org.xwiki.crypto.password.params

Class ScryptParameters

java.lang.Object

org.xwiki.crypto.password.params.KeyDerivationFunctionParameters

org.xwiki.crypto.password.params.ScryptParameters

public class ScryptParameters
extends KeyDerivationFunctionParameters

Key derivation function parameters for Scrypt functions.

Since:

5.4M1

Version:

$Id: f332481ea566da301559c953d9bf38ef727517ad $

Constructor Summary

Constructors

Constructor and Description
ScryptParameters() Initialize all parameters to default values, using a random salt, a cost parameter of , a parallelization parameter of and a block size of .
ScryptParameters(int keySize) Initialize key size and use a random salt, a cost parameter of , a parallelization parameter of and a block size of .
ScryptParameters(int keySize, byte[] salt) Initialize parameters to custom values, a cost parameter of , a parallelization parameter of and a block size of .
ScryptParameters(int keySize, int costParameter, int parallelizationParameter) Initialize parameters to custom values, use a random salt and a block size of .
ScryptParameters(int keySize, int costParameter, int parallelizationParameter, byte[] salt) Initialize parameters to custom values and use a block size of .
ScryptParameters(int keySize, int costParameter, int parallelizationParameter, int blockSize) Initialize all parameters to custom values and use a random salt.
ScryptParameters(int keySize, int costParameter, int parallelizationParameter, int blockSize, byte[] salt) Initialize all parameters to custom values.

Method Summary

Modifier and Type	Method and Description
String	getAlgorithmName()
int	getBlockSize()
int	getCostParameter()
int	getParallelizationParameter()
byte[]	getSalt()

Methods inherited from class org.xwiki.crypto.password.params.KeyDerivationFunctionParameters

getKeySize

Methods inherited from class java.lang.Object

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

Constructor Detail

ScryptParameters

public ScryptParameters()

Initialize all parameters to default values, using a random salt, a cost parameter of , a parallelization parameter of and a block size of .

ScryptParameters

public ScryptParameters(int keySize)

Initialize key size and use a random salt, a cost parameter of , a parallelization parameter of and a block size of .

Parameters:

keySize - Size of key to be generated in bytes. A negative value means that the key length should be smartly deducted from the context of use.

ScryptParameters

public ScryptParameters(int keySize,
                        byte[] salt)

Initialize parameters to custom values, a cost parameter of , a parallelization parameter of and a block size of .

Parameters:

keySize - Size of key to be generated in bytes. A negative value means that the key length should be smartly deducted from the context of use.

salt - a salt.

ScryptParameters

public ScryptParameters(int keySize,
                        int costParameter,
                        int parallelizationParameter)

Initialize parameters to custom values, use a random salt and a block size of .

Parameters:

keySize - Size of key to be generated in bytes. A negative value means that the key length should be smartly deducted from the context of use.

costParameter - CPU/Memory cost parameter, must be larger than 1, a power of 2.

parallelizationParameter - Parallelization parameter, a positive integer less than or equal to (2^37-32) / 1024

ScryptParameters

public ScryptParameters(int keySize,
                        int costParameter,
                        int parallelizationParameter,
                        byte[] salt)

Initialize parameters to custom values and use a block size of .

Parameters:

keySize - Size of key to be generated in bytes. A negative value means that the key length should be smartly deducted from the context of use.

costParameter - CPU/Memory cost parameter, must be larger than 1, a power of 2.

parallelizationParameter - Parallelization parameter, a positive integer less than or equal to (2^37-32) / 1024

salt - a salt.

ScryptParameters

public ScryptParameters(int keySize,
                        int costParameter,
                        int parallelizationParameter,
                        int blockSize)

Initialize all parameters to custom values and use a random salt.

Parameters:

keySize - Size of key to be generated in bytes. A negative value means that the key length should be smartly deducted from the context of use.

costParameter - CPU/Memory cost parameter, must be larger than 1, a power of 2 and less than 2^(16 * blockSize)

parallelizationParameter - Parallelization parameter, a positive integer less than or equal to (2^37-32) / (128 * blockSize)

blockSize - Block size parameter.

ScryptParameters

public ScryptParameters(int keySize,
                        int costParameter,
                        int parallelizationParameter,
                        int blockSize,
                        byte[] salt)

Initialize all parameters to custom values.

Parameters:

keySize - Size of key to be generated in bytes. A negative value means that the key length should be smartly deducted from the context of use.

costParameter - CPU/Memory cost parameter, must be larger than 1, a power of 2 and less than 2^(16 * blockSize)

parallelizationParameter - Parallelization parameter, a positive integer less than or equal to (2^37-32) / (128 * blockSize)

blockSize - Block size parameter.

salt - a salt.

Method Detail

getAlgorithmName

public String getAlgorithmName()

Overrides:

getAlgorithmName in class KeyDerivationFunctionParameters

Returns:

the algorithm name (hint) of the Key Derivation Function that use these parameters.

getCostParameter

public int getCostParameter()

Returns:

the CPU/Memory cost parameter N.

getParallelizationParameter

public int getParallelizationParameter()

Returns:

the parallelization parameter.

getSalt

public byte[] getSalt()

Returns:

the salt value.

getBlockSize

public int getBlockSize()

Returns:

the block size parameter r.