Lenovo ideapad 500s bios locked dump

[ameego]

Hi all,

lenovo ideapad 500s asking for bios password. Any solutions please? Where can i find dump for this model?

Thanks in advance

[imranromi]

Re: Lenovo ideapad 500s bios locked dump

Hi all,

lenovo ideapad 500s asking for bios password. Any solutions please? Where can i find dump for this model?

Thanks in advance

Post here old lock bios.

[Af19]

Re: Lenovo ideapad 500s bios locked dump

hi pll

i need bios for this model 

[selek3]

Re: Lenovo ideapad 500s bios locked dump

Post here old lock bios.

Bios is with password
can someone help me

[BootLoader1]

Re: Lenovo ideapad 500s bios locked dump

Bios is with password
can someone help me

Try this password :

- Admin Password : sezfe

[selek3]

Re: Lenovo ideapad 500s bios locked dump

Try this password :

- Admin Password : sezfe

that was quick
Thank you very much, it works


can you tell us how you read it out

[onizzbox]

Re: Lenovo ideapad 500s bios locked dump

that was quick
Thank you very much, it works


can you tell us how you read it out

@selek3
Don't waste your time with this... Just a security bug developed by some manufacturers. Few models offer the possibility to extract the password without encryption.

[SMDFlea]

Re: Lenovo ideapad 500s bios locked dump

Scancode 1F 12 2C 21 12

[Maxpower3]

Re: Lenovo ideapad 500s bios locked dump

can you tell us how you read it out

Scancode 1F 12 2C 21 12

05 1F 12 2C 21 12 6B

And checksum is last byte

6B = FF - somme of bytes - numbers caracteres +1

or 6B= FF - somme of bytes - (05)first byte + 1

i think it's good, need to compare on other to be sure and know first byte

[onizzbox]

Re: Lenovo ideapad 500s bios locked dump

05 1F 12 2C 21 12 6B

And checksum is last byte

6B = FF - somme of bytes - numbers caracteres +1

or 6B= FF - somme of bytes - (05)first byte + 1

i think it's good, need to compare on other to be sure and know first byte

@Maxpower3

def hash_decrypt(hex_str):
hash_str = []
password = ''
for i in range(0, len(hex_str), 2):
hash_str.append(int(hex_str[i: i + 2], 16))
chk_hash = sum(hash_str) % 256
if chk_hash != 0:
return None

for x in range(hash_str[0]):
w = hash_str[x + 1]
if w in keyboardDict:
password += keyboardDict[w]
else:
return None
return password

[Maxpower3]

Re: Lenovo ideapad 500s bios locked dump

@Maxpower3

def hash_decrypt(hex_str):
hash_str = []
password = ''
for i in range(0, len(hex_str), 2):
hash_str.append(int(hex_str[i: i + 2], 16))
chk_hash = sum(hash_str) % 256
if chk_hash != 0:
return None

for x in range(hash_str[0]):
w = hash_str[x + 1]
if w in keyboardDict:
password += keyboardDict[w]
else:
return None
return password

ok nice thanks

[selek3]

Re: Lenovo ideapad 500s bios locked dump

all right. I did not understand anything. Here you need Python knowledge to do something yourself

[onizzbox]

Re: Lenovo ideapad 500s bios locked dump

ok nice thanks

@Maxpower3
The checksum calculation is very simple...
Just add all the digits of the string to get the value.

a.g.
Password : mikrovr
Hex string: 07 32 17 25 13 18 2F 13 1E
first digit: 07 => 07 password length
last digit: 1E => 256 checksum

07 + 32 + 17 + 25 + 13 + 18 + 2F + 13 + 1E = 256
The checksum may vary depending on the password;
2, 4, 8, 16, 32, 64, 128, 256, 512, 1024 etc.

[Maxpower3]

Re: Lenovo ideapad 500s bios locked dump

@Maxpower3
The checksum calculation is very simple...

05 1F 12 2C 21 12 6B


6B = FF - somme of bytes - numbers caracteres +1

or 6B= FF - somme of bytes - (05)first byte + 1

6B= FF+1 (256) - sum of hash

@onizzbox
I wanted to make it more complicated
and didn't understand that I was right with first byte
and my first reasoning was good.