diff --git a/providers/ark.rb b/providers/ark.rb
index db0b3b14..996a82ab 100644
--- a/providers/ark.rb
+++ b/providers/ark.rb
@@ -47,8 +47,13 @@ def parse_app_dir_name url
 def oracle_downloaded?(download_path, new_resource)
   if ::File.exists? download_path
     require 'digest'
-    downloaded_sha =  Digest::SHA256.file(download_path).hexdigest
-    downloaded_sha == new_resource.checksum
+    if new_resource.checksum =~ /^[0-9a-f]{32}$/
+      downloaded_sha =  Digest::MD5.file(download_path).hexdigest
+      downloaded_sha == new_resource.md5 
+    else
+      downloaded_sha =  Digest::SHA256.file(download_path).hexdigest
+      downloaded_sha == new_resource.checksum
+    end
   else
     return false
   end
diff --git a/resources/ark.rb b/resources/ark.rb
index 0318aa2d..f022f427 100644
--- a/resources/ark.rb
+++ b/resources/ark.rb
@@ -21,7 +21,7 @@
 
 attribute :url, :regex => /^(file|https?):\/\/.*(tar.gz|tgz|bin|zip)$/, :default => nil
 attribute :mirrorlist, :kind_of => Array, :default => nil
-attribute :checksum, :regex => /^[a-zA-Z0-9]{40,64}$/, :default => nil
+attribute :checksum, :regex => /^[0-9a-f]{32}$|^[a-zA-Z0-9]{40,64}$/, :default => nil
 attribute :app_home, :kind_of => String, :default => nil
 attribute :app_home_mode, :kind_of => Integer, :default => 0755
 attribute :bin_cmds, :kind_of => Array, :default => nil