Use Rex::Text.md5_raw

Author: jvazquez-r7

lib/rex/proto/kerberos/crypto/rsa_md5.rb

@@ -6,10 +6,7 @@ module Kerberos
       module Crypto
         module RsaMd5
           def checksum_rsa_md5(data)
-            md5 = OpenSSL::Digest::MD5.new
-            md5 << data
-
-            md5.digest
+            Rex::Text.md5_raw(data)
           end
         end
       end