| 44 |
|
* |
| 45 |
|
* <p>Instances of {@code ThreadLocalRandom} are not cryptographically |
| 46 |
|
* secure. Consider instead using {@link java.security.SecureRandom} |
| 47 |
< |
* in security-sensitive applications. Additionally, instances do not |
| 48 |
< |
* use a cryptographically random seed unless the {@linkplain |
| 49 |
< |
* System#getProperty system property} {@code |
| 50 |
< |
* java.util.secureRandomSeed} is set to {@code true}. |
| 47 |
> |
* in security-sensitive applications. |
| 48 |
|
* |
| 49 |
|
* @since 1.7 |
| 50 |
|
* @author Doug Lea |
| 102 |
|
/** |
| 103 |
|
* The next seed for default constructors. |
| 104 |
|
*/ |
| 105 |
< |
private static final AtomicLong seeder = new AtomicLong(initialSeed()); |
| 106 |
< |
|
| 107 |
< |
private static long initialSeed() { // same as SplittableRandom |
| 111 |
< |
try { // ignore exceptions in accessing/parsing properties |
| 112 |
< |
String pp = System.getProperty |
| 113 |
< |
("java.util.secureRandomSeed"); |
| 114 |
< |
if (pp != null && pp.equalsIgnoreCase("true")) { |
| 115 |
< |
byte[] seedBytes = java.security.SecureRandom.getSeed(8); |
| 116 |
< |
long s = (long)(seedBytes[0]) & 0xffL; |
| 117 |
< |
for (int i = 1; i < 8; ++i) |
| 118 |
< |
s = (s << 8) | ((long)(seedBytes[i]) & 0xffL); |
| 119 |
< |
return s; |
| 120 |
< |
} |
| 121 |
< |
} catch (Exception ignore) { |
| 122 |
< |
} |
| 123 |
< |
int hh = 0; // hashed host address |
| 124 |
< |
try { |
| 125 |
< |
hh = InetAddress.getLocalHost().hashCode(); |
| 126 |
< |
} catch (Exception ignore) { |
| 127 |
< |
} |
| 128 |
< |
return (mix64((((long)hh) << 32) ^ System.currentTimeMillis()) ^ |
| 129 |
< |
mix64(System.nanoTime())); |
| 130 |
< |
} |
| 131 |
< |
|
| 105 |
> |
private static final AtomicLong seeder = |
| 106 |
> |
new AtomicLong(mix64(System.currentTimeMillis()) ^ |
| 107 |
> |
mix64(System.nanoTime())); |
| 108 |
|
/** |
| 109 |
|
* The seed increment |
| 110 |
|
*/ |
