There is an archive and you need to extract the contents, but the password is forgotten. You can google and trust different programs ( one , two , three ), but
The only way to crack the RAR archive is brute force.
Initial data
Archive, password dictionary (and if you put% username% into the archive, do not forget to add your frequently used ones, only locally! ).
Procedure
From previous articles:
– , 262144 SHA1, WinRAR ( AES) ( ). , CRC32, , . – , , . RAR — « ».
. WinRAR , .
Therefore, the algorithm in the first version will be simple: open the file with passwords and iterate over the passwords for the archive until it breaks.
Do not forget that we use Go .
Password file
dictFile, err := os.Open(dictionary)
if err != nil {
log.Fatalln(err)
}
defer dictFile.Close()
Archive itself
zipr, err := zip.OpenReader(zipfile)
if err != nil {
log.Fatal(err)
}
And our super algorithm
scanner := bufio.NewScanner(dictFile)
for scanner.Scan() {
pass := scanner.Text()
for _, z := range zipr.File {
z.SetPassword(pass)
_, err := z.Open()
if err == nil {
println("[+] Found password")
println("[+] Password = " + pass)
os.Exit(0)
}
}
And if the password is in the archive - voila!
Blackjack and multithreading version
There is an even more interesting version - with multithreading and goroutines.
The repository has 63 more sophisticated utilities on various topics. And if you have ideas what to add - write.
UPD
Multiple subtraction is the most reliable way to avoid mistakes. Thanks to everyone who responded.