Allowing to add a password, and not only to remove one.

DecryptSQLite.cs

@@ -21,7 +21,8 @@ static void start ()
 		{
 			String sourceFile = null;
 			String destinationFile = null;
-			String password = "password";
+			String sourcePassword = "password";
+			String destinationPassword = "";
 
 			const string FILTER = "Base de données (*.db3)|*.db3|Tous les fichiers (*.*)|*.*";
 			FileDialog sourceFileSelection = new OpenFileDialog ();
@@ -42,26 +43,24 @@ static void start ()
 			}
 			destinationFile = destinationFileSelection.FileName;
 
-			password = Interaction.InputBox ("Mot de passe pour\n" + sourceFile, "Mot de passe", password);
-			if (password.Length == 0) {
-				return;
-			}
+			sourcePassword = Interaction.InputBox ("Mot de passe pour\n" + sourceFile, "Ancien mot de passe", sourcePassword);
+			destinationPassword = Interaction.InputBox ("Mot de passe pour\n" + destinationFile, "Nouveau mot de passe", destinationPassword);
 
 			const string CONNECTION_STRING = "URI=file:{0};Version=3;Password={1};";
 			if (!sourceFile.Equals (destinationFile)) {
 				File.Copy (sourceFile, destinationFile);
 			}
-			String connectionString = String.Format (CONNECTION_STRING, destinationFile, password);
+			String connectionString = String.Format (CONNECTION_STRING, destinationFile, sourcePassword);
 
 			try {
 				SQLiteConnection connection = new SQLiteConnection (connectionString);
 				connection.Open ();
 				try {
-					connection.ChangePassword ("");
+					connection.ChangePassword (destinationPassword);
 					connection.Close ();
-					MessageBox.Show ("Mot de passe supprimé avec succès!", "Succès", MessageBoxButtons.OK, MessageBoxIcon.Information);
+					MessageBox.Show ("Mot de passe changé avec succès!", "Succès", MessageBoxButtons.OK, MessageBoxIcon.Information);
 				} catch (Exception e) {
-					MessageBox.Show ("Erreur lors de la suppression du mot de passe:\n" + e, "Erreur", MessageBoxButtons.OK, MessageBoxIcon.Error);
+					MessageBox.Show ("Erreur lors du changement de mot de passe:\n" + e, "Erreur", MessageBoxButtons.OK, MessageBoxIcon.Error);
 				}
 			} catch (Exception e) {
 				MessageBox.Show ("Erreur lors de l'ouverture de la base de données:\n" + e, "Erreur", MessageBoxButtons.OK, MessageBoxIcon.Error);

README.md

@@ -1,10 +1,10 @@
 # DecryptSQLite
 
-This repository contains a simple utility, written in C#, which allows to remove the password from
+This repository contains a simple utility, written in C#, which allows to change the password of
 an encrypted SQLite database (created with [System.Data.SQLite](https://system.data.sqlite.org)).
 
-Note that you have to know the password in order to remove it (the goal of this utility is not to
-help recovering a lost password).
+Note that you have to know the old password in order to change it (the goal of this utility is
+not to help recovering a lost password).
 
 ## How to build
 
@@ -25,14 +25,19 @@ It might not be compatible with other versions.
 
 * Execute `DecryptSQLite.exe` (e.g. by double-clicking on it).
 
-* A dialog box to select the database file is displayed. Please select the SQLite encrypted
-database file (.db3) and click on Open.
+* A dialog box to select the database file is displayed. Please select the source SQLite database
+file (.db3) and click on Open.
 
-* Another dialog box then asks where to save the unencrypted database. You can change the default path
+* Another dialog box then asks where to save the changed database. You can change the default path
 (if needed) and validate by clicking on Save.
 
-* Another dialog box then asks for the password to decrypt the encrypted database. Type the password
-and click OK.
+* Another dialog box then asks for the password of the source database to decrypt it. Type
+the password and click on OK. If the source database is not encrypted, you can either click on Cancel
+or empty the field and click on OK.
+
+* Another dialog box then asks for the new password to encrypt the database. Type the new password
+and click on OK. If you don't want to encrypt the changed database, you can either click on Cancel,
+or make sure the field is empty and click on OK.
 
 * When the password removal operation completes successfully, a success message is displayed.
 Otherwise, an error message can be displayed.