Firma de tokens jwt propios para las solicitues

packages/shared/domain/JWT.ts

@@ -1,3 +1,5 @@
+import { sign } from "node:crypto"
+
 export type JWTHeader = {
   alg: string,
   typ: string,
@@ -42,6 +44,20 @@ export type JWT<T> = {
   signature: JWTSignature
 }
 
+// todo pasar a la clase JWT
+function signJWT(args: {
+  algorythm: "sha256" | string,
+  data: string,
+  privateKey: string
+}) {
+  const signature = sign(
+    args.algorythm,
+    Buffer.from(args.data),
+    args.privateKey
+  )
+  return signature
+}
+
 export class JWTToken<T> {
 
   public rawToken: string
@@ -54,6 +70,37 @@ export class JWTToken<T> {
     this.decodedPayload = this.decodePayload()
   }
 
+  public static fromParts<T>(args: {
+    header: JWTHeader,
+    payload?: JWTPayload<T>,
+    sigantureData?: {
+      privateKey: string,
+      algorythm: string
+    }
+  }) {
+    const strHeader = JSON.stringify(args.header)
+    const base64Header = Buffer.from(strHeader).toString("base64url")
+    let msg = base64Header
+
+    if (args.payload != undefined) {
+      const strPayload = JSON.stringify(args.payload)
+      const base64payload = Buffer.from(strPayload).toString("base64url")
+      msg += ("." + base64payload)
+    }
+
+    if (args.sigantureData != undefined) {
+      const base64signature = signJWT({
+        algorythm: args.sigantureData.algorythm,
+        privateKey: args.sigantureData.privateKey,
+        data: msg
+      }).toString("base64url")
+      msg += ("." + base64signature)
+    }
+    console.log("JWT", msg)
+
+
+  }
+
   private decodePayload(): JWTPayload<T> {
     if (this.rawToken == undefined) throw new Error("La clase no tiene un token definido")
     const rawTokenPayload = this.rawToken.split(".")[1]