Example usage for java.security DigestInputStream on

Introduction

In this page you can find the example usage for java.security DigestInputStream on.

Prototype

boolean on

To view the source code for java.security DigestInputStream on.

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Usage

From source file:Main.java

public static void main(String args[]) throws Exception {
    FileInputStream fis = new FileInputStream("test");
    MessageDigest md = MessageDigest.getInstance("SHA");
    DigestInputStream dis = new DigestInputStream(fis, md);
    ObjectInputStream ois = new ObjectInputStream(dis);
    Object o = ois.readObject();//from   w  w  w  .jav a 2 s . c om
    if (!(o instanceof String)) {
        System.out.println("Unexpected data in file");
        System.exit(-1);
    }
    String data = (String) o;
    System.out.println("Got message " + data);
    dis.on(false);
    o = ois.readObject();
    if (!(o instanceof byte[])) {
        System.out.println("Unexpected data in file");
        System.exit(-1);
    }
    byte origDigest[] = (byte[]) o;
    System.out.println(MessageDigest.isEqual(md.digest(), origDigest));
}

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