fix incorrect padding with multi-byte strings
fix incorrect padding with multi-byte strings

As far as encrypting and paddings are concerned, we are talking about **bytes** and not **characters**. So basic strlen/substr functions must be used instead of their mbstring version.
chipotle/quill,lxyz/laraveldemo,kerick-jeff/istore,sergi10/rfuerzo,zeropingheroes/lanyard,renemeza/college-web-control,coolguy1990/madrambles,thosakwe/rGuard,renemeza/college-web-control,natetheaverage/Bosspos-dev,xezw211/wx,thosakwe/rGuard,thosakwe/rGuard,ucla/shib-oauth2-bridge,escanton/invoices-providers,farwish/laravel-pro,thosakwe/rGuard,kjvenky/laravel,renemeza/college-web-control,lcp0578/Wiki,slawisha/RestaurantManager,abbasadel/TheGlobalMeter,xezw211/wx,flysap/skeleton,hackel/laravel,chipotle/quill,renemeza/college-web-control,tkc/laravel-unit-test-sample,lxerxa/actionview,sergi10/rfuerzo,orckid-lab/dashboard,Stolz/Wiki,beautifultable/phpwind,coolguy1990/madrambles,lxerxa/actionview,slimkit/thinksns-plus,remxcode/laravel-base,kerick-jeff/iPub,lxerxa/actionview,udayrockstar/RestaurantManager,udayrockstar/RestaurantManager,RowlandOti/SlimeApi,superdol/Wiki,coolguy1990/madrambles,natetheaverage/Bosspos-dev,superdol/Wiki,zeropingheroes/lanyard,boomcms/boomcms,kerick-jeff/iPub,superdol/Wiki,sergi10/rfuerzo,GoogleCloudPlatform/laravel,remxcode/laravel-base,lxerxa/actionview,xezw211/wx,thosakwe/rGuard,escanton/invoices-providers,GoogleCloudPlatform/laravel,abbasadel/TheGlobalMeter,orckid-lab/dashboard,pdoren/laravel4,SIJOT/SIJOT-2.x,abbasadel/TheGlobalMeter,kjvenky/laravel,pdoren/laravel4,pdoren/laravel4,beautifultable/phpwind,zhiyicx/thinksns-plus,natetheaverage/Bosspos-dev,Stolz/Wiki,flysap/skeleton,slawisha/RestaurantManager,coolguy1990/madrambles,tinywitch/laravel,abbasadel/TheGlobalMeter,zhiyicx/thinksns-plus,RowlandOti-Student/SlimeApi,tkc/laravel-unit-test-sample,hackel/laravel,cbnuke/FilesCollection,tkc/laravel-unit-test-sample,slawisha/RestaurantManager,slimkit/thinksns-plus,chipotle/quill,SIJOT/SIJOT-2.x,Stichoza/laravel-boilerplate,GoogleCloudPlatform/laravel,zeropingheroes/lanyard,ebollens/shib-oauth2-bridge,farwish/laravel-pro,martindilling/martindilling,abbasadel/TheGlobalMeter,martindilling/martindilling,kerick-jeff/iPub,hackel/laravel,escanton/invoices-providers,tkc/laravel-unit-test-sample,lcp0578/Wiki,chipotle/quill,udayrockstar/RestaurantManager,kerick-jeff/istore,lcp0578/Wiki,Stolz/Wiki,martindilling/martindilling,cbnuke/FilesCollection,natetheaverage/Bosspos-dev