Implement client_secret hashing/key derivation

samples/Mvc.Server/Startup.cs

@@ -1,4 +1,5 @@
 using System.Linq;
+using CryptoHelper;
 using Microsoft.AspNet.Builder;
 using Microsoft.AspNet.Identity.EntityFramework;
 using Microsoft.Data.Entity;
@@ -7,6 +8,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using Mvc.Server.Models;
 using Mvc.Server.Services;
+using OpenIddict;
 using OpenIddict.Models;
 
 namespace Mvc.Server {
@@ -75,8 +77,8 @@ namespace Mvc.Server {
                         DisplayName = "My client application",
                         RedirectUri = "http://localhost:53507/signin-oidc",
                         LogoutRedirectUri = "http://localhost:53507/",
-                        Secret = "secret_secret_secret",
-                        Type = ApplicationType.Confidential
+                        Secret = Crypto.HashPassword("secret_secret_secret"),
+                        Type = OpenIddictConstants.ApplicationTypes.Confidential
                     });
 
                     context.SaveChanges();

src/OpenIddict.Core/IOpenIddictStore.cs

@@ -9,6 +9,6 @@ namespace OpenIddict {
         Task<string> GetApplicationTypeAsync(TApplication application, CancellationToken cancellationToken);
         Task<string> GetDisplayNameAsync(TApplication application, CancellationToken cancellationToken);
         Task<string> GetRedirectUriAsync(TApplication application, CancellationToken cancellationToken);
-        Task<bool> ValidateSecretAsync(TApplication application, string secret, CancellationToken cancellationToken);
+        Task<string> GetHashedSecretAsync(TApplication application, CancellationToken cancellationToken);
     }
 }

src/OpenIddict.Core/OpenIddictHelpers.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Threading.Tasks;
+
+namespace OpenIddict {
+    public static class OpenIddictHelpers {
+        public static async Task<bool> IsConfidentialApplicationAsync<TUser, TApplication>(
+            this OpenIddictManager<TUser, TApplication> manager, TApplication application)
+            where TUser : class
+            where TApplication : class {
+            if (manager == null) {
+                throw new ArgumentNullException(nameof(manager));
+            }
+
+            if (application == null) {
+                throw new ArgumentNullException(nameof(application));
+            }
+
+            var type = await manager.GetApplicationTypeAsync(application);
+
+            return string.Equals(type, OpenIddictConstants.ApplicationTypes.Confidential, StringComparison.OrdinalIgnoreCase);
+        }
+
+        public static async Task<bool> IsPublicApplicationAsync<TUser, TApplication>(
+            this OpenIddictManager<TUser, TApplication> manager, TApplication application)
+            where TUser : class
+            where TApplication : class {
+            if (manager == null) {
+                throw new ArgumentNullException(nameof(manager));
+            }
+
+            if (application == null) {
+                throw new ArgumentNullException(nameof(application));
+            }
+
+            var type = await manager.GetApplicationTypeAsync(application);
+
+            return string.Equals(type, OpenIddictConstants.ApplicationTypes.Public, StringComparison.OrdinalIgnoreCase);
+        }
+    }
+}

src/OpenIddict.Core/OpenIddictManager.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Linq;
 using System.Threading.Tasks;
+using CryptoHelper;
 using Microsoft.AspNet.Http;
 using Microsoft.AspNet.Identity;
 using Microsoft.Extensions.DependencyInjection;
@@ -50,12 +51,21 @@ namespace OpenIddict {
                     select claim.Value).FirstOrDefault();
         }
 
-        public virtual Task<string> GetApplicationTypeAsync(TApplication application) {
+        public virtual async Task<string> GetApplicationTypeAsync(TApplication application) {
             if (application == null) {
                 throw new ArgumentNullException(nameof(application));
             }
 
-            return Store.GetApplicationTypeAsync(application, Context.RequestAborted);
+            var type = await Store.GetApplicationTypeAsync(application, Context.RequestAborted);
+
+            // Ensure the application type returned by the store is supported by the manager.
+            if (!string.Equals(type, OpenIddictConstants.ApplicationTypes.Confidential, StringComparison.OrdinalIgnoreCase) &&
+                !string.Equals(type, OpenIddictConstants.ApplicationTypes.Public, StringComparison.OrdinalIgnoreCase)) {
+                throw new InvalidOperationException("Only 'confidential' or 'public' applications are " +
+                                                    "supported by the default OpenIddict manager.");
+            }
+
+            return type;
         }
 
         public virtual Task<string> GetDisplayNameAsync(TApplication application) {
@@ -66,20 +76,41 @@ namespace OpenIddict {
             return Store.GetDisplayNameAsync(application, Context.RequestAborted);
         }
 
-        public virtual Task<string> GetRedirectUriAsync(TApplication application) {
+        public virtual async Task<bool> ValidateRedirectUriAsync(TApplication application, string address) {
             if (application == null) {
                 throw new ArgumentNullException(nameof(application));
             }
 
-            return Store.GetRedirectUriAsync(application, Context.RequestAborted);
+            if (!string.Equals(address, await Store.GetRedirectUriAsync(application, Context.RequestAborted), StringComparison.Ordinal)) {
+                Logger.LogWarning("Client validation failed because {RedirectUri} was not a valid redirect_uri " +
+                                  "for {Client}", address, await GetDisplayNameAsync(application));
+
+                return false;
+            }
+
+            return true;
         }
 
-        public virtual Task<bool> ValidateSecretAsync(TApplication application, string secret) {
+        public virtual async Task<bool> ValidateSecretAsync(TApplication application, string secret) {
             if (application == null) {
                 throw new ArgumentNullException(nameof(application));
             }
 
-            return Store.ValidateSecretAsync(application, secret, Context.RequestAborted);
+            var type = await GetApplicationTypeAsync(application);
+            if (!string.Equals(type, OpenIddictConstants.ApplicationTypes.Confidential, StringComparison.OrdinalIgnoreCase)) {
+                Logger.LogWarning("Client authentication cannot be enforced for non-confidential applications.");
+
+                return false;
+            }
+
+            var hash = await Store.GetHashedSecretAsync(application, Context.RequestAborted);
+            if (!Crypto.VerifyHashedPassword(hash, secret)) {
+                Logger.LogWarning("Client authentication failed for {Client}.", await GetDisplayNameAsync(application));
+
+                return false;
+            }
+
+            return true;
         }
     }
 }

src/OpenIddict.Core/OpenIddictProvider.cs

@@ -51,7 +51,7 @@ namespace OpenIddict {
                 return;
             }
 
-            if (!string.Equals(context.RedirectUri, await manager.GetRedirectUriAsync(application), StringComparison.Ordinal)) {
+            if (!await manager.ValidateRedirectUriAsync(application, context.RedirectUri)) {
                 context.Rejected(
                     error: OpenIdConnectConstants.Errors.InvalidClient,
                     description: "Invalid redirect_uri");
@@ -114,8 +114,7 @@ namespace OpenIddict {
 
             // Reject tokens requests containing a client_secret
             // if the client application is not confidential.
-            var type = await manager.GetApplicationTypeAsync(application);
-            if (type == OpenIddictConstants.ApplicationTypes.Public && !string.IsNullOrEmpty(context.ClientSecret)) {
+            if (await manager.IsPublicApplicationAsync(application) && !string.IsNullOrEmpty(context.ClientSecret)) {
                 context.Rejected(
                     error: OpenIdConnectConstants.Errors.InvalidRequest,
                     description: "Public clients are not allowed to send a client_secret");
@@ -124,7 +123,7 @@ namespace OpenIddict {
             }
 
             // Confidential applications MUST authenticate.
-            else if (type == OpenIddictConstants.ApplicationTypes.Confidential && 
+            else if (await manager.IsConfidentialApplicationAsync(application) && 
                     !await manager.ValidateSecretAsync(application, context.ClientSecret)) {
                 context.Rejected(
                     error: OpenIdConnectConstants.Errors.InvalidClient,
@@ -145,8 +144,7 @@ namespace OpenIddict {
 
             // To prevent downgrade attacks, ensure that authorization requests using the hybrid/implicit
             // flow are rejected if the client identifier corresponds to a confidential application.
-            var type = await manager.GetApplicationTypeAsync(application);
-            if (type == OpenIddictConstants.ApplicationTypes.Confidential && !context.Request.IsAuthorizationCodeFlow()) {
+            if (await manager.IsConfidentialApplicationAsync(application) && !context.Request.IsAuthorizationCodeFlow()) {
                 context.Rejected(
                     error: OpenIdConnectConstants.Errors.InvalidRequest,
                     description: "Confidential clients can only use response_type=code.");

src/OpenIddict.Core/project.json

@@ -16,7 +16,9 @@
             "version": "1.0.0-*"
         },
 
-        "AspNet.Security.OpenIdConnect.Server": "1.0.0-*"
+        "AspNet.Security.OpenIdConnect.Server": "1.0.0-*",
+
+        "CryptoHelper": "1.0.0-rc1-build03"
     },
 
     "frameworks": {

src/OpenIddict.EF/OpenIddictStore.cs

@@ -33,16 +33,7 @@ namespace OpenIddict {
                 throw new ArgumentNullException(nameof(application));
             }
 
-            switch (application.Type) {
-            case ApplicationType.Confidential:
-                return Task.FromResult(OpenIddictConstants.ApplicationTypes.Confidential);
-
-            case ApplicationType.Public:
-                return Task.FromResult(OpenIddictConstants.ApplicationTypes.Public);
-
-            default:
-                throw new InvalidOperationException($"Unsupported application type ('{application.Type.ToString()}').");
-            }
+            return Task.FromResult(application.Type);
         }
 
         public virtual Task<string> GetDisplayNameAsync(TApplication application, CancellationToken cancellationToken) {
@@ -61,12 +52,12 @@ namespace OpenIddict {
             return Task.FromResult(application.RedirectUri);
         }
 
-        public virtual Task<bool> ValidateSecretAsync(TApplication application, string secret, CancellationToken cancellationToken) {
+        public virtual Task<string> GetHashedSecretAsync(TApplication application, CancellationToken cancellationToken) {
             if (application == null) {
                 throw new ArgumentNullException(nameof(application));
             }
 
-            return Task.FromResult(string.Equals(application.Secret, secret, StringComparison.Ordinal));
+            return Task.FromResult(application.Secret);
         }
     }
 }

src/OpenIddict.Models/Application.cs

@@ -11,6 +11,6 @@ namespace OpenIddict.Models {
         public string RedirectUri { get; set; }
         public string LogoutRedirectUri { get; set; }
         public string Secret { get; set; }
-        public ApplicationType Type { get; set; }
+        public string Type { get; set; }
     }
 }

src/OpenIddict.Models/ApplicationType.cs

@@ -1,12 +0,0 @@
-/*
- * Licensed under the Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
- * See https://github.com/openiddict/core for more information concerning
- * the license and the contributors participating to this project.
- */
-
-namespace OpenIddict.Models {
-    public enum ApplicationType {
-        Public = 0,
-        Confidential = 1
-    }
-}