clrghouz/public/passkey/passkey.js

228 lines
6.2 KiB
JavaScript
Vendored

/*
* Passkey Implementation
*/
let passkey_debug = false;
/**
* Convert a ArrayBuffer to Base64
* @param {ArrayBuffer} buffer
* @returns {String}
*/
function arrayBufferToBase64(buffer) {
let binary = '';
let bytes = new Uint8Array(buffer);
let len = bytes.byteLength;
for (let i = 0; i < len; i++) {
binary += String.fromCharCode( bytes[ i ] );
}
return window.btoa(binary);
}
/**
* convert RFC 1342-like base64 strings to array buffer
* @param {mixed} obj
* @returns {undefined}
*/
function recursiveBase64StrToArrayBuffer(obj) {
let prefix = '=?BINARY?B?';
let suffix = '?=';
if (typeof obj === 'object') {
for (let key in obj) {
if (typeof obj[key] === 'string') {
let str = obj[key];
if (str.substring(0, prefix.length) === prefix && str.substring(str.length - suffix.length) === suffix) {
str = str.substring(prefix.length, str.length - suffix.length);
let binary_string = window.atob(str);
let len = binary_string.length;
let bytes = new Uint8Array(len);
for (let i = 0; i < len; i++) {
bytes[i] = binary_string.charCodeAt(i);
}
obj[key] = bytes.buffer;
}
} else {
recursiveBase64StrToArrayBuffer(obj[key]);
}
}
}
}
function passkey_check_browser()
{
// check browser support
if ((! window.fetch) || (! navigator.credentials) || (! navigator.credentials.create))
throw new Error('Browser not supported.');
/*
// Availability of `window.PublicKeyCredential` means WebAuthn is usable.
// `isUserVerifyingPlatformAuthenticatorAvailable` means the feature detection is usable.
// `isConditionalMediationAvailable` means the feature detection is usable.
if (window.PublicKeyCredential &&
PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable &&
PublicKeyCredential.isConditionalMediationAvailable) {
// Check if user verifying platform authenticator is available.
Promise.all([
PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable(),
PublicKeyCredential.isConditionalMediationAvailable(),
]).then(results => {
if (results.every(r => r === true)) {
// Display "Create a new passkey" button
}
});
}
*/
if (passkey_debug)
console.log('Passkey: Browser OK');
return true;
}
/**
* Register/Create a passkey for a user
*/
async function passkey_register(csrf_token,icon_dom,icon,icon_shell_success,icon_shell_fail)
{
try {
if (! passkey_check_browser())
return;
// Change our icon so that it is obvious we are doing something
icon_dom.find('i').removeClass(icon).addClass('spinner-grow spinner-grow-sm');
// Get our arguments
var createArgs;
$.ajax({
url: '/passkey/register',
type: 'GET',
dataType: 'json',
async: false,
cache: false,
success: function(data) {
if (passkey_debug)
console.log('Passkey: Get Register Success');
recursiveBase64StrToArrayBuffer(data);
createArgs = data;
},
error: function(e,status,error) {
throw new Error(status || 'Unknown error occurred');
}
});
// Create credentials
try {
const cred = await navigator.credentials.create(createArgs);
const authenticatorAttestationResponse = {
id: cred.id,
rawId: arrayBufferToBase64(cred.rawId),
transports: cred.response.getTransports ? cred.response.getTransports() : null,
clientDataJSON: cred.response.clientDataJSON ? arrayBufferToBase64(cred.response.clientDataJSON) : null,
attestationObject: cred.response.attestationObject ? arrayBufferToBase64(cred.response.attestationObject) : null,
authenticatorAttachment: cred.authenticatorAttachment,
_token: csrf_token,
};
$.ajax({
url: '/passkey/check',
type: 'POST',
data: authenticatorAttestationResponse,
cache: false,
success: function(data) {
if (passkey_debug)
console.log('Passkey: Registration Success');
icon_dom.find('i').addClass(icon).removeClass('spinner-grow spinner-grow-sm');
icon_dom.removeClass('btn-outline-primary').addClass('btn-primary');
},
error: function(e,status,error) {
throw new Error(status || 'Unknown error occurred');
}
});
} catch (status) {
if (passkey_debug)
console.log(status || 'Passkey: User Aborted Register');
// Restore the icon
icon_dom.find('i').addClass(icon).removeClass('spinner-grow spinner-grow-sm');
return;
}
} catch (err) {
window.alert(err || 'An UNKNOWN error occurred?');
}
}
/**
* Check a passkey being presented
*/
async function passkey_check(csrf_token,redirect)
{
if (passkey_debug)
console.log('Passkey: Check User Passkey');
try {
if (! passkey_check_browser())
return;
// Get our arguments
var getArgs;
$.ajax({
url: '/passkey/get',
type: 'GET',
dataType: 'json',
async: false,
cache: false,
success: function(data) {
if (passkey_debug)
console.log('Passkey: Get Args Success');
recursiveBase64StrToArrayBuffer(data);
getArgs = data;
},
error: function(e,status,error) {
throw new Error(status || 'Unknown error occurred');
}
});
// check credentials with hardware
const cred = await navigator.credentials.get(getArgs);
// create object for transmission to server
const authenticatorAttestationResponse = {
id: cred.rawId ? arrayBufferToBase64(cred.rawId) : null,
clientDataJSON: cred.response.clientDataJSON ? arrayBufferToBase64(cred.response.clientDataJSON) : null,
authenticatorData: cred.response.authenticatorData ? arrayBufferToBase64(cred.response.authenticatorData) : null,
signature: cred.response.signature ? arrayBufferToBase64(cred.response.signature) : null,
userHandle: cred.response.userHandle ? arrayBufferToBase64(cred.response.userHandle) : null,
_token: csrf_token
};
$.ajax({
url: '/passkey/process',
type: 'POST',
data: authenticatorAttestationResponse,
cache: false,
success: function(data) {
if (passkey_debug)
console.log('Passkey: Process Success');
// Direct to the home page
if (data.success)
window.location.href = (redirect !== undefined) ? redirect : '/';
else
alert(data.msg || 'Unknown error occurred');
},
error: function(e,status,error) {
throw new Error(status || 'Unknown error occurred');
}
});
} catch (err) {
window.alert(err || 'An UNKNOWN error occurred?');
}
}