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MareSynchronosServer/MareSynchronosShared/Utils/StringUtils.cs

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+using System.Security.Cryptography;
+using System.Text;
+
+namespace MareSynchronosShared.Utils;
+
+public static class StringUtils
+{
+    public static string GenerateRandomString(int length, string? allowableChars = null)
+    {
+        if (string.IsNullOrEmpty(allowableChars))
+            allowableChars = @"ABCDEFGHJKLMNPQRSTUVWXYZ0123456789";
+
+        // Generate random data
+        var rnd = RandomNumberGenerator.GetBytes(length);
+
+        // Generate the output string
+        var allowable = allowableChars.ToCharArray();
+        var l = allowable.Length;
+        var chars = new char[length];
+        for (var i = 0; i < length; i++)
+            chars[i] = allowable[rnd[i] % l];
+
+        return new string(chars);
+    }
+
+    public static string Sha256String(string input)
+    {
+        using var sha256 = SHA256.Create();
+        return BitConverter.ToString(sha256.ComputeHash(Encoding.UTF8.GetBytes(input))).Replace("-", "", StringComparison.OrdinalIgnoreCase);
+    }
+}
+
+public static class ListUtils
+{
+    private static Random rng = new();
+
+    public static void Shuffle<T>(this IList<T> list)
+    {
+        int n = list.Count;
+        while (n > 1)
+        {
+            n--;
+            int k = rng.Next(n + 1);
+            T value = list[k];
+            list[k] = list[n];
+            list[n] = value;
+        }
+    }
+}