dhtrunner: allow to find certificates by PkId

include/opendht/dhtrunner.h

@@ -384,6 +384,8 @@ public:
     // securedht methods
 
     void findCertificate(InfoHash hash, std::function<void(const std::shared_ptr<crypto::Certificate>&)>);
+    void findCertificate(PkId hash, std::function<void(const std::shared_ptr<crypto::Certificate>&)>);
+
     void registerCertificate(const std::shared_ptr<crypto::Certificate>& cert);
     void setLocalCertificateStore(CertificateStoreQuery&& query_method);
 

src/dhtrunner.cpp

@@ -1079,6 +1079,23 @@ DhtRunner::findCertificate(InfoHash hash, std::function<void(const Sp<crypto::Ce
     cv.notify_all();
 }
 
+void DhtRunner::findCertificate(PkId hash, std::function<void(const std::shared_ptr<crypto::Certificate>&)> cb)
+{
+    std::unique_lock<std::mutex> lck(storage_mtx);
+    if (running != State::Running) {
+        lck.unlock();
+        return;
+    }
+    ongoing_ops++;
+    pending_ops.emplace([this, hash, cb = std::move(cb)] (SecureDht& dht) {
+        dht.findCertificate(hash, [this, cb = std::move(cb)](const Sp<crypto::Certificate>& crt){
+            cb(crt);
+            opEnded();
+        });
+    });
+    cv.notify_all();
+}
+
 void
 DhtRunner::resetDht()
 {