OAuth2\Helper

Complexity

Total Complexity

6

Size/Duplication

Total Lines	55
Duplicated Lines	0 %

Importance

Changes

0

5 Methods

Rating	Name	Duplication	Size	Complexity
A	pemToInline()	0	5	1
A	containsNotAsciiChar()	0	3	1
A	certToArray()	0	9	1
A	generateRSAKeys()	0	17	1
A	generateToken()	0	7	2

<?php
/**
 * Created by PhpStorm.
 * User: Alexandre
 * Date: 10/03/2018
 * Time: 15:59
 */

namespace OAuth2;


abstract class Helper
{
    const CHARS = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
    const LENGTH = 22;

    public static function containsNotAsciiChar(string $string)
    {
        return preg_match('/[^\x20-\x7e]/', $string);
    }

    public static function generateToken($length = self::LENGTH)
    {
        $token = '';
        for ($i = 0; $i < $length; ++$i) {
            $token .= self::CHARS[random_int(0, strlen(self::CHARS) - 1)];
        }
        return $token;
    }

    public static function pemToInline($pem) {
        $pem = str_replace('-----BEGIN PUBLIC KEY-----', '', $pem);
        $pem = str_replace('-----END PUBLIC KEY-----', '', $pem);
        $pem = str_replace("\n", '', $pem);
        return $pem;
    }

    public static function certToArray($cert) {
        return [
            'kty' => 'RSA',
            'alg' => 'RSA256',
            'use' => 'sig',
            'kid' => $cert->getKid(),
            'n' => $cert->getN(),
            'e' => $cert->getE(),
            'x5c' => self::pemToInline($cert->getPublicKey())
        ];
    }

    public static function generateRSAKeys() {
        $config = array(
            "digest_alg" => "sha512",
            "private_key_bits" => 4096,
            "private_key_type" => OPENSSL_KEYTYPE_RSA,
        );
        // Create the private and public key
        $res = openssl_pkey_new($config);

        // Extract the private key from $res to $privKey
        openssl_pkey_export($res, $privKey);

        // Extract the public key from $res to $pubKey
        $details = openssl_pkey_get_details($res);

        $pubKey = $details["key"];
        return ['privKey' => $privKey, 'pubKey' => $pubKey, 'rsa' => $details['rsa']];
    }
}