I created a pull request for those features: https://github.com/vyos/vyos-1x/pull/238
It is still work in progress, as I was not able to test it (yet).

I am not sure, if I should update here or at github. I did some tests and fixes with my PR. Now generate and show seem to work fine.

Request:

curl -X POST -F key=mykey https://myip/generate --insecure -F data='{"cmd": "wireguard preshared-key"}'

Response:

{"success": true, "data": "wybEjELpQ2CQYFRmTEdVc5PAxFgBCNfHJj/aDWf0qg0=\n", "error": null}

Request:

curl -X POST -F key=mykey https://myip/show --insecure -F data='{"cmd": "wireguard keypairs pubkey default"}'

Response:

{"success": true, "data": "<<censored_but_right_key>>\n", "error": null}

As this wrapper passes arbitrary commands to the op_mode_wrapper, I am not sure about the security implications.

The code is now merged. Can somebody update this task?

@jestabro you removed VyOS 1.2.6 does this mean it will not be included in 1.2.x ?

@adestis The status 'Backport Candidate' indicates the intention to include it in 1.2.x; I may have mistakenly removed the specific project (1.2.6) when I changed the status.

The form will be made consistent with other commands, using an explicit 'op' (show|generate) and 'path' as list of strings. For example:

curl -k -X POST -F data='{"op": "generate", "path": ["wireguard", "default-keypair"]}' -F key=qwerty https://192.168.100.128/generate

respectively

curl -k -X POST -F data='{"op": "show", "path": ["hardware", "cpu", "summary"]}' -F key=qwerty https://192.168.100.128/show