السلام عليكم ورحمه الله وبركاته
أخوانى الكرام أعضاء ومشرفين المنتدى
اليوم سوف اقوم بشرح طريقه تشفير البيانات النصيه عن طريق مكتبه Md5
وهى من اقوى مكتبات تشفير البيانات والتى لا يمكن فك تشفيرها مره أخرى
وهى تستخدم فى لغات PHP
المكتبه تقوم بتشفير اى نص إلى نص غير مفهوم يتكون من 32 حرف
أى كان عدد الحروف فى النص حرف مثل مئه لا يختلف ولا يمكن فك تشفيره مره أخرى
وهى من الممكن أستخدامها فى تشفير بينات المستخدمين مثلا فى برنامج له صلاحيات لكل مستخدم
حتى لا يستطيع اى أحد قرائه البيانات من القاعده
وها هى المكتبه وأيضا سوف أرفق مثال صغير عليها
ضع هذا الكود فى Class Module وسميه Md5
Option Explicit Private lngTrack As Long Private arrLongConversion(4) As Long Private arrSplit64(63) As Byte Private Const OFFSET_4 = 4294967296# Private Const MAXINT_4 = 2147483647 Private Const S11 = 7 Private Const S12 = 12 Private Const S13 = 17 Private Const S14 = 22 Private Const S21 = 5 Private Const S22 = 9 Private Const S23 = 14 Private Const S24 = 20 Private Const S31 = 4 Private Const S32 = 11 Private Const S33 = 16 Private Const S34 = 23 Private Const S41 = 6 Private Const S42 = 10 Private Const S43 = 15 Private Const S44 = 21 Private Function MD5Round(strRound As String, a As Long, b As Long, C As Long, d As Long, x As Long, S As Long, ac As Long) As Long Select Case strRound Case Is = "FF" a = MD5LongAdd4(a, (b And C) Or (Not (b) And d), x, ac) a = MD5Rotate(a, S) a = MD5LongAdd(a, b) Case Is = "GG" a = MD5LongAdd4(a, (b And d) Or (C And Not (d)), x, ac) a = MD5Rotate(a, S) a = MD5LongAdd(a, b) Case Is = "HH" a = MD5LongAdd4(a, b Xor C Xor d, x, ac) a = MD5Rotate(a, S) a = MD5LongAdd(a, b) Case Is = "II" a = MD5LongAdd4(a, C Xor (b Or Not (d)), x, ac) a = MD5Rotate(a, S) a = MD5LongAdd(a, b) End Select End Function Private Function MD5Rotate(lngValue As Long, lngBits As Long) As Long Dim lngSign As Long Dim lngI As Long lngBits = (lngBits Mod 32) If lngBits = 0 Then MD5Rotate = lngValue: Exit Function For lngI = 1 To lngBits lngSign = lngValue And &HC0000000 lngValue = (lngValue And &H3FFFFFFF) * 2 lngValue = lngValue Or ((lngSign < 0) And 1) Or (CBool(lngSign And &H40000000) And &H80000000) Next MD5Rotate = lngValue End Function Private Function TRID() As String Dim sngNum As Single, lngnum As Long Dim strResult As String sngNum = Rnd(2147483648#) strResult = CStr(sngNum) strResult = Replace(strResult, "0.", "") strResult = Replace(strResult, ".", "") strResult = Replace(strResult, "E-", "") TRID = strResult End Function Private Function MD564Split(lngLength As Long, bytBuffer() As Byte) As String Dim lngBytesTotal As Long, lngBytesToAdd As Long Dim intLoop As Integer, intLoop2 As Integer, lngTrace As Long Dim intInnerLoop As Integer, intLoop3 As Integer lngBytesTotal = lngTrack Mod 64 lngBytesToAdd = 64 - lngBytesTotal lngTrack = (lngTrack + lngLength) If lngLength >= lngBytesToAdd Then For intLoop = 0 To lngBytesToAdd - 1 arrSplit64(lngBytesTotal + intLoop) = bytBuffer(intLoop) Next intLoop MD5Conversion arrSplit64 lngTrace = (lngLength) Mod 64 For intLoop2 = lngBytesToAdd To lngLength - intLoop - lngTrace Step 64 For intInnerLoop = 0 To 63 arrSplit64(intInnerLoop) = bytBuffer(intLoop2 + intInnerLoop) Next intInnerLoop MD5Conversion arrSplit64 Next intLoop2 lngBytesTotal = 0 Else intLoop2 = 0 End If For intLoop3 = 0 To lngLength - intLoop2 - 1 arrSplit64(lngBytesTotal + intLoop3) = bytBuffer(intLoop2 + intLoop3) Next intLoop3 End Function Private Function MD5StringArray(strInput As String) As Byte() Dim intLoop As Integer Dim bytBuffer() As Byte ReDim bytBuffer(Len(strInput)) For intLoop = 0 To Len(strInput) - 1 bytBuffer(intLoop) = Asc(Mid(strInput, intLoop + 1, 1)) Next intLoop MD5StringArray = bytBuffer End Function Private Sub MD5Conversion(bytBuffer() As Byte) Dim x(16) As Long, a As Long Dim b As Long, C As Long Dim d As Long a = arrLongConversion(1) b = arrLongConversion(2) C = arrLongConversion(3) d = arrLongConversion(4) MD5Decode 64, x, bytBuffer MD5Round "FF", a, b, C, d, x(0), S11, -680876936 MD5Round "FF", d, a, b, C, x(1), S12, -389564586 MD5Round "FF", C, d, a, b, x(2), S13, 606105819 MD5Round "FF", b, C, d, a, x(3), S14, -1044525330 MD5Round "FF", a, b, C, d, x(4), S11, -176418897 MD5Round "FF", d, a, b, C, x(5), S12, 1200080426 MD5Round "FF", C, d, a, b, x(6), S13, -1473231341 MD5Round "FF", b, C, d, a, x(7), S14, -45705983 MD5Round "FF", a, b, C, d, x(8), S11, 1770035416 MD5Round "FF", d, a, b, C, x(9), S12, -1958414417 MD5Round "FF", C, d, a, b, x(10), S13, -42063 MD5Round "FF", b, C, d, a, x(11), S14, -1990404162 MD5Round "FF", a, b, C, d, x(12), S11, 1804603682 MD5Round "FF", d, a, b, C, x(13), S12, -40341101 MD5Round "FF", C, d, a, b, x(14), S13, -1502002290 MD5Round "FF", b, C, d, a, x(15), S14, 1236535329 MD5Round "GG", a, b, C, d, x(1), S21, -165796510 MD5Round "GG", d, a, b, C, x(6), S22, -1069501632 MD5Round "GG", C, d, a, b, x(11), S23, 643717713 MD5Round "GG", b, C, d, a, x(0), S24, -373897302 MD5Round "GG", a, b, C, d, x(5), S21, -701558691 MD5Round "GG", d, a, b, C, x(10), S22, 38016083 MD5Round "GG", C, d, a, b, x(15), S23, -660478335 MD5Round "GG", b, C, d, a, x(4), S24, -405537848 MD5Round "GG", a, b, C, d, x(9), S21, 568446438 MD5Round "GG", d, a, b, C, x(14), S22, -1019803690 MD5Round "GG", C, d, a, b, x(3), S23, -187363961 MD5Round "GG", b, C, d, a, x(8), S24, 1163531501 MD5Round "GG", a, b, C, d, x(13), S21, -1444681467 MD5Round "GG", d, a, b, C, x(2), S22, -51403784 MD5Round "GG", C, d, a, b, x(7), S23, 1735328473 MD5Round "GG", b, C, d, a, x(12), S24, -1926607734 MD5Round "HH", a, b, C, d, x(5), S31, -378558 MD5Round "HH", d, a, b, C, x(8), S32, -2022574463 MD5Round "HH", C, d, a, b, x(11), S33, 1839030562 MD5Round "HH", b, C, d, a, x(14), S34, -35309556 MD5Round "HH", a, b, C, d, x(1), S31, -1530992060 MD5Round "HH", d, a, b, C, x(4), S32, 1272893353 MD5Round "HH", C, d, a, b, x(7), S33, -155497632 MD5Round "HH", b, C, d, a, x(10), S34, -1094730640 MD5Round "HH", a, b, C, d, x(13), S31, 681279174 MD5Round "HH", d, a, b, C, x(0), S32, -358537222 MD5Round "HH", C, d, a, b, x(3), S33, -722521979 MD5Round "HH", b, C, d, a, x(6), S34, 76029189 MD5Round "HH", a, b, C, d, x(9), S31, -640364487 MD5Round "HH", d, a, b, C, x(12), S32, -421815835 MD5Round "HH", C, d, a, b, x(15), S33, 530742520 MD5Round "HH", b, C, d, a, x(2), S34, -995338651 MD5Round "II", a, b, C, d, x(0), S41, -198630844 MD5Round "II", d, a, b, C, x(7), S42, 1126891415 MD5Round "II", C, d, a, b, x(14), S43, -1416354905 MD5Round "II", b, C, d, a, x(5), S44, -57434055 MD5Round "II", a, b, C, d, x(12), S41, 1700485571 MD5Round "II", d, a, b, C, x(3), S42, -1894986606 MD5Round "II", C, d, a, b, x(10), S43, -1051523 MD5Round "II", b, C, d, a, x(1), S44, -2054922799 MD5Round "II", a, b, C, d, x(8), S41, 1873313359 MD5Round "II", d, a, b, C, x(15), S42, -30611744 MD5Round "II", C, d, a, b, x(6), S43, -1560198380 MD5Round "II", b, C, d, a, x(13), S44, 1309151649 MD5Round "II", a, b, C, d, x(4), S41, -145523070 MD5Round "II", d, a, b, C, x(11), S42, -1120210379 MD5Round "II", C, d, a, b, x(2), S43, 718787259 MD5Round "II", b, C, d, a, x(9), S44, -343485551 arrLongConversion(1) = MD5LongAdd(arrLongConversion(1), a) arrLongConversion(2) = MD5LongAdd(arrLongConversion(2), b) arrLongConversion(3) = MD5LongAdd(arrLongConversion(3), C) arrLongConversion(4) = MD5LongAdd(arrLongConversion(4), d) End Sub Private Function MD5LongAdd(lngVal1 As Long, lngVal2 As Long) As Long Dim lngHighWord As Long Dim lngLowWord As Long Dim lngOverflow As Long lngLowWord = (lngVal1 And &HFFFF&) + (lngVal2 And &HFFFF&) lngOverflow = lngLowWord \ 65536 lngHighWord = (((lngVal1 And &HFFFF0000) \ 65536) + ((lngVal2 And &HFFFF0000) \ 65536) + lngOverflow) And &HFFFF& MD5LongAdd = MD5LongConversion((lngHighWord * 65536#) + (lngLowWord And &HFFFF&)) End Function Private Function MD5LongAdd4(lngVal1 As Long, lngVal2 As Long, lngVal3 As Long, lngVal4 As Long) As Long Dim lngHighWord As Long Dim lngLowWord As Long Dim lngOverflow As Long lngLowWord = (lngVal1 And &HFFFF&) + (lngVal2 And &HFFFF&) + (lngVal3 And &HFFFF&) + (lngVal4 And &HFFFF&) lngOverflow = lngLowWord \ 65536 lngHighWord = (((lngVal1 And &HFFFF0000) \ 65536) + ((lngVal2 And &HFFFF0000) \ 65536) + ((lngVal3 And &HFFFF0000) \ 65536) + ((lngVal4 And &HFFFF0000) \ 65536) + lngOverflow) And &HFFFF& MD5LongAdd4 = MD5LongConversion((lngHighWord * 65536#) + (lngLowWord And &HFFFF&)) End Function Private Sub MD5Decode(intLength As Integer, lngOutBuffer() As Long, bytInBuffer() As Byte) Dim intDblIndex As Integer Dim intByteIndex As Integer Dim dblSum As Double intDblIndex = 0 For intByteIndex = 0 To intLength - 1 Step 4 dblSum = bytInBuffer(intByteIndex) + bytInBuffer(intByteIndex + 1) * 256# + bytInBuffer(intByteIndex + 2) * 65536# + bytInBuffer(intByteIndex + 3) * 16777216# lngOutBuffer(intDblIndex) = MD5LongConversion(dblSum) intDblIndex = (intDblIndex + 1) Next intByteIndex End Sub Private Function MD5LongConversion(dblValue As Double) As Long If dblValue < 0 Or dblValue >= OFFSET_4 Then Error 6 If dblValue <= MAXINT_4 Then MD5LongConversion = dblValue Else MD5LongConversion = dblValue - OFFSET_4 End If End Function Private Sub MD5Finish() Dim dblBits As Double Dim arrPadding(72) As Byte Dim lngBytesBuffered As Long arrPadding(0) = &H80 dblBits = lngTrack * 8 lngBytesBuffered = lngTrack Mod 64 If lngBytesBuffered <= 56 Then MD564Split (56 - lngBytesBuffered), arrPadding Else MD564Split (120 - lngTrack), arrPadding End If arrPadding(0) = MD5LongConversion(dblBits) And &HFF& arrPadding(1) = MD5LongConversion(dblBits) \ 256 And &HFF& arrPadding(2) = MD5LongConversion(dblBits) \ 65536 And &HFF& arrPadding(3) = MD5LongConversion(dblBits) \ 16777216 And &HFF& arrPadding(4) = 0 arrPadding(5) = 0 arrPadding(6) = 0 arrPadding(7) = 0 MD564Split 8, arrPadding End Sub Private Function MD5StringChange(lngnum As Long) As String Dim bytA As Byte Dim bytB As Byte Dim bytC As Byte Dim bytD As Byte bytA = lngnum And &HFF& If bytA < 16 Then MD5StringChange = "0" & Hex(bytA) Else MD5StringChange = Hex(bytA) End If bytB = (lngnum And &HFF00&) \ 256 If bytB < 16 Then MD5StringChange = MD5StringChange & "0" & Hex(bytB) Else MD5StringChange = MD5StringChange & Hex(bytB) End If bytC = (lngnum And &HFF0000) \ 65536 If bytC < 16 Then MD5StringChange = MD5StringChange & "0" & Hex(bytC) Else MD5StringChange = MD5StringChange & Hex(bytC) End If If lngnum < 0 Then bytD = ((lngnum And &H7F000000) \ 16777216) Or &H80& Else bytD = (lngnum And &HFF000000) \ 16777216 End If If bytD < 16 Then MD5StringChange = MD5StringChange & "0" & Hex(bytD) Else MD5StringChange = MD5StringChange & Hex(bytD) End If End Function Private Function MD5Value() As String MD5Value = LCase(MD5StringChange(arrLongConversion(1)) & MD5StringChange(arrLongConversion(2)) & MD5StringChange(arrLongConversion(3)) & MD5StringChange(arrLongConversion(4))) End Function Public Function CalculateMD5(strMessage As String) As String Dim bytBuffer() As Byte bytBuffer = MD5StringArray(strMessage) MD5Start MD564Split Len(strMessage), bytBuffer MD5Finish CalculateMD5 = MD5Value End Function Private Sub MD5Start() lngTrack = 0 arrLongConversion(1) = MD5LongConversion(1732584193#) arrLongConversion(2) = MD5LongConversion(4023233417#) arrLongConversion(3) = MD5LongConversion(2562383102#) arrLongConversion(4) = MD5LongConversion(271733878#) End Sub
ثم قم بأضافه فورم جديد وأضيف عليه زر و 2 تيكست
أكتب الكود التالى التالى فى الزر
Dim x As New Md5 Text2.Text = x.CalculateMD5(Text1.Text)
وفى المرفقات مثال على المكتبه
