iaik.pkcs.pkcs12

Class IvGenerator

java.lang.Object

javax.crypto.KeyGeneratorSpi

iaik.pkcs.pkcs12.IvGenerator

public class IvGenerator
extends javax.crypto.KeyGeneratorSpi

This class uses the KeyMaterialGenerator for deriving a PKCS#12 IV from a password, a salt and an iteration count.

Version:

File Revision 10

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.String	hash_algorithm
protected int	ID

Constructor Summary

Constructors

Constructor and Description
IvGenerator() Default Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected javax.crypto.SecretKey	engineGenerateKey() Generates the desired key material and returns it as a SecretKey.
protected void	engineInit(java.security.spec.AlgorithmParameterSpec params, java.security.SecureRandom random) Inits this KeyMaterialGenerator.
protected void	engineInit(int keylen, java.security.SecureRandom random) Sets the length of the key to generate.
protected void	engineInit(java.security.SecureRandom random) Not implemented.

Methods inherited from class java.lang.Object

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

Field Detail

ID

protected int ID

hash_algorithm

protected java.lang.String hash_algorithm

Constructor Detail

IvGenerator

public IvGenerator()

Default Constructor. Initializes the KeyMaterialGenerator for generating an IV for a symmetric CBC cipher.

Method Detail

engineInit

protected void engineInit(java.security.spec.AlgorithmParameterSpec params,
              java.security.SecureRandom random)
                   throws java.security.InvalidAlgorithmParameterException

Inits this KeyMaterialGenerator.

Specified by:

engineInit in class javax.crypto.KeyGeneratorSpi

Parameters:

params - the required parameters as PBEKeyAndParameterSpec

random - not needed by this key generator

Throws:

java.security.InvalidAlgorithmParameterException

engineInit

protected void engineInit(int keylen,
              java.security.SecureRandom random)

Sets the length of the key to generate.

Specified by:

engineInit in class javax.crypto.KeyGeneratorSpi

engineInit

protected void engineInit(java.security.SecureRandom random)

Not implemented.

Specified by:

engineInit in class javax.crypto.KeyGeneratorSpi

engineGenerateKey

protected javax.crypto.SecretKey engineGenerateKey()

Generates the desired key material and returns it as a SecretKey. Note that this method also returns IVs as SecretKey objects since there is no method for returning an IvParameterSpec. The algorithm name of the returned key is set to "RAW" and may be later changed by the calling application, if required:

 String algorithm = ...;
 KeyGenerator keyGen = KeyGenerator.getInstance("PKCS#12", "IAIK");
 ...
 iaik.security.cipher.SecretKey secretKey = (iaik.security.cipher.SecretKey)keyGen.generateKey();
 secretKey.setAlgorithm(algorithm);
 

Specified by:

engineGenerateKey in class javax.crypto.KeyGeneratorSpi