Troubleshooting SSL Error when installing composer Asset plugin under Win7

When running composer under Win7, installing the asset plugin, SSL error occurs:

D:\data\www\mmoyu\symapp> composer global require "fxp/composer-asset-plugin:1.0.0" Loading composer repositories with package information    [Composer\Downloader\TransportException]    The  "https://packagist.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 install [--prefer- source ] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-p lugins] [--no-custom-installers] [--no-scripts] [--no-progress] [- v |vv|vvv|--ver bose] [-o|--optimize-autoloader]

No CA certificate installed caused!!!

CA Certificate: http://curl.haxx.se/docs/caextract.html

Then modify the php.ini file to add

openssl.cafile= D: /wamp/php/verify/cacert .pem

It's OK.

Troubleshooting SSL Error when installing composer Asset plugin under Win7