java - User Authentication with REST in a web app secured with Spring Security -


my spring boot-based web app authenticates against remote rest api. so, have extended abstractuserdetailsauthenticationprovider so:

public class restauthenticationprovider extends abstractuserdetailsauthenticationprovider {     @override     protected void additionalauthenticationchecks(userdetails userdetails,             usernamepasswordauthenticationtoken authentication) throws authenticationexception {         // todo auto-generated method stub     }      @override     protected userdetails retrieveuser(string username, usernamepasswordauthenticationtoken authentication)             throws authenticationexception {         string password = (string) authentication.getcredentials();         credentials creds = new credentials();         creds.setusername(username);         creds.setpassword(password);          resttemplate template = new resttemplate();         try {             responseentity<authentication> auth = template.postforentity("http://localhost:8080/api/authenticate",                     creds, authentication.class);             if (auth.getstatuscode() == httpstatus.ok) {                  string token = auth.getheaders().get("authorization").get(0); // great! what?                  return new user(authentication.getname(), password,                         collections.singletonlist(new simplegrantedauthority("role_user")));             }              throw new badcredentialsexception("failed authenticate, server returned " + auth.getstatuscodevalue());          } catch (httpclienterrorexception e) { // check type of error             throw new badcredentialsexception(e.getstatustext());         }     } }

this works great. problem subsequent access api require api key being provided in resttemplate headers. line :

string token = auth.getheaders().get("authorization").get(0); // great! what?

what i'm after way persist token @ session level future access. down line, i'm trying along lines of:

    securitycontext context = securitycontextholder.getcontext();     authentication userdetails = context.getauthentication() ;

where somehow userdetails contain api key.

any suggestions?

thanks!

this you designing & implementing own security solution. framework provides way implement how resolve userdetails based on credentials.

i see question subsequent invocations of this. reason "old school" web apps have sessions, "new school" thinks it's "not cool" anymore "does not scale" ( or whatever other reasons ) , assume you're 1 of those.

if don't want use sessions - need user database ( or cache, or session store, or ) based on identified.

your current implementation provides feature using username , password, assume don't want keep in memory & send every request.

so want generate token, store in database ( or cache, or token store, or session store ) , implement authenticationprovider next time read userdetails based on token, not user credentials.

you use jwt token able serialize whole userdetails object token & send on wire, wouldn't recommend either there no way invalidate it, unless you're storing token id in database / session store.

more read here: invalidating json web tokens


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