Package org.bouncycastle.crypto

Class PBEParametersGenerator

java.lang.Object

org.bouncycastle.crypto.PBEParametersGenerator

Direct Known Subclasses:

OpenSSLPBEParametersGenerator, PKCS12ParametersGenerator, PKCS5S1ParametersGenerator, PKCS5S2ParametersGenerator

public abstract class PBEParametersGenerator
extends Object

super class for all Password Based Encryption (PBE) parameter generator classes.

Field Summary

Fields

Modifier and Type	Field	Description
protected int	iterationCount
protected byte[]	password
protected byte[]	salt

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PBEParametersGenerator()	base constructor.

Method Summary

Modifier and Type	Method	Description
abstract CipherParameters	generateDerivedMacParameters(int keySize)	generate derived parameters for a key of length keySize, specifically for use with a MAC.
abstract CipherParameters	generateDerivedParameters(int keySize)	generate derived parameters for a key of length keySize.
abstract CipherParameters	generateDerivedParameters(int keySize, int ivSize)	generate derived parameters for a key of length keySize, and an initialisation vector (IV) of length ivSize.
int	getIterationCount()	return the iteration count.
byte[]	getPassword()	return the password byte array.
byte[]	getSalt()	return the salt byte array.
void	init(byte[] password, byte[] salt, int iterationCount)	initialise the PBE generator.
static byte[]	PKCS12PasswordToBytes(char[] password)	converts a password to a byte array according to the scheme in PKCS12 (unicode, big endian, 2 zero pad bytes at the end).
static byte[]	PKCS5PasswordToBytes(char[] password)	converts a password to a byte array according to the scheme in PKCS5 (ascii, no padding)
static byte[]	PKCS5PasswordToUTF8Bytes(char[] password)	converts a password to a byte array according to the scheme in PKCS5 (UTF-8, no padding)

Methods inherited from class java.lang.Object

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

Field Details

password

protected byte[] password

salt

protected byte[] salt

iterationCount

protected int iterationCount

Constructor Details

PBEParametersGenerator

protected PBEParametersGenerator()

base constructor.

Method Details

init

public void init(byte[] password,
 byte[] salt,
 int iterationCount)

initialise the PBE generator.

Parameters:

password - the password converted into bytes (see below).

salt - the salt to be mixed with the password.

iterationCount - the number of iterations the "mixing" function is to be applied for.

getPassword

public byte[] getPassword()

return the password byte array.

Returns:

the password byte array.

getSalt

public byte[] getSalt()

return the salt byte array.

Returns:

the salt byte array.

getIterationCount

public int getIterationCount()

return the iteration count.

Returns:

the iteration count.

generateDerivedParameters

public abstract CipherParameters generateDerivedParameters(int keySize)

generate derived parameters for a key of length keySize.

Parameters:

keySize - the length, in bits, of the key required.

Returns:

a parameters object representing a key.

generateDerivedParameters

public abstract CipherParameters generateDerivedParameters(int keySize,
 int ivSize)

generate derived parameters for a key of length keySize, and an initialisation vector (IV) of length ivSize.

Parameters:

keySize - the length, in bits, of the key required.

ivSize - the length, in bits, of the iv required.

Returns:

a parameters object representing a key and an IV.

generateDerivedMacParameters

public abstract CipherParameters generateDerivedMacParameters(int keySize)

generate derived parameters for a key of length keySize, specifically for use with a MAC.

Parameters:

keySize - the length, in bits, of the key required.

Returns:

a parameters object representing a key.

PKCS5PasswordToBytes

public static byte[] PKCS5PasswordToBytes(char[] password)

converts a password to a byte array according to the scheme in PKCS5 (ascii, no padding)

Parameters:

password - a character array representing the password.

Returns:

a byte array representing the password.

PKCS5PasswordToUTF8Bytes

public static byte[] PKCS5PasswordToUTF8Bytes(char[] password)

converts a password to a byte array according to the scheme in PKCS5 (UTF-8, no padding)

Parameters:

password - a character array representing the password.

Returns:

a byte array representing the password.

PKCS12PasswordToBytes

public static byte[] PKCS12PasswordToBytes(char[] password)

converts a password to a byte array according to the scheme in PKCS12 (unicode, big endian, 2 zero pad bytes at the end).

Parameters:

password - a character array representing the password.

Returns:

a byte array representing the password.