Apple certificate not reading correctly?

[nyfever007]

Hello.
I've spent. hours to figure this out and hope someone can help me out with this.
I am using Vercel to host my project and every time validateAuthorizationCode is triggered(no matter how i tried to handle certificate ). I tried to

1. add context to vercel env.
2. encode p8 file to .p8.enc to and convert to p8 and read it.
   3 finally, i uploaded p8 file directly to project and read it.(which I will not be doing)
   it returns an error

Error: Invalid character: 
at Base64Encoding.decode (file:///var/task/node_modules/oslo/dist/encoding/base64.js:67:27)
at decodeBase64 (file:///var/task/node_modules/oslo/dist/encoding/base64.js:92:19)
at parsePKCS8PEM (file:///var/task/node_modules/arctic/dist/providers/apple.js:64:12)
at Apple.createClientSecret (file:///var/task/node_modules/arctic/dist/providers/apple.js:50:46)
at Apple.validateAuthorizationCode (file:///var/task/node_modules/arctic/dist/providers/apple.js:25:37)
at handleAppleCallback (file:///vercel/path0/src/controllers/oauth.ts:344:21)
at processTicksAndRejections (node:internal/process/task_queues:95:5)

I've done some research and first, and based on following code I am wondering if upgrade/update is need to this.
https://github.com/pilcrowOnPaper/arctic/blob/main/src/providers/apple.ts

1. decodeBase64 is deprecated. I am wondering if this should be

function decodeBase64(base64: string): Uint8Array {
  return Uint8Array.from(Buffer.from(base64, 'base64'));
}

function isValidBase64(str: string): boolean {
    const base64Pattern = /^[a-zA-Z0-9+/=]*$/;
    return base64Pattern.test(str);
}

function parsePKCS8PEM(pkcs8: string): Uint8Array {
  const base64 = pkcs8
    .replace(/-----BEGIN PRIVATE KEY-----/, '')
    .replace(/-----END PRIVATE KEY-----/, '')
    .replace(/\r?\n|\r/g, '') // Remove all newlines
    .trim();


  // Validate the Base64 string
  if (!isValidBase64(base64)) {
    throw new Error('Invalid Base64 string');
  }

  return decodeBase64(base64);
}

I debugged the project to make sure that p8 file is read correctly.
I also ran parsePKCS8PEM locally to make sure my p8 file is valid base64.

Any idea?

[pilcrowOnPaper]

Yeah adding .replace(/\r?\n|\r/g, '') should fix the issue. Honestly certificate should be Uint8Array but that's breaking change

[nyfever007]

Yeah adding .replace(/\r?\n|\r/g, '') should fix the issue. Honestly certificate should be Uint8Array but that's breaking change

Yup. i created customApple(since I couldn't PR) and tested it and adding that line indeed resolved the issue. Hope you update this.
Thanks!