From 83e2d779f2a2aef5e5dd50e33a348b2e9e898672 Mon Sep 17 00:00:00 2001
From: zefie <zefie@zefie.net>
Date: Tue, 29 Nov 2022 16:45:18 -0500
Subject: [PATCH] generate proper ssids

---
 .../ServiceVault/http_pc/viewergen/index.js   | 37 ++++++---
 zefie_wtvp_minisrv/includes/WTVShared.js      | 77 +++++++++++++++++++
 2 files changed, 104 insertions(+), 10 deletions(-)

diff --git a/zefie_wtvp_minisrv/ServiceVault/http_pc/viewergen/index.js b/zefie_wtvp_minisrv/ServiceVault/http_pc/viewergen/index.js
index 6eec65fb..9dc9bb69 100644
--- a/zefie_wtvp_minisrv/ServiceVault/http_pc/viewergen/index.js
+++ b/zefie_wtvp_minisrv/ServiceVault/http_pc/viewergen/index.js
@@ -291,14 +291,15 @@ function patchBinary(patchDataObject) {
     return patched_file;
 }
 
+
 function generateSSID() {
-    var ssid_template = "91xxxY0xx0b002xx";
+    var ssid_template = "91xxxxxxaeb002";
     var ssid = ssid_template;
     while (ssid.indexOf("x") != -1) {
+        // random hex char from 0-F
         ssid = ssid.replace("x", Math.floor(Math.random() * 16).toString(16))
-    }
-    ssid = ssid.replace("Y", Math.floor(Math.random() * 7));
-    return ssid;
+    }    
+    return ssid + wtvshared.getSSIDCRC(ssid);
 }
 
 function buildProfile(build) {
@@ -517,15 +518,31 @@ window.onload = function() {
     updateFeatureBits();
 }
 
+function getSSIDCRC(ssid) {
+    let crc = 0;
+    var ssid = ssid.substr(0, 14);
+    for (let i = 0; i < ssid.length; i += 2) {
+        let inbyte = parseInt(ssid.substring(i, i+2), 16);
+		for (let ii = 8; ii > 0; ii--) {
+		    let mix = (crc ^ inbyte) & 0x01;
+			crc >>= 1;
+			if (mix != 0) crc ^= 0x8C;
+			inbyte >>= 1;
+		}
+
+		if(isNaN(crc)) crc = 0;
+    }
+    return crc.toString(16);
+}
+
 function generateSSID() {
-    var ssidForm = document.getElementById('client_ssid');
-    var ssid_template = "91xxxY0xx0b002xx";
+    var ssid_template = "91xxxxxxaeb002";
     var ssid = ssid_template;
     while (ssid.indexOf("x") != -1) {
-        ssid = ssid.replace("x",Math.floor(Math.random() * 16).toString(16))
-    }
-    ssid = ssid.replace("Y", Math.floor(Math.random() * 7));
-    ssidForm.value = ssid;
+        // random hex char from 0-F
+        ssid = ssid.replace("x", Math.floor(Math.random() * 16).toString(16))
+    }    
+    document.getElementById('client_ssid').value = ssid + getSSIDCRC(ssid);
 }
 
 function validateForm() {
diff --git a/zefie_wtvp_minisrv/includes/WTVShared.js b/zefie_wtvp_minisrv/includes/WTVShared.js
index a4edae3a..a3947bb7 100644
--- a/zefie_wtvp_minisrv/includes/WTVShared.js
+++ b/zefie_wtvp_minisrv/includes/WTVShared.js
@@ -41,6 +41,25 @@ class WTVShared {
         }
     }
 
+    getSSIDCRC(ssid) {
+        let crc = 0;
+        var ssid = ssid.substr(0, 14);
+
+        for (let i = 0; i < ssid.length; i += 2) {
+            let inbyte = parseInt(ssid.substring(i, i + 2), 16);
+            for (let ii = 8; ii > 0; ii--) {
+                let mix = (crc ^ inbyte) & 0x01;
+                crc >>= 1;
+                if (mix != 0) crc ^= 0x8C;
+                inbyte >>= 1;
+            }
+
+            if (isNaN(crc)) crc = 0;
+        }
+
+        return crc.toString(16);
+    }
+
     atob(a) {
         const CryptoJS = require('crypto-js');
         const enc = CryptoJS.enc.Base64.parse(a);
@@ -364,6 +383,64 @@ class WTVShared {
         }
     }
 
+    parseSSID(ssid) {
+        var ssid_obj = {};
+        switch (ssid.substring(0, 2)) {
+            case "01":
+                ssid_obj.boxType = "Internal";
+                break;
+            case "81":
+                ssid_obj.boxType = "Retail";
+                break;
+            case "91":
+                // not a definitive way to detect a viewer
+                ssid_obj.boxType = "Viewer";
+                break;
+        }
+        ssid_obj.unique_id = ssid.substring(2, 8);
+        switch (ssid.substring(10, 14).toUpperCase()) {
+            case "B002":                
+                ssid_obj.region = "US/Canada";
+                break;
+            case "B102":
+                ssid_obj.region = "Japan";
+                break;
+        }
+
+        switch (ssid.substring(8, 10).toUpperCase()) {
+            case "00":
+                if (ssid_obj.region == "Japan") ssid_obj.manufacturer = "Panasonic";
+                else ssid_obj.manufacturer = "Sony";
+                break;
+            case "10":
+            case "50":
+                ssid_obj.manufacturer = "Philips";
+                break;
+            case "40":
+                ssid_obj.manufacturer = "Mitsubishi";
+                break;
+            case "70":
+                ssid_obj.manufacturer = "Samsung";
+                break;
+            case "80":
+                ssid_obj.manufacturer = "EchoStar";
+                break;
+            case "90":
+                ssid_obj.manufacturer = "RCA";
+                break;
+            case "AE":
+                ssid_obj.manufacturer = "zefie & MattMan69";
+                break;
+        }
+        ssid_obj.crc = ssid.substring(14)
+        return ssid_obj;
+    }
+
+    getManufacturer(ssid) {
+        return parseSSID(ssid).manufacturer || null;
+    }
+
+
     moveObjectElement(currentKey, afterKey, obj, caseInsensitive = false) {
         var result = {};
         if (caseInsensitive) {