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Decrypting SQL Server database objects

MSSQLTips author Greg Robidoux By:   |   Read Comments (7)   |   Related Tips: 1 | 2 | More > Encryption

Problem
SQL Server offers a way to encrypt your Stored Procedures to make sure that prying eyes cannot see what is going on behind the scenes.  The problem with this method is that it is not a very secure way of encrypting the contents of your stored procedures.  In addition, since SQL Server basically stores your source code vs. a compiled version most people rely on the code that is in the database server instead of moving the code to a source control application.  Because of the need to access this code this tip outlines various methods of decrypting your encrypted database objects.

Solution
There are basically two ways that you can go about doing this; 1) you can write your own process or 2) you can download and/or purchase a tool that was developed to do just this.  Various tools exist that allow you to decrypt your database objects.

So how does encryption work?

Basically it is a simple option that you use when creating your objects. Here is a basic example using the "WITH ENCRYPTION" option.

CREATE PROCEDURE uspGetAuthors
WITH ENCRYPTION
AS
SELECT *
FROM authors
GO

After I create this stored procedure, when I try to view the contents of the stored procedure using the following command,

sp_helptext uspGetAuthors

I get this error: "The object comments have been encrypted."

Also, when trying to look at this stored procedure in Enterprise Manager I get the following error message.

To decrypt the stored procedure I used this script. This is very simple to install and use and allows you to decrypt stored procedures, view and triggers and best of all it is free.  To use this script I first created it and then ran the following command.

exec DECRYPT2K 'uspGetAuthors', 'S'

When I issue the sp_helptext statement again this is the results I get, so we can see that it decrypted the stored procedure and it is now available for editing both with Query Analyzer or Enterprise Manager.

CREATE PROCEDURE uspGetAuthors

AS
SELECT *
FROM authors

So as you can see there is not a lot to decrypting your database objects.  Also, encrypted objects are not really that secure, so this should not be your only method for securing code that you do not want others to see.

Along with the script mentioned above, here is a list of other tools that are available:

Next Steps

  • Add this tool to your SQL toolkit
  • Take a look at some these tools that are available
  • Make sure that if you are trying to keep prying eyes away from your code using the encryption option that there are ways to get to it so look for other methods


Last Update: 8/23/2006





About the author
MSSQLTips author Greg Robidoux
Greg Robidoux is the President of Edgewood Solutions and a co-founder of MSSQLTips.com.

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Monday, May 19, 2014 - 4:47:36 AM - muthupandi Read The Tip

Function does not work.....


Thursday, May 02, 2013 - 8:57:41 PM - Alan Read The Tip

I have tried this decryption procedure and the encryted procedure I tried to decrypt with this code has vanished.

 

why is that, where has it gone etc


Tuesday, January 11, 2011 - 10:32:49 AM - Greg Robidoux Read The Tip

What version of SQL Server are you using?


Tuesday, January 11, 2011 - 4:56:20 AM - Prasad Read The Tip

the procedure doesnt work


Tuesday, August 31, 2010 - 2:11:22 PM - grobido Read The Tip
It looks like the above link no longer exists.  You can try to use this link instead:

http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=505&lngWId=5


Monday, April 20, 2009 - 1:40:40 PM - grobido Read The Tip

Take a look at this other code in the link below.  There was a comment made on the originating site.

http://www.garyweb.co.uk/decrypt_sp.sql

Not sure if this works with SQL 2005 or not.  Have not tested it.

 


Monday, April 21, 2008 - 9:57:30 PM - vvkp Read The Tip

Hi,

When I use your script for decryption, the stored procs are disappearing. I am using your took for SQL2005. Any idea?




 
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