Better error handling and fixes for key import

TODO.md

@@ -1,3 +1,5 @@
+rename hinterfacebox
+translated arg for avatar upload and login
 - Refactoring
   - Banners
 

src/python/backend.py

@@ -128,12 +128,26 @@ class Backend:
 
 
     @staticmethod
-    def check_exported_keys_password(file_path: str, password: str) -> bool:
+    async def check_exported_keys_passphrase(file_path: str, passphrase: str,
+                                            ) -> Union[bool, Tuple[str, bool]]:
+        """Check if the exported keys file can be decrypted with passphrase.
+
+        Returns True on success, False is the passphrase is invalid, or
+        an (error_message, error_is_translated) tuple if another error occured.
+        """
+
         try:
-            nio.crypto.key_export.decrypt_and_read(file_path, password)
+            nio.crypto.key_export.decrypt_and_read(file_path, passphrase)
             return True
-        except (FileNotFoundError, ValueError):
-            return False
+
+        except OSError as err:
+            return (f"{file_path}: {err.strerror}", True)
+
+        except ValueError as err:
+            if str(err).startswith("HMAC check failed"):
+                return False
+
+            return (str(err), False)
 
 
     async def load_settings(self) -> tuple:

src/qml/Base/HPasswordPopup.qml

@@ -9,9 +9,14 @@ Popup {
     modal: true
     padding: 0
 
+    onAboutToShow: {
+        acceptedPassword  = ""
+        passwordValid     = null
+        okClicked         = false
+        errorMessage.text = ""
+    }
     onOpened: passwordField.forceActiveFocus()
 
-
     property bool validateWhileTyping: false
 
     property string acceptedPassword: ""
@@ -22,9 +27,11 @@ Popup {
     property alias field: passwordField
 
 
-    function verifyPassword(pass) {
-        // Implement me when using this component
-        return false
+    function verifyPassword(pass, callback) {
+        // Implement this function when using this component.
+        // Return true on success, false on invalid password, or
+        // a [error message, translated] array for any other error.
+        return ["Verification not implemented", false]
     }
 
 
@@ -56,15 +63,20 @@ Popup {
                 okClicked      = true
                 button.loading = true
 
-                if (verifyPassword(password)) {
-                    passwordValid          = true
-                    popup.acceptedPassword = password
-                    popup.close()
-                } else {
-                    passwordValid = false
-                }
+                verifyPassword(password, result => {
+                    if (result === true) {
+                        passwordValid          = true
+                        popup.acceptedPassword = password
+                        popup.close()
+                    } else if (result === false) {
+                        passwordValid = false
+                    } else {
+                        let [msg, translated] = result
+                        errorMessage.text     = translated ? msg : qsTr(msg)
+                    }
 
-                button.loading = false
+                    button.loading = false
+                })
             },
             cancel: button => { popup.close() },
         })
@@ -105,5 +117,17 @@ Popup {
                 Behavior on Layout.preferredWidth { HNumberAnimation {} }
             }
         }
+
+        HLabel {
+            id: errorMessage
+            wrapMode: Text.Wrap
+            color: theme.colors.errorText
+
+            visible: Layout.maximumHeight > 0
+            Layout.maximumHeight: text ? implicitHeight : 0
+            Behavior on Layout.maximumHeight { HNumberAnimation {} }
+
+            Layout.fillWidth: true
+        }
     }
 }

src/qml/Pages/EditAccount/Encryption.qml

@@ -8,10 +8,11 @@ HColumnLayout {
     function importKeys(file, passphrase) {
         importButton.loading = true
 
-        let path = Qt.resolvedUrl(file).replace(/^file:\/\//, "")
+        let path = file.toString().replace(/^file:\/\//, "")
 
         py.callClientCoro(
             editAccount.userId, "import_keys", [path, passphrase], () => {
+                print("import done")
                 importButton.loading = false
             }
         )
@@ -63,9 +64,11 @@ HColumnLayout {
     HPasswordPopup {
         property url file: ""
 
-        function verifyPassword(pass) {
-            return py.callSync(
-                "check_exported_keys_password", [file.toString(), pass]
+        function verifyPassword(pass, callback) {
+            return py.callCoro(
+                "check_exported_keys_passphrase",
+                [file.toString().replace(/^file:\/\//, ""), pass],
+                callback
             )
         }
 
@@ -73,6 +76,6 @@ HColumnLayout {
         label.text: qsTr(
             "Please enter the passphrase that was used to protect this file:"
         )
-        onAcceptedPasswordChanged: importKeys(file, password)
+        onAcceptedPasswordChanged: importKeys(file, acceptedPassword)
     }
 }