src/Tizen.Account.OAuth2/Tizen.Account.OAuth2/ImplicitGrantAuthorizer.cs

   1 /*
   2  * Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the License);
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an AS IS BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 using System;
  18 using System.Collections.Generic;
  19 using System.Runtime.InteropServices;
  20 using System.Threading.Tasks;
  21
  22 namespace Tizen.Account.OAuth2
  23 {
  24     /// <summary>
  25     /// The ImplicitGrantAuthorizer is used to obtain access tokens using Implicit Grant flow as described at https://tools.ietf.org/html/rfc6749#section-4.2
  26     /// </summary>
  27     /// <since_tizen> 3 </since_tizen>
  28     public class ImplicitGrantAuthorizer : Authorizer
  29     {
  30         /// <summary>
  31         /// The constructor
  32         /// </summary>
  33         /// <since_tizen> 3 </since_tizen>
  34         public ImplicitGrantAuthorizer()
  35         {
  36
  37         }
  38
  39         /// <summary>
  40         /// Retrieves access token asynchronously. The authroization request parameters should be as defined in https://tools.ietf.org/html/rfc6749#section-4.2.1
  41         /// </summary>
  42         /// <since_tizen> 3 </since_tizen>
  43         /// <param name="request">The authorization request <see cref="ImplicitGrantAuthorizationRequest"/></param>
  44         /// <returns>The response containing access token.</returns>
  45         /// <privilege>http://tizen.org/privilege/internet</privilege>
  46         /// <exception cref="ArgumentException">Thrown when method failed due to invalid argumets</exception>
  47         /// <exception cref="OAuth2Exception">Thrown when method fails due to server error</exception>
  48         public new virtual async Task<TokenResponse> AuthorizeAsync(AuthorizationRequest request)
  49         {
  50             IntPtr requestHandle = GetRequestHandle(request as ImplicitGrantAuthorizationRequest);
  51             return await Task.Run(() => GetAuthorizationResponse(requestHandle));
  52         }
  53
  54         /// <summary>
  55         /// Access token can be retreived implicitly using <see cref="AuthorizeAsync"/> in this flow.
  56         /// </summary>
  57         /// <since_tizen> 3 </since_tizen>
  58         /// <exception cref="InvalidOperationException">Thrown when the operation is not supported</exception>
  59         public override Task<TokenResponse> GetAccessTokenAsync(TokenRequest request)
  60         {
  61             Log.Error(ErrorFactory.LogTag, "Obtain token directly from authorization grant ");
  62             throw new InvalidOperationException();
  63         }
  64
  65         /// <summary>
  66         /// Refreshing access token is not supported in this flow.
  67         /// </summary>
  68         /// <since_tizen> 3 </since_tizen>
  69         /// <exception cref="InvalidOperationException">Thrown when the operation is not supported</exception>
  70         public override Task<TokenResponse> RefreshAccessTokenAsync(RefreshTokenRequest request)
  71         {
  72             Log.Error(ErrorFactory.LogTag, "Refesh token is not supported in Implicit Grant flow");
  73             throw new InvalidOperationException();
  74         }
  75
  76         private TokenResponse GetAuthorizationResponse(IntPtr requestHandle)
  77         {
  78             IntPtr error = IntPtr.Zero;
  79             TokenResponse response = null;
  80             int ret = (int)OAuth2Error.None;
  81             Interop.Manager.Oauth2AuthGrantCallback authGrantCb = (IntPtr responseHandle, IntPtr usrData) =>
  82             {
  83                 if (responseHandle == IntPtr.Zero)
  84                 {
  85                     Log.Error(ErrorFactory.LogTag, "Error occured");
  86                     throw (new ArgumentNullException());
  87                 }
  88
  89                 Interop.Response.GetError(responseHandle, out error);
  90                 if (error != IntPtr.Zero)
  91                 {
  92                     Log.Error(ErrorFactory.LogTag, "Server Error occured");
  93                 }
  94                 else
  95                 {
  96                     IntPtr accessToken;
  97                     ret = Interop.Response.GetAccessToken(responseHandle, out accessToken);
  98                     if (ret != (int)OAuth2Error.None)
  99                     {
 100                         Log.Error(ErrorFactory.LogTag, "Interop failed");
 101                         throw ErrorFactory.GetException(ret);
 102                     }
 103
 104                     IntPtr tokenType;
 105                     ret = Interop.Response.GetTokenType(responseHandle, out tokenType);
 106                     if (ret != (int)OAuth2Error.None)
 107                     {
 108                         Log.Error(ErrorFactory.LogTag, "Interop failed");
 109                         throw ErrorFactory.GetException(ret);
 110                     }
 111
 112                     long expiresIn;
 113                     ret = Interop.Response.GetExpiresIn(responseHandle, out expiresIn);
 114                     if (ret != (int)OAuth2Error.None)
 115                     {
 116                         Log.Error(ErrorFactory.LogTag, "Interop failed");
 117                         throw ErrorFactory.GetException(ret);
 118                     }
 119
 120                     IntPtr scope;
 121                     ret = Interop.Response.GetScope(responseHandle, out scope);
 122                     if (ret != (int)OAuth2Error.None)
 123                     {
 124                         Log.Error(ErrorFactory.LogTag, "Interop failed");
 125                         throw ErrorFactory.GetException(ret);
 126                     }
 127
 128                     IntPtr state;
 129                     ret = Interop.Response.GetState(responseHandle, out state);
 130                     if (ret != (int)OAuth2Error.None)
 131                     {
 132                         Log.Error(ErrorFactory.LogTag, "Interop failed");
 133                         throw ErrorFactory.GetException(ret);
 134                     }
 135
 136                     IEnumerable<string> scopes = (scope == IntPtr.Zero) ? null : Marshal.PtrToStringAnsi(scope)?.Split(' ');
 137
 138                     var token = new AccessToken() { Token = Marshal.PtrToStringAnsi(accessToken), ExpiresIn = expiresIn, Scope = scopes, TokenType = Marshal.PtrToStringAnsi(tokenType) };
 139                     response = new TokenResponse(responseHandle) { AccessToken = token, State = Marshal.PtrToStringAnsi(state), RefreshToken = null };
 140                 }
 141             };
 142
 143             ret = Interop.Manager.RequestAuthorizationGrant(_managerHandle, requestHandle, authGrantCb, IntPtr.Zero);
 144             Interop.Request.Destroy(requestHandle);
 145             if (ret != (int)OAuth2Error.None || error != IntPtr.Zero)
 146             {
 147                 if (error != IntPtr.Zero)
 148                 {
 149                     throw ErrorFactory.GetException(error);
 150                 }
 151                 else
 152                 {
 153                     Log.Error(ErrorFactory.LogTag, "Interop failed");
 154                     throw ErrorFactory.GetException(ret);
 155                 }
 156             }
 157
 158             return response;
 159         }
 160
 161         // Fill device request handle for Authorization code grant
 162         private IntPtr GetRequestHandle(ImplicitGrantAuthorizationRequest request)
 163         {
 164             if (request == null)
 165             {
 166                 Log.Error(ErrorFactory.LogTag, "Invalid request or request is null");
 167                 throw ErrorFactory.GetException((int)OAuth2Error.InvalidParameter);
 168             }
 169
 170             IntPtr requestHandle;
 171             int ret = Interop.Request.Create(out requestHandle);
 172             if (ret != (int)OAuth2Error.None)
 173             {
 174                 Log.Error(ErrorFactory.LogTag, "Interop failed");
 175                 throw ErrorFactory.GetException(ret);
 176             }
 177
 178             ret = Interop.Request.SetAuthEndPointUrl(requestHandle, request.AuthorizationEndpoint.ToString());
 179             if (ret != (int)OAuth2Error.None)
 180             {
 181                 Log.Error(ErrorFactory.LogTag, "Interop failed");
 182                 throw ErrorFactory.GetException(ret);
 183             }
 184
 185             ret = Interop.Request.SetResponseType(requestHandle, Interop.ResponseType.Token);
 186             if (ret != (int)OAuth2Error.None)
 187             {
 188                 Log.Error(ErrorFactory.LogTag, "Interop failed");
 189                 throw ErrorFactory.GetException(ret);
 190             }
 191
 192             ret = Interop.Request.SetClientId(requestHandle, request.ClientSecrets.Id);
 193             if (ret != (int)OAuth2Error.None)
 194             {
 195                 Log.Error(ErrorFactory.LogTag, "Interop failed");
 196                 throw ErrorFactory.GetException(ret);
 197             }
 198
 199             if (request.RedirectionEndPoint != null)
 200             {
 201                 ret = Interop.Request.SetRedirectionUrl(requestHandle, request.RedirectionEndPoint.ToString());
 202                 if (ret != (int)OAuth2Error.None)
 203                 {
 204                     Log.Error(ErrorFactory.LogTag, "Interop failed");
 205                     throw ErrorFactory.GetException(ret);
 206                 }
 207             }
 208
 209             if (request.Scopes != null)
 210             {
 211                 string scope = string.Join(" ", request.Scopes);
 212                 ret = Interop.Request.SetScope(requestHandle, scope);
 213                 if (ret != (int)OAuth2Error.None)
 214                 {
 215                     Log.Error(ErrorFactory.LogTag, "Interop failed");
 216                     throw ErrorFactory.GetException(ret);
 217                 }
 218             }
 219
 220             if (request.State != null)
 221             {
 222                 ret = Interop.Request.SetState(requestHandle, request.State);
 223                 if (ret != (int)OAuth2Error.None)
 224                 {
 225                     Log.Error(ErrorFactory.LogTag, "Interop failed");
 226                     throw ErrorFactory.GetException(ret);
 227                 }
 228             }
 229
 230             if (request.CustomData != null)
 231             {
 232                 foreach (var item in request.CustomData)
 233                 {
 234                     ret = Interop.Request.AddCustomData(requestHandle, item.Key, item.Value);
 235                     if (ret != (int)OAuth2Error.None)
 236                     {
 237                         Log.Error(ErrorFactory.LogTag, "Interop failed");
 238                         throw ErrorFactory.GetException(ret);
 239                     }
 240                 }
 241             }
 242
 243             return requestHandle;
 244         }
 245     }
 246 }