extract and verify family from RouterInfo

Family.cpp

@@ -101,12 +101,12 @@ namespace data
 			LogPrint (eLogInfo, "Family: ", numCertificates, " certificates loaded");
 	}
 
-	bool Families::VerifyFamily (const char * family, const IdentHash& ident, 
+	bool Families::VerifyFamily (const std::string& family, const IdentHash& ident, 
 		const char * signature, const char * key)
 	{
 		uint8_t buf[50], signatureBuf[64];
-		size_t len = strlen (family), signatureLen = strlen (signature);
+		size_t len = family.length (), signatureLen = strlen (signature);
-		memcpy (buf, family, len);
+		memcpy (buf, family.c_str (), len);
 		memcpy (buf + len, (const uint8_t *)ident, 32);
 		len += 32;	
 		Base64ToByteStream (signature, signatureLen, signatureBuf, 64);	

Family.h

@@ -18,8 +18,8 @@ namespace data
 			Families ();
 			~Families ();
 			void LoadCertificates ();
-			bool VerifyFamily (const char * family, const IdentHash& ident, 
+			bool VerifyFamily (const std::string& family, const IdentHash& ident, 
-				const char * signature, const char * key);
+				const char * signature, const char * key = nullptr);
 
 		private:
 

NetDb.h

@@ -62,6 +62,7 @@ namespace data
 			void PostI2NPMsg (std::shared_ptr<const I2NPMessage> msg);
 
 			void Reseed ();
+			Families& GetFamilies () { return m_Families; };
 
 			// for web interface
 			int GetNumRouters () const { return m_RouterInfos.size (); };

RouterInfo.cpp

@@ -8,6 +8,7 @@
 #include "Base.h"
 #include "Timestamp.h"
 #include "Log.h"
+#include "NetDb.h"
 #include "RouterInfo.h"
 
 namespace i2p
@@ -262,11 +263,26 @@ namespace data
 			if (!strcmp (key, "caps"))
 				ExtractCaps (value);
 			// check netId
-			if (!strcmp (key, "netId") && atoi (value) != I2PD_NET_ID)
+			else if (!strcmp (key, "netId") && atoi (value) != I2PD_NET_ID)
 			{
 				LogPrint (eLogError, "Unexpected netid=", value);
 				m_IsUnreachable = true;		
 			}	
+			// family
+			else if (!strcmp (key, "family"))
+			{
+				m_Family = value;
+				boost::to_lower (m_Family);
+			}
+			else if (!strcmp (key, "family.sig"))
+			{
+				if (!netdb.GetFamilies ().VerifyFamily (m_Family, GetIdentHash (), value))
+				{
+					LogPrint (eLogWarning, "RouterInfo: family signature verification failed");
+					m_Family.clear ();
+				}
+			}				
+
 			if (!s) return;
 		}		
 

RouterInfo.h

@@ -180,7 +180,7 @@ namespace data
 
 		private:
 
-			std::string m_FullPath;
+			std::string m_FullPath, m_Family;
 			std::shared_ptr<const IdentityEx> m_RouterIdentity;
 			uint8_t * m_Buffer;
 			size_t m_BufferLen;