import * as crypto from "crypto";

import { assertRequired } from "./utility";

export const keyToPEM = (

key: string | Buffer

): typeof key extends string | Buffer ? string | Buffer : Error => {

key = assertRequired(key, "key is required");

if (typeof key !== "string") return key;

if (key.split(/\r?\n/).length !== 1) return key;

const matchedKey = key.match(/.{1,64}/g);

if (matchedKey) {

const wrappedKey = [

"-----BEGIN PRIVATE KEY-----",

...matchedKey,

"-----END PRIVATE KEY-----",

"",

].join("\n");

return wrappedKey;

}

throw new Error("Invalid key");

};

export const certToPEM = (cert: string): string => {

cert = cert.match(/.{1,64}/g)!.join("\n");

if (cert.indexOf("-BEGIN CERTIFICATE-") === -1) cert = "-----BEGIN CERTIFICATE-----\n" + cert;

if (cert.indexOf("-END CERTIFICATE-") === -1) cert = cert + "\n-----END CERTIFICATE-----\n";

return cert;

};

export const generateUniqueId = (): string => {

return "_" + crypto.randomBytes(10).toString("hex");

};

export const removeCertPEMHeaderAndFooter = (certificate: string): string => {

certificate = certificate.replace(/-+BEGIN CERTIFICATE-+\r?\n?/, "");

certificate = certificate.replace(/-+END CERTIFICATE-+\r?\n?/, "");

certificate = certificate.replace(/\r\n/g, "\n");

return certificate;

};