From 4fab21c88de3b7f20635773686cf4d5befeb20bf Mon Sep 17 00:00:00 2001
From: Markus Fisch <mf@markusfisch.de>
Date: Sun, 31 May 2026 21:46:56 +0200
Subject: [PATCH] Support fido:/ URIs

Recognize spec-style fido:/ URIs and open them with ACTION_VIEW.

Note that FIDO:// URIs already worked before this just fine.
---
 .../binaryeye/actions/ActionRegistry.kt       |  2 +
 .../binaryeye/actions/fido/FidoAction.kt      | 23 ++++++++++++
 .../binaryeye/preference/Preferences.kt       |  2 +-
 app/src/main/res/values-ar/strings.xml        |  2 +-
 app/src/main/res/values-bg/strings.xml        |  2 +-
 app/src/main/res/values-bn/strings.xml        |  2 +-
 app/src/main/res/values-cs/strings.xml        |  2 +-
 app/src/main/res/values-da/strings.xml        |  2 +-
 app/src/main/res/values-de/strings.xml        |  2 +-
 app/src/main/res/values-es/strings.xml        |  2 +-
 app/src/main/res/values-fa/strings.xml        |  2 +-
 app/src/main/res/values-fr/strings.xml        |  2 +-
 app/src/main/res/values-hu/strings.xml        |  2 +-
 app/src/main/res/values-in/strings.xml        |  2 +-
 app/src/main/res/values-it/strings.xml        |  2 +-
 app/src/main/res/values-ja/strings.xml        |  2 +-
 app/src/main/res/values-ka/strings.xml        |  2 +-
 app/src/main/res/values-ko/strings.xml        |  2 +-
 app/src/main/res/values-lv/strings.xml        |  2 +-
 app/src/main/res/values-nl/strings.xml        |  2 +-
 app/src/main/res/values-pl/strings.xml        |  2 +-
 app/src/main/res/values-pt-rBR/strings.xml    |  2 +-
 app/src/main/res/values-ru-rRU/strings.xml    |  2 +-
 app/src/main/res/values-tr/strings.xml        |  2 +-
 app/src/main/res/values-uk/strings.xml        |  2 +-
 app/src/main/res/values-vi/strings.xml        |  2 +-
 app/src/main/res/values-zh-rCN/strings.xml    |  2 +-
 app/src/main/res/values-zh-rTW/strings.xml    |  2 +-
 app/src/main/res/values/strings.xml           |  2 +-
 .../binaryeye/actions/fido/FidoTest.kt        | 37 +++++++++++++++++++
 30 files changed, 89 insertions(+), 27 deletions(-)
 create mode 100644 app/src/main/kotlin/de/markusfisch/android/binaryeye/actions/fido/FidoAction.kt
 create mode 100644 app/src/test/kotlin/de/markusfisch/android/binaryeye/actions/fido/FidoTest.kt

diff --git a/app/src/main/kotlin/de/markusfisch/android/binaryeye/actions/ActionRegistry.kt b/app/src/main/kotlin/de/markusfisch/android/binaryeye/actions/ActionRegistry.kt
index 0484302c..9bdd63b4 100644
--- a/app/src/main/kotlin/de/markusfisch/android/binaryeye/actions/ActionRegistry.kt
+++ b/app/src/main/kotlin/de/markusfisch/android/binaryeye/actions/ActionRegistry.kt
@@ -1,5 +1,6 @@
 package de.markusfisch.android.binaryeye.actions
 
+import de.markusfisch.android.binaryeye.actions.fido.FidoAction
 import de.markusfisch.android.binaryeye.actions.mail.MailAction
 import de.markusfisch.android.binaryeye.actions.mail.MatMsgAction
 import de.markusfisch.android.binaryeye.actions.otpauth.OtpauthAction
@@ -17,6 +18,7 @@ object ActionRegistry {
 	private val REGISTRY: Set<Action> = setOf(
 		MailAction,
 		MatMsgAction,
+		FidoAction,
 		OtpauthAction,
 		SmsAction,
 		TelAction,
diff --git a/app/src/main/kotlin/de/markusfisch/android/binaryeye/actions/fido/FidoAction.kt b/app/src/main/kotlin/de/markusfisch/android/binaryeye/actions/fido/FidoAction.kt
new file mode 100644
index 00000000..832534e7
--- /dev/null
+++ b/app/src/main/kotlin/de/markusfisch/android/binaryeye/actions/fido/FidoAction.kt
@@ -0,0 +1,23 @@
+package de.markusfisch.android.binaryeye.actions.fido
+
+import android.content.Context
+import de.markusfisch.android.binaryeye.R
+import de.markusfisch.android.binaryeye.actions.Action
+import de.markusfisch.android.binaryeye.content.openUrl
+
+object FidoAction : Action() {
+	private val fidoUriRegex = "^fido:/[0-9]+$".toRegex(
+		RegexOption.IGNORE_CASE
+	)
+
+	override val iconResId: Int = R.drawable.ic_action_open
+	override val titleResId: Int = R.string.open_url
+
+	override fun canExecuteOn(data: ByteArray): Boolean {
+		return String(data).trim().matches(fidoUriRegex)
+	}
+
+	override suspend fun execute(context: Context, data: ByteArray) {
+		executed = context.openUrl(String(data).trim())
+	}
+}
diff --git a/app/src/main/kotlin/de/markusfisch/android/binaryeye/preference/Preferences.kt b/app/src/main/kotlin/de/markusfisch/android/binaryeye/preference/Preferences.kt
index cb7a1ef0..1e60ea2d 100644
--- a/app/src/main/kotlin/de/markusfisch/android/binaryeye/preference/Preferences.kt
+++ b/app/src/main/kotlin/de/markusfisch/android/binaryeye/preference/Preferences.kt
@@ -924,7 +924,7 @@ class Preferences {
 		private const val PREVIEW_SCALE = "preview_scale"
 		private const val AUTOMATED_ACTIONS = "automated_actions"
 		private const val DYNAMIC_COLORS = "dynamic_colors"
-		private const val DEFAULT_IGNORE_CODE_PATTERN = "^FIDO://.*"
+		private const val DEFAULT_IGNORE_CODE_PATTERN = "(?i)^fido:/.*"
 	}
 }
 
diff --git a/app/src/main/res/values-ar/strings.xml b/app/src/main/res/values-ar/strings.xml
index 41d68400..99e560d3 100644
--- a/app/src/main/res/values-ar/strings.xml
+++ b/app/src/main/res/values-ar/strings.xml
@@ -144,7 +144,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-bg/strings.xml b/app/src/main/res/values-bg/strings.xml
index f382358b..bb5bd9cf 100644
--- a/app/src/main/res/values-bg/strings.xml
+++ b/app/src/main/res/values-bg/strings.xml
@@ -136,7 +136,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-bn/strings.xml b/app/src/main/res/values-bn/strings.xml
index a78f1f90..96acf930 100644
--- a/app/src/main/res/values-bn/strings.xml
+++ b/app/src/main/res/values-bn/strings.xml
@@ -136,7 +136,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-cs/strings.xml b/app/src/main/res/values-cs/strings.xml
index 0e342a03..5065f308 100644
--- a/app/src/main/res/values-cs/strings.xml
+++ b/app/src/main/res/values-cs/strings.xml
@@ -140,7 +140,7 @@
 	</plurals>
 	<string name="ignore_code_add">Přidat kód</string>
 	<string name="ignore_code_edit">Upravit kód</string>
-	<string name="ignore_code_regex_hint">např. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">např. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Vyžadován regulární výraz</string>
 	<string name="ignore_code_regex_invalid">Neplatný regulární výraz</string>
 	<string name="ignore_code_remove_confirm">Odstranit tento ignorovaný kód?</string>
diff --git a/app/src/main/res/values-da/strings.xml b/app/src/main/res/values-da/strings.xml
index c5f325b8..4040360f 100644
--- a/app/src/main/res/values-da/strings.xml
+++ b/app/src/main/res/values-da/strings.xml
@@ -136,7 +136,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 4e919ae6..1f3c760b 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -136,7 +136,7 @@
 	</plurals>
 	<string name="ignore_code_add">Code hinzufügen</string>
 	<string name="ignore_code_edit">Code bearbeiten</string>
-	<string name="ignore_code_regex_hint">z.B. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">z.B. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex erforderlich</string>
 	<string name="ignore_code_regex_invalid">Ungültiger Regex</string>
 	<string name="ignore_code_remove_confirm">Diesen ignorierten Code entfernen?</string>
diff --git a/app/src/main/res/values-es/strings.xml b/app/src/main/res/values-es/strings.xml
index a02060af..9dd45e18 100644
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@@ -137,7 +137,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-fa/strings.xml b/app/src/main/res/values-fa/strings.xml
index a9807dce..b262611e 100644
--- a/app/src/main/res/values-fa/strings.xml
+++ b/app/src/main/res/values-fa/strings.xml
@@ -136,7 +136,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index be4ec4ac..17fa56dd 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -137,7 +137,7 @@
 	</plurals>
 	<string name="ignore_code_add">Ajouter un code</string>
 	<string name="ignore_code_edit">Modifier le code</string>
-	<string name="ignore_code_regex_hint">p. ex. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">p. ex. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Expression régulière requise</string>
 	<string name="ignore_code_regex_invalid">Expression régulière invalide</string>
 	<string name="ignore_code_remove_confirm">Supprimer ce code ignoré ?</string>
diff --git a/app/src/main/res/values-hu/strings.xml b/app/src/main/res/values-hu/strings.xml
index b2c5a3ce..ec228038 100644
--- a/app/src/main/res/values-hu/strings.xml
+++ b/app/src/main/res/values-hu/strings.xml
@@ -136,7 +136,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-in/strings.xml b/app/src/main/res/values-in/strings.xml
index d1664aea..c0518876 100644
--- a/app/src/main/res/values-in/strings.xml
+++ b/app/src/main/res/values-in/strings.xml
@@ -135,7 +135,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-it/strings.xml b/app/src/main/res/values-it/strings.xml
index 0bb53ec7..4be3f65b 100644
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@@ -144,7 +144,7 @@
 	</plurals>
 	<string name="ignore_code_add">Aggiungi codice</string>
 	<string name="ignore_code_edit">Modifica codice</string>
-	<string name="ignore_code_regex_hint">es. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">es. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Richeisto regex</string>
 	<string name="ignore_code_regex_invalid">Regex non valido</string>
 	<string name="ignore_code_remove_confirm">Vuoi rimuovere questo codice ignorato?</string>
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index f6892500..7dada76b 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -135,7 +135,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-ka/strings.xml b/app/src/main/res/values-ka/strings.xml
index 29d8733d..21693d51 100644
--- a/app/src/main/res/values-ka/strings.xml
+++ b/app/src/main/res/values-ka/strings.xml
@@ -136,7 +136,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-ko/strings.xml b/app/src/main/res/values-ko/strings.xml
index 8a627b95..8ab67c61 100644
--- a/app/src/main/res/values-ko/strings.xml
+++ b/app/src/main/res/values-ko/strings.xml
@@ -135,7 +135,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-lv/strings.xml b/app/src/main/res/values-lv/strings.xml
index b43675e6..6d3b019d 100644
--- a/app/src/main/res/values-lv/strings.xml
+++ b/app/src/main/res/values-lv/strings.xml
@@ -38,7 +38,7 @@
 	<string name="profile_current">Pašreizējais profils</string>
 	<string name="current_profile">Profils: %s</string>
 	<string name="barcode_formats">Svītrkoda formāti</string>
-	<string name="ignore_code_regex_hint">piem. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">piem. (?i)^fido:/.*</string>
 	<string name="open_immediately">Nekavējoties atvērt saturu</string>
 	<string name="show_meta_data">Rādīt metadatus</string>
 	<string name="show_checksum">Rādīt kontrolsummu</string>
diff --git a/app/src/main/res/values-nl/strings.xml b/app/src/main/res/values-nl/strings.xml
index 5f8d309f..a1787752 100644
--- a/app/src/main/res/values-nl/strings.xml
+++ b/app/src/main/res/values-nl/strings.xml
@@ -136,7 +136,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index 00c6125b..bd498fc4 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -170,7 +170,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-pt-rBR/strings.xml b/app/src/main/res/values-pt-rBR/strings.xml
index 98079ce9..a5fb279d 100644
--- a/app/src/main/res/values-pt-rBR/strings.xml
+++ b/app/src/main/res/values-pt-rBR/strings.xml
@@ -136,7 +136,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-ru-rRU/strings.xml b/app/src/main/res/values-ru-rRU/strings.xml
index 450b204b..56eeb496 100644
--- a/app/src/main/res/values-ru-rRU/strings.xml
+++ b/app/src/main/res/values-ru-rRU/strings.xml
@@ -140,7 +140,7 @@
 	</plurals>
 	<string name="ignore_code_add">Добавить код</string>
 	<string name="ignore_code_edit">Изменить код</string>
-	<string name="ignore_code_regex_hint">например ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">например (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Требуется регулярное выражение</string>
 	<string name="ignore_code_regex_invalid">Недействительное регулярное выражение</string>
 	<string name="ignore_code_remove_confirm">Удалить этот игнорируемый код?</string>
diff --git a/app/src/main/res/values-tr/strings.xml b/app/src/main/res/values-tr/strings.xml
index e2dcc23e..9f203fa9 100644
--- a/app/src/main/res/values-tr/strings.xml
+++ b/app/src/main/res/values-tr/strings.xml
@@ -136,7 +136,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-uk/strings.xml b/app/src/main/res/values-uk/strings.xml
index d6860e67..ef83b091 100644
--- a/app/src/main/res/values-uk/strings.xml
+++ b/app/src/main/res/values-uk/strings.xml
@@ -140,7 +140,7 @@
 	</plurals>
 	<string name="ignore_code_add">Додати код</string>
 	<string name="ignore_code_edit">Редагувати код</string>
-	<string name="ignore_code_regex_hint">наприклад ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">наприклад (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Потрібен регулярний вираз</string>
 	<string name="ignore_code_regex_invalid">Недійсний регулярний вираз</string>
 	<string name="ignore_code_remove_confirm">Видалити цей проігнорований код?</string>
diff --git a/app/src/main/res/values-vi/strings.xml b/app/src/main/res/values-vi/strings.xml
index ba4396e8..0b579d93 100644
--- a/app/src/main/res/values-vi/strings.xml
+++ b/app/src/main/res/values-vi/strings.xml
@@ -135,7 +135,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 06f37bd5..c4360270 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -135,7 +135,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index cb81ce72..ed471389 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -135,7 +135,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 885a78ae..09c4cf24 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -144,7 +144,7 @@
 	</plurals>
 	<string name="ignore_code_add">Add code</string>
 	<string name="ignore_code_edit">Edit code</string>
-	<string name="ignore_code_regex_hint">e.g. ^FIDO://.*</string>
+	<string name="ignore_code_regex_hint">e.g. (?i)^fido:/.*</string>
 	<string name="ignore_code_regex_required">Regex required</string>
 	<string name="ignore_code_regex_invalid">Invalid regex</string>
 	<string name="ignore_code_remove_confirm">Remove this ignored code?</string>
diff --git a/app/src/test/kotlin/de/markusfisch/android/binaryeye/actions/fido/FidoTest.kt b/app/src/test/kotlin/de/markusfisch/android/binaryeye/actions/fido/FidoTest.kt
new file mode 100644
index 00000000..01b13385
--- /dev/null
+++ b/app/src/test/kotlin/de/markusfisch/android/binaryeye/actions/fido/FidoTest.kt
@@ -0,0 +1,37 @@
+package de.markusfisch.android.binaryeye.actions.fido
+
+import junit.framework.TestCase.assertEquals
+import org.junit.Test
+
+class FidoTest {
+	@Test
+	fun correct() {
+		val urls = listOf(
+			"fido:/1234567890",
+			"FIDO:/1234567890",
+		)
+		for (url in urls) {
+			assertEquals(url, resolve(url))
+		}
+	}
+
+	@Test
+	fun incorrect() {
+		val urls = listOf(
+			"",
+			"fido:",
+			"fido:/",
+			"fido://1234567890",
+			"fido:/abc",
+			"fido:/123abc",
+			"https://example.com",
+		)
+		for (url in urls) {
+			assertEquals(null, resolve(url))
+		}
+	}
+}
+
+private fun resolve(s: String) = if (
+	FidoAction.canExecuteOn(s.toByteArray())
+) s else null