Basic Node.js crypto cipher/decipher example.

encrypt-decrypt.js

var crypto = require('crypto')
  , key = 'salt_from_the_user_document'
  , plaintext = 'password'
  , cipher = crypto.createCipher('aes-256-cbc', key)
  , decipher = crypto.createDecipher('aes-256-cbc', key);
  
cipher.update(plaintext, 'utf8', 'base64');
var encryptedPassword = cipher.final('base64')

decipher.update(encryptedPassword, 'base64', 'utf8');
var decryptedPassword = decipher.final('utf8');

console.log('encrypted :', encryptedPassword);
console.log('decrypted :', decryptedPassword);

http://www.levigross.com/2014/03/30/how-to-write-an-encrypt-and-decrypt-api-for-data-at-rest-in-nodejs/

TypeError: error:0606506D:digital envelope routines:EVP_DecryptFinal_ex:wrong final block length

Note: This error appears when the Decrypt function receives other string different to the encrypted string 😄 👊
Source: It just occurred to me

@dkhonig Agree.