Add support for client certificates

client/src/js/components/FileInput.js

@@ -0,0 +1,30 @@
+import React, { Component } from 'react';
+import pure from 'pure-render-decorator';
+
+@pure
+export default class FileInput extends Component {
+  componentWillMount() {
+    this.input = window.document.createElement('input');
+    this.input.setAttribute('type', 'file');
+
+    this.input.addEventListener('change', e => {
+      const file = e.target.files[0];
+      const reader = new FileReader();
+
+      reader.onload = () => {
+        console.log(reader.result.byteLength);
+        this.props.onChange(file.name, reader.result);
+      };
+
+      reader.readAsArrayBuffer(file);
+    });
+  }
+
+  handleClick = () => this.input.click();
+
+  render() {
+    return (
+      <button className="input-file" onClick={this.handleClick}>{this.props.name}</button>
+    );
+  }
+}