Questions tagged [checksum]

A checksum is a value created from a binary file that can be used to validate its authenticity and integrity. An example of a checksum is MD4, MD5 and SHA-1.

Filter by
Sorted by
Tagged with
1 vote
1 answer
138 views

Windows PowerShell: Get-FileHash and long file paths

OS is Windows 10. I'm using PowerShell's "Get-FileHash" command to generate a file's MD5 checksum directly within its folder, like so: PS Z:\Test> Get-FileHash 'test.txt' -algorithm MD5 ...
user1763606's user avatar
0 votes
0 answers
23 views

I want a minimum value in a cell only if there are values entered entered

=MAX(150,SUM((D3+E3)*2)) is what I use but I don't need it to fill if values are not entered in D3 and E3
Dayton Manuel's user avatar
1 vote
1 answer
95 views

Verify data integrity of tar outputting through ssh

I am creating a backup script which uses tar, encrypts it with gpg and then sends the output through ssh to an offsite host. I am now wondering weather and how I can verify that all of the data is ...
Felix Schneider's user avatar
1 vote
1 answer
620 views

Choco error checksum didn't meet

While installing tabby using choco gives checksum didn't match error. PS C:\Users\devpa> choco install tabby -y Chocolatey v2.0.0 ...
Udesh's user avatar
  • 882
0 votes
1 answer
1k views

Zip file to verify if not modified

I want to zip source code of my application and provide it to my client. I want to somehow assign to it an id or whatever which would describe the status of zipped files in official agreement between ...
Arie's user avatar
  • 103
1 vote
0 answers
341 views

How reliable is diff?

I copied a large directory from one volume to another (using rsync) and subsequently wanted to check whether the copy was indeed correct to verify the integrity of the data. To avoid the lengthy file ...
Alex Ixeras's user avatar
1 vote
1 answer
247 views

Does it make sense to add checksums to archived data?

We want to archive some data for long term storage on optical media (M-Disks). Does it make sense to create checksums for all files beforehand and burn them alongside the data onto the M-Disks? This ...
pauel's user avatar
  • 111
2 votes
1 answer
325 views

ffmpeg framemd5 - how do you get the checksums to match between LPCM and FLAC?

I'm converting losslessly compressed video and audio files (Utvideo/LCPM) into the FFV1/FLAC codecs using MKV as a container to save on storage space without compromise in quality. I'm using ffmpeg's ...
Antonio Banderéz's user avatar
0 votes
1 answer
271 views

PowerShell script to compute partial MD4 checksums

I need a script that will read an input file and calculate MD4 checksums for each 9728000 bytes chunk, until the end of the file. I've done this previously by first extracting all 9728000 bytes chunks ...
GabrielB's user avatar
  • 855
0 votes
1 answer
1k views

My windows laptop is giving error code 0xc0000221 after I dropped it

It was a pretty gnarly fall, to be honest. When I start up my laptop I get a error screen that says: The header checksum for this file doesn't match the computed checksum. File: \WINDOWS\system32\...
Mehr459's user avatar
0 votes
0 answers
77 views

Is a file Overlay a security threat?

How do you tell if the "Overlay" found on some files when searching the hash checksum on VirusTotal poses any threat? Would the Overlay be part of the signed file? Does the VT page ...
Eric's user avatar
  • 87
3 votes
1 answer
4k views

Do lower and capital letters matter for sha checksum?

I have just download a windows iso from microsoft and the checksum does match, unless lower and capital letters must be equal. Note: i copy pasted the checksum nothing was edited. ...
Sir's user avatar
  • 31
0 votes
2 answers
507 views

How can I hash/checksum any sequential download, without having to store the whole file locally?

How can I hash/checksum any sequential download, without having to store the whole file locally? It needs to work with any kind of sequential download, so "basic HTTP download" specific ...
Hiccup's user avatar
  • 329
1 vote
1 answer
147 views

Compute checksums for a random selection of files whose names are listed in a file

Let's say I have a file named list_of_files.txt where each line corresponds to a file on the disk. For example: dir1/fileA.ext1 dir1/subdir1/fileB.ext2 fileC.ext3 dir2/fileD.ext4 fileE.ext5 I want to ...
C.J. Jackson's user avatar
0 votes
3 answers
142 views

Does a repeated download protect against file corruption?

Disclosed real issue: I use a program called youtube-dl to download and archive videos from websites like YouTube and Twitch. To verify the integrity of the downloads, I download the same video twice ...
Uri's user avatar
  • 3
0 votes
0 answers
235 views

Is downloading a media file twice and comparing their hash values enough to verify their integrity?

I often use youtube-dl to download videos. As far as I know, there is no data integrity verfication built in to youtube-dl, so what I do to verify that a video isn't corrupted in some way after ...
Uri's user avatar
  • 3
2 votes
1 answer
5k views

Does Checksum Offloading affect latency in a good way? Does it vary depending on cpu power?

I'm trying to get an understanding of the settings that you see when you go to the advanced options of a typical intel or realtek networking card in your windows device manager. A lot of those are ...
JH86's user avatar
  • 23
1 vote
1 answer
3k views

Need Checksum of a file on Onedrive/Sharepoint cloud

I need to check integrity of a file that I have uploaded using Microsoft Graph onto Onedrive/Sharepoint. Is there some checksum available via Microsoft Graph ? Regards Allan
Kedar Verma's user avatar
0 votes
1 answer
642 views

Trouble verifying md5 checksums created on Windows with Linux

Verifiying checksums inside a file usually works like this using Linux and md5sum. md5sum -c file.md5 However, using it like this on a Windows file reveals errors, that took me a long while to ...
Ocean's user avatar
  • 153
0 votes
1 answer
41 views

How to total 2 cells = Take the value in Cell A and if Cell A is blank then take the value from Cell B

Cell A Row 1 = 100 Cell B row 1= 100000 Cell C Total should be = 100 Cell A Row 2 = 0 Cell B Row 2 = 45000 Cell C Row 2 = 45000 Total of Cell C1 + C2 = 45100
user57094's user avatar
0 votes
4 answers
541 views

Are these strings the correct output to verify keys for file checksum?

I'm trying to verify the integrity of the files before installing a downloaded copy of Netbeans from the Apache.org site, per their suggestion. I'm not having luck verifying I am using the tools ...
BikerJ's user avatar
  • 3
0 votes
1 answer
740 views

Different checksum for Pop OS 20.04 iso

I'm trying to install Pop OS (no NVIDIA). I have downloaded several times and always the checksum SHA256 is different that the checksum they show in their website. The SHA256 in Pop OS website for iso ...
Suspeg's user avatar
  • 3
0 votes
1 answer
119 views

Impact of Enabling UDP Checksum (IPv4) on the System

AFAIK, UDP checksum is an optional feature on IPv4. I want to enable it on a gateway (IPv4), but I want to know if it has any negative impact on the system, e.g., increasing CPU utilization or ...
arash.amd's user avatar
2 votes
1 answer
7k views

What kind of encoding is this (sha256 variant)?

I have some config files from the program ELOG where I want to change the password manually, using something like echo -n "newpassword" | sha256sum but the value is not the expected hexa. ...
dargaud's user avatar
  • 220
1 vote
0 answers
207 views

How to checksum a SquashFS filesystem on partitionless HDD

# lsblk -f /dev/sda NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINT sda squashfs 4.0 # mount -v /dev/sda /mnt mount: /dev/sda mounted on /mnt. $ df -B1 Filesystem 1B-blocks Used ...
Darren Ng's user avatar
  • 389
3 votes
2 answers
8k views

Are 7z-included checksums enough to verify backup integrity?

I recently started using uncompressed, encrypted 7z archives for backups. I chose 7z because it has easy to use desktop apps for Windows and Linux, in case I need to recover the data quickly. I store ...
Sojaki's user avatar
  • 123
2 votes
1 answer
436 views

Different File after uploading via FTP

As the title say, when I upload a file (in my case an encrypted jar) via FTP on my server (running Ubuntu 20.04) and try to download it, some bytes of the jar seems to be changed (so also the relative ...
Princekin's user avatar
1 vote
1 answer
3k views

Enable checksum on FileZilla server

How can I enable checksum on the FileZilla server? I want to compare files after downloading on my Android device via FluentFTP library. The following checksum FTP commands are supported by this ...
Rusty Pythonic Script's user avatar
1 vote
1 answer
794 views

Enable MD5 or SHA1 hash functions in IIS

I have an IIS FTP server on my Windows 10. I am using a third party library FluentFTP to download a file. This library has a function to compare two files. And I am trying to compare my downloaded ...
Rusty Pythonic Script's user avatar
0 votes
2 answers
1k views

How to checksum files from filename on Linux

I have many files tagged with a CRC checksum on their filename on a Windows machine. Example: filename_[000000].extension I know there are a lot of options for Linux based systems to check/calculate ...
iz_been's user avatar
  • 123
2 votes
2 answers
832 views

How to verify a package after downloading from repositories

I have downloaded filezilla package using the command: # apt download filezilla So I have: # ls filezilla_3.50.0-3_amd64.deb UPDATE So I check sums: # md5sum filezilla_3.50.0-3_amd64.deb ...
M.J's user avatar
  • 125
4 votes
1 answer
3k views

Validating NPM Package Integrity

I'm being tasked to validate the integrity of my downloads from npm by our IT/Security department. I'm a programmer and while I understand at a top level what performing a sha checksum is, I'm having ...
QuantumDebris's user avatar
2 votes
2 answers
746 views

Looking for latest Blake2 b2sum.exe for Windows

I downloaded the b2sum file from blake2.net but it's from 2013 and doesn't seem to support the "compare" -c option. Several online references show several options which I cannot access with the ...
HTWingNut's user avatar
  • 499
0 votes
1 answer
2k views

Windows validate checksum

I am trying to validate the checksum for a Windows Citrix executable. The checksum that is provided is 64 char long. I have found instructions to validate a checksum by running this in PowerShell: ...
radumanolescu's user avatar
0 votes
2 answers
42 views

Upload checksums even with secure downloads?

I noticed that people tend to upload checksums even when the download is configured to use secure connection. For example, GitHub redirects all traffic to HTTPS, but the SHA sums are nevertheless ...
Midiparse's user avatar
  • 103
1 vote
0 answers
185 views

File compressor with recovery [closed]

I want to compress a lot of files with a file compressor. I've found that 7z is really good at this stuff, but the problem is that it doesn't add CRC recovery to the file to prevent corrumption in the ...
Ommadawn's user avatar
  • 111
0 votes
3 answers
910 views

Check if file exists

I have a folder with thousands (70G folder/to/check/) images that I, for each file want check if its already existing in another directory with thousands of thousands images (414G folder/to/search/). ...
Staplerz's user avatar
11 votes
7 answers
46k views

Any Built-In Checksum utility for Windows 10 using CRC-32?

Is there any Built-In Checksum utility for Windows 10 using CRC-32? I checked different answers which are old and mention certUtil, but that does not support CRC-32 or CRC-64. Update: I had also ...
Umair Malhi's user avatar
2 votes
1 answer
393 views

Checksum Fail – Fedora 29 or spin KDE Plasma

I tried checksum Fedora Workstation 29 and Fedora KDE Plasma but it's always fail. Am I doing something wrong, is the tutorial incomplete or the file in the server is corrupted? Details: I use ...
spCl's user avatar
  • 23
1 vote
1 answer
770 views

How can I get different SHA checksums for 'identical' iso files?

I have two ISO files, I call it Windows 10 ISO #1.iso Windows 10 ISO #2.iso The checksums calculated with different tools show two different values for this two *.iso files. The two textfiles show ...
PeterCo's user avatar
  • 229
2 votes
1 answer
2k views

Is two different type of format of files having same data can have same checksum value?

I am not talking from the Point of View where exploitation happens. Assuming MD5 does not has any problem. If I have 2 same format of files having same content then both checksum will be same. But, ...
P Satish Patro's user avatar
0 votes
1 answer
792 views

How can I compare a full directory's checksum between platforms?

I have a directory full of files and subdirectories on a Win7 machine. I want to archive them, so I compress and move them to archival storage. Before compression, I use the CRC context menu to ...
M. Thompson's user avatar
1 vote
1 answer
1k views

Get checksum over http or ftp

I am looking to provide a upload feature for my application that accepts a uri like http or ftp, which would be downloaded by the server and stored. I know that the files uploaded would be large (>1GB)...
greggmi's user avatar
  • 1,275
0 votes
1 answer
113 views

Different download tools result in different MP3 checksums [closed]

I wrote some code for downloading podcasts and noticed that the checksums of files I downloaded with it didn't match those of files downloaded using other methods. Initially I thought there was a bug ...
Simon Morgan's user avatar
1 vote
1 answer
5k views

how and why do "cpgz" files appear out of regular zip files?

for some reason under Mac OSX HIGH SIERRA I have noticed that once functioning .zip files are turning up with "cpgz" at the end of the file.(funny_movie.zip.cpgz) I have a feeling it has something to ...
rocknrik's user avatar
1 vote
1 answer
234 views

Is it possible to execute a command that only adds the sha256 of a file if it has been modified?

Is it possible to execute a command that adds the sha256 of a file in the previously created list and only if it has been modified according to the last date registered in that list? I do not know if ...
MarianoM's user avatar
  • 149
0 votes
2 answers
755 views

check whether (recursive) directory copy is identical

I sometimes have to copy/sync large amounts of data in a directory structure from one computer to another. Typical programs I use for this purpose are rsync, syncthing, or seafile. To not exclusively ...
A. Donda's user avatar
  • 829
-1 votes
1 answer
3k views

Compare contents of two folders by Hash to find duplicates

I have two folders containing various files. These files don't have the same filename or the same creation Date. They may be identical though as far as the actual file is concerned. I executed a ...
Phil's user avatar
  • 94
2 votes
0 answers
283 views

What are the most reliable attributes for comparing two files in order to confirm/verify they are 100% identical?

I had the following situation: I copied 5.5 TB worth of data (in total over 100,000 directories and 10 million files) from an old disk to a newly-purchased external disk. I used Ultracopier on ...
fesom's user avatar
  • 21
4 votes
1 answer
711 views

Why is this SSD returning inconsistent data, why doesn't the backup image file match the checksum?

This is about the SSD in a notebook. It appears the SSD is already going bad, possibly even corrupting data. It appears to return different data everytime it's accessed while not in use (see below for ...
basic6's user avatar
  • 2,707