Accept all available encryption protocols available to the .NET 4.0 F…

…ramework (TLS 1.0, 1.1, 1.2; SSL 3)

git-svn-id: https://svn.openstreetmap.org/applications/utils/Srtm2Osm/trunk@33758 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4

OsmUtils.Framework/OsmUtils.Framework.csproj

@@ -65,7 +65,6 @@
       <Link>CommonAssemblyInfo.cs</Link>
     </Compile>
     <Compile Include="ExpressionFunctions.cs" />
-    <Compile Include="ExpressionSelector.cs" />
     <Compile Include="IOsmElementSelector.cs" />
     <Compile Include="KeyValueSelector.cs" />
     <Compile Include="MultipleKeyValueSelector.cs" />

Srtm2Osm/Srtm2OsmCommand.cs

@@ -14,6 +14,7 @@
 using Brejc.Geometry;
 using System.Text.RegularExpressions;
 using System.Globalization;
+using System.Net;
 
 namespace Srtm2Osm
 {
@@ -49,8 +50,14 @@ public void Execute ()
             ConsoleActivityLogger activityLogger = new ConsoleActivityLogger();
             activityLogger.LogLevel = ActivityLogLevel.Verbose;
 
+            // Use all available encryption protocols supported in the .NET Framework 4.0.
+            // TLS versions > 1.0 are supported and available via the extensions.
+            // see https://blogs.perficient.com/microsoft/2016/04/tsl-1-2-and-net-support/
+            // This is a global setting for all HTTP requests.
+            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolTypeExtensions.Tls11 | SecurityProtocolTypeExtensions.Tls12 | SecurityProtocolType.Ssl3;
+
             // first make sure that the SRTM directory exists
-            if (false == Directory.Exists (srtmDir))
+            if (!Directory.Exists (srtmDir))
                 Directory.CreateDirectory (srtmDir);
 
             string srtmIndexFilename = Path.Combine (srtmDir, "SrtmIndex.dat");