while doing composer install cmd in a proje from github throwing error

i downloaded a project from github(.zip) extracted it placed it in htdocs docs…while running the **composer install command **it’s showing “C:xampphtdocslegalcase>composer install

In Factory.php line 654:

The openssl extension is required for SSL/TLS protection but is not available. If you can not enable the openssl extension, you can disable this error, at your own risk, by setting the ‘disable-tls’ optio
n to true.

install [–prefer-source] [–prefer-dist] [–prefer-install PREFER-INSTALL] [–dry-run] [–download-only] [–dev] [–no-suggest] [–no-dev] [–no-autoloader] [–no-progress] [–no-install] [–audit] [–audit-format AUDIT-FORMAT] [-v|vv|vvv|–verbose] [-o|–optimize-autoloader] [-a|–classmap-authoritative] [–apcu-autoloader] [–apcu-autoloader-prefix APCU-AUTOLOADER-PREFIX] [–ignore-platform-req IGNORE-PLATFORM-REQ] [–ignore-platform-reqs] [–] […]”