cryptAPI in CE 6.0 - Mobile Discussion Boards

Hi, i'm developing a Pocket PC Application. I am working on security issues, so i was wondering if there is any way to modify the connection string: adding the ip of the server instead of the server name.

The application is working with this string:

String RDAOleBDConnectionString = "Provider=SQLOLEDB;Data Source=" + NombreServidor + "," + Puerto + ";Integrated Security=SSPI;Initial Catalog =" + NombreBD + ";";

to something like this:

Data Source=190.190.200.100,1433;Network Library=DBMSSOCN;Initial Catalog=myDataBase;User ID=myUsername;Password=myPassword;

i tried to use the last one but i got errors about the provider.
thanks for any help

I am using:

Data Source=190.190.200.100,1433;Initial Catalog=myDatabase;User ID=myUsername;Password=myPassword;

Kind Regards.

Hey Guys,

I have a working program that uses SetWindowsHook to capture low level keyboard messages of my pocket pc. This only captues the hardware buttons.

I want to hook the stylus tapping the screen.

How can this be done? Can it be done with SetWindowsHook?

Michael
mjmimmm@hotmail.com

Hello All,

Currently I get whole mobile socrce code developeed for English. I want to make a sepeate image for a new language, apart from default supported 20 languages by Microsoft.

For our applications, I can get .rc file and add string table for new language and I am able to display the applications in local language what I need.

But for OS applications, menus and error messages, I am not sure how to proceed. Can any one help me to give a artcile or book reference how to localize the whole mobile and not single application.

Thanks and Regards
Blr Boy.

hi all...im creating a mobile application that needs to run constantly...is there a way to disable the sleep mode accross different versions of win mob., the earliest will be 2003, is there a way to achieve this?
thanks in advance.

living life on the flip side

I know only this way: Your application would must send a keystroke every 30 seconds which makes the operating system think it is being used. This does not stop the screen from auto dimming - this must be set in the CE device System configuration.
I have actually installed an application provided of this feature.
I hope this help you.

http://www.codeproject.com/KB/mobile/WiMoPower1.aspx

Search for "Don't let the device sleep."

In short you need to call SystemIdleTimerReset() every so often. the exact rate at which you need to call it will vary based on device settings. There is an example program in this article that will show you how to do it.

Joel Ivory Johnson (J2i.net)
Live Messenger

Hi Iam trying with Assymetric Encryption with cryptAPI in CE 6.0... GetCryptoKey Iam passing public key and try to encrypt it.. but it gives error... can any body check the GetCryptoKey ()function and give me the suggesstions

static public byte[] Encrypt(string pulickey, byte[] data)
{
if (!WinApi.CryptAcquireContext(ref hProv, null, WinApi.MS_DEF_PROV,
WinApi.PROV_RSA_FULL, WinApi.CRYPT_VERIFYCONTEXT))
Failed("CryptAcquireContext");

// generate encryption key from passphrase
hKey = GetCryptoKey(hProv, pulickey);

// determine how large of a buffer is required
// to hold the encrypted data
uint dataLength = (uint)data.Length;
uint bufLength = (uint)data.Length;
if (!WinApi.CryptEncrypt(hKey, IntPtr.Zero, true,
0, null, ref dataLength, bufLength))
Failed("CryptEncrypt");
}

static private IntPtr GetCryptoKey(IntPtr hProv, string pulickey)
{
// crypto handles
IntPtr hHash = IntPtr.Zero;
IntPtr hKey = IntPtr.Zero;

try
{
// create 128 bit hash object
if (!WinApi.CryptCreateHash(hProv,
WinApi.CALG_MD5, IntPtr.Zero, 0, ref hHash))
Failed("CryptCreateHash");

// add passphrase to hash
byte[] keyData = ASCIIEncoding.ASCII.GetBytes(passphrase);
if (!WinApi.CryptHashData(hHash, keyData, (uint)keyData.Length, 0))
Failed("CryptHashData");

// Get a handle to the key exchange key.
if (!WinApi.CryptGetUserKey(hProv, 1, ref hProv))
{
uint dwResult = WinApi.GetLastError();
// printf("Error %x during CryptGetUserKey!\n", GetLastError());
//goto done;
}

if (!WinApi.CryptImportKey(hProv, keyData, (uint)keyData.Length, 0, 0, ref hProv))
{
uint dwResult = WinApi.GetLastError();

}
if (!WinApi.CryptGenKey(hProv, WinApi.CALG_RC2, WinApi.CRYPT_EXPORTABLE, ref hKey))
{
uint dwResult = WinApi.GetLastError();
//MessageBox("Error CryptGenKey() failed.", "Information", MB_OK);
// return;
}

// if (!WinApi.CryptGenKey(hProv, WinApi.CALG_RC2, WinApi.CRYPT_EXPORTABLE, ref hKey))
// {
// Failed("CryptGenKey");
// }
}

Hi, i've been looking arround the forum for an answer. well i'm using the kacommon dll from Alex Kwok and i have a little problem. There are some FTP that i won't access no matter what. the problem seems to be when listing the directory content. but i'm not really sure. Has anyone used this component and had a similar problem?
Some Specs for reference:
i dooing an aplicaction for a PockePc with WM6.0, connected via GPRS and it works fine with most FTP servers, but some simple wont acept connection, i think it has something to do with the file sistem on the server, but when i cloned a non-working-with-my-app FTP site, to a Previously-Working-with-my-app FTP Site it didnt work ether, the funny thing is that the non-working-with-my-app site was a clone of the previously-working-with-my-app FTP site. and now none of them works, no funny filenames, or strange symbols nether.
Please help if you can.
Thanks
Black.

hi, i want some code or tutorials specifying how to use bluetooth in mobile for serial communication.

i.e i dont want it use as obex, RFCOMM, L2cap only as com port cant it be if so how is to do..

Programing Bluetooth for serial communication is as any regular serial communication. The difference is the port you specify must be a bluetooth one.

If you want to use WinAPI, I suggest to check C++ articles on that topic. Recently I saw a very good article on codeproject, but can't locate it. now.

If you are using C#, I'm sure there are components for serial components that will do the job for you.

i want code in J2me or java

ya you can do refer to nokia fourms j2me it will be usefull

Please sent me a way to print text using bluetooth printer

ssss

Printing is not supported in Windows Mobile. However this doesn't mean it is impossible.

Here is general plan:
1. Make communication with the printer.
2. Send commands to the printer, so it can print whatever you desire.

First part is pretty much standard and easy. The communication trough bluetooth is usually done as communication trough serial port. Probably sounds a little bit scary, but my routine is around 10 lines of code (just plain API).

The second part is a little bit tricky. It is printer-dependent. Also you need to know at least one of the ways to command the printer.
The easiest way is to learn some of the printer languages- EPL, CPCL, ZPL, ... EPL would be probably the preferred, because it is supported by almost every printer. Personally I prefer CPCL - it is like writing a script.

Most printer support 'Line Mode' - you send them just the text and it prints like in DOS times. However, you should check the manual how to set it up.

P.S. One con about printing with Mobile is that it is quite printer-dependent. If your client have a different one, you will probably need to change the print routine.

Can U expalin it more easy way. I have no idea about printing

ssss

Can U expalin it more easy way. I have no idea about printing

Laugh | :laugh:

There is no easy way Laugh | :laugh:

Anyway, the idea is simple:
You make a connection to the printer trough bluetooth serial communication.
With the connection you send commands to the printer (what to print). This can be done trough a printer language or in 'line mode' (like 'print' in C)

Quite simple Laugh | :laugh:

I don't mean easy way. I mean please explain it more deaply pal. Because I have no idea of Serial communication and printer languages

Dushan Perera

If this can help you, you must imagine the printing from a device using a bluetooth connected printer as to send an SMS through a bluetooth connected cellular.
If to send SMS through a bluetooth connected cellular, the device must send "AT Commands" and the text of SMS to the telephone, to print is necessary to send "ESCAPE Commands" and the text to print to the printer.
How already suggested you, the first step is to establish a bluetooth connection.

modified on Monday, September 29, 2008 3:05 PM

Hi akirilov,

I am very interested in your routine to establish a bluetooth connection.
In particular if it is in VB-Compact Framework (Windows Mobile 2003 SE compatible), and if it supports Widcomm (not Microsoft) bluetooth stack ....

modified on Tuesday, September 30, 2008 6:55 AM

Hi I'm working in this moment with an Symbol MC35 and I have to print by Irda in to a Printer Zebra Mz220, This printer support CPCL, and this is what I do, first open the serial port (in this case com3) and sending the code cpcl for writte in the printer.
How ever the comunications begins and the blue light blinks but, an error message show "IOException", please if any one have a clue about how to fix this I'll appreciate.
thanks Cry | :((

I'm trying to figure out how to include google maps in my application. so i when i get the cords i can render a google map. ideas on how to do this?

You get the langitude and latitude values, supply to google map API.

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

How to use google | Ask smart questions

yeah I get that but how would one render it on the phones screen with out launching IE or some other view.

Hi, moos3,

I have been trying to do the same thing but without any advancement. If you could find any possible way to do that, please let me know.

Thanks in advance,
Renuka Prasad.