org.jasypt.salt

Class RandomSaltGenerator

java.lang.Object

org.jasypt.salt.RandomSaltGenerator

All Implemented Interfaces:

SaltGenerator

public class RandomSaltGenerator
extends java.lang.Object
implements SaltGenerator

This implementation of SaltGenerator holds a secure random generator which can be used for generating random salts for encryption or digesting.

The algorithm used for random number generation can be configured at instantiation time. If not, the default algorithm will be used.

This class is thread-safe.

Since:

1.2

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	DEFAULT_SECURE_RANDOM_ALGORITHM The default algorithm to be used for secure random number generation: set to SHA1PRNG.
private java.security.SecureRandom	random

Constructor Summary

Constructors

Constructor and Description
RandomSaltGenerator() Creates a new instance of RandomSaltGenerator using the default secure random number generation algorithm.
RandomSaltGenerator(java.lang.String secureRandomAlgorithm) Creates a new instance of RandomSaltGenerator specifying a secure random number generation algorithm.

Method Summary

Modifier and Type	Method and Description
byte[]	generateSalt(int lengthBytes) Generate a random salt of the specified length in bytes.
boolean	includePlainSaltInEncryptionResults() This salt generator needs the salt to be included unencrypted in encryption results, because of its being random.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_SECURE_RANDOM_ALGORITHM

public static final java.lang.String DEFAULT_SECURE_RANDOM_ALGORITHM

The default algorithm to be used for secure random number generation: set to SHA1PRNG.

See Also:

Constant Field Values

random

private final java.security.SecureRandom random

Constructor Detail

RandomSaltGenerator

public RandomSaltGenerator()

Creates a new instance of RandomSaltGenerator using the default secure random number generation algorithm.

RandomSaltGenerator

public RandomSaltGenerator(java.lang.String secureRandomAlgorithm)

Creates a new instance of RandomSaltGenerator specifying a secure random number generation algorithm.

Since:

1.5

Method Detail

generateSalt

public byte[] generateSalt(int lengthBytes)

Generate a random salt of the specified length in bytes.

Specified by:

generateSalt in interface SaltGenerator

Parameters:

lengthBytes - length in bytes.

Returns:

the generated salt.

includePlainSaltInEncryptionResults

public boolean includePlainSaltInEncryptionResults()

This salt generator needs the salt to be included unencrypted in encryption results, because of its being random. This method will always return true.

Specified by:

includePlainSaltInEncryptionResults in interface SaltGenerator

Returns:

true