com.goterl.lazysodium.interfaces

Interface Random

All Known Implementing Classes:

LazySodium, LazySodiumJava

public interface Random

Method Summary

Modifier and Type	Method and Description
byte[]	nonce(int size) Get a random number of bytes to use in a nonce.
byte[]	randomBytesBuf(int size) Get a random number of bytes.
byte[]	randomBytesDeterministic(int size, byte[] seed) Get deterministically random bytes given a seed.
long	randomBytesRandom() Return a unsigned int byte 0 and 0xffffffff included.
long	randomBytesUniform(int upperBound) Returns an unpredictable value between 0 and upperBound (excluded).

Method Detail

randomBytesRandom

long randomBytesRandom()

Return a unsigned int byte 0 and 0xffffffff included.

Returns:

A random byte.

randomBytesUniform

long randomBytesUniform(int upperBound)

Returns an unpredictable value between 0 and upperBound (excluded). Unlike randombytes_random() % upper_bound, it guarantees a uniform distribution of the possible output values even when upper_bound is not a power of 2. Note that an upper_bound less than 2 leaves only a single element to be chosen, namely 0.

Parameters:

upperBound -

Returns:

A uniformly random unsigned int.

randomBytesBuf

byte[] randomBytesBuf(int size)

Get a random number of bytes.

Parameters:

size - The length of the byte array to return.

Returns:

Random byte array.

randomBytesDeterministic

byte[] randomBytesDeterministic(int size,
                                byte[] seed)

Get deterministically random bytes given a seed.

Parameters:

size - Size of byte array to return.

seed - Seed to provide.

Returns:

Deterministically random byte array.

nonce

byte[] nonce(int size)

Get a random number of bytes to use in a nonce.

Parameters:

size - The size of the byte array to return.

Returns:

Random nonce array.

See Also:

randomBytesBuf(int)