应该不行吧,如果用php调用编绎成功的C语言写的东东好像是可以的。
解决方案 »
- 两个一维数组 怎么交叉??在线等!
- preg_replace遇到问题,帮帮我!
- if条件判断后面的:冒号什么意思
- php提问
- 下载一个phpcms,进入后台看了它的模板,里面有自定义的if else,这是怎么实现的?
- 如何实现自定义session超时后的操作?
- 再问一下:一个正则表达式,表达一个字符串中不含"abc",如何写啊?
- 小道,,,, sohu http://life.women.sohu.com/diary/漏洞
- 大家好!怎样实现一个简单的自动检测系统?详细内容请进来看看!见者有分!
- 请问,代码哪里出现了问题,如果没有文件域直接点击上传按钮,我的逻辑是显示“别玩我了”。但是此时点击按钮没有效果
- 晕迷中,求救~
- 求助关于客户端机器名
wyzhf 发表于 2/27/2002 8:09:18 PM Visual Basic Base64算法是把3个8位字符(24)转换成4个6位字符(32),因此编码后的长度会扩大1/3,
进行编码转换时需要用到一张Base64的编码表:
Table 1: The Base64 Alphabet Value Encoding Value Encoding Value Encoding Value Encoding
0 A 17 R 34 i 51 z
1 B 18 S 35 j 52 0
2 C 19 T 36 k 53 1
3 D 20 U 37 l 54 2
4 E 21 V 38 m 55 3
5 F 22 W 39 n 56 4
6 G 23 X 40 o 57 5
7 H 24 Y 41 p 58 6
8 I 25 Z 42 q 59 7
9 J 26 a 43 r 60 8
10 K 27 b 44 s 61 9
11 L 28 c 45 t 62 +
12 M 29 d 46 u 63 /
13 N 30 e 47 v
14 O 31 f 48 w (pad) =
15 P 32 g 49 x
16 Q 33 h 50 y
在VB中可以简单的将其保存为一个常量:
Private Const Base64Table =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="编码过程是这样的,第一个字符通过右移2位获得第一个目标字符的Base64表位置,根据
这个数值取到表上相应的字符,就是第一个目标字符
,然后将第一个字符左移6位加上第二个字符右移4位,即获得第二个目标字符,再将第二
个字符左移4位加上第三个字符右移6位,获得第三个
目标字符,最后取第三个字符的右6位即获得第四个目标字符.例如我们取一个简单的字符串"TEST..."
将其用SourceByte = StrConv(SourceText, vbFromUnicode)转换后获得二进制数组:
T E S T ...
84 69 83 84 ...
01010100 01000101 01010011 01010100 ...
01010100/01000101/01010011/01010100
01010100010001010101001101010100
转换后:
01010100010001010101001101010100
010101/000100/010101/010011/010101/00
010101 000100 010101 010011 010101 00....
21 4 21 19 21 ...
V E V T V ...
最后得到的就是"VEVTV..."对于第一个目标字符我们可以这样做:
(SourceByte(1) and 252)/4
第二个:
(SourceByte(1) and 3)*64 + (SourceByte(2) and 240)/16
第三个:
(SourceByte(2) and 15)*16 + (SourceByte(3) and 48)/64
第四个:
(SourceByte(3) and 63)可惜只有这点点
great 发表于 2/1/2002 9:31:08 AM Joy ASP这是我看完几个base64编码、解码函数后自己改写的。
因为,在中文操作系统的VBscript中,使用的是unicode字符集,所以
很多base64编码、解码函数在理论上是正确的,但实际不能运行!我加写了几个Unicode与Ansi编码转换的函数,现贴出来,请大家执教!
文件名称base64test.asp<%sBASE_64_CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
sBASE_64_CHARACTERS = strUnicode2Ansi(sBASE_64_CHARACTERS)Function strUnicodeLen(asContents)
'计算unicode字符串的Ansi编码的长度
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 FunctionFunction strUnicode2Ansi(asContents)
'将Unicode编码的字符串,转换成Ansi编码的字符串
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 functionFunction strAnsi2Unicode(asContents)
'将Ansi编码的字符串,转换成Unicode编码的字符串
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 functionFunction Base64encode(asContents)
'将Ansi编码的字符串进行Base64编码
'asContents应当是ANSI编码的字符串(二进制的字符串也可以)
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,len2len1=Lenb(asContents)
if len1<1 then
Base64encode=""
exit Function
end ifm3=Len1 Mod 3
If M3 > 0 Then asContents = asContents & String(3-M3, chrb(0))
'补足位数是为了便于计算IF m3 > 0 THEN
len1=len1+(3-m3)
len2=len1-3
else
len2=len1
end iflsResult = "" 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 '处理最后剩余的几个字符
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) '用=号补足位数
else
lsGroup64 = Char1 & Char2 & Char3 & ChrB(61) '用=号补足位数
end if
lsResult = lsResult & lsGroup64
end ifBase64encode = lsResult End Function
Function Base64decode(asContents)
'将Base64编码字符串转换成Ansi编码的字符串
'asContents应当也是ANSI编码的字符串(二进制的字符串也可以)
Dim lsResult
Dim lnPosition
Dim lsGroup64, lsGroupBinary
Dim Char1, Char2, Char3, Char4
Dim Byte1, Byte2, Byte3
Dim M4,len1,len2len1= Lenb(asContents)
M4 = len1 Mod 4if len1 < 1 or M4 > 0 then
'字符串长度应当是4的倍数
Base64decode = ""
exit Function
end if
'判断最后一位是不是 = 号
'判断倒数第二位是不是 = 号
'这里m4表示最后剩余的需要单独处理的字符个数
if midb(asContents, len1, 1) = chrb(61) then m4=3
if midb(asContents, len1-1, 1) = chrb(61) then m4=2if m4 = 0 then
len2=len1
else
len2=len1-4
end ifFor 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 '处理最后剩余的几个字符
if M4 > 0 then
lsGroupBinary = ""
lsGroup64 = Midb(asContents, len2+1, m4) & chrB(65) 'chr(65)=A,转换成值为0
if M4=2 then '补足4位,是为了便于计算
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 ifBase64decode = lsResult End Function
'---------------------------------------------------------------------------------
response.write strUnicode2Ansi("abc我们d我们") & "<hr>"
response.write strAnsi2Unicode(Base64encode(strUnicode2Ansi("abc我们d我们"))) & "<hr>"
response.write strAnsi2Unicode(Base64encode(strUnicode2Ansi("abc我们d我们a"))) & "<hr>"
response.write strAnsi2Unicode(Base64encode(strUnicode2Ansi("abc我们d我们ab"))) & "<hr>"
response.write strAnsi2Unicode(Base64encode(strUnicode2Ansi("abc我们d我们abc"))) & "<hr>"response.write strAnsi2Unicode(Base64decode(Base64encode(strUnicode2Ansi("abc我们d我们")))) & "<hr>"
response.write strAnsi2Unicode(Base64decode(Base64encode(strUnicode2Ansi("abc我们d我们a")))) & "<hr>"
response.write strAnsi2Unicode(Base64decode(Base64encode(strUnicode2Ansi("abc我们d我们ab")))) & "<hr>"
response.write strAnsi2Unicode(Base64decode(Base64encode(strUnicode2Ansi("abc我们d我们abc")))) & "<hr>"
sdecode="Sm1haWy1xNb30qqyzsr9wdCx7Q0K1/fV36O6dG9ueTEzMiAgMjAwMC0wNS0yNNXixqq45bz+sbvU"
sdecode=sdecode & "xLbBPT0xNTK0zg0KIA0KDQqhoaGh1/fV3yBb0ru/y10gDQqhoaGhIA0KoaGhoQ0KoaGhocu1w/ej"
sdecode=sdecode & "urj8tuC1xNDFz6LH67LOv7xKbWFpbMu1w/ejrM7Sz+vV4tLRvq3X47m708O1xMHLoaMNCqGhoaEN"
sdecode=sdecode & "CqGhoaHT9rW9zsrM4sfrsrvSqs7KztKjrNLyzqq3/s7xxvfUrdLyo6zO0r32vfbKudPDQ0RPTlRT"
sdecode=sdecode & "t6LQxaOsU29ycnkuLi4NCqGhoaENCqGhoaGjqDGjqUJvZHmjqNDFvP7V/c7Eo6kgOiDX1rf7tK4N"
sdecode=sdecode & "CqGhoaENCqGhoaHI56O6Sk1haWwuQm9keSA9ICLV4sDvv8nS1MrH08O7p8zu0LS1xLHttaXE2sjd"
sdecode=sdecode & "o6y/ydLUyKHX1EZyb22hoyINCqGhoaENCqGhoaENCqGhoaGjqDKjqUNoYXJzZXSjqNfWt/u8r6Os"
sdecode=sdecode & "yLHKoc6qIlVTLUFTQ0lJIqOpIDog19a3+7SuDQqhoaGhDQqhoaGhyOejukpNYWlsLkNoYXJzZXQg"
sdecode=sdecode & "PSAiVVMtQVNDSUkiIA0KoaGhoQ0KoaGhoaOoM6OpQ29udGVudFRyYW5zZmVyRW5jb2RpbmcgOiDX"
sdecode=sdecode & "1rf7tK4NCqGhoaENCqGhoaHWuLaoxNrI3bSry83KsbXEseDC67e9yr2jrMixyqHKxyJRdW90ZWQt"
sdecode=sdecode & "UHJpbnRhYmxlIiANCqGhoaHI56O6Sk1haWwuQ29udGVudFRyYW5zZmVyRW5jb2RpbmcgPSAiYmFz"
sdecode=sdecode & "ZTY0Ig0KoaGhoQ0KoaGhoaOoNKOpQ29udGVudFR5cGWjqNDFvP61xGNvbnRlbnR5cGUuIMixyqHK"
sdecode=sdecode & "xyJ0ZXh0L3BsYWluIqOpIDog19a3+7SuDQqhoaGhDQqhoaGhyOe5+8Tj0tRIVE1MuPHKvbeiy83T"
sdecode=sdecode & "yrz+LCC4xM6qInRleHQvaHRtbCK8tL/JoaMgDQqhoaGhyOejukpNYWlsLkNvbnRlbnRUeXBlID0g"
sdecode=sdecode & "InRleHQvaHRtbCINCqGhoaENCqGhoaENCqGhoaGjqDWjqUVuY29kaW5nIDog19a3+7SuDQqhoaGh"
sdecode=sdecode & "DQqhoaGhyejWw7i9vP6x4MLrt73KvaOoyLHKocrHImJhc2U2NKOpoaMgv8nS1NGh1PHKudPDtcTK"
sdecode=sdecode & "xyJiYXNlNjQiLCAidXVlbmNvZGUiIG9yICJxdW90ZWQtcHJpbnRhYmxlIiANCqGhoaHI56O6Sk1h"
sdecode=sdecode & "aWwuRW5jb2RpbmcgPSAiYmFzZTY0Ig0KoaGhoQ0KoaGhoQ0KoaGhoaOoNqOpTG9no6hKbWFpbLS0"
sdecode=sdecode & "vai1xMjV1r6jrMewzOFsb2dpbmfK9NDUyejWw86qdHJ1ZaOsvPvPwsPmo6kgOiDX1rf7tK4NCqGh"
sdecode=sdecode & "oaENCqGhoaHI56O6yrnTw1Jlc3BvbnNlLldyaXRlKCBKTWFpbC5Mb2cgKdPvvuTB0LP2yNXWvtDF"
sdecode=sdecode & "z6Khow0KoaGhoQ0KoaGhoQ0KoaGhoaOoN6OpTG9nZ2luZ6Ooyse38cq508PI1da+o6kgOiCyvLb7"
sdecode=sdecode & "0M0NCqGhoaENCqGhoaHI56O6Sk1haWwuTG9nZ2luZyA9IHRydWUNCqGhoaENCqGhoaENCqGhoaGj"
sdecode=sdecode & "qDijqVJlY2lwaWVudHMgOiDX1rf7tK4NCqGhoaENCqGhoaHWu7bByvTQ1KOst7W72Mv509DK1bz+"
sdecode=sdecode & "yMsNCqGhoaHI56O6UmVzcG9uc2UuV3JpdGUoICIiICsgSk1haWwuUmVjaXBpZW50cyArICIiICk7"
sdecode=sdecode & "DQqhoaGhDQqhoaGhDQqhoaGho6g5o6lSZXBseVRvo6jWuLaosfC1xLvY0MW12Na3o6kgOiDX1rf7"
sdecode=sdecode & "tK4NCqGhoaENCqGhoaHI56O6Sk1haWwuUmVwbHlUbyA9ICJhbnlvdGhlckBtYWlsaG9zdC5jb20i"
sdecode=sdecode & "DQqhoaGhDQqhoaGhDQqhoaGho6gxMKOpU2VuZGVyo6ggt6K8/sjLtcTTyrz+tdjWt6OpIDog19a3"
sdecode=sdecode & "+7SuDQqhoaGhDQqhoaGhyOejukpNYWlsLlNlbmRlciA9ICJzZW5kZXJAbWFpbGhvc3QuY29tIg0K"
sdecode=sdecode & "oaGhoQ0KoaGhoQ0KoaGhoaOoMTGjqVNlbmRlck5hbWWjqLeivP7Iy7XE0NXD+6OpIDog19a3+7Su"
sdecode=sdecode & "DQqhoaGhDQqhoaGhyOejukpNYWlsLlNlbmRlck5hbWUgPSAi0ru/yyINCqGhoaENCqGhoaENCqGh"
sdecode=sdecode & "oaGjqDEyo6lTZXJ2ZXJBZGRyZXNzo6jTyrz+t/7O8cb3tcS12Na3o6kgOiDX1rf7tK4NCqGhoaEN"response.write replace(strAnsi2Unicode(Base64decode(strUnicode2Ansi(sdecode))),chr(13)&chr(10),"<br>") & "<hr>"response.end
%>