function register() {
	fetch(url_prefix + '/api/register/begin', {
		method: 'POST',
	}).then(function(response) {
		if(!response.ok) { throw new Error('Error getting registration data!'); }
		return response.arrayBuffer();
	}).then(CBOR.decode).then(function(options) {
		return navigator.credentials.create(options);
	}).then(function(attestation) {
		return fetch(url_prefix + '/api/register/complete', {
			method: 'POST',
			headers: {'Content-Type': 'application/cbor'},
			body: CBOR.encode({
				"attestationObject": new Uint8Array(attestation.response.attestationObject),
				"clientDataJSON": new Uint8Array(attestation.response.clientDataJSON),
				"security_key_nick": document.querySelector('#security_key_nick').value,
			})
		});
	}).then(function(response) {
		return response.json();
	}).then(function(json) {
		console.log(json);
		if (!json.ok) { throw new Error('HTTP error, status = ' + json.status + ', message = ' + json.message); }
		window.location = url_prefix + '/login';
	});
}

function login() {
	fetch(url_prefix + '/api/authenticate/begin', {
		method: 'POST',
		headers: {'Content-Type': 'application/cbor'},
		body: CBOR.encode({
			"username": document.querySelector('#username').value,
		})
	}).then(function(response) {
		if(!response.ok) { throw new Error('Error getting registration data!'); }
		return response.arrayBuffer();
	}).then(CBOR.decode).then(function(options) {
		return navigator.credentials.get(options);
	}).then(function(assertion) {
		return fetch(url_prefix + '/api/authenticate/complete', {
			method: 'POST',
			headers: {'Content-Type': 'application/cbor'},
			body: CBOR.encode({
				"credentialId": new Uint8Array(assertion.rawId),
				"authenticatorData": new Uint8Array(assertion.response.authenticatorData),
				"clientDataJSON": new Uint8Array(assertion.response.clientDataJSON),
				"signature": new Uint8Array(assertion.response.signature)
			})
		});
	}, function(reason) {
		console.log('navigator.credentials.get() failed for the following reason: ' + reason);
	}).then(function(response) {
		return response.json();
	}).then(function(json) {
		console.log(json);
		if (!json.ok) { throw new Error('HTTP error, status = ' + json.status + ', message = ' + json.message); }
		window.location = url_prefix + '/';
	});
}