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Implement PIN and Biometric authentication (#48)
Fixes #20
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13 changes: 13 additions & 0 deletions
13
app/src/main/java/com/xinto/mauth/core/auth/AuthManager.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| package com.xinto.mauth.core.auth | ||
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| import kotlinx.coroutines.flow.Flow | ||
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| interface AuthManager { | ||
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| fun getCode(): Flow<String?> | ||
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| fun setCode(code: String) | ||
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| fun removeCode() | ||
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| } |
54 changes: 54 additions & 0 deletions
54
app/src/main/java/com/xinto/mauth/core/auth/DefaultAuthManager.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package com.xinto.mauth.core.auth | ||
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| import android.content.Context | ||
| import android.content.SharedPreferences | ||
| import androidx.core.content.edit | ||
| import androidx.security.crypto.EncryptedSharedPreferences | ||
| import androidx.security.crypto.MasterKey | ||
| import kotlinx.coroutines.channels.awaitClose | ||
| import kotlinx.coroutines.flow.Flow | ||
| import kotlinx.coroutines.flow.callbackFlow | ||
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| class DefaultAuthManager( | ||
| context: Context | ||
| ) : AuthManager { | ||
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| private val prefs = EncryptedSharedPreferences.create( | ||
| context, | ||
| "auth", | ||
| MasterKey(context = context), | ||
| EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV, | ||
| EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM, | ||
| ) | ||
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| override fun getCode(): Flow<String?> { | ||
| return callbackFlow { | ||
| val listener = SharedPreferences.OnSharedPreferenceChangeListener { sharedPreferences, key -> | ||
| if (key == KEY_CODE) { | ||
| trySend(sharedPreferences.getString(KEY_CODE, null)) | ||
| } | ||
| } | ||
| send(prefs.getString(KEY_CODE, null)) | ||
| prefs.registerOnSharedPreferenceChangeListener(listener) | ||
| awaitClose { | ||
| prefs.unregisterOnSharedPreferenceChangeListener(listener) | ||
| } | ||
| } | ||
| } | ||
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| override fun setCode(code: String) { | ||
| prefs.edit { | ||
| putString(KEY_CODE, code) | ||
| } | ||
| } | ||
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| override fun removeCode() { | ||
| prefs.edit { | ||
| remove(KEY_CODE) | ||
| } | ||
| } | ||
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| private companion object { | ||
| const val KEY_CODE = "code" | ||
| } | ||
| } |
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34 changes: 34 additions & 0 deletions
34
app/src/main/java/com/xinto/mauth/domain/AuthRepository.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| package com.xinto.mauth.domain | ||
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| import com.xinto.mauth.core.auth.AuthManager | ||
| import kotlinx.coroutines.flow.Flow | ||
| import kotlinx.coroutines.flow.first | ||
| import kotlinx.coroutines.flow.last | ||
| import kotlinx.coroutines.flow.map | ||
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| class AuthRepository( | ||
| private val authManager: AuthManager | ||
| ) { | ||
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| private val liveCode = authManager.getCode() | ||
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| fun observeIsProtected(): Flow<Boolean> { | ||
| return liveCode.map { it != null } | ||
| } | ||
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| suspend fun isProtected(): Boolean { | ||
| return liveCode.first() != null | ||
| } | ||
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| suspend fun validate(code: String): Boolean { | ||
| return liveCode.first() == code | ||
| } | ||
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| fun updateCode(code: String) { | ||
| authManager.setCode(code) | ||
| } | ||
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| fun removeCode() { | ||
| authManager.removeCode() | ||
| } | ||
| } |
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