rektor(RSA): Umbenennung von dir in cryptographer und Verschiebung der zugehörigen Klassen

DigitalData.Core.Security/Cryptographer/RSADecryptor.cs

@@ -0,0 +1,58 @@
+using DigitalData.Core.Abstractions.Security;
+using DigitalData.Core.Security.Extensions;
+using System.Security.Cryptography;
+
+namespace DigitalData.Core.Security.Cryptographer
+{
+    public class RSADecryptor : RSACryptographer, IRSADecryptor, IRSACryptographer
+    {
+        public (string Value, Version Version)? VersionedPassword
+        {
+            init
+            {
+                _password = value?.Value;
+                PasswordVersion = value?.Version;
+            }
+        }
+
+        private string? _password;
+
+        public Version? PasswordVersion { get; private init; } = null;
+
+        public bool HasEncryptedPem => _password is not null;
+
+        public bool IsEncrypted => _password is not null;
+
+        private readonly Lazy<IRSAEncryptor> _lazyEncryptor;
+
+        public IRSAEncryptor Encryptor => _lazyEncryptor.Value;
+
+        private readonly Lazy<RSA> lazyRSA;
+
+        protected override RSA RSA => lazyRSA.Value;
+
+        public RSADecryptor()
+        {
+            _lazyEncryptor = new(() => new RSAEncryptor()
+            {
+                Pem = RSA.ExportRSAPublicKeyPem(),
+                Padding = Padding
+            });
+
+            lazyRSA = new(() =>
+            {
+                var rsa = RSA.Create();
+                if (_password is null)
+                    RSA.ImportFromPem(Pem);
+                else
+                    RSA.ImportFromEncryptedPem(Pem, _password.AsSpan());
+
+                return rsa;
+            });
+        }
+
+        public byte[] Decrypt(byte[] data) => RSA.Decrypt(data, Padding);
+
+        public string Decrypt(string data) => RSA.Decrypt(data.Base64ToByte(), Padding).BytesToString();
+    }
+}