[keycloak-dev] Error when the value of "UUID LDAP attribute" is the same of the "Username LDAP attribute"

[Marcelo Arthur Sampaio]

Hi,

I get this error when the value of "UUID LDAP attribute" is the same of the  "Username LDAP attribute": Ex. "uid"

Caused by: java.lang.NullPointerException
    at org.keycloak.models.cache.DefaultCacheUserProvider.getUserByUsername(DefaultCacheUserProvider.java:149) [keycloak-invalidation-cache-model-1.3.1.Final.jar:1.3.1.Final]
    at org.keycloak.federation.ldap.LDAPFederationProvider.importLDAPUsers(LDAPFederationProvider.java:391)

The method org.keycloak.federation.ldap.LDAPUtils.getUsername(LDAPObject, LDAPConfig)
dont return the username, because the attribute is not in the map.

This occours because the uid is not added into the map of attributes.

I looked at  org.keycloak.federation.ldap.idm.store.ldap.LDAPIdentityStore.populateAttributedType(SearchResult, Collection<String>) line 402:

                if (ldapAttributeName.equalsIgnoreCase(getConfig().getUuidLDAPAttributeName())) {
                    Object uuidValue = ldapAttribute.get();
                    ldapObject.setUuid(this.operationManager.decodeEntryUUID(uuidValue));
                } else {
                    Set<String> attrValues = new TreeSet<>();
                    NamingEnumeration<?> enumm = ldapAttribute.getAll();
                    while (enumm.hasMoreElements()) {
                        String attrVal = enumm.next().toString();
                        attrValues.add(attrVal);
                    } ...



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