secure storage service

src/Core/Services/SecureStorageService.cs

@@ -0,0 +1,53 @@
+using Bit.Core.Abstractions;
+using System;
+using System.Threading.Tasks;
+
+namespace Bit.Core.Services
+{
+    public class SecureStorageService : IStorageService
+    {
+        private string _keyFormat = "bwSecureStorage:{0}";
+
+        public async Task<T> GetAsync<T>(string key)
+        {
+            var objType = typeof(T);
+            if(objType == typeof(string))
+            {
+                var formattedKey = string.Format(_keyFormat, key);
+                var val = await Xamarin.Essentials.SecureStorage.GetAsync(formattedKey);
+                return (T)(object)val;
+            }
+            else
+            {
+                throw new Exception("Unsupported object type for secure storage.");
+            }
+        }
+
+        public async Task SaveAsync<T>(string key, T obj)
+        {
+            if(obj == null)
+            {
+                await RemoveAsync(key);
+                return;
+            }
+
+            var objType = typeof(T);
+            if(objType == typeof(string))
+            {
+                var formattedKey = string.Format(_keyFormat, key);
+                await Xamarin.Essentials.SecureStorage.SetAsync(formattedKey, obj as string);
+            }
+            else
+            {
+                throw new Exception("Unsupported object type for secure storage.");
+            }
+        }
+
+        public Task RemoveAsync(string key)
+        {
+            var formattedKey = string.Format(_keyFormat, key);
+            Xamarin.Essentials.SecureStorage.Remove(formattedKey);
+            return Task.FromResult(0);
+        }
+    }
+}