com.ibm.crypto.provider
Class SHA1PRNG

java.lang.Object
  extended by java.security.SecureRandomSpi
      extended by com.ibm.crypto.provider.SHA1PRNG
All Implemented Interfaces:
Serializable

public final class SHA1PRNG
extends SecureRandomSpi
implements Serializable

This class provides a cryptographically strong pseudo-random number generator based on the SHA1 message digest algorithm. Note that if a seed is not provided, we will generate a seed from a true random number generator(TRNG).

See Also:
Serialized Form

Constructor Summary
SHA1PRNG()
           
SHA1PRNG(byte[] seed)
           
 
Method Summary
 byte[] engineGenerateSeed(int numBytes)
           
 void engineNextBytes(byte[] bytes)
           
 void engineSetSeed(byte[] seed)
           
protected  byte[] internalGenerateSeed(int numBytes)
           
protected  void internalNextBytes(byte[] bytes)
           
protected  void internalSetSeed(byte[] seed)
           
 boolean isFipsApproved()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SHA1PRNG

public SHA1PRNG()

SHA1PRNG

public SHA1PRNG(byte[] seed)
Method Detail

isFipsApproved

public boolean isFipsApproved()
See Also:
com.ibm.crypto.fips.provider.AlgorithmStatus#isFipsApproved()

engineSetSeed

public void engineSetSeed(byte[] seed)
Specified by:
engineSetSeed in class SecureRandomSpi

internalSetSeed

protected void internalSetSeed(byte[] seed)

engineNextBytes

public void engineNextBytes(byte[] bytes)
Specified by:
engineNextBytes in class SecureRandomSpi

internalNextBytes

protected void internalNextBytes(byte[] bytes)

engineGenerateSeed

public byte[] engineGenerateSeed(int numBytes)
Specified by:
engineGenerateSeed in class SecureRandomSpi

internalGenerateSeed

protected byte[] internalGenerateSeed(int numBytes)