base64加密vb
大家好，我是阿薩。昨天和開發同學一起開會的時候。開發同學說到了用Base64編碼，我立即說 不能使用Base64加密。然後開發來了一句Base64不是加密演算法。當時懵了。默默記下這個知識點，回來學習下。
先給大家講解下我為什麼會有不能使用Base64加密的意識。很多年前，我遇到的第一個安全問題，就是敏感數據用Base64加密了。 事情起因是，我們接到一個bug，說有個敏感欄位使用Base64在前端加密了，然後傳給後端了。
基於之前的小故事，對於使用了Base64編碼的地方就覺得不安全。這也是為什麼會對開發說不能用Base64加密了，
今天我們就來學習下Base64編碼。
一，Base64編碼的由來。
傳說，最開始互聯網電子郵件都是英文的，後來互聯網傳到中國後，互聯網電子郵件漢字就不認識了。所以就有了Base64編碼，把中文變成可識別的英文。然後Base64編碼被廣泛用到各行各業。
以上只是傳說。真實的由來，就不得而知了。
下面我們從計算機的底層傳輸過程中。它分為可見字元和不可見字元。可見字元比如我們熟知的ASCII碼。
還有一些不可見的控制字元（0~31以及127），比如回車，換行等以及一些二進制數據都是不可見字元。
這些不可見字元在一些硬體，比如交換機，路由器以及網關等識別或者解析錯誤，導致錯誤發生，所以就有了Base64編碼的市場。因此Base64產生了。
二，Base64 編碼的原理
Base64編碼就是要把不可見的字元轉換成常見的64個字元的過程。
這64個字元是哪些呢？
那麼它工作原理是啥呢？
1） 首先把整段傳輸內容全部劃分成三個位元組一組。這里就有了24bit了.
2） 然後把24bit 分成四組。每一組就有6bit
3）在6bit的最前面添加2個0，這樣就有了8bit
4）把這8bit 轉換成一個位元組。查找上表中對應字元。所有其他分組內容按照這樣的處理邏輯處理下。就得到了Base64的編碼後字元。
注意，如果不夠三位元組，用0填到三位元組，同時補充了多少個位元組的0，末尾就添加就幾個=。
分別圖示下以上過程：
三個A
2個A，補充一個0
1個A，補充2個0
三，總結
Base64編碼不是用來加密的，也不是加密演算法。它只是用來編碼的。切記不可用於加密。如果敏感信息用Base64編碼加密了，趕緊提bug。
經過今天的學習，希望大家有所收獲。
如果你喜歡今天的內容，歡迎點贊，關注。
㈡ 如何用base64演算法在VB上實現對text1加密
建立兩個text文本框，第一個text1作為加密內容，第二個text2作為加密後的內容則text2.text=base64encode（text1.text）
㈢ VB加密解密，急！！
<%
'----加密/解密 函數------
%>
<%
dim sBASE_64_CHARACTERS,varchar,varasc
dim len1
dim i
dim m3
sBASE_64_CHARACTERS = "+/"
sBASE_64_CHARACTERS = strUnicode2Ansi(sBASE_64_CHARACTERS)
Function strUnicodeLen(asContents)
'計算unicode字元串的Ansi編碼的長度
asContents1="a"&asContents
len1=len(asContents1)
k=0
for i=1 to len1
asc1=asc(mid(asContents1,i,1))
if asc1<0 then asc1=65536+asc1
if asc1>255 then
k=k+2
else
k=k+1
end if
next
strUnicodeLen=k-1
End Function
Function strUnicode2Ansi(asContents)
'將Unicode編碼的字元串，轉換成Ansi編碼的字元串
strUnicode2Ansi=""
len1=len(asContents)
for i=1 to len1
varchar=mid(asContents,i,1)
varasc=asc(varchar)
if varasc<0 then varasc=varasc+65536
if varasc>255 then
varHex=Hex(varasc)
varlow=left(varHex,2)
varhigh=right(varHex,2)
strUnicode2Ansi=strUnicode2Ansi & chrb("&H" & varlow ) & chrb("&H" & varhigh )
else
strUnicode2Ansi=strUnicode2Ansi & chrb(varasc)
end if
next
End function
Function strAnsi2Unicode(asContents)
'將Ansi編碼的字元串，轉換成Unicode編碼的字元串
strAnsi2Unicode = ""
len1=lenb(asContents)
if len1=0 then exit function
for i=1 to len1
varchar=midb(asContents,i,1)
varasc=ascb(varchar)
if varasc > 127 then
strAnsi2Unicode = strAnsi2Unicode & chr(ascw(midb(asContents,i+1,1) & varchar))
i=i+1
else
strAnsi2Unicode = strAnsi2Unicode & chr(varasc)
end if
next
End function
Function Base64encode(asContents)
'將Ansi編碼的字元串進行Base64編碼
'asContents應當是ANSI編碼的字元串（二進制的字元串也可以）
Dim lnPosition
Dim lsResult
Dim Char1
Dim Char2
Dim Char3
Dim Char4
Dim Byte1
Dim Byte2
Dim Byte3
Dim SaveBits1
Dim SaveBits2
Dim lsGroupBinary
Dim lsGroup64
Dim m4,len1,len2
len1=Lenb(asContents)
if len1<1 then
Base64encode=""
exit Function
end if
m3=Len1 Mod 3
If M3 > 0 Then asContents = asContents & String(3-M3, chrb(0))
IF m3 > 0 THEN
len1=len1+(3-m3)
len2=len1-3
else
len2=len1
end if
lsResult = ""
For lnPosition = 1 To len2 Step 3
lsGroup64 = ""
lsGroupBinary = Midb(asContents, lnPosition, 3)
Byte1 = Ascb(Midb(lsGroupBinary, 1, 1)): SaveBits1 = Byte1 And 3
Byte2 = Ascb(Midb(lsGroupBinary, 2, 1)): SaveBits2 = Byte2 And 15
Byte3 = Ascb(Midb(lsGroupBinary, 3, 1))
Char1 = Midb(sBASE_64_CHARACTERS, ((Byte1 And 252) \ 4) + 1, 1)
Char2 = Midb(sBASE_64_CHARACTERS, (((Byte2 And 240) \ 16) Or (SaveBits1 * 16) And &HFF) + 1, 1)
Char3 = Midb(sBASE_64_CHARACTERS, (((Byte3 And 192) \ 64) Or (SaveBits2 * 4) And &HFF) + 1, 1)
Char4 = Midb(sBASE_64_CHARACTERS, (Byte3 And 63) + 1, 1)
lsGroup64 = Char1 & Char2 & Char3 & Char4
lsResult = lsResult & lsGroup64
Next
if M3 > 0 then
lsGroup64 = ""
lsGroupBinary = Midb(asContents, len2+1, 3)
Byte1 = Ascb(Midb(lsGroupBinary, 1, 1)): SaveBits1 = Byte1 And 3
Byte2 = Ascb(Midb(lsGroupBinary, 2, 1)): SaveBits2 = Byte2 And 15
Byte3 = Ascb(Midb(lsGroupBinary, 3, 1))
Char1 = Midb(sBASE_64_CHARACTERS, ((Byte1 And 252) \ 4) + 1, 1)
Char2 = Midb(sBASE_64_CHARACTERS, (((Byte2 And 240) \ 16) Or (SaveBits1 * 16) And &HFF) + 1, 1)
Char3 = Midb(sBASE_64_CHARACTERS, (((Byte3 And 192) \ 64) Or (SaveBits2 * 4) And &HFF) + 1, 1)
if M3=1 then
lsGroup64 = Char1 & Char2 & ChrB(61) & ChrB(61)
else
lsGroup64 = Char1 & Char2 & Char3 & ChrB(61)
end if
lsResult = lsResult & lsGroup64
end if
Base64encode = lsResult
End Function
Function Base64decode(asContents)
'將Base64編碼字元串轉換成Ansi編碼的字元串
'asContents應當也是ANSI編碼的字元串（二進制的字元串也可以）
Dim lsResult
Dim lnPosition
Dim lsGroup64, lsGroupBinary
Dim Char1, Char2, Char3, Char4
Dim Byte1, Byte2, Byte3
Dim M4,len1,len2
len1= Lenb(asContents)
M4 = len1 Mod 4
if len1 < 1 or M4 > 0 then
Base64decode = ""
exit Function
end if
if midb(asContents, len1, 1) = chrb(61) then m4=3
if midb(asContents, len1-1, 1) = chrb(61) then m4=2
if m4 = 0 then
len2=len1
else
len2=len1-4
end if
For lnPosition = 1 To Len2 Step 4
lsGroupBinary = ""
lsGroup64 = Midb(asContents, lnPosition, 4)
Char1 = InStrb(sBASE_64_CHARACTERS, Midb(lsGroup64, 1, 1)) - 1
Char2 = InStrb(sBASE_64_CHARACTERS, Midb(lsGroup64, 2, 1)) - 1
Char3 = InStrb(sBASE_64_CHARACTERS, Midb(lsGroup64, 3, 1)) - 1
Char4 = InStrb(sBASE_64_CHARACTERS, Midb(lsGroup64, 4, 1)) - 1
Byte1 = Chrb(((Char2 And 48) \ 16) Or (Char1 * 4) And &HFF)
Byte2 = lsGroupBinary & Chrb(((Char3 And 60) \ 4) Or (Char2 * 16) And &HFF)
Byte3 = Chrb((((Char3 And 3) * 64) And &HFF) Or (Char4 And 63))
lsGroupBinary = Byte1 & Byte2 & Byte3
lsResult = lsResult & lsGroupBinary
Next
'處理最後剩餘的幾個字元
if M4 > 0 then
lsGroupBinary = ""
lsGroup64 = Midb(asContents, len2+1, m4) & chrB(65) 'chr(65)=A，轉換成值為0
if M4=2 then '補足4位，是為了便於計算
lsGroup64 = lsGroup64 & chrB(65)
end if
Char1 = InStrb(sBASE_64_CHARACTERS, Midb(lsGroup64, 1, 1)) - 1
Char2 = InStrb(sBASE_64_CHARACTERS, Midb(lsGroup64, 2, 1)) - 1
Char3 = InStrb(sBASE_64_CHARACTERS, Midb(lsGroup64, 3, 1)) - 1
Char4 = InStrb(sBASE_64_CHARACTERS, Midb(lsGroup64, 4, 1)) - 1
Byte1 = Chrb(((Char2 And 48) \ 16) Or (Char1 * 4) And &HFF)
Byte2 = lsGroupBinary & Chrb(((Char3 And 60) \ 4) Or (Char2 * 16) And &HFF)
Byte3 = Chrb((((Char3 And 3) * 64) And &HFF) Or (Char4 And 63))
if M4=2 then
lsGroupBinary = Byte1
elseif M4=3 then
lsGroupBinary = Byte1 & Byte2
end if
lsResult = lsResult & lsGroupBinary
end if
Base64decode = lsResult
End Function
'------------------------------------------------------------------
Function Base64EncodeStr(tpStr)
Base64EncodeStr=strAnsi2Unicode(Base64encode(strUnicode2Ansi(tpStr)))
End Function
Function Base64DecodeStr(tpStr)
Base64DecodeStr=strAnsi2Unicode(Base64decode(strUnicode2Ansi(tpStr)))
End Function
%>
<%
'可用於加密一串地址,多個字元串
A_Key=split("96,44,63,80",",") '定義密鑰
'*********加密的過程*********
Function EnCrypt(m)
Dim strChar,iKeyChar,iStringChar,I
k=0
for I = 1 to Len(m)
iKeyChar =Cint(A_Key(k))
iStringChar = Asc(mid(m,I,1)) '獲取字元的ASCII碼值
iCryptChar = iKeyChar Xor iStringChar '進行異或運算
'對密鑰進行移位運算
If k<3 Then
k=k+1
Else
k=0
End If
c = c & Chr(iCryptChar)
next
EnCrypt = c
End Function
'*********解密的過程*********
Function DeCrypt(c)
Dim strChar, iKeyChar, iStringChar, I
k=0
for I = 1 to Len(c)
iKeyChar =Cint(A_Key(k))
iStringChar = Asc(mid(c,I,1))
iDeCryptChar = iKeyChar Xor iStringChar '進行異或運算
'對密鑰進行移位運算
If k<3 Then
k=k+1
Else
k=0
End If
strDecrypted = strDecrypted & Chr(iDeCryptChar)
next
DeCrypt = strDecrypted
End Function
'中文 可以！但要將所有 Asc() 函數換成 AscW() 函數, Chr() 函數換成 ChrW() 函數！
%>
<%
'-----------------------------------------------------------------
'簡單加密解密
'加密：
'適用於任何字元，包括空格和url沖突的"&""?""%"漢字等符號
'簡單加密，可以改造成移位加密，比如每個字元asc碼值增加或減少一個數字
'可以改造成移位隨機加密。
'比如每個字元前有一個隨機數字，表示該字元asc碼值增加或減少這個隨機數字
'-----------------------------------------------------------------
Function Smp_Encode(x) '加密
for i=1 to len(x)
TempNum=hex(asc(mid(x,i,1)))
if len(TempNum)=4 then
Smp_Encode=Smp_Encode & cstr(TempNum)
else
Smp_Encode=Smp_Encode & "00" & cstr(TempNum)
end if
next
End Function
Function Smp_Decode(x) '解密
for i=1 to len(x) step 4
Smp_Decode=Smp_Decode & chr(int("&H" & mid(x,i,4)))
next
End Function
%>
<%
Function S_Encode(str) '加密字元串
'str = EnCrypt(str)
'str = Base64EncodeStr(str)
str = Smp_Encode(str)
S_Encode = str
End Function
Function S_Decode(str) '解密字元串
'str = DeCrypt(str)
'str = Base64DecodeStr(str)
str = Smp_Decode(str)
S_Decode = str
End Function
%>
<%
Dim theFStr,theEStr,theLStr,IfReal
theFStr = "#$%&'()*+,.-_/:;<=>?@[\\]^`{|}~%中文" '原始字元串
theEStr = Str_Encode(theFStr) '加密字元串
theLStr = Str_Decode(theEStr) '還原字元串
If theFStr=theLStr Then
IfReal = True
Else
IfReal = False
End If
Response.Write "加密前為:"& theFStr &"<BR>"&VbCrlf
Response.Write "加密前字元長度:"& Len(theFStr) &"<BR><BR>"
Response.Write "加密後為:"& theEStr &"<BR>"&VbCrlf
Response.Write "加密後的字元長度:"& Len(theEStr) &"<BR><BR>"
Response.Write "解密(還原)後為:" & theLStr &"<BR>"&VbCrlf
Response.Write "前後字元是否相等:" & IfReal &"<BR>"&VbCrlf
%>
㈣ vb qq密碼加密問題
全部代碼如下：
一個form，3個text，一個command
Private m_lOnBits(30)
Private m_l2Power(30)
Private Const BITS_TO_A_BYTE = 8
Private Const BYTES_TO_A_WORD = 4
Private Const BITS_TO_A_WORD = 32
Function Hex2Bin(HexStr1 As String)
Select Case UCase(HexStr1)
Case "0"
q1 = "0000"
Case "1"
q1 = "0001"
Case "2"
q1 = "0010"
Case "3"
q1 = "0011"
Case "4"
q1 = "0100"
Case "5"
q1 = "0101"
Case "6"
q1 = "0110"
Case "7"
q1 = "0111"
Case "8"
q1 = "1000"
Case "9"
q1 = "1001"
Case "A"
q1 = "1010"
Case "B"
q1 = "1011"
Case "C"
q1 = "1100"
Case "D"
q1 = "1101"
Case "E"
q1 = "1110"
Case "F"
q1 = "1111"
End Select
Hex2Bin = q1
End Function
Function Hex2Bin1(HexStr2 As String)
q1 = Hex2Bin(Mid(HexStr2, 1, 1))
q2 = Hex2Bin(Mid(HexStr2, 2, 1))
q3 = Hex2Bin(Mid(HexStr2, 3, 1))
q4 = Hex2Bin(Mid(HexStr2, 4, 1))
q5 = Hex2Bin(Mid(HexStr2, 5, 1))
q6 = Hex2Bin(Mid(HexStr2, 6, 1))
q7 = Hex2Bin(Mid(HexStr2, 7, 1))
q8 = Hex2Bin(Mid(HexStr2, 8, 1))
q9 = Hex2Bin(Mid(HexStr2, 9, 1))
q10 = Hex2Bin(Mid(HexStr2, 10, 1))
q11 = Hex2Bin(Mid(HexStr2, 11, 1))
q12 = Hex2Bin(Mid(HexStr2, 12, 1))
Hex2Bin1 = q1 & q2 & q3 & q4 & q5 & q6 & q7 & q8 & q9 & q10 & q11 & q12
End Function
Function Bin324(BinCode1 As String)
q1 = Mid(BinCode1, 1, 6)
q2 = Mid(BinCode1, 7, 6)
q3 = Mid(BinCode1, 13, 6)
q4 = Mid(BinCode1, 19, 6)
q5 = Mid(BinCode1, 25, 6)
q6 = Mid(BinCode1, 31, 6)
q7 = Mid(BinCode1, 37, 6)
q8 = Mid(BinCode1, 43, 6)
Bin324 = "00" & q1 & "00" & q2 & "00" & q3 & "00" & q4 & "00" & q5 & "00" & q6 & "00" & q7 & "00" & q8
End Function
Function Bin2Hex(BinCode2 As String)
Select Case UCase(BinCode2)
Case "0000"
q1 = "0"
Case "0001"
q1 = "1"
Case "0010"
q1 = "2"
Case "0011"
q1 = "3"
Case "0100"
q1 = "4"
Case "0101"
q1 = "5"
Case "0110"
q1 = "6"
Case "0111"
q1 = "7"
Case "1000"
q1 = "8"
Case "1001"
q1 = "9"
Case "1010"
q1 = "A"
Case "1011"
q1 = "B"
Case "1100"
q1 = "C"
Case "1101"
q1 = "D"
Case "1110"
q1 = "E"
Case "1111"
q1 = "F"
End Select
Bin2Hex = q1
End Function
Function Bin2Hex2(BinCode As String)
q1 = Bin2Hex(Mid(BinCode, 1, 4))
q2 = Bin2Hex(Mid(BinCode, 5, 4))
q3 = Bin2Hex(Mid(BinCode, 9, 4))
q4 = Bin2Hex(Mid(BinCode, 13, 4))
Bin2Hex2 = q1 & q2 & q3 & q4
End Function
Function Bin2Hex3(BinCode3 As String)
q1 = Bin2Hex2(Mid(BinCode3, 1, 16))
q2 = Bin2Hex2(Mid(BinCode3, 17, 16))
q3 = Bin2Hex2(Mid(BinCode3, 33, 16))
q4 = Bin2Hex2(Mid(BinCode3, 49, 16))
Bin2Hex3 = q1 & q2 & q3 & q4
End Function
Function HexBase64(HexString As String)
HexBase64 = HexBase64_2(Bin2Hex3(Bin324(Hex2Bin1(HexString))))
End Function
Function HexBase64_1(HexString As String)
Select Case HexString
Case "00"
q1 = "A"
Case "01"
q1 = "B"
Case "02"
q1 = "C"
Case "03"
q1 = "D"
Case "04"
q1 = "E"
Case "05"
q1 = "F"
Case "06"
q1 = "G"
Case "07"
q1 = "H"
Case "08"
q1 = "I"
Case "09"
q1 = "J"
Case "0A"
q1 = "K"
Case "0B"
q1 = "L"
Case "0C"
q1 = "M"
Case "0D"
q1 = "N"
Case "0E"
q1 = "O"
Case "0F"
q1 = "P"
Case "10"
q1 = "Q"
Case "11"
q1 = "R"
Case "12"
q1 = "S"
Case "13"
q1 = "T"
Case "14"
q1 = "U"
Case "15"
q1 = "V"
Case "16"
q1 = "W"
Case "17"
q1 = "X"
Case "18"
q1 = "Y"
Case "19"
q1 = "Z"
Case "1A"
q1 = "a"
Case "1B"
q1 = "b"
Case "1C"
q1 = "c"
Case "1D"
q1 = "d"
Case "1E"
q1 = "e"
Case "1F"
q1 = "f"
Case "20"
q1 = "g"
Case "21"
q1 = "h"
Case "22"
q1 = "i"
Case "23"
q1 = "j"
Case "24"
q1 = "k"
Case "25"
q1 = "l"
Case "26"
q1 = "m"
Case "27"
q1 = "n"
Case "28"
q1 = "o"
Case "29"
q1 = "p"
Case "2A"
q1 = "q"
Case "2B"
q1 = "r"
Case "2C"
q1 = "s"
Case "2D"
q1 = "t"
Case "2E"
q1 = "u"
Case "2F"
q1 = "v"
Case "30"
q1 = "w"
Case "31"
q1 = "x"
Case "32"
q1 = "y"
Case "33"
q1 = "z"
Case "34"
q1 = "0"
Case "35"
q1 = "1"
Case "36"
q1 = "2"
Case "37"
q1 = "3"
Case "38"
q1 = "4"
Case "39"
q1 = "5"
Case "3A"
q1 = "6"
Case "3B"
q1 = "7"
Case "3C"
q1 = "8"
Case "3D"
q1 = "9"
Case "3E"
q1 = "+"
Case "3F"
q1 = "/"
End Select
HexBase64_1 = q1
End Function
Function HexBase64_2(HexString As String)
q1 = HexBase64_1(Mid(HexString, 1, 2))
q2 = HexBase64_1(Mid(HexString, 3, 2))
q3 = HexBase64_1(Mid(HexString, 5, 2))
q4 = HexBase64_1(Mid(HexString, 7, 2))
q5 = HexBase64_1(Mid(HexString, 9, 2))
q6 = HexBase64_1(Mid(HexString, 11, 2))
q7 = HexBase64_1(Mid(HexString, 13, 2))
q8 = HexBase64_1(Mid(HexString, 15, 2))
HexBase64_2 = q1 & q2 & q3 & q4 & q5 & q6 & q7 & q8
End Function
Function Hex2Base64(HexCode As String)
For i = 0 To Len(HexCode) Step 12
q1 = q1 & HexBase64(Mid(HexCode, i + 1, 12))
Next
Hex2Base64 = q1
End Function
Private Function md5_F(X, Y, z)
md5_F = (X And Y) Or ((Not X) And z)
End Function
Private Function md5_G(X, Y, z)
md5_G = (X And z) Or (Y And (Not z))
End Function
Private Function md5_H(X, Y, z)
md5_H = (X Xor Y Xor z)
End Function
Private Function md5_I(X, Y, z)
md5_I = (Y Xor (X Or (Not z)))
End Function
Private Sub md5_FF(a, b, c, d, X, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_F(b, c, d), X), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Sub md5_GG(a, b, c, d, X, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_G(b, c, d), X), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Sub md5_HH(a, b, c, d, X, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_H(b, c, d), X), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Sub md5_II(a, b, c, d, X, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_I(b, c, d), X), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Function ConvertToWordArray(sMessage)
Dim lMessageLength
Dim lNumberOfWords
Dim lWordArray()
Dim lBytePosition
Dim lByteCount
Dim lWordCount
Const MODULUS_BITS = 512
Const CONGRUENT_BITS = 448
lMessageLength = Len(sMessage)
lNumberOfWords = (((lMessageLength + ((MODULUS_BITS - CONGRUENT_BITS) \ BITS_TO_A_BYTE)) \ (MODULUS_BITS \ BITS_TO_A_BYTE)) + 1) * (MODULUS_BITS \ BITS_TO_A_WORD)
ReDim lWordArray(lNumberOfWords - 1)
lBytePosition = 0
lByteCount = 0
Do Until lByteCount >= lMessageLength
lWordCount = lByteCount \ BYTES_TO_A_WORD
lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE
lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(Asc(Mid(sMessage, lByteCount + 1, 1)), lBytePosition)
lByteCount = lByteCount + 1
Loop
lWordCount = lByteCount \ BYTES_TO_A_WORD
lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE
lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(&H80, lBytePosition)
lWordArray(lNumberOfWords - 2) = LShift(lMessageLength, 3)
lWordArray(lNumberOfWords - 1) = RShift(lMessageLength, 29)
ConvertToWordArray = lWordArray
End Function
Private Function WordToHex(lValue)
Dim lByte
Dim lCount
For lCount = 0 To 3
lByte = RShift(lValue, lCount * BITS_TO_A_BYTE) And m_lOnBits(BITS_TO_A_BYTE - 1)
WordToHex = WordToHex & Right("0" & Hex(lByte), 2)
Next
End Function
Public Function MD5(sMessage, stype)
m_lOnBits(0) = CLng(1)
m_lOnBits(1) = CLng(3)
m_lOnBits(2) = CLng(7)
m_lOnBits(3) = CLng(15)
m_lOnBits(4) = CLng(31)
m_lOnBits(5) = CLng(63)
m_lOnBits(6) = CLng(127)
m_lOnBits(7) = CLng(255)
m_lOnBits(8) = CLng(511)
m_lOnBits(9) = CLng(1023)
m_lOnBits(10) = CLng(2047)
m_lOnBits(11) = CLng(4095)
m_lOnBits(12) = CLng(8191)
m_lOnBits(13) = CLng(16383)
m_lOnBits(14) = CLng(32767)
m_lOnBits(15) = CLng(65535)
m_lOnBits(16) = CLng(131071)
m_lOnBits(17) = CLng(262143)
m_lOnBits(18) = CLng(524287)
m_lOnBits(19) = CLng(1048575)
m_lOnBits(20) = CLng(2097151)
m_lOnBits(21) = CLng(4194303)
m_lOnBits(22) = CLng(8388607)
m_lOnBits(23) = CLng(16777215)
m_lOnBits(24) = CLng(33554431)
m_lOnBits(25) = CLng(67108863)
m_lOnBits(26) = CLng(134217727)
m_lOnBits(27) = CLng(268435455)
m_lOnBits(28) = CLng(536870911)
m_lOnBits(29) = CLng(1073741823)
m_lOnBits(30) = CLng(2147483647)
m_l2Power(0) = CLng(1)
m_l2Power(1) = CLng(2)
m_l2Power(2) = CLng(4)
m_l2Power(3) = CLng(8)
m_l2Power(4) = CLng(16)
m_l2Power(5) = CLng(32)
m_l2Power(6) = CLng(64)
m_l2Power(7) = CLng(128)
m_l2Power(8) = CLng(256)
m_l2Power(9) = CLng(512)
m_l2Power(10) = CLng(1024)
m_l2Power(11) = CLng(2048)
m_l2Power(12) = CLng(4096)
m_l2Power(13) = CLng(8192)
m_l2Power(14) = CLng(16384)
m_l2Power(15) = CLng(32768)
m_l2Power(16) = CLng(65536)
m_l2Power(17) = CLng(131072)
m_l2Power(18) = CLng(262144)
m_l2Power(19) = CLng(524288)
m_l2Power(20) = CLng(1048576)
m_l2Power(21) = CLng(2097152)
m_l2Power(22) = CLng(4194304)
m_l2Power(23) = CLng(8388608)
m_l2Power(24) = CLng(16777216)
m_l2Power(25) = CLng(33554432)
m_l2Power(26) = CLng(67108864)
m_l2Power(27) = CLng(134217728)
m_l2Power(28) = CLng(268435456)
m_l2Power(29) = CLng(536870912)
m_l2Power(30) = CLng(1073741824)
Dim X
Dim k
Dim AA
Dim BB
Dim CC
Dim DD
Dim a
Dim b
Dim c
Dim d
Const S11 = 7
Const S12 = 12
Const S13 = 17
Const S14 = 22
Const S21 = 5
Const S22 = 9
Const S23 = 14
Const S24 = 20
Const S31 = 4
Const S32 = 11
Const S33 = 16
Const S34 = 23
Const S41 = 6
Const S42 = 10
Const S43 = 15
Const S44 = 21
X = ConvertToWordArray(sMessage)
a = &H67452301
b = &HEFCDAB89
c = &H98BADCFE
d = &H10325476
For k = 0 To UBound(X) Step 16
AA = a
BB = b
CC = c
DD = d
md5_FF a, b, c, d, X(k + 0), S11, &HD76AA478
md5_FF d, a, b, c, X(k + 1), S12, &HE8C7B756
md5_FF c, d, a, b, X(k + 2), S13, &H242070DB
md5_FF b, c, d, a, X(k + 3), S14, &HC1BDCEEE
md5_FF a, b, c, d, X(k + 4), S11, &HF57C0FAF
md5_FF d, a, b, c, X(k + 5), S12, &H4787C62A
md5_FF c, d, a, b, X(k + 6), S13, &HA8304613
md5_FF b, c, d, a, X(k + 7), S14, &HFD469501
md5_FF a, b, c, d, X(k + 8), S11, &H698098D8
md5_FF d, a, b, c, X(k + 9), S12, &H8B44F7AF
md5_FF c, d, a, b, X(k + 10), S13, &HFFFF5BB1
md5_FF b, c, d, a, X(k + 11), S14, &H895CD7BE
md5_FF a, b, c, d, X(k + 12), S11, &H6B901122
md5_FF d, a, b, c, X(k + 13), S12, &HFD987193
md5_FF c, d, a, b, X(k + 14), S13, &HA679438E
md5_FF b, c, d, a, X(k + 15), S14, &H49B40821
md5_GG a, b, c, d, X(k + 1), S21, &HF61E2562
md5_GG d, a, b, c, X(k + 6), S22, &HC040B340
md5_GG c, d, a, b, X(k + 11), S23, &H265E5A51
md5_GG b, c, d, a, X(k + 0), S24, &HE9B6C7AA
md5_GG a, b, c, d, X(k + 5), S21, &HD62F105D
md5_GG d, a, b, c, X(k + 10), S22, &H2441453
md5_GG c, d, a, b, X(k + 15), S23, &HD8A1E681
md5_GG b, c, d, a, X(k + 4), S24, &HE7D3FBC8
md5_GG a, b, c, d, X(k + 9), S21, &H21E1CDE6
md5_GG d, a, b, c, X(k + 14), S22, &HC33707D6
md5_GG c, d, a, b, X(k + 3), S23, &HF4D50D87
md5_GG b, c, d, a, X(k + 8), S24, &H455A14ED
md5_GG a, b, c, d, X(k + 13), S21, &HA9E3E905
md5_GG d, a, b, c, X(k + 2), S22, &HFCEFA3F8
md5_GG c, d, a, b, X(k + 7), S23, &H676F02D9
md5_GG b, c, d, a, X(k + 12), S24, &H8D2A4C8A
md5_HH a, b, c, d, X(k + 5), S31, &HFFFA3942
md5_HH d, a, b, c, X(k + 8), S32, &H8771F681
md5_HH c, d, a, b, X(k + 11), S33, &H6D9D6122
md5_HH b, c, d, a, X(k + 14), S34, &HFDE5380C
md5_HH a, b, c, d, X(k + 1), S31, &HA4BEEA44
md5_HH d, a, b, c, X(k + 4), S32, &H4BDECFA9
md5_HH c, d, a, b, X(k + 7), S33, &HF6BB4B60
md5_HH b, c, d, a, X(k + 10), S34, &HBEBFBC70
md5_HH a, b, c, d, X(k + 13), S31, &H289B7EC6
md5_HH d, a, b, c, X(k + 0), S32, &HEAA127FA
md5_HH c, d, a, b, X(k + 3), S33, &HD4EF3085
md5_HH b, c, d, a, X(k + 6), S34, &H4881D05
md5_HH a, b, c, d, X(k + 9), S31, &HD9D4D039
md5_HH d, a, b, c, X(k + 12), S32, &HE6DB99E5
md5_HH c, d, a, b, X(k + 15), S33, &H1FA27CF8
md5_HH b, c, d, a, X(k + 2), S34, &HC4AC5665
md5_II a, b, c, d, X(k + 0), S41, &HF4292244
md5_II d, a, b, c, X(k + 7), S42, &H432AFF97
md5_II c, d, a, b, X(k + 14), S43, &HAB9423A7
md5_II b, c, d, a, X(k + 5), S44, &HFC93A039
md5_II a, b, c, d, X(k + 12), S41, &H655B59C3
md5_II d, a, b, c, X(k + 3), S42, &H8F0CCC92
md5_II c, d, a, b, X(k + 10), S43, &HFFEFF47D
md5_II b, c, d, a, X(k + 1), S44, &H85845DD1
md5_II a, b, c, d, X(k + 8), S41, &H6FA87E4F
md5_II d, a, b, c, X(k + 15), S42, &HFE2CE6E0
md5_II c, d, a, b, X(k + 6), S43, &HA3014314
md5_II b, c, d, a, X(k + 13), S44, &H4E0811A1
md5_II a, b, c, d, X(k + 4), S41, &HF7537E82
md5_II d, a, b, c, X(k + 11), S42, &HBD3AF235
md5_II c, d, a, b, X(k + 2), S43, &H2AD7D2BB
md5_II b, c, d, a, X(k + 9), S44, &HEB86D391
a = AddUnsigned(a, AA)
b = AddUnsigned(b, BB)
c = AddUnsigned(c, CC)
d = AddUnsigned(d, DD)
Next
If stype = 32 Then
MD5 = LCase(WordToHex(a) & WordToHex(b) & WordToHex(c) & WordToHex(d))
Else
MD5 = LCase(WordToHex(b) & WordToHex(c))
End If
End Function
Private Function AddUnsigned(lX, lY)
Dim lX4
Dim lY4
Dim lX8
Dim lY8
Dim lResult
lX8 = lX And &H80000000
lY8 = lY And &H80000000
lX4 = lX And &H40000000
lY4 = lY And &H40000000
lResult = (lX And &H3FFFFFFF) + (lY And &H3FFFFFFF)
If lX4 And lY4 Then
lResult = lResult Xor &H80000000 Xor lX8 Xor lY8
ElseIf lX4 Or lY4 Then
If lResult And &H40000000 Then
lResult = lResult Xor &HC0000000 Xor lX8 Xor lY8
Else
lResult = lResult Xor &H40000000 Xor lX8 Xor lY8
End If
Else
lResult = lResult Xor lX8 Xor lY8
End If
AddUnsigned = lResult
End Function
Private Function LShift(lValue, iShiftBits)
If iShiftBits = 0 Then
LShift = lValue
Exit Function
ElseIf iShiftBits = 31 Then
If lValue And 1 Then
LShift = &H80000000
Else
LShift = 0
End If
Exit Function
ElseIf iShiftBits < 0 Or iShiftBits > 31 Then
Err.Raise 6
End If
If (lValue And m_l2Power(31 - iShiftBits)) Then
LShift = ((lValue And m_lOnBits(31 - (iShiftBits + 1))) * m_l2Power(iShiftBits)) Or &H80000000
Else
LShift = ((lValue And m_lOnBits(31 - iShiftBits)) * m_l2Power(iShiftBits))
End If
End Function
Private Function RShift(lValue, iShiftBits)
If iShiftBits = 0 Then
RShift = lValue
Exit Function
ElseIf iShiftBits = 31 Then
If lValue And &H80000000 Then
RShift = 1
Else
RShift = 0
End If
Exit Function
ElseIf iShiftBits < 0 Or iShiftBits > 31 Then
Err.Raise 6
End If
RShift = (lValue And &H7FFFFFFE) \ m_l2Power(iShiftBits)
If (lValue And &H80000000) Then
RShift = (RShift Or (&H40000000 \ m_l2Power(iShiftBits - 1)))
End If
End Function
Private Function RotateLeft(lValue, iShiftBits)
RotateLeft = LShift(lValue, iShiftBits) Or RShift(lValue, (32 - iShiftBits))
End Function
Public Function Str2QQPwdHash(Str1 As String)
Str2QQPwdHash = Hex2Base64(MD5(Str1, 32)) & "=="
End Function
'Private Sub Form_Load()
'Dim QQPath, QQNum, QQPass
'QQPath = "E:\聊天工具\QQ\QQ.exe" 'QQ所在路徑
'QQNum = "100000" 'QQ號碼
'QQPass = "阿蘇達三" 'QQ密碼
'Shell QQPath & " /START QQUIN:" & QQNum & " PWDHASH:" & Str2QQPwdHash(Trim(QQPass)) & " /STAT:40" '在線為41，隱身為40
'End '不想form退出,此處的end刪除或加'
'End Sub
'如果想運行程序就登陸的話，不要下面的command1的代碼，將formload代碼前的 ' 全部去掉~
'寫在最後，QQNum = "QQ號碼" 和 QQPass = "QQ密碼" 你可以用如下來代替~放在 command1 中,並將formload全部刪除，如下:
Private Sub Command1_Click()
Dim QQPath, QQNum, QQPass
QQPath = Text1.Text 'QQ所在路徑
QQNum = Text2.Text 'QQ號碼
QQPass = Text3.Text 'QQ密碼
Shell QQPath & " /START QQUIN:" & QQNum & " PWDHASH:" & Str2QQPwdHash(Trim(QQPass)) & " /STAT:40" '在線為41，隱身為40
End Sub
㈤ vb怎樣加密明文
MD5 或者Base64 加密。
下面是兩個加密方法的代碼，
建個模塊把下面代碼放進去。
'%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
'% %
'% -------------- MD5 加密模塊 ---------------- %
'% ------------- Base64編碼模塊 --------------- %
'% %
'%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Private m_lOnBits(30)
Private m_l2Power(30)
Private Const BITS_TO_A_BYTE = 8
Private Const BYTES_TO_A_WORD = 4
Private Const BITS_TO_A_WORD = 32
Function Hex2Bin(HexStr1 As String)
Select Case UCase(HexStr1)
'16進制轉換二進制
Case "0"
q1 = "0000"
Case "1"
q1 = "0001"
Case "2"
q1 = "0010"
Case "3"
q1 = "0011"
Case "4"
q1 = "0100"
Case "5"
q1 = "0101"
Case "6"
q1 = "0110"
Case "7"
q1 = "0111"
Case "8"
q1 = "1000"
Case "9"
q1 = "1001"
Case "A"
q1 = "1010"
Case "B"
q1 = "1011"
Case "C"
q1 = "1100"
Case "D"
q1 = "1101"
Case "E"
q1 = "1110"
Case "F"
q1 = "1111"
End Select
Hex2Bin = q1
End Function
Function Hex2Bin1(HexStr2 As String)
'分斷
q1 = Hex2Bin(Mid(HexStr2, 1, 1))
q2 = Hex2Bin(Mid(HexStr2, 2, 1))
q3 = Hex2Bin(Mid(HexStr2, 3, 1))
q4 = Hex2Bin(Mid(HexStr2, 4, 1))
q5 = Hex2Bin(Mid(HexStr2, 5, 1))
q6 = Hex2Bin(Mid(HexStr2, 6, 1))
q7 = Hex2Bin(Mid(HexStr2, 7, 1))
q8 = Hex2Bin(Mid(HexStr2, 8, 1))
q9 = Hex2Bin(Mid(HexStr2, 9, 1))
q10 = Hex2Bin(Mid(HexStr2, 10, 1))
q11 = Hex2Bin(Mid(HexStr2, 11, 1))
q12 = Hex2Bin(Mid(HexStr2, 12, 1))
Hex2Bin1 = q1 & q2 & q3 & q4 & q5 & q6 & q7 & q8 & q9 & q10 & q11 & q12
End Function
Function Bin324(BinCode1 As String)
'填充
q1 = Mid(BinCode1, 1, 6)
q2 = Mid(BinCode1, 7, 6)
q3 = Mid(BinCode1, 13, 6)
q4 = Mid(BinCode1, 19, 6)
q5 = Mid(BinCode1, 25, 6)
q6 = Mid(BinCode1, 31, 6)
q7 = Mid(BinCode1, 37, 6)
q8 = Mid(BinCode1, 43, 6)
Bin324 = "00" & q1 & "00" & q2 & "00" & q3 & "00" & q4 & "00" & q5 & "00" & q6 & "00" & q7 & "00" & q8
End Function
Function Bin2Hex(BinCode2 As String)
'二進制轉換為16進制（BASE64一部分）
Select Case UCase(BinCode2)
Case "0000"
q1 = "0"
Case "0001"
q1 = "1"
Case "0010"
q1 = "2"
Case "0011"
q1 = "3"
Case "0100"
q1 = "4"
Case "0101"
q1 = "5"
Case "0110"
q1 = "6"
Case "0111"
q1 = "7"
Case "1000"
q1 = "8"
Case "1001"
q1 = "9"
Case "1010"
q1 = "A"
Case "1011"
q1 = "B"
Case "1100"
q1 = "C"
Case "1101"
q1 = "D"
Case "1110"
q1 = "E"
Case "1111"
q1 = "F"
End Select
Bin2Hex = q1
End Function
Function Bin2Hex2(BinCode As String)
q1 = Bin2Hex(Mid(BinCode, 1, 4))
q2 = Bin2Hex(Mid(BinCode, 5, 4))
q3 = Bin2Hex(Mid(BinCode, 9, 4))
q4 = Bin2Hex(Mid(BinCode, 13, 4))
Bin2Hex2 = q1 & q2 & q3 & q4
End Function
Function Bin2Hex3(BinCode3 As String)
q1 = Bin2Hex2(Mid(BinCode3, 1, 16))
q2 = Bin2Hex2(Mid(BinCode3, 17, 16))
q3 = Bin2Hex2(Mid(BinCode3, 33, 16))
q4 = Bin2Hex2(Mid(BinCode3, 49, 16))
Bin2Hex3 = q1 & q2 & q3 & q4
End Function
Function HexBase64(HexString As String)
HexBase64 = HexBase64_2(Bin2Hex3(Bin324(Hex2Bin1(HexString))))
End Function
Function HexBase64_1(HexString As String)
Select Case HexString
Case "00"
q1 = "A"
Case "01"
q1 = "B"
Case "02"
q1 = "C"
Case "03"
q1 = "D"
Case "04"
q1 = "E"
Case "05"
q1 = "F"
Case "06"
q1 = "G"
Case "07"
q1 = "H"
Case "08"
q1 = "I"
Case "09"
q1 = "J"
Case "0A"
q1 = "K"
Case "0B"
q1 = "L"
Case "0C"
q1 = "M"
Case "0D"
q1 = "N"
Case "0E"
q1 = "O"
Case "0F"
q1 = "P"
Case "10"
q1 = "Q"
Case "11"
q1 = "R"
Case "12"
q1 = "S"
Case "13"
q1 = "T"
Case "14"
q1 = "U"
Case "15"
q1 = "V"
Case "16"
q1 = "W"
Case "17"
q1 = "X"
Case "18"
q1 = "Y"
Case "19"
q1 = "Z"
Case "1A"
q1 = "a"
Case "1B"
q1 = "b"
Case "1C"
q1 = "c"
Case "1D"
q1 = "d"
Case "1E"
q1 = "e"
Case "1F"
q1 = "f"
Case "20"
q1 = "g"
Case "21"
q1 = "h"
Case "22"
q1 = "i"
Case "23"
q1 = "j"
Case "24"
q1 = "k"
Case "25"
q1 = "l"
Case "26"
q1 = "m"
Case "27"
q1 = "n"
Case "28"
q1 = "o"
Case "29"
q1 = "p"
Case "2A"
q1 = "q"
Case "2B"
q1 = "r"
Case "2C"
q1 = "s"
Case "2D"
q1 = "t"
Case "2E"
q1 = "u"
Case "2F"
q1 = "v"
Case "30"
q1 = "w"
Case "31"
q1 = "x"
Case "32"
q1 = "y"
Case "33"
q1 = "z"
Case "34"
q1 = "0"
Case "35"
q1 = "1"
Case "36"
q1 = "2"
Case "37"
q1 = "3"
Case "38"
q1 = "4"
Case "39"
q1 = "5"
Case "3A"
q1 = "6"
Case "3B"
q1 = "7"
Case "3C"
q1 = "8"
Case "3D"
q1 = "9"
Case "3E"
q1 = "+"
Case "3F"
q1 = "/"
End Select
HexBase64_1 = q1
End Function
Function HexBase64_2(HexString As String)
q1 = HexBase64_1(Mid(HexString, 1, 2))
q2 = HexBase64_1(Mid(HexString, 3, 2))
q3 = HexBase64_1(Mid(HexString, 5, 2))
q4 = HexBase64_1(Mid(HexString, 7, 2))
q5 = HexBase64_1(Mid(HexString, 9, 2))
q6 = HexBase64_1(Mid(HexString, 11, 2))
q7 = HexBase64_1(Mid(HexString, 13, 2))
q8 = HexBase64_1(Mid(HexString, 15, 2))
HexBase64_2 = q1 & q2 & q3 & q4 & q5 & q6 & q7 & q8
End Function
Function Hex2Base64(HexCode As String)
For i = 0 To Len(HexCode) Step 12
q1 = q1 & HexBase64(Mid(HexCode, i + 1, 12))
Next
Hex2Base64 = q1
End Function
Private Function md5_F(x, y, z)
md5_F = (x And y) Or ((Not x) And z)
End Function
Private Function md5_G(x, y, z)
md5_G = (x And z) Or (y And (Not z))
End Function
Private Function md5_H(x, y, z)
md5_H = (x Xor y Xor z)
End Function
Private Function md5_I(x, y, z)
md5_I = (y Xor (x Or (Not z)))
End Function
Private Sub md5_FF(a, b, c, d, x, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_F(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Sub md5_GG(a, b, c, d, x, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_G(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Sub md5_HH(a, b, c, d, x, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_H(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Sub md5_II(a, b, c, d, x, s, ac)
a = AddUnsigned(a, AddUnsigned(AddUnsigned(md5_I(b, c, d), x), ac))
a = RotateLeft(a, s)
a = AddUnsigned(a, b)
End Sub
Private Function ConvertToWordArray(sMessage)
Dim lMessageLength
Dim lNumberOfWords
Dim lWordArray()
Dim lBytePosition
Dim lByteCount
Dim lWordCount
Const MODULUS_BITS = 512
Const CONGRUENT_BITS = 448
lMessageLength = Len(sMessage)
lNumberOfWords = (((lMessageLength + ((MODULUS_BITS - CONGRUENT_BITS) \ BITS_TO_A_BYTE)) \ (MODULUS_BITS \ BITS_TO_A_BYTE)) + 1) * (MODULUS_BITS \ BITS_TO_A_WORD)
ReDim lWordArray(lNumberOfWords - 1)
lBytePosition = 0
lByteCount = 0
Do Until lByteCount >= lMessageLength
lWordCount = lByteCount \ BYTES_TO_A_WORD
lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE
lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(Asc(Mid(sMessage, lByteCount + 1, 1)), lBytePosition)
lByteCount = lByteCount + 1
Loop
lWordCount = lByteCount \ BYTES_TO_A_WORD
lBytePosition = (lByteCount Mod BYTES_TO_A_WORD) * BITS_TO_A_BYTE
lWordArray(lWordCount) = lWordArray(lWordCount) Or LShift(&H80, lBytePosition)
lWordArray(lNumberOfWords - 2) = LShift(lMessageLength, 3)
lWordArray(lNumberOfWords - 1) = RShift(lMessageLength, 29)
ConvertToWordArray = lWordArray
End Function
Private Function WordToHex(lValue)
Dim lByte
Dim lCount
For lCount = 0 To 3
lByte = RShift(lValue, lCount * BITS_TO_A_BYTE) And m_lOnBits(BITS_TO_A_BYTE - 1)
WordToHex = WordToHex & Right("0" & Hex(lByte), 2)
Next
End Function
Public Function MD5(sMessage, stype)
m_lOnBits(0) = CLng(1)
m_lOnBits(1) = CLng(3)
m_lOnBits(2) = CLng(7)
m_lOnBits(3) = CLng(15)
m_lOnBits(4) = CLng(31)
m_lOnBits(5) = CLng(63)
m_lOnBits(6) = CLng(127)
m_lOnBits(7) = CLng(255)
m_lOnBits(8) = CLng(511)
m_lOnBits(9) = CLng(1023)
m_lOnBits(10) = CLng(2047)
m_lOnBits(11) = CLng(4095)
m_lOnBits(12) = CLng(8191)
m_lOnBits(13) = CLng(16383)
m_lOnBits(14) = CLng(32767)
m_lOnBits(15) = CLng(65535)
m_lOnBits(16) = CLng(131071)
m_lOnBits(17) = CLng(262143)
m_lOnBits(18) = CLng(524287)
m_lOnBits(19) = CLng(1048575)
m_lOnBits(20) = CLng(2097151)
m_lOnBits(21) = CLng(4194303)
m_lOnBits(22) = CLng(8388607)
m_lOnBits(23) = CLng(16777215)
m_lOnBits(24) = CLng(33554431)
m_lOnBits(25) = CLng(67108863)
m_lOnBits(26) = CLng(134217727)
m_lOnBits(27) = CLng(268435455)
m_lOnBits(28) = CLng(536870911)
m_lOnBits(29) = CLng(1073741823)
m_lOnBits(30) = CLng(2147483647)
m_l2Power(0) = CLng(1)
m_l2Power(1) = CLng(2)
m_l2Power(2) = CLng(4)
m_l2Power(3) = CLng(8)
m_l2Power(4) = CLng(16)
m_l2Power(5) = CLng(32)
m_l2Power(6) = CLng(64)
m_l2Power(7) = CLng(128)
m_l2Power(8) = CLng(256)
m_l2Power(9) = CLng(512)
m_l2Power(10) = CLng(1024)
m_l2Power(11) = CLng(2048)
m_l2Power(12) = CLng(4096)
m_l2Power(13) = CLng(8192)
m_l2Power(14) = CLng(16384)
m_l2Power(15) = CLng(32768)
m_l2Power(16) = CLng(65536)
m_l2Power(17) = CLng(131072)
m_l2Power(18) = CLng(262144)
m_l2Power(19) = CLng(524288)
m_l2Power(20) = CLng(1048576)
m_l2Power(21) = CLng(2097152)
m_l2Power(22) = CLng(4194304)
m_l2Power(23) = CLng(8388608)
m_l2Power(24) = CLng(16777216)
m_l2Power(25) = CLng(33554432)
m_l2Power(26) = CLng(67108864)
m_l2Power(27) = CLng(134217728)
m_l2Power(28) = CLng(268435456)
m_l2Power(29) = CLng(536870912)
m_l2Power(30) = CLng(1073741824)
Dim x
Dim k
Dim AA
Dim BB
Dim CC
Dim DD
Dim a
Dim b
Dim c
Dim d
Const S11 = 7
Const S12 = 12
Const S13 = 17
Const S14 = 22
Const S21 = 5
Const S22 = 9
Const S23 = 14
Const S24 = 20
Const S31 = 4
Const S32 = 11
Const S33 = 16
Const S34 = 23
Const S41 = 6
Const S42 = 10
Const S43 = 15
Const S44 = 21
x = ConvertToWordArray(sMessage)
a = &H67452301
b = &HEFCDAB89
c = &H98BADCFE
d = &H10325476
For k = 0 To UBound(x) Step 16
AA = a
BB = b
CC = c
DD = d
md5_FF a, b, c, d, x(k + 0), S11, &HD76AA478
md5_FF d, a, b, c, x(k + 1), S12, &HE8C7B756
md5_FF c, d, a, b, x(k + 2), S13, &H242070DB
md5_FF b, c, d, a, x(k + 3), S14, &HC1BDCEEE
md5_FF a, b, c, d, x(k + 4), S11, &HF57C0FAF
md5_FF d, a, b, c, x(k + 5), S12, &H4787C62A
md5_FF c, d, a, b, x(k + 6), S13, &HA8304613
md5_FF b, c, d, a, x(k + 7), S14, &HFD469501
md5_FF a, b, c, d, x(k + 8), S11, &H698098D8
md5_FF d, a, b, c, x(k + 9), S12, &H8B44F7AF
md5_FF c, d, a, b, x(k + 10), S13, &HFFFF5BB1
md5_FF b, c, d, a, x(k + 11), S14, &H895CD7BE
md5_FF a, b, c, d, x(k + 12), S11, &H6B901122
md5_FF d, a, b, c, x(k + 13), S12, &HFD987193
md5_FF c, d, a, b, x(k + 14), S13, &HA679438E
md5_FF b, c, d, a, x(k + 15), S14, &H49B40821
md5_GG a, b, c, d, x(k + 1), S21, &HF61E2562
md5_GG d, a, b, c, x(k + 6), S22, &HC040B340
md5_GG c, d, a, b, x(k + 11), S23, &H265E5A51
md5_GG b, c, d, a, x(k + 0), S24, &HE9B6C7AA
md5_GG a, b, c, d, x(k + 5), S21, &HD62F105D
md5_GG d, a, b, c, x(k + 10), S22, &H2441453
md5_GG c, d, a, b, x(k + 15), S23, &HD8A1E681
md5_GG b, c, d, a, x(k + 4), S24, &HE7D3FBC8
md5_GG a, b, c, d, x(k + 9), S21, &H21E1CDE6
md5_GG d, a, b, c, x(k + 14), S22, &HC33707D6
md5_GG c, d, a, b, x(k + 3), S23, &HF4D50D87
md5_GG b, c, d, a, x(k + 8), S24, &H455A14ED
md5_GG a, b, c, d, x(k + 13), S21, &HA9E3E905
md5_GG d, a, b, c, x(k + 2), S22, &HFCEFA3F8
md5_GG c, d, a, b, x(k + 7), S23, &H676F02D9
md5_GG b, c, d, a, x(k + 12), S24, &H8D2A4C8A
md5_HH a, b, c, d, x(k + 5), S31, &HFFFA3942
md5_HH d, a, b, c, x(k + 8), S32, &H8771F681
md5_HH c, d, a, b, x(k + 11), S33, &H6D9D6122
md5_HH b, c, d, a, x(k + 14), S34, &HFDE5380C
md5_HH a, b, c, d, x(k + 1), S31, &HA4BEEA44
md5_HH d, a, b, c, x(k + 4), S32, &H4BDECFA9
md5_HH c, d, a, b, x(k + 7), S33, &HF6BB4B60
md5_HH b, c, d, a, x(k + 10), S34, &HBEBFBC70
md5_HH a, b, c, d, x(k + 13), S31, &H289B7EC6
md5_HH d, a, b, c, x(k + 0), S32, &HEAA127FA
md5_HH c, d, a, b, x(k + 3), S33, &HD4EF3085
md5_HH b, c, d, a, x(k + 6), S34, &H4881D05
md5_HH a, b, c, d, x(k + 9), S31, &HD9D4D039
md5_HH d, a, b, c, x(k + 12), S32, &HE6DB99E5
md5_HH c, d, a, b, x(k + 15), S33, &H1FA27CF8
md5_HH b, c, d, a, x(k + 2), S34, &HC4AC5665
md5_II a, b, c, d, x(k + 0), S41, &HF4292244
md5_II d, a, b, c, x(k + 7), S42, &H432AFF97
md5_II c, d, a, b, x(k + 14), S43, &HAB9423A7
md5_II b, c, d, a, x(k + 5), S44, &HFC93A039
md5_II a, b, c, d, x(k + 12), S41, &H655B59C3
md5_II d, a, b, c, x(k + 3), S42, &H8F0CCC92
md5_II c, d, a, b, x(k + 10), S43, &HFFEFF47D
md5_II b, c, d, a, x(k + 1), S44, &H85845DD1
md5_II a, b, c, d, x(k + 8), S41, &H6FA87E4F
md5_II d, a, b, c, x(k + 15), S42, &HFE2CE6E0
md5_II c, d, a, b, x(k + 6), S43, &HA3014314
md5_II b, c, d, a, x(k + 13), S44, &H4E0811A1
md5_II a, b, c, d, x(k + 4), S41, &HF7537E82
md5_II d, a, b, c, x(k + 11), S42, &HBD3AF235
md5_II c, d, a, b, x(k + 2), S43, &H2AD7D2BB
md5_II b, c, d, a, x(k + 9), S44, &HEB86D391
a = AddUnsigned(a, AA)
b = AddUnsigned(b, BB)
c = AddUnsigned(c, CC)
d = AddUnsigned(d, DD)
Next
If stype = 32 Then
MD5 = LCase(WordToHex(a) & WordToHex(b) & WordToHex(c) & WordToHex(d))
Else
MD5 = LCase(WordToHex(b) & WordToHex(c))
End If
End Function
Private Function AddUnsigned(lX, lY)
Dim lX4
Dim lY4
Dim lX8
Dim lY8
Dim lResult
lX8 = lX And &H80000000
lY8 = lY And &H80000000
lX4 = lX And &H40000000
lY4 = lY And &H40000000
lResult = (lX And &H3FFFFFFF) + (lY And &H3FFFFFFF)
If lX4 And lY4 Then
lResult = lResult Xor &H80000000 Xor lX8 Xor lY8
ElseIf lX4 Or lY4 Then
If lResult And &H40000000 Then
lResult = lResult Xor &HC0000000 Xor lX8 Xor lY8
Else
lResult = lResult Xor &H40000000 Xor lX8 Xor lY8
End If
Else
lResult = lResult Xor lX8 Xor lY8
End If
AddUnsigned = lResult
End Function
Private Function LShift(lValue, iShiftBits)
If iShiftBits = 0 Then
LShift = lValue
Exit Function
ElseIf iShiftBits = 31 Then
If lValue And 1 Then
LShift = &H80000000
Else
LShift = 0
End If
Exit Function
ElseIf iShiftBits < 0 Or iShiftBits > 31 Then
Err.Raise 6
End If
If (lValue And m_l2Power(31 - iShiftBits)) Then
LShift = ((lValue And m_lOnBits(31 - (iShiftBits + 1))) * m_l2Power(iShiftBits)) Or &H80000000
Else
LShift = ((lValue And m_lOnBits(31 - iShiftBits)) * m_l2Power(iShiftBits))
End If
End Function
Private Function RShift(lValue, iShiftBits)
If iShiftBits = 0 Then
RShift = lValue
Exit Function
ElseIf iShiftBits = 31 Then
If lValue And &H80000000 Then
RShift = 1
Else
RShift = 0
End If
Exit Function
ElseIf iShiftBits < 0 Or iShiftBits > 31 Then
Err.Raise 6
End If
RShift = (lValue And &H7FFFFFFE) \ m_l2Power(iShiftBits)
If (lValue And &H80000000) Then
RShift = (RShift Or (&H40000000 \ m_l2Power(iShiftBits - 1)))
End If
End Function
Private Function RotateLeft(lValue, iShiftBits)
RotateLeft = LShift(lValue, iShiftBits) Or RShift(lValue, (32 - iShiftBits))
End Function
Public Function Str2QQPwdHash(Str1 As String)
Str2QQPwdHash = Hex2Base64(MD5(Str1, 32)) & "=="
End Function
㈥ 01加密方式-Base64編碼
說明
HTTP將Base64編碼用於基本的認證和摘要認證。
其可以方便的將用戶的任何輸入轉換成只包含特定字元的安全格式，服務於網路通信過程。
特點
1）可以將任意的二進制數據進行Base64編碼。
2）所有的數據都能被編碼為並只用65個字元就能表示的文本文件。
3）編碼後的65個字元包括A Z,a z,0~9,+,/,=
4）對文件或字元串進行Base64編碼後將比 原始大小增加33% 。
5)能夠逆運算
6）不夠安全，但卻被很多加密演算法作為編碼方式
1）將所有字元轉化為ASCII碼；
2）將ASCII碼轉化為8位二進制；
3）將二進制3個歸成一組(不足3個在後邊補0)共24位，再拆分成4組，每組6位；
4）統一在6位二進制前補兩個0湊足8位；
5）將補0後的二進制轉為十進制；
6）從Base64編碼表獲取十進制對應的Base64編碼；
a.轉換的時候，將三個byte的數據，先後放入一個24bit的緩沖區中，先來的byte占高位。
b.數據不足3byte的話，則剩下的bit用0補足。每次取出6個bit，按照其值選擇查表選擇對應的字元作為編碼後的輸出。
c.不斷進行，直到全部輸入數據轉換完成。
d.如果最後剩下兩個輸入數據，在編碼結果後加1個「=」；
e.如果最後剩下一個輸入數據，編碼結果後加2個「=」；
f.如果沒有剩下任何數據，就什麼都不要加，這樣才可以保證資料還原的正確性。
運行效果圖
㈦ 偽加密演算法：Base64
做過網路通信的iOSer對Base64都不會很陌生，涉及加密的數據通常會在傳輸之前做一次Base64轉換，一般形式如下 Base64(DES/AES(Data)) ，所以有些iOSer就把Base64當作加密演算法的一種，甚至一些在線工具也直接稱呼Base64為加密/解密，實際上這誤會可大了，本篇回答以下三個問題：
要回答第一個問題，首先來看看Base64的編碼過程，這里以字元串 「1234」 為例，經過Base64編碼後，結果為 "MTIzNA==" ，也是一個字元串，過程如下：
看到這里，你會疑問，這樣的編碼有什麼用？
Base64真正的作用不是將字元串轉換為另一個字元串，而是將任意二進制轉換為字元串，這個字元串的范圍還很小，只有64個，這就為那些只能傳輸字元串的協議傳輸數據帶來方便，比如http，通過一些字元的替換，還可以避免特殊字元的沖突。
蘋果已經提供了原生的API，用Swift做Base64編碼：
NSData.Base64EncodingOptions 有四個可選值：
可以組合使用：
編碼結果按76個字元換行，換行符為\r。
解碼方法如下：
思考題：
編碼過程中，6位補8位的規則是什麼，是高位補0還是低位，為什麼？經過深入思考的結果才是自己的哦，歡迎你的留言👏
㈧ 求教VB6.0關於BASE64加密演算法錯誤問題
Option Explicit
Private Const BASE64CHR As String = "+/="
Private psBase64Chr(0 To 63) As String
'從一個經過Base64的字元串中解碼到源字元串
Public Function DecodeBase64String(str2Decode As String) As String
DecodeBase64String = StrConv(DecodeBase64Byte(str2Decode), vbUnicode)
End Function
'從一個經過Base64的字元串中解碼到源位元組數組
Public Function DecodeBase64Byte(str2Decode As String) As Byte()
Dim lPtr As Long
Dim iValue As Integer
Dim iLen As Integer
Dim iCtr As Integer
Dim Bits(1 To 4) As Byte
Dim strDecode As String
Dim str As String
Dim Output() As Byte
Dim iIndex As Long
Dim lFrom As Long
Dim lTo As Long
InitBase
'//除去回車
str = Replace(str2Decode, vbCrLf, "")
'//每4個字元一組（4個字元表示3個字）
For lPtr = 1 To Len(str) Step 4
iLen = 4
For iCtr = 0 To 3
'//查找字元在BASE64字元串中的位置
iValue = InStr(1, BASE64CHR, Mid$(str, lPtr + iCtr, 1), vbBinaryCompare)
Select Case iValue 'A~Za~z0~9+/
Case 1 To 64:
Bits(iCtr + 1) = iValue - 1
Case 65 '=
iLen = iCtr
Exit For
'//沒有發現
Case 0: Exit Function
End Select
Next
'//轉換4個6比特數成為3個8比特數
Bits(1) = Bits(1) * &H4 + (Bits(2) And &H30) \ &H10
Bits(2) = (Bits(2) And &HF) * &H10 + (Bits(3) And &H3C) \ &H4
Bits(3) = (Bits(3) And &H3) * &H40 + Bits(4)
'//計算數組的起始位置
lFrom = lTo
lTo = lTo + (iLen - 1) - 1
'//重新定義輸出數組
ReDim Preserve Output(0 To lTo)
For iIndex = lFrom To lTo
Output(iIndex) = Bits(iIndex - lFrom + 1)
Next
lTo = lTo + 1
Next
DecodeBase64Byte = Output
End Function
'將一個Base64字元串解碼，並寫入二進制文件
Public Sub DecodeBase64StringToFile(strBase64 As String, strFilePath As String)
Dim fso As New Scripting.FileSystemObject, _
i As Long
If fso.FileExists(strFilePath) Then
fso.DeleteFile strFilePath, True
End If
i = FreeFile
Open strFilePath For Binary Access Write As i
Put i, , DecodeBase64Byte(strBase64)
Close i
Set fso = Nothing
End Sub
'將一個Base64編碼文件解碼，並寫入二進制文件
Public Sub DecodeBase64FileToFile(strBase64FilePath As String, strFilePath As String)
Dim fso As New Scripting.FileSystemObject
Dim ts As TextStream
If Not fso.FileExists(strBase64FilePath) Then Exit Sub
Set ts = fso.OpenTextFile(strBase64FilePath)
DecodeBase64StringToFile ts.ReadAll, strFilePath
End Sub
'將一個位元組數組進行Base64編碼，並返回字元串
Public Function EncodeBase64Byte(sValue() As Byte) As String
Dim lCtr As Long
Dim lPtr As Long
Dim lLen As Long
Dim sEncoded As String
Dim Bits8(1 To 3) As Byte
Dim Bits6(1 To 4) As Byte
Dim i As Integer
InitBase
For lCtr = 1 To UBound(sValue) + 1 Step 3
For i = 1 To 3
If lCtr + i - 2 <= UBound(sValue) Then
Bits8(i) = sValue(lCtr + i - 2)
lLen = 3
Else
Bits8(i) = 0
lLen = lLen - 1
End If
Next
'//轉換字元串為數組，然後轉換為4個6位(0-63)
Bits6(1) = (Bits8(1) And &HFC) \ 4
Bits6(2) = (Bits8(1) And &H3) * &H10 + (Bits8(2) And &HF0) \ &H10
Bits6(3) = (Bits8(2) And &HF) * 4 + (Bits8(3) And &HC0) \ &H40
Bits6(4) = Bits8(3) And &H3F
'//添加4個新字元
For lPtr = 1 To lLen + 1
sEncoded = sEncoded & psBase64Chr(Bits6(lPtr))
Next
Next
'//不足4位，以=填充
Select Case lLen + 1
Case 2: sEncoded = sEncoded & "=="
Case 3: sEncoded = sEncoded & "="
Case 4:
End Select
EncodeBase64Byte = sEncoded
End Function
'對字元串進行Base64編碼並返回字元串
Public Function EncodeBase64String(str2Encode As String) As String
Dim sValue() As Byte
sValue = StrConv(str2Encode, vbFromUnicode)
EncodeBase64String = EncodeBase64Byte(sValue)
End Function
'對文件進行Base64編碼並返回編碼後的Base64字元串
Public Function EncodFileToBase64String(strFileSource As String)
Dim lpdata() As Byte, _
i As Long, _
n As Long, _
fso As New Scripting.FileSystemObject
If Not fso.FileExists(strFileSource) Then Exit Function
i = FreeFile
Open strFileSource For Binary Access Read Lock Write As i
n = LOF(i) - 1
ReDim lpdata(0 To n)
Get i, , lpdata
Close i
EncodFileToBase64String = EncodeBase64Byte(lpdata)
End Function
'對文件進行Base64編碼，並將編碼後的內容直接寫入一個文本文件中
Public Sub EncodFileToBase64File(strFileSource As String, strFileBase64Desti As String)
Dim fso As New FileSystemObject, _
ts As TextStream
Set ts = fso.CreateTextFile(strFileBase64Desti, True)
ts.Write (EncodFileToBase64String(strFileSource))
ts.Close
Set ts = Nothing
Set fso = Nothing
End Sub
Private Sub InitBase()
Dim iPtr As Integer
'初始化 BASE64數組
For iPtr = 0 To 63
psBase64Chr(iPtr) = Mid$(BASE64CHR, iPtr + 1, 1)
Next
End Sub