CustomData serialization breaks KeepassXC

[1fexd]

It appears creating a database and saving it breaks KeepassXC which errors with the following error message: Error while reading the database: Missing custom data key or value

After some troubleshooting, and tracking down the relevant KeepassXC line, the issue seems to be that Jackson serializes the database and includes an empty <Item>:

<CustomData>
  <Item/>
</CustomData>

[jorabin]

Hi

Can you please say which version of KeePassJava2 you are using?

Also, you are saying that you create a database in KeePassJava2 and save it, before trying to load in KeePassXC?

thanks

[1fexd]

I'm using 2.2.3 - yes I'm creating a database using KeePassJava2, which opens fine in regular KeePass, but KeepassXC fails.
Managed to disable this by setting JacksonSerializationDatabase using

mapper.disable(SerializationFeature.WRITE_EMPTY_JSON_ARRAYS);

not sure if this is desirable

[jorabin]

Thanks for the confirmation.

The problem is related to CustomData being serialised with an empty item within Meta. CustomData in Group or Entry doesn't have this problem.

I have a fix that does very similar to what you have tried, only it removes all empty elements:

        mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);

which I have pushed to develop and also 2.2.4-SNAPSHOT release.

Cheers

[jorabin]

If you can confirm this solves the problem then we can close.

[1fexd]

Yes, it works now - thanks!