fix: secret expose projective point intead of affine for marshalling

Author: CluEleSsUK

package.json

@@ -1,6 +1,6 @@
 {
   "name": "identity-based-encryption-bn254",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "source": "src/index.ts",
   "main": "./dist/cjs/index.cjs",
   "module": "./dist/esm/index.mjs",

src/ibe.ts

@@ -13,7 +13,7 @@ export class IBE {
 
     createDecryptionKey(secretKey: SecretKey | Uint8Array, identity: Identity): DecryptionKey {
         const sk = secretKey instanceof Uint8Array ? bn254.fields.Fr.fromBytes(secretKey) : secretKey.sk
-        return {k: identity.i.multiply(sk).toAffine()}
+        return {k: identity.i.multiply(sk)}
     }
 
     encrypt(message: Uint8Array, identity: Identity, publicKey: PublicKey) {
@@ -23,7 +23,7 @@ export class IBE {
     decrypt(ciphertext: Ciphertext, decryptionKey: DecryptionKey | Uint8Array): Uint8Array {
         try {
             const key = decryptionKey instanceof Uint8Array ? bn254.G1.ProjectivePoint.fromHex(decryptionKey) : decryptionKey.k
-            return decrypt(ciphertext, key, this.opts)
+            return decrypt(ciphertext, key.toAffine(), this.opts)
         } catch (err) {
             throw new Error("failed to decrypt the ciphertext - did you use the correct key?")
         }
@@ -60,5 +60,5 @@ export type PublicKey = {
 }
 
 export type DecryptionKey = {
-    k: G1
+    k: ProjPointType<Fp>
 }

src/serde.ts

@@ -1,6 +1,8 @@
 import * as asn1js from "asn1js"
 import {bn254} from "@kevincharm/noble-bn254-drand"
-import {Ciphertext} from "./crypto"
+import {Ciphertext, G2} from "./crypto"
+import {ProjPointType} from "@noble/curves/esm/abstract/weierstrass"
+import {Fp} from "@noble/curves/esm/abstract/tower"
 
 /**
  * Serialize Ciphertext to ASN.1 structure