encrypt-stack/EncryptionStack.js

An encryption driver/stack to create a multi-layer encrypted workflow in Node.

'use strict';
const EncryptionDriver = require("./EncryptionDriver.js");

class EncryptionStack{
	constructor(stack_size = 3, method, key_sync){
		this.drivers = [];
		
		for(let i=0; i<stack_size; i++){
			this.drivers.push(new EncryptionDriver(method, key_sync));
		}
	}
	
	keys(){
		return this.drivers.map(d=>d.public_key);
	}
	
	computeSecret(keys){
		for(let i=0; i<this.drivers.length; i++){
			this.drivers[i].computeSecret(keys[i]);
		}
	}
	
	encrypt(data){
		let encrypted = data;
		for(let i=0; i<this.drivers.length; i++){
			encrypted = this.drivers[i].encrypt(encrypted);
		}
		
		return encrypted;
	}
	
	decrypt(data){
		let decrypted = data;
		for(let i=0; i<this.drivers.length; i++){
			decrypted = this.drivers[this.drivers.length-i-1].decrypt(decrypted);
		}
		
		return decrypted;
	}
	
	hash(data){
		let hash = "";
		
		this.drivers.forEach(d=>{
			hash = d.hash(hash);
		});
		
		return hash;
	}
}

module.exports = EncryptionStack;