FM / Crypto

/home/techb158/exp.abdallabala.com/vendor/symfony/mime/Crypto/

/home/techb158/exp.abdallabala.com/vendor/symfony/mime/Crypto

Name	Size	Mode	Actions
DkimOptions.php	1793	0644	edit dl rm
DkimSigner.php	7877	0644	edit dl rm
SMime.php	3266	0644	edit dl rm
SMimeEncrypter.php	2208	0644	edit dl rm
SMimeSigner.php	2695	0644	edit dl rm

Edit: /home/techb158/exp.abdallabala.com/vendor/symfony/mime/Crypto/DkimSigner.php (7877B)

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Mime\Crypto;

use Symfony\Component\Mime\Exception\InvalidArgumentException;
use Symfony\Component\Mime\Exception\RuntimeException;
use Symfony\Component\Mime\Header\UnstructuredHeader;
use Symfony\Component\Mime\Message;
use Symfony\Component\Mime\Part\AbstractPart;

/**
 * @author Fabien Potencier <fabien@symfony.com>
 *
 * RFC 6376 and 8301
 */
final class DkimSigner
{
    public const CANON_SIMPLE = 'simple';
    public const CANON_RELAXED = 'relaxed';

public const ALGO_SHA256 = 'rsa-sha256';
    public const ALGO_ED25519 = 'ed25519-sha256'; // RFC 8463

private $key;
    private $domainName;
    private $selector;
    private $defaultOptions;

/**
     * @param string $pk         The private key as a string or the path to the file containing the private key, should be prefixed with file:// (in PEM format)
     * @param string $passphrase A passphrase of the private key (if any)
     */
    public function __construct(string $pk, string $domainName, string $selector, array $defaultOptions = [], string $passphrase = '')
    {
        if (!\extension_loaded('openssl')) {
            throw new \LogicException('PHP extension "openssl" is required to use DKIM.');
        }
        if (!$this->key = openssl_pkey_get_private($pk, $passphrase)) {
            throw new InvalidArgumentException('Unable to load DKIM private key: '.openssl_error_string());
        }

$this->domainName = $domainName;
        $this->selector = $selector;
        $this->defaultOptions = $defaultOptions + [
            'algorithm' => self::ALGO_SHA256,
            'signature_expiration_delay' => 0,
            'body_max_length' => \PHP_INT_MAX,
            'body_show_length' => false,
            'header_canon' => self::CANON_RELAXED,
            'body_canon' => self::CANON_RELAXED,
            'headers_to_ignore' => [],
        ];
    }

public function sign(Message $message, array $options = []): Message
    {
        $options += $this->defaultOptions;
        if (!\in_array($options['algorithm'], [self::ALGO_SHA256, self::ALGO_ED25519], true)) {
            throw new InvalidArgumentException('Invalid DKIM signing algorithm "%s".', $options['algorithm']);
        }
        $headersToIgnore['return-path'] = true;
        foreach ($options['headers_to_ignore'] as $name) {
            $headersToIgnore[strtolower($name)] = true;
        }
        unset($headersToIgnore['from']);
        $signedHeaderNames = [];
        $headerCanonData = '';
        $headers = $message->getPreparedHeaders();
        foreach ($headers->getNames() as $name) {
            foreach ($headers->all($name) as $header) {
                if (isset($headersToIgnore[strtolower($header->getName())])) {
                    continue;
                }

if ('' !== $header->getBodyAsString()) {
                    $headerCanonData .= $this->canonicalizeHeader($header->toString(), $options['header_canon']);
                    $signedHeaderNames[] = $header->getName();
                }
            }
        }

[$bodyHash, $bodyLength] = $this->hashBody($message->getBody(), $options['body_canon'], $options['body_max_length']);

$params = [
            'v' => '1',
            'q' => 'dns/txt',
            'a' => $options['algorithm'],
            'bh' => base64_encode($bodyHash),
            'd' => $this->domainName,
            'h' => implode(': ', $signedHeaderNames),
            'i' => '@'.$this->domainName,
            's' => $this->selector,
            't' => time(),
            'c' => $options['header_canon'].'/'.$options['body_canon'],
        ];

if ($options['body_show_length']) {
            $params['l'] = $bodyLength;
        }
        if ($options['signature_expiration_delay']) {
            $params['x'] = $params['t'] + $options['signature_expiration_delay'];
        }
        $value = '';
        foreach ($params as $k => $v) {
            $value .= $k.'='.$v.'; ';
        }
        $value = trim($value);
        $header = new UnstructuredHeader('DKIM-Signature', $value);
        $headerCanonData .= rtrim($this->canonicalizeHeader($header->toString()."\r\n b=", $options['header_canon']));
        if (self::ALGO_SHA256 === $options['algorithm']) {
            if (!openssl_sign($headerCanonData, $signature, $this->key, \OPENSSL_ALGO_SHA256)) {
                throw new RuntimeException('Unable to sign DKIM hash: '.openssl_error_string());
            }
        } else {
            throw new \RuntimeException(sprintf('The "%s" DKIM signing algorithm is not supported yet.', self::ALGO_ED25519));
        }
        $header->setValue($value.' b='.trim(chunk_split(base64_encode($signature), 73, ' ')));
        $headers->add($header);

return new Message($headers, $message->getBody());
    }

private function canonicalizeHeader(string $header, string $headerCanon): string
    {
        if (self::CANON_RELAXED !== $headerCanon) {
            return $header."\r\n";
        }

$exploded = explode(':', $header, 2);
        $name = strtolower(trim($exploded[0]));
        $value = str_replace("\r\n", '', $exploded[1]);
        $value = trim(preg_replace("/[ \t][ \t]+/", ' ', $value));

return $name.':'.$value."\r\n";
    }

private function hashBody(AbstractPart $body, string $bodyCanon, int $maxLength): array
    {
        $hash = hash_init('sha256');
        $relaxed = self::CANON_RELAXED === $bodyCanon;
        $currentLine = '';
        $emptyCounter = 0;
        $isSpaceSequence = false;
        $length = 0;
        foreach ($body->bodyToIterable() as $chunk) {
            $canon = '';
            for ($i = 0, $len = \strlen($chunk); $i < $len; ++$i) {
                switch ($chunk[$i]) {
                    case "\r":
                        break;
                    case "\n":
                        // previous char is always \r
                        if ($relaxed) {
                            $isSpaceSequence = false;
                        }
                        if ('' === $currentLine) {
                            ++$emptyCounter;
                        } else {
                            $currentLine = '';
                            $canon .= "\r\n";
                        }
                        break;
                    case ' ':
                    case "\t":
                        if ($relaxed) {
                            $isSpaceSequence = true;
                            break;
                        }
                        // no break
                    default:
                        if ($emptyCounter > 0) {
                            $canon .= str_repeat("\r\n", $emptyCounter);
                            $emptyCounter = 0;
                        }
                        if ($isSpaceSequence) {
                            $currentLine .= ' ';
                            $canon .= ' ';
                            $isSpaceSequence = false;
                        }
                        $currentLine .= $chunk[$i];
                        $canon .= $chunk[$i];
                }
            }

if ($length + \strlen($canon) >= $maxLength) {
                $canon = substr($canon, 0, $maxLength - $length);
                $length += \strlen($canon);
                hash_update($hash, $canon);

break;
            }

$length += \strlen($canon);
            hash_update($hash, $canon);
        }

if (0 === $length) {
            hash_update($hash, "\r\n");
            $length = 2;
        }

return [hash_final($hash, true), $length];
    }
}

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