-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathMD5.bas
400 lines (290 loc) · 12.3 KB
/
MD5.bas
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
Attribute VB_Name = "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