From 0804ea1418861cc8784bbfb8de0e83e9af2d5286 Mon Sep 17 00:00:00 2001
From: Developer 02 <developer02@didaloghe.onmicrosoft.com>
Date: Sat, 16 Nov 2024 03:24:19 +0100
Subject: [PATCH] =?UTF-8?q?refactor:=20RSA-Kryptografie-Klassen=20f=C3=BCr?=
 =?UTF-8?q?=20bessere=20Flexibilit=C3=A4t=20und=20Effizienz=20=C3=BCberarb?=
 =?UTF-8?q?eitet?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- 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.
---
 DigitalData.Core.Security/RSACryptographer.cs | 21 ++++++++++++++++
 DigitalData.Core.Security/RSADecryptor.cs     | 25 +++++++++++++++++++
 DigitalData.Core.Security/RSAEncryptor.cs     | 11 ++++++++
 3 files changed, 57 insertions(+)
 create mode 100644 DigitalData.Core.Security/RSACryptographer.cs
 create mode 100644 DigitalData.Core.Security/RSADecryptor.cs
 create mode 100644 DigitalData.Core.Security/RSAEncryptor.cs

diff --git a/DigitalData.Core.Security/RSACryptographer.cs b/DigitalData.Core.Security/RSACryptographer.cs
new file mode 100644
index 0000000..bb1942b
--- /dev/null
+++ b/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();
+    }
+}
\ No newline at end of file
diff --git a/DigitalData.Core.Security/RSADecryptor.cs b/DigitalData.Core.Security/RSADecryptor.cs
new file mode 100644
index 0000000..8e558d6
--- /dev/null
+++ b/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();
+    }
+}
\ No newline at end of file
diff --git a/DigitalData.Core.Security/RSAEncryptor.cs b/DigitalData.Core.Security/RSAEncryptor.cs
new file mode 100644
index 0000000..e669e1e
--- /dev/null
+++ b/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;
+    }
+}
\ No newline at end of file