Bảo mật thông tin hệ mã des

3) As Char ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Dim i As Integer For i = 0 To 63 tam(i) = x.Substring(ip(i) - 1, 1) Next Return tam End Function Haøm hoaùn vò e Function hve(ByVal r As String) As String Dim tam(47) As Char Dim i As Integer For i = 0 To 47 tam(i) = r.Substring(e(i) - 1, 1) Next Return tam End Function Function hvp(ByVal c As String) As String Dim tam(31) As Char Dim i As Integer For i = 0 To 31 tam(i) = c.Substring(p(i) - 1, 1) Next Return tam End Function Haøm hoaùn vò ip tröø Function hviptru(ByVal c As String) As String Dim tam(63) As Char Dim i As Integer For i = 0 To 63 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 tam(ip(i) - 1) = c.Substring(i, 1) Next Return tam End Function Maõ hoaù Function mahoa() As String binarynhap() Dim k As Integer Dim y As String For k = 0 To daynhap.Length - 1 'x += "0000000100100011010001010110011110001001101010101100110111101111" x = daynhap(k) Dim x0 As String = hvip(x) Dim l(15) As String Dim r(15) As String Dim i, j As Integer Dim l0 As String = x0.Substring(0, 32) Dim r0 As String = x0.Substring(32, 32) l(0) = r0 For i = 0 To 31 r(0) += (l0.Substring(i, 1) Xor f(r0, daykhoa(0)).Substring(i, 1)).ToString Next For i = 1 To 15 l(i) = r(i - 1) Dim a As String = f(r(i - 1), daykhoa(i)) For j = 0 To 31 r(i) += (l(i - 1).Substring(j, 1) Xor a.Substring(j, 1)).ToString ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Next j Next i Dim v As String = hviptru(r(15) + l(15)) y += v Next k Return y End Function Haøm f Function f(ByVal r As String, ByVal k As String) As String Dim i As Integer Dim e As String Dim hv As String = hve(r) For i = 0 To 47 e += (hv.Substring(i, 1) Xor k.Substring(i, 1)).ToString Next Dim b(7) As String Dim c As String For i = 0 To 7 b(i) = e.Substring(i * 6, 6) Dim haibitcuoi As String = b(i).Substring(0, 1) + b(i).Substring(5, 1) Dim bonbitgiua As String = b(i).Substring(1, 4) Dim srow = thapphan(haibitcuoi) Dim scol = thapphan(bonbitgiua) Dim sij As Integer = s(i).Rows(srow).Item(scol) c += binary(sij) Next c = hvp(c) ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Return c End Function Haøm thaäp phaân Function thapphan(ByVal b As String) As Integer Dim i As Integer Dim tam As Integer = 0 For i = 0 To b.Length - 1 If b.Substring(i, 1) = 1 Then tam += 2 ^ (b.Length - 1 - i) End If Next Return tam End Function Haøm nhò phaân Function binary(ByVal a As Integer) As String Dim i As Integer Dim tam(3) As Char For i = 0 To 3 tam(i) = (a Mod 2).ToString a = a \ 2 Next Array.Reverse(tam) Return tam End Function Haøm ñoåi ra chöõ Function doirachu(ByVal y As String) As String Dim tam As String = y Dim tam1 As String = "" ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Dim so As Integer Dim i As Integer Dim j As Integer While i < tam.Length - 1 so = 0 For j = i To i + 7 If tam.Substring(j, 1) = 1 Then so += 2 ^ (7 - (j - i)) End If Next tam1 += Chr(so) i = i + 8 End While Return tam1 End Function #End Region moät soá haøm duøng ñeå giaûi maõ taïo baûn maõ nhò phaân Sub binaybanma() Dim sodaybanma = txtbanma.Text.Length \ 8 Dim i, j As Integer Dim tam As String ReDim daybanma(sodaybanma - 1) For i = 0 To sodaybanma - 1 daybanma(i) = txtbanma.Text.Substring(i * 8, 8) tam = "" For j = 0 To daybanma(i).Length - 1 tam += bi_acsii(Asc(daybanma(i).Substring(j, 1))) ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Next daybanma(i) = tam Next i End Sub Haøm giaûi maõ Function giaima() As String binaybanma() Dim k As Integer x = "" For k = 0 To daybanma.Length - 1 Dim y0 As String = hvip(daybanma(k)) Dim rr As String = y0.Substring(0, 32) Dim ll As String = y0.Substring(32, 32) Dim i, j As Integer Dim l(15) As String Dim r(15) As String r(15) = ll For i = 0 To 31 l(15) += (rr.Substring(i, 1) Xor f(ll, daykhoa(15)).Substring(i, 1)).ToString Next For i = 14 To 0 Step -1 r(i) = l(i + 1) Dim a As String = f(l(i + 1), daykhoa(i)) For j = 0 To 31 l(i) += (r(i + 1).Substring(j, 1) Xor a.Substring(j, 1)).ToString Next j Next i ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 x += hviptru(l(0) + r(0)) Next k Return x End Function Moät soá söï kieän giuùp cho vieäc thöïc thi Private Sub des_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load khoitao() End Sub Private Sub btlapma_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btlapma.Click khoitao() If txtchuoinhap.Text = "" Then MessageBox.Show("Bạ n hãy nhậ p vào chuỗ i cầ n mã hoá") txtchuoinhap.Focus() Return End If If txtkhoak.Text = "" Or txtkhoak.Text.Length < 8 Then MessageBox.Show("Bạ n hãy nhậ p vào khóa :8 kí tự ") txtkhoak.Focus() Return End If txtdaykhoa.Text = "" taodaykhoa() txtbanmabit.Text = mahoa() txtbanma.Text = doirachu(mahoa()) End Sub Private Sub btthoat_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btthoat.Click ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Me.Close() End Sub Private Sub btgiaima_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btgiaima.Click If txtkhoak.Text = "" Or txtkhoak.Text.Length < 8 Then MessageBox.Show("Bạ n hãy nhậ p khóa : 8 kí tự ") txtkhoak.Focus() Return End If If txtbanma.Text = "" Then MessageBox.Show("Bạ n hãy nhậ p vào chuỗ i cầ n giả i mã") txtbanma.Focus() Return End If txtdaykhoa.Text = "" taodaykhoa() txtbanrobit.Text = giaima() txtbanro.Text = doirachu(giaima()) End Sub End Class Form thaùm maõ Des (thamma.vb) ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Imports System.Windows.Forms Public Class thammades Inherits System.Windows.Forms.Form Khai baùo moät soá bieán vaø haøm Dim banro() As String Dim banma() As String Dim hve(47) As Integer Dim hvp(31) As Integer Dim hvpc2(47) As Integer Dim hvpc1(55) As Integer Dim hvip(63) As Integer Dim e() As String Dim esao() As String Dim ephay() As String Dim cphay() As String ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Dim jhop(7, 63) As Integer Dim s(7) As DataTable Dim chuoikhoa(255) As String Dim daykhoa(2) As String Dim n As Integer '6 ban ro va 6 ban ma Const m = 16 '8 ki tu Const hebit = 4 'he 256 Dim flag As Boolean Khôûi taïo Sub khoitao_s0() Dim i As Integer s(0) = New DataTable For i = 0 To 15 Dim col As DataColumn = New DataColumn s(0).Columns.Add(col) Next For i = 0 To 3 Dim row As DataRow = s(0).NewRow s(0).Rows.Add(row) Next s(0).Rows(0).Item(0) = 14 s(0).Rows(0).Item(1) = 4 s(0).Rows(0).Item(2) = 13 s(0).Rows(0).Item(3) = 1 s(0).Rows(0).Item(4) = 2 s(0).Rows(0).Item(5) = 15 s(0).Rows(0).Item(6) = 11 s(0).Rows(0).Item(7) = 8 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(0).Rows(0).Item(8) = 3 s(0).Rows(0).Item(9) = 10 s(0).Rows(0).Item(10) = 6 s(0).Rows(0).Item(11) = 12 s(0).Rows(0).Item(12) = 5 s(0).Rows(0).Item(13) = 9 s(0).Rows(0).Item(14) = 0 s(0).Rows(0).Item(15) = 7 s(0).Rows(1).Item(0) = 0 s(0).Rows(1).Item(1) = 15 s(0).Rows(1).Item(2) = 7 s(0).Rows(1).Item(3) = 4 s(0).Rows(1).Item(4) = 14 s(0).Rows(1).Item(5) = 2 s(0).Rows(1).Item(6) = 13 s(0).Rows(1).Item(7) = 1 s(0).Rows(1).Item(8) = 10 s(0).Rows(1).Item(9) = 6 s(0).Rows(1).Item(10) = 12 s(0).Rows(1).Item(11) = 11 s(0).Rows(1).Item(12) = 9 s(0).Rows(1).Item(13) = 5 s(0).Rows(1).Item(14) = 3 s(0).Rows(1).Item(15) = 8 s(0).Rows(2).Item(0) = 4 s(0).Rows(2).Item(1) = 1 s(0).Rows(2).Item(2) = 14 s(0).Rows(2).Item(3) = 8 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(0).Rows(2).Item(4) = 13 s(0).Rows(2).Item(5) = 6 s(0).Rows(2).Item(6) = 2 s(0).Rows(2).Item(7) = 11 s(0).Rows(2).Item(8) = 15 s(0).Rows(2).Item(9) = 12 s(0).Rows(2).Item(10) = 9 s(0).Rows(2).Item(11) = 7 s(0).Rows(2).Item(12) = 3 s(0).Rows(2).Item(13) = 10 s(0).Rows(2).Item(14) = 5 s(0).Rows(2).Item(15) = 0 s(0).Rows(3).Item(0) = 15 s(0).Rows(3).Item(1) = 12 s(0).Rows(3).Item(2) = 8 s(0).Rows(3).Item(3) = 2 s(0).Rows(3).Item(4) = 4 s(0).Rows(3).Item(5) = 9 s(0).Rows(3).Item(6) = 1 s(0).Rows(3).Item(7) = 7 s(0).Rows(3).Item(8) = 5 s(0).Rows(3).Item(9) = 11 s(0).Rows(3).Item(10) = 3 s(0).Rows(3).Item(11) = 14 s(0).Rows(3).Item(12) = 10 s(0).Rows(3).Item(13) = 0 s(0).Rows(3).Item(14) = 6 s(0).Rows(3).Item(15) = 13 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 End Sub Khôûi taïo haøm s1 Sub khoitao_s1() Dim i As Integer s(1) = New DataTable For i = 0 To 15 Dim col As DataColumn = New DataColumn s(1).Columns.Add(col) Next For i = 0 To 3 Dim row As DataRow = s(1).NewRow s(1).Rows.Add(row) Next s(1).Rows(0).Item(0) = 15 s(1).Rows(0).Item(1) = 1 s(1).Rows(0).Item(2) = 8 s(1).Rows(0).Item(3) = 14 s(1).Rows(0).Item(4) = 6 s(1).Rows(0).Item(5) = 11 s(1).Rows(0).Item(6) = 3 s(1).Rows(0).Item(7) = 4 s(1).Rows(0).Item(8) = 9 s(1).Rows(0).Item(9) = 7 s(1).Rows(0).Item(10) = 2 s(1).Rows(0).Item(11) = 13 s(1).Rows(0).Item(12) = 12 s(1).Rows(0).Item(13) = 0 s(1).Rows(0).Item(14) = 5 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(1).Rows(0).Item(15) = 10 s(1).Rows(1).Item(0) = 3 s(1).Rows(1).Item(1) = 13 s(1).Rows(1).Item(2) = 4 s(1).Rows(1).Item(3) = 7 s(1).Rows(1).Item(4) = 15 s(1).Rows(1).Item(5) = 2 s(1).Rows(1).Item(6) = 8 s(1).Rows(1).Item(7) = 14 s(1).Rows(1).Item(8) = 12 s(1).Rows(1).Item(9) = 0 s(1).Rows(1).Item(10) = 1 s(1).Rows(1).Item(11) = 10 s(1).Rows(1).Item(12) = 6 s(1).Rows(1).Item(13) = 9 s(1).Rows(1).Item(14) = 11 s(1).Rows(1).Item(15) = 5 s(1).Rows(2).Item(0) = 0 s(1).Rows(2).Item(1) = 14 s(1).Rows(2).Item(2) = 7 s(1).Rows(2).Item(3) = 11 s(1).Rows(2).Item(4) = 10 s(1).Rows(2).Item(5) = 4 s(1).Rows(2).Item(6) = 13 s(1).Rows(2).Item(7) = 1 s(1).Rows(2).Item(8) = 5 s(1).Rows(2).Item(9) = 8 s(1).Rows(2).Item(10) = 12 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(1).Rows(2).Item(11) = 6 s(1).Rows(2).Item(12) = 9 s(1).Rows(2).Item(13) = 3 s(1).Rows(2).Item(14) = 2 s(1).Rows(2).Item(15) = 15 s(1).Rows(3).Item(0) = 13 s(1).Rows(3).Item(1) = 8 s(1).Rows(3).Item(2) = 10 s(1).Rows(3).Item(3) = 1 s(1).Rows(3).Item(4) = 3 s(1).Rows(3).Item(5) = 15 s(1).Rows(3).Item(6) = 4 s(1).Rows(3).Item(7) = 2 s(1).Rows(3).Item(8) = 11 s(1).Rows(3).Item(9) = 6 s(1).Rows(3).Item(10) = 7 s(1).Rows(3).Item(11) = 12 s(1).Rows(3).Item(12) = 0 s(1).Rows(3).Item(13) = 5 s(1).Rows(3).Item(14) = 14 s(1).Rows(3).Item(15) = 9 End Sub Khôûi taïo haøm s2 Sub khoitao_s2() Dim i As Integer s(2) = New DataTable For i = 0 To 15 Dim col As DataColumn = New DataColumn ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(2).Columns.Add(col) Next For i = 0 To 3 Dim row As DataRow = s(2).NewRow s(2).Rows.Add(row) Next s(2).Rows(0).Item(0) = 10 s(2).Rows(0).Item(1) = 0 s(2).Rows(0).Item(2) = 9 s(2).Rows(0).Item(3) = 14 s(2).Rows(0).Item(4) = 6 s(2).Rows(0).Item(5) = 3 s(2).Rows(0).Item(6) = 15 s(2).Rows(0).Item(7) = 5 s(2).Rows(0).Item(8) = 1 s(2).Rows(0).Item(9) = 13 s(2).Rows(0).Item(10) = 12 s(2).Rows(0).Item(11) = 7 s(2).Rows(0).Item(12) = 11 s(2).Rows(0).Item(13) = 4 s(2).Rows(0).Item(14) = 2 s(2).Rows(0).Item(15) = 8 s(2).Rows(1).Item(0) = 13 s(2).Rows(1).Item(1) = 7 s(2).Rows(1).Item(2) = 0 s(2).Rows(1).Item(3) = 9 s(2).Rows(1).Item(4) = 3 s(2).Rows(1).Item(5) = 4 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(2).Rows(1).Item(6) = 6 s(2).Rows(1).Item(7) = 10 s(2).Rows(1).Item(8) = 2 s(2).Rows(1).Item(9) = 8 s(2).Rows(1).Item(10) = 5 s(2).Rows(1).Item(11) = 14 s(2).Rows(1).Item(12) = 12 s(2).Rows(1).Item(13) = 11 s(2).Rows(1).Item(14) = 15 s(2).Rows(1).Item(15) = 1 s(2).Rows(2).Item(0) = 13 s(2).Rows(2).Item(1) = 6 s(2).Rows(2).Item(2) = 4 s(2).Rows(2).Item(3) = 9 s(2).Rows(2).Item(4) = 8 s(2).Rows(2).Item(5) = 15 s(2).Rows(2).Item(6) = 3 s(2).Rows(2).Item(7) = 0 s(2).Rows(2).Item(8) = 11 s(2).Rows(2).Item(9) = 1 s(2).Rows(2).Item(10) = 2 s(2).Rows(2).Item(11) = 12 s(2).Rows(2).Item(12) = 5 s(2).Rows(2).Item(13) = 10 s(2).Rows(2).Item(14) = 14 s(2).Rows(2).Item(15) = 7 s(2).Rows(3).Item(0) = 1 s(2).Rows(3).Item(1) = 10 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(2).Rows(3).Item(2) = 13 s(2).Rows(3).Item(3) = 0 s(2).Rows(3).Item(4) = 6 s(2).Rows(3).Item(5) = 9 s(2).Rows(3).Item(6) = 8 s(2).Rows(3).Item(7) = 7 s(2).Rows(3).Item(8) = 4 s(2).Rows(3).Item(9) = 15 s(2).Rows(3).Item(10) = 14 s(2).Rows(3).Item(11) = 3 s(2).Rows(3).Item(12) = 11 s(2).Rows(3).Item(13) = 5 s(2).Rows(3).Item(14) = 3 s(2).Rows(3).Item(15) = 12 End Sub Khôûi taïo haøm s3 Sub khoitao_s3() Dim i As Integer s(3) = New DataTable For i = 0 To 15 Dim col As DataColumn = New DataColumn s(3).Columns.Add(col) Next For i = 0 To 3 Dim row As DataRow = s(3).NewRow s(3).Rows.Add(row) Next s(3).Rows(0).Item(0) = 7 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(3).Rows(0).Item(1) = 13 s(3).Rows(0).Item(2) = 14 s(3).Rows(0).Item(3) = 3 s(3).Rows(0).Item(4) = 0 s(3).Rows(0).Item(5) = 6 s(3).Rows(0).Item(6) = 9 s(3).Rows(0).Item(7) = 10 s(3).Rows(0).Item(8) = 1 s(3).Rows(0).Item(9) = 2 s(3).Rows(0).Item(10) = 8 s(3).Rows(0).Item(11) = 5 s(3).Rows(0).Item(12) = 11 s(3).Rows(0).Item(13) = 12 s(3).Rows(0).Item(14) = 4 s(3).Rows(0).Item(15) = 15 s(3).Rows(1).Item(0) = 13 s(3).Rows(1).Item(1) = 8 s(3).Rows(1).Item(2) = 11 s(3).Rows(1).Item(3) = 5 s(3).Rows(1).Item(4) = 6 s(3).Rows(1).Item(5) = 15 s(3).Rows(1).Item(6) = 0 s(3).Rows(1).Item(7) = 3 s(3).Rows(1).Item(8) = 4 s(3).Rows(1).Item(9) = 7 s(3).Rows(1).Item(10) = 2 s(3).Rows(1).Item(11) = 12 s(3).Rows(1).Item(12) = 1 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(3).Rows(1).Item(13) = 10 s(3).Rows(1).Item(14) = 14 s(3).Rows(1).Item(15) = 9 s(3).Rows(2).Item(0) = 10 s(3).Rows(2).Item(1) = 6 s(3).Rows(2).Item(2) = 9 s(3).Rows(2).Item(3) = 0 s(3).Rows(2).Item(4) = 12 s(3).Rows(2).Item(5) = 11 s(3).Rows(2).Item(6) = 7 s(3).Rows(2).Item(7) = 13 s(3).Rows(2).Item(8) = 15 s(3).Rows(2).Item(9) = 1 s(3).Rows(2).Item(10) = 3 s(3).Rows(2).Item(11) = 14 s(3).Rows(2).Item(12) = 5 s(3).Rows(2).Item(13) = 2 s(3).Rows(2).Item(14) = 8 s(3).Rows(2).Item(15) = 4 s(3).Rows(3).Item(0) = 3 s(3).Rows(3).Item(1) = 15 s(3).Rows(3).Item(2) = 0 s(3).Rows(3).Item(3) = 6 s(3).Rows(3).Item(4) = 10 s(3).Rows(3).Item(5) = 1 s(3).Rows(3).Item(6) = 13 s(3).Rows(3).Item(7) = 8 s(3).Rows(3).Item(8) = 9 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(3).Rows(3).Item(9) = 4 s(3).Rows(3).Item(10) = 5 s(3).Rows(3).Item(11) = 11 s(3).Rows(3).Item(12) = 12 s(3).Rows(3).Item(13) = 7 s(3).Rows(3).Item(14) = 2 s(3).Rows(3).Item(15) = 14 End Sub Khôûi taïo haøm s4 Sub khoitao_s4() Dim i As Integer s(4) = New DataTable For i = 0 To 15 Dim col As DataColumn = New DataColumn s(4).Columns.Add(col) Next For i = 0 To 3 Dim row As DataRow = s(4).NewRow s(4).Rows.Add(row) Next s(4).Rows(0).Item(0) = 2 s(4).Rows(0).Item(1) = 12 s(4).Rows(0).Item(2) = 4 s(4).Rows(0).Item(3) = 1 s(4).Rows(0).Item(4) = 7 s(4).Rows(0).Item(5) = 10 s(4).Rows(0).Item(6) = 11 s(4).Rows(0).Item(7) = 6 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(4).Rows(0).Item(8) = 8 s(4).Rows(0).Item(9) = 5 s(4).Rows(0).Item(10) = 3 s(4).Rows(0).Item(11) = 15 s(4).Rows(0).Item(12) = 13 s(4).Rows(0).Item(13) = 0 s(4).Rows(0).Item(14) = 14 s(4).Rows(0).Item(15) = 9 s(4).Rows(1).Item(0) = 14 s(4).Rows(1).Item(1) = 11 s(4).Rows(1).Item(2) = 2 s(4).Rows(1).Item(3) = 12 s(4).Rows(1).Item(4) = 4 s(4).Rows(1).Item(5) = 7 s(4).Rows(1).Item(6) = 13 s(4).Rows(1).Item(7) = 1 s(4).Rows(1).Item(8) = 5 s(4).Rows(1).Item(9) = 0 s(4).Rows(1).Item(10) = 15 s(4).Rows(1).Item(11) = 10 s(4).Rows(1).Item(12) = 3 s(4).Rows(1).Item(13) = 9 s(4).Rows(1).Item(14) = 8 s(4).Rows(1).Item(15) = 6 s(4).Rows(2).Item(0) = 4 s(4).Rows(2).Item(1) = 2 s(4).Rows(2).Item(2) = 1 s(4).Rows(2).Item(3) = 11 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(4).Rows(2).Item(4) = 10 s(4).Rows(2).Item(5) = 13 s(4).Rows(2).Item(6) = 7 s(4).Rows(2).Item(7) = 8 s(4).Rows(2).Item(8) = 15 s(4).Rows(2).Item(9) = 9 s(4).Rows(2).Item(10) = 12 s(4).Rows(2).Item(11) = 5 s(4).Rows(2).Item(12) = 6 s(4).Rows(2).Item(13) = 3 s(4).Rows(2).Item(14) = 0 s(4).Rows(2).Item(15) = 14 s(4).Rows(3).Item(0) = 11 s(4).Rows(3).Item(1) = 8 s(4).Rows(3).Item(2) = 12 s(4).Rows(3).Item(3) = 7 s(4).Rows(3).Item(4) = 0 s(4).Rows(3).Item(5) = 14 s(4).Rows(3).Item(6) = 2 s(4).Rows(3).Item(7) = 13 s(4).Rows(3).Item(8) = 6 s(4).Rows(3).Item(9) = 15 s(4).Rows(3).Item(10) = 0 s(4).Rows(3).Item(11) = 9 s(4).Rows(3).Item(12) = 10 s(4).Rows(3).Item(13) = 4 s(4).Rows(3).Item(14) = 5 s(4).Rows(3).Item(15) = 3 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 End Sub Khôûi taïo haøm s5 Sub khoitao_s5() Dim i As Integer s(5) = New DataTable For i = 0 To 15 Dim col As DataColumn = New DataColumn s(5).Columns.Add(col) Next For i = 0 To 3 Dim row As DataRow = s(5).NewRow s(5).Rows.Add(row) Next s(5).Rows(0).Item(0) = 12 s(5).Rows(0).Item(1) = 1 s(5).Rows(0).Item(2) = 10 s(5).Rows(0).Item(3) = 15 s(5).Rows(0).Item(4) = 9 s(5).Rows(0).Item(5) = 2 s(5).Rows(0).Item(6) = 6 s(5).Rows(0).Item(7) = 8 s(5).Rows(0).Item(8) = 0 s(5).Rows(0).Item(9) = 13 s(5).Rows(0).Item(10) = 3 s(5).Rows(0).Item(11) = 4 s(5).Rows(0).Item(12) = 14 s(5).Rows(0).Item(13) = 7 s(5).Rows(0).Item(14) = 5 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(5).Rows(0).Item(15) = 11 s(5).Rows(1).Item(0) = 10 s(5).Rows(1).Item(1) = 15 s(5).Rows(1).Item(2) = 4 s(5).Rows(1).Item(3) = 2 s(5).Rows(1).Item(4) = 7 s(5).Rows(1).Item(5) = 12 s(5).Rows(1).Item(6) = 9 s(5).Rows(1).Item(7) = 5 s(5).Rows(1).Item(8) = 6 s(5).Rows(1).Item(9) = 1 s(5).Rows(1).Item(10) = 13 s(5).Rows(1).Item(11) = 14 s(5).Rows(1).Item(12) = 0 s(5).Rows(1).Item(13) = 11 s(5).Rows(1).Item(14) = 3 s(5).Rows(1).Item(15) = 8 s(5).Rows(2).Item(0) = 9 s(5).Rows(2).Item(1) = 14 s(5).Rows(2).Item(2) = 15 s(5).Rows(2).Item(3) = 5 s(5).Rows(2).Item(4) = 2 s(5).Rows(2).Item(5) = 8 s(5).Rows(2).Item(6) = 12 s(5).Rows(2).Item(7) = 3 s(5).Rows(2).Item(8) = 7 s(5).Rows(2).Item(9) = 0 s(5).Rows(2).Item(10) = 4 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(5).Rows(2).Item(11) = 10 s(5).Rows(2).Item(12) = 1 s(5).Rows(2).Item(13) = 13 s(5).Rows(2).Item(14) = 11 s(5).Rows(2).Item(15) = 6 s(5).Rows(3).Item(0) = 4 s(5).Rows(3).Item(1) = 3 s(5).Rows(3).Item(2) = 2 s(5).Rows(3).Item(3) = 12 s(5).Rows(3).Item(4) = 9 s(5).Rows(3).Item(5) = 5 s(5).Rows(3).Item(6) = 15 s(5).Rows(3).Item(7) = 10 s(5).Rows(3).Item(8) = 11 s(5).Rows(3).Item(9) = 14 s(5).Rows(3).Item(10) = 1 s(5).Rows(3).Item(11) = 7 s(5).Rows(3).Item(12) = 6 s(5).Rows(3).Item(13) = 0 s(5).Rows(3).Item(14) = 8 s(5).Rows(3).Item(15) = 13 End Sub Khôûi taïo haøm s6 Sub khoitao_s6() Dim i As Integer s(6) = New DataTable For i = 0 To 15 Dim col As DataColumn = New DataColumn ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(6).Columns.Add(col) Next For i = 0 To 3 Dim row As DataRow = s(6).NewRow s(6).Rows.Add(row) Next s(6).Rows(0).Item(0) = 4 s(6).Rows(0).Item(1) = 11 s(6).Rows(0).Item(2) = 2 s(6).Rows(0).Item(3) = 14 s(6).Rows(0).Item(4) = 15 s(6).Rows(0).Item(5) = 0 s(6).Rows(0).Item(6) = 8 s(6).Rows(0).Item(7) = 13 s(6).Rows(0).Item(8) = 3 s(6).Rows(0).Item(9) = 12 s(6).Rows(0).Item(10) = 9 s(6).Rows(0).Item(11) = 7 s(6).Rows(0).Item(12) = 5 s(6).Rows(0).Item(13) = 10 s(6).Rows(0).Item(14) = 6 s(6).Rows(0).Item(15) = 1 s(6).Rows(1).Item(0) = 13 s(6).Rows(1).Item(1) = 0 s(6).Rows(1).Item(2) = 11 s(6).Rows(1).Item(3) = 7 s(6).Rows(1).Item(4) = 4 s(6).Rows(1).Item(5) = 9 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(6).Rows(1).Item(6) = 1 s(6).Rows(1).Item(7) = 10 s(6).Rows(1).Item(8) = 14 s(6).Rows(1).Item(9) = 3 s(6).Rows(1).Item(10) = 5 s(6).Rows(1).Item(11) = 12 s(6).Rows(1).Item(12) = 2 s(6).Rows(1).Item(13) = 15 s(6).Rows(1).Item(14) = 8 s(6).Rows(1).Item(15) = 6 s(6).Rows(2).Item(0) = 1 s(6).Rows(2).Item(1) = 4 s(6).Rows(2).Item(2) = 11 s(6).Rows(2).Item(3) = 13 s(6).Rows(2).Item(4) = 12 s(6).Rows(2).Item(5) = 3 s(6).Rows(2).Item(6) = 7 s(6).Rows(2).Item(7) = 14 s(6).Rows(2).Item(8) = 10 s(6).Rows(2).Item(9) = 15 s(6).Rows(2).Item(10) = 6 s(6).Rows(2).Item(11) = 8 s(6).Rows(2).Item(12) = 0 s(6).Rows(2).Item(13) = 5 s(6).Rows(2).Item(14) = 9 s(6).Rows(2).Item(15) = 2 s(6).Rows(3).Item(0) = 6 s(6).Rows(3).Item(1) = 11 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(6).Rows(3).Item(2) = 13 s(6).Rows(3).Item(3) = 8 s(6).Rows(3).Item(4) = 1 s(6).Rows(3).Item(5) = 4 s(6).Rows(3).Item(6) = 10 s(6).Rows(3).Item(7) = 7 s(6).Rows(3).Item(8) = 9 s(6).Rows(3).Item(9) = 5 s(6).Rows(3).Item(10) = 0 s(6).Rows(3).Item(11) = 15 s(6).Rows(3).Item(12) = 14 s(6).Rows(3).Item(13) = 2 s(6).Rows(3).Item(14) = 3 s(6).Rows(3).Item(15) = 12 End Sub Khôûi taïo haøm s7 Sub khoitao_s7() Dim i As Integer s(7) = New DataTable For i = 0 To 15 Dim col As DataColumn = New DataColumn s(7).Columns.Add(col) Next For i = 0 To 3 Dim row As DataRow = s(7).NewRow s(7).Rows.Add(row) Next s(7).Rows(0).Item(0) = 13 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(7).Rows(0).Item(1) = 2 s(7).Rows(0).Item(2) = 8 s(7).Rows(0).Item(3) = 4 s(7).Rows(0).Item(4) = 6 s(7).Rows(0).Item(5) = 15 s(7).Rows(0).Item(6) = 11 s(7).Rows(0).Item(7) = 1 s(7).Rows(0).Item(8) = 10 s(7).Rows(0).Item(9) = 9 s(7).Rows(0).Item(10) = 3 s(7).Rows(0).Item(11) = 14 s(7).Rows(0).Item(12) = 5 s(7).Rows(0).Item(13) = 0 s(7).Rows(0).Item(14) = 12 s(7).Rows(0).Item(15) = 7 s(7).Rows(1).Item(0) = 1 s(7).Rows(1).Item(1) = 15 s(7).Rows(1).Item(2) = 13 s(7).Rows(1).Item(3) = 8 s(7).Rows(1).Item(4) = 10 s(7).Rows(1).Item(5) = 3 s(7).Rows(1).Item(6) = 7 s(7).Rows(1).Item(7) = 4 s(7).Rows(1).Item(8) = 12 s(7).Rows(1).Item(9) = 5 s(7).Rows(1).Item(10) = 6 s(7).Rows(1).Item(11) = 11 s(7).Rows(1).Item(12) = 0 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(7).Rows(1).Item(13) = 14 s(7).Rows(1).Item(14) = 9 s(7).Rows(1).Item(15) = 2 s(7).Rows(2).Item(0) = 7 s(7).Rows(2).Item(1) = 11 s(7).Rows(2).Item(2) = 4 s(7).Rows(2).Item(3) = 1 s(7).Rows(2).Item(4) = 9 s(7).Rows(2).Item(5) = 12 s(7).Rows(2).Item(6) = 14 s(7).Rows(2).Item(7) = 2 s(7).Rows(2).Item(8) = 0 s(7).Rows(2).Item(9) = 6 s(7).Rows(2).Item(10) = 10 s(7).Rows(2).Item(11) = 13 s(7).Rows(2).Item(12) = 15 s(7).Rows(2).Item(13) = 3 s(7).Rows(2).Item(14) = 5 s(7).Rows(2).Item(15) = 8 s(7).Rows(3).Item(0) = 2 s(7).Rows(3).Item(1) = 1 s(7).Rows(3).Item(2) = 14 s(7).Rows(3).Item(3) = 7 s(7).Rows(3).Item(4) = 4 s(7).Rows(3).Item(5) = 10 s(7).Rows(3).Item(6) = 8 s(7).Rows(3).Item(7) = 13 s(7).Rows(3).Item(8) = 15 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 s(7).Rows(3).Item(9) = 12 s(7).Rows(3).Item(10) = 9 s(7).Rows(3).Item(11) = 0 s(7).Rows(3).Item(12) = 3 s(7).Rows(3).Item(13) = 5 s(7).Rows(3).Item(14) = 6 s(7).Rows(3).Item(15) = 11 End Sub Khôûi taïo hoaùn vò e Sub khoitao_hve() hve(0) = 32 hve(1) = 1 hve(2) = 2 hve(3) = 3 hve(4) = 4 hve(5) = 5 hve(6) = 4 hve(7) = 5 hve(8) = 6 hve(9) = 7 hve(10) = 8 hve(11) = 9 hve(12) = 8 hve(13) = 9 hve(14) = 10 hve(15) = 11 hve(16) = 12 hve(17) = 13 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 hve(18) = 12 hve(19) = 13 hve(20) = 14 hve(21) = 15 hve(22) = 16 hve(23) = 17 hve(24) = 16 hve(25) = 17 hve(26) = 18 hve(27) = 19 hve(28) = 20 hve(29) = 21 hve(30) = 20 hve(31) = 21 hve(32) = 22 hve(33) = 23 hve(34) = 24 hve(35) = 25 hve(36) = 24 hve(37) = 25 hve(38) = 26 hve(39) = 27 hve(40) = 28 hve(41) = 29 hve(42) = 28 hve(43) = 29 hve(44) = 30 hve(45) = 31 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 hve(46) = 32 hve(47) = 1 End Sub Khôûi taïo hoaùn vò p Sub khoitao_hvp() hvp(0) = 16 hvp(1) = 7 hvp(2) = 20 hvp(3) = 21 hvp(4) = 29 hvp(5) = 12 hvp(6) = 28 hvp(7) = 17 hvp(8) = 1 hvp(9) = 15 hvp(10) = 23 hvp(11) = 26 hvp(12) = 5 hvp(13) = 18 hvp(14) = 31 hvp(15) = 10 hvp(16) = 2 hvp(17) = 8 hvp(18) = 24 hvp(19) = 14 hvp(20) = 32 hvp(21) = 27 hvp(22) = 3 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 hvp(23) = 9 hvp(24) = 19 hvp(25) = 13 hvp(26) = 30 hvp(27) = 6 hvp(28) = 22 hvp(29) = 11 hvp(30) = 4 hvp(31) = 25 End Sub Khôûi taïo hoaùn vò pc2 Sub khoitao_hvpc2() hvpc2(0) = 14 hvpc2(1) = 17 hvpc2(2) = 11 hvpc2(3) = 24 hvpc2(4) = 1 hvpc2(5) = 5 hvpc2(6) = 3 hvpc2(7) = 28 hvpc2(8) = 15 hvpc2(9) = 6 hvpc2(10) = 21 hvpc2(11) = 10 hvpc2(12) = 23 hvpc2(13) = 19 hvpc2(14) = 12 hvpc2(15) = 4 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 hvpc2(16) = 26 hvpc2(17) = 8 hvpc2(18) = 16 hvpc2(19) = 7 hvpc2(20) = 27 hvpc2(21) = 20 hvpc2(22) = 13 hvpc2(23) = 2 hvpc2(24) = 41 hvpc2(25) = 52 hvpc2(26) = 31 hvpc2(27) = 37 hvpc2(28) = 47 hvpc2(29) = 55 hvpc2(30) = 30 hvpc2(31) = 40 hvpc2(32) = 51 hvpc2(33) = 45 hvpc2(34) = 33 hvpc2(35) = 48 hvpc2(36) = 44 hvpc2(37) = 49 hvpc2(38) = 39 hvpc2(39) = 56 hvpc2(40) = 34 hvpc2(41) = 53 hvpc2(42) = 46 hvpc2(43) = 42 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 hvpc2(44) = 50 hvpc2(45) = 36 hvpc2(46) = 29 hvpc2(47) = 32 End Sub Khôûi taïo hoaù vò pc1 Sub khoitao_hvpc1() hvpc1(0) = 57 hvpc1(1) = 49 hvpc1(2) = 41 hvpc1(3) = 33 hvpc1(4) = 25 hvpc1(5) = 17 hvpc1(6) = 9 hvpc1(7) = 1 hvpc1(8) = 58 hvpc1(9) = 50 hvpc1(10) = 42 hvpc1(11) = 34 hvpc1(12) = 26 hvpc1(13) = 18 hvpc1(14) = 10 hvpc1(15) = 2 hvpc1(16) = 59 hvpc1(17) = 51 hvpc1(18) = 43 hvpc1(19) = 35 hvpc1(20) = 27 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 hvpc1(21) = 19 hvpc1(22) = 11 hvpc1(23) = 3 hvpc1(24) = 60 hvpc1(25) = 52 hvpc1(26) = 44 hvpc1(27) = 36 hvpc1(28) = 63 hvpc1(29) = 55 hvpc1(30) = 47 hvpc1(31) = 39 hvpc1(32) = 31 hvpc1(33) = 23 hvpc1(34) = 15 hvpc1(35) = 7 hvpc1(36) = 62 hvpc1(37) = 54 hvpc1(38) = 46 hvpc1(39) = 38 hvpc1(40) = 30 hvpc1(41) = 22 hvpc1(42) = 14 hvpc1(43) = 6 hvpc1(44) = 61 hvpc1(45) = 53 hvpc1(46) = 45 hvpc1(47) = 37 hvpc1(48) = 29 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 hvpc1(49) = 21 hvpc1(50) = 13 hvpc1(51) = 5 hvpc1(52) = 28 hvpc1(53) = 20 hvpc1(54) = 12 hvpc1(55) = 4 End Sub Khôûi taïo hoaù vò ip Sub khoitao_hvip() hvip(0) = 58 hvip(1) = 50 hvip(2) = 42 hvip(3) = 34 hvip(4) = 26 hvip(5) = 18 hvip(6) = 10 hvip(7) = 2 hvip(8) = 60 hvip(9) = 52 hvip(10) = 44 hvip(11) = 36 hvip(12) = 28 hvip(13) = 20 hvip(14) = 12 hvip(15) = 4 hvip(16) = 62 hvip(17) = 54 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 hvip(18) = 46 hvip(19) = 38 hvip(20) = 30 hvip(21) = 22 hvip(22) = 14 hvip(23) = 6 hvip(24) = 64 hvip(25) = 56 hvip(26) = 48 hvip(27) = 40 hvip(28) = 32 hvip(29) = 24 hvip(30) = 16 hvip(31) = 8 hvip(32) = 57 hvip(33) = 49 hvip(34) = 41 hvip(35) = 33 hvip(36) = 25 hvip(37) = 17 hvip(38) = 9 hvip(39) = 1 hvip(40) = 59 hvip(41) = 51 hvip(42) = 43 hvip(43) = 35 hvip(44) = 27 hvip(45) = 19 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 hvip(46) = 11 hvip(47) = 3 hvip(48) = 61 hvip(49) = 53 hvip(50) = 45 hvip(51) = 37 hvip(52) = 29 hvip(53) = 21 hvip(54) = 13 hvip(55) = 5 hvip(56) = 63 hvip(57) = 55 hvip(58) = 47 hvip(59) = 39 hvip(60) = 31 hvip(61) = 23 hvip(62) = 15 hvip(63) = 7 End Sub Khôûi taïo caùc haøm Sub khoitao() khoitao_s0() khoitao_s1() khoitao_s2() khoitao_s3() khoitao_s4() khoitao_s5() khoitao_s6() ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 khoitao_s7() khoitao_hve() khoitao_hvp() khoitao_hvpc2() khoitao_hvpc1() khoitao_hvip() End Sub caùc haøm hoaùn vò Haøm hoaùn vò ip Function hoanvi_ip(ByVal x As String) As String Dim tam(63) As Char Dim i As Integer For i = 0 To 63 tam(i) = x.Substring(hvip(i) - 1, 1) Next Return tam End Function Haøm hoaùn vò iptru Function hoanvi_iptru(ByVal c As String) As String Dim tam(63) As Char Dim i As Integer For i = 0 To 63 tam(hvip(i) - 1) = c.Substring(i, 1) Next Return tam End Function Haøm hoaùn vò e Function hoanvi_e(ByVal r As String) As String ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Dim tam(47) As Char Dim i As Integer For i = 0 To 47 tam(i) = r.Substring(hve(i) - 1, 1) Next Return tam End Function Haøm hoaùn vò p Function hoanvi_p(ByVal c As String) As String Dim tam(31) As Char Dim i As Integer For i = 0 To 31 tam(i) = c.Substring(hvp(i) - 1, 1) Next Return tam End Function Haøm hoaùn vò ptru Function hoanvi_ptru(ByVal c As String) As String Dim tam(31) As Char Dim i As Integer For i = 0 To 31 tam(hvp(i) - 1) = c.Substring(i, 1) Next Return tam End Function Haøm hoaùn vò pc1 Function hoanvi_pc1(ByVal k As String) As String Dim tam(63) As Char ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Dim i As Integer For i = 0 To 63 tam(i) = k.Substring(i, 1) Next tam = catbitcuoi(tam) For i = 0 To 55 tam(i) = k.Substring(Integer.Parse(hvpc1(i) - 1), 1) Next Return tam End Function Haøm hoaùn vò pc1tru Function hoanvi_pc1tru(ByVal c As String) As String Dim tam(63) As Char Dim i As Integer For i = 0 To 63 tam(i) = "#" Next For i = 0 To 55 tam(hvpc1(i) - 1) = c.Substring(i, 1) Next Dim tam1 As String Return tam End Function Haøm hoaùn vò pc2 Function hoanvi_pc2(ByVal str As String) As String Dim tam(47) As Char Dim i As Integer ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 For i = 0 To 47 tam(i) = str.Substring(Integer.Parse(hvpc2(i) - 1), 1) Next Return tam End Function Haøm hoaùn vò pc2tru Function hoanvi_pc2tru(ByVal c As String) As String Dim tam(55) As Char Dim i As Integer For i = 0 To 55 tam(i) = "?" Next For i = 0 To 47 tam(hvpc2(i) - 1) = c.Substring(i, 1) Next Return tam End Function gan va kiem tra du lieu nhap haøm gaùn döõ lieäu Function gandulieu() As Boolean Try Dim i As Integer = 0 Dim j As Integer Dim strbanro As String = txtbanro.Text.Replace(Chr(10), "") Dim strbanma As String = txtbanma.Text.Replace(Chr(10), "") banro = strbanro.Split(Chr(13)) banma = strbanma.Split(Chr(13)) n = banro.Length - 1 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 ReDim e((n - 1) / 2) ReDim esao((n - 1) / 2) ReDim ephay((n - 1) / 2) ReDim cphay((n - 1) / 2) If (banro.Length - 1 < n Or banma.Length - 1 < n) Then MessageBox.Show("thiế u bả n rõ hay bả n mã") Return False Else Return True End If Catch ex As Exception MessageBox.Show("Dữ liệ u nhậ p không hợ p lệ ") Return False End Try End Function Haøm kieåm tra Function kiemtra() As Boolean Dim i As Integer For i = 0 To n If banro(i) = "" Then MessageBox.Show("baïn nhaäp chöa ñuû " & (i + 1)) Return False End If If banro(i).Length m Then MessageBox.Show( (i + 1) & m ) Return False End If Next ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 For i = 0 To n If banma(i) = "" Then MessageBox.Show("Bạ n hãy nhậ p vào bả n mã thứ " & (i + 1)) Return False End If If banma(i).Length m Then MessageBox.Show("Bả n mã " & (i + 1) & " phả i có " & m & " kí tự ") Return False End If Next i = 0 While i <= n If banro(i).Substring(m / 2, m / 2) banro(i + 1).Substring(m / 2, m / 2) Then MessageBox.Show("Dữ liệ u bả n rõ " & (i + 1) & " , " & (i + 2) & " nhậ p không hợ p lệ ") Return False End If i = i + 2 End While Return True End Function xu li e_esao_ephay_cphay xöû lyù e, e sao, e phaåy Sub xuli_e_esao_ephay() Dim i As Integer 'e(0)= ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 "000000000111111000001110100000000110100000001100" 'e(1)= "101000001011111111110100000101010000001011110110" 'e(2)= "111011110001010100000110100011110110100101011111" 'esao(0)="101111110000001010101100000001010100000001010010" 'esao(1)="100010100110101001011110101111110010100010101010" 'esao(2) = "000001011110100110100010101111110101011000000100" For i = 0 To (n - 1) / 2 Dim l3 = banma(i * 2).Substring(0, 32) Dim l3sao = banma(i * 2 + 1).Substring(0, 32) e(i) = hoanvi_e(l3) esao(i) = hoanvi_e(l3sao) ephay(i) = phay(e(i), esao(i)) Next End Sub Function phay(ByVal a As String, ByVal b As String) As String Dim i As Integer Dim c As String For i = 0 To a.Length - 1 c += (a.Substring(i, 1) Xor b.Substring(i, 1)).ToString Next Return c End Function Xöû lyù c phaåy Sub xuli_cphay() Dim i, j As Integer For i = 0 To (n - 1) / 2 Dim r3 As String = banma(i * 2).Substring(32, 32) ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Dim r3sao As String = banma(i * 2 + 1).Substring(32, 32) Dim l0 As String = banro(i * 2).Substring(0, 32) Dim l0sao As String = banro(i * 2 + 1).Substring(0, 32) Dim r3phay As String = "" Dim l0phay As String = "" For j = 0 To 31 r3phay += (r3.Substring(j, 1) Xor r3sao.Substring(j, 1)).ToString l0phay += (l0.Substring(j, 1) Xor l0sao.Substring(j, 1)).ToString cphay(i) += (r3phay.Substring(j, 1) Xor l0phay.Substring(j, 1)).ToString Next cphay(i) = hoanvi_ptru(cphay(i)) Next 'cphay(0) = "10010110010111010101101101100111" 'cphay(1) = "10011100100111000001111101010110" 'cphay(2) = "11010101011101011101101100101011" End Sub cac ham chuyen doi Function bi_str(ByVal a As String) As String Dim i As Integer Dim b As String For i = 0 To a.Length - 1 b += binary(asc(a.Substring(i, 1)), hebit) Next Return b End Function Sub bi_banro_banma() Dim i As Integer ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 For i = 0 To n banro(i) = bi_str(banro(i)) banma(i) = bi_str(banma(i)) Next End Sub Function bi_so(ByVal a As Integer) As String Dim i As Integer Dim tam(5) As Char For i = 0 To 5 tam(i) = (a Mod 2).ToString a \= 2 Next Array.Reverse(tam) Return tam End Function Function thapphan(ByVal b As String) As Integer Dim i As Integer Dim tam As Integer = 0 For i = 0 To b.Length - 1 If b.Substring(i, 1) = 1 Then tam += 2 ^ (b.Length - 1 - i) End If Next Return tam End Function Function binary(ByVal a As Integer, ByVal n As Integer) As String Dim i As Integer Dim tam(n - 1) As Char ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 For i = 0 To n - 1 tam(i) = (a Mod 2).ToString a = a \ 2 Next Array.Reverse(tam) Return tam End Function Haøm taïo taäp test Function tap_test() As String() Dim i, j, k As Integer Dim ee(7) As String Dim eephay(7) As String Dim ccphay(7) As String Dim test(63) As String For i = 0 To (n - 1) / 2 For j = 0 To 7 ee(j) = e(i).Substring(j * 6, 6) eephay(j) = ephay(i).Substring(j * 6, 6) ccphay(j) = cphay(i).Substring(j * 4, 4) test = tap_in(ee(j), eephay(j), ccphay(j), s(j)) For k = 0 To 63 If test(k) = 1 Then jhop(j, k) += 1 End If Next Next Next End Function ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Haøm taïo khoaù voøng 3 Function khoavong3() As String Dim khoav3 As String Dim i, j As Integer Dim count As Integer = 0 Dim vitrimax As Integer For i = 0 To 7 count = 0 Dim max As Integer = (n + 1) / 2 For j = 0 To 63 If jhop(i, j) = max Then count += 1 vitrimax = j End If Next If count > 1 Then lbthongbao.Text = "Nhậ p thêm bả n mã và bả n rõ, vì chư a xác đị nh đư ợ c phầ n tử max trong jhộ p" btthamma.Enabled = False txtbanro.Focus() n += 2 ReDim banro(n) ReDim banma(n) ReDim e((n - 2) / 2) ReDim esao((n - 2) / 2) ReDim ephay((n - 2) / 2) ReDim cphay((n - 2) / 2) flag = False ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Exit Function End If khoav3 += binary(vitrimax, 6) Next txtkhoav3.Text = khoav3 Return khoav3 End Function Haøm Xöû lyù khoaù Function xulikhoa() As String Dim khoa As String = khoavong3() If flag = False Then Exit Function End If khoa = hoanvi_pc2tru(khoa) Dim haitambitdau As String = khoa.Substring(0, 28) Dim haitambitcuoi As String = khoa.Substring(28, 28) haitambitdau = dichphai(haitambitdau, 4) haitambitcuoi = dichphai(haitambitcuoi, 4) khoa = haitambitdau + haitambitcuoi Dim i As Integer khoa = hoanvi_pc1tru(khoa) txtkhoa.Text = khoa Return khoa 'khoa 56 bit End Function Haøm taïo chuoãi khoaù Sub taochuoikhoa(ByVal c As String) If flag = False Then Exit Sub ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 End If Dim chuoibinary(255) As String Dim i As Integer For i = 0 To 255 chuoibinary(i) = binary(i, 8) chuoikhoa(i) = taotungkhoa(c, chuoibinary(i)) Next End Sub Haøm taïo töøng khoaù Function taotungkhoa(ByVal a As String, ByVal b As String) As String Dim i As Integer Dim j As Integer = 0 Dim tam(63) As Char For i = 0 To 63 tam(i) = a.Substring(i, 1) If tam(i) = "?" Then tam(i) = b.Substring(j, 1) j += 1 End If Next Return tam End Function Haøm dòch phaûi Function dichphai(ByVal s As String, ByVal n As Integer) As String Return s.Substring(s.Length - n, n) + s.Substring(0, s.Length - n) End Function Function tap_in(ByVal e As String, ByVal ephay As String, ByVal cphay As String, ByVal s As DataTable) As String() ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Dim tam(63), b, bsao, c, csao, cphaytam As String Dim i As Integer For i = 0 To 63 b = bi_so(i) Dim haibitcuoi As String = b.Substring(0, 1) + b.Substring(5, 1) Dim bonbitgiua As String = b.Substring(1, 4) Dim srow = thapphan(haibitcuoi) Dim scol = thapphan(bonbitgiua) Dim sij As Integer = s.Rows(srow).Item(scol) c = binary(sij, 4) bsao = phay(ephay, b) haibitcuoi = bsao.Substring(0, 1) + bsao.Substring(5, 1) bonbitgiua = bsao.Substring(1, 4) srow = thapphan(haibitcuoi) scol = thapphan(bonbitgiua) sij = s.Rows(srow).Item(scol) csao = binary(sij, 4) cphaytam = phay(c, csao) If cphaytam = cphay Then tam(thapphan(phay(e, b))) = 1 End If Next Return tam End Function Moät soá Haøm cho xöû lyù söï kieän Private Sub btthamma_Click(ByVal sender As System.Object, ByVal ee As System.EventArgs) Handles btthamma.Click ReDim banro(n) ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 ReDim banma(n) ReDim e((n - 1) / 2) ReDim esao((n - 1) / 2) ReDim ephay((n - 1) / 2) ReDim cphay((n - 1) / 2) flag = True If gandulieu() = False Then Exit Sub End If If kiemtra() = False Then Exit Sub End If bi_banro_banma() xuli_e_esao_ephay() xuli_cphay() tap_test() taochuoikhoa(xulikhoa()) If flag = False Then Exit Sub End If chonkhoadung() End Sub Private Sub btthoat_Click(ByVal sender As System.Object, ByVal ee As System.EventArgs) Handles btthoat.Click Me.Close() End Sub Private Sub thammades_Load(ByVal sender As System.Object, ByVal ee As System.EventArgs) Handles MyBase.Load ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Dim strbanro As String strbanro += "748502CD38451097" + Chr(13) + Chr(10) strbanro += "3874756438451097" + Chr(13) + Chr(10) strbanro += "486911026ACDFF31" + Chr(13) + Chr(10) strbanro += "375BD31F6ACDFF31" + Chr(13) + Chr(10) strbanro += "357418DA013FEC86" + Chr(13) + Chr(10) strbanro += "12549847013FEC86" txtbanro.Text = strbanro Dim strbanma As String strbanma += "03C70306D8A09F10" + Chr(13) + Chr(10) strbanma += "78560A0960E6D4CB" + Chr(13) + Chr(10) strbanma += "45FA285BE5ADC730" + Chr(13) + Chr(10) strbanma += "134F7915AC253457" + Chr(13) + Chr(10) strbanma += "D8A31B2F28BBC5CF" + Chr(13) + Chr(10) strbanma += "0F317AC2B23CB944" txtbanma.Text = strbanma khoitao() End Sub 'des Haøm caét bit cuoái Function catbitcuoi(ByVal k As String) As String 'dua vao 64 bit tra ra 56 bit Dim i As Integer = 0 Dim j As Integer Dim tam As String While i < 63 For j = i To i + 6 tam += k.Substring(j, 1) ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Next i = i + 8 End While Return tam End Function Function ls(ByVal s As String, ByVal n As Integer) As String Return s.Substring(n, s.Length - n) + s.Substring(0, n) End Function Haøm taïo daõy khoaù Sub taodaykhoa(ByVal khoa As String) khoa = hoanvi_pc1(khoa) Dim d(2) As String Dim c(2) As String c(0) = khoa.Substring(0, 28) c(0) = ls(c(0), 1) d(0) = khoa.Substring(28, 28) d(0) = ls(d(0), 1) daykhoa(0) = hoanvi_pc2(c(0) + d(0)) Dim i As Integer For i = 1 To 2 If i = 1 Then c(i) = ls(c(i - 1), 1) d(i) = ls(d(i - 1), 1) Else c(i) = ls(c(i - 1), 2) d(i) = ls(d(i - 1), 2) End If daykhoa(i) = hoanvi_pc2(c(i) + d(i)) ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Next i End Sub Haøm xöû lyù chuoãi nhaäp Function bi_acsii(ByVal int As Integer) As String Dim tam(7) As Char Dim i As Integer For i = 0 To 7 tam(i) = (int Mod 2).ToString int \= 2 Next Array.Reverse(tam) Return tam End Function Haøm maõ hoaù Function mahoa(ByVal x As String) As String Dim i, j As Integer Dim l(2) As String Dim r(2) As String 'x = hoanvi_ip(x) Dim l0 As String = x.Substring(0, 32) Dim r0 As String = x.Substring(32, 32) l(0) = r0 For i = 0 To 31 r(0) += (l0.Substring(i, 1) Xor f(r0, daykhoa(0)).Substring(i, 1)).ToString Next For i = 1 To 2 l(i) = r(i - 1) ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Dim a As String = f(r(i - 1), daykhoa(i)) For j = 0 To 31 r(i) += (l(i - 1).Substring(j, 1) Xor a.Substring(j, 1)).ToString Next j Next i Dim t As String = l(2) + r(2) Return t 'Return hoanvi_iptru(r(2) + l(2)) End Function Haøm taïo haøm f Function f(ByVal r As String, ByVal daykhoa_k As String) As String Dim i As Integer Dim e As String Dim hv As String = hoanvi_e(r) For i = 0 To 47 e += (hv.Substring(i, 1) Xor daykhoa_k.Substring(i, 1)).ToString Next Dim b(7) As String Dim c As String For i = 0 To 7 b(i) = e.Substring(i * 6, 6) Dim haibitdaucuoi As String = b(i).Substring(0, 1) + b(i).Substring(5, 1) Dim bonbitgiua As String = b(i).Substring(1, 4) Dim srow = thapphan(haibitdaucuoi) Dim scol = thapphan(bonbitgiua) Dim sij As Integer = s(i).Rows(srow).Item(scol) c += binary(sij, 4) ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Next Return hoanvi_p(c) End Function Haøm ñoåi ra chöõ 'Function doirachu(ByVal y As String) As String 'Dim tam As String = y 'Dim tam1 As String = "" 'Dim so As Integer 'Dim i As Integer 'Dim j As Integer 'While i < tam.Length - 1 'so = 0 'For j = i To i + 7 'If tam.Substring(j, 1) = 1 Then 'so += 2 ^ (7 - (j - i)) 'End If 'Next 'tam1 += Chr(so) 'i = i + 8 'End While 'Return tam1 'End Function Function doirachu(ByVal y As String) As String Dim tam As String = y Dim tam1 As String = "" Dim so As Integer Dim i, j As Integer While i < tam.Length - 1 ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 so = 0 For j = i To i + 3 If tam.Substring(j, 1) = 1 Then so += 2 ^ (3 - (j - i)) End If Next tam1 += chucai(so) i = i + 4 End While Return tam1 End Function Chöõ caùi Function chucai(ByVal so As Integer) As Char Select Case so Case 0 Return "0" Case 1 Return "1" Case 2 Return "2" Case 3 Return "3" Case 4 Return "4" Case 5 Return "5" Case 6 Return "6" ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 Case 7 Return "7" Case 8 Return "8" Case 9 Return "9" Case 10 Return "A" Case 11 Return "B" Case 12 Return "C" Case 13 Return "D" Case 14 Return "E" Case 15 Return "F" End Select End Function Haøm chuyeån maõ asc Function asc(ByVal a As Char) Select Case a Case "0" asc = 0 Case "1" asc = 1 Case "2" ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 asc = 2 Case "3" asc = 3 Case "4" asc = 4 Case "5" asc = 5 Case "6" asc = 6 Case "7" asc = 7 Case "8" asc = 8 Case "9" asc = 9 Case "A" asc = 10 Case "B" asc = 11 Case "C" asc = 12 Case "D" asc = 13 Case "E" asc = 14 Case "F" asc = 15 End Select ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 End Function Haøm choïn khoaù Sub chonkhoadung() Dim i As Integer Dim x As String = banro(0) 'For i = 0 To banro(0).Length - 1 'x += binary(asc(banro(0).Substring(i, 1)), hebit) 'Next For i = 0 To 255 taodaykhoa(chuoikhoa(i)) Dim banma1 As String = doirachu(mahoa(x)) If banma1 = doirachu(banma(0)) Then chuoikhoa(i) = chuoikhoa(i).Replace("#", "0") txtkhoa.Text = doirachu(chuoikhoa(i)) Exit Sub End If Next MessageBox.Show("khong tim duoc khoa") End Sub Private Sub txtbanro_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtbanro.TextChanged btthamma.Enabled = True lbthongbao.Text = "" End Sub Private Sub txtbanma_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtbanma.TextChanged ÑOÀ AÙN BAÛO MAÄT THOÂNG TIN HEÄ MAÕ DES NGOÂ THÒ TUYEÁT HAØ – T012825 btthamma.Enabled = True lbthongbao.Text = "" End Sub End Class