revert 5f88d56d96

バグがある(かつすぐに修正できそうにない) & まだレビュー途中で意図せずマージされたため

packages/backend/src/misc/gen-key-pair.ts

@@ -3,14 +3,39 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { genEd25519KeyPair, genRsaKeyPair } from '@misskey-dev/node-http-message-signatures';
+import * as crypto from 'node:crypto';
+import * as util from 'node:util';
 
-export async function genRSAAndEd25519KeyPair(rsaModulusLength = 4096) {
-	const [rsa, ed25519] = await Promise.all([genRsaKeyPair(rsaModulusLength), genEd25519KeyPair()]);
-	return {
-		publicKey: rsa.publicKey,
-		privateKey: rsa.privateKey,
-		ed25519PublicKey: ed25519.publicKey,
-		ed25519PrivateKey: ed25519.privateKey,
-	};
+const generateKeyPair = util.promisify(crypto.generateKeyPair);
+
+export async function genRsaKeyPair(modulusLength = 2048) {
+	return await generateKeyPair('rsa', {
+		modulusLength,
+		publicKeyEncoding: {
+			type: 'spki',
+			format: 'pem',
+		},
+		privateKeyEncoding: {
+			type: 'pkcs8',
+			format: 'pem',
+			cipher: undefined,
+			passphrase: undefined,
+		},
+	});
+}
+
+export async function genEcKeyPair(namedCurve: 'prime256v1' | 'secp384r1' | 'secp521r1' | 'curve25519' = 'prime256v1') {
+	return await generateKeyPair('ec', {
+		namedCurve,
+		publicKeyEncoding: {
+			type: 'spki',
+			format: 'pem',
+		},
+		privateKeyEncoding: {
+			type: 'pkcs8',
+			format: 'pem',
+			cipher: undefined,
+			passphrase: undefined,
+		},
+	});
 }