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<?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\RuntimeException;
use Symfony\Component\Mime\Message;
/**
* @author Sebastiaan Stok <s.stok@rollerscapes.net>
*/
final class SMimeSigner extends SMime
{
private string $signCertificate;
private string|array $signPrivateKey;
private int $signOptions;
private ?string $extraCerts;
/**
* @param string $certificate The path of the file containing the signing certificate (in PEM format)
* @param string $privateKey The path of the file containing the private key (in PEM format)
* @param string|null $privateKeyPassphrase A passphrase of the private key (if any)
* @param string|null $extraCerts The path of the file containing intermediate certificates (in PEM format) needed by the signing certificate
* @param int|null $signOptions Bitwise operator options for openssl_pkcs7_sign() (@see https://secure.php.net/manual/en/openssl.pkcs7.flags.php)
*/
public function __construct(string $certificate, string $privateKey, string $privateKeyPassphrase = null, string $extraCerts = null, int $signOptions = null)
{
if (!\extension_loaded('openssl')) {
throw new \LogicException('PHP extension "openssl" is required to use SMime.');
}
$this->signCertificate = $this->normalizeFilePath($certificate);
if (null !== $privateKeyPassphrase) {
$this->signPrivateKey = [$this->normalizeFilePath($privateKey), $privateKeyPassphrase];
} else {
$this->signPrivateKey = $this->normalizeFilePath($privateKey);
}
$this->signOptions = $signOptions ?? \PKCS7_DETACHED;
$this->extraCerts = $extraCerts ? realpath($extraCerts) : null;
}
public function sign(Message $message): Message
{
$bufferFile = tmpfile();
$outputFile = tmpfile();
$this->iteratorToFile($message->getBody()->toIterable(), $bufferFile);
if (!@openssl_pkcs7_sign(stream_get_meta_data($bufferFile)['uri'], stream_get_meta_data($outputFile)['uri'], $this->signCertificate, $this->signPrivateKey, [], $this->signOptions, $this->extraCerts)) {
throw new RuntimeException(sprintf('Failed to sign S/Mime message. Error: "%s".', openssl_error_string()));
}
return new Message($message->getHeaders(), $this->convertMessageToSMimePart($outputFile, 'multipart', 'signed'));
}
}