[jboss-user] [JBoss Seam] - How to decode hash password?

LockDog do-not-reply at jboss.com
Wed Oct 17 13:22:51 EDT 2007


Seamspace example:

package org.teamdev.librarian.user;
  | 
  | import org.apache.commons.codec.binary.Hex;
  | import org.jboss.seam.Component;
  | import org.jboss.seam.annotations.Name;
  | 
  | import java.security.MessageDigest;
  | 
  | @Name("hash")
  | public class Hash {
  |     String hashFunction = "MD5";
  |     String charset = "UTF-8";
  | 
  |     public String hash(String password) {
  |         try {
  |             MessageDigest md = MessageDigest.getInstance(hashFunction);
  |             md.update(password.getBytes(charset));
  |             byte[] raw = md.digest();
  |             return new String(Hex.encodeHex(raw));
  |         }
  |         catch (Exception e) {
  |             throw new RuntimeException(e);
  |         }
  |     }
  | 
  |     public String getCharset() {
  |         return charset;
  |     }
  | 
  |     public void setCharset(String charset) {
  |         this.charset = charset;
  |     }
  | 
  |     public String getHashFunction() {
  |         return hashFunction;
  |     }
  | 
  |     public void setHashFunction(String hashFunction) {
  |         this.hashFunction = hashFunction;
  |     }
  | 
  |     public static Hash instance() {
  |         return (Hash) Component.getInstance(Hash.class);
  |     }
  | }

How to decode (unhash) password?

    public String unHash(String hashedPassword) {
  |         try {
  |             MessageDigest md = MessageDigest.getInstance(hashFunction);
  |             md.update(hashedPassword.getBytes(charset));
  |             char[] raw = md.digest().toString().toCharArray();
  |             return new String(Hex.decodeHex(raw));
  |         }
  |         catch (Exception e) {
  |             throw new RuntimeException(e);
  |         }
  |     }

Don't work =(

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