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java.security
abstract public class: SecureRandomSpi [javadoc | source]
java.lang.Object
   java.security.SecureRandomSpi

All Implemented Interfaces:
    java$io$Serializable

This class defines the Service Provider Interface (SPI) for the SecureRandom class. All the abstract methods in this class must be implemented by each service provider who wishes to supply the implementation of a cryptographically strong pseudo-random number generator.
Method from java.security.SecureRandomSpi Summary:
engineGenerateSeed,   engineNextBytes,   engineSetSeed
Methods from java.lang.Object:
clone,   equals,   finalize,   getClass,   hashCode,   notify,   notifyAll,   toString,   wait,   wait,   wait
Method from java.security.SecureRandomSpi Detail:
 abstract protected byte[] engineGenerateSeed(int numBytes)
    Returns the given number of seed bytes. This call may be used to seed other random number generators.
 abstract protected  void engineNextBytes(byte[] bytes)
    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.

 abstract protected  void engineSetSeed(byte[] seed)
    Reseeds this random object. The given seed supplements, rather than replaces, the existing seed. Thus, repeated calls are guaranteed never to reduce randomness.