Encryping - Decrypting Stored Procedures

Oct 19, 2004

Hi all...





Im wondering how do you encrypt and decrypt a stored procedure within sql server 2000 ?





i want to be able to encrypt data been inserted / updated using triple des algorithm and then on select / read - decrypt it.





Does anyone know a solution / stored procedure on how to do this? any ideas.





Thanks





Paul..





Im also wondering if there is a away of doing this on the code side without using stored procedures (asp.net c#) i have been able to encrypt and decrpt to a string but unable to do it through the datagrid object (dataset) or a datareader..





Any tips / help would be helpful





Thanks..

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Decrypting And Encrypted Stored Procedure

Sep 6, 2007

Hello,
In SQL 2000,
I have created a Stored Procedure as follows,




Code Snippet

CREATE PROCEDURE MyTest
WITH RECOMPILE, ENCRYPTION
AS
Select * From Customer
Then after this when i run this sp it giving me the perfect results wht i want, BUT when i want to change something in sp then for I am using the below line of code.




Code Snippet

sp_helptext mytest
But its displaying me that this sp is encrypted so you can't see the details and when i am trying to see trhe code of this sp from enterprise manager then also its not displaying me the details and giving me the same error,
So i want to ask that if there is a functionality of enrypting the sp code then is there any functionality for decrypting the Stored Procedure also,
or not,
If yes then wht it is and if NO then wht will be the alternative way for this,
?????

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Jul 23, 2005

I want to know the differences between SQL Server 2000 storedprocedures and oracle stored procedures? Do they have differentsyntax? The concept should be the same that the stored proceduresexecute in the database server with better performance?Please advise good references for Oracle stored procedures also.thanks!!

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Stored Procedures 2005 Vs Stored Procedures 2000

Sep 30, 2006

Hi,



This Might be a really simple thing, however we have just installed SQL server 2005 on a new server, and are having difficulties with the set up of the Store Procedures. Every time we try to modify an existing stored procedure it attempts to save it as an SQL file, unlike in 2000 where it saved it as part of the database itself.



Thank you in advance for any help on this matter



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All My Stored Procedures Are Getting Created As System Procedures!

Nov 6, 2007



Using SQL 2005, SP2. All of a sudden, whenever I create any stored procedures in the master database, they get created as system stored procedures. Doesn't matter what I name them, and what they do.

For example, even this simple little guy:

CREATE PROCEDURE BOB

AS

PRINT 'BOB'

GO

Gets created as a system stored procedure.

Any ideas what would cause that and/or how to fix it?

Thanks,
Jason

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Decrypting Data

Jun 14, 2006

Hi there,

I am having a table in Sql which has 2 columns which has data in encrypted format. It shows data in junk format (ascii format). But in frontend (tht is in software)it shows data in proper format. Can any one help me in decrypting data.

Thanks,

Regards,


mystical

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Decrypting The Password.....

Sep 8, 2007

I have a SQL Server Login and I forgot the password for it.
Is there any way I can decrypt the password. I don't want to
change the password.

Thanks
Venu

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Encrypting And Decrypting Data

Dec 22, 2006

CREATE TABLE TabEncr (
id int identity (1,1),
NonEncrField varchar(30),
EncrField varchar(30)
)

CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'OurSecretPassword'
CREATE CERTIFICATE my_cert with subject = 'Some Certificate'
CREATE SYMMETRIC KEY my_key with algorithm = triple_des encryption by certificate my_cert

OPEN SYMMETRIC KEY my_key DECRYPTION BY CERTIFICATE my_cert
INSERT INTO TabEncr (NonEncrField,EncrField)
VALUES ('Some Plain Value',encryptbykey(key_guid('my_key'),'Some Plain Value'))
CLOSE SYMMETRIC KEY my_key

OPEN SYMMETRIC KEY my_key DECRYPTION BY CERTIFICATE my_cert
SELECT NonEncrField,CONVERT(VARCHAR(30),DecryptByKey(EncrField))
FROM dbo.TabEncr
CLOSE SYMMETRIC KEY my_key

What is the problem with this code. It works fine , inserting the value encrypted but when i try to decrypt ,it returns a null value. What is missing. I also tried with symmetric key encryption with asymmetric key. Result is same, returns NULL value. I am using SQL 2005

Happy Coding...

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Problems With Decrypting Columns

Mar 31, 2006

Hi!

I want to encrypt a whole column in my table and I do this with this SQL code:

OPEN symmetric key Sym_Key DECRYPTION BY certificate My_Cert
GO

UPDATE [My_demo].[dbo].[My-DemoList]
SET [Test_crypt] = encryptByKey(Key_GUID('Sym_Key'),[Test])
GO

CLOSE all symmetric keys

GO

And this seems ok but when I want to decrypt it with the view I have created it seems that I get a "rubbish" character between each "real" character.

So my questions is: What am I doing wrong?

Because if I do an insert like this

OPEN symmetric key Sym_Key DECRYPTION BY certificate My_Cert
GO

INSERT INTO [My-DemoList] (Test_crypt) VALUES(encryptByKey(Key_GUID('Sym_Key'),'1234567'))

GO

CLOSE all symmetric keys

And then use my view to look at the decrypted value that I put in its ok.

Many thanks in advance!

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Decrypting Returns A NULL Value

Apr 26, 2007













I find it weird when decrypting a column from a baked up database and restoring it to another database. Here's the scenario:

Server1 has Database1.
Database1 has Table1 with two columns encyrpted -- Card Number and SS Number
Encryption and decryption in this Database1 is perfectly fine. Records are encrypted and can be decrypted too.
Now, I tried to backup this Database1 and restore it to another server with SQL 2005 instance called Server2. Of course the columns Card and SS Numbers were encrypted. I tried decrypting the columns using the same command to decrypt in Database1, however, it returns a NULL value


Here's exactly what I did to create the encyprtion and decryption keys on the restored database:
-- Create the master key encryption
CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'myMasterPassword'

-- Create a symetric key
CREATE SYMMETRIC KEY myKey WITH ALGORITHM = DES
ENCRYPTION BY Password='myPassword';
Go

-- Create Card Certificate
CREATE CERTIFICATE myCert WITH SUBJECT = 'My Certificate on this Server';
GO

-- Change symmetric key
OPEN SYMMETRIC KEY myKey DECRYPTION BY PASSWORD = 'myPassword';

-- I then verified if the key is opened
SELECT * FROM sys.openkeys




If I create a new database, say Database2 from that Server2, create table, master key, certificate, and symmetric key. Encrpytion and decryption on Database2 will work!




Any suggestions gurus? I tried all searches and help for almost 2 weeks regarding this issue but nobody could resolve this.

Thanks in advance!



faiga16



3 Posts

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Decrypting Column In Transformation

Oct 2, 2007

I have a OLE DB Source that has a varbinary column of encrypted data. The sorce table is on a hosted SQL Server database where I cannot install a asymetric key. The SSIS package is running on a local SQL Server box that does have the asymetric key installed and working. Can you recommend the best way to transform this column is SSIS using a connection to the local SQL Server box that has the installed public key?

select @encryptedstuff = 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

SELECT CONVERT(nvarchar(50),DecryptByAsymKey(AsymKey_ID('rsakey'), REVERSE(@encryptedstuff), N'P4ssw0rd'))



Each row of the OLE DB Source contains a varbinary column with the ecrypted data. I need to to transform that one column and end up with a new record set that contains all of the columns from the OLE DB Source plus a new decrypted column.

Thanks,

Steve

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Decrypting Provided Data

May 2, 2007

I have following problem. I would like to provide to my STP encrypted data and decrypt them inside it. To decrypt the data I'd like to use DecryptByKey. Encryption should be made on the Win32/.NET client.



Unfortunately I cannot find the way to make the data understable between the both worlds. First how to assign the same key on the both side? Do I get the same key from




Code Snippet

create symmetric key MyKey with

algorithm=triple_des,

key_source='abrakadabra'

encryption by password='aaa'



and from




Code Snippet

string Key = "abrakadabra";

byte[] bKey = Encoding.ASCII.GetBytes(Key);

byte[] salt = new byte[8];



RNGCryptoServiceProvider rnd = new RNGCryptoServiceProvider();

rnd.GetBytes(salt);

PasswordDeriveBytes pdb = new PasswordDeriveBytes(bKey, salt);



TripleDESCryptoServiceProvider prov = new TripleDESCryptoServiceProvider();

prov.GenerateIV();

prov.Key = pdb.CryptDeriveKey("TripleDES", "SHA1", 168, prov.IV);

???

I have read somewhere that create symmetric key calls CryptDeriveKey, but I'm not sure.



The next point is the format of the output data. I have noted, that the output from EncryptByKey is 16 bytes longer (after stripping key guid and fixed 0x01000000) than the one from Win32/.NET application. I assume, that it can lie in the inserting of IV as the first block, but should not IV be only 64 bit long in the DES family of algorithms?



Neverthless I have not magaged to perform encrypted communication such way between SQL Server 2005 and client application. Is it possible at all?







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FROM INFORMATION_SCHEMA.TABLES
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May 13, 2008

Greetings:

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How do I cause the 'Save' action to add the new stored procedure to my database's list of stored procedures?

Thanks!

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Sep 19, 2006

Hi all,As all of you are aware you can Encrypt your Triggers/Stored Procedures/Views And Functionsin Sql Server with "WITH ENCRYPTION" clause.recently i came across a Stored procedure on the Net that could reverse and decrypt all Encrypted objects.i personally tested it and it really works.That's fine (of course for some body)Now i want to know is it a Known Bug for Sql Server 2000 and is there a permanent solution for Encrypting mentioned objects.Thanks in advance.Best Regards.

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Jul 20, 2005

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Apr 7, 2006

We recently upgraded to SQL Server 2005. We had several stored procedures in the master database and, rather than completely rewriting a lot of code, we just recreated these stored procedures in the new master database.

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I can't update the sys.Objects or sys.Procedures views in 2005.

What effect will this flag (is_ms_shipped = 1) have on my stored procedures?

Can I move these out of "System Stored Procedures" and into "Stored Procedures"?

Thanks!

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Hello friends......How are you ? I want to ask you all that how can I do the following ?
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How can I call one or more stored procedures into perticular one Stored Proc ? in MS SQL Server 2000/05.

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Mar 26, 2008

Hello
I'm start to work with SSIS.

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Most of the Stored Procedures ends with the following commands:


SET @SQLSTRING = 'SELECT * INTO ' + @OutputTableName + ' FROM #RESULTTABLE'

EXEC @RETVAL = sp_executeSQL @SQLSTRING


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I found a way but I think i'ts only a workaround:

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May 5, 2015

I am executing a stored procedure in one database (Database1) that pulls data from another database (Database2) that is the back end for a third party application. Some of the fields in that other database are now encrypted. I need to decrypt those fields but since the query is running in a database other than where the data lives (which is also where the symmetric key + cert lives), I am getting the following error: "Cannot find the symmetric key" Below is an example of what I am running in the stored procedure:

OPEN SYMMETRIC KEY [XXXXKey] DECRYPTION
BY CERTIFICATE [XXXX_CERT];
select CONVERT(Varchar(50), DECRYPTBYKEY( <ENCRYPTED FIELD> ))
FROM Database2.dbo.TABLE1
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What do I need to add to Database1 so the stored procedure can decrypt the data it pulls from Database2?

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Dec 15, 2005

Hi,

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Mar 17, 2008

In SQL 2005, I've created a test scenario in AdventureWorks where I:

1.) Create a database master key:

IF NOT EXISTS (SELECT * FROM sys.symmetric_keys WHERE symmetric_key_id = 101)
CREATE MASTER KEY ENCRYPTION BY PASSWORD = '<password>'

GO

2.) Create a certificate:

CREATE CERTIFICATE HRCert
WITH SUBJECT = 'Comments'
GO

3.) Create a symmetric key:

CREATE SYMMETRIC KEY CommentKey
WITH ALGORITHM = DES
ENCRYPTION BY CERTIFICATE HRCert
GO

4.) Add a test column to the HumanResources.JobCandidate table:

ALTER TABLE HumanResources.JobCandidate
ADD Comments varbinary(8000)
GO

5.) Open the symmetric key for use:

OPEN SYMMETRIC KEY CommentKey
DECRYPTION BY CERTIFICATE HRCert
GO

6.) Insert and Encrypt values ('Yes') to the newly created column:

UPDATE HumanResources.JobCandidate
SET Comments = EncryptByKey(Key_GUID('CommentKey'), 'Yes')
GO

-------


Great. Now all the textbooks say that, to view the column values in a decrypted state, you should:

SELECT CONVERT(varchar, DecryptByKey(Comments)) AS [Decrypted Comments], *
FROM HumanResources.JobCandidate


------

Great, I get it. But here's the rub. What is the best way to permanently decrypt the column and keep it in a cleartext state?

Running the following works, but keeps the column values in a varbinary (hexadecimal) state which is what we originally created:

UPDATE HumanResources.JobCandidate
SET Comments = DecryptByKey(Comments)
GO

But if I want to transform this varbinary(8000) column into a human-readable varchar column, the only thing I could come up with was a temp table solution:

UPDATE HumanResources.JobCandidate
SET Comments = DecryptByKey(Comments)
GO

DECLARE @temp varchar(1000)
SET @temp = (SELECT TOP 1 CommentsFROM Human Resources.JobCandidate)

CREATE TABLE #decrypt (Comment varchar(1000))
INSERT INTO #decrypt (Comments) VALUES (@temp)
GO

ALTER TABLE HumanResources.JobCandidate
ALTER COLUMN Comments varchar(1000)
GO

UPDATE HumanResources.JobCandidate
SET Comments = (SELECT Comments FROM #decrypt)
GO

DROP TABLE #decrypt
GO

--------

It works, but seems so inelegant to me.

Is there an easier way?

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Jan 18, 2007

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undefined P
 
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