refactor: return immediately

Author: starkfire

Diff for: src/aes/generateAESKey.ts

@@ -4,10 +4,8 @@ export default async function generateAESKey(alg: string, extractable: boolean,
     const length = parseInt(alg.slice(1, 4), 10);
     const isGCM = (alg.slice(-3) == 'GCM' || alg.slice(-5, 3) == 'GCM');
 
-    let key = await subtle.generateKey({
+    return await subtle.generateKey({
         name: (isGCM) ? 'AES-GCM' : 'AES-KW',
         length
     }, extractable, keyUsages);
-
-    return key;
 }

Diff for: src/ecdsa/generateECDSAKey.ts

@@ -3,10 +3,8 @@ const { subtle } = require('node:crypto').webcrypto;
 import getCurve from "./getCurve";
 
 export default async function generateECDSAKey(alg: string, extractable: boolean) {
-    let key = await subtle.generateKey({
+    return await subtle.generateKey({
         name: 'ECDSA',
         namedCurve: getCurve(alg)
     }, extractable, ['sign', 'verify']);
-
-    return key;
 }

Diff for: src/hmac/generateHMACKey.ts

@@ -5,11 +5,9 @@ export default async function generateHMACKey(alg: string, extractable: boolean,
 
     let hash = { name: `SHA-${length}` };
 
-    let key = await subtle.generateKey({
+    return await subtle.generateKey({
         name: 'HMAC',
         hash,
         length
     }, extractable, keyUsages);
-
-    return key;
 }

Diff for: src/rsa/generateRSAKey.ts

@@ -3,7 +3,7 @@ const { subtle } = require('node:crypto').webcrypto;
 import getRSAType from "./getRSAType";
 
 function getHashType(alg: string) {
-    const length = parseInt(alg.substr(-3), 10);
+    const length = parseInt(alg.slice(-3), 10);
 
     if (isNaN(length)) return 'SHA-1';
 
@@ -28,12 +28,10 @@ export default async function generateRSAKey(alg: string, extractable: boolean)
 
     const keyUsages = getKeyUsages(RSAType);
 
-    let key = await subtle.generateKey({
+    return await subtle.generateKey({
         name: RSAType,
         modulusLength: 2048,
         publicExponent: new Uint8Array([1, 0, 1]),
         hash: getHashType(alg),
     }, extractable, keyUsages);
-
-    return key;
 }