/* Copyright c 2005-2012.
* Licensed under GNU LESSER General Public License, Version 3.
* http://www.gnu.org/licenses
*/
package org.beangle.security.codec;
import java.security.MessageDigest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* 加密工具
*
* @author chaostone
*/
public class EncryptUtil {
private final static Logger logger = LoggerFactory.getLogger(EncryptUtil.class);
public static String encode(String password) {
return encode(password, "MD5");
}
/**
* Encode a string using algorithm specified in web.xml and return the
* resulting encrypted password. If exception, the plain credentials string
* is returned
*
* @param password
* Password or other credentials to use in authenticating this
* username
* @param algorithm
* Algorithm used to do the digest
* @return encypted password based on the algorithm.
*/
public static String encode(String password, String algorithm) {
byte[] unencodedPassword = password.getBytes();
MessageDigest md = null;
try {
// first create an instance, given the provider
md = MessageDigest.getInstance(algorithm);
} catch (Exception e) {
logger.error("Exception:{}", e);
return password;
}
md.reset();
// call the update method one or more times
// (useful when you don't know the size of your data, eg. stream)
md.update(unencodedPassword);
// now calculate the hash
byte[] encodedPassword = md.digest();
StringBuilder buf = new StringBuilder();
for (int i = 0; i < encodedPassword.length; i++) {
if ((encodedPassword[i] & 0xff) < 0x10) {
buf.append("0");
}
buf.append(Long.toString(encodedPassword[i] & 0xff, 16));
}
return buf.toString();
}
}