Can't use crypto on Ionic

@asac wrote:

Hello guys,

I’m currently developing an Ionic App that needs to use some crypto stuff. I used npm to install some packages like js-crypto-aes , js-crypto-ec, …
I created a folder scritps inside src on which I added all my .ts files that use crypto. When I import the functions from those files to my home.page.ts , the editor (vscode) detects all the functions and everything goes well. When i run the scripts with ts-node or tsc, it all goes well.
However, when i start the server I can’t use my crypto functions, because Ionic can’t use the packages properly. It gives me errors like: Error: FailedBothNativeAndPureJSEnvs: UnsupportedJWKType.

Can anyone here help me, please ?
Here is a part of the code:

import hkdf from 'js-crypto-hkdf';
import ec from 'js-crypto-ec';
import keyutil from 'js-crypto-key-utils';
import aes from 'js-crypto-aes';
import hmac from 'js-crypto-hmac';
import {WebApi,Oidc,TransferMethods,NfcOptions,BleOptions,WifiOptions,Security,SessionData, SessionEstablishment} from './deviceEngagement';
import {KeyTypes, KeyCrv, HeaderParameters} from './cose_parameters';
import { encryptEc } from './jscu/packages/js-crypto-utils/dist/pkcec';

async function encrypt_msg(msg,publicKey, iv, salt, { privateKey, hash, encrypt='AES-GCM', keyLength=32, info=''}) {
    hash = 'SHA-256'
    const sharedSecret = await ec.deriveSecret(publicKey, privateKey);
    const hkdfOutput = await hkdf.compute(sharedSecret, hash, keyLength, info, salt); // use HKDF for key derivation
    const aad = new TextEncoder().encode('');
    const aditional_data = await hmac.compute(sharedSecret, aad, hash); // authenticate message

    let data;
    if(encrypt =='AES-GCM') {
        data = await aes.encrypt(msg, hkdfOutput.key, {name: encrypt, iv, additionalData: aditional_data, tagLength: 16}); // no specification of tagLength and additionalData
        return {data, salt: hkdfOutput.salt, iv};
    }
};

The error occurs when I call the encrypt_msg function, and it brokes on the first line it calls the library: const sharedSecret = await ec.deriveSecret(publicKey, privateKey);

Again, when I run the script with ts-node there is no problems.

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