How to create a public RSA certificate?

Question

Encryption

Good day to all. The input is 2 numbers. This is a public exponent from the server and module. All of course in the usual int. How to use them to generate a public server certificate and encrypt a message with it and transfer it to the server accordingly?
Thanks in advance for your reply

Answer 1

Well, if you just want to play around, then just raise your "message", which should be less than the modulo, to the power of the modulo exponent and get the ciphertext. Only encryption, in the case of using a modulus of up to 2^32, will be worse than a simple replacement with int. And you won't be able to pass messages that range from module to int.MaxInt.
There are several open source libraries for working with RSA on node.js. For example, https://github.com/rzcoder/node-rsa