--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/3rdparty/vmime/examples/example6_authenticator.hpp	Tue Aug 17 11:19:54 2021 +0200
@@ -0,0 +1,106 @@
+
+
+#if VMIME_HAVE_SASL_SUPPORT
+
+// SASL authentication handler
+class interactiveAuthenticator : public vmime::security::sasl::defaultSASLAuthenticator
+{
+	const std::vector <vmime::shared_ptr <vmime::security::sasl::SASLMechanism> > getAcceptableMechanisms
+		(const std::vector <vmime::shared_ptr <vmime::security::sasl::SASLMechanism> >& available,
+		 vmime::shared_ptr <vmime::security::sasl::SASLMechanism> suggested) const
+	{
+		std::cout << std::endl << "Available SASL mechanisms:" << std::endl;
+
+		for (unsigned int i = 0 ; i < available.size() ; ++i)
+		{
+			std::cout << "  " << available[i]->getName();
+
+			if (suggested && available[i]->getName() == suggested->getName())
+				std::cout << "(suggested)";
+		}
+
+		std::cout << std::endl << std::endl;
+
+		return defaultSASLAuthenticator::getAcceptableMechanisms(available, suggested);
+	}
+
+	void setSASLMechanism(vmime::shared_ptr <vmime::security::sasl::SASLMechanism> mech)
+	{
+		std::cout << "Trying '" << mech->getName() << "' authentication mechanism" << std::endl;
+
+		defaultSASLAuthenticator::setSASLMechanism(mech);
+	}
+
+	const vmime::string getUsername() const
+	{
+		if (m_username.empty())
+			m_username = getUserInput("Username");
+
+		return m_username;
+	}
+
+	const vmime::string getPassword() const
+	{
+		if (m_password.empty())
+			m_password = getUserInput("Password");
+
+		return m_password;
+	}
+
+	static const vmime::string getUserInput(const std::string& prompt)
+	{
+		std::cout << prompt << ": ";
+		std::cout.flush();
+
+		vmime::string res;
+		std::getline(std::cin, res);
+
+		return res;
+	}
+
+private:
+
+	mutable vmime::string m_username;
+	mutable vmime::string m_password;
+};
+
+#else // !VMIME_HAVE_SASL_SUPPORT
+
+// Simple authentication handler
+class interactiveAuthenticator : public vmime::security::defaultAuthenticator
+{
+	const vmime::string getUsername() const
+	{
+		if (m_username.empty())
+			m_username = getUserInput("Username");
+
+		return m_username;
+	}
+
+	const vmime::string getPassword() const
+	{
+		if (m_password.empty())
+			m_password = getUserInput("Password");
+
+		return m_password;
+	}
+
+	static const vmime::string getUserInput(const std::string& prompt)
+	{
+		std::cout << prompt << ": ";
+		std::cout.flush();
+
+		vmime::string res;
+		std::getline(std::cin, res);
+
+		return res;
+	}
+
+private:
+
+	mutable vmime::string m_username;
+	mutable vmime::string m_password;
+};
+
+#endif // VMIME_HAVE_SASL_SUPPORT
+