Add API

API/TokenGen.cs

@@ -0,0 +1,23 @@
+using System.Security.Cryptography;
+
+namespace API;
+
+public static class TokenGen
+{
+    private const uint MinimumLength = 8;
+    private const string Chars = "abcdefghijklmnopqrstuvwxyz0123456789";
+
+    public static string CreateToken(Type t, uint fullLength) => CreateToken(t.Name, fullLength);
+    
+    public static string CreateToken(string prefix, uint fullLength)
+    {
+        if (prefix.Length + 1 >= fullLength - MinimumLength)
+            throw new ArgumentException("Prefix to long to create Token of meaningful length.");
+        long l = fullLength - prefix.Length - 1;
+        byte[] rng = new byte[l];
+        RandomNumberGenerator.Create().GetBytes(rng);
+        string key = new (rng.Select(b => Chars[b % Chars.Length]).ToArray());
+        key = string.Join('-', prefix, key);
+        return key;
+    }
+}