Sign in with Classic

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/auth/ElementClassicSession.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.matrix.api.auth
+
+import io.element.android.libraries.matrix.api.core.UserId
+
+data class ElementClassicSession(
+    val userId: UserId,
+    val homeserverUrl: String?,
+    val secrets: String?,
+    val roomKeysVersion: String?,
+    val doesContainBackupKey: Boolean,
+)

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/auth/MatrixAuthenticationService.kt

@@ -14,6 +14,7 @@ import io.element.android.libraries.matrix.api.auth.external.ExternalSession
 import io.element.android.libraries.matrix.api.auth.qrlogin.MatrixQrCodeLoginData
 import io.element.android.libraries.matrix.api.auth.qrlogin.QrCodeLoginStep
 import io.element.android.libraries.matrix.api.core.SessionId
+import io.element.android.libraries.matrix.api.core.UserId
 
 interface MatrixAuthenticationService {
     /**
@@ -52,6 +53,20 @@ interface MatrixAuthenticationService {
      */
     suspend fun cancelOidcLogin(): Result<Unit>
 
+    /**
+     * Set the existing data about Element Classic session, if any.
+     */
+    fun setElementClassicSession(session: ElementClassicSession?)
+
+    /**
+     * Check if the provided secrets from Element Classic session contain a key backup.
+     */
+    fun doSecretsContainBackupKey(
+        userId: UserId,
+        secrets: String,
+        backupInfo: String,
+    ): Boolean
+
     /**
      * Attempt to login using the [callbackUrl] provided by the Oidc page.
      */

libraries/matrix/api/src/test/kotlin/io/element/android/libraries/matrix/api/core/UserIdTest.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.matrix.api.core
+
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+
+class UserIdTest {
+    @Test
+    fun `valid user id`() {
+        val userId = UserId("@alice:example.org")
+        assertThat(userId.extractedDisplayName).isEqualTo("alice")
+        assertThat(userId.domainName).isEqualTo("example.org")
+    }
+}