How to get the User roles in SP2013?

I am able to get the users roles (User AD groups) in SP 2010 (NTLM/Classic sites) using Roles.GetRolesForUser(); method. But the same method gives encrypted roles in SP2013 as like this,

"0).w|s-1-5-21-3781269710-2253848316-4214219372-5434"
"0*.w|s-1-5-21-3781269710-2253848316-4214219372-513"
"0!.s|windows"
"0(.s|true"

I need a user groups as like this,

DOMAIN\Administrator

DOMAIN\WSS_WPG

DOMAIN\WSS_WPG_ADMIN

Following activities I did to get the decrypted roles. But I am not able to get the decrypted roles.

1. Broke the claims and try to get the roles from the  SPClaims object.

IClaimsIdentity claimsIdentity;

          ClaimCollection userClaims;

           claimsIdentity = ((IClaimsPrincipal)(Thread.CurrentPrincipal)).Identities[0];

           userClaims = claimsIdentity.Claims;

       allRoles = userClaims.Where(r => r.ClaimType ==ClaimTypes.Role).Select(r => r.Value).ToArray();

  2. Convert SAML 2.0 to Windows NT token and get the roles from NT token

               SPSecurity.RunWithElevatedPrivileges(delegate()

                {

                   WindowsIdentity windowsIdentity = S4UClient.UpnLogon(upn);

                    using (WindowsImpersonationContext ctxt = windowsIdentity.Impersonate())

                    {

                       IdentityReferenceCollection objWinRoleCollection = windowsIdentity.Groups;

                    }

                   IdentityReferenceCollection objWinRoleCollectionw = windowsIdentity.Groups;

                    allRoles =Roles.GetRolesForUser();

                });

    3. Set the SALM claims requirement as role in web.config file to return roles

<microsoft.identityModel>

    <servicesaveBootstrapTokens="true">

      <audienceUris />

      <issuerNameRegistrytype="Microsoft.SharePoint.IdentityModel.SPPassiveIssuerNameRegistry, Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" />

      <issuerTokenResolvertype="Microsoft.SharePoint.IdentityModel.SPIssuerTokenResolver, Microsoft.SharePoint.IdentityModel, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" />

      <securityTokenHandlers>

        <clear />

        <addtype="Microsoft.IdentityModel.Tokens.X509SecurityTokenHandler, Microsoft.IdentityModel, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />

        <addtype="Microsoft.SharePoint.IdentityModel.SPSaml11SecurityTokenHandler, Microsoft.SharePoint.IdentityModel, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c">

          <samlSecurityTokenRequirement>

            <nameClaimTypevalue="http://schemas.microsoft.com/sharepoint/2009/08/claims/userid" />

           <roleClaimTypevalue="http://schemas.microsoft.com/ws/2008/06/identity/claims/role"/>

          </samlSecurityTokenRequirement>

        </add>

        <addtype="Microsoft.SharePoint.IdentityModel.SPTokenCache, Microsoft.SharePoint.IdentityModel, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" />

      </securityTokenHandlers>

      <federatedAuthentication>

        <wsFederationpassiveRedirectEnabled="false"issuer="https://none"realm="https://none" />

        <cookieHandlermode="Custom"path="/">

          <customCookieHandlertype="Microsoft.SharePoint.IdentityModel.SPChunkedCookieHandler, Microsoft.SharePoint.IdentityModel, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" />

        </cookieHandler>

      </federatedAuthentication>

    </service>

  </microsoft.identityModel>

4. Get the roles from SPClaimsAuthRoleProvider class

allRoles = newSPClaimsAuthRoleProvider().GetRolesForUser(SPContext.Current.Web.CurrentUser.LoginName);

   5. Decrypt the Claims token

foreach (string roleinRoles.GetRolesForUser(name.Value))

            {

               SPClaim spcrole = SPClaimProviderManager.Local.DecodeClaimFromFormsSuffix(role); // This is the method you are looking for

               if (spcrole.ClaimType == ClaimTypes.Role)

                {

                    rolesList.Add(spcrole.Value);

                }

            }

  6. Get the role from the Default role provide

  allRoles = Roles.Providers["c"].GetAllRoles();

All above methods return only the encrypted role. I searched over the internet but I am not able to get the much help for the SP2013.

Any help is greatly appreciated.

Thanks and Regards, BalaMurugan J