Github user koushik-das commented on a diff in the pull request:

    https://github.com/apache/cloudstack/pull/755#discussion_r38515428
  
    --- Diff: 
plugins/user-authenticators/ldap/src/org/apache/cloudstack/ldap/LdapAuthenticator.java
 ---
    @@ -52,21 +58,71 @@ public LdapAuthenticator(final LdapManager ldapManager, 
final UserAccountDao use
                 return new Pair<Boolean, ActionOnFailedAuthentication>(false, 
null);
             }
     
    -        final UserAccount user = _userAccountDao.getUserAccount(username, 
domainId);
    +        boolean result = false;
    +        ActionOnFailedAuthentication action = null;
     
    -        if (user == null) {
    -            s_logger.debug("Unable to find user with " + username + " in 
domain " + domainId);
    -            return new Pair<Boolean, ActionOnFailedAuthentication>(false, 
null);
    -        } else if (_ldapManager.isLdapEnabled()) {
    -            boolean result = _ldapManager.canAuthenticate(username, 
password);
    -            ActionOnFailedAuthentication action = null;
    -            if (result == false) {
    +        if (_ldapManager.isLdapEnabled()) {
    +            final UserAccount user = 
_userAccountDao.getUserAccount(username, domainId);
    +            LdapTrustMapVO ldapTrustMapVO = 
_ldapManager.getDomainLinkedToLdap(domainId);
    +            if(ldapTrustMapVO != null) {
    +                try {
    +                    LdapUser ldapUser = _ldapManager.getUser(username, 
ldapTrustMapVO.getType().toString(), ldapTrustMapVO.getName());
    +                    if(!ldapUser.isDisabled()) {
    +                        result = 
_ldapManager.canAuthenticate(ldapUser.getPrincipal(), password);
    +                        if(result) {
    +                            if(user == null) {
    +                                // import user to cloudstack
    +                                createCloudStackUserAccount(ldapUser, 
domainId, ldapTrustMapVO.getAccountType());
    --- End diff --
    
    By authn I mean the call to LdapManager.canAuthenticate(). This will be 
successful in both cases but CS will report authn failure in once case due to 
account creation failure which is not intuitive. Account creation failure will 
be passed as authn failure.
    But this will be a corner case scenario.


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