C# Sqlite SQLCipher 加密

安装

    ● Visual Studio PowerShell

Remove-Package Microsoft.Data.Sqlite
Install-Package Microsoft.Data.Sqlite.Core
Install-Package SQLitePCLRaw.bundle_e_sqlcipher

    ● 在 Nuget Package Manager 安装

选择 Microsoft.Data.Sqlite.Core 和 SQLitePCLRaw.bundle_e_sqlcipher

导入包

using Microsoft.Data.Sqlite;
using System;

连接已加密的数据库

public static void Main() {
    var connectionString = new SqliteConnectionStringBuilder() {
        Mode = SqliteOpenMode.ReadWrite,
        Password = "123", // 数据库密码
        DataSource = "resource/database.db", // 数据库文件路径
    }.ToString();
    SqliteConnection connection = new SqliteConnection(connectionString);
    connection.Open();
    Work(connection);
    connection.Close();
}

查询示例

public static void Work(SqliteConnection connection) {
    var command = connection.CreateCommand();
    command.CommandText = @"select count(*) from t_user";

    using (var reader = command.ExecuteReader()) {
        while (reader.Read()) {
            int n = reader.GetInt32(0);
            Console.WriteLine($"t_user 一共有 {n} 行");
        }
    }
}

修改已加密的数据库密码

public static void Work(SqliteConnection connection) {
    var command = connection.CreateCommand();
    string newPassword = "12345";
    command.CommandText = $"PRAGMA rekey = '${newPassword}'";
    command.ExecuteNonQuery();
}

参考链接

https://docs.microsoft.com/en-us/dotnet/standard/data/sqlite/encryption?tabs=visual-studio
https://www.zetetic.net/sqlcipher/