Initial data commit

Task/Parallel-brute-force/C-sharp/parallel-brute-force.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+class Program
+{
+    static void Main(string[] args)
+    {
+        Parallel.For(0, 26, a => {
+            byte[] password = new byte[5];
+            byte[] hash;
+            byte[] one = StringHashToByteArray("1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad");
+            byte[] two = StringHashToByteArray("3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b");
+            byte[] three = StringHashToByteArray("74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f");
+            password[0] = (byte)(97 + a);
+            var sha = System.Security.Cryptography.SHA256.Create();
+            for (password[1] = 97; password[1] < 123; password[1]++)
+                for (password[2] = 97; password[2] < 123; password[2]++)
+                    for (password[3] = 97; password[3] < 123; password[3]++)
+                        for (password[4] = 97; password[4] < 123; password[4]++)
+                        {
+                            hash = sha.ComputeHash(password);
+                            if (matches(one, hash) || matches(two, hash) || matches(three, hash))
+                                Console.WriteLine(Encoding.ASCII.GetString(password) + " => "
+                                    + BitConverter.ToString(hash).ToLower().Replace("-", ""));
+                        }
+        });
+    }
+    static byte[] StringHashToByteArray(string s)
+    {
+        return Enumerable.Range(0, s.Length / 2).Select(i => (byte)Convert.ToInt16(s.Substring(i * 2, 2), 16)).ToArray();
+    }
+    static bool matches(byte[] a, byte[] b)
+    {
+        for (int i = 0; i < 32; i++)
+            if (a[i] != b[i])
+                return false;
+        return true;
+    }
+}