SQL Server Whole DB Encryption

Oct 3, 2007

Hello guys. Here's the scenario. I'm opened to any suggestions. We have thousands of users with laptops running Windows XP SP2. The users login as the Admin of the machine. I know, I know, very bad practice and I totally agree with you. For whatever reason that part has to remained unchanged. In the Laptop we will install an application that will need to work offline so the application will maintain the data using SQL Server 2005 Express. We need to encrypt the whole DB, meaning we need to encrypt the Data File(s) + the Log File(s).

Requirements:
1. We need Stored Procedures (SQL Server 2005 Compact is out of the question).
2. The encryption has to be transparent to the client and Stored Procedures (meaning no column nor table encryption)
3. Whatever method used has to be able to work around the fact the user running is an admin (Windows EFS is out of the question)

Does SQL Server 2005 Standard allow whole DB encryption? How about SQL Express?


We found NetLib Encryptionizer which is exactly what we want, but we do not want to limit our options so we are still looking for other posiblities.

What do you guys recommend?

Thanks...

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SQL Security :: Encryption 2005 - User Defined Function For Encryption And Decryption

Oct 7, 2015

I have created two user defined functions for encryption and decryption using passphrase mechanism. When I call encryption function, each time I am getting the different values for the same input. While I searching a particular value, it takes long time to retrieve due to calling decryption function for each row.

best way to encrypt and decrypt using user defined functions.Below is the query which is taking long time.

SELECT ID FROM table WITH (NOLOCK)
                     WHERE dbo.DecodeFunction(column) = 'value'

When I try to use symetric or asymetric encryption, I am not able to put "OPEN SYMETRIC KEY" code in a function. So, I am using PassPhrase mechanism.

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How do we Encrypt a field values of a table in SQL Server 7.0

Bye
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May 13, 2006

I'm trying to encrypt a column in my table using

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I'm only storing part of the results, and it looks like the # of characters I'm storing is the length of my passphrase.



Thanks,



Phil

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Nov 2, 2007

I am using SQL Server Encryption functions to encrpt the data.I also use that column in my search criteria.
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I encrupt the actual value & then search it in the encrypted column in the database.

Any suggestions or experiences please le me know

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May 6, 2008

 Hi - this is a repost of a question that I originally posted in Security. Ok, I'm very new to this topic.  I'm working on an application that
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decrypted when retrieved.  I have everything set up and it works fine
except for one thing.  I can't seem to be able to pass a parameter into
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doesn't seem all that great to have your password hard-coded into the
stored procedure.  Maybe I'm just screwing something up?  Anyway, I
can't get it to work if it looks like this:OPEN SYMMETRIC KEY Key_NameDECRYPTION BY PASSWORD =  @pwdThis does work:OPEN SYMMETRIC KEY Key_NameDECRYPTION BY PASSWORD =  'password'This
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Jun 11, 2008

I am having a problem with some code I have in a DLL that is running in SQL Server 2005. I am trying to get some RSA encryption and decryption. The encrypt code runs in SAFE mode without a problem. The decrypt code gets and error:

Msg 6522, Level 16, State 1, Line 1
A .NET Framework error occurred during execution of user-defined routine or aggregate "March_CryptoDecrypt":
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at System.Security.CodeAccessPermission.Demand()
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Here is the decrypt code:

static public string Decrypt(string P_text, string P_privateKey)
{
string retStr;
string encryptedBlock = "";
string localTextStr = P_text;
int numberOfBlocks;

RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider();

rsaProvider.FromXmlString(P_privateKey);
Queue<string> encryptedBlocks = new Queue<string>();

while (localTextStr.Length != 0)
{
if (rsaProvider.KeySize == 1024)
{
encryptedBlock = localTextStr.Substring(0, localTextStr.IndexOf("=") + 1);
encryptedBlocks.Enqueue(encryptedBlock);
localTextStr = localTextStr.Remove(0, encryptedBlock.Length);
}
else
{
encryptedBlock = localTextStr.Substring(0, localTextStr.IndexOf("==") + 2);
encryptedBlocks.Enqueue(encryptedBlock);
localTextStr = localTextStr.Remove(0, encryptedBlock.Length);
}
}

encryptedBlocks.TrimExcess();
numberOfBlocks = encryptedBlocks.Count;
retStr = "";
for (int cnt = 1; cnt <= numberOfBlocks; cnt++)
{
encryptedBlock = encryptedBlocks.Dequeue();
retStr +=
ASCIIEncoding.ASCII.GetString(rsaProvider.Decrypt(
Convert.FromBase64String(encryptedBlock), false));
}

return (retStr);
}

Here is the encrypt code that works:

static public string Encrypt(string P_text, string P_publicKey)
{
string retStr;
RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider();

rsaProvider.FromXmlString(P_publicKey);

int numberOfBlocks = (P_text.Length / 32) + 1;
char[] charArray = P_text.ToCharArray();
byte[][] byteBlockArray = new byte[numberOfBlocks][];
int incrementer = 0;
for (int cnt = 1; cnt <= numberOfBlocks; cnt++)
{
if (cnt == numberOfBlocks)
{
byteBlockArray[cnt - 1] =
ASCIIEncoding.ASCII.GetBytes(charArray, incrementer, charArray.Length - incrementer);
}
else
{
byteBlockArray[cnt - 1] =
ASCIIEncoding.ASCII.GetBytes(charArray, incrementer, 32);
incrementer += 32;
}
}

retStr = "";
for (int cnt = 0; cnt < byteBlockArray.Length; cnt++)
{
retStr += System.Convert.ToBase64String(
rsaProvider.Encrypt(byteBlockArray[cnt], false));
}

return (retStr);
}

I do not see why the encrypt can run is safe mode and the decrypt can not. Does anyone have any ideas?

Thank You,

David Demland

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Hi.
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[URL]

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Hello,

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Hello All,



I have a commercial application built for Pocket PC's that connects to SQL Server 2005 via TCP/IP over wireless networks. In installations for our sales people we installed SQL 2005 Express on their notebooks for demonstrations. In one of these installs we are getting the following error message: "An error occurred - SQL Server requires Encryption On". We do not use encrypted connections and I have verified encryption is turned off in the Options tab in SQL 2005 login screens.

Here is the connection string we use in the app.config file on the Pocket PC's:
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Other apps on the notebook are connecting to this same SQL Server without any issues. Thank you in advance for any help here,

Jack

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Hi,



I am at a loss here, unless I misunderstand the whole point about server encryption. My 2005 SQL server has a certificate from a trust CA, I have turned on the 'force encryption' flags on the server. My understanding is any client will be "force" to connect with encryption?? I found out that unless I turn on encryption on my clients, the server will allow connections without the requiring encryption. Am I missing something here? Thanks for any help you can provide.

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May 25, 2007



Hello All,



I have a commercial application built for Pocket PC's that connects to SQL Server 2005 via TCP/IP over wireless networks. In installations for our sales people we installed SQL 2005 Express on their notebooks for demonstrations. In one of these installs we are getting the following error message: "An error occurred - SQL Server requires Encryption On". We do not use encrypted connections and I have verified encryption is turned off in the Options tab in SQL 2005 login screens.

Here is the connection string we use in the app.config file on the Pocket PC's:
<add key="connStr" value="Data Source=192.168.0.19,1433;Initial Catalog=SQL0018;User ID = User01;Password=PW01"/>

Other apps on the notebook are connecting to this same SQL Server without any issues. Thank you in advance for any help here,

Jack

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May 25, 2007



Hello All,



I have a commercial application built for Pocket PC's that connects to SQL Server 2005 via TCP/IP over wireless networks. In installations for our sales people we installed SQL 2005 Express on their notebooks for demonstrations. In one of these installs we are getting the following error message: "An error occurred - SQL Server requires Encryption On". We do not use encrypted connections and I have verified encryption is turned off in the Options tab in SQL 2005 login screens.

Here is the connection string we use in the app.config file on the Pocket PC's:
<add key="connStr" value="Data Source=192.168.0.19,1433;Initial Catalog=SQL0018;User ID = User01;Password=PW01"/>

Other apps on the notebook are connecting to this same SQL Server without any issues. Thank you in advance for any help here,

Jack

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Hi everyone! I have a problem and I was hoping someone could help me with it.


Here's my scenario:
I have to access to an intermediate SQL Server 2005 database, which I cannot change or alter. In this database is information that a I need to retrieve and put in our website database. One item of information is a persons SSN which is stored in a varbinary field and encrypted using a certificate.

In my Data Flow task which processes this information I am using an Ole Db Source to retrieve the information with the SQL Script:


SELECT
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FROM
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BTW, This script runs fine from within SQL Server Management Studio. It decrypts the SSN to the appropriate value. However, when I run it in SSIS, I receive a truncation error which is no small surprise b/c the SSN value is in a large binary format. I.e:


0x55 0x56 0x69 0x99 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 ...


It goes on further, but for the sake of brevity and my own sanity I thought I should truncate it.


It seems like SSIS's use of the certificate is failing (although I don't get an error for that) and is simply pulling the encrypted SSN from the intermediate table.


So my first question would be, is this actually what's going awry? And secondly, is there a way to fix this without touching the source database??


Thanks! I greatly appreciate it! And Happy Holidays!

Derek

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Hi,

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