Feature/add option for sql encryption

README.md

@@ -120,6 +120,29 @@ public ActionResult OnPostAsync()
 }
 ```
 
+## Encryption
+To use SqliteCache with encryption make sure you are using the corresponding providers for your target framework.
+E.g. for Net481: 
+* https://www.nuget.org/packages/SQLitePCLRaw.provider.sqlcipher/2.1.10
+* https://www.nuget.org/packages/SQLitePCLRaw.lib.e_sqlcipher/2.1.10
+
+And make sure to use the correct provider when registering Sqlite
+```csharp
+raw.SetProvider((ISQLite3Provider)new SQLite3Provider_e_sqlcipher());
+serviceCollectionAccess.AddSingleton<SqliteCache>();
+serviceCollectionAccess.AddSingleton<IDistributedCache, SqliteCache>(aServiceProvider => aServiceProvider.GetRequiredService<SqliteCache>());
+```
+
+then just configure SqliteCache with the PasswordOption
+```csharp
+serviceCollectionAccess.Configure<SqliteCacheOptions>(aSqliteCacheOptions =>
+{
+...
+    aSqliteCacheOptions.Password = password;
+...
+});
+```
+
 ## License
 
 SqliteCache is developed and maintained by Mahmoud Al-Qudsi of NeoSmart Technologies. The project is

SqliteCache/SqliteCacheOptions.cs

@@ -39,6 +39,15 @@ public string CachePath
             }
         }
 
+        /// <summary>
+        /// Use this to specify a password for the SqliteConnection that is to be created.
+        /// If no <see cref="SqliteEncryptionPassword"/> is set, the connectionStringBuilder will not use the "Password" option.
+        ///
+        /// CAREFUL! this option will break your SqliteConnection if the sqliteProvider that you are using does not support encryption.
+        /// You will have to use e.g. (SQLitePCLRaw.provider.sqlcipher) instead of (SQLitePCLRaw.provider.e_sqlite3)
+        /// </summary>
+        public string? SqliteEncryptionPassword { get; set; } = null;
+
         /// <summary>
         /// Specifies how often expired items are removed in the background.
         /// Background eviction is disabled if set to <c>null</c>.
@@ -56,6 +65,12 @@ internal string ConnectionString
                     Cache = SqliteCacheMode.Shared
                 };
 
+                // only set the password option if the user actually set a Password
+                if (!string.IsNullOrEmpty(SqliteEncryptionPassword))
+                {
+                    sb.Password = SqliteEncryptionPassword;
+                }
+
                 return sb.ConnectionString;
             }
         }