本文整理汇总了Java中java.security.SecureRandom.reseed方法的典型用法代码示例。如果您正苦于以下问题：Java SecureRandom.reseed方法的具体用法？Java SecureRandom.reseed怎么用？Java SecureRandom.reseed使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类java.security.SecureRandom的用法示例。
在下文中一共展示了SecureRandom.reseed方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: main
import java.security.SecureRandom; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception {
SecureRandom sr;
boolean pass = true;
for (String mech : new String[]{"Hash_DRBG", "HMAC_DRBG", "CTR_DRBG"}) {
try {
System.out.println("Testing " + mech + "...");
Security.setProperty("securerandom.drbg.config", mech);
// Check auto reseed works
sr = SecureRandom.getInstance("DRBG");
sr.nextInt();
sr = SecureRandom.getInstance("DRBG");
sr.reseed();
sr = SecureRandom.getInstance("DRBG");
sr.generateSeed(10);
} catch (Exception e) {
pass = false;
e.printStackTrace(System.out);
}
}
if (!pass) {
throw new RuntimeException("At least one test case failed");
}
}
示例2: test
import java.security.SecureRandom; //导入方法依赖的package包/类
public static void test(SecureRandom sr, int tnum, int rnum)
throws Exception {
System.out.println(sr);
System.out.println(sr.getAlgorithm() + " " + sr.getProvider().getName());
System.out.println(new Date());
boolean reseed = sr.getParameters() != null;
Thread[] threads = new Thread[tnum];
AtomicBoolean failed = new AtomicBoolean(false);
Thread.UncaughtExceptionHandler h = (t, e) -> {
failed.set(true);
e.printStackTrace();
};
for (int i = 0; i < threads.length; i++) {
threads[i] = new Thread() {
@Override
public void run() {
for (int j = 0; j < rnum; j++) {
sr.nextBytes(new byte[j%100+100]);
sr.setSeed((long)j);
if (reseed) {
sr.reseed();
}
}
}
};
threads[i].setUncaughtExceptionHandler(h);
threads[i].start();
}
for (int i = 0; i < threads.length; i++) {
threads[i].join();
}
System.out.println(new Date());
System.out.println();
if (failed.get()) {
throw new RuntimeException("Failed");
}
}
示例3: main
import java.security.SecureRandom; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception {
byte[] result = new byte[10];
MyES es = new MyES();
// Set es as the default entropy source, overriding SeedGenerator.
setDefaultSeeder(es);
// Nothing happened yet
es.checkUsage(0);
SecureRandom sr;
sr = SecureRandom.getInstance("DRBG");
// No entropy reading if only getInstance
es.checkUsage(0);
// Entropy is read at 1st nextBytes of the 1st DRBG
sr.nextInt();
es.checkUsage(1);
for (String mech : new String[]{"Hash_DRBG", "HMAC_DRBG", "CTR_DRBG"}) {
System.out.println("Testing " + mech + "...");
// DRBG with pr_false will never read entropy again no matter
// if nextBytes or reseed is called.
Security.setProperty("securerandom.drbg.config", mech);
sr = SecureRandom.getInstance("DRBG");
sr.nextInt();
sr.reseed();
es.checkUsage(0);
// DRBG with pr_true always read from default entropy, and
// its nextBytes always reseed itself
Security.setProperty("securerandom.drbg.config",
mech + ",pr_and_reseed");
sr = SecureRandom.getInstance("DRBG");
sr.nextInt();
es.checkUsage(2); // one instantiate, one reseed
sr.nextInt();
es.checkUsage(1); // one reseed in nextBytes
sr.reseed();
es.checkUsage(1); // one reseed
sr.nextBytes(result, DrbgParameters.nextBytes(-1, false, null));
es.checkUsage(0); // pr_false for this call
sr.nextBytes(result, DrbgParameters.nextBytes(-1, true, null));
es.checkUsage(1); // pr_true for this call
sr.reseed(DrbgParameters.reseed(true, null));
es.checkUsage(1); // reseed from es
sr.reseed(DrbgParameters.reseed(false, null));
es.checkUsage(0); // reseed from AbstractDrbg.SeederHolder.seeder
}
}