidKeySpecException

    Returns the PKCS8EncodedKeySpec object extracted from the encrypted data.

    The cipher must be initialize in either Cipher.DECRYPT_MODE or Cipher.UNWRAP_MODE with the same parameters and key used for encrypting this.

    Parameters:

    cipher - the cipher initialized for decrypting the encrypted data.

    Returns:

    the extracted PKCS8EncodedKeySpec.

    Throws:

    InvalidKeySpecException - if the specified cipher is not suited to decrypt the encrypted data.

    NullPointerException - if cipher is null.

  • getKeySpec

    public PKCS8EncodedKeySpec getKeySpec(Key decryptKey)
                                   throws NoSuchAlgorithmException,
                                          InvalidKeyException

    Returns the PKCS8EncodedKeySpec object extracted from the encrypted data.

    Parameters:

    decryptKey - the key to decrypt the encrypted data with.

    Returns:

    the extracted PKCS8EncodedKeySpec.

    Throws:

    NoSuchAlgorithmException - if no usable cipher can be found to decrypt the encrypted data.

    InvalidKeyException - if decryptKey is not usable to decrypt the encrypted data.

    NullPointerException - if decryptKey is null.

  • getKeySpec

    public PKCS8EncodedKeySpec getKeySpec(Key decryptKey,
                                 String providerName)
                                   throws NoSuchProviderException,
                                          NoSuchAlgorithmException,
                                          InvalidKeyException

    Returns the PKCS8EncodedKeySpec object extracted from the encrypted data.

    Parameters:

    decryptKey - the key to decrypt the encrypted data with.

    providerName - the name of a provider whose cipher implementation should be used.

    Returns:

    the extracted PKCS8EncodedKeySpec.

    Throws:

    NoSuchProviderException - if no provider with providerName can be found.

    NoSuchAlgorithmException - if no usable cipher can be found to decrypt the encrypted data.

    InvalidKeyException - if decryptKey is not usable to decrypt the encrypted data.

    NullPointerException - if decryptKey or providerName is null .

  • getKeySpec

    public PKCS8EncodedKeySpec getKeySpec(Key decryptKey,
                                 Provider provider)
                                   throws NoSuchAlgorithmException,
                                          InvalidKeyException

    Returns the PKCS8EncodedKeySpec object extracted from the encrypted data.

    Parameters:

    decryptKey - the key to decrypt the encrypted data with.

    provider - the provider whose cipher implementation should be used.

    Returns:

    the extracted PKCS8EncodedKeySpec.

    Throws:

    NoSuchAlgorithmException - if no usable cipher can be found to decrypt the encrypted data.

    InvalidKeyException - if decryptKey is not usable to decrypt the encrypted data.

    NullPointerException - if decryptKey or provider is null.

  • getEncoded

    public byte[] getEncoded()
                      throws IOException

    Returns the ASN.1 encoded representation of this object.

    Returns:

    the ASN.1 encoded representation of this object.

    Throws:

    IOException - if encoding this object fails.