javax.crypto

Class EncryptedPrivateKeyInfo

java.lang.Object

javax.crypto.EncryptedPrivateKeyInfo

public class EncryptedPrivateKeyInfo
extends Object

An implementation of the EncryptedPrivateKeyInfo ASN.1 type as specified in PKCS #8 - Private-Key Information Syntax Standard.

The ASN.1 type EncryptedPrivateKeyInfo is:

EncryptedPrivateKeyInfo ::= SEQUENCE {
   encryptionAlgorithm EncryptionAlgorithmIdentifier,
   encryptedData EncryptedData }

 EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier

 EncrytpedData ::= 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 params, byte[] encryptedData) Create a new EncryptedPrivateKeyInfo object from raw encrypted data and the parameters used for encryption.
EncryptedPrivateKeyInfo(byte[] encoded) Create a new EncryptedPrivateKeyInfo from an encoded representation, parsing the ASN.1 sequence.
EncryptedPrivateKeyInfo(String algName, byte[] encryptedData) Create a new EncryptedPrivateKeyInfo from the cipher name and the encrytpedData.

Method Summary

Methods

Modifier and Type	Method and Description
String	getAlgName() Return the name of the cipher used to encrypt this key.
AlgorithmParameters	getAlgParameters()
byte[]	getEncoded()
byte[]	getEncryptedData()
PKCS8EncodedKeySpec	getKeySpec(Cipher cipher)

Methods inherited from class java.lang.Object

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

Constructor Detail

EncryptedPrivateKeyInfo

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

Create a new EncryptedPrivateKeyInfo object from raw encrypted data and the parameters used for encryption.

The encryptedData array is cloned.

Parameters:

params - The encryption algorithm parameters.

encryptedData - The encrypted key data.

Throws:

IllegalArgumentException - If the encryptedData array is empty (zero-length).

NoSuchAlgorithmException - If the algorithm specified in the parameters is not supported.

NullPointerException - If encryptedData is null.

EncryptedPrivateKeyInfo

public EncryptedPrivateKeyInfo(byte[] encoded)
                        throws IOException

Create a new EncryptedPrivateKeyInfo from an encoded representation, parsing the ASN.1 sequence.

Parameters:

encoded - The encoded info.

Throws:

IOException - If parsing the encoded data fails.

NullPointerException - If encoded is null.

EncryptedPrivateKeyInfo

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

Create a new EncryptedPrivateKeyInfo from the cipher name and the encrytpedData.

The encryptedData array is cloned.

Parameters:

algName - The name of the algorithm (as an object identifier).

encryptedData - The encrypted key data.

Throws:

IllegalArgumentException - If the encryptedData array is empty (zero-length).

NoSuchAlgorithmException - If algName is not the name of a supported algorithm.

NullPointerException - If encryptedData is null.

Method Detail

getAlgName

public String getAlgName()

Return the name of the cipher used to encrypt this key.

Returns:

The algorithm name.

getAlgParameters

public AlgorithmParameters getAlgParameters()

getEncoded

public byte[] getEncoded()
                  throws IOException

Throws:

IOException

getEncryptedData

public byte[] getEncryptedData()

getKeySpec

public PKCS8EncodedKeySpec getKeySpec(Cipher cipher)
                               throws InvalidKeySpecException

Throws:

InvalidKeySpecException