diff --git a/src/cli/one_helper/oneuser_helper.rb b/src/cli/one_helper/oneuser_helper.rb
index d3a78b0955..930f719e2e 100644
--- a/src/cli/one_helper/oneuser_helper.rb
+++ b/src/cli/one_helper/oneuser_helper.rb
@@ -82,6 +82,21 @@ class OneUserHelper < OpenNebulaHelper::OneHelper
         return 0, auth.password
     end
 
+    # Returns the driver to be used for 'oneuser create'
+    # @param options [Hash] oneuser command options
+    # @return [String] the authentication driver to use
+    def driver(options)
+        if options[:driver]
+            return options[:driver]
+        elsif options[:ssh]
+            return OpenNebula::User::SSH_AUTH
+        elsif options[:x509]
+            return OpenNebula::User::X509_AUTH
+        else
+            return OpenNebula::User::CORE_AUTH
+        end
+    end
+
     def self.login(username, options)
         if options[:ssh]
             require 'ssh_auth'
diff --git a/src/cli/oneuser b/src/cli/oneuser
index 9bb2ba4a70..b1c6970c1b 100755
--- a/src/cli/oneuser
+++ b/src/cli/oneuser
@@ -159,8 +159,9 @@ cmd=CommandParser::CmdParser.new(ARGV) do
             end
         end
 
+        driver = helper.driver(options)
+
         helper.create_resource(options) do |user|
-            driver = options[:driver] || OpenNebula::User::CORE_AUTH
             user.allocate(args[0], pass, driver)
         end
     end
diff --git a/src/oca/ruby/OpenNebula/User.rb b/src/oca/ruby/OpenNebula/User.rb
index 8e71ff5c6b..ed104a17f0 100644
--- a/src/oca/ruby/OpenNebula/User.rb
+++ b/src/oca/ruby/OpenNebula/User.rb
@@ -35,9 +35,15 @@ module OpenNebula
 
         SELF      = -1
         
-        #Selects core authentication driver        
+        # Driver name for default core authentication
         CORE_AUTH = "core"
 
+        # Driver name for ssh authentication
+        SSH_AUTH  = "ssh"
+
+        # Driver name for x509 authentication
+        X509_AUTH = "x509"
+
         # Creates a User description with just its identifier
         # this method should be used to create plain User objects.
         # +id+ the id of the user