groups key generation bug fix

WASignalGroup/group_session_builder.js

@@ -1,7 +1,7 @@
 //const utils = require('../../common/utils');
 const SenderKeyDistributionMessage = require('./sender_key_distribution_message');
 
-const keyhelper = require("libsignal/src/keyhelper");
+const keyhelper = require("./keyhelper");
 class GroupSessionBuilder {
   constructor(senderKeyStore) {
     this.senderKeyStore = senderKeyStore;
@@ -21,7 +21,6 @@ class GroupSessionBuilder {
 
   // [{"senderKeyId":1742199468,"senderChainKey":{"iteration":0,"seed":"yxMY9VFQcXEP34olRAcGCtsgx1XoKsHfDIh+1ea4HAQ="},"senderSigningKey":{"public":""}}]
   async create(senderKeyName) {
-    try {
     const senderKeyRecord = await this.senderKeyStore.loadSenderKey(senderKeyName);
     //console.log('GroupSessionBuilder create session', senderKeyName, senderKeyRecord);
 
@@ -42,10 +41,6 @@ class GroupSessionBuilder {
       state.getSenderChainKey().getSeed(),
       state.getSigningKeyPublic()
     );
-    } catch (e) {
-      //console.log(e.stack);
-      throw new Error(e);
-    }
   }
 }
 module.exports = GroupSessionBuilder;

WASignalGroup/keyhelper.js

@@ -0,0 +1,21 @@
+const curve = require('libsignal/src/curve');
+const nodeCrypto = require('crypto');
+
+exports.generateSenderKey = function() {
+    return nodeCrypto.randomBytes(32);
+}
+
+exports.generateSenderKeyId = function() {
+    return nodeCrypto.randomInt(2147483647);
+}
+
+exports.generateSenderSigningKey = function(key) {
+    if (!key) {
+        key = curve.generateKeyPair();
+    }
+
+    return {
+        public: key.pubKey,
+        private: key.privKey,
+    };
+}