Questions tagged [hashing]

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Find a string for which hash() starts with 0000 [migrated]

I've got a task from my professor and unfortunately I'm really confused. The task: Find a string D1 for which hash(D1) contains 4 first bytes equal 0. So it should look like "0000....." As I ...
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43 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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1answer
32 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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69 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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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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31 views

HMAC SHA1 value VBA

I must, with Excel file, hash a data list (Text String) with secret key (Hex String) with HMAC SHA1 algorithm, do you have some ideas ? I found this code (see below) but the secret key is not in ...
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1answer
48 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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1answer
58 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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15 views

How to convert an .lst and .txt file into a Rainbow table

I am currently testing out with responder in kali linux and when I got the NTLMv2 hash I tried cracking it using John the Ripper at first. Then I came across Rainbow crack (rcrack) and learnt that you ...
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22 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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1answer
178 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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1answer
80 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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25 views

Cant run Benchmark command in hash-cat in windows\ Ubuntu

hashcat benchmark Hash 'hashcat': Token length exception No hashes loaded I am getting this error every time I am doing benchmark. whether in ubuntu or windows10 I am running hashcat in windows ...
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1answer
143 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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1answer
44 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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1answer
51 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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39 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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15 views

What causes Robocopy to fail copying a file at 33.8%?

I was copying 50 files from my Plex Server to an external hard drive plugged to my Gaming PC via my Local Network and 1 file failed to copy at 33.8 % after a couple of tries Robocopy ignored it at 33....
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1answer
159 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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66 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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1answer
151 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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20 views

OS image unaltered? SHA512 Checksum [duplicate]

looking for some professional guidance here. I am unable to get an IOS image from the original source but the file I did get matches the SHA512 and MD5 checksums from the verified source. Is it safe ...
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1answer
186 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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24 views

How to compare Windows Passwords?

i am searching for a way to compare the Passwords of the VMs i am hosting. I thought it would be a good idea to get the SAM and the SYSTEM file and extract the Hashes. Then Compare the Hashes to the ...
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22 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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28 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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344 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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1answer
190 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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1answer
1k 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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2answers
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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126 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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619 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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341 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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1answer
1k 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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1answer
90 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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41 views

How does a “passwd” and “adduser” command actually work on a LINUX OS?

(From a novice's point of view) The other day I was thinking about how a typical "passwd" command works in a LINUX OS. For example, when we type in "passwd", a prompt appears letting us type in our ...
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1answer
1k 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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2answers
578 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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18 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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1answer
169 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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672 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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2answers
1k 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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2answers
2k views

shasum of a directory in macos

I'm writing a shell script that uses the shasum to check if the contents of a directory have changed. On Linux and FreeBSD, the shasum have the same behavior when I do shasum <directory> ...
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1answer
268 views

What is the hash for Utilman.exe

I've a Windows 8.1 machine, and have accidentally deleted Utilman.exe. I would like to know the EXACT SHA-256 hash of this version of the file. (64-bit OS, x64 processor, Windows 8.1) If there's ...
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100 views

rtorrent fails downloads over 4GB on raspberry pi

I'm running libtorrent/rtorrent master (13.7) on raspi 3b+ with raspbian. I can download torrents under 4GB in size without any problems (for example debian netinstall at around 290MB). However ...
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1answer
570 views

HUAWEI optical router password change

I have an optical router from Huawei, and I need to change my super user password. In a downloaded config file, I found this line: UserName="ADMIN_USER" Password="HASHED_PASSWORD" UserLevel="0" ...
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1answer
2k views

unzipping and re-zipping a file results in a different hash

I have an ev3 file called robot.ev3, when I ran file on it, the output I got was robot.ev3: Zip archive data, at least v2.0 to extract, I unzipped the file using unzip robot.ev3 -d robot moved into ...
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1answer
50 views

Since a copy was made, No corruption on Source drive or Target drive?

. Definition: A hash function is an algorithm that compresses messages of arbitrary length into short digests of fixed length. Would doing 3 hashes (md5, sha1, sha512) give more certainty than ...
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1answer
2k views

Where is the Windows 10 PIN stored?

I know that Windows 10 stores passwords in a NTLM hash in a SAM file. Where is the Windows 10 PIN hash stored?
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1answer
217 views

Windows 2008 R2 stand-alone: Change of hashing algorithm for user passwords

On a Windows 2008 R2 machine, which is not part of an AD-environment, the local account passwords are stored using unsalted MD4 hashes. Is it possible, to Change the hashing algorithm and enable ...