How to Encode nodejs ecdh public key as pem

问题

Unable to sign a file with nodejs crypto

I am trying to verify a signed document created like in this thread using the method verify.verify() with the ECDH public key. Therefore, i guess, i have to format the raw public key into valid PEM.

How would i do that using the ans1.js and bn.js module?

来源：https://stackoverflow.com/questions/50874329/how-to-encode-nodejs-ecdh-public-key-as-pem