org.bouncycastle.crypto.CipherKeyGenerator Maven / Gradle / Ivy
package org.bouncycastle.crypto;
import java.security.SecureRandom;
/**
* The base class for symmetric, or secret, cipher key generators.
*/
public class CipherKeyGenerator
{
protected SecureRandom random;
protected int strength;
/**
* initialise the key generator.
*
* @param param the parameters to be used for key generation
*/
public void init(
KeyGenerationParameters param)
{
this.random = param.getRandom();
this.strength = (param.getStrength() + 7) / 8;
}
/**
* generate a secret key.
*
* @return a byte array containing the key value.
*/
public byte[] generateKey()
{
byte[] key = new byte[strength];
random.nextBytes(key);
return key;
}
}