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This is a cheat sheet for how to perform various actions to ZSH, which can be tricky to find on the web as the syntax is not intuitive and it is generally not very well-documented.
Description | Syntax |
---|---|
Get the length of a string | ${#VARNAME} |
Get a single character | ${VARNAME[index]} |
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const buffer = require('buffer'); | |
const crypto = require('crypto'); | |
// Demo implementation of using `aes-256-gcm` with node.js's `crypto` lib. | |
const aes256gcm = (key) => { | |
const ALGO = 'aes-256-gcm'; | |
// encrypt returns base64-encoded ciphertext | |
const encrypt = (str) => { | |
// The `iv` for a given key must be globally unique to prevent |
[ Update 2020-05-31: I won't be maintaining this page or responding to comments anymore (except for perhaps a few exceptional occasions). ]
Most of the terminal emulators auto-detect when a URL appears onscreen and allow to conveniently open them (e.g. via Ctrl+click or Cmd+click, or the right click menu).
It was, however, not possible until now for arbitrary text to point to URLs, just as on webpages.
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/** | |
* Encrypts plaintext using AES-GCM with supplied password, for decryption with aesGcmDecrypt(). | |
* (c) Chris Veness MIT Licence | |
* | |
* @param {String} plaintext - Plaintext to be encrypted. | |
* @param {String} password - Password to use to encrypt plaintext. | |
* @returns {String} Encrypted ciphertext. | |
* | |
* @example | |
* const ciphertext = await aesGcmEncrypt('my secret text', 'pw'); |
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'use strict'; | |
const crypto = require('crypto'); | |
const ENCRYPTION_KEY = process.env.ENCRYPTION_KEY; // Must be 256 bits (32 characters) | |
const IV_LENGTH = 16; // For AES, this is always 16 | |
function encrypt(text) { | |
let iv = crypto.randomBytes(IV_LENGTH); | |
let cipher = crypto.createCipheriv('aes-256-cbc', Buffer.from(ENCRYPTION_KEY), iv); |
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