в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

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2010-05-31T14:47:30Z

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== new SecureRandom() ==



<source lang="java">

import java.math.BigInteger;
import java.security.SecureRandom;
import java.util.Random;
/*
*/
public class MainClass {
public static void main(String[] unused) {
Random prng = new SecureRandom(); // self-seeding
System.out.println(BigInteger.probablePrime(10, prng));
}

}

</source>



== SecureRandom: getInstance(String algorithm) throws NoSuchAlgorithmException ==



<source lang="java">

import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
public class Main {
public static void main(String[] args) throws NoSuchAlgorithmException {
int numBytes = (new Integer("1111")).intValue();
long seed = 01;
if (args.length > 1)
seed = (new Long("1111111111")).longValue();
SecureRandom srand = SecureRandom.getInstance("SHA1PRNG");
if (seed != 01)
srand.setSeed(seed);
byte[] bytes = new byte[numBytes];
srand.nextBytes(bytes);
System.out.println(new String(bytes));
}
}

</source>



== SecureRandom: nextBytes(byte[] bytes) ==



<source lang="java">

import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
public class Main {
public static void main(String[] args) throws NoSuchAlgorithmException {
int numBytes = (new Integer("1111")).intValue();
long seed = 01;
if (args.length > 1)
seed = (new Long("1111111111")).longValue();
SecureRandom srand = SecureRandom.getInstance("SHA1PRNG");
if (seed != 01)
srand.setSeed(seed);
byte[] bytes = new byte[numBytes];
srand.nextBytes(bytes);
System.out.println(new String(bytes));
}
}

</source>



== SecureRandom: setSeed(long seed) ==



<source lang="java">

import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
public class Main {
public static void main(String[] args) throws NoSuchAlgorithmException {
int numBytes = (new Integer("1111")).intValue();
long seed = 01;
if (args.length > 1)
seed = (new Long("1111111111")).longValue();
SecureRandom srand = SecureRandom.getInstance("SHA1PRNG");
if (seed != 01)
srand.setSeed(seed);
byte[] bytes = new byte[numBytes];
srand.nextBytes(bytes);
System.out.println(new String(bytes));
}
}

</source>

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Java by API/java.security/SecureRandom - История изменений

в 17:43, 31 мая 2010

Admin: 1 версия