Calculate MD5 Hash of File (or SHA-1, and other hash algorithms)

Demonstrates how to calculate a hash for a file's contents.

Download Chilkat Java Library

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    CkCrypt2 crypt = new CkCrypt2();

    boolean success;
    success = crypt.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println("Crypt component unlock failed");
        return;
    }

    //  Set the name of the hash algorithm.
    //  Other choices include "sha1", "sha384", "sha512", "md2", "md5", and "haval".
    crypt.put_HashAlgorithm("md5");

    //  EncodingMode specifies the encoding of the hash output.
    //  It may be "hex", "url", "base64", or "quoted-printable".
    crypt.put_EncodingMode("hex");

    //  Files of any type may be hashed -- it doesn't matter
    //  if the file is binary or text...
    String hashStr;
    hashStr = crypt.hashFileENC("c:/temp/something.dat");

    System.out.println(hashStr);


  }
}