Activating Event's check signature

2023-02-14 20:32:35 -05:00
parent f80ba653b2
commit af96f142cd
2 changed files with 19 additions and 0 deletions
@@ -17,6 +17,7 @@ import com.vitorpamplona.amethyst.service.model.RepostEvent
 import com.vitorpamplona.amethyst.service.relays.Client
 import com.vitorpamplona.amethyst.service.relays.Relay
 import com.vitorpamplona.amethyst.service.relays.Subscription
+import com.vitorpamplona.amethyst.service.relays.hasValidSignature
 import java.util.Date
 import java.util.UUID
 import kotlinx.coroutines.CoroutineScope
@@ -48,6 +49,8 @@ abstract class NostrDataSource<T>(val debugName: String) {
  private val clientListener = object : Client.Listener() {
    override fun onEvent(event: Event, subscriptionId: String, relay: Relay) {
      if (subscriptionId in subscriptions.keys) {
+        if (!event.hasValidSignature()) return
+
        val key = "${debugName} ${subscriptionId} ${event.kind}"
        val keyValue = eventCounter.get(key)
        if (keyValue != null) {
@@ -0,0 +1,16 @@
+package com.vitorpamplona.amethyst.service.relays
+
+import fr.acinq.secp256k1.Secp256k1
+import nostr.postr.events.Event
+import nostr.postr.events.generateId
+
+fun Event.hasValidSignature(): Boolean {
+  if (!id.contentEquals(generateId())) {
+    return false
+  }
+  if (!Secp256k1.get().verifySchnorr(sig, id, pubKey)) {
+    return false
+  }
+
+  return true
+}