Искал ответы в гите композера и в stackoverflow, пробовал делать примерно так, как там, но не помогло. Там было написано примерно так: нужно скачать сертификат cacert.pem и прописать в конфигах пхп путь до него. Я это сделал, скачав его с https://github.com/composer/ca-bundle/blob/master/res/cacert.pem и указав в php.ini путь до него c:/usr/local/ssl/cacert.pem, но это положительного эффекта не дало. По-прежнему bad signature. Win10 x64 Open Server 5.2.2, PHP 7.1 config PHP: [openssl] openssl.cafile=C:/usr/local/ssl/cacert.pem openssl.capath=C:/usr/local/ssl/ Сам сертификат первые строки: $ cat "C:/usr/local/ssl/cacert.pem" ## ## Bundle of CA Root Certificates ## ## Certificate data from Mozilla as of: Wed Jan 1 04:12:10 2020 GMT Выполнял команду $ composer config --global cafile "c:/usr/local/ssl/cacert.pem", не помогло. Ниже текст ошибки: --- $ composer global require laravel/installer Changed current directory to C:/Users/User1/AppData/Roaming/Composer The "https://repo.packagist.org/packages.json" file could not be downloaded: SSL operation failed with code 1. OpenSSL Error messages: error:04091068:rsa routines:INT_RSA_VERIFY:bad signature error:0D0C5006:asn1 encoding routines:ASN1_item_verify:EVP lib error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed Failed to enable crypto failed to open stream: operation failed https://repo.packagist.org could not be fully loaded, package information was loaded from the local cache and may be out of date [Composer\Downloader\TransportException] The "https://packagist.org/p/laravel/ins...6b8f4561fbc20e646aeb4bbf15f4727eafaab1ba962.j son" file could not be downloaded: SSL operation failed with code 1. OpenSSL Error messages: error:04091068:rsa routines:INT_RSA_VERIFY:bad signature error:0D0C5006:asn1 encoding routines:ASN1_item_verify:EVP lib error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed Failed to enable crypto failed to open stream: operation failed ---