Encrypted sqlite database
![encrypted sqlite database encrypted sqlite database](https://img.wonderhowto.com/img/97/75/63665872470384/0/decrypting-local-sqlite-db.w1456.jpg)
- #Encrypted sqlite database how to
- #Encrypted sqlite database update
- #Encrypted sqlite database full
- #Encrypted sqlite database software
- #Encrypted sqlite database code
The reason is that SQLitePlus has a well defined system for handling BLOB fields. However, there is a major difference: Notice the column data types are prefixed with BLOB. Its a one-to-one mapping of the Product object fields to the table columns (see below for the class definition). This sort of table definition will look familiar to most programmers. Here is the table definition:ĬREATE TABLE Products2(ID INTEGER PRIMARY KEY NOT NULL, Name BLOB_TEXT NOT NULL, QtyPerUnit BLOB_TEXT NOT NULL, Price BLOB_FLOAT NOT NULL, LastOrderDate BLOB_DATE NOT NULL Products2 is for field serialization, so it has individual fields for each data member. Here is the table definition for Products1:ĬREATE TABLE Products1(ID INTEGER PRIMARY KEY NOT NULL, Data BLOB) Table Products1 is for BLOB serialization so it has only the ID and BLOB Data column. I have created a helper function, TableExists, which checks the sqlite_master table for the table name. This is necessary for using the SQLitePlus ENCRYPT and DECRYPT SQL extenstions. The first time you run the project, the database file (sqlite.db) will be created. This actually creates or opens the database file. Just use "demo" (you can use SQLitePlus with no license, but with a 10 row limit for dataset results). The second parameter is for the license key. If the version DLL is not in the same folder as the COM DLL, you must also specify its path.
![encrypted sqlite database encrypted sqlite database](https://i1.wp.com/blogs.embarcadero.com/wp-content/uploads/2020/05/firedac-image-no-title01.jpg)
Notice I have specified the version DLL name in the Init method call. MDB.CipherKey = "12345678" // cipher key up to 32 bytes (256 bytes) MDB.Open( Application.StartupPath + -1, false ) Here we will initialize SqliteDb, open the database and set the cipher key. Now scroll down to the form's Load event handler. Add this line near the top of the class definition: OK, now we're ready to add a SqliteDb member variable which we can use for our serialization functions. Now in MainFrm.cs, add this "using" statement near the top of the file: In the "Add Reference" dialog, scroll down and find "EzTools SqlitePus 3.5 COM DLL", as shown here: Here is the download link:Īfter registering the SQLitePlus COM DLL, we are ready to start by adding a reference to the SQLitePlus COM DLL in your project. It is very useful for visualizing your data as you experiment with the SQLitePlus COM DLL in your code. Note: You can also download the SQLitePlus Database Manager from the EzTools website.
![encrypted sqlite database encrypted sqlite database](https://www.domador.net/wp-content/uploads/2017/04/EncryptingAnUnencryptedDB.png)
cmd file is included that does this for you (click on runme.cmd).
#Encrypted sqlite database code
These DLLs are included in the source code Zip file, but you must register the COM DLL to run the projects (using RegSvr32.exe). Also, you can make custom builds of the version DLL, for example to add your own User Defined Functions.
#Encrypted sqlite database update
For example, a new version of the SQLite engine is released, so you only need to update the version DLL rather than both. The reason it is split into 2 DLLs is so that newer versions of the version DLL can be swapped-in without changing the COM DLL. The other DLL is a "version DLL" which is a plain DLL (not COM) that encapsulates the SQLite database engine C code. Using these COM class objects we can create new database files, execute SQL commands and get back result datasets. They are the SqliteDb, Dataset, Columns and Column classes. It consists of 2 DLLs - the COM DLL, which provides the COM classes you use in your programs.
#Encrypted sqlite database software
Therefore we will use the SQLitePlus COM wrapper from EzTools Software ( First, a bit of background on SQLitePlus. But is all written in C and therefore is not suitable to use from. In case you don't know anything about SQLite, it is a complete SQL database in a single file.
![encrypted sqlite database encrypted sqlite database](https://i.ytimg.com/vi/FkaGAsywNmU/hqdefault.jpg)
It was a happy day that I found out about SQLite, and equally important, SQLitePlus - a COM wrapper for SQLite enabling me to use it from higher level languages (eg. On older computers, that meant installing MDAC (all of the ODBC/OLEDB drivers) - quite a large installer footprint. Until I found SQLite, I had to use MS Access for my desktop application needs. NET objects to an encrypted BLOB column in a SQLite database file or as individual encrypted data fields.
#Encrypted sqlite database how to
This article will show 3 different was how to serialize.
#Encrypted sqlite database full
Some need only simple storage, whereas others need a full SQL database capability for various needs. In that article, I pointed out that most non-enterprise applications need the ability to store data locally.