From 53db05a1f67fc974dba904ec158b2d67fa72df95 Mon Sep 17 00:00:00 2001
From: Roeland Jago Douma <roeland@famdouma.nl>
Date: Sun, 9 Feb 2020 20:06:08 +0100
Subject: Start with webauthn

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
Signed-off-by: npmbuildbot[bot] <npmbuildbot[bot]@users.noreply.github.com>
---
 .../settings/src/components/WebAuthn/AddDevice.vue | 215 +++++++++++++++++++++
 1 file changed, 215 insertions(+)
 create mode 100644 apps/settings/src/components/WebAuthn/AddDevice.vue

(limited to 'apps/settings/src/components/WebAuthn/AddDevice.vue')

diff --git a/apps/settings/src/components/WebAuthn/AddDevice.vue b/apps/settings/src/components/WebAuthn/AddDevice.vue
new file mode 100644
index 00000000000..05b649ec313
--- /dev/null
+++ b/apps/settings/src/components/WebAuthn/AddDevice.vue
@@ -0,0 +1,215 @@
+<!--
+  - @copyright 2020, Roeland Jago Douma <roeland@famdouma.nl>
+  -
+  - @author Roeland Jago Douma <roeland@famdouma.nl>
+  -
+  - @license GNU AGPL version 3 or any later version
+  -
+  - This program is free software: you can redistribute it and/or modify
+  - it under the terms of the GNU Affero General Public License as
+  - published by the Free Software Foundation, either version 3 of the
+  - License, or (at your option) any later version.
+  -
+  - This program is distributed in the hope that it will be useful,
+  - but WITHOUT ANY WARRANTY; without even the implied warranty of
+  - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  - GNU Affero General Public License for more details.
+  -
+  - You should have received a copy of the GNU Affero General Public License
+  - along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<template>
+	<div v-if="!isHttps">
+		{{ t('settings', 'Passwordless authentication requires a secure connection.') }}
+	</div>
+	<div v-else>
+		<div v-if="step === RegistrationSteps.READY">
+			<button @click="start">
+				{{ t('settings', 'Add Webauthn device') }}
+			</button>
+		</div>
+
+		<div v-else-if="step === RegistrationSteps.REGISTRATION"
+			class="new-webauthn-device">
+			<span class="icon-loading-small webauthn-loading" />
+			{{ t('settings', 'Please authorize your WebAuthn device.') }}
+		</div>
+
+		<div v-else-if="step === RegistrationSteps.NAMING"
+			class="new-webauthn-device">
+			<span class="icon-loading-small webauthn-loading" />
+			<input v-model="name"
+				type="text"
+				:placeholder="t('settings', 'Name your device')"
+				@:keyup.enter="submit">
+			<button @click="submit">
+				{{ t('settings', 'Add') }}
+			</button>
+		</div>
+
+		<div v-else-if="step === RegistrationSteps.PERSIST"
+			class="new-webauthn-device">
+			<span class="icon-loading-small webauthn-loading" />
+			{{ t('settings', 'Adding your device …') }}
+		</div>
+
+		<div v-else>
+			Invalid registration step. This should not have happened.
+		</div>
+	</div>
+</template>
+
+<script>
+import confirmPassword from '@nextcloud/password-confirmation'
+
+import logger from '../../logger'
+import {
+	startRegistration,
+	finishRegistration,
+} from '../../service/WebAuthnRegistrationSerice'
+
+const logAndPass = (text) => (data) => {
+	logger.debug(text)
+	return data
+}
+
+const RegistrationSteps = Object.freeze({
+	READY: 1,
+	REGISTRATION: 2,
+	NAMING: 3,
+	PERSIST: 4,
+})
+
+export default {
+	name: 'AddDevice',
+	props: {
+		httpWarning: Boolean,
+		isHttps: {
+			type: Boolean,
+			default: false
+		}
+	},
+	data() {
+		return {
+			name: '',
+			credential: {},
+			RegistrationSteps,
+			step: RegistrationSteps.READY,
+		}
+	},
+	methods: {
+		arrayToBase64String(a) {
+			return btoa(String.fromCharCode(...a))
+		},
+		start() {
+			this.step = RegistrationSteps.REGISTRATION
+			console.debug('Starting WebAuthn registration')
+
+			return confirmPassword()
+				.then(this.getRegistrationData)
+				.then(this.register.bind(this))
+				.then(() => { this.step = RegistrationSteps.NAMING })
+				.catch(err => {
+					console.error(err.name, err.message)
+					this.step = RegistrationSteps.READY
+				})
+		},
+
+		getRegistrationData() {
+			console.debug('Fetching webauthn registration data')
+
+			const base64urlDecode = function(input) {
+				// Replace non-url compatible chars with base64 standard chars
+				input = input
+					.replace(/-/g, '+')
+					.replace(/_/g, '/')
+
+				// Pad out with standard base64 required padding characters
+				const pad = input.length % 4
+				if (pad) {
+					if (pad === 1) {
+						throw new Error('InvalidLengthError: Input base64url string is the wrong length to determine padding')
+					}
+					input += new Array(5 - pad).join('=')
+				}
+
+				return window.atob(input)
+			}
+
+			return startRegistration()
+				.then(publicKey => {
+					console.debug(publicKey)
+					publicKey.challenge = Uint8Array.from(base64urlDecode(publicKey.challenge), c => c.charCodeAt(0))
+					publicKey.user.id = Uint8Array.from(publicKey.user.id, c => c.charCodeAt(0))
+					return publicKey
+				})
+				.catch(err => {
+					console.error('Error getting webauthn registration data from server', err)
+					throw new Error(t('settings', 'Server error while trying to add webauthn device'))
+				})
+		},
+
+		register(publicKey) {
+			console.debug('starting webauthn registration')
+
+			return navigator.credentials.create({ publicKey })
+				.then(data => {
+					this.credential = {
+						id: data.id,
+						type: data.type,
+						rawId: this.arrayToBase64String(new Uint8Array(data.rawId)),
+						response: {
+							clientDataJSON: this.arrayToBase64String(new Uint8Array(data.response.clientDataJSON)),
+							attestationObject: this.arrayToBase64String(new Uint8Array(data.response.attestationObject)),
+						},
+					}
+				})
+		},
+
+		submit() {
+			this.step = RegistrationSteps.PERSIST
+
+			return confirmPassword()
+				.then(logAndPass('confirmed password'))
+				.then(this.saveRegistrationData)
+				.then(logAndPass('registration data saved'))
+				.then(() => this.reset())
+				.then(logAndPass('app reset'))
+				.catch(console.error.bind(this))
+		},
+
+		async saveRegistrationData() {
+			try {
+				const device = await finishRegistration(this.name, JSON.stringify(this.credential))
+
+				logger.info('new device added', { device })
+
+				this.$emit('added', device)
+			} catch (err) {
+				logger.error('Error persisting webauthn registration', { error: err })
+				throw new Error(t('settings', 'Server error while trying to complete webauthn device registration'))
+			}
+		},
+
+		reset() {
+			this.name = ''
+			this.registrationData = {}
+			this.step = RegistrationSteps.READY
+		},
+	},
+}
+</script>
+
+<style scoped>
+	.webauthn-loading {
+		display: inline-block;
+		vertical-align: sub;
+		margin-left: 2px;
+		margin-right: 2px;
+	}
+
+	.new-webauthn-device {
+		line-height: 300%;
+	}
+</style>
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