Questions tagged [hashing]
The hashing tag has no usage guidance.
-1
votes
1answer
18 views
Why is your username AND password not hashed and salted?
Since common responses from Username and/or Password failure at logging is ALWAYS returned "Your Username OR Password are incorrect" due to increased security then why would systems not store the ...
0
votes
2answers
25 views
What is causing these two apparently identical files to have different hashes?
I am unable to figure out why the following two files are yielding different hashes (SHA1, CRC32, SHA384, whatever):
https://cdn.jsdelivr.net/npm/jsonify-error@1.2.1/dist/jsonify-error.js
https://...
1
vote
0answers
79 views
John the Ripper not fully using CPU
I'm using John the Ripper to crack an old ZIP archive encrypted with PKZIP, and although I've set the thread count to match the number of cores I have (4) only about 50-60% of my CPUs are being used ...
4
votes
1answer
528 views
How can I generate an MD5 sum for a folder on Windows?
There are several posts about generating MD5 sums for files and/or folders on various Windows platforms. However, none of these worked for me. I tried:
Windows CertUtil: CertUtil -hashfile myFileName ...
1
vote
1answer
405 views
How to take sha256sum of file and compare to check in one line?
I keep on finding myself wanting to download and check the integrity of the download immediately in a script, but I haven't been able to find the right incantation of sha256sum.
MY_SHA256=...
0
votes
0answers
64 views
Override El Capitan Hash Algorithm to read High Sierra DMG image?
My Mac OS was corrupted, so in recovery mode I made a backup of my data files while @High Sierra (10.13.3). Unbeknownst to me, this created a DMG file that can only be opened in High Sierra. I ...
0
votes
0answers
545 views
John the Ripper Old Hash Format
TL;DR :
John the Ripper does not try to crack hashes in an old format ($pdf$1*2*40*4294967292*1*16*...*). How to crack them?
Long version:
I have a few password-protected PDFs from years ago. ...
0
votes
0answers
14 views
Can I calculate a git tag hash from the source tree?
Given a git project, I can checkout to the tree at a tag. This tag has a hash associated with it. How is this hash calculated? Can I hash the source tree in some way to get this hash?
0
votes
1answer
37 views
Cannot open System File in Windows 10
I recently am trying to find my windows password after seeing some anti-virus software asked for my Windows credentials for me to log into my computer. So I thought I might be able to reach my own ...
0
votes
0answers
83 views
Windows 7 installer incorrect SHA-1 after copying .iso file
I have a Windows 7 Installer (x64, ultimate, SP1, u) on my NAS. I checked its SHA-1, and it was correct (starting with 36ae60de). I copied this .iso file to my pendrive (SanDisk Extreme with very high ...
0
votes
0answers
12 views
How to verify Etags on a Mac with chrome
Google provides Etags with the
https://chromedriver.storage.googleapis.com/index.html?path=2.33/
of the format
[DIR] chromedriver_linux32.zip 2017-10-05 04:18:47 3.92MB
...
4
votes
1answer
188 views
What might be the source/logic behind the hash values used by “Unified Logging” system on macOS?
This question was inspired by another question and answer thread regarding false-positives on a Mac for an—apparently—PC only virus/malware.
My answer there posits that the hash ...
0
votes
1answer
92 views
Verifying dd-wrt checksum (old docs out of date)
Trying to install dd-wrt firmware on TP Link Archer C9 v1 (AC1900) router. Want to verify the integrity of my download, but can't find any hashes or checksums. Docs on the wiki about how to verify ...
0
votes
1answer
149 views
What algorithm is used to produce the 32 bit password key in an edit protected microsoft office (specifically word) document?
If you save a legacy (.doc era) word document with edit protection, you can find the password key stored within the file.
For ease, this can be found by saving to an .xml or .html file and inspecting ...
0
votes
0answers
62 views
Can md5 hashing function be changed on cpanel PhpMyAdmin for wordpress websites?
Md5 is the default hashing function that WordPress uses. In fairness to WordPress, they combine MD5 with a salt.
Unfortunately, MD5 + salting is also broken and this has been known for a long time.
...
1
vote
3answers
5k views
How to generate MD5 hash value for multiple files in a folder using cmd
As mentioned in this page,
the command:CertUtil -hashfile yourFileName MD5can be used
to obtain the MD5 hash value for a particular file.
How can I find the MD5 hash values for multiple files in a ...
0
votes
0answers
54 views
Why does x64 process' PE have the same code section on every execution (.text) but x86 don't?
I'm experimenting with similarity preserving hashes, ssdeep more specifically. I made a script to get hashes from process' PE on several executions. I was checking the results when I observed that the ...
1
vote
1answer
83 views
How to get rid of STDIN string while using the following function in PowerShell and two other things?
I am working on Windows 8.1 Pro with PowerShell 5.0.
Let's say I want to get a pure SHA-256 hash string of a file.
I defined a following function:
function sha256sum([string]$arg) {
Get-...
1
vote
1answer
117 views
How do I check I copied a bunch of files and folders correctly from an MTP device?
That. Windows 10 Home, Android 7.1.2 device. I want to check if it copied right, as it's a backup.
1
vote
1answer
256 views
Find duplicate hashes
I have a bunch of files (4800 files), that I believe contain many duplicates and triples. Problem is that they don't also have the same names. I already weeded out the easy ones with same names. The ...
0
votes
3answers
167 views
How does Virustotal compute the hash?
When you select a file on your computer to be uploaded and analyzed by Virustotal it first computes the hash of the file to see if it hasn't already been scanned. How does the hash computation happen -...
0
votes
1answer
352 views
Create a 6 digit “hash” from a file
I need a tool to generate a 6-digit "hash" from a file. Naturally, identical files should always create the same hash. What is a good way to do this?
This is required on a vanilla debian system.
I ...
0
votes
2answers
161 views
If I generate a hash for a file stored on a network share, is the entire file sent over the wire? If not why?
Scenario: I would like to generate a hash of a file stored on a remote server. For this example lets say we are using windows file sharing for both the client and the server. I, as the client, locate ...
1
vote
1answer
585 views
Windows 10 ISO genuinity
I have downloaded Windows 10 and computed the hashes. But I could not find a place including all possible genuine hashes, so I can make sure the ISO is genuine. How can I find if it is indeed genuine?
...
0
votes
0answers
42 views
Libreoffice download unexpectedly large with non-matching hashes
Today I downloaded LibreOffice MSI for windows x86_64 and the download was taking quite long (about 1 or 2 minutes.) The website said that it was 5.1MB but chrome reported 223MB. Windows explorer ...
0
votes
1answer
529 views
Why does my md5sum hash not match other md5s?
So for a school assignment we are working with hashes. However I've encountered a problem where my file.txt containing:
test hashes
test hashes
without quotes doesn't match the hash from HashCalc (...
0
votes
1answer
192 views
What hash type is used by DISM / SFC?
What hash type is represented below?
Example 1: 0h+p0j3/Y9s1ly0mqtU741bzLjqz12mDQGKtVScMeKg=
Example 2: uNryI5MYSV5U5O1NuFPGYexSxm2nLFrRXVqga+nQjw4=
These hashes came from the CBS.log file after ...
5
votes
2answers
5k views
Safe way to verify that a Microsoft ISO has not been tampered with
I'd like to make sure an ISO (disc image) I have for a Microsoft Windows 10 OS is genuine. The way I usually do this with any file is by computing a hash of the file and comparing the result to the ...
0
votes
0answers
102 views
why file hash not match after download windows kb3185330 monthly quality rollup?
After downloading the kb3185330 monthly quality rollup for Windows 7 x64 from Microsoft site, I compared the hashes for the downloaded file named : (Windows6.1-KB3185330-x64.msu) from the site and ...
7
votes
6answers
3k views
How to create md5 hash via Arch Linux commandline?
In Arch Linux, how can I create a single md5 hash for a password using the command line? Of course, I am aware that there are secure password hashing algorithms available, which md5 is not, but this ...
2
votes
1answer
387 views
Which checksum-generating command line programs are native to macOS?
[Migrated question from stackoverflow here, because they said it was off-topic.]
I'm looking for a list/an overview of the command-line programs native to macOS that let you calculate checksums.
I ...
0
votes
1answer
209 views
Check MD5 of a file header hosted on a webserver
I am writing a bash script to periodically download a setup file using cURL.
The problem is the following, the file is around 110 MB and always have the same filename.
I can download the file, check ...
-1
votes
2answers
90 views
Is there a tool like diff -r that compares a directory tree against a manifest file using hashes?
Here's my situation. I have two cold-storage archive volumes that (should) contain identical sets of data. These volumes contain infrequently accessed backups. I am concerned that, eventually, bitrot ...
0
votes
0answers
821 views
John the Ripper error Crash recovery file is locked
I am on Windows 10 using CygWin, and I have just downloaded John The Ripper Jumbo 1.7.9. I was following the tutorial at Ethical Hacking Central to try to learn how to use the program. I created the ...
0
votes
0answers
471 views
Windows 10 Image (WIM) validation
Years ago one could use ghost to image a drive and then hash the result. When the image was restored, the new drive could also be hashed to validate the integrity of the image. Is there any similar ...
3
votes
1answer
2k views
Set a password to a pre-hashed value in mysql
How can I set a mysql user's password using a pre-hashed password?
=====
I've got a mysql database version 5.1.73 .
According to the mysql documentation, in the newer versions of mysql, creating a ...
1
vote
1answer
20 views
Rebuilding a raid 1+0 (10) system
We have a set of 8 disks that are raided together with RAID 10. Our software that rebuilds RAIDS do not allow a RAID 10 but does have a RAID 1 or a RAID 0. In theory, we wanted to drop the mirrored ...
1
vote
2answers
1k views
calculate checksum of every file that is being written to HDD
Is it possible to automatically calculate checksum of every file that is being written to HDD? My OS is Linux. I've read that btrfs stores some kind of checksums for files. Would be possible to dump ...
1
vote
2answers
971 views
Getting Linux hashes from shadow file
I have an Ubuntu 12.04 VirtualBox machine in which some days ago I changed the password. Now when I used the machine again I've forgotten the password and can't get root access.
I tried to get hashes ...
0
votes
1answer
472 views
Unable to download a file completely
Hello I've been trying to download kali-linux-2.0-amd64.iso 3 times.
When I tried it 1st time the file had about 2.6 GB, the hashes didn't coincide. 2nd time the file had 2.5 GB, the hashes didn't ...
0
votes
1answer
2k views
How to verify two copied files are exactly the same in Windows?
I’m doing a backup on my Samsung rv420 running Windows 7 Home Starter Edition.
In order to do it, I want to ensure that when making a copy from my computer to a external device, the files being ...
3
votes
2answers
897 views
How to create a SHA256SUMS file?
I can check the content of several files in a directory against checksums contained in a file named for example SHA256SUMS with
sha256sum -c SHA256SUMS.
Is there an easy way to generate a SHA256SUMS ...
1
vote
2answers
1k views
How to recursively create a hash file (sha512sum) inside each folder of a tree?
For a given tree, say /var/ftpd, how do I create a hash file in each folder of that tree with the contents of that folder within a given tree? sha1sum and sha512sum does not have recursion options.
1
vote
1answer
619 views
add hash to a file using command line
I am writing a Windows batch file to copy a file from my computer to a network location, but before doing this, I need to add a hash for it using the command line. Assuming that my file is named ...
0
votes
1answer
81 views
Alternative of arch_fast_hash in Linux kernel v3.19 and above
To find the hash value of a given buffer, I used arch_fast_hash function present in Linux kernel v3.16 declared in include/linux/hash.h and defined in linux/lib/hash.c.
But in Linux kernel v3.19, ...
1
vote
3answers
274 views
Should I use an SSD or HDD to hash lots of data?
Purely in terms of drive life which will be better for hashing hundreds of thousands of files - SSD or HDD?
Background - My HDD has files which I want to hash and compare with data in a spreadsheet, ...
32
votes
8answers
10k views
Can a file be maliciously changed in a way that maintains its original SHA-1 Hash?
According to this article, and many others, SHA-1 is not secure.
In my case, I am not concerned about passwords or digital certificates. I am concerned about file integrity.
Is it reasonably ...
2
votes
1answer
304 views
openSSL: How to specify the signature hash algorithms I will accept?
Using openSSL, on a TLS client, I specified a unique cipher suite with SSL_CTX_set_cipher_list().
When I use wireshark to look at the messages, I see in the Client Hello message, the cipher suites ...
2
votes
2answers
727 views
Why does cygwin sha512 create different checksums depending on terminal?
I'm using Windows 7 and have both Cygwin and the ming-based Git command line tool.
When I issue the command:
c:\>echo -n hello | e:\cygwin\bin\sha512sum
from the Windows cmd, it generates
...
2
votes
3answers
4k views
Recursive command-line md5 generator and verifier
I want to write a batch script that has the ability to generate and verify md5 hashes of an entire directory tree. Is there any program like this for windows?
I can find many md5 programs, but they ...
