中国DOS联盟

The following is a piece of code. Enter the correct password 123456 to enter the password modification. Please write the one who is good at modifying their own password: 123456

@echo off
chcp 437>nul&graftabl 936>nul
echo hP1X500Pf3/f1/5++u5x>in.com
set /p password=Please enter password:<nul
for /f "tokens=*" %%i in ('in.com') do set password=%%i
del in.com
echo.
if /i "%password%"=="123456" goto 密码修改
echo Wrong password: "%password%"
echo The program will automatically exit after 3 seconds.
ping -n 3 127.0.0.1>nul
exit

:密码修改
cls
echo Please complete the modification of the 123456 password
pause

No, I can't get to the password modification page.

Just found relevant information, and the problem has been solved!

@echo off 

set /p password=请输密码:

for /f "tokens=2" %%i in (%~nx0)  do set oldpassword=%%i

if "%password%"=="%oldpassword%" goto 修改密码

cls

echo 错误密码:%password%

echo 3秒钟后程序自动退出.

ping -n 3 127.0.0.1>nul&goto :eof

:修改密码

cls

set /p pwd=请修改密码:

cls

set /p pwds=请再次确认你的密码:

cls

if not "%pwd%"=="%pwds%" echo 请返回正确输入&ping /n 2 127.1>nul&goto 修改密码

cls

echo 密码修改成功，新密码为 %pwd%

echo :: %pwd%>>%~nx0

pause&goto :eof

:: 123456

When testing, I removed the password hiding. Please the owner add it by himself.

@echo off 

set /p password=Please enter the password:

for /f "tokens=2" %%i in (%~nx0)  do set oldpassword=%%i

if "%password%"=="%oldpassword%" goto Modify password

cls

echo Wrong password:%password%

echo The program will automatically exit after 3 seconds.

ping -n 3 127.0.0.1>nul&goto :eof

:Modify password

cls

set /p pwd=Please modify the password:

cls

set /p pwds=Please confirm your password again:

cls

if not "%pwd%"=="%pwds%" echo Please return to enter correctly&ping /n 2 127.1>nul&goto Modify password

cls

echo Password modified successfully, the new password is %pwd%

echo :: %pwd%>>%~nx0

pause&goto :eof

:: 123456

ps Please the owner post your method to learn together.

Last edited by zw19750516 on 2008-4-17 at 08:11 PM ]

This is found from the forum, it feels very good!
@echo off
if exist M.RQM goto bn
rem llts in 0070303schj by q@251485609
@echo 12345678>M.RQM
:bn
@cls
@echo off
@echo.
@echo.
@echo.
@echo For the safety of user settings, this program requires an administrator to enter and operate!
@echo.
@echo.
@echo Enter T to exit
@echo.
@echo ------- * -------- * --------
@echo.
@echo Initial password: 12345678
@echo.
SET /P SY= Please enter the administrator password:
FOR /F %%I IN (M.RQM) DO SET syq=%%I
IF "%SY%" == "%syq%" GOTO kyjr
IF "%SY%" == "CK" GOTO ckmm
IF "%SY%" == "T" GOTO :eof
@cls
@echo.
@echo.
@echo.
@echo Sorry, (the password may have been changed) you are not an administrator and cannot enter and operate!
pause>nul
@goto bn
:kyjr
@cls
@echo.
SET /P SYg= Please press any key to enter the program (if you need to change the original password, please enter XGMM):
IF "%SYg%" == "XGMM" GOTO xg
IF not "%SYg%" == "XGMM" goto k
:xg
@cls
SET /P xmm= Please enter the new password:
@echo %xmm%>xmm.txt
SET /P cxmm= Please enter it again:
FOR /F %%I IN (xmm.txt) DO SET xsyq=%%I
IF "%cxmm%" == "%xsyq%" GOTO gng
@echo Password does not match!
pause
goto xg
:gng
COPY xmm.txt M.RQM
@echo Password changed successfully! Please remember this password.
pause>nul
goto bn
:ckmm
@cls
FOR /F %%I IN (M.RQM) DO SET syq=%%I
@echo %syq%
pause>nul
goto bn
:k
del xmm.txt
@cls
@echo Enter the use program
pause>nul

Originally posted by fourme2009 at 2008-4-13 14:40:
This is found from the forum, and it feels very good!
@echo off
if exist M.RQM goto bn
rem llts in 0070303schj by q@251485609
@echo 12345678>M.RQM
:bn
@cls
@echo off
@echo.
@echo.
@echo.
@echo ...

Two files are generated, one of which is a temporary xmm.txt file, and the other is an m.rqm file. Strictly speaking, it doesn't count as self-modification. And my method doesn't generate any temporary files. Please compare it yourself, the landlord.

Last edited by zw19750516 on 2008-4-13 at 03:51 PM ]

Originally posted by zw19750516 at 2008-4-13 01:13 PM:
I removed the password hiding during testing, please add it yourself, the landlord.

@echo off 

if not "%pwd%"=="%pwds%" echo Please return to correct input&ping /n 2 127.1>nul&goto Modify password

cls

echo Password modified successfully, new password is %pwd%

echo :: %pwd%>>%~nx0

pause&goto :eof

:: 123456

It is better to add an empty line before echo :: %pwd%>>%~nx0,
to avoid the new password and the old password being on the same line,
then, changing the password makes you not know what the password is yourself

For example:

echo Password modified successfully, new password is %pwd%
echo.>>%~nx0
echo :: %pwd%>>%~nx0
pause&goto :eof
:: 123456

First, echo set mima=新密码>%0.txt
Then type %0>>%0.txt
ren %0.txt %0

Modifying the batch file's own password is not the best strategy. Because if there is an error, your batch will be broken.

Originally posted by ZJHJ at 2009-8-8 12:07 AM:
Modifying the password of the batch file itself is not the best strategy. Because once there is an error, your batch will crash.

I agree with the gentleman. o(∩_∩)o...

Come on, what I want is that P runs once and then deletes itself. Thanks to everyone above.