Add a preliminary way to resolve the calling application.

This will have to be reworked though, as by using the roster only
BApplications can be resolved, as plain cli apps aren't registered with
the registrar.

src/servers/keystore/KeyStoreServer.cpp

@@ -15,6 +15,7 @@
 #include <Entry.h>
 #include <FindDirectory.h>
 #include <Path.h>
+#include <Roster.h>
 #include <String.h>
 
 #include <new>
@@ -477,6 +478,24 @@ KeyStoreServer::_AccessFlagsFor(uint32 command) const
 }
 
 
+status_t
+KeyStoreServer::_ResolveCallingApp(const BMessage& message,
+	app_info& callingAppInfo) const
+{
+	team_id callingTeam = message.ReturnAddress().Team();
+	status_t result = be_roster->GetRunningAppInfo(callingTeam,
+		&callingAppInfo);
+	if (result != B_OK)
+		return result;
+
+	// Do some sanity checks.
+	if (callingAppInfo.team != callingTeam)
+		return B_ERROR;
+
+	return B_OK;
+}
+
+
 Keyring*
 KeyStoreServer::_FindKeyring(const BString& name)
 {

src/servers/keystore/KeyStoreServer.h

@@ -12,6 +12,7 @@
 #include <ObjectList.h>
 
 
+struct app_info;
 class Keyring;
 
 typedef BObjectList<Keyring> KeyringList;
@@ -29,6 +30,8 @@ private:
 		status_t					_WriteKeyStoreDatabase();
 
 		uint32						_AccessFlagsFor(uint32 command) const;
+		status_t					_ResolveCallingApp(const BMessage& message,
+										app_info& callingAppInfo) const;
 
 		Keyring*					_FindKeyring(const BString& name);