/**
* Digest password using the algorithm especificied and convert the result to a corresponding hex
* string. If exception, the plain credentials string is returned
*
* @param credentials Password or other credentials to use in authenticating this username
* @param algorithm Algorithm used to do th digest
*/
public static final String Digest(String credentials, String algorithm) {
try {
// Obtain a new message digest with "digest" encryption
MessageDigest md = (MessageDigest) MessageDigest.getInstance(algorithm).clone();
// encode the credentials
md.update(credentials.getBytes());
// Digest the credentials and return as hexadecimal
return (HexUtils.convert(md.digest()));
} catch (Exception ex) {
ex.printStackTrace();
return credentials;
}
}
/**
* Digest the password using the specified algorithm and convert the result to a corresponding
* hexadecimal string. If exception, the plain credentials string is returned.
*
* <p><strong>IMPLEMENTATION NOTE</strong> - This implementation is synchronized because it reuses
* the MessageDigest instance. This should be faster than cloning the instance on every request.
*
* @param credentials Password or other credentials to use in authenticating this username
*/
protected String digest(String credentials) {
// If no MessageDigest instance is specified, return unchanged
if (hasMessageDigest() == false) return (credentials);
// Digest the user credentials and return as hexadecimal
synchronized (this) {
try {
md.reset();
md.update(credentials.getBytes());
return (HexUtils.convert(md.digest()));
} catch (Exception e) {
log(sm.getString("realmBase.digest"), e);
return (credentials);
}
}
}
