error in fromDer from forge.asn1 with certificate .p12 .pfx

Question

I have a problem. I'm developing a program in which I can read .p12 and .pfx files. My code is the following:

const pathSignFile = await uploadFile(signFile, ['p12', 'pfx'], '/signCerts');
const signBufferBinary = fs.readFileSync(pathSignFile, { encoding: 'binary' });
const data = isSignValidity(signBufferBinary, signPassword); 

return res.status(200).json({
        data
});

With some files I can access it, but in others the error lies here:

const asn1 = forge.asn1.fromDer(p12base64);
const p12 = forge.pkcs12.pkcs12FromAsn1(asn1, false, password);
return p12

The result I have is this:

{
    "byteCount": 3891,
    "remaining": 6
}

And status 500.

I tried:

const p12Der = forge.util.decode64(certOrPfx.toString('base64'));
const p12Asn1 = forge.asn1.fromDer(p12Der);

It didn't work.