com.devops4j.embedded.httpserver.BasicAuthenticator Maven / Gradle / Ivy
package com.devops4j.embedded.httpserver;
import org.apache.commons.codec.binary.Base64;
import sun.misc.BASE64Decoder;
/**
* BasicAuthenticator provides an implementation of HTTP Basic
* authentication. It is an abstract class and must be extended
* to provide an implementation of {@link #checkCredentials(String,String)}
* which is called to verify each incoming request.
*/
public abstract class BasicAuthenticator extends Authenticator {
protected String realm;
/**
* Creates a BasicAuthenticator for the given HTTP realm
* @param realm The HTTP Basic authentication realm
* @throws NullPointerException if the realm is an empty string
*/
public BasicAuthenticator (String realm) {
this.realm = realm;
}
/**
* returns the realm this BasicAuthenticator was created with
* @return the authenticator's realm string.
*/
public String getRealm () {
return realm;
}
public Result authenticate (HttpExchange t)
{
com.devops4j.embedded.httpserver.Headers rmap = t.getRequestHeaders();
/*
* look for auth token
*/
String auth = rmap.getFirst ("Authorization");
if (auth == null) {
Headers map = t.getResponseHeaders();
map.set ("WWW-Authenticate", "Basic realm=" + "\""+realm+"\"");
return new Retry(401);
}
int sp = auth.indexOf (' ');
if (sp == -1 || !auth.substring(0, sp).equals ("Basic")) {
return new Failure(401);
}
byte[] b = Base64.decodeBase64(auth.substring(sp + 1));
String userpass = new String (b);
int colon = userpass.indexOf (':');
String uname = userpass.substring (0, colon);
String pass = userpass.substring (colon+1);
if (checkCredentials (uname, pass)) {
return new Success(
new HttpPrincipal(
uname, realm
)
);
} else {
/* reject the request again with 401 */
Headers map = t.getResponseHeaders();
map.set ("WWW-Authenticate", "Basic realm=" + "\""+realm+"\"");
return new Failure(401);
}
}
/**
* called for each incoming request to verify the
* given name and password in the context of this
* Authenticator's realm. Any caching of credentials
* must be done by the implementation of this method
* @param username the username from the request
* @param password the password from the request
* @return true if the credentials are valid,
* false otherwise.
*/
public abstract boolean checkCredentials (String username, String password);
}