public class EncryptedPrivateKeyInfo
extends Object 

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

Since:

1.4

See Also:

PKCS8EncodedKeySpec

• Constructor Summary

  Constructors

  Constructor and Description
  EncryptedPrivateKeyInfo (AlgorithmParameters algParams, byte[] encryptedData) Constructs an EncryptedPrivateKeyInfo from the encryption algorithm parameters and the encrypted data.
  EncryptedPrivateKeyInfo (byte[] encoded) Constructs (i.e., parses) an EncryptedPrivateKeyInfo from its ASN.1 encoding.
  EncryptedPrivateKeyInfo (String algName, byte[] encryptedData) Constructs an EncryptedPrivateKeyInfo from the encryption algorithm name and the encrypted data.

• Method Summary

  Methods

  Modifier and Type	Method and Description
  String	getAlgName () Returns the encryption algorithm.
  AlgorithmParameters	getAlgParameters () Returns the algorithm parameters used by the encryption algorithm.
  byte[]	getEncoded () Returns the ASN.1 encoding of this object.
  byte[]	getEncryptedData () Returns the encrypted data.
  PKCS8EncodedKeySpec	getKeySpec (Cipher cipher) Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.
  PKCS8EncodedKeySpec	getKeySpec (Key decryptKey) Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.
  PKCS8EncodedKeySpec	getKeySpec (Key decryptKey, Provider provider) Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.
  PKCS8EncodedKeySpec	getKeySpec (Key decryptKey, String providerName) 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 IOException 

    Constructs (i.e., parses) an EncryptedPrivateKeyInfo from its ASN.1 encoding.

    Parameters:

    encoded - the ASN.1 encoding of this object. The contents of the array are copied to protect against subsequent modification.

    Throws:

    NullPointerException - if the encoded is null.

    IOException - if error occurs when parsing the ASN.1 encoding.

  • EncryptedPrivateKeyInfo

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

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

    Note: This constructor will use null as the value of the algorithm parameters. If the encryption algorithm has parameters whose value is not null, a different constructor, e.g. EncryptedPrivateKeyInfo(AlgorithmParameters, byte[]), should be used.

    Parameters:

    algName - encryption algorithm name. See Appendix A in the Java Cryptography Architecture Reference Guide for information about standard Cipher algorithm names.

    encryptedData - encrypted data. The contents of encrypedData are copied to protect against subsequent modification when constructing this object.

    Throws:

    NullPointerException - if algName or encryptedData is null.

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

    NoSuchAlgorithmException - if the specified algName is not supported.

  • EncryptedPrivateKeyInfo

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

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

    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. The contents of encrypedData are copied to protect against subsequent modification when constructing this object.

    Throws:

    NullPointerException - if algParams or encryptedData is null.

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

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

• Method Detail

  • getAlgName

    public String getAlgName()

    Returns the encryption algorithm.

    Note: Standard name is returned instead of the specified one in the constructor when such mapping is available. See Appendix A in the Java Cryptography Architecture Reference Guide for information about standard Cipher algorithm names.

    Returns:

    the encryption algorithm name.

  • getAlgParameters

    public AlgorithmParameters getAlgParameters()

    Returns the algorithm parameters used by the encryption algorithm.

    Returns:

    the algorithm parameters.

  • getEncryptedData

    public byte[] getEncryptedData()

    Returns the encrypted data.

    Returns:

    the encrypted data. Returns a new array each time this method is called.

  • getKeySpec

    public PKCS8EncodedKeySpec getKeySpec(Cipher cipher)
     throws InvalidKeySpecException 

    Extract the enclosed PKCS8EncodedKeySpec object from the encrypted data and return it.
    Note: In order to successfully retrieve the enclosed PKCS8EncodedKeySpec object, cipher needs to be initialized to either Cipher.DECRYPT_MODE or Cipher.UNWRAP_MODE, with the same key and parameters used for generating the encrypted data.

    Parameters:

    cipher - the initialized cipher object which will be used for decrypting the encrypted data.

    Returns:

    the PKCS8EncodedKeySpec object.

    Throws:

    NullPointerException - if cipher is null.

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

  • getKeySpec

    public PKCS8EncodedKeySpec getKeySpec(Key decryptKey)
     throws NoSuchAlgorithmException,
     InvalidKeyException 

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

    Parameters:

    decryptKey - key used for decrypting the encrypted data.

    Returns:

    the PKCS8EncodedKeySpec object.

    Throws:

    NullPointerException - if decryptKey is null.

    NoSuchAlgorithmException - if cannot find appropriate cipher to decrypt the encrypted data.

    InvalidKeyException - if decryptKey cannot be used to decrypt the encrypted data or the decryption result is not a valid PKCS8KeySpec.

    Since:

    1.5

  • getKeySpec

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

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

    Parameters:

    decryptKey - key used for decrypting the encrypted data.

    providerName - the name of provider whose Cipher implementation will be used.

    Returns:

    the PKCS8EncodedKeySpec object.

    Throws:

    NullPointerException - if decryptKey or providerName is null.

    NoSuchProviderException - if no provider providerName is registered.

    NoSuchAlgorithmException - if cannot find appropriate cipher to decrypt the encrypted data.

    InvalidKeyException - if decryptKey cannot be used to decrypt the encrypted data or the decryption result is not a valid PKCS8KeySpec.

    Since:

    1.5

  • getKeySpec

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

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

    Parameters:

    decryptKey - key used for decrypting the encrypted data.

    provider - the name of provider whose Cipher implementation will be used.

    Returns:

    the PKCS8EncodedKeySpec object.

    Throws:

    NullPointerException - if decryptKey or provider is null.

    NoSuchAlgorithmException - if cannot find appropriate cipher to decrypt the encrypted data in provider.

    InvalidKeyException - if decryptKey cannot be used to decrypt the encrypted data or the decryption result is not a valid PKCS8KeySpec.

    Since:

    1.5

  • getEncoded

    public byte[] getEncoded()
     throws IOException 

    Returns the ASN.1 encoding of this object.

    Returns:

    the ASN.1 encoding. Returns a new array each time this method is called.

    Throws:

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