Hi there.

Maybe im missing something but can any one help me to decrypt a "toSting" ASCII to nornal readable text.

It works when i'm using to encrypt method "toString" but when i'm want to decrypt it is also sows garbage.

Thanks
Gerald

Here is a little sample on how to encrypt and decrypt with the RSA encryption method:

<code>
private object pubkey;
private object prikey;

static void Main( string[] args )
{
try
{
Program start = new Program();
start.run();
}
catch( Exception ex )
{
Console.WriteLine( ex.ToString() );
}
finally
{
Console.WriteLine( "Fin" );
Console.ReadLine();
}
}

private void run()
{
generateKey();
string test = encryptFunctionStringOnly( "I'm testing the encryption module, with string only" );
string message = decryptFunctionStringOnly( test );

Console.WriteLine( "After Decryption:\n" + message );
}

private void generateKey()
{
XceedEncryptionLib.XceedEncryption encrypt = new XceedEncryptionLib.XceedEncryption();
encrypt.License( "CRY11-GRT9A-J7X75-BNAA" );

XceedEncryptionLib.XceedRSAEncryptionMethod rsa = new XceedEncryptionLib.XceedRSAEncryptionMethod();

try
{
object seed = null;
rsa.SetRandomKeyPair( 1024, ref seed );
prikey = rsa.get_PrivateKey();
pubkey = rsa.get_PublicKey();
}
catch( System.Runtime.InteropServices.COMException except )
{
Console.WriteLine( except.ToString() );
}
}

private string encryptFunctionStringOnly( string message )
{
Console.WriteLine( "Before Encryption:\n" + message );
string encryptKey;
XceedEncryptionLib.XceedEncryption encrypt = new XceedEncryptionLib.XceedEncryption();
encrypt.License( "CRY11-GRT9A-J7X75-BNAA" );
XceedEncryptionLib.XceedRSAEncryptionMethod rsa = new XceedEncryptionLib.XceedRSAEncryptionMethod();
object encryptedData = ( object )"";

try
{
rsa.set_PublicKey( ref pubkey );

encrypt.EncryptionMethod = rsa;
object data = ( object )message;


encryptedData = encrypt.Encrypt( ref data, true );
encryptKey = encrypt.ToString( ref encryptedData );
}
catch( System.Runtime.InteropServices.COMException except )
{
Console.WriteLine( except.ToString() );
}

return Convert.ToBase64String( ( byte[] )encryptedData );
}

private string decryptFunctionStringOnly( string message )
{
XceedEncryptionLib.XceedEncryption encrypt = new XceedEncryptionLib.XceedEncryption();
encrypt.License( "CRY11-GRT9A-J7X75-BNAA" );
XceedEncryptionLib.XceedRSAEncryptionMethod rsa = new XceedEncryptionLib.XceedRSAEncryptionMethod();
string Output = "";
System.Text.UnicodeEncoding enc = new System.Text.UnicodeEncoding();

try
{
rsa.set_PublicKey( ref pubkey );
rsa.set_PrivateKey( ref prikey );
encrypt.EncryptionMethod = rsa;
object encryptedData = ( object )Convert.FromBase64String( message );//enc.GetBytes( message );
Output = enc.GetString( ( byte[] )encrypt.Decrypt( ref encryptedData, true ) );
}
catch( System.Runtime.InteropServices.COMException except )
{
Console.WriteLine( except.ToString() );
}
return ( string )Output;
}
</code>

---

Charles Bérubé-Rémillard
Technical Support
Xceed Software Inc.

owZit.

The vb.net example works great but the project that we working on in a vb6 application. And as you know vb6 does not support the base64 function.

So is there any other way of converting the string without creating a new base64 function.

NB: The vb6 example using the AES encrypts works but I want to keep the hex value constant. It must keep the same value each time.

Thanks