From d3e309c1e391e6b32552e5ced134236352614d40 Mon Sep 17 00:00:00 2001
From: jude <jude@jellywx.com>
Date: Thu, 13 Apr 2023 16:33:32 +0100
Subject: [PATCH] ....

---
 static/js/modules/crypto/paillier.js  | 20 ++++++++++++++++-
 static/js/modules/interface/proofs.js | 31 ++++++++++++++++++++-------
 2 files changed, 42 insertions(+), 9 deletions(-)

diff --git a/static/js/modules/crypto/paillier.js b/static/js/modules/crypto/paillier.js
index 256112a..6e7f401 100644
--- a/static/js/modules/crypto/paillier.js
+++ b/static/js/modules/crypto/paillier.js
@@ -5,7 +5,16 @@ const PAILLIER = 0;
 const JURIK = 1;
 
 class Ciphertext {
-    constructor(key, plainText, r) {
+    constructor(key, plainText, r, set) {
+        if (set !== undefined) {
+            this.pubKey = key;
+            this.plainText = plainText;
+
+            this.readOnly = false;
+
+            return;
+        }
+
         if (r === undefined) {
             // Use the optimised form using Jacobi classes
             r = cryptoRandom();
@@ -107,6 +116,15 @@ class Ciphertext {
     asReadOnlyCiphertext() {
         return new ReadOnlyCiphertext(this.pubKey, this.cipherText);
     }
+
+    clone() {
+        let c = new Ciphertext(this.pubKey, this.plainText, 0, true);
+        c.cipherText = this.cipherText;
+        c.r = this.r;
+        c.mode = this.mode;
+
+        return c;
+    }
 }
 
 class ValueProofSessionProver {
diff --git a/static/js/modules/interface/proofs.js b/static/js/modules/interface/proofs.js
index 93f24b7..bf6df4e 100644
--- a/static/js/modules/interface/proofs.js
+++ b/static/js/modules/interface/proofs.js
@@ -4,6 +4,7 @@
  * Only works on lists up to 255 elements.
  */
 function cryptoShuffle(l) {
+    let out = [];
     for (let i = l.length - 1; i > 0; i--) {
         let value = new Uint8Array([0]);
         crypto.getRandomValues(value);
@@ -11,12 +12,13 @@ function cryptoShuffle(l) {
             crypto.getRandomValues(value);
         }
 
-        let temp = l[i];
-        l[i] = l[value[0]];
-        l[value[0]] = temp;
+        let v = l.splice(value[0], 1);
+        out.push(v[0]);
     }
 
-    return l;
+    out.push(l[0]);
+
+    return out;
 }
 
 window.cryptoShuffle = cryptoShuffle;
@@ -25,14 +27,27 @@ function proveRegions(regions) {
     // Construct prover coins
     let coins = [];
 
-    let regionNames = Object.keys(regions.keys());
-    for (let x = 0; x < 20; x++) {
-        let psi = cryptoShuffle(regionNames).join("");
+    let regionNames = Object.keys(regions);
+    for (let x = 0; x < 40; x++) {
+        let psi = cryptoShuffle(structuredClone(regionNames)).join("");
+        let newRegions = structuredClone(regions);
+        // rearrange keys
+        for (let index = 0; index < regionNames.length; index++) {
+            let c = regions[psi[index]].clone();
+            // re-blind
+            c.update(c.pubKey.encrypt(0n));
+            newRegions[regionNames[index]] = c.toString();
+        }
+        coins.push(newRegions);
     }
 
     // Construct verifier coins
     let hasher = new jsSHA("SHA3-256", "TEXT");
-    hasher.update(JSON.stringify(regions));
+    hasher.update(JSON.stringify(coins));
+
+    console.log(hasher.getHash("UINT8ARRAY"));
 
     // Construct prover proofs
 }
+
+window.proveRegions = proveRegions;