refactor: RSA-Kryptografie-Klassen für bessere Flexibilität und Effizienz überarbeitet

- Konstruktoren zu `RSACryptographer`, `RSADecryptor` und `RSAEncryptor` hinzugefügt, um die Initialisierung zu verbessern.
- `PublicKeyPem` in `RSADecryptor` optimiert, um unnötige Objekterstellungen zu vermeiden.
- `Verify`-Methode in `RSAEncryptor` korrigiert, um eine korrekte Signaturprüfung zu gewährleisten.
- Code-Wiederverwendbarkeit verbessert, indem Base64-Konvertierungslogik zentralisiert wurde.

.gitignore

@@ -408,3 +408,4 @@ FodyWeavers.xsd
 /DigitalData.Core.ConsoleApp/DigitalData.Core.ConsoleApp.csproj
 /DigitalData.Core.ConsoleApp/Program.cs
 /DigitalData.Core.ConsoleApp/FooHttpOptions.cs
+/DigitalData.Core.Tests/obj/

DigitalData.Core.Security/DigitalData.Core.Security.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFrameworks>net7.0;net8.0</TargetFrameworks>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

DigitalData.Core.Security/Extensions.cs

@@ -0,0 +1,13 @@
+namespace DigitalData.Core.Security
+{
+    public static class Extensions
+    {
+        public static string ToBase64String(this byte[] bytes) => Convert.ToBase64String(bytes);
+
+        public static byte[] Base64ToByte(this string base64String) => Convert.FromBase64String(base64String);
+
+        public static byte[] ToBytes(this string str) => System.Text.Encoding.UTF8.GetBytes(str);
+
+        public static string BytesToString(this byte[] bytes) => System.Text.Encoding.UTF8.GetString(bytes);
+    }
+}

DigitalData.Core.Security/RSACryptographer.cs

@@ -0,0 +1,21 @@
+using System.Security.Cryptography;
+
+namespace DigitalData.Core.Security
+{
+    public class RSACryptographer
+    {
+        internal RSACryptographer() { }
+
+        public required string Pem
+        {
+            init
+            {
+                _rsa.ImportFromPem(value);
+            }
+        }
+
+        public required RSAEncryptionPadding Padding { get; init; }
+
+        protected readonly RSA _rsa = RSA.Create();
+    }
+}

DigitalData.Core.Security/RSADecryptor.cs

@@ -0,0 +1,25 @@
+using System.Security.Cryptography;
+
+namespace DigitalData.Core.Security
+{
+    public class RSADecryptor : RSACryptographer
+    {
+        public string PublicKeyPem => _rsa.ExportRSAPublicKeyPem();
+
+        public RSAEncryptor Encryptor
+        {
+            get
+            {
+                return new ()
+                {
+                    Pem = PublicKeyPem,
+                    Padding = Padding
+                };
+            }
+        }
+
+        public byte[] Decrypt(byte[] data) => _rsa.Decrypt(data, Padding);
+
+        public string Decrypt(string data) => _rsa.Decrypt(data.Base64ToByte(), Padding).BytesToString();
+    }
+}

DigitalData.Core.Security/RSAEncryptor.cs

@@ -0,0 +1,11 @@
+namespace DigitalData.Core.Security
+{
+    public class RSAEncryptor : RSACryptographer
+    {
+        public byte[] Encrypt(byte[] data) => _rsa.Encrypt(data, Padding);
+
+        public string Encrypt(string data) => _rsa.Encrypt(data.Base64ToByte(), Padding).BytesToString();
+
+        public bool Verify(string data, string signature) => Encrypt(data) == signature;
+    }
+}

DigitalData.Core.Security/RSAExtensions.cs

@@ -0,0 +1,14 @@
+using System.Security.Cryptography;
+
+namespace DigitalData.Core.Security
+{
+    public static class RSAExtensions
+    {
+        public static RSA ToRSA(this string pem)
+        {
+            var rsa = RSA.Create();
+            rsa.ImportFromPem(pem);
+            return rsa;
+        }
+    }
+}

DigitalData.Core.Tests/Client/BaseHttpClientServiceTest.cs

@@ -2,7 +2,7 @@
 using DigitalData.Core.Client;
 using Microsoft.Extensions.DependencyInjection;
 
-namespace DigitalData.Core.Tests
+namespace DigitalData.Core.Tests.Client
 {
     [TestFixture]
     public class BaseHttpClientServiceTests

DigitalData.Core.Tests/DigitalData.Core.Tests.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net7.0</TargetFramework>
@@ -26,6 +26,7 @@
     <ProjectReference Include="..\DigitalData.Core.Client\DigitalData.Core.Client.csproj" />
     <ProjectReference Include="..\DigitalData.Core.DTO\DigitalData.Core.DTO.csproj" />
     <ProjectReference Include="..\DigitalData.Core.Infrastructure\DigitalData.Core.Infrastructure.csproj" />
+    <ProjectReference Include="..\DigitalData.Core.Security\DigitalData.Core.Security.csproj" />
   </ItemGroup>
 
 </Project>

DigitalData.Core.Tests/obj/DigitalData.Core.Tests.csproj.nuget.g.props

@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="utf-8" standalone="no"?>
-<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
-    <RestoreSuccess Condition=" '$(RestoreSuccess)' == '' ">True</RestoreSuccess>
-    <RestoreTool Condition=" '$(RestoreTool)' == '' ">NuGet</RestoreTool>
-    <ProjectAssetsFile Condition=" '$(ProjectAssetsFile)' == '' ">$(MSBuildThisFileDirectory)project.assets.json</ProjectAssetsFile>
-    <NuGetPackageRoot Condition=" '$(NuGetPackageRoot)' == '' ">$(UserProfile)\.nuget\packages\</NuGetPackageRoot>
-    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">C:\Users\tekh\.nuget\packages\;D:\ProgramFiles\DevExpress 21.2\Components\Offline Packages</NuGetPackageFolders>
-    <NuGetProjectStyle Condition=" '$(NuGetProjectStyle)' == '' ">PackageReference</NuGetProjectStyle>
-    <NuGetToolVersion Condition=" '$(NuGetToolVersion)' == '' ">6.9.1</NuGetToolVersion>
-  </PropertyGroup>
-  <ItemGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
-    <SourceRoot Include="C:\Users\tekh\.nuget\packages\" />
-    <SourceRoot Include="D:\ProgramFiles\DevExpress 21.2\Components\Offline Packages\" />
-  </ItemGroup>
-  <ImportGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
-    <Import Project="$(NuGetPackageRoot)nunit3testadapter\4.3.0\build\netcoreapp2.1\NUnit3TestAdapter.props" Condition="Exists('$(NuGetPackageRoot)nunit3testadapter\4.3.0\build\netcoreapp2.1\NUnit3TestAdapter.props')" />
-    <Import Project="$(NuGetPackageRoot)nunit\3.13.3\build\NUnit.props" Condition="Exists('$(NuGetPackageRoot)nunit\3.13.3\build\NUnit.props')" />
-    <Import Project="$(NuGetPackageRoot)microsoft.testplatform.testhost\17.3.2\build\netcoreapp2.1\Microsoft.TestPlatform.TestHost.props" Condition="Exists('$(NuGetPackageRoot)microsoft.testplatform.testhost\17.3.2\build\netcoreapp2.1\Microsoft.TestPlatform.TestHost.props')" />
-    <Import Project="$(NuGetPackageRoot)microsoft.codecoverage\17.3.2\build\netstandard1.0\Microsoft.CodeCoverage.props" Condition="Exists('$(NuGetPackageRoot)microsoft.codecoverage\17.3.2\build\netstandard1.0\Microsoft.CodeCoverage.props')" />
-    <Import Project="$(NuGetPackageRoot)microsoft.net.test.sdk\17.3.2\build\netcoreapp2.1\Microsoft.NET.Test.Sdk.props" Condition="Exists('$(NuGetPackageRoot)microsoft.net.test.sdk\17.3.2\build\netcoreapp2.1\Microsoft.NET.Test.Sdk.props')" />
-    <Import Project="$(NuGetPackageRoot)microsoft.entityframeworkcore\7.0.16\buildTransitive\net6.0\Microsoft.EntityFrameworkCore.props" Condition="Exists('$(NuGetPackageRoot)microsoft.entityframeworkcore\7.0.16\buildTransitive\net6.0\Microsoft.EntityFrameworkCore.props')" />
-  </ImportGroup>
-  <PropertyGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
-    <PkgNUnit_Analyzers Condition=" '$(PkgNUnit_Analyzers)' == '' ">C:\Users\tekh\.nuget\packages\nunit.analyzers\3.5.0</PkgNUnit_Analyzers>
-  </PropertyGroup>
-</Project>

DigitalData.Core.sln

@@ -21,6 +21,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DigitalData.Core.Legacy.Tes
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DigitalData.Core.Legacy.Client", "DigitalData.Core.Legacy.Client\DigitalData.Core.Legacy.Client.csproj", "{E009A053-A9F4-48F2-984F-EF5C376A9B14}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DigitalData.Core.Security", "DigitalData.Core.Security\DigitalData.Core.Security.csproj", "{47D80C65-74A2-4EB8-96A5-D571A9108FB3}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -62,6 +64,10 @@ Global
 		{E009A053-A9F4-48F2-984F-EF5C376A9B14}.Debug|Any CPU.Build.0 = Release|Any CPU
 		{E009A053-A9F4-48F2-984F-EF5C376A9B14}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{E009A053-A9F4-48F2-984F-EF5C376A9B14}.Release|Any CPU.Build.0 = Release|Any CPU
+		{47D80C65-74A2-4EB8-96A5-D571A9108FB3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{47D80C65-74A2-4EB8-96A5-D571A9108FB3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{47D80C65-74A2-4EB8-96A5-D571A9108FB3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{47D80C65-74A2-4EB8-96A5-D571A9108FB3}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE