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.
155
questions
2
votes
1
answer
280
views
How can I check that files match a list of MD5 checksums on Windows 10?
I downloaded a large number of files via this magnet link (Apache 2.0 license), then moved the files around between a few devices. I now want to check the integrity of the files.
A file lists MD5 ...
1
vote
1
answer
1k
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 ...
- 23
0
votes
0
answers
24
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
1
vote
1
answer
134
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 ...
1
vote
1
answer
1k
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 ...
user1096880
0
votes
1
answer
2k
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 ...
- 103
1
vote
0
answers
571
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 ...
- 146
1
vote
1
answer
353
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 ...
- 111
2
votes
1
answer
490
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 ...
- 109
0
votes
1
answer
324
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 ...
- 875
0
votes
1
answer
2k
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\...
- 1
0
votes
0
answers
109
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 ...
- 97
3
votes
1
answer
5k
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.
...
- 31
0
votes
2
answers
658
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 ...
- 349
1
vote
1
answer
162
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 ...
- 113
0
votes
3
answers
170
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 ...
- 3
0
votes
0
answers
305
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 ...
- 3
2
votes
1
answer
7k
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 ...
- 23
2
votes
1
answer
4k
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
- 23
0
votes
1
answer
788
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 ...
- 153
0
votes
1
answer
43
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
0
votes
4
answers
615
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 ...
- 3
0
votes
1
answer
891
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 ...
- 3
0
votes
1
answer
152
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 ...
- 43
2
votes
1
answer
10k
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. ...
- 220
3
votes
2
answers
10k
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 ...
- 123
2
votes
1
answer
495
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 ...
- 21
1
vote
1
answer
4k
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 ...
1
vote
1
answer
895
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 ...
0
votes
2
answers
2k
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 ...
- 123
2
votes
2
answers
1k
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
...
- 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 ...
- 185
2
votes
2
answers
1k
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 ...
- 519
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:
...
- 187
0
votes
2
answers
43
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 ...
- 103
1
vote
0
answers
201
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 ...
- 111
0
votes
3
answers
1k
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/).
...
- 1
11
votes
7
answers
54k
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 ...
- 211
2
votes
1
answer
433
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 ...
- 23
1
vote
1
answer
854
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 ...
- 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, ...
- 167
0
votes
1
answer
907
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 ...
- 25
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)...
- 1,285
0
votes
1
answer
118
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 ...
- 138
3
votes
1
answer
6k
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 ...
- 31
1
vote
1
answer
269
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 ...
- 149
0
votes
2
answers
872
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 ...
- 849
-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 ...
- 104
2
votes
0
answers
379
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 ...
- 21
4
votes
1
answer
746
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 ...
- 2,767