SQL Mobile 3 Encryption
Aug 23, 2007
Hi Folks,
I am doing some research into SQL Mobile to determine if it suitable for particular project and I am trying to identify the encryption available on the device. I have read that there is 128bit encryption available in data sheets for the product, but is this of AES standard or equivalent?
Amoungst the things I have also read is that window mobile 5 supports this with the .Net CF etc, but I am more concerned with actual .sdf file encrption at the moment.I have read the SQL Bol as well where they demonstrate how to secure the database but I dont see where the encryption type is specified.
Also, if this is not a feature of SQL Mobile, is there practical way to meet this requirement using SQL Mobile?
So, in summary, is the encrpytion used in SQL Mobile of AES standard or equivalent?
Thanks in advance,
Morrislgn
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Sep 28, 2006
I'm seeking suggestions on how to go about encrypting a database connection string in the compact framework. It's something that I thought would be relatively straight forward as I've accomplished it without much difficulty in the full framework, but I'm stuggling to find a solution.
I've been trying to implement a solution using public/private key asymmetric encryption using the RSA provider. I've essentially been trying to encrypt the connection string once on my development machine so that I can include both the encrypted connection string value and public key in either code or an external file. I'd then keep the private key out of harms reach. The problem I've encountered in doing this is that that RSA provider seemingly only allows new "in session" keys to be generated and I can't figure out a way of importing a public key from a file or other similar means.
I found the following code which is meant to allow a key to be retrieved from a signed assembly or an SNK file, which I've converted to VB but haven't been able to get working:
http://www.topxml.com/-NET-XML-System-XML/re-2963_Get-RSA-Public-key-from-Assembly-or-SNK-File.aspx
After the code seems to successfully prepare the CspParameters from an SNK files, I get an unspecified error when executing ImportParameters on the RSA provider.
I'd imagine this to be a common requirement, but haven't been able to find much information specific to the compact framework on the web. Any guidance would be much appreciated.
Thanks,
Steve
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Oct 12, 2007
I have code that creates a SQL Mobile database on a server. It has worked in many environments, but I have one customer experiencing an issue. It will not create the database on their server. I would appreciate any thoughts.
The exact error message I get is "the operating system does not support encryption"
I am getting it on the line: SQLCeEngine.CreateDatabase()
Here is the code:
SQLCeEngine = New SqlServerCe.SqlCeEngine(SQLConnectionString)
ReturnValue += ": Declare new"
SQLCeEngine.CreateDatabase()
ReturnValue += ":Create"
SQLCeEngine.Dispose()
ReturnValue += ": Dispose"
Here is the error message I get from our application- the part after Err: is the actual error message from the system:
Data Source = D:EVADATAWebServiceDownloads est;Password=test;Persist Security Info=False;: Declare new:Error!:Err:The operating system does not support encryption.
When I go into SQL Express and create a SQL Mobile database using it, it can be created. So, I have to believe it can be done on the server, but I don't know why the code can not do it.
(e.g. FileConnect Object ExplorerServer Type: SQL Server compact Edition and create a database). The database is successfully created if I do it manually this way. It even creates fine if I select the 'Encrypt' button.
The machine is a Windows 2000 Server sp4 version 5.00.2195
SQL 2000 is installed
SQL 2005 Express is installed
I ran the SQLServerCE31-EN.msi file and it is installed. (I have also re-run and repaired it)
I have also copied over the newest version of our code from scratch.
SQL Server mgmt Studio: 9.00.3042.00
MDAC 2000.085.1128.00
MSXML 2.3 3.1 4.0 5.0 6.0
IE 6.0.2800.1106
.NET Framework 2.0.50727.42
Operating System 5.0.2195
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Jul 26, 2007
Hi,
I have a central database server that is runnning on SQL 2005 standard edition and Windows server 2003 standard as OS.
I realise that I can use SQL statements to encrypt and decrypt the data inside the standard SQL.
However, how do I read and write the data via an web application coded in C#.net and is also running on the same machine?
Another issue is, I need to replicate some of the data in this SQL standard over to a SQL mobile running on a mobile device running on Windows CE 5.0.
The mobile device also needs to read and write data to the encrypted data via a C#.net application.
Question is, with all these requirements to be met, can I use AES? I know that AES is not available on Windows XP and Windows Server 2000 and I cant find AES in the .net compact framework.
how do i go about ensuring security? how do I ensure that the symmetric key is the same both on the SQL standard and SQL mobile?
thank you.
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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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Aug 8, 2006
Dear ppl,
I am writing an application for a device (MDA Pro T-Mobile) having Windows Mobile 5.0 using
-MS .NET Compact Framework 2.0 SP-1
-SQL Mobile 2005.
-VS 2005 .NET
The application uses Merge Replication. The error occurs in the Synchronise() Method of the SqlCeReplication object.
"SQL Server Mobile encountered problems when opening the database."
repl.AddSubscription(AddOption.CreateDatabase);
repl.Synchronize();
I don't understand why I am having this error. It does create the database on AddSubscription() method but it is failing opening the database on Synchronise(). I have also tried uninstalling and then reinstalling all the SQL Mobile components in the following order.
-sqlce30.wce5.armv4i.cab
-sqlce30.repl.wce5.armv4i.cab
-sqlce30.dev.ENU.wce5.armv4i.cab
However, when i run this application on a device(Dell X50 AXIM) with Pocket PC 2003, it runs fine creating the database and sysnchronising it.
The target platform for the project is Windows Mobile 5.0 Pocket PC SDK.
Does any one have any clue what could be the problem ?
Regards
Nabeel
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Jun 15, 2006
I am migrating a pocket PC application from VS 2003 to VS 2005 and a few weeks ago I hit the following problem when replicating
A SQL Mobile DLL could not be loaded. Reinstall SQL Mobile. [ DLL Name=sqlceca30.dll]
Scanning forums for help I saw that other people had had this problem and one
http://www.eggheadcafe.com/aspnet_answers/NETFrameworkCompactFramework/Feb2006/post25814466.asp
suggested that this problem could be circumvented by getting the replication object early and then continuously using the same object for subsequent replications.
I did this and it works a lot better now but ever so often I get another error which is
Native Error 28559 SQL Mobile encountered problems when opening the database
My only option at this point is to stop and start the application which cures the problem.
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Mar 23, 2006
Hello,
I am developping a non-managed C++ application for PocketPC using a SQL Server mobile database.
The application is compiled for PocketPC 2003 and uses SQL Server Mobile v2. I use Visual Studio 2005. But I need to compile the application for Windows Mobile 5.0 devices. So I installed the WM5 SDK and had the WM5 into my project configuration.
The "ssceoledb.h" which I include incluses the "transact.h" file. But my problem is that this file is only provided with the PocketPC 2003 SDK and not in the WM5 SDK.
So I cannot use the WM5 configuration project with SQL Server. I also tried with the last SQL Server Mobile 2005 (ie v3.0) and the "ssceoledb30.h" also includes "transact.h".
Did I miss something to install ?
Do you know how I can resolve the problem ?
By advance, thank you for any answer.
--
Gregoire
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May 18, 2006
Using MS VS 2005 (incl SQL Server Mobile)
MS Pocket PC 2005 SDK
I am working on a project that builds for Pocket PC on both Mobile 2003 and Mobile 5. The project uses/will use SQL Server Mobile to store local data.
Project created from new with support for both platforms. I include required header files ssceerr30.h and ssceoledb30.h.
Project builds fine in WM2003 configuration, release and debug.
When I build for WM5 the compiler cannot find the header file transact.h. This is included from within ssceoledb30.h. Same as under WM2003.
In WM2003 configuration if I highlight the ssceoledb30.h include in Visual Studio and open the header, it takes me to <Visual Studio dir>SmartDevicesSDKSQL ServerMobilev3.0. I then locate the include for transact.h and do the same, which takes me <Visual Studio dir>SDKPocketPC2003include. The file exists.
If I repeat the above 'browsing' under the WM5 configuration, ssceoledb30.h takes me to a different copy in the WM5 SDK directory. There is no diff between the file here and the other copy used by WM2003. If I attempt to open transact.h - file does not exist.
Fix (which I'm not too sure about, i.e. is it OK?) - If I copy transact.h to the WM5 SDK directory, the project builds.
Why has transact.h disappeared from WM5 SDK?
I can find no ref's to this problem anywhere. Is my installation of the WM5 SDK corrupt? What else could I be missing?
Is there a sample for SQL Server mobile (like the NorthwindOLEDB sample) that comes configured to build for WM5?
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Mar 6, 2006
It is possible to access a Sql Server 2005 Mobile database in a VS2003 application (compact framework) ?
Thanks
Robson
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Sep 8, 2007
I receive error 25123 on my PPC (audiovox 6600) in a reproducable way (usually) with .net 2.0 application that is using SQL CE that I wrote:
Open the application
Connect to the database
Close the applicaton
Re-Open the application
Connect to the database <-- Error occurs
I will also receive the error if my application isn't the first application launched (or very close to the first to launch).
I don't believe it's a memory issue as according to the memory manager I have plenty of memory:
At boot up only start screen items loaded: 18.46 Used 49.89 Free
Launch Resco File Explorer to click EXE: 19.18 Used 49.18 Free
Launch my application (no DB connection): 23.64 Used 44.71 Free
Connect to the DB and do select count(*) from a table with 0 rows: 26.27 Used 42.08 Free
Close the application (this.Close() on the form: 19.38 Used 48.97 Free
Relaunch App and connect to DB receive error: around 38 Used around 30 free
I was unable to reproduce the issue right now while typing this message, the last sets of numbers are from memory, and include other applications that are currently running.
The only way I have to get SQL CE to load again is to soft reset the PPC. If the application is able to connect to SQL CE at least once it is fine up till I close it and re-open the application. So it either connects and runs great, or it can't connect at all.
Any help in resolving this issue would be greatly appreciated.
Wayne
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Apr 24, 2006
Hi folks, I'm new to Windows Mobile progamming, and new to this forum. Apologies in advance if I'm asking a boneheaded question, but I've done searches and can't find anything directly applicable to my problem.
I'm currently walking through the published MS tutorial in setting up an SQL Server 2005 Mobile application that subscribes to a publication on SQL Server 2005 to exchange information.
I've gotten almost all the way through... successfully set up the server components, creating the publication, etc. On the mobile side, I've been able run the cab files to install the SQL Mobile components and to create the project, add the reference to the dll, and instantiate an engine object. It compiles.
The step in the tutorial after that, though, where you specify the data source from the "data" menu, I've got a problem. When I try to use the "new connection" dialog from choosing the data connection, "MS SQL Server Mobile Edition" doesn't show up as a choice. I've tried choosing any of the other combinations, and in teh subsequent "Connection properties" section my database, SQLMobile (as in their sample) is available, but I get an error when I choose it and click OK. Clicking on "Test Connection" gives me a connection successful message.
My guess is that something about the Mobile server side components is not installed correctly on my development machine, but honestly I have no idea how to begin to fix it. Has anyone seen this problem before and know how to resolve it?
Your time and any knowledge sharing is greatly appreciated.
Thank you,
-Dana
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Jul 21, 2006
This is a great tutorial and it's a shame one of the more important steps was missed.
In the €œCreate the snapshot user€? section you you find the steps to create the snapshot_agent account. Then in the €œCreate the snapshot folder€? section you find the share and folder permissions. However, at no point do the instructions advise you about adding the snapshot_agent to the SQL Server Logins. The result is that agent cannot perform the initial snapshot but you won't find this out until 50 steps later after Step 10 in the section €œCreate a new subscription".
To get back on track, openthe Object Explorer's Security section and add the snapshot_agent to your logins. Then using the "User Mappings", set an appropriate level for the SQLMobile database role. Once completed you then need to run the agent.
Right-click the SQLMobile publication you created and select "View Snapshot Agent status". From that dialog you can select "Start" to run the agent. When it completes, you can return to the tutorial section "Create a new subscription" and continue with the tutorial.
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Nov 3, 2007
I am studying the tutorial in SQL Server 2005 Mobile Edition Books Online, and the topic is Creating a Mobile Application with SQL Server Mobile. I have got a problem when creating a new subscription after created a new SQL Server Mobile database. And the problem is shown below:
New Subscription Wizard
- Beginning Synchronization (Success)
- Synchronizing Data (100%) (Error)
Messages
* Failure to connect to SQL Server with provided connection information. SQL Server does not exist, access is denied because the IIS user is not a valid user on the SQL Server, or the password is incorrect.
HRESULT 0x80004005 (29061)
* 無法完æˆ?作æ¥ã€‚
- Finalizing Synchronization (Stopped)
- Saving Subscription Properties (Stopped)
Before I have met this problem, I have finished all the task. And I can browse the localhost web site by using anonymous account even I use internet explorer or browse the directly in IIS.
Does anyone can solve it?? Thank you very much~~~
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Sep 16, 2007
Hi:
When I try and connecto to SQL CE I always get an invalid operation exception. I"m afraid that I did not follow the proper install for Orcas Beta 2. I can't remember if I was supposed to uninstall SQL Mobile 2005 first or not.
All I know is when I try and use my SQL CE I can't connecto to a DB / sdf file ?
Any help would be appreciated I"m just starting to use SQL CE.
thanks
mark
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Aug 4, 2000
I was wondering if anyone out there knows if it is possible to encrypt a particular field in a table, or encrypt a whole table. The info would remain on my database and not be sent out anywhere, but I just want an extra level of security against anyone who might try to break into the database.
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Feb 23, 2000
Is there a function that can encryp the data in a table(or certain column)?
So if the table or column was query the person would see something like " !#)&%^#@ ". suggestion are welcome.
Kevin
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Jun 19, 2002
Hello,
Is there a way to encrypt the data ( I mean actual data stored
in a table)in a SQLServer.
I know how to encrypt procedures, views, Net-libraries ......
Please help!!!!
Thanks.
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Aug 23, 2002
How to get the encryption of certain characters, such as '12345' or 'hello'. Is any function to take regular characters and return the encryption form of those characters?
Please help.
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Nov 6, 2005
My client requested that the password field of a login table be encrypted using H5 Encryption. I've been searching throughout the net and MSDN for the function or procedure and can't find it. Does anybody know how?
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Apr 23, 2008
I developed a small VB6 application VB6 that get data from SAP sql database
Now they want that the users logon to this small app using the same username & password that they used in SAP
I can read the users' table, I can get the username
But the password is encrypted
Probably with a Function
Anybody know how can I encrypt the typed password so I can compare with the saved password
I don't want to view or modify them, just compare with the password typed by the user
Thanks
JG
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Jul 7, 2005
Hello,
I am needing to migrate an Access database to Sql Server
Express. This database will be distributed as part of a
VB 6 application. This database will have some of the
columns encrypted. My understanding is that SQL Server
Express supports encryption. We will need to be able to
run queries on encrypted data like this, with
LastName being an encrypted column in the database.
Select LastName from Account where LastName = 'Smith'
Select LastName from Account where LastName Like 'Sm%'
Update Account Set where LastName = sLastName
Can this be done using SQL Server 2005 Express and VB 6?
Thanks!
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Apr 4, 2007
hi all,
ive download some application, but they encrypt their Stored Proc and some Views..
1.how to encrypt SP?
2.is it possible to decrypt whateva that encrypted?
~~~Focus on problem, not solution~~~
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Oct 3, 2007
Hai
I am new to SQL server and working on Encryption.I just want to know whether it is better to encrpt a data in database or in the code itself.I want to encrypt a number and not a text.which one would u suggest RC4 algorithm or pwdencrypt..any one plz reply soon..
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Oct 3, 2007
Hi. Im new to SQLserver. I need to encrypt a column of datatype decimal. Which is better RC4 Algorithm or PWDencrypt() and PWDcompare().
Sundaresan.R
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Feb 28, 2008
how i can open encrypted stored procedure
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Apr 12, 2007
Hi,
i was wondering if the whole table can be encrypted using MS SQL Server 2005. This at present can be done using third party softwares.
Performance won't be an issue.
Thanks and regards,
Chandrachurh
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Jan 11, 2008
I am using server 2005 running on a windows server 2003 platform. I am trying to do field encryption using symmetric key implemented by the AES algorithm. I created an AES key and apparently it encrypts the data with no problem, however when I try to retrieve the data after decryption the field is always null. I tried using the same process while using the DES or RC2 algorithm and I could both encrypt and decrypt information, however it does not decrypt for any of the AES algorithm i.e. AES_128, AES_192 and AES_256. Attached is a simple query I used to test it.
create symmetric key CCardKeys
with algorithm = aes_192
encryption by password = 'P@s$w0rD'
open symmetric key CCardKeys
decryption by password = 'P@s$w0rD'
declare @Id varchar(50)
set @Id = encryptbykey(key_guid('CCardKeys'),'Test')
select convert(varchar(50),decryptbykey(@Id))
close symmetric key CCardKeys
Is there something I'm missing with AES.
Thanks for taking the time to help me.
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Apr 19, 2007
Here is my goal please let me know if it is possible.
I have installed sql express on clients machines. I don't want them to be able to view the sp's or the functions. I would like to go as far as not allowing them to see the tables. I tried with encrption but this is still breakable by the user using the DAC.
Thanks
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Mar 5, 2007
I have a user table with Fields:
UID, name, SSN, phone,address. I need to encrypt all the fields except UID. My company recently moved to sql server 2005 and I have to encrypt old data. We do perform query search based on username and SSN
I have very shallow knowledge of encryption and indexes. I did looked at one of the articles on encrypting data on existing application but could not understand the indexing part(:()
Do i have to define new fields with varbinary as datatype(for ssn, name,phone number) ? I am asking this because in the demo only ssn_index has varbinary and the ssn field is still nvarchar?
Any help will be appreciated.
Thanks,
K
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Sep 4, 2006
I have tried to encrypt by certificate and by symmetric key. In all cases the decryption comes back as null. Any ideas why?
I have used the code from a learnin tree course and the encryption works OK. I have also added a grant to the certificate to the login
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Apr 19, 2007
I am trying to create a encrypted row in my database Everything here worked except that when i run the final query to decrypt the data It just comes up with null for each row. Even if i do a query to show me the rows that are not null It's like it is saying yeah there is data here but I am only going to show you null instead of what I am supposed to decrypt.Here is what I tried from start to finish Create Certificate
TestCert
Encryption By Password = 'Password'
With Subject = 'SQLCert',
Expiry_Date = '12/01/2050';
declare @Test nvarchar(50)
set @Test='123456789'
insert into testenc (testencry)
Values
(encryptbyCert(Cert_ID('TestCert'),@Test ))
select convert (Nvarchar(50),
DecryptByCert(Cert_ID('TestCert'),
testencry,N'Password')) As Test
from testenc
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