workaround for boost 1.53 TLS 1.2

Author: iamthebot

client_https.hpp

@@ -13,7 +13,9 @@ namespace SimpleWeb {
         Client(const std::string& server_port_path, bool verify_certificate=true, 
                 const std::string& cert_file=std::string(), const std::string& private_key_file=std::string(), 
                 const std::string& verify_file=std::string()) : 
-                ClientBase<HTTPS>::ClientBase(server_port_path, 443), context(boost::asio::ssl::context::tlsv12) {
+                ClientBase<HTTPS>::ClientBase(server_port_path, 443), context(boost::asio::ssl::context::sslv23) {
+            long disallow_ssl_flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_TLSv1 | SSL_OP_NO_TLSv1_1; 
+            context.set_options(boost::asio::ssl::context::default_workarounds | boost::asio::ssl::context::no_sslv2 | disallow_ssl_flags);
             if(cert_file.size()>0 && private_key_file.size()>0) {
                 context.use_certificate_chain_file(cert_file);
                 context.use_private_key_file(private_key_file, boost::asio::ssl::context::pem);

server_https.hpp

@@ -25,9 +25,11 @@ namespace SimpleWeb {
         }
 
         Server(const std::string& cert_file, const std::string& private_key_file, const std::string& verify_file=std::string()):
-                ServerBase<HTTPS>::ServerBase(443), context(boost::asio::ssl::context::tlsv12) {
+                ServerBase<HTTPS>::ServerBase(443), context(boost::asio::ssl::context::sslv23) {
+            long disallow_ssl_flags = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_TLSv1 | SSL_OP_NO_TLSv1_1;
             context.use_certificate_chain_file(cert_file);
             context.use_private_key_file(private_key_file, boost::asio::ssl::context::pem);
+            context.set_options(boost::asio::ssl::context::default_workarounds | boost::asio::ssl::context::no_sslv2 | disallow_ssl_flags);
 
             if(verify_file.size()>0) {
                 context.load_verify_file(verify_file);