creating a random password in batch
I am trying to create a random password using batch.
I googled and found a method but it involves setlocal delayed exapansion and all which is affecting my existing code (with special characters and stuff)
This is the code I got:
@Echo Off
Setlocal EnableDelayedExpansion
Set _RNDLength=8
Set _Alphanumeric=ABCDEFGHIJKL
Set _Str=%_Alphanumeric%987654
:_LenLoop
IF NOT "%_Str:~18%"=="" SET _Str=%_Str:~9%& SET /A _Len+=9& GOTO :_LenLoop
SET _tmp=%_Str:~9,1%
SET /A _Len=_Len+_tmp
Set _count=0
SET _RndAlphaNum=
:_loop
Set /a _count+=1
SET _RND=%Random%
Set /A _RND=_RND%%%_Len%
SET _RndAlphaNum=!_RndAlphaNum
If !_count! lss %_RNDLength% goto _loop
Echo Random string is !_RndAlphaNum!
However I dont know how to store the result into a variable in say x so that I can get it as %x%
Like x=!_RndAlphaNum!
echo %x% can show me the random number generated.
unrelated question:
Is there a way to generate a random alpha-num string without using setlocal enabledelayedexpansion.
I googled and found a method but it involves setlocal delayed exapansion and all which is affecting my existing code (with special characters and stuff)
This is the code I got:
@Echo Off
Setlocal EnableDelayedExpansion
Set _RNDLength=8
Set _Alphanumeric=ABCDEFGHIJKL
Set _Str=%_Alphanumeric%987654
:_LenLoop
IF NOT "%_Str:~18%"=="" SET _Str=%_Str:~9%& SET /A _Len+=9& GOTO :_LenLoop
SET _tmp=%_Str:~9,1%
SET /A _Len=_Len+_tmp
Set _count=0
SET _RndAlphaNum=
:_loop
Set /a _count+=1
SET _RND=%Random%
Set /A _RND=_RND%%%_Len%
SET _RndAlphaNum=!_RndAlphaNum
If !_count! lss %_RNDLength% goto _loop
Echo Random string is !_RndAlphaNum!
However I dont know how to store the result into a variable in say x so that I can get it as %x%
Like x=!_RndAlphaNum!
echo %x% can show me the random number generated.
unrelated question:
Is there a way to generate a random alpha-num string without using setlocal enabledelayedexpansion.
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I'd say you have to use enabledelayedexpansion for the random password.
But if you don' t like it issue a
Setlocal DisableDelayedExpansion
after generating the password
And you can use the original password variable without assigning it to another variable
Setlocal DisableDelayedExpansion
ECHO %_RndAlphaNum%
But if you don' t like it issue a
Setlocal DisableDelayedExpansion
after generating the password
And you can use the original password variable without assigning it to another variable
Setlocal DisableDelayedExpansion
ECHO %_RndAlphaNum%
The above recommendation does not persist outside of the batch file. Each setlocal starts a new set of (changed) variables, and changes will be reverted after endlocal or batch end.
One of the ways to allow for keeping results it by "exporting":
One of the ways to allow for keeping results it by "exporting":
endlocal & set _RndAlphaNum=%_RndAlphaNum%
If you could use a few lines of VBScript embedded in your batch file try this. Put any characters you want to use in the choice="" line and change for I=1 to 8 to a different number if you want longer.
Steve
Steve
@echo off
(echo choice="ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890abcdefghijklmnopqrstuvwxyz"
echo password=""
echo Randomize
echo for i=1 to 8: password=password ^& mid^(choice,int^(rnd*len^(choice^)^)+1,1^) : next
echo wscript.echo password
) > "%temp%\make_password.vbs"
:start
set password=
for /f %%a in ('cscript //nologo "%temp%\make_password.vbs"') do set password=%%a
echo Password this time is: %password%
pause
goto start
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