...

static/js/modules/crypto/paillier.js

@@ -1,11 +1,9 @@
 import { random2048, generate_prime } from "./random_primes.js";
 import { mod_exp } from "./math.js";
 
-let p, q, pubKey, privKey;
-
-class PubKey {
-    constructor(p, q) {
-        this.n = p * q;
+export class PaillierPubKey {
+    constructor(n) {
+        this.n = n;
         // this.g = this.n + 1n;
     }
 
@@ -23,9 +21,19 @@ class PubKey {
         // Compute g^m r^n from crt
         return (gm * mod_exp(r, this.n, this.n ** 2n)) % this.n ** 2n;
     }
+
+    toJSON() {
+        return {
+            n: "0x" + this.n.toString(16),
+        };
+    }
+
+    static fromJSON(data) {
+        return new PaillierPubKey(BigInt(data.n));
+    }
 }
 
-class PrivKey {
+class PaillierPrivKey {
     constructor(p, q) {
         this.n = p * q;
         this.lambda = (p - 1n) * (q - 1n);
@@ -40,6 +48,8 @@ class PrivKey {
 }
 
 export function generate_keypair() {
+    let p, q, pubKey, privKey;
+
     if (window.sessionStorage.getItem("p") === null) {
         p = generate_prime();
         window.sessionStorage.setItem("p", p);
@@ -54,8 +64,8 @@ export function generate_keypair() {
         q = BigInt(window.sessionStorage.getItem("q"));
     }
 
-    pubKey = new PubKey(p, q);
-    privKey = new PrivKey(p, q);
+    pubKey = new PaillierPubKey(p * q);
+    privKey = new PaillierPrivKey(p, q);
 
     return { pubKey, privKey };
 }

static/js/modules/crypto/rsa.js

@@ -1,8 +1,6 @@
 import { generate_prime } from "./random_primes.js";
 import { mod_exp, mod_inv } from "./math.js";
 
-let p, q, pubKey, privKey;
-
 export class RsaPubKey {
     constructor(n, e) {
         this.n = n;
@@ -37,6 +35,8 @@ class RsaPrivKey {
 }
 
 export function generate_rsa_keypair() {
+    let p, q, pubKey, privKey;
+
     if (window.sessionStorage.getItem("rsa_p") === null) {
         p = generate_prime();
         window.sessionStorage.setItem("rsa_p", p);