Added initial ability to login with passkey.

Telegram/Resources/langs/lang.strings

@@ -378,6 +378,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_intro_qr_step2" = "Go to Settings > Devices > Link Desktop Device";
 "lng_intro_qr_step3" = "Scan this image to Log In";
 "lng_intro_qr_skip" = "Or log in using your phone number";
+"lng_intro_qr_phone" = "Log in using phone number";
+"lng_intro_qr_passkey" = "Log in using passkey";
 
 "lng_intro_fragment_title" = "Enter code";
 "lng_intro_fragment_about" = "Get the code for {phone_number} in the Anonymous Numbers section on Fragment.";

Telegram/SourceFiles/intro/intro_qr.cpp

@@ -8,6 +8,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "intro/intro_qr.h"
 
 #include "boxes/abstract_box.h"
+#include "data/components/passkeys.h"
 #include "intro/intro_phone.h"
 #include "intro/intro_widget.h"
 #include "intro/intro_password_check.h"
@@ -27,6 +28,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "core/update_checker.h"
 #include "base/unixtime.h"
 #include "qr/qr_generate.h"
+#include "platform/platform_webauthn.h"
 #include "styles/style_intro.h"
 
 namespace Intro {
@@ -330,17 +332,58 @@ void QrWidget::setupControls() {
 
 	_skip = Ui::CreateChild<Ui::LinkButton>(
 		this,
-		tr::lng_intro_qr_skip(tr::now));
+		tr::lng_intro_qr_phone(tr::now));
+	if (Platform::WebAuthn::IsSupported()) {
+		_passkey = Ui::CreateChild<Ui::LinkButton>(
+			this,
+			tr::lng_intro_qr_passkey(tr::now));
+	}
 	rpl::combine(
 		sizeValue(),
-		_skip->widthValue()
-	) | rpl::start_with_next([=](QSize size, int skipWidth) {
+		_skip->widthValue(),
+		_passkey ? _passkey->widthValue() : rpl::single(0)
+	) | rpl::start_with_next([=](
+			QSize size,
+			int skipWidth,
+			int passkeyWidth) {
 		_skip->moveToLeft(
 			(size.width() - skipWidth) / 2,
 			contentTop() + st::introQrSkipTop);
+		if (_passkey) {
+			_passkey->moveToLeft(
+				(size.width() - passkeyWidth) / 2,
+				contentTop()
+					+ st::introQrSkipTop + 1.5 * st::normalFont->height);
+		}
 	}, _skip->lifetime());
 
 	_skip->setClickedCallback([=] { submit(); });
+	if (_passkey) {
+		_passkey->setClickedCallback([=] {
+		const auto initialDc = api().instance().mainDcId();
+		::Data::InitPasskeyLogin(api(), [=](
+				const ::Data::Passkey::LoginData &loginData) {
+			Platform::WebAuthn::Login(loginData, [=](
+					Platform::WebAuthn::LoginResult result) {
+				if (result.userHandle.isEmpty()) {
+					return;
+				}
+				::Data::FinishPasskeyLogin(
+					api(),
+					initialDc,
+					result,
+					[=](const MTPauth_Authorization &auth) { done(auth); },
+					[=](QString error) {
+						if (error == u"SESSION_PASSWORD_NEEDED"_q) {
+							sendCheckPasswordRequest();
+						} else {
+							showError(rpl::single(error));
+						}
+					});
+				});
+			});
+		});
+	}
 }
 
 void QrWidget::refreshCode() {

Telegram/SourceFiles/intro/intro_qr.h

@@ -54,6 +54,7 @@ private:
 
 	rpl::event_stream<QByteArray> _qrCodes;
 	Ui::LinkButton *_skip = nullptr;
+	Ui::LinkButton *_passkey = nullptr;
 	base::Timer _refreshTimer;
 	mtpRequestId _requestId = 0;
 	bool _forceRefresh = false;