set router's family

Config.cpp

@@ -113,6 +113,7 @@ namespace config {
       ("log",       value<std::string>()->default_value(""),     "Logs destination: stdout, file (stdout if not set, file - otherwise, for compatibility)")
       ("logfile",   value<std::string>()->default_value(""),     "Path to logfile (stdout if not set, autodetect if daemon)")
       ("loglevel",  value<std::string>()->default_value("info"), "Set the minimal level of log messages (debug, info, warn, error)")
+	  ("family",    value<std::string>()->default_value(""),     "Specify a family, router belongs to")
 	  ("datadir",   value<std::string>()->default_value(""),     "Path to storage of i2pd data (RI, keys, peer profiles, ...)")
       ("host",      value<std::string>()->default_value("0.0.0.0"),     "External IP")
       ("port",      value<uint16_t>()->default_value(0),                "Port to listen for incoming connections (default: auto)")

Daemon.cpp

@@ -132,6 +132,11 @@ namespace i2p
 				i2p::context.SetLowBandwidth ();
 			}
 
+			std::string family; i2p::config::GetOption("family", family);
+			i2p::context.SetFamily (family);
+			if (family.length () > 0)
+				LogPrint(eLogInfo, "Daemon: family set to ", family);	
+			
 			return true;
 		}
 			

Family.cpp

@@ -122,6 +122,51 @@ namespace data
 		return true;
 	}
 
+	std::string CreateFamilySignature (const std::string& family, const IdentHash& ident)
+	{
+		std::string sig;
+		auto filename = i2p::util::filesystem::GetDefaultDataDir() / "family" / (family + ".key");	
+		SSL_CTX * ctx = SSL_CTX_new (TLSv1_method ());
+		int ret = SSL_CTX_use_PrivateKey_file (ctx, filename.string ().c_str (), SSL_FILETYPE_PEM); 
+		if (ret)
+		{
+			SSL * ssl = SSL_new (ctx);
+			EVP_PKEY * pkey = SSL_get_privatekey (ssl);
+			EC_KEY * ecKey = EVP_PKEY_get1_EC_KEY (pkey);
+			if (ecKey)
+			{
+				auto group = EC_KEY_get0_group (ecKey);
+				if (group)
+				{
+					int curve = EC_GROUP_get_curve_name (group);
+					if (curve == NID_X9_62_prime256v1)
+					{
+						uint8_t signingPrivateKey[32], buf[50], signature[64];
+						i2p::crypto::bn2buf (EC_KEY_get0_private_key (ecKey), signingPrivateKey, 32);
+						i2p::crypto::ECDSAP256Signer signer (signingPrivateKey);
+						size_t len = family.length ();
+						memcpy (buf, family.c_str (), len);
+						memcpy (buf + len, (const uint8_t *)ident, 32);
+						len += 32;
+						signer.Sign (buf, len, signature);
+						len = Base64EncodingBufferSize (64);
+						char * b64 = new char[len+1];
+						len = ByteStreamToBase64 (signature, 64, b64, len);
+						b64[len] = 0;
+						sig = b64;
+						delete[] b64;
+					}
+					else
+						LogPrint (eLogWarning, "Family: elliptic curve ", curve, " is not supported");
+				}	
+			}	
+			SSL_free (ssl);		
+		}	
+		else
+			LogPrint (eLogError, "Family: Can't open keys file ", filename.string ());
+		SSL_CTX_free (ctx);	
+		return sig;
+	}	
 }
 }
 

Family.h

@@ -1,5 +1,5 @@
 #ifndef FAMILY_H__
-#define FAMILY_H_
+#define FAMILY_H__
 
 #include <map>
 #include <string>
@@ -29,6 +29,9 @@ namespace data
 
 			std::map<std::string, std::shared_ptr<i2p::crypto::Verifier> > m_SigningKeys;
 	};		
+
+	std::string CreateFamilySignature (const std::string& family, const IdentHash& ident);
+	// return base64 signature of empty string in case of failure
 }
 }
 

RouterContext.cpp

@@ -8,6 +8,7 @@
 #include "util.h"
 #include "version.h"
 #include "Log.h"
+#include "Family.h"
 #include "RouterContext.h"
 
 namespace i2p
@@ -141,12 +142,29 @@ namespace i2p
 		{
 			m_RouterInfo.SetCaps (m_RouterInfo.GetCaps () & ~i2p::data::RouterInfo::eFloodfill);
 			// we don't publish number of routers and leaseset for non-floodfill
-			m_RouterInfo.DeleteProperty (ROUTER_INFO_PROPERTY_LEASESETS);
-			m_RouterInfo.DeleteProperty (ROUTER_INFO_PROPERTY_ROUTERS);
+			m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_LEASESETS);
+			m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_ROUTERS);
 		}
 		UpdateRouterInfo ();
 	}
 
+	void RouterContext::SetFamily (const std::string& family)
+	{
+		std::string signature;
+		if (family.length () > 0)
+			signature = i2p::data::CreateFamilySignature (family, GetIdentHash ());
+		if (signature.length () > 0)
+		{
+			m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY, family);
+			m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY_SIG, signature);
+		}	
+		else
+		{
+			m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY);
+			m_RouterInfo.DeleteProperty (i2p::data::ROUTER_INFO_PROPERTY_FAMILY_SIG);
+		}	
+	}	
+		
 	void RouterContext::SetHighBandwidth ()
 	{
 		if (!m_RouterInfo.IsHighBandwidth () || m_RouterInfo.IsExtraBandwidth ())
@@ -284,8 +302,8 @@ namespace i2p
 		if (m_IsFloodfill)
 		{
 			// update routers and leasesets
-			m_RouterInfo.SetProperty (ROUTER_INFO_PROPERTY_LEASESETS, boost::lexical_cast<std::string>(i2p::data::netdb.GetNumLeaseSets ()));
-			m_RouterInfo.SetProperty (ROUTER_INFO_PROPERTY_ROUTERS, boost::lexical_cast<std::string>(i2p::data::netdb.GetNumRouters ()));
+			m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_LEASESETS, boost::lexical_cast<std::string>(i2p::data::netdb.GetNumLeaseSets ()));
+			m_RouterInfo.SetProperty (i2p::data::ROUTER_INFO_PROPERTY_ROUTERS, boost::lexical_cast<std::string>(i2p::data::netdb.GetNumRouters ()));
 			UpdateRouterInfo (); 
 		}
 	}

RouterContext.h

@@ -16,9 +16,6 @@ namespace i2p
 	const char ROUTER_KEYS[] = "router.keys";	
 	const int ROUTER_INFO_UPDATE_INTERVAL = 1800; // 30 minutes
 
-	const char ROUTER_INFO_PROPERTY_LEASESETS[] = "netdb.knownLeaseSets";
-	const char ROUTER_INFO_PROPERTY_ROUTERS[] = "netdb.knownRouters";		
-
 	enum RouterStatus
 	{
 		eRouterStatusOK = 0,
@@ -60,6 +57,7 @@ namespace i2p
 			void SetReachable ();
 			bool IsFloodfill () const { return m_IsFloodfill; };	
 			void SetFloodfill (bool floodfill);	
+			void SetFamily (const std::string& family);
 			void SetHighBandwidth ();
 			void SetLowBandwidth ();
 			void SetExtraBandwidth ();

RouterInfo.cpp

@@ -263,18 +263,18 @@ namespace data
 			if (!strcmp (key, "caps"))
 				ExtractCaps (value);
 			// check netId
-			else if (!strcmp (key, "netId") && atoi (value) != I2PD_NET_ID)
+			else if (!strcmp (key, ROUTER_INFO_PROPERTY_NETID) && atoi (value) != I2PD_NET_ID)
 			{
-				LogPrint (eLogError, "Unexpected netid=", value);
+				LogPrint (eLogError, "Unexpected ", ROUTER_INFO_PROPERTY_NETID, "=", value);
 				m_IsUnreachable = true;		
 			}	
 			// family
-			else if (!strcmp (key, "family"))
+			else if (!strcmp (key, ROUTER_INFO_PROPERTY_FAMILY))
 			{
 				m_Family = value;
 				boost::to_lower (m_Family);
 			}
-			else if (!strcmp (key, "family.sig"))
+			else if (!strcmp (key, ROUTER_INFO_PROPERTY_FAMILY_SIG))
 			{
 				if (!netdb.GetFamilies ().VerifyFamily (m_Family, GetIdentHash (), value))
 				{

RouterInfo.h

@@ -14,6 +14,12 @@ namespace i2p
 {
 namespace data
 {
+	const char ROUTER_INFO_PROPERTY_LEASESETS[] = "netdb.knownLeaseSets";
+	const char ROUTER_INFO_PROPERTY_ROUTERS[] = "netdb.knownRouters";	
+	const char ROUTER_INFO_PROPERTY_NETID[] = "netId";
+	const char ROUTER_INFO_PROPERTY_FAMILY[] = "family";	
+	const char ROUTER_INFO_PROPERTY_FAMILY_SIG[] = "family.sig";
+	
 	const char CAPS_FLAG_FLOODFILL = 'f';
 	const char CAPS_FLAG_HIDDEN = 'H';
 	const char CAPS_FLAG_REACHABLE = 'R';