하나의 공개 키로 여러 계정에 로그인할 수 있도록 구현

src/routes/(fullscreen)/key/generate/service.ts

@@ -1,44 +1,10 @@
+import {
+  generateRSAKeyPair,
+  makeRSAKeyNonextractable,
+  exportRSAKeyToBase64,
+} from "$lib/modules/crypto";
 import { keyPairStore } from "$lib/stores";
 
-type KeyType = "public" | "private";
-
-const generateRSAKeyPair = async () => {
-  const keyPair = await window.crypto.subtle.generateKey(
-    {
-      name: "RSA-OAEP",
-      modulusLength: 4096,
-      publicExponent: new Uint8Array([1, 0, 1]),
-      hash: "SHA-256",
-    } satisfies RsaHashedKeyGenParams,
-    true,
-    ["encrypt", "decrypt"],
-  );
-  return keyPair;
-};
-
-const makeRSAKeyNonextractable = async (key: CryptoKey, type: KeyType) => {
-  const format = type === "public" ? "spki" : "pkcs8";
-  const keyUsage = type === "public" ? "encrypt" : "decrypt";
-  return await window.crypto.subtle.importKey(
-    format,
-    await window.crypto.subtle.exportKey(format, key),
-    {
-      name: "RSA-OAEP",
-      hash: "SHA-256",
-    } satisfies RsaHashedImportParams,
-    false,
-    [keyUsage],
-  );
-};
-
-const exportKeyToBase64 = async (key: CryptoKey, type: KeyType) => {
-  const exportedKey = await window.crypto.subtle.exportKey(
-    type === "public" ? "spki" : "pkcs8",
-    key,
-  );
-  return btoa(String.fromCharCode(...new Uint8Array(exportedKey)));
-};
-
 export const generateKeyPair = async () => {
   const keyPair = await generateRSAKeyPair();
   const privKeySecured = await makeRSAKeyNonextractable(keyPair.privateKey, "private");
@@ -49,7 +15,7 @@ export const generateKeyPair = async () => {
   });
 
   return {
-    pubKeyBase64: await exportKeyToBase64(keyPair.publicKey, "public"),
-    privKeyBase64: await exportKeyToBase64(keyPair.privateKey, "private"),
+    pubKeyBase64: await exportRSAKeyToBase64(keyPair.publicKey, "public"),
+    privKeyBase64: await exportRSAKeyToBase64(keyPair.privateKey, "private"),
   };
 };