Enhance Aes256Siv with overloads and update version

Updated the `Aes256Siv` class to include multiple overloads for `Encrypt` and `Decrypt` methods, supporting strings, byte arrays, and streams. Default key parameters were added for easier usage, along with a new `DecryptToBytes` method.

Incremented version in `Pandatech.Crypto.csproj` from `5.0.0` to `5.0.1` and updated release notes to reflect the new AES-SIV implementation, replacing the deprecated AES256 class due to security concerns.

Author: MnatsakanMargaryan

src/Pandatech.Crypto/Helpers/Aes256Siv.cs

@@ -20,12 +20,22 @@ internal static void RegisterKey(string key)
       GlobalKey = key;
    }
 
+   public static byte[] Encrypt(string plaintext)
+   {
+      return Encrypt(plaintext, null);
+   }
+
    public static byte[] Encrypt(string plaintext, string? key = null)
    {
       var bytes = Encoding.UTF8.GetBytes(plaintext);
       return Encrypt(bytes, key);
    }
 
+   public static byte[] Encrypt(byte[] plaintext)
+   {
+      return Encrypt(plaintext, null);
+   }
+
    public static byte[] Encrypt(byte[] plaintext, string? key = null)
    {
       if (plaintext.Length == 0)
@@ -42,6 +52,11 @@ public static byte[] Encrypt(byte[] plaintext, string? key = null)
       return Arrays.Concatenate(siv, cipher);
    }
 
+   public static void Encrypt(Stream input, Stream output)
+   {
+      Encrypt(input, output, null);
+   }
+
    public static void Encrypt(Stream input, Stream output, string? key = null)
    {
       ArgumentNullException.ThrowIfNull(input);
@@ -53,12 +68,22 @@ public static void Encrypt(Stream input, Stream output, string? key = null)
       output.Write(encrypted, 0, encrypted.Length);
    }
 
+   public static string Decrypt(byte[] ciphertext)
+   {
+      return Decrypt(ciphertext, null);
+   }
+
    public static string Decrypt(byte[] ciphertext, string? key = null)
    {
       var plain = DecryptToBytes(ciphertext, key);
       return Encoding.UTF8.GetString(plain);
    }
 
+   public static byte[] DecryptToBytes(byte[] ciphertext)
+   {
+      return DecryptToBytes(ciphertext, null);
+   }
+
    public static byte[] DecryptToBytes(byte[] ciphertext, string? key = null)
    {
       var keyBytes = GetKeyBytes(key);
@@ -86,6 +111,11 @@ public static byte[] DecryptToBytes(byte[] ciphertext, string? key = null)
       return plain;
    }
 
+   public static void Decrypt(Stream input, Stream output)
+   {
+      Decrypt(input, output, null);
+   }
+
    public static void Decrypt(Stream input, Stream output, string? key = null)
    {
       ArgumentNullException.ThrowIfNull(input);

src/Pandatech.Crypto/Pandatech.Crypto.csproj

@@ -8,7 +8,7 @@
         <Copyright>MIT</Copyright>
         <PackageIcon>pandatech.png</PackageIcon>
         <PackageReadmeFile>Readme.md</PackageReadmeFile>
-        <Version>5.0.0</Version>
+        <Version>5.0.1</Version>
         <Title>Pandatech.Crypto</Title>
         <PackageTags>Pandatech, library, encryption, hash, algorythms, security</PackageTags>
         <Description>PandaTech.Crypto is a .NET library simplifying common cryptograhic functions.</Description>