Tech Rescue

Node.JS

Copy-Paste-Run-Ready string encryption / decryption with AES-256 in Node.JS

Copy-Paste-Run-Ready string encryption / decryption with AES-256 in Node.JS

/* --- Code ready to copy -> paste -> run --- */ // Libraries const crypto = require('crypto'); const ENCODING = "hex"; // hex or base64 // Implementations function encryptAES256(clearMsg, key) { let iv = crypto.randomBytes(16); // Generating 16 byte random IV let cipher = crypto.createCipheriv( "aes256", crypto.createHash("sha256").update(key, "utf8").digest(), // 32 bytes

Shortest and simplest string encryption / decryption with AES-256 in Node.JS

Shortest and simplest string encryption / decryption with AES-256 in Node.JS

Copy and paste the following code in a .js file, then run it. // Libraries const crypto = require('crypto'); // Constants const OUTPUT_FORMAT = "hex"; const ALGORITHM = "aes256"; const KEY = "012345ABCDEFGHIJKLMNOPQRSTUVWXYZ"; const IV = "ABCDEF0123456789"; // Implementations function encrypt(message) { let cipher = crypto.createCipheriv( ALGORITHM, Buffer.from(KEY), Buffer.from(IV) ); return (Buffer.concat(

SCRYPT demo in Node.JS v15

SCRYPT is yet another password-based key derivation function that allows you to tweak its arguments in order to discourage brute-force attacks. Basically you can adjust the options to make it slower, and therefore brute-force attacks will need more time to be performed. Here is an example of how to use

Password Based Key Derivation Function 2 (PBKDF2) demo in Node.JS v15

Password Based Key Derivation Function 2 (PBKDF2) demo in Node.JS v15

A quick demo on how to use Password Based Key Derivation Function 2 (PBKDF2) to generate keys and IVs to use with all different ciphers available in Node.JS v15.x. const crypto = require('crypto'); const PASSWORD = "My_Secret_Password"; // Could be the password/key used to encrypt a message

Encrypt / Decrypt with AES (CCM & GCM) in Node.JS (Part 2 – Concatenate the Authentication Tag)

In the past I wrote a post about encrypting and decrypting text strings with AES in GCM and CCM mode. At the time, the demo was written to show how the algorithm works in those modes. Today I needed to handle the inclusion of such Authentication Tag inside the encrypted

Node.JS Ciphers Info in version 15.x

After the deprecation of methods createCipher(…) and createDecipher(…) due to the introduction of createCipheriv(…) and createDecipheriv(…) a lot of us had issues when specifying the keys and IVs because sometimes the key would be the incorrect size and same for the IVs. I developed a kind of brute force tester

Encrypt / Decrypt strings with RSA in Node.JS

Interesting things that go through my mind during lock-down haha! const crypto = require('crypto'); const PASSPHRASE = 'I had learned that some things are best kept secret.'; const KEY_PAIR_OPTIONS = { modulusLength: 2048, publicKeyEncoding: { type: 'spki', format: 'pem' }, privateKeyEncoding: { type: 'pkcs8', format: 'pem', cipher: 'aes-256-cbc', passphrase: PASSPHRASE } }; const KEY_PAIR