Getting the Bytes of a Generated Symmetric Key - Java Security

Java examples for Security:Key

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Description

Getting the Bytes of a Generated Symmetric Key

Demo Code

import java.security.NoSuchAlgorithmException;

import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class Main {

  public void m() {
    try {/*w  w w  .j ava  2  s  .  com*/
      // Generate a key
      KeyGenerator keyGen = KeyGenerator.getInstance("DESede");
      SecretKey key = keyGen.generateKey();

      // Get the bytes of the key
      byte[] keyBytes = key.getEncoded();
      int numBytes = keyBytes.length;

      // The bytes can be converted back to a SecretKey
      SecretKey key2 = new SecretKeySpec(keyBytes, "DESede");
      boolean b = key.equals(key2); // true
    } catch (NoSuchAlgorithmException e) {
    }
  }
}

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