<\/div>\n

$\"\u015eifrele\"$ <\/a>
\n\u00dcyelik sistemi olan Web projelerinde, kullan\u0131c\u0131 bilgilerinin olas\u0131 g\u00fcvenli\u011fini sa\u011flamak i\u00e7in al\u0131nan \u015fifreleri programatik olarak \u00f6nceden olu\u015fturulmu\u015f farkl\u0131 algoritmalar e\u015fli\u011finde yeniden \u015fifreleriz.Asp.NET MVC’de \u015fifreleme ve \u015fifre \u00e7\u00f6zme i\u015flemlerinde Hash metodlar\u0131 kullan\u0131lmaktad\u0131r.Hash metodlar\u0131 sayesinde verilen anahtar de\u011fer \u015fifrelendirilebilir ve \u015fifre \u00e7\u00f6z\u00fcmlemesi yap\u0131labilir.
\n
\nAsp.NET MVC’de Hash metodlar\u0131 Crypto Helper nesnesinin i\u00e7inde bulunmaktad\u0131r.<\/p>\n

Crypto Helper nesnesinin kullan\u0131labilecek metodlar\u0131 a\u015fa\u011f\u0131dad\u0131r.
\nGenerateSalt<\/strong> = Rastgele byte tipinden bir dizi olu\u015fturmak amac\u0131yla kullan\u0131l\u0131r.
\nHash(Byte(), String)<\/strong> = Verilen bir byte tipinden dizi de\u011fi\u015fkeni i\u00e7in Hash de\u011feri geriye d\u00f6nd\u00fcrecektir.
\nHash(String, String)<\/strong> = Verilen bir string tipteki de\u011fer i\u00e7in Hash de\u011feri getire d\u00f6nd\u00fcr\u00fcr.
\nHashPassword<\/strong> = Verilen bir \u015fifre de\u011feri i\u00e7in RFC 2898 Hash de\u011ferini d\u00f6nd\u00fcr\u00fcr.
\nSHA1<\/strong> = Verilen bir \u015fifre i\u00e7in SHA-1 Hash de\u011ferini d\u00f6nd\u00fcr\u00fcr.
\nSHA256<\/strong> = Verilen bir \u015fifre i\u00e7in SHA-256 Hash de\u011ferini d\u00f6nd\u00fcr\u00fcr.
\nVerifyHashedPassword<\/strong> = Verilen RFC 2898 Hash ve Password de\u011ferlerini kar\u0131\u015ft\u0131rarak ayn\u0131 olup olmad\u0131\u011f\u0131n\u0131 denetler ve geriye bool tipinde bir de\u011fer g\u00f6nderir.<\/p>\n

\u015eimdi bir TextBox nesnesine girilen de\u011feri \u015fifrelemek i\u00e7in bir \u00f6rnek yapal\u0131m.Bo\u015f bir MVC projesi olu\u015ftural\u0131m ve “Home(Controller).cs” isimli Controller s\u0131n\u0131f\u0131m\u0131zda “Sifreleme” isminde bir Action metod olu\u015ftural\u0131m.<\/p>\n

\r\n    public class HomeController : Controller\r\n    {\r\n        public ActionResult Index()\r\n        {\r\n            return View();\r\n        }\r\n\r\n        [HttpPost]\r\n        public ActionResult Sifreleme()\r\n        {\r\n            return Content("");\r\n        }\r\n    }\r\n<\/pre>\n\u015eimdi “Index” isimli Action metodumuzun View katman\u0131ndaki sayfas\u0131n\u0131 olu\u015ftural\u0131m ve kaynak kodunu a\u015fa\u011f\u0131daki gibi tasarlayal\u0131m.<\/p>\n
\r\n@{\r\n    ViewBag.Title = "Index";\r\n}\r\n@HtmlHelper.UnobtrusiveJavaScriptEnabled = true\r\n\/*Unobtrusive JavaScript \u00f6zelli\u011fini aktifle\u015ftiriyoruz.UnobtrusiveJavaScriptEnabled\r\nyap\u0131s\u0131 HTML ve JavaScript kodlar\u0131n\u0131 birbirinden ay\u0131rmak i\u00e7in kullan\u0131lmaktad\u0131r.*\/\r\n@using (Ajax.BeginForm("Sifreleme", new AjaxOptions { HttpMethod = "POST", UpdateTargetId = "gelenSonuc", InsertionMode = InsertionMode.Replace }))\r\n{\r\n    @Html.Label("\u015eifre giriniz.")\r\n    <br \/>\r\n    @Html.TextBox("txtGirilenSifre");\r\n    <br \/>\r\n    <input type="submit" value="\u015eifrele" \/>\r\n}\r\n<div id="gelenSonuc">\r\n<\/div>\r\n<\/pre>\nSizler yukar\u0131daki tasar\u0131msal kodlar\u0131 incelerken ben a\u015fa\u011f\u0131da neyi neden yapt\u0131k bahsediyorum.
\n“@using (Ajax.BeginForm(“Sifreleme”, new AjaxOptions { HttpMethod = “POST”, UpdateTargetId = “gelenSonuc”, InsertionMode = InsertionMode.Replace }))” sat\u0131r\u0131n\u0131 incelersek e\u011fer, burada bir form olu\u015fturuyoruz.Ancak bu form “HTML” nesnesinden de\u011fil, “Ajax” nesnesinden olu\u015fturulmaktad\u0131r.Yani bizim yapaca\u011f\u0131m\u0131z i\u015flemler neticesinde Ajax ile geriye sonu\u00e7 d\u00f6necek ve sayfa git gel yapmadan veriler sayfada g\u00f6z\u00fckecektir.<\/p>\n
Bu form tetiklendi\u011fi zaman, “Sifreleme” Action’\u0131 \u00e7al\u0131\u015ft\u0131racakt\u0131r ve baz\u0131 ayarlamalar yap\u0131lm\u0131\u015ft\u0131r.
\n“new AjaxOptions” nesnesi sayesinde “HttpMethod” \u00f6zelli\u011finin “Post” olaca\u011f\u0131 bildirilmi\u015ftir.”UpdateTargetId” de\u011feri sayesinde gelen sonucumuzun hangi alanda g\u00f6sterilece\u011fini yaz\u0131yoruz.Haliyle tasar\u0131m\u0131m\u0131za dikkat ederseniz id de\u011feri “gelenSonuc” isminde olan div tag\u0131m\u0131zda sonucumuzu g\u00f6sterece\u011fiz.<\/p>\n
“InsertionMode” \u00f6zelli\u011fi sayesinde ise d\u00f6nen de\u011ferin her defas\u0131nda ne \u015fekilde sayfaya getirelece\u011fini belirtiyoruz.\u00d6rnekte g\u00f6rd\u00fc\u011f\u00fcn\u00fcz gibi “Replace” belirtilirse, her g\u00f6r\u00fcnt\u00fcleme i\u015flemi \u00f6ncesinde var olan de\u011ferler silinerek, yerine yeni de\u011ferler yazd\u0131r\u0131l\u0131r.<\/p>\n
“InsertionMode” \u00f6zelli\u011finin “Replace” den farkl\u0131 iki \u00f6zelli\u011fi daha mevcuttur.Bunlardan biri, “InsertBefore” \u00f6zelli\u011fidir.Bu \u00f6zellik sayesinde yeni de\u011fer, g\u00f6r\u00fcnt\u00fclenen de\u011ferden daha \u00f6nce yaz\u0131l\u0131r.Bir di\u011fer \u00f6zellik ise, “InsertAfter” \u00f6zelli\u011fidir.Bunda ise, yeni de\u011fer, g\u00f6r\u00fcnt\u00fclenen de\u011ferden daha sonra yaz\u0131l\u0131r.<\/p>\n
Evet tasar\u0131m kodlar\u0131m\u0131zla ilgili her\u015feyi a\u00e7\u0131klam\u0131\u015f olduk.\u015eimdi programatik kodlar\u0131m\u0131z\u0131 ger\u00e7ekle\u015ftirelim.<\/p>\n
“Home(Controller).cs” isimli Controller s\u0131n\u0131f\u0131m\u0131za gelerek, “Sifreleme” ismindeki Action metodumuzu a\u015fa\u011f\u0131daki gibi g\u00fcncelleyelim.<\/p>\n
\r\n        [HttpPost]\r\n        public ActionResult Sifreleme()\r\n        {\r\n            string Sifre = Request["txtGirilenSifre"];\r\n            \/\/txtGirilenSifre ismindeki TextBox nesnemize girilen de\u011feri alm\u0131\u015f olduk.\r\n\r\n            if (Sifre.Length > 0)\r\n            {\r\n                string SaltDegeri = Crypto.GenerateSalt();\r\n                \/*\r\n                 GenerateSalt metodunu kullanarak rastgele byte de\u011ferlerinden olu\u015fan\r\n                 SaltDegeri isminde bir de\u011fi\u015fken tan\u0131mlad\u0131k.\r\n                 *\/\r\n                string HashDegeri = Crypto.HashPassword(Sifre);\r\n                \/*\r\n                 Girilecek olan \u015fifre de\u011ferini Hash i\u015flemine tabii tutarak HashDegeri\r\n                 isminde bir RFC 2898 Hash de\u011feri elde etmi\u015f olduk.\r\n                 *\/\r\n                bool EsitMi = Crypto.VerifyHashedPassword(HashDegeri, Sifre);\r\n                \/*\r\n                 Burada ise, girilen \u015fifre ile HashDegeri isimli de\u011fi\u015fkenimiz i\u00e7indeki\r\n                 de\u011feri kar\u015f\u0131la\u015ft\u0131rarak ayn\u0131 m\u0131 de\u011fil mi kontrol ettik.E\u011fer ayn\u0131 ise\r\n                 true, de\u011fil ise false de\u011ferini d\u00f6necektir.\r\n                 *\/\r\n\r\n                StringBuilder sb = new StringBuilder();\r\n                sb.Append("Yazd\u0131\u011f\u0131n\u0131z \u015fifre : ");\r\n                sb.Append(Sifre);\r\n                sb.Append("<br>");\r\n                sb.Append("Salt De\u011feri : ");\r\n                sb.Append(SaltDegeri);\r\n                sb.Append("<br>");\r\n                sb.Append("Hash De\u011feri : ");\r\n                sb.Append(HashDegeri);\r\n                sb.Append("<br>");\r\n                sb.Append("Hash de\u011feri ve yazd\u0131\u011f\u0131n\u0131z \u015fifre uygunlu\u011fu : ");\r\n                sb.Append(EsitMi);\r\n                return Content(sb.ToString());\r\n            }\r\n            return Content("L\u00fctfen \u015fifreyi bo\u015f b\u0131rakmay\u0131n\u0131z.");\r\n        }\r\n<\/pre>\nE\u011fer projeyi \u00e7al\u0131\u015ft\u0131r\u0131p denerseniz, \u015fifreleme i\u015fleminin sorunsuz ger\u00e7ekle\u015fti\u011fini g\u00f6receksiniz.
\nBir sonraki yaz\u0131mda g\u00f6r\u00fc\u015fmek \u00fczere..
\n\u0130yi \u00e7al\u0131\u015fmalar..<\/p>\n","protected":false},"excerpt":{"rendered":"
\u00dcyelik sistemi olan Web projelerinde, kullan\u0131c\u0131 bilgilerinin olas\u0131 g\u00fcvenli\u011fini sa\u011flamak i\u00e7in al\u0131nan \u015fifreleri programatik olarak \u00f6nceden olu\u015fturulmu\u015f farkl\u0131 algoritmalar e\u015fli\u011finde yeniden \u015fifreleriz.Asp.NET MVC’de \u015fifreleme ve \u015fifre \u00e7\u00f6zme i\u015flemlerinde Hash metodlar\u0131 kullan\u0131lmaktad\u0131r.Hash metodlar\u0131 sayesinde verilen...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,345],"tags":[744,746,415,414,412,411,283,413,410],"class_list":["post-1601","post","type-post","status-publish","format-standard","hentry","category-asp-net-mvc","category-mvc-4-0","tag-ajax","tag-asp-net-mvc","tag-crypto","tag-insertafter","tag-insertbefore","tag-insertionmode","tag-mvc","tag-replace","tag-updatetargetid"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts\/1601","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/comments?post=1601"}],"version-history":[{"count":0,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/posts\/1601\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/media?parent=1601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/categories?post=1601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gencayyildiz.com\/blog\/wp-json\/wp\/v2\/tags?post=1601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}