So, further investigation notes: I think I should call the Provider like it's done here: https://github.com/keycloak/keycloak/blob/master/examples/providers/user-... in the create method, which allows me to call the corresponding isValid(...) method of the required providers and only set the boolean return value of validatePassword to false if the credentials doesn't match in any of the providers. But to call this for ldap-providers set by admin interface, I need two things: a) a Componentmodel. Concrete Question: Anyone knows how to get the right ComponentModel instance to use from my AuthenticationFlowContext of AbstractUsernameFormAuthenticator.java? I've seen that it's possible to get a List of ComponentModels by calling context.getRealm().getComponents(), or by getComponent(String s), but I don't know which String would be the valid parameter or which Model I should take out of the List. b) the lookup-path. Concrete question 2: Anyone knows how to get it form the internally used Factories or s.th.? My Providers are 2 ldap directories which I want to iterate over for the username. Thanks in advance! Best regards, Dominik Am 24.01.18 um 09:27 schrieb Dominik Guhr: > Hi everyone, > > I'm implementing an authentication SPI execution on top of the > "normal" username/password form of kc 3.4.3.Final. -> > https://github.com/keycloak/keycloak/blob/master/services/src/main/java/o... > > > Sadly, usernames are not unique atm, so I need to change the > execution, so that it doesn't stop with "invalid credentials" for a > user who was found in one Provider. > > Instead of giving the "invalid credentials"-error, I want my execution > to first check all other providers for the same username, and then > check the credentials against all matches. And just in case of no > credentials matching, it should fail, or login a new session for this > user when one is found in any of my (3) Providers, which are added by > user federation feature (2 ADs, one by a custom user storage SPI). > > So I drilled it down to the method validatePassword(...) in > AbstractUsernameFormAuthenticator.java -> > https://github.com/keycloak/keycloak/blob/master/services/src/main/java/o... > line 191, which I want to change accordingly. Sadly, I can't find a > method to get all Providers of the realm and check accordingly. The > code I want to change is: > > if (password != null && !password.isEmpty() && > context.getSession().userCredentialManager().isValid(context.getRealm(), > user, credentials)) { >              return true; >          } else {...} > > instead of just checking isValid() for one provider, which is what > this does atm, I want to check all Providers. Like this pseudocode: > > if (password != null && !password.isEmpty() && > context.getSession().userCredentialManager().isValid(context.getRealm(), > user, credentials)) { >              boolean isValid = false; >          List<Provider> realmProviders = context.getAllProviders(); >          for(Provider provider : realmProviders){ >              isValid = provider.isValid(...); >          } >              return isValid; >          } else {...} > Could anyone perhaps give me a hint in how to achieve this? I haven't > found a method yet to get all Providers and check for isValid in any > of the given ones. > > Best regards, > Dominik > > p.s. I created a stackoverflow question here: > https://stackoverflow.com/questions/48399622/keycloak-check-password-in-m... > feel free to comment/answer there :)