Moved StringHelper and Byte extensions to Utility project.

Teknik.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 14
-VisualStudioVersion = 14.0.25123.0
+VisualStudioVersion = 14.0.25420.1
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Teknik", "Teknik\Teknik.csproj", "{B20317CD-76C6-4A7B-BCE1-E4BEF8E4F964}"
 EndProject
@@ -13,6 +13,12 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ServerMaint", "ServerMaint\ServerMaint.csproj", "{E08975F9-1B84-41B0-875A-CEC9778C4F9E}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Utilities", "Utilities", "{9408DBDE-D7DF-45EE-AAEB-821BABAA6152}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Tools", "Tools", "{783361EC-DCD6-4A34-8479-5476DF752C34}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Utilities", "Utilities\Utilities\Utilities.csproj", "{F45DE6FC-3754-4954-A20A-4277362CC6C1}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -38,8 +44,20 @@ Global
 		{E08975F9-1B84-41B0-875A-CEC9778C4F9E}.Release|Any CPU.Build.0 = Release|Any CPU
 		{E08975F9-1B84-41B0-875A-CEC9778C4F9E}.Release|x64.ActiveCfg = Release|Any CPU
 		{E08975F9-1B84-41B0-875A-CEC9778C4F9E}.Release|x64.Build.0 = Release|Any CPU
+		{F45DE6FC-3754-4954-A20A-4277362CC6C1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F45DE6FC-3754-4954-A20A-4277362CC6C1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F45DE6FC-3754-4954-A20A-4277362CC6C1}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{F45DE6FC-3754-4954-A20A-4277362CC6C1}.Debug|x64.Build.0 = Debug|Any CPU
+		{F45DE6FC-3754-4954-A20A-4277362CC6C1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F45DE6FC-3754-4954-A20A-4277362CC6C1}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F45DE6FC-3754-4954-A20A-4277362CC6C1}.Release|x64.ActiveCfg = Release|Any CPU
+		{F45DE6FC-3754-4954-A20A-4277362CC6C1}.Release|x64.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{E08975F9-1B84-41B0-875A-CEC9778C4F9E} = {783361EC-DCD6-4A34-8479-5476DF752C34}
+		{F45DE6FC-3754-4954-A20A-4277362CC6C1} = {9408DBDE-D7DF-45EE-AAEB-821BABAA6152}
+	EndGlobalSection
 EndGlobal

Teknik/Areas/API/Controllers/APIv1Controller.cs

@@ -14,6 +14,7 @@ using System.Text;
 using Teknik.Areas.Shortener.Models;
 using nClam;
 using Teknik.Filters;
+using Teknik.Utilities;
 
 namespace Teknik.Areas.API.Controllers
 {
@@ -98,11 +99,11 @@ namespace Teknik.Areas.API.Controllers
                             // Generate key and iv if empty
                             if (string.IsNullOrEmpty(key))
                             {
-                                key = Utility.RandomString(keySize / 8);
+                                key = StringHelper.RandomString(keySize / 8);
                             }
                             if (string.IsNullOrEmpty(iv))
                             {
-                                iv = Utility.RandomString(blockSize / 8);
+                                iv = StringHelper.RandomString(blockSize / 8);
                             }
 
                             data = AES.Encrypt(fileData, key, iv);
@@ -120,7 +121,7 @@ namespace Teknik.Areas.API.Controllers
                             // Generate delete key if asked to
                             if (genDeletionKey)
                             {
-                                string delKey = Utility.RandomString(Config.UploadConfig.DeleteKeyLength);
+                                string delKey = StringHelper.RandomString(Config.UploadConfig.DeleteKeyLength);
                                 upload.DeleteKey = delKey;
                                 db.Entry(upload).State = EntityState.Modified;
                                 db.SaveChanges();

Teknik/Areas/Paste/Controllers/PasteController.cs

@@ -14,7 +14,7 @@ using Teknik.Controllers;
 using Teknik.Filters;
 using Teknik.Helpers;
 using Teknik.Models;
-
+using Teknik.Utilities;
 
 namespace Teknik.Areas.Paste.Controllers
 {

Teknik/Areas/Paste/PasteHelper.cs

@@ -6,6 +6,7 @@ using System.Web;
 using Teknik.Configuration;
 using Teknik.Helpers;
 using Teknik.Models;
+using Teknik.Utilities;
 
 namespace Teknik.Areas.Paste
 {
@@ -21,10 +22,10 @@ namespace Teknik.Areas.Paste
             paste.Views = 0;
 
             // Generate random url
-            string url = Utility.RandomString(config.PasteConfig.UrlLength);
+            string url = StringHelper.RandomString(config.PasteConfig.UrlLength);
             while (db.Pastes.Where(p => p.Url == url).FirstOrDefault() != null)
             {
-                url = Utility.RandomString(config.PasteConfig.UrlLength);
+                url = StringHelper.RandomString(config.PasteConfig.UrlLength);
             }
             paste.Url = url;
 
@@ -58,8 +59,8 @@ namespace Teknik.Areas.Paste
             // Set the hashed password if one is provided and encrypt stuff
             if (!string.IsNullOrEmpty(password))
             {
-                string key = Utility.RandomString(config.PasteConfig.KeySize / 8);
-                string iv = Utility.RandomString(config.PasteConfig.BlockSize / 16);
+                string key = StringHelper.RandomString(config.PasteConfig.KeySize / 8);
+                string iv = StringHelper.RandomString(config.PasteConfig.BlockSize / 16);
                 paste.HashedPassword = SHA384.Hash(key, password).ToHex();
 
                 // Encrypt Content

Teknik/Areas/Shortener/Shortener.cs

@@ -6,6 +6,7 @@ using System.Threading.Tasks;
 using Teknik.Areas.Shortener.Models;
 using Teknik.Helpers;
 using Teknik.Models;
+using Teknik.Utilities;
 
 namespace Teknik.Areas.Shortener
 {
@@ -16,10 +17,10 @@ namespace Teknik.Areas.Shortener
             TeknikEntities db = new TeknikEntities();
             
             // Generate the shortened url
-            string shortUrl = Utility.RandomString(length);
+            string shortUrl = StringHelper.RandomString(length);
             while (db.ShortenedUrls.Where(s => s.ShortUrl == shortUrl).FirstOrDefault() != null)
             {
-                shortUrl = Utility.RandomString(length);
+                shortUrl = StringHelper.RandomString(length);
             }
 
             ShortenedUrl newUrl = new ShortenedUrl();

Teknik/Areas/Upload/Controllers/UploadController.cs

@@ -17,6 +17,7 @@ using Teknik.Controllers;
 using Teknik.Filters;
 using Teknik.Helpers;
 using Teknik.Models;
+using Teknik.Utilities;
 
 namespace Teknik.Areas.Upload.Controllers
 {
@@ -102,7 +103,7 @@ namespace Teknik.Areas.Upload.Controllers
                             // Generate key and iv if empty
                             if (string.IsNullOrEmpty(key))
                             {
-                                key = Utility.RandomString(keySize / 8);
+                                key = StringHelper.RandomString(keySize / 8);
                             }
 
                             fileData = AES.Encrypt(fileData, key, iv);
@@ -380,7 +381,7 @@ namespace Teknik.Areas.Upload.Controllers
             Models.Upload upload = db.Uploads.Where(up => up.Url == file).FirstOrDefault();
             if (upload != null)
             {
-                string delKey = Utility.RandomString(Config.UploadConfig.DeleteKeyLength);
+                string delKey = StringHelper.RandomString(Config.UploadConfig.DeleteKeyLength);
                 upload.DeleteKey = delKey;
                 db.Entry(upload).State = EntityState.Modified;
                 db.SaveChanges();

Teknik/Areas/Upload/Uploader.cs

@@ -6,6 +6,7 @@ using System.IO;
 using Teknik.Configuration;
 using Teknik.Models;
 using Teknik.Helpers;
+using Teknik.Utilities;
 
 namespace Teknik.Areas.Upload
 {
@@ -46,10 +47,10 @@ namespace Teknik.Areas.Upload
 
             // Generate a unique url
             string extension = (config.UploadConfig.IncludeExtension) ? Utility.GetDefaultExtension(contentType, defaultExtension) : string.Empty;
-            string url = Utility.RandomString(config.UploadConfig.UrlLength) + extension;
+            string url = StringHelper.RandomString(config.UploadConfig.UrlLength) + extension;
             while (db.Uploads.Where(u => u.Url == url).FirstOrDefault() != null)
             {
-                url = Utility.RandomString(config.UploadConfig.UrlLength) + extension;
+                url = StringHelper.RandomString(config.UploadConfig.UrlLength) + extension;
             }
 
             // Now we need to update the database with the new upload information

Teknik/Areas/User/Utility/UserHelper.cs

@@ -17,6 +17,7 @@ using Teknik.Areas.Users.Models;
 using Teknik.Configuration;
 using Teknik.Helpers;
 using Teknik.Models;
+using Teknik.Utilities;
 
 namespace Teknik.Areas.Users.Utility
 {
@@ -437,7 +438,7 @@ namespace Teknik.Areas.Users.Utility
             }
 
             // Create a new verification code and add it
-            string verifyCode = Helpers.Utility.RandomString(24);
+            string verifyCode = StringHelper.RandomString(24);
             RecoveryEmailVerification ver = new RecoveryEmailVerification();
             ver.UserId = user.UserId;
             ver.Code = verifyCode;
@@ -518,7 +519,7 @@ Thank you and enjoy!
             }
 
             // Create a new verification code and add it
-            string verifyCode = Helpers.Utility.RandomString(24);
+            string verifyCode = StringHelper.RandomString(24);
             ResetPasswordVerification ver = new ResetPasswordVerification();
             ver.UserId = user.UserId;
             ver.Code = verifyCode;

Teknik/Helpers/Utility.cs

@@ -7,6 +7,7 @@ using System.IO;
 using System.Linq;
 using System.Text;
 using System.Web;
+using Teknik.Utilities;
 
 namespace Teknik.Helpers
 {
@@ -30,42 +31,11 @@ namespace Teknik.Helpers
             return result;
         }
 
-        public static string RandomString(int length, string allowedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
-        {
-            const int byteSize = 0x100;
-            var allowedCharSet = new HashSet<char>(allowedChars).ToArray();
-            if (byteSize < allowedCharSet.Length) throw new ArgumentException(String.Format("allowedChars may contain no more than {0} characters.", byteSize));
-
-            // Guid.NewGuid and System.Random are not particularly random. By using a
-            // cryptographically-secure random number generator, the caller is always
-            // protected, regardless of use.
-            using (var rng = new System.Security.Cryptography.RNGCryptoServiceProvider())
-            {
-                var result = new StringBuilder();
-                var buf = new byte[128];
-                while (result.Length < length)
-                {
-                    rng.GetBytes(buf);
-                    for (var i = 0; i < buf.Length && result.Length < length; ++i)
-                    {
-                        // Divide the byte into allowedCharSet-sized groups. If the
-                        // random value falls into the last group and the last group is
-                        // too small to choose from the entire allowedCharSet, ignore
-                        // the value in order to avoid biasing the result.
-                        var outOfRangeStart = byteSize - (byteSize % allowedCharSet.Length);
-                        if (outOfRangeStart <= buf[i]) continue;
-                        result.Append(allowedCharSet[buf[i] % allowedCharSet.Length]);
-                    }
-                }
-                return result.ToString();
-            }
-        }
-
         public static string GenerateUniqueFileName(string path, string extension, int length)
         {
             if (Directory.Exists(path))
             {
-                string filename = RandomString(length);
+                string filename = StringHelper.RandomString(length);
                 string subDir = filename[0].ToString();
                 path = Path.Combine(path, subDir);
                 if (!Directory.Exists(path))
@@ -74,7 +44,7 @@ namespace Teknik.Helpers
                 }
                 while (File.Exists(Path.Combine(path, string.Format("{0}.{1}", filename, extension))))
                 {
-                    filename = RandomString(length);
+                    filename = StringHelper.RandomString(length);
                     subDir = filename[0].ToString();
                     path = Path.Combine(path, subDir);
                     if (!Directory.Exists(path))
@@ -102,63 +72,6 @@ namespace Teknik.Helpers
             return result;
         }
 
-        public static string GetBytesReadable(long i)
-        {
-            // Get absolute value
-            long absolute_i = (i < 0 ? -i : i);
-            // Determine the suffix and readable value
-            string suffix;
-            double readable;
-            if (absolute_i >= 0x1000000000000000) // Exabyte
-            {
-                suffix = "EB";
-                readable = (i >> 50);
-            }
-            else if (absolute_i >= 0x4000000000000) // Petabyte
-            {
-                suffix = "PB";
-                readable = (i >> 40);
-            }
-            else if (absolute_i >= 0x10000000000) // Terabyte
-            {
-                suffix = "TB";
-                readable = (i >> 30);
-            }
-            else if (absolute_i >= 0x40000000) // Gigabyte
-            {
-                suffix = "GB";
-                readable = (i >> 20);
-            }
-            else if (absolute_i >= 0x100000) // Megabyte
-            {
-                suffix = "MB";
-                readable = (i >> 10);
-            }
-            else if (absolute_i >= 0x400) // Kilobyte
-            {
-                suffix = "KB";
-                readable = i;
-            }
-            else
-            {
-                return i.ToString("0 B"); // Byte
-            }
-            // Divide by 1024 to get fractional value
-            readable = (readable / 1024);
-            // Return formatted number with suffix
-            return readable.ToString("0.### ") + suffix;
-        }
-
-        public static string ToHex(this byte[] bytes)
-        {
-            string hashString = string.Empty;
-            foreach (byte x in bytes)
-            {
-                hashString += String.Format("{0:x2}", x);
-            }
-            return hashString;
-        }
-
         public static byte[] ImageToByte(Image img)
         {
             byte[] byteArray = new byte[0];

Teknik/Teknik.csproj

@@ -713,6 +713,12 @@
   <ItemGroup>
     <WCFMetadata Include="Service References\" />
   </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Utilities\Utilities\Utilities.csproj">
+      <Project>{f45de6fc-3754-4954-a20a-4277362cc6c1}</Project>
+      <Name>Utilities</Name>
+    </ProjectReference>
+  </ItemGroup>
   <PropertyGroup>
     <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">10.0</VisualStudioVersion>
     <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>

Utilities/Uploader/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("Uploader")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Uploader")]
+[assembly: AssemblyCopyright("Copyright ©  2017")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("f9db28e9-efa1-4d0f-a7b3-c8f491306ce3")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

Utilities/Uploader/Uploader.cs

@@ -0,0 +1,71 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Teknik.Utilities
+{
+    public class Uploader
+    {
+        public static Models.Upload SaveFile(TeknikEntities db, Config config, byte[] file, string contentType, int contentLength)
+        {
+            return SaveFile(db, config, file, contentType, contentLength, string.Empty, null, null, 256, 128);
+        }
+        public static Models.Upload SaveFile(TeknikEntities db, Config config, byte[] file, string contentType, int contentLength, string defaultExtension)
+        {
+            return SaveFile(db, config, file, contentType, contentLength, defaultExtension, null, null, 256, 128);
+        }
+
+        public static Models.Upload SaveFile(TeknikEntities db, Config config, byte[] file, string contentType, int contentLength, string defaultExtension, string iv)
+        {
+            return SaveFile(db, config, file, contentType, contentLength, defaultExtension, iv, null, 256, 128);
+        }
+
+        public static Models.Upload SaveFile(TeknikEntities db, Config config, byte[] file, string contentType, int contentLength, string defaultExtension, string iv, string key)
+        {
+            return SaveFile(db, config, file, contentType, contentLength, defaultExtension, iv, key, 256, 128);
+        }
+
+        public static Models.Upload SaveFile(TeknikEntities db, Config config, byte[] file, string contentType, int contentLength, string defaultExtension, string iv, string key, int keySize, int blockSize)
+        {
+            if (!Directory.Exists(config.UploadConfig.UploadDirectory))
+            {
+                Directory.CreateDirectory(config.UploadConfig.UploadDirectory);
+            }
+
+            // Generate a unique file name that does not currently exist
+            string filePath = Utility.GenerateUniqueFileName(config.UploadConfig.UploadDirectory, config.UploadConfig.FileExtension, 10);
+            string fileName = Path.GetFileName(filePath);
+
+            // once we have the filename, lets save the file
+            File.WriteAllBytes(filePath, file);
+
+            // Generate a unique url
+            string extension = (config.UploadConfig.IncludeExtension) ? Utility.GetDefaultExtension(contentType, defaultExtension) : string.Empty;
+            string url = Utility.RandomString(config.UploadConfig.UrlLength) + extension;
+            while (db.Uploads.Where(u => u.Url == url).FirstOrDefault() != null)
+            {
+                url = Utility.RandomString(config.UploadConfig.UrlLength) + extension;
+            }
+
+            // Now we need to update the database with the new upload information
+            Models.Upload upload = db.Uploads.Create();
+            upload.DateUploaded = DateTime.Now;
+            upload.Url = url;
+            upload.FileName = fileName;
+            upload.ContentType = (!string.IsNullOrEmpty(contentType)) ? contentType : "application/octet-stream";
+            upload.ContentLength = contentLength;
+            upload.Key = key;
+            upload.IV = iv;
+            upload.KeySize = keySize;
+            upload.BlockSize = blockSize;
+
+            db.Uploads.Add(upload);
+            db.SaveChanges();
+
+            return upload;
+        }
+    }
+}

Utilities/Uploader/Uploader.csproj

@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{F9DB28E9-EFA1-4D0F-A7B3-C8F491306CE3}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Uploader</RootNamespace>
+    <AssemblyName>Uploader</AssemblyName>
+    <TargetFrameworkVersion>v4.6.2</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Uploader.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>

Utilities/Utilities/ByteExtensions.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Teknik.Utilities
+{
+    public static class ByteExtensions
+    {
+        public static string ToHex(this byte[] bytes)
+        {
+            string hashString = string.Empty;
+            foreach (byte x in bytes)
+            {
+                hashString += String.Format("{0:x2}", x);
+            }
+            return hashString;
+        }
+    }
+}

Utilities/Utilities/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("Teknik Utilities")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Teknik Utilities")]
+[assembly: AssemblyCopyright("Copyright ©  2017")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("f45de6fc-3754-4954-a20a-4277362cc6c1")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

Utilities/Utilities/StringHelper.cs

@@ -0,0 +1,89 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Web;
+
+namespace Teknik.Utilities
+{
+    public static class StringHelper
+    {
+        public static string RandomString(int length, string allowedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
+        {
+            const int byteSize = 0x100;
+            var allowedCharSet = new HashSet<char>(allowedChars).ToArray();
+            if (byteSize < allowedCharSet.Length) throw new ArgumentException(String.Format("allowedChars may contain no more than {0} characters.", byteSize));
+
+            // Guid.NewGuid and System.Random are not particularly random. By using a
+            // cryptographically-secure random number generator, the caller is always
+            // protected, regardless of use.
+            using (var rng = new System.Security.Cryptography.RNGCryptoServiceProvider())
+            {
+                var result = new StringBuilder();
+                var buf = new byte[128];
+                while (result.Length < length)
+                {
+                    rng.GetBytes(buf);
+                    for (var i = 0; i < buf.Length && result.Length < length; ++i)
+                    {
+                        // Divide the byte into allowedCharSet-sized groups. If the
+                        // random value falls into the last group and the last group is
+                        // too small to choose from the entire allowedCharSet, ignore
+                        // the value in order to avoid biasing the result.
+                        var outOfRangeStart = byteSize - (byteSize % allowedCharSet.Length);
+                        if (outOfRangeStart <= buf[i]) continue;
+                        result.Append(allowedCharSet[buf[i] % allowedCharSet.Length]);
+                    }
+                }
+                return result.ToString();
+            }
+        }
+
+        public static string GetBytesReadable(long i)
+        {
+            // Get absolute value
+            long absolute_i = (i < 0 ? -i : i);
+            // Determine the suffix and readable value
+            string suffix;
+            double readable;
+            if (absolute_i >= 0x1000000000000000) // Exabyte
+            {
+                suffix = "EB";
+                readable = (i >> 50);
+            }
+            else if (absolute_i >= 0x4000000000000) // Petabyte
+            {
+                suffix = "PB";
+                readable = (i >> 40);
+            }
+            else if (absolute_i >= 0x10000000000) // Terabyte
+            {
+                suffix = "TB";
+                readable = (i >> 30);
+            }
+            else if (absolute_i >= 0x40000000) // Gigabyte
+            {
+                suffix = "GB";
+                readable = (i >> 20);
+            }
+            else if (absolute_i >= 0x100000) // Megabyte
+            {
+                suffix = "MB";
+                readable = (i >> 10);
+            }
+            else if (absolute_i >= 0x400) // Kilobyte
+            {
+                suffix = "KB";
+                readable = i;
+            }
+            else
+            {
+                return i.ToString("0 B"); // Byte
+            }
+            // Divide by 1024 to get fractional value
+            readable = (readable / 1024);
+            // Return formatted number with suffix
+            return readable.ToString("0.### ") + suffix;
+        }
+    }
+}

Utilities/Utilities/Utilities.csproj

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{F45DE6FC-3754-4954-A20A-4277362CC6C1}</ProjectGuid>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Teknik.Utilities</RootNamespace>
+    <AssemblyName>Teknik.Utilities</AssemblyName>
+    <TargetFrameworkVersion>v4.6.2</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="ByteExtensions.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="StringHelper.cs" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+       Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+</Project>