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Mime type and size checks

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This commit is contained in:
Philipp Heckel 2022-05-09 10:23:21 -04:00
parent fc1d59dcce
commit 8f3e242fda
2 changed files with 20 additions and 2 deletions
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20
app/src/main/java/io/heckel/ntfy/ui/DetailSettingsActivity.kt
View file

@ -284,6 +284,16 @@ class DetailSettingsActivity : AppCompatActivity() {
lifecycleScope.launch(Dispatchers.IO) {
val outputUri = createUri() ?: return@launch
try {
// Early size & mime type check
val mimeType = resolver.getType(inputUri)
if (!supportedImage(mimeType)) {
throw IOException("unknown image type or not supported")
}
val stat = fileStat(requireContext(), inputUri) // May throw
if (stat.size > SUBSCRIPTION_ICON_MAX_SIZE_BYTES) {
throw IOException("image too large, max supported is ${SUBSCRIPTION_ICON_MAX_SIZE_BYTES/1024/1024}MB")
}
// Write to cache storage
val inputStream = resolver.openInputStream(inputUri) ?: throw IOException("Couldn't open content URI for reading")
val outputStream = resolver.openOutputStream(outputUri) ?: throw IOException("Couldn't open content URI for writing")
@ -291,8 +301,13 @@ class DetailSettingsActivity : AppCompatActivity() {
it.copyTo(outputStream)
}
// Read image & display "remove" preference
// Read image, check dimensions
val bitmap = outputUri.readBitmapFromUri(requireContext())
if (bitmap.width > SUBSCRIPTION_ICON_MAX_WIDTH || bitmap.height > SUBSCRIPTION_ICON_MAX_HEIGHT) {
throw IOException("image exceeds max dimensions of ${SUBSCRIPTION_ICON_MAX_WIDTH}x${SUBSCRIPTION_ICON_MAX_HEIGHT}")
}
// Display "remove" preference
iconRemovePref.icon = bitmap.toDrawable(resources)
iconRemovePref.isVisible = true
iconSetPref.isVisible = false
@ -351,5 +366,8 @@ class DetailSettingsActivity : AppCompatActivity() {
companion object {
private const val TAG = "NtfyDetailSettingsActiv"
private const val SUBSCRIPTION_ICONS = "subscriptionIcons"
private const val SUBSCRIPTION_ICON_MAX_SIZE_BYTES = 4194304
private const val SUBSCRIPTION_ICON_MAX_WIDTH = 2048
private const val SUBSCRIPTION_ICON_MAX_HEIGHT = 2048
}
}

2
app/src/main/res/values/strings.xml
View file

@ -350,7 +350,7 @@
<string name="detail_settings_appearance_icon_remove_summary">Icon displayed in notifications for this topic</string>
<string name="detail_settings_appearance_icon_error_saving">Unable to save icon: %1$s</string>
<string name="detail_settings_global_setting_title">Use global setting</string>
<string name="detail_settings_global_setting_suffix">global</string>
<string name="detail_settings_global_setting_suffix">using global setting</string>
<!-- User add/edit dialog -->
<string name="user_dialog_title_add">Add user</string>