MD5 hash comparison via SMB SLOW

I am writing a script for a full power solution in Powershell for Hyper-V VMs and I have encountered the problem that calculating the MD5 hash over the network on a deployed network drive over a WAN is about half the speed of copying the file even the WAN connection. I tried to refer certutil.exe from the operating system to the file over the share, and it is very slow. I also tried Get-FileHash in Powershell with similar results. I have hundreds of 250-MB files and could not find a more efficient way to do that without invoking a remote shell to run the command. Is there a better approach?

Command Line – How to get a list of file paths md5 contained in a file?

I have a folder with many folders containing many files. Thousands.

I can Find . Type f> ./FILE.TXT To create a file with many thousand file paths, look like this:

./Anders/Letters/20190101 Rent.pdf
./Anders/Letters/20190103 Appeal.pdf
./Anders/Letters/20190107 Decision.pdf
./Beeker/Letters/20180101 Rent.pdf

How would I feed this list of file paths md5 To create an output with the following format:

9cf14e4d666dcb6aab17763b02429a19 ./Anders/Letters/20190101 Rent.pdf
d1bb70baa31f1df69628c00632b65ab ./Anders/Letters/20190103 Appeal.pdf
7a0f5bc18688fe8ba32f43aa6ec53fb1 ./Anders/Letters/20190107 Decision.pdf
a0c96a79cf3b1847025d9f073151519d ./Beeker/Letters/20180101 Rent.pdf

NB: I want the MD5 hashes of the referenced files, not the MD5 hashes of the file list, nor the MD5 hashes of the strings in the file listing.txt.

Would it be quicker to do everything in a single command line or in two passes (Find to then create file-listing.txt md5 do I create the file-listing-md5.txt)?

Create a file with MD5 hashes for all files in a directory in PowerShell

I've tried to write the MD5 hashes to a file for all the files in a directory and its subdirectories. Ideally, the output of the Unix command is replicated Find . -type f -exec md5sum {} + (that is, two columns: hashes in lowercase and relative file paths [with forward slashes] separated by a space and only completed by a line break).

With the great help of Mark Wragg, LotPings, and others on stackoverflow, the following command seems to calculate md5 hashes for all files in a directory and its subdirectories (including files without file extensions and square-bracketed files in file names).

(Get-FileHash -Algorithm MD5 -LiteralPath (Get-ChildItem -Recurse -File) .Fullname | ForEach-Object {"{0} {1}" -f $ _. Hash.ToLower (), (Resolve-Path -LiteralPath $ _. Path -Relative)} | Out-String) -replace & # 39;  r (? =  N) & # 39; -replace & # 39 ;, & # 39; / & # 39; | Set-Content -NoNewline -Encoding ascii $ ENV: USERPROFILE  Desktop  hashes.txt

The two uses of -LiteralPath seems to help with filenames with square brackets and (Get-ChildItem -Recurse -file) .fullname Gets the full path of all nested files, including files without file extensions. The rest is just the formatting.

Can someone tell me where to find more information .Full name? I tried searching for it on Google, but luckily.

I had used Get-ChildItem "*. *" -Recursethat specifies full file paths, but only for files with dots in the file name. Whereas, Get-ChildItem "*" -Recurse For some reason, it does not always return the full path (and return both files and folders). Compare:

Get-ChildItem "*. *" -Recurse | foreach-object {"$ _"}

Get-ChildItem "*" -Recurse | foreach-object {"$ _"}

However, the order of the entries in the hash file does not match that of the Unix command Compare item PowerShell seems to ignore the order of the lines; (Https://

Comparison object (get-content oldHashes.txt) (get-content newHashes.txt)


diff (cat oldHashes.txt) (cat newHashes.txt)

Hash Generator md5, md4 & much more for $ 1

Hash generator [md5, md4 & much more]

ON cryptographic hash function is an algorithm that can be run on data such as a single file or password to produce a value called a checksum.
Some commonly used cryptographic hash functions include MD5 and SHA-1

Can generate a hash for you in multiple formats. All I need is your text.

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Pass the algorithm hasd md5 from C # to php

I have the following MD5 hash algorithm in C #:

static string calculaMD5 (string string)
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider ();
byte[] bytValue = md5.ComputeHash (Encoding.Default.GetBytes (string));
StringBuilder sBuilder = new StringBuilder ();
for (int i = 0; i <bytValue.Length; i ++)
sBuilder.Append (bytValue[i].ToString ("x2"));
return sBuilder.ToString (). ToUpper ();


And I have to pass it to PHP and I've tried the following:

But it does not give me the same string and the output of the function php md5 does not give me the string with the 2nd parameter false.
Maybe I have to do it cyclically as in the C # algorithm, but what the md5 function returns is not an array like in C #, so I do not know how to reproduce the algorithm in PHP. Can someone help me with this? You're welcome

2 rr

BlackHatKings: Crypto speculation and investment
Posted by: MervinROX
Post Time: June 20, 2019 at 18:32.

Brute Force – Modify MD5 hash

I've read a lot about why md5, sha1, and many other hashing functions are uncertain, but I'm thinking about following a different approach.

I'm not aware that this does not increase security, but I think it can be very difficult to crack the hash.

Suppose I have some information that we will use, for example hell world Use MD5 hashing and get 128-bit hash fc5e038d38a57032085441e7fe7010b0,

Now I'm thinking about faking it to look like it's SHA1, 160-bit hash,
could append bits to the beginning / end, and much better in between with more rigid / or logic based logic.

So our output hash would look like this fc5e038d38a57032fafe46a9085441e7fe7010b0,

that is actually so educated fc5e038d38a57032fafe46a9085441e7fe7010b0

I split the original hash directly into the middle and something (random) & # 39; fluff & # 39; inserted in the middle.

Would this make it harder to crack hashes, since that would confuse the attacker (assuming he can not say it's a cover)?

Attacking an update mechanism with MD5 and RSA

I am currently working on a software challenge that requires you to unlock several features of a software. The software is written in Java. One of them is the update mechanism of the firmware. All you have to do is download a file from a web server and perform some checks before updating. I need to find a way to overcome these checks so I can update the firmware using my own firmware update.

How the update mechanism works:

  1. The software downloads a file from the web server. It is a ZIP file that should have the following structure:

    | Contents of the zip file | Security Tag: | Day |
    • Contents of the zip-file: Here I have to add a file version.txt it must contain a number x> 1.0, (The software reads this part as ZipInputStream.)
    • SecurityTag: This is a string that must be in this file! I can not change that.
    • Day: The day used during the exam.
  2. It takes the contents of the zip file and checks if version.txt File is included and extracts the number from it.

  3. It hashes the contents of the zip file Hash = MD5 (contents of the ZIP file)

  4. Take the tag and decrypt it with RSA: t = (day) ^ e mod N, I know e and N,

  5. It will check if hash == t

Somehow I have to pass this exam, but I do not know how. I began to investigate various types of attacks, but none of them seemed appropriate to overcome this control.

Is there an attack scenario that I miss here? Can someone show me the right direction?

magento2 – Authorizing Net MD5 on SHA512 patch does not work

Currently we have a Magento shop in Magento version 2.2.5 and use Authorize net as the default payment method. Due to the last update of Authorize net I have tried to update the patch. I followed this link

After applying this patch to my current installation, I get the following error message when I try to run the setup: di: compile

The class Magento Sales Api PaymentFailuresInterface does not exist in

I have confirmed that it is because of this new patch by returning to the old state. Any suggestions?

thank you in advance