1 files changed, 43 insertions, 0 deletions
diff --git a/lib/trocla/util.rb b/lib/trocla/util.rb
new file mode 100644
index 0000000..8e94d0d
--- /dev/null
+++ b/lib/trocla/util.rb
@@ -0,0 +1,43 @@
+require 'securerandom'
+class Trocla
+  class Util
+    class << self
+      def random_str(length=12, charset='default')
+        _charsets = charsets[charset] || charsets['default']
+        _charsets_size = _charsets_size
+        (1..length).collect{|a| _charsets[SecureRandom.random_number(_charsets.size)] }.join.to_s
+      end
+
+      def salt(length=8)
+        alphanumeric_size = alphanumeric.size
+        (1..length).collect{|a| alphanumeric[SecureRandom.random_number(alphanumeric_size)] }.join.to_s
+      end
+
+      private
+
+      def charsets
+        @charsets ||= {
+          'default'       => chars,
+          'alphanumeric'  => alphanumeric,
+          'shellsafe'     => shellsafe,
+        }
+      end
+
+      def chars
+        @chars ||= shellsafe + special_chars
+      end
+      def shellsafe
+        @chars ||= alphanumeric + shellsafe_chars
+      end
+      def alphanumeric
+        @alphanumeric ||= ('a'..'z').to_a + ('A'..'Z').to_a + ('0'..'9').to_a
+      end
+      def special_chars
+        @special_chars ||= "*()&![]{}-".split(//)
+      end
+      def shellsafe_chars
+        @shellsafe_chars ||= "+%/@=?_.,:".split(//)
+      end
+    end
+  end
+end