refactoring

Resolve #7779

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

@@ -0,0 +1,36 @@
+import * as crypto from 'crypto';
+import * as util from 'util';
+
+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
+		}
+	});
+}