PKI.js | pure JavaScript library implementing the formats | TLS library

tldr:

Is there a way to create CMS Enveloped Data when i have already encrypted content with AES and secret key which is already encrypted with public key?

Long version:

I have an application which encrypts and decrypts data with AES (CBC and GCM mode). Symetric key is encrypted/decrypted with RSA key pairs. When user requests for data we decrypt it in backend (Java) and send it to the browser

Usually we have public key and private key but there is requirement that in some cases we dont have private key and the decryption should take place in browser (user provides PFX with privatkey). The solution for this is PKI.js which can decrypt data using PFX and CMS Enveloped Data.

The problem is that we already encrypted the data and dont have access to plain data which we can use to build CMS Enveloped Data.

Edit: @dave_thompson_085 thank you for reply! I have an follow-up question. I dont hold certificates in system so only thing i have is public key. Is there a way to adjust your code to this requirement?

Before your answer i was encrypting data for second time just for CMS Enveloped Object. In this code i used only public key for generating reciepents. Is there a way to adjust your code to generate reciepent with public key only? My previous code: