![]() ![]() The doFinal() method of the Mac class is used to finish the Mac operation. The init() method of the Mac class accepts an Key object and initializes the current Mac object using the given key. Generate key using generateKey() method of the KeyGenerator class as shown below. Initialize the KeyGenerator object created in the previous step using this method. The KeyGenerator class provides a method named init() this method accepts the SecureRandom object and initializes the current KeyGenerator. ![]() SecureRandom secRandom = new SecureRandom() The SecureRandom class of the java.Security package provides a strong random number generator which is used to generate random numbers in Java. KeyGenerator keyGen = KeyGenerator.getInstance("DES") The KeyGenerator class provides getInstance() method which accepts a String variable representing the required key-generating algorithm and returns a KeyGenerator object that generates secret keys.Ĭreate KeyGenerator object using the getInstance() method as shown below. ![]() Follow the steps given below to create message authentication code using this class. In Java the Mac class of the javax.crypto package provides the functionality of message authentication code. The process of using MAC for authentication is depicted in the following illustration − For establishing MAC process, the sender and receiver share a symmetric key K.Įssentially, a MAC is an encrypted checksum generated on the underlying message that is sent along with a message to ensure message authentication. Neither option is particularly feasible.įor now, take this opportunity to test your Java applications on the latest incarnation of Java for Mac, and wait for the day when Apple makes the new version the default.MAC ( Message Authentication Code) algorithm is a symmetric key cryptographic technique to provide message authentication. In short, this means that if your Java application requires features of Java 5.0, then to run it on Mac OS X you’ll either need to bundle it as a Mac application and provide instructions for users who haven’t installed the update, or you’ll have to ask your users to modify the default Java version in use on their system. This first release of the new platform does not replace the default version of Java (1.4.2) on the system, but rather installs alongside it.īy default, therefore, Java 5.0 will only be used by Java programs bundled as Mac applications that contain an ist file that specify a JVMVersion of 1.5+ or 1.5*.Īlternatively, users may configure Java 5.0 to be the default version of Java on the system using the new Java Preferences utility included with the update. You’ll need to first upgrade to Mac OS X 10.4 (Tiger) to get this–previous versions of the operating system need not apply.Īpple is taking a cautious approach to the rollout of Java 5.0 for Mac. Also on the Java release front, Apple has finally released Java 5.0 for Mac OS X. ![]()
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