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Side by Side Diff: Src/GoogleApis.WP81/Apis/Util/Store/PasswordVaultDataStore.cs

Issue 176220043: Issue 471: Support WP8.1 (Closed) Base URL: https://google-api-dotnet-client.googlecode.com/hg/
Patch Set: AuthorizationCodeBroker main class comment Created 9 years, 4 months ago
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1 /*
2 Copyright 2014 Google Inc
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.Threading.Tasks;
19 using Windows.Security.Credentials;
20
21 using Google.Apis.Json;
22 using Google.Apis.Util.Store;
23
24 namespace Google.Apis.Util.Store
25 {
26 /// <summary>
27 /// Credentials store that implements <see cref="IDataStore"/>.
28 /// This store saves all keys encrypted in a <see cref="PasswordVault"/>
29 /// </summary>
30 public class PasswordVaultDataStore : IDataStore
31 {
32 public static PasswordVaultDataStore Default = new PasswordVaultDataStor e();
33 PasswordVault passwordVault = new PasswordVault();
34
35 /// <summary>Adds a new key to the password vault.</summary>
36 public Task StoreAsync<T>(string key, T value)
37 {
38 passwordVault.Add(new PasswordCredential(
39 typeof(T).ToString(),
40 key,
41 NewtonsoftJsonSerializer.Instance.Serialize(value)));
42 return TaskEx.Delay(0);
jmcgrew 2014/11/25 20:46:59 If available in this framework version, Task.Compl
peleyal 2014/11/26 02:54:01 Task.CompletedTask isn't exposed. It looks OK to m
43 }
44
45 /// <summary>Deletes a given key from the password vault.</summary>
46 public Task DeleteAsync<T>(string key)
47 {
48 try
49 {
50 PasswordCredential credential = passwordVault.Retrieve(typeof(T) .ToString(), key);
51 passwordVault.Remove(credential);
52 }
53 // PasswordVault.Retrieve might throw a general exception. DO NOTHIN G, there is no value for this key.
54 catch (Exception) { }
55 return TaskEx.Delay(0);
56 }
57
58 /// <summary>
59 /// Gets a specific key from the password vault. Returns <c>default(T)</ c> if there is no matching entry.
60 /// </summary>
61 public Task<T> GetAsync<T>(string key)
62 {
63 TaskCompletionSource<T> tcs = new TaskCompletionSource<T>();
64 try
65 {
66 PasswordCredential credential = passwordVault.Retrieve(typeof(T) .ToString(), key);
67 // No matching entry.
68 if (credential == null)
69 {
70 tcs.SetResult(default(T));
71 }
72 else
73 {
74 credential.RetrievePassword();
75 tcs.SetResult(NewtonsoftJsonSerializer.Instance.Deserialize< T>(credential.Password));
76 }
77 }
78 // PasswordVault.Retrieve might throw a general exception, which mea n there isn't a matching entry.
79 catch (Exception)
80 {
81 tcs.SetResult(default(T));
82 }
83 return tcs.Task;
84 }
85
86 /// <summary>Removes all values from the password vault.</summary>
87 public Task ClearAsync()
88 {
89 try
90 {
91 foreach (var credential in passwordVault.RetrieveAll())
92 {
93 passwordVault.Remove(credential);
94 }
95 }
96 // PasswordVault.RetrieveAll might throw a general exception - DO NO THING, there are no values to remove.
97 catch (Exception) { }
98 return TaskEx.Delay(0);
99 }
100 }
101 }
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