AES Encrypt and decrypt from Hex

[andrepcg]

What is wrong with the following piece of code?

var key = '123';
// Encrypt
var ciphertext = CryptoJS.AES.encrypt('my message', key);
var cypherString = ciphertext.toString(CryptoJS.format.Hex)

// Decrypt
var bytes  = CryptoJS.AES.decrypt(cypherString, key, {format: CryptoJS.format.Hex });
var plaintext = bytes.toString();

plaintext is always an empty string when it should output 'my message'

[ifrias-fuze]

I found that you can actually import the enc object and use that to stringify/parse strings.

I am not sure about hex, but to decrypt a Utf8 formatted string I ended up doing:

const plainText = enc.Utf8.stringify(cypherString, key);

Note: This would only work if cypherString = cipherText.toString() -> because by default the encrypt use Utf8 encoding.

[qiudaomao]

@andrepcg

try below, the input value should be an object contains ciphertext
// Decrypt
var bytes = CryptoJS.AES.decrypt({
ciphertext: CryptoJS.enc.Hex.parse(cypherString)
}, key, {format: CryptoJS.format.Hex });
var plaintext = bytes.toString();

[ohager]

@qiudaomao I cannot make this work... any thoughts?

        const ciphertext = CryptoJS.AES.encrypt('my message', key);
        const cypherString = ciphertext.toString(CryptoJS.format.Hex);

        const bytes = CryptoJS.AES.decrypt({
            ciphertext: CryptoJS.enc.Hex.parse(cypherString)
        }, key, {format: CryptoJS.format.Hex});
        const plaintext = bytes.toString();

plaintext remains empty

[qiudaomao]

@qiudaomao I cannot make this work... any thoughts?

        const ciphertext = CryptoJS.AES.encrypt('my message', key);
        const cypherString = ciphertext.toString(CryptoJS.format.Hex);

        const bytes = CryptoJS.AES.decrypt({
            ciphertext: CryptoJS.enc.Hex.parse(cypherString)
        }, key, {format: CryptoJS.format.Hex});
        const plaintext = bytes.toString();

plaintext remains empty

//here returns an encrypted object contains `ciphertext`
//js is really stupid, you never known method input/output types without read the code...
const cipherResult = CryptoJS.AES.encrypt('my message', key);
const cipherString = CryptoJS.enc.Hex.stringify(cipherResult.ciphertext);

const bytes = CryptoJS.AES.decrypt({
    ciphertext: CryptoJS.enc.Hex.parse(cypherString)
},  key,  {format: CryptoJS.format.Hex});
const plaintext = bytes.toString();

[TOPSinfo]

var data = [{id: 1}, {id: 2}]
// Encrypt
var ciphertext = CryptoJS.AES.encrypt(JSON.stringify(data), key);
const cypherString = ciphertext.toString(CryptoJS.format.Hex);
console.log("cipherText here is",cypherString);

var bytes  = CryptoJS.AES.decrypt(ciphertext.toString(), key);
var decryptedData = JSON.parse(bytes.toString(CryptoJS.enc.Utf8));

[Barbery]

I meet the problem too, anyone know how to solve it?

[92sajid110]

no solution yet

[belaarany]

Still no solution...

[yxw007]

var key = CryptoJS.enc.Utf8.parse("4ozcn613nu8irs5x");
        var plaintText = '123'; 
        //encrypt
        var encryptedData = CryptoJS.AES.encrypt(plaintText, key, {
          mode: CryptoJS.mode.ECB,
          padding: CryptoJS.pad.Pkcs7
        });
        console.log("plaintText：" + plaintText);
        console.log("encryptedData ：" + encryptedData);

        var encryptedDataHexStr = encryptedData.toString(CryptoJS.format.Hex);
        console.log("encryptedDataHex：" + encryptedDataHexStr );
        //-------------------------------------------------------------------------
        //decrypt 
        var encryptedHex = CryptoJS.enc.Hex.parse(encryptedDataHexStr);
        var encryptedBase64 = CryptoJS.enc.Base64.stringify(encryptedHex);
        console.log("encryptedHex  ：" + encryptedHex);
        console.log("encryptedBase64  ：" + encryptedBase64 );

        var decryptedData = CryptoJS.AES.decrypt(encryptedBase64, key, {
          mode: CryptoJS.mode.ECB,
          padding: CryptoJS.pad.Pkcs7,
        });

        let decryptText = decryptedData.toString(CryptoJS.enc.Utf8);
        console.log("decryptText ：" + decryptText );

This is my solution, share it with everyone

@aa4790139 bro, do you see that your identifiers are all inconsistent and confusing.

I'm pretty sure encryptedDataHexStr is the same as encryptedDataHex and encryptedHexStr since the latter were never declared. But it's hard to follow like that.

[yxw007]

@aa4790139 bro, do you see that your identifiers are all inconsistent and confusing.

I'm pretty sure encryptedDataHexStr is the same as encryptedDataHex and encryptedHexStr since the latter were never declared. But it's hard to follow like that.

sorry decrypt edit error， already corrected

[92Sam]

This work for me, using enc and not only UTF8

const { AES, enc } = require('crypto-js')
const { decrypt, encrypt } = AES


const message = "Hi my friend"
const key= "key123456"
const aesDecrypt = decrypt(message, key).toString(enc.Utf8)
console.log(aesDecrypt) // Hi my friend

[HereOrCode]

var key = CryptoJS.enc.Utf8.parse("4ozcn613nu8irs5x");
        var plaintText = '123'; 
        //encrypt
        var encryptedData = CryptoJS.AES.encrypt(plaintText, key, {
          mode: CryptoJS.mode.ECB,
          padding: CryptoJS.pad.Pkcs7
        });
        console.log("plaintText：" + plaintText);
        console.log("encryptedData ：" + encryptedData);

        var encryptedDataHexStr = encryptedData.toString(CryptoJS.format.Hex);
        console.log("encryptedDataHex：" + encryptedDataHexStr );
        //-------------------------------------------------------------------------
        //decrypt 
        var encryptedHex = CryptoJS.enc.Hex.parse(encryptedDataHexStr);
        var encryptedBase64 = CryptoJS.enc.Base64.stringify(encryptedHex);
        console.log("encryptedHex  ：" + encryptedHex);
        console.log("encryptedBase64  ：" + encryptedBase64 );

        var decryptedData = CryptoJS.AES.decrypt(encryptedBase64, key, {
          mode: CryptoJS.mode.ECB,
          padding: CryptoJS.pad.Pkcs7,
        });

        let decryptText = decryptedData.toString(CryptoJS.enc.Utf8);
        console.log("decryptText ：" + decryptText );

This is my solution, share it with everyone

Working for me, thanks