Says Wrong password - but its right password only
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#401 Says Wrong password - but its right password only
I have created multiple 7zip files and it contains my fav pics. I have set same password for 5 7zip files. I am able to open only the latest zip file but not other 4 zip files. It always says wrong password. I have tried latest and Beta build as well. it does not help to open the zip files. Can you please help to open the files.
It's more likely the password for those other 4 files is indeed a different one. From my experience I know users tend to paste passwords from the clipboard, unaware of potential leading/trailing whitespaces, and then wonder why it is "different". One lesson to be learned here is: always try to read password protected data immediately after encrypting it (instead of just assuming success and just assuming it was the password that one had in mind).
To recover your password you can use "try each possible password" automations like hashcat, which supports 7-zip through its mode 11600 or other software.
Last edit: AmigoJack 2021-11-15
Thank you for the response and i would like to add more to this. I have create 4 zip files with same password (no copy paste) and for confirmation i have unzipped the files with same password and it worked fine for all 4 zip files. after 1 month when i tried to extract it failed for 3 zip files and only 1 i was able to extract but 1 file got corrupted in that zip file and that file was movie file.
Later I have seen few youtube videos and understood how to extract the password so i have used linux OS to crack it by using Hashcat itself. but the password is of 15 char length with alphanumerical char. unfortunately the system shows the estimated time for first 4 char is amount 4 months and for whole 15 char it might go in years.
I am 100% sure that I remember the password and it works for 1 zip file but not for other 3.
Is there any way to get the 7zip source code and i edit it to bypass the password validation and recompile it and extract my content. By profession i m a software architect so i can manage it. can you please give some hits as how to resolve this.
There is no "password validation" for 7z archives.
If there is decompressing error after decryption stage, 7-zip shows errors.
That's a fundamentally wrong understanding of encryption - any software which would operate in such a way would be lousy. Also the "4 months" don't mean it always takes that time - the valid password could still be found after a much shorter time. If you're a "software architect" you seem to lack essential basic knowledge. hashcat operates under multiple OSes and can be resumed, so your best bet is to let it run every now and then (i.e. when you're not at home). If extraction of your files succeeded in the past but now don't then file corruption is most likely the issue - that's a downside of both the ZIP and 7Z format: they have little to none of recovery records in contrast to i.e. RAR.
I am glad to get a response from you on this. so now if the zip file got corrupted for some reason will it say wrong password or some other error it will show? so if its saying its wrong password then i should assume that file is intact and password is wrong?
The error message "wrong password" does not exist - it is a question aimed to the reader, as in "Perhaps the password is wrong?" It is technically not possible to distinguish corrupt data from a wrong password - that's the whole sense of encryption.