org.silverpeas.util.crypto
Class CryptMD5

java.lang.Object
  org.silverpeas.util.crypto.CryptMD5

public class CryptMD5
extends Object

The MD5 algorithm (Message Digest 5).

It is a one-way hashing function that compute a 128-bit digest of a message (generally a file). It is not for encrypting password but for generating a digest of a content in order to sign it and to ensure its integrity.

A first flaw (possibility to create collisions at the demand) was discovered in 1996. In 2004, a chinese team broke it by discovering full collisions. Since, it was replaced first by the SHA-1 algorithm and now the SHA-2 algorithms are used (SHA-256, SHA-512).

Constructor Summary

CryptMD5()

Method Summary

static String	encrypt(File file) Computes the MD5 hash of a file.
static String	encrypt(String original) Encrypts the specified text in MD5.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CryptMD5

public CryptMD5()

Method Detail

encrypt

public static String encrypt(String original)
                      throws UtilException

Encrypts the specified text in MD5.

Parameters:

original - the text to encrypt

Returns:

the digest of the text in a 32-bits hexadecimal.

Throws:

UtilException

encrypt

public static String encrypt(File file)
                      throws UtilException

Computes the MD5 hash of a file.

Parameters:

file - the file to be MD5 hashed.

Returns:

the MD5 hash as a String.

Throws:

UtilException