util/hasher.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Security.Cryptography;
+using Microsoft.AspNetCore.Cryptography.KeyDerivation;
+namespace rockfishCore.Util
+{
+    //Authentication controller
+    public static class Hasher
+    {
+
+        public static string hash(string Salt, string Password)
+        {
+
+            //adapted from here:
+            //https://docs.microsoft.com/en-us/aspnet/core/security/data-protection/consumer-apis/password-hashing
+            string hashed = Convert.ToBase64String(KeyDerivation.Pbkdf2(
+                       password: Password,
+                       salt: StringToByteArray(Salt),
+                       prf: KeyDerivationPrf.HMACSHA512,
+                       iterationCount: 10000,
+                       numBytesRequested: 512 / 8));
+            return hashed;
+        }
+
+
+
+        //https://stackoverflow.com/questions/311165/how-do-you-convert-a-byte-array-to-a-hexadecimal-string-and-vice-versa/24343727#24343727
+        public static byte[] StringToByteArray(String hex)
+        {
+            int NumberChars = hex.Length;
+            byte[] bytes = new byte[NumberChars / 2];
+            for (int i = 0; i < NumberChars; i += 2)
+                bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);
+            return bytes;
+        }
+
+    }//eoc
+
+}//eons