asp代码改成c#
<%
' OPTION EXPLICIT //强制声明变量
const BASE_64_MAP_INIT = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/ "
dim nl
' zero based arrays //零基础数组
dim Base64EncMap()
dim Base64DecMap(127)
' must be called before using anything else //在使用前必须被别的什么吗
PUBLIC SUB initCodecs()
' init vars
nl = " <P> " & chr(13) & chr(10)
' setup base 64 //设置基地64
dim max, idx
max = len(BASE_64_MAP_INIT)
'response.Write(mid(BASE_64_MAP_INIT,idx+1,1))
' response.End()
redim Base64EncMap(max-1)
for idx =0 to max-1
' one based string
'response.Write("yy"&idx&"yy")
' 'response.End()
Base64EncMap(idx)=mid(BASE_64_MAP_INIT,idx+1,1)
next
for idx = 0 to max - 1
Base64DecMap(ASC(Base64EncMap(idx))) = idx
' response.Write(Base64EncMap(idx)&Base64EncMap(idx))
next
END SUB
' encode base 64 encoded string //编码base 64编码的字符串
PUBLIC FUNCTION base64Encode(plain)
if len(plain) = 0 then
base64Encode = " "
exit function
end if
dim ret, ndx, by3, first, second, third
by3 = (len(plain) \ 3) * 3
ndx = 1
do while ndx <= by3
first = asc(mid(plain, ndx+0, 1))
second = asc(mid(plain, ndx+1, 1))
third = asc(mid(plain, ndx+2, 1))
ret = ret & Base64EncMap( (first \ 4) AND 63 )
ret = ret & Base64EncMap( ((first * 16) AND 48) + ((second \ 16) AND 15 ) )
ret = ret & Base64EncMap( ((second * 4) AND 60) + ((third \ 64) AND 3 ) )
ret = ret & Base64EncMap( third AND 63)
ndx = ndx + 3
loop
' check for stragglers //检查掉队
if by3 < len(plain) then
first = asc(mid(plain, ndx+0, 1))
ret = ret & Base64EncMap( (first \ 4) AND 63 )
if (len(plain) MOD 3 ) = 2 then
second = asc(mid(plain, ndx+1, 1))
ret = ret & Base64EncMap( ((first * 16) AND 48) + ((second \ 16) AND 15 ) )
ret = ret & Base64EncMap( ((second * 4) AND 60) )
else
ret = ret & Base64EncMap( (first * 16) AND 48)
ret = ret & "= "
end if
ret = ret & "= "
end if
base64Encode = ret
END FUNCTION
' decode base 64 encoded string //解码base 64编码的字符串
PUBLIC FUNCTION base64Decode(scrambled)
if len(scrambled) = 0 then
base64Decode = " "
exit function
end if
' ignore padding //忽略填充
dim realLen
realLen = len(scrambled)
do while mid(scrambled, realLen, 1) = "= "
realLen = realLen - 1
loop
dim ret, ndx, by4, first, second, third, fourth
ret = " "
by4 = (realLen \ 4) * 4
ndx = 1
do while ndx <= by4
first = Base64DecMap(asc(mid(scrambled, ndx+0, 1)))
second = Base64DecMap(asc(mid(scrambled, ndx+1, 1)))
third = Base64DecMap(asc(mid(scrambled, ndx+2, 1)))
fourth = Base64DecMap(asc(mid(scrambled, ndx+3, 1)))
ret = ret & chr( ((first * 4) AND 255) + ((second \ 16) AND 3) )
ret = ret & chr( ((second * 16) AND 255) + ((third \ 4) AND 15) )
ret = ret & chr( ((third * 64) AND 255) + (fourth AND 63) )
ndx = ndx + 4
loop
' check for stragglers, will be 2 or 3 characters //检查流浪者,将2或3个字符
if ndx < realLen then
first = Base64DecMap(asc(mid(scrambled, ndx+0, 1)))
second = Base64DecMap(asc(mid(scrambled, ndx+1, 1)))
ret = ret & chr( ((first * 4) AND 255) + ((second \ 16) AND 3))
if realLen MOD 4 = 3 then
third = Base64DecMap(asc(mid(scrambled,ndx+2,1)))
ret = ret & chr( ((second * 16) AND 255) + ((third \ 4) AND 15) )
end if
end if
base64Decode = ret
END FUNCTION
' initialize
call initCodecs
'Testing code
dim inp, encode
' inp = request.QueryString( "input ")
inp="&*%@@"
encode = base64Encode(inp)
' response.write "Encoded value = " & encode & nl
'
' response.write "Decoded value = " & base64Decode(encode) & nl
%>
这是asp写的，帮忙转成c#.net的。
[解决办法]
VB改C#
[解决办法]
直接搜索百度有现成的，不用翻译
[解决办法]
是base64的函数吗？
与其修改不如到网上找个现成的，base64等通用加密算法网上多的是代码了。
