Log out the keystore level also

Author: harri35

app-domain/src/main/java/mobi/lab/hardwarekeybasedencryptedstoragetester/domain/entities/KeyStoreLevel.kt

@@ -0,0 +1,21 @@
+package mobi.lab.hardwarekeybasedencryptedstoragetester.domain.entities
+
+sealed class KeyStoreLevel {
+    object None : KeyStoreLevel() {
+        override fun toString(): String {
+            return "None"
+        }
+    }
+
+    object TEE : KeyStoreLevel() {
+        override fun toString(): String {
+            return "TEE hardware"
+        }
+    }
+
+    object Strongbox : KeyStoreLevel() {
+        override fun toString(): String {
+            return "Strongbox Keymaster hardware"
+        }
+    }
+}

app-domain/src/main/java/mobi/lab/hardwarekeybasedencryptedstoragetester/domain/entities/StorageSpeedMeasurementResults.kt

@@ -6,6 +6,7 @@ import java.math.RoundingMode
 
 @Suppress("LongParameterList")
 class StorageSpeedMeasurementResults(
+    val keyStoreLevelForEncrypted: KeyStoreLevel,
     val dataSizeBytes: Int,
     val writeClearText: StorageSpeedMeasurement,
     val writeEncrypted: StorageSpeedMeasurement,
@@ -30,7 +31,8 @@ class StorageSpeedMeasurementResults(
             roundAndFormatToSec(deleteClearText.standardDeviationSec),
             roundAndFormatToSec(deleteEncrypted.averageSec),
             roundAndFormatToSec(deleteEncrypted.standardDeviationSec),
-            dataSizeBytes.toString()
+            dataSizeBytes.toString(),
+            keyStoreLevelForEncrypted.toString()
         )
     }
 

app-domain/src/main/java/mobi/lab/hardwarekeybasedencryptedstoragetester/domain/gateway/StorageGateway.kt

@@ -1,5 +1,6 @@
 package mobi.lab.hardwarekeybasedencryptedstoragetester.domain.gateway
 
+import mobi.lab.hardwarekeybasedencryptedstoragetester.domain.entities.KeyStoreLevel
 import mobi.lab.hardwarekeybasedencryptedstoragetester.domain.entities.StorageException
 import java.lang.reflect.Type
 
@@ -15,4 +16,6 @@ interface StorageGateway {
     fun removeData(tag: String)
 
     fun getTypeName(): String
+
+    fun getKeyStoreLevel(): KeyStoreLevel
 }

app-domain/src/main/java/mobi/lab/hardwarekeybasedencryptedstoragetester/domain/usecases/storage/StorageTestUseCase.kt

@@ -63,6 +63,7 @@ class StorageTestUseCase @Inject constructor(
         }
 
         return StorageSpeedMeasurementResults(
+            keyStoreLevelForEncrypted = encryptedStorageGateway.getKeyStoreLevel(),
             writeClearText = writeClearText,
             writeEncrypted = writeEncrypted,
             readClearText = readClearText,

app-domain/src/main/res/values/strings.xml

@@ -2,6 +2,7 @@
 <resources>
     <string name="text_measurement_log_line">
 "
+KeyStoreLevel: %14$s
 Write %13$s bytes (sec)
 cleartxt %1$s avg %2$s stdev
 encrypt %3$s avg %4$s stdev

app-infrastructure/src/main/java/mobi/lab/hardwarekeybasedencryptedstoragetester/infrastructure/storage/StorageClearTextImpl.kt

@@ -7,6 +7,7 @@ import android.text.TextUtils
 import com.google.gson.Gson
 import com.google.gson.GsonBuilder
 import com.google.gson.JsonSyntaxException
+import mobi.lab.hardwarekeybasedencryptedstoragetester.domain.entities.KeyStoreLevel
 import mobi.lab.hardwarekeybasedencryptedstoragetester.domain.entities.StorageException
 import mobi.lab.hardwarekeybasedencryptedstoragetester.domain.gateway.ClearTextStorageGateway
 import java.lang.reflect.Type
@@ -81,6 +82,10 @@ class StorageClearTextImpl @Inject constructor(private val appContext: Context)
 
     override fun getTypeName() = "Clear text storage"
 
+    override fun getKeyStoreLevel(): KeyStoreLevel {
+        return KeyStoreLevel.None
+    }
+
     private fun getSharedPrefsFor(tag: String): SharedPreferences {
         return appContext.getSharedPreferences(getStoragePrefix(tag), Context.MODE_PRIVATE)
     }

app-infrastructure/src/main/java/mobi/lab/hardwarekeybasedencryptedstoragetester/infrastructure/storage/StorageEncryptedImpl.kt

@@ -9,6 +9,7 @@ import androidx.security.crypto.MasterKey
 import com.google.gson.Gson
 import com.google.gson.GsonBuilder
 import com.google.gson.JsonSyntaxException
+import mobi.lab.hardwarekeybasedencryptedstoragetester.domain.entities.KeyStoreLevel
 import mobi.lab.hardwarekeybasedencryptedstoragetester.domain.entities.StorageException
 import mobi.lab.hardwarekeybasedencryptedstoragetester.domain.gateway.EncryptedStorageGateway
 import java.lang.reflect.Type
@@ -83,6 +84,17 @@ class StorageEncryptedImpl @Inject constructor(private val appContext: Context)
 
     override fun getTypeName() = "Encrypted storage"
 
+    override fun getKeyStoreLevel(): KeyStoreLevel {
+        val masterKey = createOrGetMasterKey()
+        return if (masterKey.isStrongBoxBacked) {
+            KeyStoreLevel.Strongbox
+        } else if (masterKey.isKeyStoreBacked) {
+            KeyStoreLevel.TEE
+        } else {
+            KeyStoreLevel.None
+        }
+    }
+
     private fun getEncryptedSharedPreferencesFor(tag: String): SharedPreferences {
         val masterKey: MasterKey = createOrGetMasterKey()
 

app/build.gradle

@@ -24,7 +24,7 @@ ext {
      */
     versionMajor = 1
     versionMinor = 0
-    versionPatch = 1
+    versionPatch = 2
     versionBuild = 0 // Use this when builds with the same version are needed. Change to 0 once done
     initVersioning()
 }