This PR adds masking to remote sources so the passwords are not leaked to the browser. The logic works the same as for TargetURL, where the sensitive fields are replaced by a password placeholder before being transmitted via the endpoints.
When data returns, the masking is removed by looking at the original source and the unmasked value is then encrypted before being stored in the database.
Since the sources is an array and not just a single field, the logic here uses the mount point as a "key" for figuring out which new sources map to the original sources. This is robust in the face of re-ordering, deletions and additions.
If there is just a single remote source (assumed most common) this will match even if the prefix does not, making it possible to change the prefix in this case.
For multi-remote sources, it is not possible to change the prefix without also re-typing all masked properties.
If there is a need later, we could extend the matching to look for how many unique protocols are there, and maybe servers as well to try to match better when the prefixes have been renamed.
There is a guard right before saving a source that rejects it if the source contains the placeholder so we ensure that even faulty logic cannot persist an invalid connection string.
Kenneth Skovhede
e009a0f3ec