#33 Add custom header extractor to ASPNETCORE sample.

src/AspNetCoreWebApplication/CustomHeaderSupportingAuthenticationHeaderExtractor.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Net.Http.Headers;
+using Dalion.HttpMessageSigning.Verification.AspNetCore;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Primitives;
+
+namespace WebApplication {
+    public class CustomHeaderSupportingAuthenticationHeaderExtractor : IAuthenticationHeaderExtractor {
+        private readonly string _headerName;
+
+        public CustomHeaderSupportingAuthenticationHeaderExtractor(string headerName = "Authorization") {
+            _headerName = headerName ?? throw new ArgumentNullException(nameof(headerName));
+        }
+
+        public AuthenticationHeaderValue Extract(HttpRequest request) {
+            if (request == null) throw new ArgumentNullException(nameof(request));
+
+            var authHeader = request.Headers[_headerName];
+            if (authHeader == StringValues.Empty) {
+                return null;
+            }
+
+            var rawAuthHeader = (string) authHeader;
+            var separatorIndex = rawAuthHeader.IndexOf(' ');
+            if (separatorIndex < 0) {
+                return new AuthenticationHeaderValue(rawAuthHeader);
+            }
+
+            var authScheme = rawAuthHeader.Substring(0, separatorIndex);
+
+            if (separatorIndex >= rawAuthHeader.Length - 1) {
+                return new AuthenticationHeaderValue(authScheme);
+            }
+
+            var authParam = rawAuthHeader.Substring(separatorIndex + 1);
+
+            return new AuthenticationHeaderValue(authScheme, authParam);
+        }
+    }
+}

src/AspNetCoreWebApplication/Startup.cs

@@ -72,17 +72,20 @@ public void ConfigureServices(IServiceCollection services) {
                 })*/
 
                 /* Sample for storing Clients and Nonces on FileSystem instead of in-memory */
-                .UseFileSystemClientStore(provider => new FileSystemClientStoreSettings {
+                /*.UseFileSystemClientStore(provider => new FileSystemClientStoreSettings {
                     FilePath = Path.Combine(Path.GetTempPath(), "Clients.xml"),
                     SharedSecretEncryptionKey = "The_Big_S3cr37",
                     ClientCacheEntryExpiration = TimeSpan.FromMinutes(3)
                 })
                 .UseFileSystemNonceStore(provider => new FileSystemNonceStoreSettings {
                     FilePath = Path.Combine(Path.GetTempPath(), "Nonces.xml")
-                })
+                })*/
 
-                .UseClaimsPrincipalFactory<CustomClaimsPrincipalFactory>().Services
+                .UseClaimsPrincipalFactory<CustomClaimsPrincipalFactory>()
+                .UseAuthenticationHeaderExtractor<CustomHeaderSupportingAuthenticationHeaderExtractor>()
+                .Services
                 .AddSingleton<CustomClaimsPrincipalFactory>()
+                .AddSingleton<CustomHeaderSupportingAuthenticationHeaderExtractor>()
                 .AddHttpContextAccessor();
         }