@echo off
::::::::Base64 Encode {s11ss 2007-12-1}::::::::

::思路：
::      1.用debug的d命令获取字符串的16进制代码
::           a.计算输入的字符串的长度len（一个汉字是两个字节）
::           b.根据len，计算构造临时文件t1，里面存储debug命令d与q
::           c.构造临时文件t2，里面存储字符串，执行debug（参数为t1和t2）生成临时文件t3
::           d.读取t3的内容，获取字符串的16进制代码（分别处理代码最后一行和之前的行）
::      2.根据base64方案把16进制代码编码（参照http://baike.baidu.com/view/469071.htm）

setlocal

:getstr
echo 请输入要转换的字符串(可以有汉字)：
set/p s=
if "%s%" equ "" goto :getstr
set/a len=0,l=0

:addlen
call set "o=%%s:~%len%,1%%"
if not "%o%" equ "" (
        set/a len+=1
        if "%o%" gtr "Z" set/a l+=1
        goto :addlen
)
set/a len+=%l%

::debug应用
set/a end=0x100+%len%-1
call :10to16 %end%
pushd %tmp%
>t1 call echo d100 %%r%end%%%
>>t1 echo q
>t2 echo.%s%
type t1|debug t2>t3

::获取字符串的16进制代码
set/a n=0
set "i=%%a%%b%%c%%d%%e%%f%%g%%h%%i%%j%%k%%l%%m%%n%%o%%p"
for /f "delims=" %%a in ('more t3^|find ":"') do set/a lines+=1
set/a m=1
setlocal enabledelayedexpansion
for /f "tokens=2-17 delims=- " %%a in ('more t3^|find ":"') do (
        if !m! equ %lines% goto :lastline
        call set "hex=!hex!%i%"
        set/a m+=1
)
:lastline
set/a lines-=1
set/a remain=(%len%-16*%lines%)*2
call set remain=%%i:~0,%remain%%%
for /f "tokens=2-17 delims=- " %%a in ('more t3^|find ":"^|more +%n%') do set "hex=%hex%%remain%"

::根据base64方案把16进制代码编码
set "base64=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
:hex2base64
if not defined hex goto :print
for /l %%a in (1,1,3) do (
        set/a "n=2*(%%a-1)"
        call set x=%%hex:~!n!,2%%
        set "c%%a=0x!x!"
        if "!x!" equ "" set c%%a=0       
)
set hex=%hex:~6%
set/a ec1=%c1%">>"2
set/a ec2=%c1%"<<"4"|"%c2%">>"4
set/a ec3=%c2%"<<"2"|"%c3%">>"6
set/a ec4=%c3%
for /l %%a in (1,1,4) do set/a ec%%a=!ec%%a!"&"63
if %c2% equ 0 set ec3=64
if %c3% equ 0 set ec4=64
for /l %%a in (1,1,4) do call set "es=%%es%%%%base64:~!ec%%a!,1%%"
goto :hex2base64

:print
echo.
echo.%es%
pause
popd
goto :eof








:10to16
set "h=0123456789ABCDEF"
set/a q=%1
        :1c
        set/a r=%q%%%16
        set/a q=%q%/16
        call set r=%%h:~%r%,1%%
        call set r%1=%r%%%r%1%%
if not %q% equ 0 goto :1c

@echo off
::::::::Base64 Encode {s11ss 2007-12-1,modify zh159 2007-12-2}::::::::
setlocal
echo 请输入要转换的字符串(可以有汉字)：
set/p input=
set str=%input%

::计算字符串长度{modify zh159}
:addlen
set "str=%str:~1%"
set/a len+=1
if not "%str%" == "" goto addlen

::利用 fc/b 获取16进制代码{modify zh159}
for /l %%n in (1,1,%len%) do call set "str=%%str%%``"
>tmp.txt set/p=%str%<nul
>temp.txt set/p=%input%<nul

for /f "tokens=3" %%i in ('fc/b tmp.txt temp.txt^|findstr "0000"') do call set "hex=%%hex%%%%i"
del temp.txt
del tmp.txt

:str2hex
set "base64=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
setlocal enabledelayedexpansion
:hex2base64
if not defined hex goto :print
for /l %%a in (1,1,3) do (
        set/a "n=2*(%%a-1)"
        call set x=%%hex:~!n!,2%%
        set "c%%a=0x!x!"
        if "!x!" equ "" set c%%a=0        
)
set hex=%hex:~6%
set/a ec1=%c1%">>"2
set/a ec2=%c1%"<<"4"|"%c2%">>"4
set/a ec3=%c2%"<<"2"|"%c3%">>"6
set/a ec4=%c3%
for /l %%a in (1,1,4) do set/a ec%%a=!ec%%a!"&"63
if %c2% equ 0 set ec3=64
if %c3% equ 0 set ec4=64
for /l %%a in (1,1,4) do call set "es=%%es%%%%base64:~!ec%%a!,1%%"
goto :hex2base64
:print
echo.
echo.%es%
pause

@echo off
::::::::Base64 Encode {s11ss 2007-12-1,modify zh159 2007-12-2}::::::::
setlocal
echo 请输入要转换的字符串(可以有汉字)：
set/p input=
set str=%input%

::利用 fc/b 获取16进制代码{modify zh159}
>temp.txt set/p=%input%<nul
call :test temp.txt
::利用fsutil创建一个一样大小的文件  
fsutil file createnew tmp.txt %size% >nul 2>nul

for /f "tokens=3" %%i in ('fc/b tmp.txt temp.txt^|findstr "^0000"') do call set "hex=%%hex%%%%i"
del temp.txt
del tmp.txt

:str2hex
set "base64=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
setlocal enabledelayedexpansion
:hex2base64
if not defined hex goto :print
for /l %%a in (1,1,3) do (
        set/a "n=2*(%%a-1)"
        call set x=%%hex:~!n!,2%%
        set "c%%a=0x!x!"
        if "!x!" equ "" set c%%a=0        
)
set hex=%hex:~6%
set/a ec1=%c1%">>"2
set/a ec2=%c1%"<<"4"|"%c2%">>"4
set/a ec3=%c2%"<<"2"|"%c3%">>"6
set/a ec4=%c3%
for /l %%a in (1,1,4) do set/a ec%%a=!ec%%a!"&"63
if %c2% equ 0 set ec3=64
if %c3% equ 0 set ec4=64
for /l %%a in (1,1,4) do call set "es=%%es%%%%base64:~!ec%%a!,1%%"
goto :hex2base64
:print
echo.
echo.%es%
pause
goto :eof

:test
set "size=%~z1"
goto :eof

@echo off
::::::::Base64 Encode {s11ss 2007-12-1,modify zh159 2007-12-2}::::::::
setlocal
echo 请输入要转换的字符串(可以有汉字)：
set/p input=
set str=%input%

::利用 fc/b 获取16进制代码{modify zh159}
>temp.txt set/p=%input%<nul
for /f %%i in ("temp.txt") do set "size=%%~zi"
fsutil file createnew tmp.txt %size% >nul 2>nul
for /f "tokens=3" %%i in ('fc/b tmp.txt temp.txt^|findstr "0000"') do call set "hex=%%hex%%%%i"
del temp.txt
del tmp.txt

:str2hex
set "base64=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
setlocal enabledelayedexpansion
:hex2base64
if not defined hex goto :print
for /l %%a in (1,1,3) do (
        set/a "n=2*(%%a-1)"
        call set x=%%hex:~!n!,2%%
        set "c%%a=0x!x!"
        if "!x!" equ "" set c%%a=0        
)
set hex=%hex:~6%
set/a ec1=%c1%">>"2
set/a ec2=%c1%"<<"4"|"%c2%">>"4
set/a ec3=%c2%"<<"2"|"%c3%">>"6
set/a ec4=%c3%
for /l %%a in (1,1,4) do set/a ec%%a=!ec%%a!"&"63
if %c2% equ 0 set ec3=64
if %c3% equ 0 set ec4=64
for /l %%a in (1,1,4) do call set "es=%%es%%%%base64:~!ec%%a!,1%%"
goto :hex2base64
:print
echo.
echo.%es%
pause