Fix compatibility problems (coscine/issues#1335)

src/LegacySTS/Controllers/STSController.cs

@@ -5,6 +5,7 @@ using System;
 using System.IdentityModel.Configuration;
 using System.IdentityModel.Services;
 using System.IdentityModel.Tokens;
+using System.Web;
 
 namespace Coscine.Api.LegacySTS.Controllers
 {
@@ -16,12 +17,12 @@ namespace Coscine.Api.LegacySTS.Controllers
         }
 
         [HttpPost("[controller]/processSignIn/{url}/{hostValue}")]
-        public IActionResult ProcessSignIn(Uri url, string hostValue, [FromBody] SignInInstance signInInstance)
+        public IActionResult ProcessSignIn(string url, string hostValue, [FromBody] SignInInstance signInInstance)
         {
             var user = signInInstance.User;
             var userObject = signInInstance.UserObject;
 
-            var requestMessage = (SignInRequestMessage)WSFederationMessage.CreateFromUri(url);
+            var requestMessage = (SignInRequestMessage)WSFederationMessage.CreateFromUri(new Uri(HttpUtility.UrlDecode(url)));
             var signingCredentials = new X509SigningCredentials(CustomSecurityTokenService.GetCertificate());
 
             var config = new SecurityTokenServiceConfiguration(hostValue, signingCredentials);

src/LegacySTS/LegacySTS.csproj

@@ -37,6 +37,7 @@
     <Reference Include="System.Core" />
     <Reference Include="System.IdentityModel" />
     <Reference Include="System.IdentityModel.Services" />
+    <Reference Include="System.Web" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />