Don't accept PNI as ACI in contact sync

ts/services/storageRecordOps.ts

@@ -54,6 +54,7 @@ import {
   toTaggedPni,
 } from '../types/ServiceId';
 import { normalizeAci } from '../util/normalizeAci';
+import { isAciString } from '../util/isAciString';
 import * as Stickers from '../types/Stickers';
 import type {
   StoryDistributionWithMembersType,
@@ -997,6 +998,11 @@ export async function mergeContactRecord(
     return { hasConflict: false, shouldDrop: true, details: ['no uuid'] };
   }
 
+  // Contacts should not have PNI as ACI
+  if (aci && !isAciString(aci)) {
+    return { hasConflict: false, shouldDrop: true, details: ['invalid aci'] };
+  }
+
   if (
     window.storage.user.getOurServiceIdKind(serviceId) !== ServiceIdKind.Unknown
   ) {

ts/textsecure/ContactsParser.ts

@@ -7,6 +7,7 @@ import protobuf from '../protobuf/wrap';
 
 import { SignalService as Proto } from '../protobuf';
 import { normalizeAci } from '../util/normalizeAci';
+import { isAciString } from '../util/isAciString';
 import { DurationInSeconds } from '../util/durations';
 import * as Errors from '../types/errors';
 import * as log from '../logging/log';
@@ -115,6 +116,7 @@ export class ContactBuffer extends ParserBase<
   }
 
   public override next(): ModifiedContactDetails | undefined {
+    while (this.reader.pos < this.reader.len) {
       const proto = this.decodeDelimited();
       if (!proto) {
         return undefined;
@@ -126,6 +128,13 @@ export class ContactBuffer extends ParserBase<
 
       const { verified } = proto;
 
+      if (
+        !isAciString(proto.aci) ||
+        (verified?.destinationAci && !isAciString(verified.destinationAci))
+      ) {
+        continue;
+      }
+
       return {
         ...proto,
 
@@ -144,4 +153,7 @@ export class ContactBuffer extends ParserBase<
         aci: normalizeAci(proto.aci, 'ContactBuffer.aci'),
       };
     }
+
+    return undefined;
+  }
 }

ts/util/normalizeAci.ts

@@ -5,6 +5,7 @@ import type { AciString } from '../types/ServiceId';
 import type { LoggerType } from '../types/Logging';
 import * as log from '../logging/log';
 import { isAciString } from './isAciString';
+import { strictAssert } from './assert';
 
 export function normalizeAci(
   rawAci: string,
@@ -28,6 +29,7 @@ export function normalizeAci(
   }
 
   const result = rawAci.toLowerCase();
+  strictAssert(!result.startsWith('pni:'), 'ACI should not start with PNI:');
 
   if (!isAciString(result)) {
     logger.warn(