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Java > Open Source Codes > com > jcorporate > expresso > core > security > weakencryption > RandomNumber


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64
65 package com.jcorporate.expresso.core.security.weakencryption;
66
67 import com.jcorporate.expresso.core.security.AbstractRandomNumber;
68 import com.jcorporate.expresso.kernel.exception.ChainedException;
69
70 import java.util.Random JavaDoc;
71
72
73 /**
74  * Weak version of the Randum Number Generator. This version only uses
75  * the standard PRNG and nothing even close to cryptographic strength.
76  *
77  * @author Michael Rimov
78  */
79 public final class RandomNumber
80         extends AbstractRandomNumber {
81     private Random JavaDoc rand = null;
82
83     /**
84      * Default Constructor
85      *
86      * @throws ChainedException if unable to instantiate the SHA1 Random
87      * number generator
88      */
89     public RandomNumber()
90             throws ChainedException {
91         rand = new Random JavaDoc();
92     } /* RandomNumber() */
93
94     /**
95      * getRandomBytes - Returns a byte array of random bytes. The derived
96      * class determines the actual method used for getting the random data.
97      *
98      * @param numBytes The number of bytes to retrieve
99      * @return An array of random bytes
100      */
101     public byte[] getRandomBytes(int numBytes) {
102         byte[] newBytes = new byte[numBytes];
103         rand.nextBytes(newBytes);
104
105         return newBytes;
106     } /* getRandomBytes(int) */
107
108 } /* RandomNumber */
109
110 /* RandomNumber */
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