MD5 MessageDigest

 
/*
 * file MD5.java
 *
 * This file is part of SourceHeader project.
 *
 * SourceHeader is software for easier maintaining source files' headers.
 * project web: http://code.google.com/p/source-header/
 * author: Steve Sindelar
 * licence: New BSD Licence
 * 
 * (c) Steve Sindelar
 */

//package sourceheader.core.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * 
 * @author steve
 */
public class MD5 {
  public static String create(String content) throws MD5IsNotSupported {
    String result = "";
    try {
      byte[] defaultBytes = content.getBytes();
      MessageDigest algorithm = MessageDigest.getInstance("MD5");
      algorithm.reset();
      algorithm.update(defaultBytes);
      byte messageDigest[] = algorithm.digest();

      StringBuffer hexString = new StringBuffer();
      for (int i = 0; i < messageDigest.length; i++) {
        hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
      }
      result = hexString.toString();
    } catch (NoSuchAlgorithmException ex) {
      throw new MD5IsNotSupported(ex);
    }

    assert !result.isEmpty();
    return result;
  }

  public static class MD5IsNotSupported extends NoSuchAlgorithmException {
    public MD5IsNotSupported(Throwable exception) {
      super("MD5 algorithm is not implemented in this java.", exception);
    }
  }
}

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MD5 MessageDigest : MD5 « Security « Java

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