Log SSL errors, give common solutions

gui/MainWindow.cpp

@@ -865,6 +865,8 @@ void MainWindow::doLaunch()
 	if (!account.get())
 		return;
 
+	QString failReason = tr("Your account is currently not logged in. Please enter "
+							"your password to log in again.");
 	// do the login. if the account has an access token, try to refresh it first.
 	if (account->accountStatus() != NotVerified)
 	{
@@ -879,14 +881,29 @@ void MainWindow::doLaunch()
 		{
 			updateInstance(m_selectedInstance, account);
 		}
-		// revert from online to verified.
-		account->downgrade();
-		return;
+		else
+		{
+			if (!task->successful())
+			{
+				failReason = task->failReason();
 			}
-	if (loginWithPassword(account, tr("Your account is currently not logged in. Please enter "
-									  "your password to log in again.")))
+			if (loginWithPassword(account, failReason))
 				updateInstance(m_selectedInstance, account);
 		}
+		// in any case, revert from online to verified.
+		account->downgrade();
+	}
+	else
+	{
+		if (loginWithPassword(account, failReason))
+		{
+			updateInstance(m_selectedInstance, account);
+			account->downgrade();
+		}
+		// in any case, revert from online to verified.
+		account->downgrade();
+	}
+}
 
 bool MainWindow::loginWithPassword(MojangAccountPtr account, const QString &errorMsg)
 {

gui/dialogs/EditAccountDialog.cpp

@@ -15,6 +15,8 @@
 
 #include "EditAccountDialog.h"
 #include "ui_EditAccountDialog.h"
+#include <QDesktopServices>
+#include <QUrl>
 
 EditAccountDialog::EditAccountDialog(const QString &text, QWidget *parent, int flags)
 	: QDialog(parent), ui(new Ui::EditAccountDialog)
@@ -33,6 +35,11 @@ EditAccountDialog::~EditAccountDialog()
 	delete ui;
 }
 
+void EditAccountDialog::on_label_linkActivated(const QString &link)
+{
+	QDesktopServices::openUrl(QUrl(link));
+}
+
 QString EditAccountDialog::username() const
 {
 	return ui->userTextBox->text();

gui/dialogs/EditAccountDialog.h

@@ -52,6 +52,9 @@ public:
 		PasswordField,
 	};
 
+private slots:
+  void on_label_linkActivated(const QString &link);
+
 private:
 	Ui::EditAccountDialog *ui;
 };

gui/dialogs/EditAccountDialog.ui

@@ -19,6 +19,12 @@
      <property name="text">
       <string>Message label placeholder.</string>
      </property>
+     <property name="textFormat">
+      <enum>Qt::RichText</enum>
+     </property>
+     <property name="textInteractionFlags">
+      <set>Qt::LinksAccessibleByKeyboard|Qt::LinksAccessibleByMouse|Qt::TextBrowserInteraction|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+     </property>
     </widget>
    </item>
    <item>

logic/auth/YggdrasilTask.cpp

@@ -48,6 +48,7 @@ void YggdrasilTask::executeTask()
 	connect(m_netReply, &QNetworkReply::finished, this, &YggdrasilTask::processReply);
 	connect(m_netReply, &QNetworkReply::uploadProgress, this, &YggdrasilTask::refreshTimers);
 	connect(m_netReply, &QNetworkReply::downloadProgress, this, &YggdrasilTask::refreshTimers);
+	connect(m_netReply, &QNetworkReply::sslErrors, this, &YggdrasilTask::sslErrors);
 	timeout_keeper.setSingleShot(true);
 	timeout_keeper.start(timeout_max);
 	counter.setSingleShot(false);
@@ -75,10 +76,33 @@ void YggdrasilTask::abort()
 	m_netReply->abort();
 }
 
+void YggdrasilTask::sslErrors(QList<QSslError> errors)
+{
+	int i = 1;
+	for(auto error: errors)
+	{
+		QLOG_ERROR() << "LOGIN SSL Error #" << i << " : " << error.errorString();
+		auto cert = error.certificate();
+		QLOG_ERROR() << "Certificate in question:\n" << cert.toText();
+		i++;
+	}
+}
+
 void YggdrasilTask::processReply()
 {
 	setStatus(getStateMessage(STATE_PROCESSING_RESPONSE));
 
+	if (m_netReply->error() == QNetworkReply::SslHandshakeFailedError)
+	{
+		emitFailed(tr("<b>SSL Handshake failed.</b><br/>There might be a few causes for it:<br/>"
+					  "<ul>"
+					  "<li>You use Windows XP and need to <a href=\"http://www.microsoft.com/en-us/download/details.aspx?id=38918\">update your root certificates</a></li>"
+					  "<li>Some device on your network is interfering with SSL traffic. In that case, you have bigger worries than Minecraft not starting.</li>"
+					  "<li>Possibly something else. Check the MultiMC log file for details</li>"
+					  "</ul>"));
+		return;
+	}
+
 	// any network errors lead to offline mode right now
 	if (m_netReply->error() >= QNetworkReply::ConnectionRefusedError &&
 		m_netReply->error() <= QNetworkReply::UnknownNetworkError)

logic/auth/YggdrasilTask.h

@@ -20,6 +20,7 @@
 #include <QString>
 #include <QJsonObject>
 #include <QTimer>
+#include <qsslerror.h>
 
 #include "logic/auth/MojangAccount.h"
 
@@ -99,6 +100,7 @@ slots:
 	void processReply();
 	void refreshTimers(qint64, qint64);
 	void heartbeat();
+	void sslErrors(QList<QSslError>);
 
 public
 slots: