HI ! I need to store Key-Value info in a multiplat...

# multiplatform

[Marc Planas]

HI ! I need to store Key-Value info in a multiplatform project, basically api keys, codes and refresh tokens, which library would you recomend me ? I’m trying to access it from the Common part, i’m trying to use native UI but put everything else in the common module

[Moussa]

check multiplatform-settings => https://github.com/russhwolf/multiplatform-settings

[Marc Planas]

is it secure for my purpose ?

[Moussa]

And check this one SQLDelight => https://cashapp.github.io/sqldelight/2.0.1/

[Moussa]

SQLDelight: is an actual SQLite database (take care when using it for JS)
multiplatform-settings: key-value data which is different per platform
• Apple uses UserDefaults
• Android uses SharedPreferences
• JVM uses PropertiesSettings
• JS uses Storage
• Windows uses RegistrySettings

[Roland]

Multiplatform settings supports encryption delegates (e.g. encrypted shared preference)

[youssef]

Ya its secure it will encrypte your values

[Marc Planas]

i think i will use “multiplatform settings”, is there any example or sample ? what i found is half exmplained, looking for a real project, i’m struggling to pass the delegates

[youssef]

Sure i can explain it to u lets hop on a call real quick i sent u a dm

[Roland]

This is how I do it in my project

iosMain:

import com.russhwolf.settings.ExperimentalSettingsImplementation
import com.russhwolf.settings.KeychainSettings

actual class EncryptedSettingsFactory(
) {
    @OptIn(ExperimentalSettingsImplementation::class)
    actual fun create(): EncryptedSettingsRepository {

return EncryptedSettingsRepository(
            KeychainSettings(service = "ENCRYPTED_SESSION_SETTINGS")
        )
    }
}

private val encryptedSettingsRepository: EncryptedSettingsRepository by lazy {
        EncryptedSettingsFactory().create()
    }

androidMain:

import android.content.SharedPreferences
import com.russhwolf.settings.SharedPreferencesSettings

actual class EncryptedSettingsFactory(
    private val sharedPrefs: SharedPreferences
) {
    actual fun create(): EncryptedSettingsRepository {

return EncryptedSettingsRepository(
            SharedPreferencesSettings(sharedPrefs)
        )
    }
}

fun  Application.createEncryptedSettingsRepository(): EncryptedSettingsRepository {
    val masterKey = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC)
    val encryptedPrefs = EncryptedSharedPreferences.create(
        /* fileName = */ "ENCRYPTED_SESSION_SETTINGS",
        /* masterKeyAlias = */ masterKey,
        /* context = */ this,
        /* prefKeyEncryptionScheme = */ EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
        /* prefValueEncryptionScheme = */ EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
    )
    return EncryptedSettingsFactory(
        encryptedPrefs
    ).create()
}

private val encryptedSettingsRepository: EncryptedSettingsRepository by lazy {
        context.createEncryptedSettingsRepository()
    }

commonMain

expect class EncryptedSettingsFactory {
    fun create(): EncryptedSettingsRepository
}

class EncryptedSettingsRepository(
    private val settings: Settings
) {

fun setMyString(myString: String) {
            settings.putString("my_string", myString)
    }
fun setMyString(myString: String): String? {
            settings.getStringOrNull("my_string")
    }
}

[russhwolf]

Let me know if there's things that are confusing in the docs (readme) or sample app

[McEna]

DataStore has multiplattform support: https://android-developers.googleblog.com/2023/04/whats-new-in-jetpack-multiplatform.html