Encrypted Shared Preferences

This plugin stores Shared Preferences as encrypted values. It is decrypted when retrieved. You could use this side by side with regular Shared Preferences.

Usage

Instantiate class:

EncryptedSharedPreferences encryptedSharedPreferences = EncryptedSharedPreferences();

Save value:

encryptedSharedPreferences.setString('sample', 'Hello, World!').then((bool success) {
    if (success) {
        print('success');
    } else {
        print('fail');
    }
});

Retrieve value:

encryptedSharedPreferences.getString('sample').then((String value) {
    print(value); /// Prints Hello, World!
});

Remove value:

encryptedSharedPreferences.remove('sample').then((bool success) {
    if (success) {
        print('success');
    } else {
        print('fail');
    }
});

Clear values:

/// Clears all values, including those you saved using regular Shared Preferences.
encryptedSharedPreferences.clear().then((bool success) {
    if (success) {
        print('success');
    } else {
        print('fail');
    }
});

Reload

encryptedSharedPreferences.reload();

Optional: Pass custom SharedPreferences instance

/// You can pass a custom SharedPreferences instance (e.g. A newer version of SharedPreferences)
final prefs = await SharedPreferences.getInstance();
EncryptedSharedPreferences encryptedSharedPreferences = EncryptedSharedPreferences(prefs: prefs);

Access internal SharedPreferences instance

// You can access the internal SharedPreferences instance to invoke methods not exposed by regular EncryptedSharedPreferences
SharedPreferences instance = await encryptedSharedPreferences.getInstance();
int counter = 1;

/// Access SharedPreferences' setInt method
await instance.setInt('counter', counter);

Modes of operation

Default mode is SIC AESMode.sic, you can override it using the mode named parameter:

EncryptedSharedPreferences encryptedSharedPreferences = EncryptedSharedPreferences(mode: AESMode.cbc);

Supported modes are:

• CBC AESMode.cbc
• CFB-64 AESMode.cfb64
• CTR AESMode.ctr
• ECB AESMode.ecb
• OFB-64/GCTR AESMode.ofb64Gctr
• OFB-64 AESMode.ofb64
• SIC AESMode.sic