lookup and handle encrypted LeaseSet2

libi2pd/Destination.cpp

@@ -361,8 +361,10 @@ namespace client
 		}
 		i2p::data::IdentHash key (buf + DATABASE_STORE_KEY_OFFSET);
 		std::shared_ptr<i2p::data::LeaseSet> leaseSet;
-		if (buf[DATABASE_STORE_TYPE_OFFSET] == i2p::data::NETDB_STORE_TYPE_LEASESET || // 1
-			buf[DATABASE_STORE_TYPE_OFFSET] == i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2) // 3
+		switch (buf[DATABASE_STORE_TYPE_OFFSET])
+		{
+			case i2p::data::NETDB_STORE_TYPE_LEASESET: // 1
+			case i2p::data::NETDB_STORE_TYPE_STANDARD_LEASESET2: // 3
 			{
 				LogPrint (eLogDebug, "Destination: Remote LeaseSet");
 				std::lock_guard<std::mutex> lock(m_RemoteLeaseSetsMutex);
@@ -407,9 +409,27 @@ namespace client
 						leaseSet = nullptr;
 					}
 				}
+				break;
+			}
+			case i2p::data::NETDB_STORE_TYPE_ENCRYPTED_LEASESET2: // 5
+			{
+				auto it2 = m_LeaseSetRequests.find (key);
+				if (it2 != m_LeaseSetRequests.end () && it2->second->requestedIdentity)
+				{
+					auto ls2 = std::make_shared<i2p::data::LeaseSet2> (buf + offset, len - offset, it2->second->requestedIdentity);
+					if (ls2->IsValid ())
+					{
+						m_RemoteLeaseSets[ls2->GetIdentHash ()] = ls2; // ident is not key
+						leaseSet = ls2;
+					}
 				}
 				else
+					LogPrint (eLogInfo, "Destination: Couldn't find request for encrypted LeaseSet2");
+				break;
+			}
+			default:
 				LogPrint (eLogError, "Destination: Unexpected client's DatabaseStore type ", buf[DATABASE_STORE_TYPE_OFFSET], ", dropped");
+		}
 
 		auto it1 = m_LeaseSetRequests.find (key);
 		if (it1 != m_LeaseSetRequests.end ())
@@ -605,7 +625,21 @@ namespace client
 				m_Service.post ([requestComplete](void){requestComplete (nullptr);});
 			return false;
 		}
-		m_Service.post (std::bind (&LeaseSetDestination::RequestLeaseSet, shared_from_this (), dest, requestComplete));
+		m_Service.post (std::bind (&LeaseSetDestination::RequestLeaseSet, shared_from_this (), dest, requestComplete, nullptr));
+		return true;
+	}
+
+	bool LeaseSetDestination::RequestDestinationWithEncryptedLeaseSet (std::shared_ptr<const i2p::data::IdentityEx> dest, RequestComplete requestComplete)
+	{
+		if (!m_Pool || !IsReady ())
+		{
+			if (requestComplete)
+				m_Service.post ([requestComplete](void){requestComplete (nullptr);});
+			return false;
+		}	
+		i2p::data::IdentHash ident;
+		i2p::data::LeaseSet2::CalculateStoreHash (dest, i2p::data::SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519, ident); // always assume type 11
+		m_Service.post (std::bind (&LeaseSetDestination::RequestLeaseSet, shared_from_this (), ident, requestComplete, dest));
 		return true;
 	}
 
@@ -624,13 +658,21 @@ namespace client
 			});
 	}
 
-	void LeaseSetDestination::RequestLeaseSet (const i2p::data::IdentHash& dest, RequestComplete requestComplete)
+	void LeaseSetDestination::CancelDestinationRequestWithEncryptedLeaseSet (std::shared_ptr<const i2p::data::IdentityEx> dest, bool notify)
+	{
+		i2p::data::IdentHash ident;
+		i2p::data::LeaseSet2::CalculateStoreHash (dest, i2p::data::SIGNING_KEY_TYPE_REDDSA_SHA512_ED25519, ident); // always assume type 11
+		CancelDestinationRequest (ident, notify);
+	}
+
+	void LeaseSetDestination::RequestLeaseSet (const i2p::data::IdentHash& dest, RequestComplete requestComplete, std::shared_ptr<const i2p::data::IdentityEx> requestedIdentity)
 	{
 		std::set<i2p::data::IdentHash> excluded;
 		auto floodfill = i2p::data::netdb.GetClosestFloodfill (dest, excluded);
 		if (floodfill)
 		{
 			auto request = std::make_shared<LeaseSetRequest> (m_Service);
+			request->requestedIdentity = requestedIdentity; // for encrypted LeaseSet2
 			if (requestComplete)
 				request->requestComplete.push_back (requestComplete);
 			auto ts = i2p::util::GetSecondsSinceEpoch ();

libi2pd/Destination.h

@@ -82,6 +82,7 @@ namespace client
 			std::list<RequestComplete> requestComplete;
 			std::shared_ptr<i2p::tunnel::OutboundTunnel> outboundTunnel;
 			std::shared_ptr<i2p::tunnel::InboundTunnel> replyTunnel;
+			std::shared_ptr<const i2p::data::IdentityEx> requestedIdentity; // for encrypted LeaseSet2 only
 
 			void Complete (std::shared_ptr<i2p::data::LeaseSet> ls)
 			{
@@ -109,7 +110,9 @@ namespace client
 			bool IsReady () const { return m_LeaseSet && !m_LeaseSet->IsExpired () && m_Pool->GetOutboundTunnels ().size () > 0; };
 			std::shared_ptr<const i2p::data::LeaseSet> FindLeaseSet (const i2p::data::IdentHash& ident);
 			bool RequestDestination (const i2p::data::IdentHash& dest, RequestComplete requestComplete = nullptr);
+			bool RequestDestinationWithEncryptedLeaseSet (std::shared_ptr<const i2p::data::IdentityEx> dest, RequestComplete requestComplete = nullptr); 
 			void CancelDestinationRequest (const i2p::data::IdentHash& dest, bool notify = true);
+			void CancelDestinationRequestWithEncryptedLeaseSet (std::shared_ptr<const i2p::data::IdentityEx> dest, bool notify = true);
 
 			// implements GarlicDestination
 			std::shared_ptr<const i2p::data::LocalLeaseSet> GetLeaseSet ();
@@ -144,7 +147,7 @@ namespace client
 			void HandleDatabaseSearchReplyMessage (const uint8_t * buf, size_t len);
 			void HandleDeliveryStatusMessage (std::shared_ptr<I2NPMessage> msg);
 
-			void RequestLeaseSet (const i2p::data::IdentHash& dest, RequestComplete requestComplete);
+			void RequestLeaseSet (const i2p::data::IdentHash& dest, RequestComplete requestComplete, std::shared_ptr<const i2p::data::IdentityEx> requestedIdentity = nullptr);
 			bool SendLeaseSetRequest (const i2p::data::IdentHash& dest, std::shared_ptr<const i2p::data::RouterInfo>  nextFloodfill, std::shared_ptr<LeaseSetRequest> request);
 			void HandleRequestTimoutTimer (const boost::system::error_code& ecode, const i2p::data::IdentHash& dest);
 			void HandleCleanupTimer (const boost::system::error_code& ecode);