NodeJS: createCipheriv should give same output like earlier createCipher - node.js

Question

Currently, I am using an old version of the crypto.js to encrypt and decrypt the strings. Below is my code for encryption -
const encrypt = (password, algorithm, encMethod) => (value) => {
const cipher = crypto.createCipher(algorithm, password);
return cipher.update(JSON.stringify(value), 'utf8', encMethod)
+ cipher.final(encMethod);
};
Using the above code my string (E-mailID) p1#yopmail.com is converted to 29c68f3bad0068c44122e734367f64557112e058c8222e3fd3908e68402ce6d5
Now as createCipher is deprecated what should I do with createCipheriv to give the same output as above.
I tried to pass null as IV to function createCipheriv, but I got the error Missing IV for cipher aes-256-cbc-hmac-sha1

Answer 1

Yes, Finally I resolved the same using some hacks as below -
const bytesToKey = require('evp_bytestokey');
const encryptionToken = bytesToKey(SomePasswordString, null, 256, 16);
//Ciphering
const cipher = crypto.createCipheriv('aes-256-cbc-hmac-sha1', encryptionToken.key, encryptionToken.iv);
return cipher.update(JSON.stringify(##VALUEtoENCRYPT##), 'utf8', 'hex') + cipher.final('hex');
//De-Ciphering
const decipher = crypto.createDecipheriv('aes-256-cbc-hmac-sha1', encryptionToken.key, encryptionToken.iv);
return JSON.parse(decipher.update(##VALUEtoDECRYPT##, 'hex', 'utf8') + decipher.final('utf8'));
Thanks to #topaco for suggesting me to use NPM package evp_bytestokey

Answer 2

Not sure if this is the right / good way to do it, we can use the same key and iv to return the same encrypted and decrypted values each time. And if you do not have a key and iv in mind, you can try using 0 filled buffers as key and iv.
var crypto = require('crypto');
var algo = 'aes-256-ctr';
var key = Buffer.alloc(32);
key.fill(0);
var iv = Buffer.alloc(16);
iv.fill(0);
const encrypt = (text) => {
var cipher = crypto.createCipheriv(algo, key, iv);
var crypted = cipher.update(text, 'utf8', 'base64');
crypted += cipher.final('base64');
return crypted
};
const decrypt = (text) => {
var decipher = crypto.createDecipheriv(algo, key, iv);
var crypted = decipher.update(text, 'base64', 'utf8');
crypted += decipher.final('utf8');
return crypted;
};
var encrypted = encrypt('yourpassword');
console.log(encrypted); //pfq1CtIh+vraJ9Bw
var decrypted = decrypt('pfq1CtIh+vraJ9Bw');
console.log(decrypted); //yourpassword