Force Encryption On Server Not Working???
May 8, 2007
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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Aug 8, 2007
Hi,
i've enabled the certification authentication login i use SQL 2K5 ENT
my problem is like that: in the client network utility i check the Force protocol encryption and connect
to the server the client can't connect because he doesn't have the certificate install on his machine which it's OK.
the problem is when i remove the Force protocol encryption on the client he connect successfully without the
certificate install on his machine or any thing.
i double check that on the server i've YES on the Force Encryption in the protocols For MSSQLSERVER.
why is that???
THX
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Aug 8, 2007
Hi,
i've enabled the certification authentication login i use SQL 2K5 ENT
my problem is like that: in the client network utility i check the Force protocol encryption and connect
to the server the client can't connect because he doesn't have the certificate install on his machine which it's OK.
the problem is when i remove the Force protocol encryption on the client he connect successfully without the
certificate install on his machine or any thing.
i double check that on the server i've YES on the Force Encryption in the protocols For MSSQLSERVER.
why is that???
THX
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Jun 8, 2006
I want to configure SQL 2k5 Express so that all connections are
encrypted. I've found the documentation that gives the How-To steps,
but I don't see the SSL option in the Network Configuration.
Is this possible with the Express edition?
Do I need to do something special with the installation?
Thanks,
OldSam
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Aug 26, 2004
I am connection to a SQL server that has force protocol encryption checked. From my ASP.net application, specifically in my connection string, what parameter do I need to use to take advantage of this encryption?
Thanks!
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Sep 15, 2015
I have a SQL Server 2012 Standard and needed to fulfill a requirement to set Force Encryption on the Server with a DoD Certificate.
I will be altering my client connections to use Encrypt=True; TrustServerCertificate=True (The client is a .Net Web Application).
The OS is where SQL Server 2012 Standard resides is Windows 2008 R2 DataCenter Service Pack 1 64-bit.
What I am needing to know is where do I get the DoD Certificate from? and Do I just install it on the server where SQL Server resides?
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Oct 30, 2007
I would like to force only certain users on certain databases to use encrypted connections for accessing our 2005 SQL Server. I've found a clunky way to do it, via registering a login event notification and using the kill statement. However, that's ugly, and I don't think there is any guarantee that the event will always fire before an evil client could get off a few evil commands. Is this supported, or is the only supported feature the forceencryption option, which is server-wide?
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Apr 1, 2015
I have a customer who is looking to encrypt their applications connection to the back-end SQL server. I've gotten a valid certificate for the server from a trusted CA, and it's installed on the server (shows up in Personal certificates in the Certificate MMC when selecting the computer) and I can choose it in the drop down on the certificates tab of the SQL Network protocols properties in Configuration Manager.
Now, my question: If I select the certificate but do NOT enable the "Force Encryption" option, the client will be able to request encryption on their end, and the connection will then be encrypted. If the client (other applications) do NOT request encryption, they will still be able to connect, but their connection will be un-encrypted. URL....
Lastly, I could've swore I had found some information indicating that some methods of establishing a connection to SQL can fail when Force Encryption is enabled, as the method doesn't support SSL encryption.
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Feb 5, 2007
I am accessing a SQL2005 Express SP1 Server via TCP/IP (all machines fully up to date with windows update). For ease of configuration the Server IP is mapped to an Alias in Native Client Configuration Manager. On the Client Force Protocol Encryption is set to Yes and Trust Server Certificate is set to No. The clients are accessing the DB via SQL 2005 Management studio express and Ms Access 2003 (an access adp front end to the sql database).
As a test i turned off force encryption on the server. A Network trace shows no encryption! Turning on force encryption on the server corrects this.
As a further test I configured the server with a certificate the client doesn't trust. No error is generated by the un-trusted certificate! The only way to generate the certificate error is to enable encryption in the connection properties of each application. Why isn't the Native Client Configuration Manager utility enforcing this???
This brings me on to a second (off-topic problem). In my access adp file, if I enable €œuse encryption for data€? advanced option under the database connection dialog all works as expected (encryption + certificate verification). However, I am programmatically updating the connection in VBA
Application.CurrentProject.OpenConnection "Provider=SQLOLEDB.1;Data Source=AliasName;Use Encryption for Data=True;..."
If I do this no encryption is enabled!!! Access seems to just ignore the encryption statement.
Has anybody got any ideas as to why either of these issues are occurring or if there are any workarounds?
Thanks
Stuart
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Jun 21, 2007
Please be gentle...I am very new to working with SQL.
I have the need to encrypt my columns in SQL 2005. I have created a symmetric key 'SecureKey' as well as a secure certificate 'SecureCert'
I have ran the script to create the key and the certificate successfully. When I run "select * sys.symmetic_keys;" the key shows up...when I run "select * sys.certificates;" the cert shows up.
Here is my issue, in the security folder under my database, these two things do not show up in the appropriate folders. Also when I run my encryption scripts, I am getting an error of
"msg 15151, Level 16, State 1, Line 3
cannot find the symmetric key 'SecureKey', because it does not exist or you do not have permission"
Am I missing something?
Thanks
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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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Jul 6, 2007
If I do the query below, SQL Server does a table scan (thousands of rows) for fn_TestCol(), then evaluates the CONTAINS clause:
SELECT col1, col2
FROM myTable
WHERE CONTAINS((col1, col2), 'foo and bar')
AND fn_TestCol(col1) = 0
How can I force it to evaluate CONTAINS clause, which returns only a few rows, first? The best I've come up with is this:
SELECT sub.col1, sub.col2
FROM (
SELECT col1, col2
FROM myTable
WHERE CONTAINS((col1, col2), 'foo and bar')
) sub
WHERE fn_TestCol(sub.col1) = 0
It's much faster, but still not as fast as if I could just use the first query, but force SQL Server to evaluate CONTAINS first.
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Apr 27, 2005
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Nov 11, 2004
Hello - the very nature of this question seems to make no sense I know - but we received a huge volume of data (29 tables) in flat file format. I first imported them into MS Access because of its portability and it seemed to be more forgiving on imports. Now I have a complete MS Access DB with all tables, so I figured importing to SQL server should be a snap. However, on the import, I had 14 tables import successfully, and 15 failed!
Here is an example of one of the error messages I received:
Insert Error, Column 3 - status 6; Data Overflow...this was on a date/time field in access, and here is the data contained in the referenced row/column: "8/19/4999"
the year "4999" is obviously the problem (at least i think), and I have no idea why this successfully imported to MS Access, but not to SQL Server....
what i'd like to be able to do (not the best practice, i know) for now is ignore these types of errors - and just force SQL server to take the data straight from MS Access and replicate it. We received this data from a 3rd party, and there's no telling how many data entry errors like this could be in each table - many of the tables have over 500,000 rows, and i don't want to have to go through fixing each of these errors by hand...anyone have any ideas?
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Oct 30, 2015
Select A.* from A inner join B on ( A.ID= B.ID )
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Jan 11, 2008
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Nov 11, 2015
Is it possible to force row level locking in Sql server 2015 before inserting the data and release the same afterwords..find the code for which we would like to impliment the same
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Jul 12, 2001
How do we Encrypt a field values of a table in SQL Server 7.0
Bye
Amar
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Mar 5, 2005
hey ppl..
i am creating a client that can access straight into the sql db using vb.net.
is there a way encrypt the data from the client and the sql server will decrypt the data and visa versa?
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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.
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Nov 2, 2007
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Any suggestions or experiences please le me know
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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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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
requires that some information in the db be encrypted and then
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
the sp that is used to decrypt the key. It only seems to take the
string when typed in. I really think I'm missing something here. It
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
has to be some goof on my part right? If the db machine is compromised
you're giving the keys to decrypt the data away as well - they just
haver to open your stored proc. You should keep them separate imo and
I hope someone can set me straight. Also, encrypting the stored
procedure is an option, but it's very easy to decrypt from what I've
read. Can someone help point me in the right direction? Thanks! And thanks to the mod that suggested moving this post. Any help will be appreciated.
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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":
System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.KeyContainerPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
System.Security.SecurityException:
at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet)
at System.Security.CodeAccessPermission.Demand()
at System.Security.Cryptography.RSACryptoServiceProvider.ImportParameters(RSAParameters parameters)
at System.Security.Cryptography.RSA.FromXmlString(String xmlString)
at Crypto.DoCrypto.Decrypt(String P_text, String P_privateKey)
at SQLServerCrypto.Decrypt(SqlString P_text, SqlString P_privateKey)
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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Jun 20, 2006
Hi All,Does any body know how to use encryption in sql server 2005.Is itpossible to encrypt a particular column in a table.thanks
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Jan 10, 2007
I was wondering whether anyone ever dealt with encryption that are visacompliant with credit card numbers:On 3.4 of this document(http://usa.visa.com/download/busine...ty_Standard.pdf)It states the encryption:One-way hashes (hashed indexes), such as SHA-1- Truncation- Index tokens and PADs, with the PADs being securely stored- Strong cryptography, such as Triple-DES 128-bit or AES 256-bit withassociated keymanagement processes and procedures1. One way hashes cannot be decrypted so this won't work2. Triple DES works however we will need to encrypt SSN. Triple DESdoesn't encrypt 2 values the same way, so we cannot use it as anindex key that we wanted to. The decrypted value comes out the samehowever the encrypted values are always different. We can't do tablescans for a SSN look up.3. Truncation - I have no idea4. Index token or PAD seems like one way encryption and never can bedecrypted (not sure what this is for if it can't be decrypted)So how do I get this to work?? It doesn't say RSA is compliant either.If you think RSA is okay, where does it EXPLICITLY say that on thisdocument???:D
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Aug 28, 2007
If I understand all the posts/documentation correctly am I correct in saying that sql server will not send a symmetric key outside of database.
For Eg can I use ADO.Net to get the key from database into a C# application to do encryption/decryption in the C# application outside of database. I want the C# application to be able to encrypt/decrypt data using .Net cryptography api's but use sql server as key store in addition to encryption/decryption.
thanks for the help
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Feb 19, 2008
Hi.
I have a SQL Server 2000 database that contains information I would like to encrypt. The information is a field inside a table, and I would like to encrypt this information using a key, and decrypt it in my asp.net application using that key and use the decrypted data.
Please tell me how this can be done, or direct me to an article or a link on the subject.
Thanks in advance.
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Jun 23, 2004
Are there any UDf's or Xtended stored procs available in sql server 2k that can encrypt a column that has the CC #'s or do I need to purchase a 3rd party tool ?
thanks,
Dinakar
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