com.sun.enterprise.universal.security.SecurityUtils Maven / Gradle / Ivy
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package com.sun.enterprise.universal.security;
import java.security.SecureRandom;
/**
* Created October 28, 2010
* @author Byron Nevins
*/
public final class SecurityUtils {
public static String getSecureRandomHexString(int numBytes) {
SecureRandom random = new SecureRandom();
byte[] bb = new byte[numBytes];
random.nextBytes(bb);
return toHexString(bb);
}
/**
* No instances allowed.
*/
private SecurityUtils() {
}
static private String toHexString(byte b) {
String s = Integer.toHexString((int) b + 128);
if (s.length() == 1)
s = "0" + s;
return s;
}
static private String toHexString(byte[] bb) {
StringBuilder sb = new StringBuilder();
for (byte b : bb)
sb.append(toHexString(b));
return sb.toString();
}
}