send/recv PGP public key and short invite

libretroshare/src/friend_server/fsclient.cc

@@ -33,10 +33,20 @@ bool FsClient::requestFriends(const std::string& address,uint16_t port,uint32_t
     RsFriendServerClientPublishItem *pitem = new RsFriendServerClientPublishItem();
 
     pitem->n_requested_friends = reqs;
-    pitem->long_invite = rsPeers->GetRetroshareInvite();
+
+    std::string pgp_base64_string,pgp_base64_checksum,short_invite;
+    rsPeers->GetPGPBase64StringAndCheckSum(rsPeers->getGPGOwnId(),pgp_base64_string,pgp_base64_checksum);
+
+    if(!rsPeers->getShortInvite(short_invite,RsPeerId(),RetroshareInviteFlags::RADIX_FORMAT | RetroshareInviteFlags::DNS))
+    {
+        RsErr() << "Cannot request own short invite! Something's very wrong." ;
+        return false;
+    }
+
+    pitem->pgp_public_key_b64 = pgp_base64_string;
+    pitem->short_invite = short_invite;
 
     std::list<RsItem*> response;
-
     sendItem(address,port,pitem,response);
 
     // now decode the response

libretroshare/src/friend_server/fsitem.h

@@ -26,6 +26,7 @@
 #include "serialiser/rsserializer.h"
 
 #include "rsitems/rsitem.h"
+#include "serialiser/rstlvbinary.h"
 #include "rsitems/rsserviceids.h"
 #include "rsitems/itempriorities.h"
 
@@ -53,18 +54,21 @@ public:
     void serial_process(RsGenericSerializer::SerializeJob j,RsGenericSerializer::SerializeContext& ctx) override
     {
         RS_SERIAL_PROCESS(n_requested_friends);
-        RS_SERIAL_PROCESS(long_invite);
+        RS_SERIAL_PROCESS(short_invite);
+        RS_SERIAL_PROCESS(pgp_public_key_b64);
     }
     virtual void clear()  override
     {
-        long_invite = std::string();
+        pgp_public_key_b64.clear();
+        short_invite.clear();
         n_requested_friends=0;
     }
 
     // specific members for that item
 
     uint32_t    n_requested_friends;
-    std::string long_invite;
+    std::string short_invite;
+    std::string pgp_public_key_b64;
 };
 
 class RsFriendServerClientRemoveItem: public RsFriendServerItem

retroshare-friendserver/src/friendserver.cc

@@ -1,4 +1,8 @@
 #include "util/rsdebug.h"
+#include "util/rsprint.h"
+#include "util/rsdir.h"
+#include "util/rsbase64.h"
+#include "util/radix64.h"
 
 #include "friendserver.h"
 #include "friend_server/fsitem.h"
@@ -58,9 +62,68 @@ void FriendServer::threadTick()
 
 void FriendServer::handleClientPublish(const RsFriendServerClientPublishItem *item)
 {
-    RsDbg() << "Received a client publish item from " << item->PeerId() << ":" << *item ;
+    try
+    {
+        RsDbg() << "Received a client publish item from " << item->PeerId() ;
+        RsDbg() << *item ;
 
-    // Respond with a list of potential friends
+        // First of all, read PGP key and short invites, parse them, and check that they contain the same information
+
+        RsDbg() << "  Checking item data...";
+
+        std::string error_string;
+        RsPgpId pgp_id ;
+        std::vector<uint8_t> key_binary_data ;
+
+        key_binary_data = Radix64::decode(item->pgp_public_key_b64);
+
+        if(key_binary_data.empty())
+            throw std::runtime_error("  Cannot decode client pgp public key: \"" + item->pgp_public_key_b64 + "\". Wrong format??");
+//        if(!RsBase64::decode(item->pgp_public_key_b64,key_binary_data))
+//            throw std::runtime_error("  Cannot decode client pgp public key: \"" + item->pgp_public_key_b64 + "\". Wrong format??");
+
+        RsDbg() << "    Public key radix is fine." ;
+
+        if(!mPgpHandler->LoadCertificateFromBinaryData(key_binary_data.data(),key_binary_data.size(), pgp_id, error_string))
+            throw std::runtime_error("Cannot load client's pgp public key into keyring: " + error_string) ;
+
+        RsDbg() << "    Public key added to keyring.";
+
+        RsPeerDetails shortInviteDetails;
+        uint32_t errorCode = 0;
+
+        if(item->short_invite.empty() || !rsPeers->parseShortInvite(item->short_invite, shortInviteDetails,errorCode ))
+            throw std::runtime_error("Could not parse short certificate. Error = " + RsUtil::NumberToString(errorCode));
+
+        RsDbg() << "    Short invite is fine. PGP fingerprint: " << shortInviteDetails.fpr ;
+
+        RsPgpFingerprint fpr_test;
+        if(!mPgpHandler->getKeyFingerprint(pgp_id,fpr_test))
+            throw std::runtime_error("Cannot get fingerprint from keyring for client public key. Something's really wrong.") ;
+
+        if(fpr_test != shortInviteDetails.fpr)
+            throw std::runtime_error("Cannot get fingerprint from keyring for client public key. Something's really wrong.") ;
+
+        RsDbg() << "    Short invite PGP fingerprint matches the public key fingerprint." ;
+
+        // Check the item's data signature
+
+        // All good.
+#warning TODO
+
+        // Store/update the peer info
+
+        auto& pi(mCurrentClientPeers[shortInviteDetails.id]);
+
+        pi.short_certificate = item->short_invite;
+        pi.last_connection_TS = time(nullptr);
+
+        // Respond with a list of potential friends
+    }
+    catch(std::exception& e)
+    {
+        RsErr() << e.what() ;
+    }
 
     // Close client connection from server side, to tell the client that nothing more is coming.
 
@@ -68,6 +131,7 @@ void FriendServer::handleClientPublish(const RsFriendServerClientPublishItem *it
 
     mni->closeConnection(item->PeerId());
 }
+
 void FriendServer::handleClientRemove(const RsFriendServerClientRemoveItem *item)
 {
     RsDbg() << "Received a client remove item:" << *item ;
@@ -76,6 +140,16 @@ FriendServer::FriendServer(const std::string& base_dir)
 {
     RsDbg() << "Creating friend server." ;
     mBaseDirectory = base_dir;
+
+    // Create a PGP Handler
+
+    std::string pgp_public_keyring_path  = RsDirUtil::makePath(base_dir,"pgp_public_keyring") ;
+    std::string pgp_lock_path            = RsDirUtil::makePath(base_dir,"pgp_lock") ;
+
+    std::string pgp_private_keyring_path = RsDirUtil::makePath(base_dir,"pgp_private_keyring") ;	// not used.
+    std::string pgp_trustdb_path         = RsDirUtil::makePath(base_dir,"pgp_trustdb") ;	        // not used.
+
+    mPgpHandler = new PGPHandler(pgp_public_keyring_path,pgp_private_keyring_path,pgp_trustdb_path,pgp_lock_path);
 }
 
 void FriendServer::run()

retroshare-friendserver/src/friendserver.h

@@ -23,6 +23,7 @@
 
 #include "util/rsthreads.h"
 #include "pqi/pqistreamer.h"
+#include "pgp/pgphandler.h"
 
 #include "network.h"
 
@@ -57,6 +58,7 @@ private:
     // Local members
 
     FsNetworkInterface *mni;
+    PGPHandler *mPgpHandler;
 
     std::string mBaseDirectory;
 

retroshare-friendserver/src/retroshare-friendserver.cc

@@ -20,6 +20,7 @@
  */
 
 #include "util/stacktrace.h"
+#include "util/rsdir.h"
 #include "util/argstream.h"
 #include "util/rstime.h"
 #include "util/rsdebug.h"
@@ -43,15 +44,22 @@ int main(int argc, char* argv[])
 	//RsInit::InitRsConfig();
 	//RsControl::earlyInitNotificationSystem();
 
-	std::string base_directory;
+    std::string base_directory = "FSData";
 
 	argstream as(argc,argv);
 
-	as >> parameter( 'c',"base-dir", base_directory, "directory", "Set base directory.", false )
+    as >> parameter( 'c',"base-dir", base_directory, "set base directory to store data files (keys, etc)", false )
 	   >> help( 'h', "help", "Display this Help" );
 
 	as.defaultErrorHandling(true, true);
 
+    // Create the base directory if needed
+
+    if(!RsDirUtil::checkCreateDirectory(base_directory))
+    {
+        RsErr() << "Cannot create base directory \"" << base_directory << "\". Check permissions, paths, etc." ;
+        return 1;
+    }
     // Now start the real thing.
 
     FriendServer fs(base_directory);