Decodes a password from HeidiSQL. HeidiSQL passwords can be found in the registry. Use File -> Export Settings to dump all settings. Great for if you forget a password.

HeidiDecode.js

function heidiDecode(hex) {
    var str = '';
    var shift = parseInt(hex.substr(-1));
    hex = hex.substr(0, hex.length - 1);
    for (var i = 0; i < hex.length; i += 2)
      str += String.fromCharCode(parseInt(hex.substr(i, 2), 16) - shift);
    return str;
}
document.write(heidiDecode('755A5A585C3D8141786B3C385E3A393'));

I was in a hurry to get a password that I should have properly stored and this handy little snippet allowed me to do so without taking the time to write something similar myself.

I know have the time to come back and say "Thanks!".

Second that: Thanks!

Lifesaver! Thanks :)

love! thx!

thank you. saved me from digging into heidi's source

Thanks, bro! Saved my day!

This is brilliant. Just what I needed.

P.S. Registery location: Computer\HKEY_CURRENT_USER\SOFTWARE\HeidiSQL\Servers

Thank you!

Thanks 👍

Thanks, I fired up a console in Firefox and retrieved my password!

thanks!

Awesome, thanks!

coool. saved my day

I wrote a PHP version if you want to do this server side!
https://gist.github.com/trevorbicewebdesign/6b747ba8e00a2e9f8001

Thanks ! Here a python version :

def decode(hx):
    shift = int(hx[-1])
    l = [int(hx[i:i+2], 16) for i in range(0, len(hx), 2)]
    return ''.join(chr(v - shift) for v in l)

i try to make it more easy
just try this link
http://wendyliga.com/decoder/heidisqldecoder.html

thanks for Trevor Bice for php code

It's never late to say thank you, right? :)
You guys saved my day too.

https://github.com/Elektrik1/HeidiSQLDecode
Simple winforms aternative, fetches passwords right from registry, so no need to open/export at all. Quick and easy :)

Good god, I'm an idiot. Thanks so much for this.

Thanks, @jpatters! Here, have a PowerShell version with bonus registry lookup:

function Get-HeidiCreds {
	$profile = "user@server"
	$password = (Get-Item -Path registry::HKEY_CURRENT_USER\SOFTWARE\HeidiSQL\Servers\).OpenSubKey($profile.toString()).GetValue("Password").toString()
	$username = (Get-Item -Path registry::HKEY_CURRENT_USER\SOFTWARE\HeidiSQL\Servers\).OpenSubKey($profile.toString()).GetValue("User").toString()
	$shift = [Convert]::ToInt64($password.substring($password.toString().length-1,1))
	$password = $password.substring(0,$password.toString().length-1)
	$str = ""
	for ($i=0; $i -lt $password.length; $i += 2) {
		$val = [Convert]::ToInt64($password.substring($i,2), 16)
		$val = '{0:x1}' -f ($val - $shift)
		$val = $val | ForEach-Object {[Convert]::ToInt32($_,16)} | ForEach-Object {[Convert]::ToChar($_)}
		$str += $val
	}
	$password = $str
	return $username, $password
}

Note: You can use the same method to get credentials for SSH tunnel if configured, just choose those registry keys instead.

Thank you so much, it saved my day

PHP Decode:

php -r '$p=$argv[1];$s=substr($p,-1); echo implode(array_map(function($c)use($s){return chr($c - $s);},unpack("C*",hex2bin(substr($p,0,-1)))));' 303132333435363738390

Note that PHP's chr wraps negative numbers properly. Not all languages will do this. You may need ($c+256-$s)%256. To test for that you should see if whatever you're using for chr produces the same for 0 - s as 256 - s.

If you're encoding your own password (generating conf)...

php -r 'echo bin2hex("Sweet as a corn that'\''s not yet born."), 0;'

There's no point to bother shifting it. Shifting and hex encoding is so weak it might as well be plain text.

@wendyliga Do you have everyone's password now :D?

you are a lifesaver