MyCrypto/common/containers/Tabs/WalletDecrypt/KeystoreDecrypt/index.jsx

import React, {Component} from 'react';
import translate from 'translations';
import wallet from 'ethereumjs-wallet';
import ethUtil from 'ethereumjs-util';

export default class KeystoreDecrypt extends Component {
    constructor(props) {
        super(props);

        this.handleFileSelection = this.handleFileSelection.bind(this);
    }

    handleFileSelection(event) {
        const fileReader = new FileReader();
        const inputFile = event.target.files[0];

        fileReader.onload = () => {
            try {
                const keyStoreString = fileReader.result;
                const decryptedWallet = wallet.fromV3(keyStoreString, 'asdfasdfasdf', true);
                const privateHex = ethUtil.bufferToHex(decryptedWallet._privKey);
                const publicHex = ethUtil.bufferToHex(ethUtil.privateToAddress(decryptedWallet._privKey));
            } catch (e) {
                console.error('Could not parse Keystore file.', e);
            }
        };

        fileReader.readAsText(inputFile, 'utf-8');
    }

    render() {
        return (
            <section className="col-md-4 col-sm-6">
                <div id="selectedUploadKey">
                    <h4>{translate('ADD_Radio_2_alt')}</h4>

                    <div className="form-group">
                        <input type="file" id="fselector" onChange={this.handleFileSelection} />
                        <label htmlFor="fselector">
                            <a className="btn-file marg-v-sm" id="aria1" tabIndex="0" role="button">{translate('ADD_Radio_2_short')}</a>
                        </label>
                    </div>
                </div>
            </section>
        );
    }
}