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<?php |
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|
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defined('ABSPATH') or die('Jog on!'); |
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|
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/** |
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* Premium license? |
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* |
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* @return bool |
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*/ |
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function sh_cd_license_is_premium() { |
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return (bool) get_option( 'sh-cd-license-valid', false ); |
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} |
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|
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/** |
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* Return a link to the upgrade page |
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* |
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* @return string |
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*/ |
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function sh_cd_license_upgrade_link() { |
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|
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$link = admin_url('admin.php?page=sh-cd-shortcode-variables-license'); |
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|
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return esc_url( $link ); |
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} |
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|
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/** |
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* Check an existing license's hash is still valid |
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**/ |
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function sh_cd_license_validate( $license ) { |
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|
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if ( true === empty( $license ) ) { |
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return __( 'License missing', SH_CD_SLUG ); |
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} |
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|
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// Decode license |
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$license = sh_cd_license_decode( $license ); |
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|
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if ( true === empty( $license ) ) { |
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return 'Could not decode / verify license'; |
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} |
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|
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// Does site hash in license meet this site's actual hash? |
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if ( true === empty( $license['site-hash'] ) ) { |
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return 'Invalid license hash'; |
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} |
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|
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// Match this site hash? |
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if ( sh_cd_generate_site_hash() !== $license['site-hash']) { |
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return 'This license doesn\'t appear to be for this site (no match on site hash).'; |
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} |
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|
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// Valid date? |
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$today_time = strtotime( date( 'Y-m-d' ) ); |
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$expire_time = strtotime( $license['expiry-date'] ); |
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|
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if ( $expire_time < $today_time ) { |
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return 'This license has expired.'; |
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} |
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|
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return true; |
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} |
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|
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/** |
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* Validate and decode a license |
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**/ |
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function sh_cd_license_decode( $license ) { |
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|
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if( true === empty( $license ) ) { |
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return NULL; |
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} |
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|
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// Base64 and JSON decode |
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$license = base64_decode( $license ); |
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|
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if( false === $license ) { |
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return NULL; |
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} |
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|
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$license = json_decode( $license, true ); |
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|
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if( true === empty( $license ) ) { |
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return NULL; |
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} |
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|
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// Validate hash! |
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$verify_hash = md5( 'yeken.uk' . $license['type'] . $license['expiry-days'] . $license['site-hash'] . $license['expiry-date'] ); |
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|
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return ( $license['hash'] == $verify_hash && false === empty( $license ) ) ? $license : NULL; |
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} |
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|
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|
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/** |
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* Validate and apply a license |
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**/ |
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function sh_cd_license_apply( $license ) { |
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|
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// Validate license |
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$license_result = sh_cd_license_validate($license); |
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|
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if( true === $license_result ) { |
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|
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update_option( 'sh-cd-license', $license ); |
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update_option( 'sh-cd-license-valid', true ); |
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|
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return true; |
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} |
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|
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return false; |
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} |
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|
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/** |
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* Remove a license |
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**/ |
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function sh_cd_license_remove() { |
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|
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delete_option( 'sh-cd-license' ); |
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delete_option( 'sh-cd-license-valid' ); |
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} |
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|
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/** |
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* Generate a site hash to identify this site. |
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**/ |
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function sh_cd_generate_site_hash() { |
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|
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$site_hash = get_option( 'sh-cd-hash' ); |
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|
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// Generate a basic site key from URL and plugin slug |
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if( false == $site_hash ) { |
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|
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$site_hash = md5( 'yeken-sh-cd-' . site_url() ); |
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$site_hash = substr( $site_hash, 0, 6 ); |
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|
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update_option( 'sh-cd-hash', $site_hash ); |
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|
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} |
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return $site_hash; |
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} |
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|
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/** |
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* Fetch license |
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* |
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* @return mixed |
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*/ |
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function sh_cd_license() { |
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return get_option( 'sh-cd-license', '' ); |
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} |
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|
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|
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// function t() { |
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// |
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// if ( true === is_admin() ) { |
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// return; |
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// } |
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// |
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// |
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// $t = sh_cd_generate_site_hash(); |
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// |
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// var_dump( $t ); |
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// |
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// $t = sh_cd_license_apply('eyJ0eXBlIjoicHJvIiwiZXhwaXJ5LWRheXMiOjM2Niwic2l0ZS1oYXNoIjoiNjhiYjJiIiwiZXhwaXJ5LWRhdGUiOiIyMDIwLTAyLTE5IiwiaGFzaCI6Ijc0NTdhNjg3NjZlYzI3NjZjMmRmOWVjZTk4YjlkNTA5In0'); |
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// |
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// $t = sh_cd_license_is_premium(); |
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// |
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// var_dump( $t ); |
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// |
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// die; |
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// |
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// } |
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// add_action('init', 't'); |
