restrict public node checks a little

do not include blocked hosts in peer lists or public node lists by default,
warn about no https on clearnet and about untrusted peers likely being spies

src/common/util.cpp

@@ -871,10 +871,19 @@ std::string get_nix_version_display_string()
     return max_concurrency;
   }
 
+  bool is_privacy_preserving_network(const std::string &address)
+  {
+    if (boost::ends_with(address, ".onion"))
+      return true;
+    if (boost::ends_with(address, ".i2p"))
+      return true;
+    return false;
+  }
+
   bool is_local_address(const std::string &address)
   {
     // always assume Tor/I2P addresses to be untrusted by default
-    if (boost::ends_with(address, ".onion") || boost::ends_with(address, ".i2p"))
+    if (is_privacy_preserving_network(address))
     {
       MDEBUG("Address '" << address << "' is Tor/I2P, non local");
       return false;

src/common/util.h

@@ -228,6 +228,7 @@ namespace tools
   unsigned get_max_concurrency();
 
   bool is_local_address(const std::string &address);
+  bool is_privacy_preserving_network(const std::string &address);
   int vercmp(const char *v0, const char *v1); // returns < 0, 0, > 0, similar to strcmp, but more human friendly than lexical - does not attempt to validate
 
   bool sha256sum(const uint8_t *data, size_t len, crypto::hash &hash);

src/daemon/rpc_command_executor.cpp

@@ -191,6 +191,9 @@ bool t_rpc_command_executor::print_peer_list(bool white, bool gray, size_t limit
   cryptonote::COMMAND_RPC_GET_PEER_LIST::response res;
 
   std::string failure_message = "Couldn't retrieve peer list";
+
+  req.include_blocked = true;
+
   if (m_is_rpc)
   {
     if (!m_rpc_client->rpc_request(req, res, "/get_peer_list", failure_message.c_str()))
@@ -237,6 +240,7 @@ bool t_rpc_command_executor::print_peer_list_stats() {
   std::string failure_message = "Couldn't retrieve peer list";
 
   req.public_only = false;
+  req.include_blocked = true;
 
   if (m_is_rpc)
   {

src/rpc/core_rpc_server.cpp

@@ -190,6 +190,7 @@ namespace cryptonote
 
     request.gray = true;
     request.white = true;
+    request.include_blocked = false;
     if (!on_get_public_nodes(request, response) || response.status != CORE_RPC_STATUS_OK)
     {
       return {};
@@ -1383,6 +1384,8 @@ namespace cryptonote
 
     for (auto & entry : white_list)
     {
+      if (!req.include_blocked && m_p2p.is_host_blocked(entry.adr, NULL))
+        continue;
       if (entry.adr.get_type_id() == epee::net_utils::ipv4_network_address::get_type_id())
         res.white_list.emplace_back(entry.id, entry.adr.as<epee::net_utils::ipv4_network_address>().ip(),
             entry.adr.as<epee::net_utils::ipv4_network_address>().port(), entry.last_seen, entry.pruning_seed, entry.rpc_port, entry.rpc_credits_per_hash);
@@ -1395,6 +1398,8 @@ namespace cryptonote
 
     for (auto & entry : gray_list)
     {
+      if (!req.include_blocked && m_p2p.is_host_blocked(entry.adr, NULL))
+        continue;
       if (entry.adr.get_type_id() == epee::net_utils::ipv4_network_address::get_type_id())
         res.gray_list.emplace_back(entry.id, entry.adr.as<epee::net_utils::ipv4_network_address>().ip(),
             entry.adr.as<epee::net_utils::ipv4_network_address>().port(), entry.last_seen, entry.pruning_seed, entry.rpc_port, entry.rpc_credits_per_hash);
@@ -1413,8 +1418,10 @@ namespace cryptonote
   {
     RPC_TRACKER(get_public_nodes);
 
+    COMMAND_RPC_GET_PEER_LIST::request peer_list_req;
     COMMAND_RPC_GET_PEER_LIST::response peer_list_res;
-    const bool success = on_get_peer_list(COMMAND_RPC_GET_PEER_LIST::request(), peer_list_res, ctx);
+    peer_list_req.include_blocked = req.include_blocked;
+    const bool success = on_get_peer_list(peer_list_req, peer_list_res, ctx);
     res.status = peer_list_res.status;
     if (!success)
     {      

src/rpc/core_rpc_server_commands_defs.h

@@ -88,7 +88,7 @@ namespace cryptonote
 // advance which version they will stop working with
 // Don't go over 32767 for any of these
 #define CORE_RPC_VERSION_MAJOR 3
-#define CORE_RPC_VERSION_MINOR 4
+#define CORE_RPC_VERSION_MINOR 5
 #define MAKE_CORE_RPC_VERSION(major,minor) (((major)<<16)|(minor))
 #define CORE_RPC_VERSION MAKE_CORE_RPC_VERSION(CORE_RPC_VERSION_MAJOR, CORE_RPC_VERSION_MINOR)
 
@@ -1195,10 +1195,12 @@ namespace cryptonote
     struct request_t: public rpc_request_base
     {
       bool public_only;
+      bool include_blocked;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE_PARENT(rpc_request_base)
         KV_SERIALIZE_OPT(public_only, true)
+        KV_SERIALIZE_OPT(include_blocked, false)
       END_KV_SERIALIZE_MAP()
     };
     typedef epee::misc_utils::struct_init<request_t> request;
@@ -1244,11 +1246,13 @@ namespace cryptonote
     {
       bool gray;
       bool white;
+      bool include_blocked;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE_PARENT(rpc_request_base)
         KV_SERIALIZE_OPT(gray, false)
         KV_SERIALIZE_OPT(white, true)
+        KV_SERIALIZE_OPT(include_blocked, false)
       END_KV_SERIALIZE_MAP()
     };
     typedef epee::misc_utils::struct_init<request_t> request;

src/simplewallet/simplewallet.cpp

@@ -181,7 +181,7 @@ namespace
   const command_line::arg_descriptor< std::vector<std::string> > arg_command = {"command", ""};
 
   const char* USAGE_START_MINING("start_mining [<number_of_threads>] [bg_mining] [ignore_battery]");
-  const char* USAGE_SET_DAEMON("set_daemon <host>[:<port>] [trusted|untrusted]");
+  const char* USAGE_SET_DAEMON("set_daemon <host>[:<port>] [trusted|untrusted|this-is-probably-a-spy-node]");
   const char* USAGE_SHOW_BALANCE("balance [detail]");
   const char* USAGE_INCOMING_TRANSFERS("incoming_transfers [available|unavailable] [verbose] [uses] [index=<N1>[,<N2>[,...]]]");
   const char* USAGE_PAYMENTS("payments <PID_1> [<PID_2> ... <PID_N>]");
@@ -2286,6 +2286,7 @@ bool simple_wallet::public_nodes(const std::vector<std::string> &args)
   {
     fail_msg_writer() << tr("Error retrieving public node list: ") << e.what();
   }
+  message_writer(console_color_red, true) << tr("Most of these nodes are probably spies. You should not use them unless connecting via Tor or I2P");
   return true;
 }
 
@@ -3240,7 +3241,7 @@ simple_wallet::simple_wallet()
   m_cmd_binder.set_handler("set_daemon",
                            boost::bind(&simple_wallet::on_command, this, &simple_wallet::set_daemon, _1),
                            tr(USAGE_SET_DAEMON),
-                           tr("Set another daemon to connect to."));
+                           tr("Set another daemon to connect to. If it's not yours, it'll probably spy on you."));
   m_cmd_binder.set_handler("save_bc",
                            boost::bind(&simple_wallet::on_command, this, &simple_wallet::save_bc, _1),
                            tr("Save the current blockchain data."));
@@ -5527,21 +5528,51 @@ bool simple_wallet::set_daemon(const std::vector<std::string>& args)
     } else {
       daemon_url = args[0];
     }
-    LOCK_IDLE_SCOPE();
-    m_wallet->init(daemon_url);
 
+    epee::net_utils::http::url_content parsed{};
+    const bool r = epee::net_utils::parse_url(daemon_url, parsed);
+    if (!r)
+    {
+      fail_msg_writer() << tr("Failed to parse address");
+      return true;
+    }
+
+    std::string trusted;
     if (args.size() == 2)
     {
       if (args[1] == "trusted")
-        m_wallet->set_trusted_daemon(true);
+        trusted = "trusted";
       else if (args[1] == "untrusted")
-        m_wallet->set_trusted_daemon(false);
+        trusted = "untrusted";
+      else if (args[1] == "this-is-probably-a-spy-node")
+        trusted = "this-is-probably-a-spy-node";
       else
       {
-        fail_msg_writer() << tr("Expected trusted or untrusted, got ") << args[1] << ": assuming untrusted";
+        fail_msg_writer() << tr("Expected trusted, untrusted or this-is-probably-a-spy-node got ") << args[1];
-        m_wallet->set_trusted_daemon(false);
+        return true;
       }
     }
+
+    if (!tools::is_privacy_preserving_network(parsed.host) && !tools::is_local_address(parsed.host))
+    {
+      if (trusted == "untrusted" || trusted == "")
+      {
+        fail_msg_writer() << tr("This is not Tor/I2P address, and is not a trusted daemon.");
+        fail_msg_writer() << tr("Either use your own trusted node, connect via Tor or I2P, or pass this-is-probably-a-spy-node and be spied on.");
+        return true;
+      }
+
+      if (parsed.schema != "https")
+        message_writer(console_color_red) << tr("Warning: connecting to a non-local daemon without SSL, passive adversaries will be able to spy on you.");
+    }
+
+    LOCK_IDLE_SCOPE();
+    m_wallet->init(daemon_url);
+
+    if (!trusted.empty())
+    {
+      m_wallet->set_trusted_daemon(trusted == "trusted");
+    }
     else
     {
       m_wallet->set_trusted_daemon(false);

src/wallet/wallet2.cpp

@@ -14179,6 +14179,7 @@ std::vector<cryptonote::public_node> wallet2::get_public_nodes(bool white_only)
 
   req.white = true;
   req.gray = !white_only;
+  req.include_blocked = false;
 
   {
     const boost::lock_guard<boost::recursive_mutex> lock{m_daemon_rpc_mutex};