com.microej.crypto.internal.securerandom

Class NativeSecureRandomSpi

java.lang.Object

java.security.SecureRandomSpi

com.microej.crypto.internal.securerandom.NativeSecureRandomSpi

All Implemented Interfaces:

Serializable

public class NativeSecureRandomSpi
extends SecureRandomSpi

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
NativeSecureRandomSpi()

Method Summary

Modifier and Type	Method and Description
protected byte[]	engineGenerateSeed(int numBytes) Returns the given number of seed bytes.
protected void	engineNextBytes(byte[] bytes) Generates a user-specified number of random bytes.
protected void	engineSetSeed(byte[] seed) Reseeds this random object.
static void	nativeClose(int nativeId) Closes the native resource.
static void	nativeGenerateSeed(int nativeId, byte[] bytes, int numBytes) Generates a seed.
static int	nativeInit() Initializes the native resource.
static void	nativeNextBytes(int nativeId, byte[] bytes, int numBytes) Generates random bytes.
static void	nativeSetSeed(int nativeId, byte[] seed, int seedLength) Sets the PRNG seed.

Methods inherited from class java.lang.Object

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

Constructor Detail

NativeSecureRandomSpi

public NativeSecureRandomSpi()

Method Detail

engineGenerateSeed

protected byte[] engineGenerateSeed(int numBytes)

Description copied from class: SecureRandomSpi

Returns the given number of seed bytes. This call may be used to seed other random number generators.

Specified by:

engineGenerateSeed in class SecureRandomSpi

Parameters:

numBytes - the number of seed bytes to generate.

Returns:

the seed bytes.

engineNextBytes

protected void engineNextBytes(byte[] bytes)

Description copied from class: SecureRandomSpi

Generates a user-specified number of random bytes.

If a call to engineSetSeed had not occurred previously, the first call to this method forces this SecureRandom implementation to seed itself. This self-seeding will not occur if engineSetSeed was previously called.

Specified by:

engineNextBytes in class SecureRandomSpi

Parameters:

bytes - the array to be filled in with random bytes.

engineSetSeed

protected void engineSetSeed(byte[] seed)

Description copied from class: SecureRandomSpi

Reseeds this random object. The given seed supplements, rather than replaces, the existing seed. Thus, repeated calls are guaranteed never to reduce randomness.

Specified by:

engineSetSeed in class SecureRandomSpi

Parameters:

seed - the seed.

nativeClose

public static void nativeClose(int nativeId)
                        throws NativeException

Closes the native resource.

Parameters:

nativeId - the resource id

Throws:

NativeException

nativeGenerateSeed

public static void nativeGenerateSeed(int nativeId,
                                      byte[] bytes,
                                      int numBytes)
                               throws NativeException

Generates a seed.

Parameters:

nativeId - the resource id

bytes - the seed array to fill with random bytes

numBytes - the seed size in bytes

Throws:

NativeException

nativeInit

public static int nativeInit()
                      throws NativeException

Initializes the native resource.

Returns:

a nativeId

Throws:

NativeException

nativeNextBytes

public static void nativeNextBytes(int nativeId,
                                   byte[] bytes,
                                   int numBytes)
                            throws NativeException

Generates random bytes.

Parameters:

nativeId - the resource id

bytes - the array to fill with random bytes

numBytes - the number of bytes to generate

Throws:

NativeException

nativeSetSeed

public static void nativeSetSeed(int nativeId,
                                 byte[] seed,
                                 int seedLength)
                          throws NativeException

Sets the PRNG seed.

Parameters:

nativeId - the resource id

seed - the seed to use

Throws:

NativeException