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PhabricatorSMSAuthFactor.php
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Thu, May 9, 01:40

PhabricatorSMSAuthFactor.php
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<?php
final class PhabricatorSMSAuthFactor
extends PhabricatorAuthFactor {
public function getFactorKey() {
return 'sms';
}
public function getFactorName() {
return pht('Text Message (SMS)');
}
public function getFactorShortName() {
return pht('SMS');
}
public function getFactorCreateHelp() {
return pht(
'Allow users to receive a code via SMS.');
}
public function getFactorDescription() {
return pht(
'When you need to authenticate, a text message with a code will '.
'be sent to your phone.');
}
public function getFactorOrder() {
// Sort this factor toward the end of the list because SMS is relatively
// weak.
return 2000;
}
public function isContactNumberFactor() {
return true;
}
public function canCreateNewProvider() {
return $this->isSMSMailerConfigured();
}
public function getProviderCreateDescription() {
$messages = array();
if (!$this->isSMSMailerConfigured()) {
$messages[] = id(new PHUIInfoView())
->setErrors(
array(
pht(
'You have not configured an outbound SMS mailer. You must '.
'configure one before you can set up SMS. See: %s',
phutil_tag(
'a',
array(
'href' => '/config/edit/cluster.mailers/',
),
'cluster.mailers')),
));
}
$messages[] = id(new PHUIInfoView())
->setSeverity(PHUIInfoView::SEVERITY_WARNING)
->setErrors(
array(
pht(
'SMS is weak, and relatively easy for attackers to compromise. '.
'Strongly consider using a different MFA provider.'),
));
return $messages;
}
public function canCreateNewConfiguration(
PhabricatorAuthFactorProvider $provider,
PhabricatorUser $user) {
if (!$this->loadUserContactNumber($user)) {
return false;
}
if ($this->loadConfigurationsForProvider($provider, $user)) {
return false;
}
return true;
}
public function getConfigurationCreateDescription(
PhabricatorAuthFactorProvider $provider,
PhabricatorUser $user) {
$messages = array();
if (!$this->loadUserContactNumber($user)) {
$messages[] = id(new PHUIInfoView())
->setSeverity(PHUIInfoView::SEVERITY_WARNING)
->setErrors(
array(
pht(
'You have not configured a primary contact number. Configure '.
'a contact number before adding SMS as an authentication '.
'factor.'),
));
}
if ($this->loadConfigurationsForProvider($provider, $user)) {
$messages[] = id(new PHUIInfoView())
->setSeverity(PHUIInfoView::SEVERITY_WARNING)
->setErrors(
array(
pht(
'You already have SMS authentication attached to your account.'),
));
}
return $messages;
}
public function getEnrollDescription(
PhabricatorAuthFactorProvider $provider,
PhabricatorUser $user) {
return pht(
'To verify your phone as an authentication factor, a text message with '.
'a secret code will be sent to the phone number you have listed as '.
'your primary contact number.');
}
public function getEnrollButtonText(
PhabricatorAuthFactorProvider $provider,
PhabricatorUser $user) {
$contact_number = $this->loadUserContactNumber($user);
return pht('Send SMS: %s', $contact_number->getDisplayName());
}
public function processAddFactorForm(
PhabricatorAuthFactorProvider $provider,
AphrontFormView $form,
AphrontRequest $request,
PhabricatorUser $user) {
$token = $this->loadMFASyncToken($provider, $request, $form, $user);
$code = $request->getStr('sms.code');
$e_code = true;
if (!$token->getIsNewTemporaryToken()) {
$expect_code = $token->getTemporaryTokenProperty('code');
$okay = phutil_hashes_are_identical(
$this->normalizeSMSCode($code),
$this->normalizeSMSCode($expect_code));
if ($okay) {
$config = $this->newConfigForUser($user)
->setFactorName(pht('SMS'));
return $config;
} else {
if (!strlen($code)) {
$e_code = pht('Required');
} else {
$e_code = pht('Invalid');
}
}
}
$form->appendRemarkupInstructions(
pht(
'Enter the code from the text message which was sent to your '.
'primary contact number.'));
$form->appendChild(
id(new PHUIFormNumberControl())
->setLabel(pht('SMS Code'))
->setName('sms.code')
->setValue($code)
->setError($e_code));
}
protected function newIssuedChallenges(
PhabricatorAuthFactorConfig $config,
PhabricatorUser $viewer,
array $challenges) {
// If we already issued a valid challenge for this workflow and session,
// don't issue a new one.
$challenge = $this->getChallengeForCurrentContext(
$config,
$viewer,
$challenges);
if ($challenge) {
return array();
}
if (!$this->loadUserContactNumber($viewer)) {
return $this->newResult()
->setIsError(true)
->setErrorMessage(
pht(
'Your account has no primary contact number.'));
}
if (!$this->isSMSMailerConfigured()) {
return $this->newResult()
->setIsError(true)
->setErrorMessage(
pht(
'No outbound mailer which can deliver SMS messages is '.
'configured.'));
}
if (!$this->hasCSRF($config)) {
return $this->newResult()
->setIsContinue(true)
->setErrorMessage(
pht(
'A text message with an authorization code will be sent to your '.
'primary contact number.'));
}
// Otherwise, issue a new challenge.
$challenge_code = $this->newSMSChallengeCode();
$envelope = new PhutilOpaqueEnvelope($challenge_code);
$this->sendSMSCodeToUser($envelope, $viewer);
$ttl_seconds = phutil_units('15 minutes in seconds');
return array(
$this->newChallenge($config, $viewer)
->setChallengeKey($challenge_code)
->setChallengeTTL(PhabricatorTime::getNow() + $ttl_seconds),
);
}
protected function newResultFromIssuedChallenges(
PhabricatorAuthFactorConfig $config,
PhabricatorUser $viewer,
array $challenges) {
$challenge = $this->getChallengeForCurrentContext(
$config,
$viewer,
$challenges);
if ($challenge->getIsAnsweredChallenge()) {
return $this->newResult()
->setAnsweredChallenge($challenge);
}
return null;
}
public function renderValidateFactorForm(
PhabricatorAuthFactorConfig $config,
AphrontFormView $form,
PhabricatorUser $viewer,
PhabricatorAuthFactorResult $result) {
$control = $this->newAutomaticControl($result);
if (!$control) {
$value = $result->getValue();
$error = $result->getErrorMessage();
$name = $this->getChallengeResponseParameterName($config);
$control = id(new PHUIFormNumberControl())
->setName($name)
->setDisableAutocomplete(true)
->setValue($value)
->setError($error);
}
$control
->setLabel(pht('SMS Code'))
->setCaption(pht('Factor Name: %s', $config->getFactorName()));
$form->appendChild($control);
}
public function getRequestHasChallengeResponse(
PhabricatorAuthFactorConfig $config,
AphrontRequest $request) {
$value = $this->getChallengeResponseFromRequest($config, $request);
return (bool)strlen($value);
}
protected function newResultFromChallengeResponse(
PhabricatorAuthFactorConfig $config,
PhabricatorUser $viewer,
AphrontRequest $request,
array $challenges) {
$challenge = $this->getChallengeForCurrentContext(
$config,
$viewer,
$challenges);
$code = $this->getChallengeResponseFromRequest(
$config,
$request);
$result = $this->newResult()
->setValue($code);
if ($challenge->getIsAnsweredChallenge()) {
return $result->setAnsweredChallenge($challenge);
}
if (phutil_hashes_are_identical($code, $challenge->getChallengeKey())) {
$ttl = PhabricatorTime::getNow() + phutil_units('15 minutes in seconds');
$challenge
->markChallengeAsAnswered($ttl);
return $result->setAnsweredChallenge($challenge);
}
if (strlen($code)) {
$error_message = pht('Invalid');
} else {
$error_message = pht('Required');
}
$result->setErrorMessage($error_message);
return $result;
}
private function newSMSChallengeCode() {
$value = Filesystem::readRandomInteger(0, 99999999);
$value = sprintf('%08d', $value);
return $value;
}
private function isSMSMailerConfigured() {
$mailers = PhabricatorMetaMTAMail::newMailers(
array(
'outbound' => true,
'media' => array(
PhabricatorMailSMSMessage::MESSAGETYPE,
),
));
return (bool)$mailers;
}
private function loadUserContactNumber(PhabricatorUser $user) {
$contact_numbers = id(new PhabricatorAuthContactNumberQuery())
->setViewer($user)
->withObjectPHIDs(array($user->getPHID()))
->withStatuses(
array(
PhabricatorAuthContactNumber::STATUS_ACTIVE,
))
->withIsPrimary(true)
->execute();
if (count($contact_numbers) !== 1) {
return null;
}
return head($contact_numbers);
}
protected function newMFASyncTokenProperties(
PhabricatorAuthFactorProvider $providerr,
PhabricatorUser $user) {
$sms_code = $this->newSMSChallengeCode();
$envelope = new PhutilOpaqueEnvelope($sms_code);
$this->sendSMSCodeToUser($envelope, $user);
return array(
'code' => $sms_code,
);
}
private function sendSMSCodeToUser(
PhutilOpaqueEnvelope $envelope,
PhabricatorUser $user) {
return id(new PhabricatorMetaMTAMail())
->setMessageType(PhabricatorMailSMSMessage::MESSAGETYPE)
->addTos(array($user->getPHID()))
->setForceDelivery(true)
->setSensitiveContent(true)
->setBody(
pht(
'Phabricator (%s) MFA Code: %s',
$this->getInstallDisplayName(),
$envelope->openEnvelope()))
->save();
}
private function normalizeSMSCode($code) {
return trim($code);
}
}

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