epee: add SSL support

RPC connections now have optional tranparent SSL.

An optional private key and certificate file can be passed,
using the --{rpc,daemon}-ssl-private-key and
--{rpc,daemon}-ssl-certificate options. Those have as
argument a path to a PEM format private private key and
certificate, respectively.
If not given, a temporary self signed certificate will be used.

SSL can be enabled or disabled using --{rpc}-ssl, which
accepts autodetect (default), disabled or enabled.

Access can be restricted to particular certificates using the
--rpc-ssl-allowed-certificates, which takes a list of
paths to PEM encoded certificates. This can allow a wallet to
connect to only the daemon they think they're connected to,
by forcing SSL and listing the paths to the known good
certificates.

To generate long term certificates:

openssl genrsa -out /tmp/KEY 4096
openssl req -new -key /tmp/KEY -out /tmp/REQ
openssl x509 -req -days 999999 -sha256 -in /tmp/REQ -signkey /tmp/KEY -out /tmp/CERT

/tmp/KEY is the private key, and /tmp/CERT is the certificate,
both in PEM format. /tmp/REQ can be removed. Adjust the last
command to set expiration date, etc, as needed. It doesn't
make a whole lot of sense for monero anyway, since most servers
will run with one time temporary self signed certificates anyway.

SSL support is transparent, so all communication is done on the
existing ports, with SSL autodetection. This means you can start
using an SSL daemon now, but you should not enforce SSL yet or
nothing will talk to you.

14 files changed, 168 insertions, 30 deletions

diff --git a/src/common/download.cpp b/src/common/download.cpp
index 58ce0595f..7c38cfa5b 100644
--- a/src/common/download.cpp
+++ b/src/common/download.cpp
@@ -179,8 +179,8 @@ namespace tools
 
       lock.unlock();
 
-      bool ssl = u_c.schema == "https";
-      uint16_t port = u_c.port ? u_c.port : ssl ? 443 : 80;
+      epee::net_utils::ssl_support_t ssl = u_c.schema == "https" ? epee::net_utils::ssl_support_t::e_ssl_support_enabled : epee::net_utils::ssl_support_t::e_ssl_support_disabled;
+      uint16_t port = u_c.port ? u_c.port : ssl == epee::net_utils::ssl_support_t::e_ssl_support_enabled ? 443 : 80;
       MDEBUG("Connecting to " << u_c.host << ":" << port);
       client.set_server(u_c.host, std::to_string(port), boost::none, ssl);
       if (!client.connect(std::chrono::seconds(30)))
diff --git a/src/cryptonote_protocol/cryptonote_protocol_defs.h b/src/cryptonote_protocol/cryptonote_protocol_defs.h
index c49371d48..2d5d10d67 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_defs.h
+++ b/src/cryptonote_protocol/cryptonote_protocol_defs.h
@@ -48,6 +48,7 @@ namespace cryptonote
     bool incoming;
     bool localhost;
     bool local_ip;
+    bool ssl;
 
     std::string address;
     std::string host;
diff --git a/src/cryptonote_protocol/cryptonote_protocol_handler.inl b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
index c1459cbb6..018ef4ab2 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_handler.inl
+++ b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
@@ -268,6 +268,7 @@ namespace cryptonote
       cnx.current_upload = cntxt.m_current_speed_up / 1024;
 
       cnx.connection_id = epee::string_tools::pod_to_hex(cntxt.m_connection_id);
+      cnx.ssl = cntxt.m_ssl;
 
       cnx.height = cntxt.m_remote_blockchain_height;
       cnx.pruning_seed = cntxt.m_pruning_seed;
diff --git a/src/daemon/rpc_command_executor.cpp b/src/daemon/rpc_command_executor.cpp
index 839350522..feb8dd40b 100644
--- a/src/daemon/rpc_command_executor.cpp
+++ b/src/daemon/rpc_command_executor.cpp
@@ -510,6 +510,7 @@ bool t_rpc_command_executor::print_connections() {
   }
 
   tools::msg_writer() << std::setw(30) << std::left << "Remote Host"
+      << std::setw(6) << "SSL"
       << std::setw(20) << "Peer id"
       << std::setw(20) << "Support Flags"      
       << std::setw(30) << "Recv/Sent (inactive,sec)"
@@ -529,6 +530,7 @@ bool t_rpc_command_executor::print_connections() {
     tools::msg_writer() 
      //<< std::setw(30) << std::left << in_out
      << std::setw(30) << std::left << address
+     << std::setw(6) << (info.ssl ? "yes" : "no")
      << std::setw(20) << epee::string_tools::pad_string(info.peer_id, 16, '0', true)
      << std::setw(20) << info.support_flags
      << std::setw(30) << std::to_string(info.recv_count) + "("  + std::to_string(info.recv_idle_time) + ")/" + std::to_string(info.send_count) + "(" + std::to_string(info.send_idle_time) + ")"
diff --git a/src/device_trezor/trezor/transport.hpp b/src/device_trezor/trezor/transport.hpp
index 50c31cf73..1cf0daa85 100644
--- a/src/device_trezor/trezor/transport.hpp
+++ b/src/device_trezor/trezor/transport.hpp
@@ -162,7 +162,7 @@ namespace trezor {
         m_session(boost::none),
         m_device_info(boost::none)
     {
-      m_http_client.set_server(m_bridge_host, boost::none, false);
+      m_http_client.set_server(m_bridge_host, boost::none, epee::net_utils::ssl_support_t::e_ssl_support_disabled);
     }
 
     virtual ~BridgeTransport() = default;
diff --git a/src/p2p/net_node.h b/src/p2p/net_node.h
index 112f30fb6..58e3c8857 100644
--- a/src/p2p/net_node.h
+++ b/src/p2p/net_node.h
@@ -129,7 +129,7 @@ namespace nodetool
     typedef epee::net_utils::boosted_tcp_server<epee::levin::async_protocol_handler<p2p_connection_context>> net_server;
 
     struct network_zone;
-    using connect_func = boost::optional<p2p_connection_context>(network_zone&, epee::net_utils::network_address const&);
+    using connect_func = boost::optional<p2p_connection_context>(network_zone&, epee::net_utils::network_address const&, epee::net_utils::ssl_support_t);
 
     struct config
     {
@@ -437,8 +437,8 @@ namespace nodetool
     //keep connections to initiate some interactions
 
 
-    static boost::optional<p2p_connection_context> public_connect(network_zone&, epee::net_utils::network_address const&);
-    static boost::optional<p2p_connection_context> socks_connect(network_zone&, epee::net_utils::network_address const&);
+    static boost::optional<p2p_connection_context> public_connect(network_zone&, epee::net_utils::network_address const&, epee::net_utils::ssl_support_t);
+    static boost::optional<p2p_connection_context> socks_connect(network_zone&, epee::net_utils::network_address const&, epee::net_utils::ssl_support_t);
 
 
     /* A `std::map` provides constant iterators and key/value pointers even with
@@ -463,6 +463,8 @@ namespace nodetool
 
     boost::uuids::uuid m_network_id;
     cryptonote::network_type m_nettype;
+
+    epee::net_utils::ssl_support_t m_ssl_support;
   };
 
     const int64_t default_limit_up = P2P_DEFAULT_LIMIT_RATE_UP;      // kB/s
diff --git a/src/p2p/net_node.inl b/src/p2p/net_node.inl
index 471fdda0d..e3d804086 100644
--- a/src/p2p/net_node.inl
+++ b/src/p2p/net_node.inl
@@ -650,6 +650,7 @@ namespace nodetool
       return res;
 
     //try to bind
+    m_ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_disabled;
     for (auto& zone : m_network_zones)
     {
       zone.second.m_net_server.get_config_object().set_handler(this);
@@ -659,7 +660,7 @@ namespace nodetool
       {
         zone.second.m_net_server.set_connection_filter(this);
         MINFO("Binding on " << zone.second.m_bind_ip << ":" << zone.second.m_port);
-        res = zone.second.m_net_server.init_server(zone.second.m_port, zone.second.m_bind_ip);
+        res = zone.second.m_net_server.init_server(zone.second.m_port, zone.second.m_bind_ip, epee::net_utils::ssl_support_t::e_ssl_support_disabled);
         CHECK_AND_ASSERT_MES(res, false, "Failed to bind server");
       }
     }
@@ -1057,7 +1058,7 @@ namespace nodetool
         << (last_seen_stamp ? epee::misc_utils::get_time_interval_string(time(NULL) - last_seen_stamp):"never")
         << ")...");
 
-    auto con = zone.m_connect(zone, na);
+    auto con = zone.m_connect(zone, na, m_ssl_support);
     if(!con)
     {
       bool is_priority = is_priority_node(na);
@@ -1119,7 +1120,7 @@ namespace nodetool
                                   << (last_seen_stamp ? epee::misc_utils::get_time_interval_string(time(NULL) - last_seen_stamp):"never")
                                   << ")...");
 
-    auto con = zone.m_connect(zone, na);
+    auto con = zone.m_connect(zone, na, m_ssl_support);
     if (!con) {
       bool is_priority = is_priority_node(na);
 
@@ -2456,13 +2457,13 @@ namespace nodetool
 
   template<typename t_payload_net_handler>
   boost::optional<p2p_connection_context_t<typename t_payload_net_handler::connection_context>>
-  node_server<t_payload_net_handler>::socks_connect(network_zone& zone, const epee::net_utils::network_address& remote)
+  node_server<t_payload_net_handler>::socks_connect(network_zone& zone, const epee::net_utils::network_address& remote, epee::net_utils::ssl_support_t ssl_support)
   {
     auto result = socks_connect_internal(zone.m_net_server.get_stop_signal(), zone.m_net_server.get_io_service(), zone.m_proxy_address, remote);
     if (result) // if no error
     {
       p2p_connection_context context{};
-      if (zone.m_net_server.add_connection(context, std::move(*result), remote))
+      if (zone.m_net_server.add_connection(context, std::move(*result), remote, ssl_support))
         return {std::move(context)};
     }
     return boost::none;
@@ -2470,7 +2471,7 @@ namespace nodetool
 
   template<typename t_payload_net_handler>
   boost::optional<p2p_connection_context_t<typename t_payload_net_handler::connection_context>>
-  node_server<t_payload_net_handler>::public_connect(network_zone& zone, epee::net_utils::network_address const& na)
+  node_server<t_payload_net_handler>::public_connect(network_zone& zone, epee::net_utils::network_address const& na, epee::net_utils::ssl_support_t ssl_support)
   {
     CHECK_AND_ASSERT_MES(na.get_type_id() == epee::net_utils::ipv4_network_address::get_type_id(), boost::none,
       "Only IPv4 addresses are supported here");
@@ -2480,7 +2481,7 @@ namespace nodetool
     const bool res = zone.m_net_server.connect(epee::string_tools::get_ip_string_from_int32(ipv4.ip()),
       epee::string_tools::num_to_string_fast(ipv4.port()),
       zone.m_config.m_net_config.connection_timeout,
-      con);
+      con, "0.0.0.0", ssl_support);
 
     if (res)
       return {std::move(con)};
diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index b524273bf..29597f5cc 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -76,6 +76,11 @@ namespace cryptonote
     command_line::add_arg(desc, arg_rpc_bind_port);
     command_line::add_arg(desc, arg_rpc_restricted_bind_port);
     command_line::add_arg(desc, arg_restricted_rpc);
+    command_line::add_arg(desc, arg_rpc_ssl);
+    command_line::add_arg(desc, arg_rpc_ssl_private_key);
+    command_line::add_arg(desc, arg_rpc_ssl_certificate);
+    command_line::add_arg(desc, arg_rpc_ssl_allowed_certificates);
+    command_line::add_arg(desc, arg_rpc_ssl_allow_any_cert);
     command_line::add_arg(desc, arg_bootstrap_daemon_address);
     command_line::add_arg(desc, arg_bootstrap_daemon_login);
     cryptonote::rpc_args::init_options(desc);
@@ -112,11 +117,11 @@ namespace cryptonote
         epee::net_utils::http::login login;
         login.username = bootstrap_daemon_login.substr(0, loc);
         login.password = bootstrap_daemon_login.substr(loc + 1);
-        m_http_client.set_server(m_bootstrap_daemon_address, login, false);
+        m_http_client.set_server(m_bootstrap_daemon_address, login, epee::net_utils::ssl_support_t::e_ssl_support_autodetect);
       }
       else
       {
-        m_http_client.set_server(m_bootstrap_daemon_address, boost::none, false);
+        m_http_client.set_server(m_bootstrap_daemon_address, boost::none, epee::net_utils::ssl_support_t::e_ssl_support_autodetect);
       }
       m_should_use_bootstrap_daemon = true;
     }
@@ -131,9 +136,32 @@ namespace cryptonote
     if (rpc_config->login)
       http_login.emplace(std::move(rpc_config->login->username), std::move(rpc_config->login->password).password());
 
+    epee::net_utils::ssl_support_t ssl_support;
+    const std::string ssl = command_line::get_arg(vm, arg_rpc_ssl);
+    if (!epee::net_utils::ssl_support_from_string(ssl_support, ssl))
+    {
+      MFATAL("Invalid RPC SSL support: " << ssl);
+      return false;
+    }
+    const std::string ssl_private_key = command_line::get_arg(vm, arg_rpc_ssl_private_key);
+    const std::string ssl_certificate = command_line::get_arg(vm, arg_rpc_ssl_certificate);
+    const std::vector<std::string> ssl_allowed_certificate_paths = command_line::get_arg(vm, arg_rpc_ssl_allowed_certificates);
+    std::list<std::string> ssl_allowed_certificates;
+    for (const std::string &path: ssl_allowed_certificate_paths)
+    {
+      ssl_allowed_certificates.push_back({});
+      if (!epee::file_io_utils::load_file_to_string(path, ssl_allowed_certificates.back()))
+      {
+        MERROR("Failed to load certificate: " << path);
+        ssl_allowed_certificates.back() = std::string();
+      }
+    }
+    const bool ssl_allow_any_cert = command_line::get_arg(vm, arg_rpc_ssl_allow_any_cert);
+
     auto rng = [](size_t len, uint8_t *ptr){ return crypto::rand(len, ptr); };
     return epee::http_server_impl_base<core_rpc_server, connection_context>::init(
-      rng, std::move(port), std::move(rpc_config->bind_ip), std::move(rpc_config->access_control_origins), std::move(http_login)
+      rng, std::move(port), std::move(rpc_config->bind_ip), std::move(rpc_config->access_control_origins), std::move(http_login),
+      ssl_support, std::make_pair(ssl_private_key, ssl_certificate), ssl_allowed_certificates, ssl_allow_any_cert
     );
   }
   //------------------------------------------------------------------------------------------------------------------------------
@@ -2317,6 +2345,35 @@ namespace cryptonote
     , false
     };
 
+  const command_line::arg_descriptor<std::string> core_rpc_server::arg_rpc_ssl = {
+      "rpc-ssl"
+    , "Enable SSL on RPC connections: enabled|disabled|autodetect"
+    , "autodetect"
+    };
+
+  const command_line::arg_descriptor<std::string> core_rpc_server::arg_rpc_ssl_private_key = {
+      "rpc-ssl-private-key"
+    , "Path to a PEM format private key"
+    , ""
+    };
+
+  const command_line::arg_descriptor<std::string> core_rpc_server::arg_rpc_ssl_certificate = {
+      "rpc-ssl-certificate"
+    , "Path to a PEM format certificate"
+    , ""
+    };
+
+  const command_line::arg_descriptor<std::vector<std::string>> core_rpc_server::arg_rpc_ssl_allowed_certificates = {
+      "rpc-ssl-allowed-certificates"
+    , "List of paths to PEM format certificates of allowed peers (all allowed if empty)"
+    };
+
+  const command_line::arg_descriptor<bool> core_rpc_server::arg_rpc_ssl_allow_any_cert = {
+      "rpc-ssl-allow-any-cert"
+    , "Allow any peer certificate, rather than just those on the allowed list"
+    , false
+    };
+
   const command_line::arg_descriptor<std::string> core_rpc_server::arg_bootstrap_daemon_address = {
       "bootstrap-daemon-address"
     , "URL of a 'bootstrap' remote daemon that the connected wallets can use while this daemon is still not fully synced"
diff --git a/src/rpc/core_rpc_server.h b/src/rpc/core_rpc_server.h
index 62a377841..da1907af2 100644
--- a/src/rpc/core_rpc_server.h
+++ b/src/rpc/core_rpc_server.h
@@ -56,6 +56,11 @@ namespace cryptonote
     static const command_line::arg_descriptor<std::string, false, true, 2> arg_rpc_bind_port;
     static const command_line::arg_descriptor<std::string> arg_rpc_restricted_bind_port;
     static const command_line::arg_descriptor<bool> arg_restricted_rpc;
+    static const command_line::arg_descriptor<std::string> arg_rpc_ssl;
+    static const command_line::arg_descriptor<std::string> arg_rpc_ssl_private_key;
+    static const command_line::arg_descriptor<std::string> arg_rpc_ssl_certificate;
+    static const command_line::arg_descriptor<std::vector<std::string>> arg_rpc_ssl_allowed_certificates;
+    static const command_line::arg_descriptor<bool> arg_rpc_ssl_allow_any_cert;
     static const command_line::arg_descriptor<std::string> arg_bootstrap_daemon_address;
     static const command_line::arg_descriptor<std::string> arg_bootstrap_daemon_login;
 
diff --git a/src/simplewallet/simplewallet.cpp b/src/simplewallet/simplewallet.cpp
index 3cbfb760b..90dc55c96 100644
--- a/src/simplewallet/simplewallet.cpp
+++ b/src/simplewallet/simplewallet.cpp
@@ -8402,7 +8402,8 @@ bool simple_wallet::status(const std::vector<std::string> &args)
 {
   uint64_t local_height = m_wallet->get_blockchain_current_height();
   uint32_t version = 0;
-  if (!m_wallet->check_connection(&version))
+  bool ssl = false;
+  if (!m_wallet->check_connection(&version, &ssl))
   {
     success_msg_writer() << "Refreshed " << local_height << "/?, no daemon connected";
     return true;
@@ -8414,7 +8415,7 @@ bool simple_wallet::status(const std::vector<std::string> &args)
   {
     bool synced = local_height == bc_height;
     success_msg_writer() << "Refreshed " << local_height << "/" << bc_height << ", " << (synced ? "synced" : "syncing")
-        << ", daemon RPC v" << get_version_string(version);
+        << ", daemon RPC v" << get_version_string(version) << ", " << (ssl ? "SSL" : "no SSL");
   }
   else
   {
diff --git a/src/wallet/api/wallet.cpp b/src/wallet/api/wallet.cpp
index 935a8d51c..2b7853330 100644
--- a/src/wallet/api/wallet.cpp
+++ b/src/wallet/api/wallet.cpp
@@ -1924,7 +1924,7 @@ bool WalletImpl::verifyMessageWithPublicKey(const std::string &message, const st
 
 bool WalletImpl::connectToDaemon()
 {
-    bool result = m_wallet->check_connection(NULL, DEFAULT_CONNECTION_TIMEOUT_MILLIS);
+    bool result = m_wallet->check_connection(NULL, NULL, DEFAULT_CONNECTION_TIMEOUT_MILLIS);
     if (!result) {
         setStatusError("Error connecting to daemon at " + m_wallet->get_daemon_address());
     } else {
@@ -1937,7 +1937,7 @@ bool WalletImpl::connectToDaemon()
 Wallet::ConnectionStatus WalletImpl::connected() const
 {
     uint32_t version = 0;
-    m_is_connected = m_wallet->check_connection(&version, DEFAULT_CONNECTION_TIMEOUT_MILLIS);
+    m_is_connected = m_wallet->check_connection(&version, NULL, DEFAULT_CONNECTION_TIMEOUT_MILLIS);
     if (!m_is_connected)
         return Wallet::ConnectionStatus_Disconnected;
     // Version check is not implemented in light wallets nodes/wallets
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index c02d10ab4..ac405157f 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -237,6 +237,11 @@ struct options {
   const command_line::arg_descriptor<std::string> password_file = {"password-file", tools::wallet2::tr("Wallet password file"), "", true};
   const command_line::arg_descriptor<int> daemon_port = {"daemon-port", tools::wallet2::tr("Use daemon instance at port <arg> instead of 18081"), 0};
   const command_line::arg_descriptor<std::string> daemon_login = {"daemon-login", tools::wallet2::tr("Specify username[:password] for daemon RPC client"), "", true};
+  const command_line::arg_descriptor<std::string> daemon_ssl = {"daemon-ssl", tools::wallet2::tr("Enable SSL on daemon RPC connections: enabled|disabled|autodetect"), "autodetect"};
+  const command_line::arg_descriptor<std::string> daemon_ssl_private_key = {"daemon-ssl-private-key", tools::wallet2::tr("Path to a PEM format private key"), ""};
+  const command_line::arg_descriptor<std::string> daemon_ssl_certificate = {"daemon-ssl-certificate", tools::wallet2::tr("Path to a PEM format certificate"), ""};
+  const command_line::arg_descriptor<std::vector<std::string>> daemon_ssl_allowed_certificates = {"daemon-ssl-allowed-certificates", tools::wallet2::tr("List of paths to PEM format certificates of allowed RPC servers")};
+  const command_line::arg_descriptor<bool> daemon_ssl_allow_any_cert = {"daemon-ssl-allow-any-cert", tools::wallet2::tr("Allow any SSL certificate from the daemon"), false};
   const command_line::arg_descriptor<bool> testnet = {"testnet", tools::wallet2::tr("For testnet. Daemon must also be launched with --testnet flag"), false};
   const command_line::arg_descriptor<bool> stagenet = {"stagenet", tools::wallet2::tr("For stagenet. Daemon must also be launched with --stagenet flag"), false};
   const command_line::arg_descriptor<std::string, false, true, 2> shared_ringdb_dir = {
@@ -308,6 +313,14 @@ std::unique_ptr<tools::wallet2> make_basic(const boost::program_options::variabl
   auto daemon_port = command_line::get_arg(vm, opts.daemon_port);
   auto device_name = command_line::get_arg(vm, opts.hw_device);
   auto device_derivation_path = command_line::get_arg(vm, opts.hw_device_derivation_path);
+  auto daemon_ssl_private_key = command_line::get_arg(vm, opts.daemon_ssl_private_key);
+  auto daemon_ssl_certificate = command_line::get_arg(vm, opts.daemon_ssl_certificate);
+  auto daemon_ssl_allowed_certificates = command_line::get_arg(vm, opts.daemon_ssl_allowed_certificates);
+  auto daemon_ssl_allow_any_cert = command_line::get_arg(vm, opts.daemon_ssl_allow_any_cert);
+  auto daemon_ssl = command_line::get_arg(vm, opts.daemon_ssl);
+  epee::net_utils::ssl_support_t ssl_support;
+  THROW_WALLET_EXCEPTION_IF(!epee::net_utils::ssl_support_from_string(ssl_support, daemon_ssl), tools::error::wallet_internal_error,
+      tools::wallet2::tr("Invalid argument for ") + std::string(opts.daemon_ssl.name));
 
   THROW_WALLET_EXCEPTION_IF(!daemon_address.empty() && !daemon_host.empty() && 0 != daemon_port,
       tools::error::wallet_internal_error, tools::wallet2::tr("can't specify daemon host or port more than once"));
@@ -358,8 +371,20 @@ std::unique_ptr<tools::wallet2> make_basic(const boost::program_options::variabl
     catch (const std::exception &e) { }
   }
 
+  std::list<std::string> ssl_allowed_certificates;
+  for (const std::string &path: daemon_ssl_allowed_certificates)
+  {
+      ssl_allowed_certificates.push_back({});
+      if (!epee::file_io_utils::load_file_to_string(path, ssl_allowed_certificates.back()))
+      {
+        MERROR("Failed to load certificate: " << path);
+        ssl_allowed_certificates.back() = std::string();
+      }
+  }
+
   std::unique_ptr<tools::wallet2> wallet(new tools::wallet2(nettype, kdf_rounds, unattended));
-  wallet->init(std::move(daemon_address), std::move(login), 0, false, *trusted_daemon);
+  wallet->init(std::move(daemon_address), std::move(login), 0, *trusted_daemon, ssl_support, std::make_pair(daemon_ssl_private_key, daemon_ssl_certificate), ssl_allowed_certificates, daemon_ssl_allow_any_cert);
+
   boost::filesystem::path ringdb_path = command_line::get_arg(vm, opts.shared_ringdb_dir);
   wallet->set_ring_database(ringdb_path.string());
   wallet->get_message_store().set_options(vm);
@@ -1015,6 +1040,11 @@ void wallet2::init_options(boost::program_options::options_description& desc_par
   command_line::add_arg(desc_params, opts.password_file);
   command_line::add_arg(desc_params, opts.daemon_port);
   command_line::add_arg(desc_params, opts.daemon_login);
+  command_line::add_arg(desc_params, opts.daemon_ssl);
+  command_line::add_arg(desc_params, opts.daemon_ssl_private_key);
+  command_line::add_arg(desc_params, opts.daemon_ssl_certificate);
+  command_line::add_arg(desc_params, opts.daemon_ssl_allowed_certificates);
+  command_line::add_arg(desc_params, opts.daemon_ssl_allow_any_cert);
   command_line::add_arg(desc_params, opts.testnet);
   command_line::add_arg(desc_params, opts.stagenet);
   command_line::add_arg(desc_params, opts.shared_ringdb_dir);
@@ -1066,7 +1096,7 @@ std::unique_ptr<wallet2> wallet2::make_dummy(const boost::program_options::varia
 }
 
 //----------------------------------------------------------------------------------------------------
-bool wallet2::init(std::string daemon_address, boost::optional<epee::net_utils::http::login> daemon_login, uint64_t upper_transaction_weight_limit, bool ssl, bool trusted_daemon)
+bool wallet2::init(std::string daemon_address, boost::optional<epee::net_utils::http::login> daemon_login, uint64_t upper_transaction_weight_limit, bool trusted_daemon, epee::net_utils::ssl_support_t ssl_support, const std::pair<std::string, std::string> &private_key_and_certificate_path, const std::list<std::string> &allowed_certificates, bool allow_any_cert)
 {
   m_checkpoints.init_default_checkpoints(m_nettype);
   if(m_http_client.is_connected())
@@ -1076,8 +1106,7 @@ bool wallet2::init(std::string daemon_address, boost::optional<epee::net_utils::
   m_daemon_address = std::move(daemon_address);
   m_daemon_login = std::move(daemon_login);
   m_trusted_daemon = trusted_daemon;
-  // When switching from light wallet to full wallet, we need to reset the height we got from lw node.
-  return m_http_client.set_server(get_daemon_address(), get_daemon_login(), ssl);
+  return m_http_client.set_server(get_daemon_address(), get_daemon_login(), ssl_support, private_key_and_certificate_path, allowed_certificates, allow_any_cert);
 }
 //----------------------------------------------------------------------------------------------------
 bool wallet2::is_deterministic() const
@@ -4848,7 +4877,7 @@ bool wallet2::prepare_file_names(const std::string& file_path)
   return true;
 }
 //----------------------------------------------------------------------------------------------------
-bool wallet2::check_connection(uint32_t *version, uint32_t timeout)
+bool wallet2::check_connection(uint32_t *version, bool *ssl, uint32_t timeout)
 {
   THROW_WALLET_EXCEPTION_IF(!m_is_initialized, error::wallet_not_initialized);
 
@@ -4856,15 +4885,20 @@ bool wallet2::check_connection(uint32_t *version, uint32_t timeout)
 
   // TODO: Add light wallet version check.
   if(m_light_wallet) {
-      version = 0;
+      if (version)
+        *version = 0;
+      if (ssl)
+        *ssl = m_light_wallet_connected; // light wallet is always SSL
       return m_light_wallet_connected;
   }
 
-  if(!m_http_client.is_connected())
+  if(!m_http_client.is_connected(ssl))
   {
     m_node_rpc_proxy.invalidate();
     if (!m_http_client.connect(std::chrono::milliseconds(timeout)))
       return false;
+    if(!m_http_client.is_connected(ssl))
+      return false;
   }
 
   if (version)
diff --git a/src/wallet/wallet2.h b/src/wallet/wallet2.h
index 3b2dd6076..83ad7e56b 100644
--- a/src/wallet/wallet2.h
+++ b/src/wallet/wallet2.h
@@ -676,7 +676,11 @@ namespace tools
 
     bool deinit();
     bool init(std::string daemon_address = "http://localhost:8080",
-      boost::optional<epee::net_utils::http::login> daemon_login = boost::none, uint64_t upper_transaction_weight_limit = 0, bool ssl = false, bool trusted_daemon = false);
+      boost::optional<epee::net_utils::http::login> daemon_login = boost::none, uint64_t upper_transaction_weight_limit = 0,
+      bool trusted_daemon = true,
+      epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect,
+      const std::pair<std::string, std::string> &private_key_and_certificate_path = {},
+      const std::list<std::string> &allowed_certificates = {}, bool allow_any_cert = false);
 
     void stop() { m_run.store(false, std::memory_order_relaxed); m_message_store.stop(); }
 
@@ -800,7 +804,7 @@ namespace tools
     bool sign_multisig_tx_to_file(multisig_tx_set &exported_txs, const std::string &filename, std::vector<crypto::hash> &txids);
     std::vector<pending_tx> create_unmixable_sweep_transactions();
     void discard_unmixable_outputs();
-    bool check_connection(uint32_t *version = NULL, uint32_t timeout = 200000);
+    bool check_connection(uint32_t *version = NULL, bool *ssl = NULL, uint32_t timeout = 200000);
     void get_transfers(wallet2::transfer_container& incoming_transfers) const;
     void get_payments(const crypto::hash& payment_id, std::list<wallet2::payment_details>& payments, uint64_t min_height = 0, const boost::optional<uint32_t>& subaddr_account = boost::none, const std::set<uint32_t>& subaddr_indices = {}) const;
     void get_payments(std::list<std::pair<crypto::hash,wallet2::payment_details>>& payments, uint64_t min_height, uint64_t max_height = (uint64_t)-1, const boost::optional<uint32_t>& subaddr_account = boost::none, const std::set<uint32_t>& subaddr_indices = {}) const;
diff --git a/src/wallet/wallet_rpc_server.cpp b/src/wallet/wallet_rpc_server.cpp
index c87c2fca6..fd95c19a9 100644
--- a/src/wallet/wallet_rpc_server.cpp
+++ b/src/wallet/wallet_rpc_server.cpp
@@ -63,6 +63,10 @@ namespace
   const command_line::arg_descriptor<bool> arg_restricted = {"restricted-rpc", "Restricts to view-only commands", false};
   const command_line::arg_descriptor<std::string> arg_wallet_dir = {"wallet-dir", "Directory for newly created wallets"};
   const command_line::arg_descriptor<bool> arg_prompt_for_password = {"prompt-for-password", "Prompts for password when not provided", false};
+  const command_line::arg_descriptor<std::string> arg_rpc_ssl = {"rpc-ssl", tools::wallet2::tr("Enable SSL on wallet RPC connections: enabled|disabled|autodetect"), "autodetect"};
+  const command_line::arg_descriptor<std::string> arg_rpc_ssl_private_key = {"rpc-ssl-private-key", tools::wallet2::tr("Path to a PEM format private key"), ""};
+  const command_line::arg_descriptor<std::string> arg_rpc_ssl_certificate = {"rpc-ssl-certificate", tools::wallet2::tr("Path to a PEM format certificate"), ""};
+  const command_line::arg_descriptor<std::vector<std::string>> arg_rpc_ssl_allowed_certificates = {"rpc-ssl-allowed-certificates", tools::wallet2::tr("List of paths to PEM format certificates of allowed RPC servers (all allowed if empty)")};
 
   constexpr const char default_rpc_username[] = "monero";
 
@@ -233,10 +237,32 @@ namespace tools
       assert(bool(http_login));
     } // end auth enabled
 
+    auto rpc_ssl_private_key = command_line::get_arg(vm, arg_rpc_ssl_private_key);
+    auto rpc_ssl_certificate = command_line::get_arg(vm, arg_rpc_ssl_certificate);
+    auto rpc_ssl_allowed_certificates = command_line::get_arg(vm, arg_rpc_ssl_allowed_certificates);
+    auto rpc_ssl = command_line::get_arg(vm, arg_rpc_ssl);
+    epee::net_utils::ssl_support_t rpc_ssl_support;
+    if (!epee::net_utils::ssl_support_from_string(rpc_ssl_support, rpc_ssl))
+    {
+      MERROR("Invalid argument for " << std::string(arg_rpc_ssl.name));
+      return false;
+    }
+    std::list<std::string> allowed_certificates;
+    for (const std::string &path: rpc_ssl_allowed_certificates)
+    {
+        allowed_certificates.push_back({});
+        if (!epee::file_io_utils::load_file_to_string(path, allowed_certificates.back()))
+        {
+          MERROR("Failed to load certificate: " << path);
+          allowed_certificates.back() = std::string();
+        }
+    }
+
     m_net_server.set_threads_prefix("RPC");
     auto rng = [](size_t len, uint8_t *ptr) { return crypto::rand(len, ptr); };
     return epee::http_server_impl_base<wallet_rpc_server, connection_context>::init(
-      rng, std::move(bind_port), std::move(rpc_config->bind_ip), std::move(rpc_config->access_control_origins), std::move(http_login)
+      rng, std::move(bind_port), std::move(rpc_config->bind_ip), std::move(rpc_config->access_control_origins), std::move(http_login),
+      rpc_ssl_support, std::make_pair(rpc_ssl_private_key, rpc_ssl_certificate), allowed_certificates
     );
   }
   //------------------------------------------------------------------------------------------------------------------------------
@@ -3937,6 +3963,10 @@ int main(int argc, char** argv) {
   command_line::add_arg(desc_params, arg_from_json);
   command_line::add_arg(desc_params, arg_wallet_dir);
   command_line::add_arg(desc_params, arg_prompt_for_password);
+  command_line::add_arg(desc_params, arg_rpc_ssl);
+  command_line::add_arg(desc_params, arg_rpc_ssl_private_key);
+  command_line::add_arg(desc_params, arg_rpc_ssl_certificate);
+  command_line::add_arg(desc_params, arg_rpc_ssl_allowed_certificates);
 
   daemonizer::init_options(hidden_options, desc_params);
   desc_params.add(hidden_options);