JavaScriptSolidServer
diff --git a/‎src/chat/chatLogic.js‎
Lines changed: 13 additions & 0 deletions b/‎src/chat/chatLogic.js‎
Lines changed: 13 additions & 0 deletions
diff --git a/‎src/chat/message.js‎
Lines changed: 14 additions & 1 deletion b/‎src/chat/message.js‎
Lines changed: 14 additions & 1 deletion
diff --git a/‎src/chat/signature.ts‎
Lines changed: 5 additions & 12 deletions b/‎src/chat/signature.ts‎
Lines changed: 5 additions & 12 deletions
@@ -9,6 +9,10 @@ import { store, authn } from 'solid-logic'
 import * as ns from '../ns'
 import * as $rdf from 'rdflib' // pull in first avoid cross-refs
 import * as utils from '../utils'
+import { signMsg } from '../signature'
+
+const SEC = 'https://w3id.org/security#' // Proof, VerificationMethod
+const CERT = 'http://www.w3.org/ns/auth/cert#' // PrivatKey, PublicKey
 
 /* The Solid logic for a 'LongChat'
 */
@@ -51,22 +55,31 @@ export class ChatChannel {
 
     const me = authn.currentUser() // If already logged on
 
+    const msg = {}
     if (oldMsg) { // edit message replaces old one
       sts.push($rdf.st(mostRecentVersion(oldMsg), ns.dct('isReplacedBy'), message, chatDocument))
+      // do we need to rebuild oldMsg signaturen ?
       if (deleteIt) {
         sts.push($rdf.st(message, ns.schema('dateDeleted'), dateStamp, chatDocument))
+        msg['dateDeleted'] = dateStamp
       }
     } else { // link new message to channel
       sts.push($rdf.st(this.channel, ns.wf('message'), message, chatDocument))
     }
     sts.push(
       $rdf.st(message, ns.sioc('content'), store.literal(text), chatDocument)
     )
+    msg['content'] = text
+
     sts.push(
       $rdf.st(message, ns.dct('created'), dateStamp, chatDocument)
     )
+    msg['created'] = dateStamp
     if (me) {
       sts.push($rdf.st(message, ns.foaf('maker'), me, chatDocument))
+      msg['maker'] = me
+      // privateKey the cached private key of me, cache should be deleted after a certain time
+      sts.push($rdf.st(message, $rdf.sym(`${SEC}Proof`), $rdf.sym(signMsg(msg, privateKey[me]), chatDocument)))
     }
     try {
       await store.updater.update([], sts)
 
@@ -18,6 +18,7 @@ import * as pad from '../pad'
 import * as style from '../style'
 import * as utils from '../utils'
 import * as widgets from '../widgets'
+import { verifySignature } from '../signature'
 
 const dom = window.document
 const messageBodyStyle = style.messageBodyStyle
@@ -114,7 +115,19 @@ export function renderMessageRow (channelObject, message, fresh, options, userCo
   const date = store.any(message, ns.dct('created'))
   const latestVersion = mostRecentVersion(message)
   const content = store.any(latestVersion, ns.sioc('content'))
-
+  const signature = store.any(message, $rdf.sym(`${SEC}Proof`))
+
+  // verify signature
+  msg= {}
+  msg['id'] = message
+  msg['created'] = created
+  // this is not correct.
+  // If the message has been edited/deleted we must verify the latest message and may be the intermediate ones
+  msg['content'] = content
+  msg['maker'] = creator
+  
+  // pubKey could be store in a cache for all makers
+  if(!verifySignature(signature, msg, pubKey[creator])) throw new Error()
   const originalMessage = originalVersion(message)
   const edited = !message.sameTerm(originalMessage)
 
 
@@ -72,14 +72,7 @@ export function serializeMsg (msg: UnsignedMsg): string {
   /* if (!validateMsg(msg))
     throw new Error("can't serialize message with wrong or missing properties") */
 
-  return JSON.stringify([
-    0,
-    msg.pubkey,
-    msg.created_at,
-    msg.kind,
-    msg.tags,
-    msg.content
-  ])
+  return JSON.stringify(msg)
 }
 
 export function getMsgHash (message: UnsignedMsg): string {
@@ -109,11 +102,11 @@ const isRecord = (obj: unknown): obj is Record<string, unknown> => obj instanceo
   return true
 } */
 
-export function verifySignature (message: Message): boolean {
+export function verifySignature (sig, message: Message, pubKey): boolean {
   return schnorr.verify(
-    message.sig,
-    getMsgHash(message)
-    // message.pubkey
+    sig,
+    getMsgHash(message),
+    pubkey
   )
 }