how to encrypt/decrypt with crypto-js

Question

I'm using crypto-js library:

I want to encrypt some value and decrypt them.

but it returns wrong output.

my codes:

import CryptoAES from 'crypto-js/aes'

componentDidMount(){
  var ciphertext = CryptoAES.encrypt('my message', 'secret key 123');
  var _ciphertext = CryptoAES.decrypt(ciphertext, 'secret key 123');
  console.log(_ciphertext.toString(CryptoAES.Utf8));
}

but my console doesn't return my message. it returns like this:

6d79206d657373616765

I got this error message : cannot read property 'Utf8' of undefined — S.M_Emamian
– S.M_Emamian, Commented Apr 1, 2018 at 20:35

Santosh Singh · Accepted Answer · 2019-09-23 13:48:29Z

7

import CryptoAES from 'crypto-js/aes';
import CryptoENC from 'crypto-js/enc-utf8';

var ciphertext = CryptoAES.encrypt('my message', 'secret key 123');
var _ciphertext = CryptoAES.decrypt(ciphertext.toString(), 'secret key 123');
console.log(_ciphertext.toString(CryptoENC));

answered Sep 23, 2019 at 13:48

Santosh Singh

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Comments

Afshin · Accepted Answer · 2018-04-01 20:28:52Z

3

I have never used this library, but a small check shows your result is your input's ASCII code as hex string.

0x6d=m
...
0x65=e

6d|79|20|6d|65|73|73|61|67|65
m |y |  |m |e |s |s |a |g |e

So this code is working correctly. Probably that _ciphertext.toString() mess everything up. You need to check how to use _ciphertext correctly.

edited Apr 1, 2018 at 20:28

answered Apr 1, 2018 at 20:23

Afshin

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Comments

Aaqib · Accepted Answer · 2018-04-01 21:11:17Z

2

Currently you are getting a hexa string 6d79206d657373616765 as you can check on this convertor when you enter my message it will return you 6d79206d657373616765

As used in the crypto-js Documentation

You need to make use of .toString() inside your decrypt method as currently you are getting hex for your my message and you need to convert that back to string, So you need to change this :

var _ciphertext = CryptoAES.decrypt(ciphertext, 'secret key 123');

To

var _ciphertext = CryptoAES.decrypt(ciphertext.toString(), 'secret key 123');

It will be like :

import CryptoAES from 'crypto-js/aes'

componentDidMount(){
  var ciphertext = CryptoAES.encrypt('my message', 'secret key 123');
  var _ciphertext = CryptoAES.decrypt(ciphertext.toString(), 'secret key 123');
  console.log(_ciphertext.toString(CryptoAES.Utf8));
}

edited Apr 1, 2018 at 21:11

answered Apr 1, 2018 at 20:43

Aaqib

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1 Comment

lazuardi_fenjano Over a year ago

this is the answer, because without .toString the result should be object type not string

Tolga AYKURT · Accepted Answer · 2019-07-28 13:13:28Z

-1

You can use this. cippertext use output algorytms.

ciphertext.toString("base64")

or

ciphertext.toString("hex")

answered Jul 28, 2019 at 13:13

Tolga AYKURT

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