Swift_Signers_SMimeSigner::messageStreamToEncryptedByteStream PHP Method

    protected function messageStreamToEncryptedByteStream(Swift_FileStream $outputStream, Swift_InputByteStream $is)
    {
        $encryptedMessageStream = new Swift_ByteStream_TemporaryFileByteStream();
        if (!openssl_pkcs7_encrypt($outputStream->getPath(), $encryptedMessageStream->getPath(), $this->encryptCert, array(), 0, $this->encryptCipher)) {
            throw new Swift_IoException(sprintf('Failed to encrypt S/Mime message. Error: "%s".', openssl_error_string()));
        }
        $this->copyFromOpenSSLOutput($encryptedMessageStream, $is);
    }