Added DPAPI json contract resolver

ShareX.HelpersLib/Settings/DPAPIEncryptedStringPropertyResolver.cs

@@ -0,0 +1,54 @@
+#region License Information (GPL v3)
+
+/*
+    ShareX - A program that allows you to take screenshots and share any file type
+    Copyright (c) 2007-2020 ShareX Team
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+    Optionally you can also view the license at <http://www.gnu.org/licenses/>.
+*/
+
+#endregion License Information (GPL v3)
+
+using Newtonsoft.Json;
+using Newtonsoft.Json.Serialization;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+
+namespace ShareX.HelpersLib
+{
+    public class DPAPIEncryptedStringPropertyResolver : WritablePropertiesOnlyResolver
+    {
+        protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
+        {
+            IList<JsonProperty> props = base.CreateProperties(type, memberSerialization);
+
+            foreach (JsonProperty prop in props.Where(p => p.PropertyType == typeof(string)))
+            {
+                PropertyInfo pi = type.GetProperty(prop.UnderlyingName);
+
+                if (pi != null && pi.GetCustomAttribute(typeof(JsonEncryptAttribute), true) != null)
+                {
+                    prop.ValueProvider = new DPAPIEncryptedStringValueProvider(pi);
+                }
+            }
+
+            return props;
+        }
+    }
+}

ShareX.HelpersLib/Settings/DPAPIEncryptedStringValueProvider.cs

@@ -0,0 +1,75 @@
+#region License Information (GPL v3)
+
+/*
+    ShareX - A program that allows you to take screenshots and share any file type
+    Copyright (c) 2007-2020 ShareX Team
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+    Optionally you can also view the license at <http://www.gnu.org/licenses/>.
+*/
+
+#endregion License Information (GPL v3)
+
+using Newtonsoft.Json.Serialization;
+using System.Reflection;
+
+namespace ShareX.HelpersLib
+{
+    public class DPAPIEncryptedStringValueProvider : IValueProvider
+    {
+        private PropertyInfo targetProperty;
+
+        public DPAPIEncryptedStringValueProvider(PropertyInfo targetProperty)
+        {
+            this.targetProperty = targetProperty;
+        }
+
+        public object GetValue(object target)
+        {
+            string value = (string)targetProperty.GetValue(target);
+            string encryptedValue = null;
+
+            if (!string.IsNullOrEmpty(value))
+            {
+                try
+                {
+                    encryptedValue = DPAPI.Encrypt(value);
+                }
+                catch
+                {
+                }
+
+            }
+
+            return encryptedValue;
+        }
+
+        public void SetValue(object target, object value)
+        {
+            string decryptedValue = null;
+
+            try
+            {
+                decryptedValue = DPAPI.Decrypt((string)value);
+            }
+            catch
+            {
+            }
+
+            targetProperty.SetValue(target, decryptedValue);
+        }
+    }
+}

ShareX.HelpersLib/Settings/JsonEncryptAttribute.cs

@@ -0,0 +1,34 @@
+#region License Information (GPL v3)
+
+/*
+    ShareX - A program that allows you to take screenshots and share any file type
+    Copyright (c) 2007-2020 ShareX Team
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License
+    as published by the Free Software Foundation; either version 2
+    of the License, or (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+    Optionally you can also view the license at <http://www.gnu.org/licenses/>.
+*/
+
+#endregion License Information (GPL v3)
+
+using System;
+
+namespace ShareX.HelpersLib
+{
+    [AttributeUsage(AttributeTargets.Property)]
+    public class JsonEncryptAttribute : Attribute
+    {
+    }
+}

ShareX.HelpersLib/Settings/WritablePropertiesOnlyResolver.cs

@@ -31,7 +31,7 @@
 
 namespace ShareX.HelpersLib
 {
-    internal class WritablePropertiesOnlyResolver : DefaultContractResolver
+    public class WritablePropertiesOnlyResolver : DefaultContractResolver
     {
         protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
         {

ShareX.HelpersLib/ShareX.HelpersLib.csproj

@@ -91,6 +91,7 @@
     <Reference Include="System.IO.Compression.FileSystem" />
     <Reference Include="System.Management" />
     <Reference Include="System.Runtime.Remoting" />
+    <Reference Include="System.Security" />
     <Reference Include="System.Web" />
     <Reference Include="System.Xml.Linq">
       <RequiredTargetFramework>3.5</RequiredTargetFramework>
@@ -139,6 +140,7 @@
     <Compile Include="Controls\ToolStripNumericUpDown.cs">
       <SubType>Component</SubType>
     </Compile>
+    <Compile Include="Cryptographic\DPAPI.cs" />
     <Compile Include="Emoji.cs" />
     <Compile Include="Forms\DebugForm.cs">
       <SubType>Form</SubType>
@@ -151,6 +153,9 @@
     <Compile Include="PointInfo.cs" />
     <Compile Include="Random\RandomCrypto.cs" />
     <Compile Include="Random\RandomFast.cs" />
+    <Compile Include="Settings\DPAPIEncryptedStringPropertyResolver.cs" />
+    <Compile Include="Settings\DPAPIEncryptedStringValueProvider.cs" />
+    <Compile Include="Settings\JsonEncryptAttribute.cs" />
     <Compile Include="SevenZipManager.cs" />
     <Compile Include="Input\HotkeyForm.cs">
       <SubType>Form</SubType>