Composer 错误：14090086：SSL 例程：SSL3_GET_SERVER_CERTIFICATE：证书验证失败答案

【问题标题】：Composer error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failedComposer 错误：14090086：SSL 例程：SSL3_GET_SERVER_CERTIFICATE：证书验证失败
【发布时间】：2016-04-26 19:58:14
【问题描述】：

在尝试清理我们的项目依赖项时，composer 失败并出现以下错误：

The "https://packagist.drupal-composer.org/packages.json" file could not be downloaded: SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
Failed to enable crypto
failed to open stream: operation failed
https://packagist.drupal-composer.org could not be fully loaded, package information was loaded from the local cache and may be out of date

这发生在一个流浪的 CentOS 7 机器上。

【问题讨论】：

标签： php drupal openssl composer-php

【解决方案1】：

我发现一个answer 建议下载Mozilla CA certificate store 并确保在php.ini 中设置了openssl.cafile，但这对我不起作用。

我运行wget -v https://packagist.drupal-composer.org/packages.json 来查看它从我的本地机器（它工作正常）和流浪盒子返回的内容。 vagrant box 上的输出是：

--2016-04-24 09:08:30--  https://packagist.drupal-composer.org/packages.json
Resolving packagist.drupal-composer.org... 147.75.205.69
Connecting to packagist.drupal-composer.org|147.75.205.69|:443... connected.
ERROR: cannot verify packagist.drupal-composer.org's certificate, issued by "/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3":
  Issued certificate not yet valid.
To connect to packagist.drupal-composer.org insecurely, use '--no-check-certificate'.

对我来说，证书返回时还没有生效，这让我感到很奇怪，直到我意识到输出中的日期差了 2 天（今天是 04-26，而不是 04-24）。修复系统时钟后，我重试并能够下载所有依赖项。

【讨论】：