funky-framadate-front/src/app/features/shared/components/ui/static-pages/ciphering/ciphering.component.ts

import { Component, OnInit } from '@angular/core';
// eslint-disable-next-line @typescript-eslint/no-var-requires
const crypto = require('crypto');
// documentation:
// https://medium.com/@spatocode/symmetric-encryption-in-javascript-bcb5fd14c273
// https://nodejs.org/api/crypto.html
@Component({
	selector: 'app-ciphering',
	templateUrl: './ciphering.component.html',
	styleUrls: ['./ciphering.component.scss'],
})
export class CipheringComponent implements OnInit {
	public plainText = 'le texte à chiffrer, coucou !';
	public cipheredText = '';
	algorithm = 'aes-192-cbc';
	public salt = crypto.randomBytes(16);
	public initial_vector = crypto.randomBytes(16);
	public key = '';
	public otherCipheredText: any;

	constructor() {}

	ngOnInit(): void {
		this.encrypt(this.plainText);
	}

	encrypt(someText) {
		this.key = crypto.scryptSync(someText, 'salt', 24);
		this.initial_vector = crypto.randomBytes(16);

		const cipher = crypto.createCipheriv(this.algorithm, this.key, this.initial_vector);

		cipher.on('readable', () => {
			this.cipheredText = cipher.read().toString('hex');
			console.log(cipher.read().toString('hex'));
		});

		let output = '';

		this.cipheredText = someText;
		// outputs encrypted hex
		console.log(this.cipheredText);
	}

	decrypt(sometext) {
		const decipher = crypto.createDecipheriv(this.algorithm, this.key, this.initial_vector);

		decipher.on('readable', () => {
			this.otherCipheredText = decipher.read().toString('utf8');

			console.log('otherCipheredText decrypt', this.otherCipheredText);
		});

		decipher.write(sometext, 'hex');
		decipher.end();
	}

	convertTextToInt(someText) {
		let output = '';

		for (let i = 0; i < someText.length; i++) {
			output += someText[i].charCodeAt(0);
		}
		return output;
	}
}