AEM 6550 - Log AEM Form Login User (j_username) Password (j_password) doing j_security_check Authentication

If you are unsure the user authentication information like j_username, j_password are passed to /libs/granite/core/content/login.html/j_security_check or being stripped off from the request by intermediate proxies before reaching AEM, you can use the following code to log them... 

FOR DEBUGGING PURPOSES ON DEV INSTANCES ONLY, NOT PRODUCTION

Package Install | Github

Solution

Add the following custom authentication handler in a separate bundle (independent of your project) or install this package with the auth handler and log configuration logging to http://localhost:4502/system/console/slinglog/tailer.txt?tail=10000&grep=*&name=%2Flogs%2Feaem-jsecurity.log

package apps.experienceaem.assets;

import org.apache.sling.auth.core.spi.AuthenticationHandler;
import org.apache.sling.auth.core.spi.AuthenticationInfo;
import org.apache.sling.jcr.api.SlingRepository;
import org.apache.sling.auth.core.spi.AuthenticationFeedbackHandler;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.jcr.Session;
import javax.jcr.SimpleCredentials;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

import static org.osgi.framework.Constants.SERVICE_RANKING;

@Component(
        service = { AuthenticationHandler.class },
        immediate = true,
        property = {
                SERVICE_RANKING + ":Integer=" + 9999,
                AuthenticationHandler.PATH_PROPERTY + "=/libs/granite/core/content/login.html/j_security_check",
                AuthenticationHandler.TYPE_PROPERTY + "=" + "EAEM_RECORD_CREDS",
                "service.description=Experience AEM Log j_security_check User Password Credentials"
        })
public class EAEMRecordUserPassAuthHandler implements AuthenticationHandler, AuthenticationFeedbackHandler {

    private static final Logger log = LoggerFactory.getLogger(EAEMRecordUserPassAuthHandler.class);

    private static final String REQUEST_METHOD = "POST";
    private static final String REQUEST_URL_SUFFIX = "/j_security_check";

    @Reference
    private SlingRepository repository;

    @Reference(target = "(service.pid=com.day.crx.security.token.impl.impl.TokenAuthenticationHandler)")
    private AuthenticationHandler wrappedAuthHandler;

    public AuthenticationInfo extractCredentials(HttpServletRequest request, HttpServletResponse response) {
        if (REQUEST_METHOD.equals(request.getMethod()) && request.getRequestURI().endsWith(REQUEST_URL_SUFFIX)) {
            AuthenticationInfo authInfo = wrappedAuthHandler.extractCredentials(request, response);

            SimpleCredentials sc = (SimpleCredentials) authInfo.get("user.jcr.credentials");

            log.debug("User: " + sc.getUserID() + ", Password : " + new String(sc.getPassword()));

            return authInfo;
        }

        return null;
    }

    public boolean requestCredentials(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws IOException {
        return wrappedAuthHandler.requestCredentials(httpServletRequest, httpServletResponse);
    }

    public void dropCredentials(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws IOException {
        wrappedAuthHandler.dropCredentials(httpServletRequest, httpServletResponse);
    }

    @Override
    public void authenticationFailed(HttpServletRequest request, HttpServletResponse response, AuthenticationInfo authInfo) {
        if (wrappedAuthHandler instanceof AuthenticationFeedbackHandler) {
            ((AuthenticationFeedbackHandler) wrappedAuthHandler).authenticationFailed(request, response, authInfo);
        }
    }

    @Override
    public boolean authenticationSucceeded(HttpServletRequest request, HttpServletResponse response, AuthenticationInfo authInfo) {
        if (wrappedAuthHandler instanceof AuthenticationFeedbackHandler) {
            return ((AuthenticationFeedbackHandler) wrappedAuthHandler).authenticationSucceeded(request, response, authInfo);
        }
        return false;
    }
}