Questions tagged [hashing]

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Why does Certutil in Windows give a different hash value than Linux?

I have a sample file which is accessible by my Linux host, and my Windows 10 VM. filename: hello.txt Contents: Hello World! But checking the hash values on Linux and Windows, I get different values. ...
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15 views

clarification about the output of hashdeep audit mode

I'm trying to understand the output of hashdeep's audit mode. I performed this test (on Ubuntu, and also Windows/cygwin both hashdeep v4.4), via : create a directory "hashtest" with two ...
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0 votes
2 answers
42 views

How to use Argon2 with salt from binary file?

In the Linux program Argon2, we need to supply the salt in the command line. This limits the salt to be printable characters. How can we use a binary string as the salt? # argon2 -h Usage: argon2 [-...
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  • 481
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1 answer
51 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 ...
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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 ...
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5 votes
1 answer
449 views

How is the .sha256 file on the download page for Inkscape used as a checksum?

In Windows 10 I would like to download and install Inkscape 1.1.2, verifying the installation file first. How do you view the contents of the .sha256 file (labeled 'sig' on the Inkscape download page) ...
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  • 87
1 vote
0 answers
155 views

SHA1, SHA256 or MD5 hash of Windows 7 SP1 installation ISO [closed]

I know that Windows 7 is end-of-life, but for software testing and other reasons, I need to reinstall a Windows 7 from the original ISO. I'm specifically looking for "Windows 7 Ultimate 64-bit ...
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  • 1,636
0 votes
2 answers
105 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 ...
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  • 193
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0 answers
20 views

Is there a way to hash a directory that allows you to cancel and later resume?

Is there a way to hash a directory (e.g. like hashdeep and rhash do) that allows you to cancel and later resume where you left off?
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  • 193
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1 answer
46 views

`openssl digest | head -c 10` gives strange results

I'm using salted hashes of some memorable words as login/pass for anonymous accounts and just now I've noticed that sometimes I get no result for my method and then I've discovered that it was not ...
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1 answer
124 views

How to use scrypt or Argon for Openldap version < 2.4.5

I know that support for Argon2 was released with OpenLdap 2.4.5 according to this link https://bugs.openldap.org/show_bug.cgi?id=8575, but what if I want to use it with a previous version like 2.4.4 ...
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3 answers
79 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 ...
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0 answers
60 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 ...
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12 votes
5 answers
7k views

For websites, is your password's hash computed on the client or the server side?

I was wondering if passwords' inputs are "converted" locally on the client/web browser side or on the server side. I'm pretty sure it's on the server side, but in that case it brings a ...
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  • 141
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0 answers
89 views

Comparing Files to a list of MD5 Hashes and getting a List as Result (where i can delete, copy, cut etc. the results)

I am searching for a solution for the following situation. I have a list of Hashes in a Text File and i want to find every File in a certain folder and subfolders that matches the Hashes from the Text ...
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0 votes
1 answer
44 views

How to create verifiable unique hashes to include in any text?

Is there a way to include a unique hash along with say any post I make on reddit or any other public forum such that it can be verified by anyone to make sure that the message was posted by me. This ...
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1 vote
0 answers
346 views

Why is there a “Hash Sum mismatch” when I switch to a bridged network connection with VMWare on macOS?

I'd prefer to run my virtual machine in a bridged configuration so that it appears as another machine on my network. However, when I switch from a NATed configuration to a Bridged connection I get &...
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  • 195
-1 votes
1 answer
63 views

Cant we use md5 like hash algorithms to store big data?

i've read a paper about how hash algorithms word in general and i saw one strange thing. MD5 input length is unlimited and the output length are always the same so isn't that mean you can turn any ...
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  • 103
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1 answer
370 views

wrong hash pasted after copying on Windows 10

well i don't know how to explain it but always when i copy some hash from any hashin like base64 sha256 md5 etc even a txid of Bitcoin or Ethereum or Denarius my Windows 10 copy always paste wrong ...
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2 votes
0 answers
7 views

What can make unmounted volumes SHA512 hashes differ while mounted volumes content SHA512 hashes are identical?

I am trying to configure Raspberry Pi OS to be read-only. In theory, both / and /boot are read-only. That being said, I am experiencing a strange discrepancy and can’t figure out what is happening. I ...
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1 vote
1 answer
546 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. ...
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  • 150
0 votes
1 answer
311 views

Comparing ISO image files in Windows 10 or MacOS

I have a number of CDs and DVDs (some RW and some not). Some of these disks contain simple files (such as .txt, .doc, etc) and others contain Dell system drivers, various Windows OS's and so on. I am ...
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0 votes
0 answers
50 views

Identify the hashing algorithm

I started working on a web scraping project and wanted to generate the URLs to be able to scrape the data. In my company's website, unique URL is by converting Listing ID to hash value of length "...
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1 vote
1 answer
1k 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 ...
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1 vote
1 answer
323 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 ...
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0 votes
1 answer
610 views

MD5 Hex to Base64 String

When I generate an MD5 hash with a plain-text (password), I get: $echo -n "password" | openssl dgst -md5 -binary | openssl enc -base64 X03MO1qnZdYdgyfeuILPmQ== This works fine if I knew ...
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  • 103
1 vote
1 answer
67 views

Git History object hash recalculation

I'm trying to write a git history rewriter that I have completed Pack file Reader and Writer(also IDX file too) already. now I change a commit content and recalculate the hash of the new object and I ...
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0 votes
1 answer
336 views

OpenSSL 1.1.1f measure the speed of SHA3 series

In my Ubuntu OpenSSL 1.1.1f 31 Mar 2020 is installed. I can measure the SHA256 speed by $ openssl speed sha256 Help list the following as message digest commands Message Digest commands (see the `...
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0 votes
1 answer
125 views

customize output of command "openssl dgst -hmac"

I want to compute the HMAC of file A.txt and put it into file A_hmac.txt. I use openss library, now I have: openssl dgst -hmac "myHmacKey" -out A_hmac.txt A.txt The output, inside A_hmac....
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1 vote
1 answer
695 views

Facing trouble in Configuring Tor to hash a new password in windows 10

I have tried and read various articles over the internet about hashing a new password for Tor. My tor is installed in local disk D I used the following commands in the command prompt D:\softwares\tor\...
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0 votes
0 answers
119 views

How safe are Google's suggested passwords?

When I create a new account on any site, Google suggests a password under the option "Use suggested password". These passwords seem pretty strong but are hard to remember for a human. It ...
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1 vote
1 answer
279 views

Encrypted RSA Private KEY - What is this?

I'm new on cryptography and I have so many trouble to understand a lot of things. On my screen, I use Openssl to generate RSA private key and I use DES3 to encrypt this private key. Then I type my ...
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0 votes
1 answer
590 views

Calculate KDF (just like a hash digest) such as PBKDF2 on command line? using openssl or otherwise

OpenSSL can be used to calculate a hash of a file or given input from the shell, like this: echo -n "abc" | openssl dgst -sha256 or openssl dgst -sha256 myfile.txt Can I also calculate a KDF ...
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1 vote
0 answers
32 views

What is the hash algorithm used by Google's mod_pagespeed? [closed]

Google's mod_pagespeed for Apache server produces the following url structure by appending an hash string: ...pagespeed.jc.bFZBaW2xkN.js What is the hash algorithm used in this process?
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1 vote
1 answer
47 views

How to use b2sum in keyed mode?

Considering using Blake2 (perhaps b2sum) in conjunction to openssl dgst -sha512 -hmac $key but I don’t see an option to enable keyed mode.
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0 votes
0 answers
1k views

How can I read the contents of a crd file as plain text (i.e., recover my passwords)?

I lost all my passwords due to a dumb mistake I did yesterday. These passwords are really important. My computer has them saved under Windows credentials. However, I can't view passwords stored under ...
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1 vote
1 answer
538 views

Why do .sha256 hash files include asterisk before and after filenames?

I've seen .sha256 files for software such as: this_is_a_fake_sha256_hash_of_64_characters file_name.exe Or: this_is_a_fake_sha256_hash_of_64_characters *file_name.exe Or: ...
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3 votes
1 answer
3k views

Is the ".sha256" file format formally defined somewhere? How should it be parsed?

I see a bunch of FOSS projects which have ".sha256" files. They look something like this: dsdfdfdsffdfsdfdsfdsfdsfdsfdsfds23r2ewrefdefdsfdsgfdsgffgfkgdfgg *meow.exe ...
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4 votes
2 answers
2k views

How do I crack a double encrypted Hash

I created a hash which is encrypted like this: $What_i_made=BCrypt(MD5(Plain Text Password)) and I wonder if it can be cracked. Currently, I thought of two ways: Brute force $What_i_made to get the ...
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2 votes
2 answers
231 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 ...
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  • 409
0 votes
1 answer
796 views

Microsoft File Checksum Integrity Verifier (fciv.exe) not working/error

I'm attempting to hash every file on my C:\ drive with fciv.exe c:\ -r -md5 -xml hashes.xml The xml file does not initially exist, but after the command is entered, the xml file is created. The ...
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0 votes
1 answer
695 views

What is the OpenSSL equivalent of this given C# hashing code?

I've got C# server code which verifies a hash using the following logic. I have no control over the server code and cannot change it. string key = "xZBn34L4myg[...]cebvr7A=="; var hmacSha256 = new ...
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  • 179
0 votes
1 answer
3k views

7-Zip. h (Hash) command. Calculate hash values for files. When you use it?

I use 7-Zip. I work in Windows 10 Home 64-bit. I use command line. From 7-Zip help I know there is h (Hash) command. Calculate hash values for files. Syntax h [-scrc{Method}] [files] Supported ...
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1 vote
1 answer
94 views

change line starting with# with sed -i

I want to uncomment a line in /etc/apt/sources.list to enable canonical repo but it seems it has a problem with # character I tried -e but I can't figure out if I'm doing it correctly sed -i ' s/# ...
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2 votes
1 answer
3k views

Do Outlook Emails or Email Threads have a unique identifier hash that can be used within the search syntax?

I just had a massive issue with a younger IT guy who was trying to communicate to me how to find an email thread he was referring to. It was a waste of time. Now I understand that email should be ...
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0 votes
2 answers
914 views

Can MD5 Hash be reversible or crack?

I try this link (https://md5.gromweb.com/) to hash some keys (lets say key A) and reverse it back which MD5 not suppose to be reversible right? Somehow, this website can do it easily. So, I found it ...
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0 votes
0 answers
29 views

How can I exchange a hash password for a newer one at AIX and Linux using shell script?

We have AIX and Linux machines that we can use puppet to change password automatically. But in some cases we need to do this manually. But I decide to write a script and change the old hash with a ...
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  • 327
0 votes
1 answer
196 views

How should I structure my SHA-256 verification hash file(s) to make it the easiest for others?

I have been developing a major (to me) PHP library/framework kind of thing which I hope will power important applications of mine and maybe others in the future. I have so far not implemented any ...
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1 vote
0 answers
854 views

OpenSSL Digital Signature with ES256

I am trying to reproduce a valid signature for the JSON Web Token. I make the privat key with: openssl ecparam -genkey -name prime256v1 -noout -out private.pem also convert this from Pem to P8 with: ...
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3 votes
2 answers
3k views

get the hash of a string and eventually compare it to a hash

I want to run a one-liner to enable me to get the hash of a string and eventually compare it to a hash I can just copy at the end of the command later. I'm confident I can figure out how to do the ...
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