Change the RSA Signer to throw an error instead of returning a Boolean

Author: AJCStriker

package.json

@@ -1,6 +1,6 @@
 {
   "name": "strontium",
-  "version": "2.6.4",
+  "version": "2.6.5",
   "description": "Strontium is a TypeScript toolkit for High Performance API servers built for Production not Projects.",
   "main": "lib/src/index.js",
   "types": "lib/src/index.d.ts",

src/cryptography/drivers/node/RSASHA256Signer.ts

@@ -1,3 +1,4 @@
+import { InvalidSignatureError } from "../../../errors/InvalidSignatureError";
 import { AsymmetricSigner } from "../../abstract/AsymmetricSigner"
 
 // Typescript Types not available for JWT - Proceed with caution
@@ -12,6 +13,13 @@ export class RSASHA256Signer extends AsymmetricSigner {
     }
 
     public async verify(plaintext: Buffer, signature: Buffer): Promise<Buffer> {
-        return RS256.verify(plaintext, signature, this.publicKey)
+        let isValid = await RS256.verify(plaintext, signature, this.publicKey)
+
+        if (!isValid) {
+            throw new InvalidSignatureError()
+        }
+
+        // Spawn an empty buffer to fulfill the return type
+        return Buffer.from([])
     }
 }

src/errors/InvalidSignatureError.ts

@@ -0,0 +1,12 @@
+import { StrontiumError } from "./StrontiumError"
+
+/**
+ * An InvalidSignatureError is thrown when a Cryptographic signature does not match.
+ */
+export class InvalidSignatureError extends StrontiumError {
+  constructor() {
+    super(
+      `The signature provided was not valid.`
+    )
+  }
+}