Initial data commit

Task/Parallel-brute-force/Visual-Basic-.NET/parallel-brute-force.vb

@@ -0,0 +1,53 @@
+Imports System.Text
+
+Module Module1
+
+    Function Matches(a As Byte(), b As Byte()) As Boolean
+        For i = 0 To 31
+            If a(i) <> b(i) Then
+                Return False
+            End If
+        Next
+        Return True
+    End Function
+
+    Function StringHashToByteArray(s As String) As Byte()
+        Return Enumerable.Range(0, s.Length / 2).Select(Function(i) CType(Convert.ToInt16(s.Substring(i * 2, 2), 16), Byte)).ToArray
+    End Function
+
+    Sub Main()
+        Dim h1 = StringHashToByteArray("1115dd800feaacefdf481f1f9070374a2a81e27880f187396db67958b207cbad")
+        Dim h2 = StringHashToByteArray("3a7bd3e2360a3d29eea436fcfb7e44c735d117c42d1c1835420b6b9942dd4f1b")
+        Dim h3 = StringHashToByteArray("74e1bb62f8dabb8125a58852b63bdf6eaef667cb56ac7f7cdba6d7305c50a22f")
+
+        Parallel.For(0, 26, Sub(a As Integer)
+                                Dim sha = Security.Cryptography.SHA256.Create()
+                                Dim password(4) As Byte
+                                Dim hash As Byte()
+
+                                password(0) = 97 + a
+
+                                password(1) = 97
+                                While password(1) < 123
+                                    password(2) = 97
+                                    While password(2) < 123
+                                        password(3) = 97
+                                        While password(3) < 123
+                                            password(4) = 97
+                                            While password(4) < 123
+                                                hash = sha.ComputeHash(password)
+                                                If Matches(h1, hash) OrElse Matches(h2, hash) OrElse Matches(h3, hash) Then
+                                                    Console.WriteLine(Encoding.ASCII.GetString(password) + " => " + BitConverter.ToString(hash).ToLower().Replace("-", ""))
+                                                End If
+                                                password(4) += 1
+                                            End While
+                                            password(3) += 1
+                                        End While
+                                        password(2) += 1
+                                    End While
+                                    password(1) += 1
+                                End While
+                            End Sub)
+    End Sub
+
+End Module