java.lang.Object
java.security.VMSecureRandom
- final class VMSecureRandom
- extends java.lang.Object
VM-specific methods for generating real (or almost real) random
seeds. VM implementors should write a version of this class that
reads random bytes from some system source.
The default implementation of this class runs eight threads that
increment counters in a tight loop, and XORs each counter to
produce one byte of seed data. This is not very efficient, and is
not guaranteed to be random (the thread scheduler is probably
deterministic, after all). If possible, VM implementors should
reimplement this class so it obtains a random seed from a system
facility, such as a system entropy gathering device or hardware
random number generator.
|
Method Summary |
(package private) static int |
generateSeed(byte[] buffer,
int offset,
int length)
Generate a random seed. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
VMSecureRandom
VMSecureRandom()
generateSeed
static int generateSeed(byte[] buffer,
int offset,
int length)
- Generate a random seed. Implementations are free to generate
fewer random bytes than are requested, and leave the remaining
bytes of the destination buffer as zeros. Implementations SHOULD,
however, make a best-effort attempt to satisfy the request.
JAVADOC | 
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