Check pasted content URI type

app/src/main/java/eu/faircode/email/EditTextCompose.java

@@ -622,7 +622,7 @@ public class EditTextCompose extends FixedEditText {
                 ClipData.Item item = cbm.getPrimaryClip().getItemAt(0);
 
                 Uri uri = item.getUri();
-                if (inputContentListener != null && uri != null) {
+                if (inputContentListener != null && uri != null && "content".equals(uri.getScheme())) {
                     String type = Helper.guessMimeType(uri.getLastPathSegment());
                     inputContentListener.onInputContent(uri, type);
                     return true;
@@ -840,6 +840,9 @@ public class EditTextCompose extends FixedEditText {
                     if (inputContentListener == null)
                         throw new IllegalArgumentException("InputContent listener not set");
 
+                    if (!"content".equals(info.getContentUri().getScheme()))
+                        throw new IllegalArgumentException("Invalid uri=" + info.getContentUri());
+
                     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N_MR1 &&
                             (flags & InputConnectionCompat.INPUT_CONTENT_GRANT_READ_URI_PERMISSION) != 0)
                         info.requestPermission();

app/src/main/java/eu/faircode/email/FragmentCompose.java

@@ -660,7 +660,7 @@ public class FragmentCompose extends FragmentBase {
         etBody.setInputContentListener(new EditTextCompose.IInputContentListener() {
             @Override
             public void onInputContent(Uri uri, String type) {
-                Log.i("Received input uri=" + uri);
+                Log.i("Received input uri=" + uri + " type=" + type);
                 UriType uriType = new UriType(uri, type, null);
                 onSharedAttachments(new ArrayList<>(Arrays.asList(uriType)));
             }