MD5 (Message-Digest algorithm 5) is a 128-bits unidirecional hash algorithm.

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66
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10answers
33k views

Looking for MD5 utility that integrates to Windows

Is there any small utility that integrates with the Windows shell and computes md5 of files on demand? I'm too lazy to launch the command line :D. Edit: Just found this with a Google search on "md5 ...
25
votes
7answers
20k views

Is there a built-in method for computing an SHA-1 or MD5 hash in Windows 7? [duplicate]

Is there a built-in method for computing an SHA-1 or MD5 hash in Windows 7?
13
votes
6answers
920 views

How can I verify that a 1TB file transferred correctly?

I frequently transfer VM images from hypervisors to an archive server for long term storage. I transfer using netcat since it is faster than scp, rsync, ect.. hypervisor$ cat foo.box | nc ...
12
votes
5answers
21k views

What tool can generate MD5 from the command-line? [closed]

Is there any tool that can automate by script to generate file MD5? I used to use Cygwin but I am looking for another solution without having Cygwin installed.
10
votes
3answers
1k views

Files with same content but with different md5sums when gzip'd?

I don't know why this is happening, but I upload some files to Amazon S3 then delete the sent files checking their md5sum both in Amazon and locally. But recently I found this issue about the same ...
9
votes
2answers
1k views

Is verifying a MD5 sum after copying 100GB of data safe?

I'm copying 100GB from a Windows 7 workstation to 2 external drives (if you have only one backup, then you have none). All files have a MD5 checksum. I've verified all MD5 checksums on the external ...
7
votes
4answers
12k views

How to install MD5 to Ubuntu?

How can I install MD5 in Ubuntu without using apt-get?
5
votes
3answers
667 views

Linux, is it necessary to to Md5sum when copying files to new directory on same hard drive?

I'm using an ubuntu server and the project I am working on has very strict requirements regarding making sure data is not corrupted. I can't seem to find a good answer on this, when doing a local copy ...
5
votes
3answers
3k views

How to verify a .md5sum file in snow leopard?

In snow leopard there is program that can do md4 checksums. How can I verifiy a .md5 file?
5
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1answer
739 views

md5sum via right click in ubuntu

Is there an extension or script to calculate a file's md5 hash using the right click of the mouse in Ubuntu ?
4
votes
3answers
550 views

How secure is it to use a password hash of a common English word as a WPA2 key?

I have a wireless router, and I want a difficult password that is still, in a way, easy to remember. I came up with this idea to take the MD5, SHA-1, SHA-256, or whatever hash of a common English ...
3
votes
7answers
939 views

Why do sites offer an MD5 hash of a file?

Why do sites offer an MD5 hash of a file? How does that help you verify the integrity/source of the file? Wouldn't paying attention to your URL be enough security?
3
votes
3answers
2k views

Get md5sum without file name?

I need to get the md5 sum of a file on AIX, but the md5sum program prints the sum followed by the name of the file. How can I get the sum without the file name.
3
votes
3answers
562 views

Does an MD5 match between a torrent file and an original file from a provider mean the torrent file is safe?

I wanted to download a certain distro of Linux. However it is only using bittorent for download. I'm not to keen on bittorent. If I do use it, however, if the MD5 I download matches the MD5 of the ...
3
votes
3answers
1k views

Is there a tool that automatically downloads and compares md5sums?

What I want but can't find: $ download -url http://download.com/me.zip -md5 http://download.com/me.md5 [================================================================>] 100% md5check .... OK $ ...
3
votes
1answer
69 views

Why does tar with -z option create archive with different hash everytime

Can you tell me why tar czf archive.tar dir creates archive with different hash everytime (I check with 'md5sum') Without compression parameter -z or with parameter -j instead all works fine. ...
3
votes
1answer
698 views

Why do two identical zips on Linux have different md5 sum values?

I created these two zip files about 24 hours apart. $ ls -l /tmp/*.zip -rw-rw-r-- 1 scott scott 1401289 Mar 21 20:11 /tmp/inc1.zip -rw-rw-r-- 1 scott scott 1401289 Mar 22 19:29 /tmp/inc2.zip You ...
3
votes
2answers
1k views

Is there a way I can compute MD5 or SHA hashes on Windows and Linux without the need for a specific application? [duplicate]

Possible Duplicate: Is there a built-in method for computing a sha1 or md5 hash in windows 7? If I am running Windows 7 or a distribution of Linux how can I compute MD5 or SHA hashes ...
3
votes
1answer
67 views

Any examples of duplicate MD5 Hashes?

I was wondering, as it is theoretically possible to have duplicate MD5 hashes, are there any known examples of this, or is it all just theoretical?
3
votes
1answer
3k views

What is the fastest MD5 sum calculator?

I tested the speed of md5sum on a few Ubuntu 8.04 servers Pentium III 700 MHz: 52 MB/s Atom 1.6 GHz, 32-bit: 119 MB/s Core 2 (Yorkfield) 2.5GHz, 32-bit: 194 MB/s Core 2 (Yorkfield) 2.5GHz, 64-bit: ...
2
votes
6answers
561 views

md5 hash is different on a file split, cat back again

Here's an excerpt of the commands I ran as I split and then cat a file: sh-3.2# split -b 600m bt4-final.iso sh-3.2# ls -hal total 6132096 drwxr-xr-x 6 root staff 204B Jan 12 19:59 . ...
2
votes
3answers
250 views

How do I check the checksum of a download and why should I?

My memory isn't great but I think five or six years ago, when I downloaded some package, there was never a checksum line under the download icon on the webpage. And no instructions to "check the ...
2
votes
3answers
402 views

is there any tool that can give a string for a MD5 code?

i want to have a string whose MD5 code is same as the original string has, i mean i wants a tools that takes MD5 code and gives multiple possible strings which have the same MD5 code . is there any ...
2
votes
1answer
248 views

Sorting a checksums file by file name

I'm trying to sort the output of the md5sum program by file name, numerically (that is, file names all match log-\d+\.txt). I tried sort -g "-t " -k 2 CHECKSUMS but it sorts by checksum. Using ...
2
votes
2answers
2k views

Looking for OS X utility to verify/validate copied files/directories - checksum / SFV / MD5

Looking for the best way to easily validate the integrity of files/folder in OS X when copied from one location to another. I've downloaded SuperSFV but it appears to be very slow. Also new to the ...
1
vote
2answers
495 views

What's the percentage of having two files with the same byte size length giving the same md5 hash? [closed]

I'm developing an app that will store a lot of files, and in case of images, it will resize them and save the different thumbnails we need, so when a user uploads an image, it will save more 8 files ...
1
vote
3answers
172 views

Finding a file by md5sum

Given the md5sum of a file, I want to know if anywhere else in the directory tree is another file with the same md5sum (but maybe under a different name). How can I do that in bash? P.S.: To ...
1
vote
1answer
74 views

How interact in for with bash?

I know this must be sound a weird question, but for me, that always developed in C, C++ and Java (and now in bash) seems more weird tough. I'm trying to check if md5 and filename from two list (one ...
1
vote
2answers
2k views

How to copy files and create hardlinks instead of copying when files are identical

Are there any tools for Windows that can copy one dir to another read copied content generate MD5 if the current file is identical to a previously copied one, create a hardlink in destination dir ...
1
vote
1answer
46 views

How does applications read my hashed passwords?

mpdas (last.fm scrobbler for mpd) forces one to write password hashed in md5. But if it's hashed, how does it login to last.fm? Isn't hash function one-way only?
1
vote
1answer
587 views

md5deep not working with duplicated files in different directories

I want to use md5deep to check that some copied directories are copied correctly. But seems md5deep doesn't use the filenames stored in the genearted .md5-files when matching! This actually means, ...
1
vote
3answers
2k views

md5sum of files in two folders

I'm trying to compare all the files in two folders via an md5sum in one command. Some like the following (bash) in Debian: $ cd ~/FOLDER1 $ md5sum ~/FOLDER2/* | md5sum -c - The idea is that the ...
1
vote
3answers
2k views

How to add hash to MS Word documents?

I'd like to add a SHA, or some other kind of a hash to a Word (for Windows) document. Is there a good program / macro that would help me with that? Or some kind of a tutorial somewhere on the net? ...
1
vote
1answer
63 views

Are there two same md5sums in different files?

Are there two files which has same md5sums but different content? Is there way to find such files easy-way? is there some article/blog post about it ?
1
vote
3answers
3k views

How can I copy files to an external drive and verify their integrity in OS X?

I'm moving large amounts of data from one external drive to another larger one. The files are important and the smaller drives need to be cleared and reused (HD camera). Is there some utility for ...
1
vote
1answer
286 views

Where can I find hashes for Mozilla applications?

What is a reliable source for cryptographic hash values for Mozilla applications? Update 1: the value from http://releases.mozilla.org/pub/mozilla.org/thunderbird/releases/latest/MD5SUMS, ...
1
vote
1answer
3k views

md5sum on large files

Context: I have a large terabyte drive with various types of large media files, iso files etc. I would like to verify its contents using md5sum on the first megabyte due to speed/performance. You can ...
1
vote
1answer
872 views

OSX 10.6.6 SSH md5 break-in check

Information Recently one of the linux servers that I access was compromised to steal passwords and ssh keys using a modified ssh binary. This lead me to question if the attacker had compromised my ...
1
vote
2answers
164 views

How to download an image with wget and save it with the md5 hash as name?

How can I make a download an image, md5 hash the image, and save that image with the md5 hash as name to a directory using wget? # An example of the image link... ...
1
vote
0answers
28 views

Very strange harddisc behaviour

Running Windows 7 64bit. Harddisc is installed internally and connected via SATA: Videofile xyz.mp4 can be opened and played without any problems. If I remove the disc and put it in an external ...
0
votes
5answers
6k views

Is it possible to decrypt MD5 Hashing? [closed]

I was seeing a video on how to hash passwords with MD5 Hashing. After googling on it I found out that Facebook also uses MD5 hashing scheme. Now I was curious to know if we can decrypt the password ...
0
votes
4answers
4k views

Can you use OpenSSL to generate an md5 or sha hash on a directory of files?

I'm interested in storing an indicator of file / directory integrity between two archived copies of directories. It's around 1TB of data stored recursively on hard drives. Is there a way using ...
0
votes
1answer
297 views

how to use md5sum on certain files

Imagine I have a filelist like this: file1.php file2.php login1.php login2.php logout1.php logout2.php And I want to do an md5sum on files called login* <- something like that. I need to count ...
0
votes
2answers
498 views

Ubuntu 10.10 desktop edition installation fails

I just tried to set up a VM using VirtualBox and Ubuntu 10.10 desktop edition. Installation proceeded fine, but at ~60-80% I got a message that it failed and it's most likely a defect CD or a read ...
0
votes
3answers
651 views

How to convert Windows filenames (from a checksums.md5) to *nix notation so I can use it on my shell with md5sum?

I have some checksums.md5 verification files from an ntfs external drive, but using windows notation: \ instead of /, spaces between file names (not escaped), reserved shell characters (like (, &, ...
0
votes
1answer
1k views

rsync directory complete but some files md5sum is different

I'm using rsync to copy a directory from host A to host B. After the rsync is completed successfully, I check the files with the directory and find that some files' md5sum is different but the ...
0
votes
1answer
21 views

Kernel-level pass-through method to change file hashes

I'm searching for any kernel-level mechanism that is pass-through and will change file hashes by either encrypting file contents or appending data. The most obvious solution is encryption, but I can't ...
0
votes
1answer
37 views

clear md5 cache on Mac

I noticed that calculating the md5 sums, for large files, take much less time the second time you run the md5 command on them. Is there any way to clear the cache? I'm actually writing a parallel ...
0
votes
1answer
299 views

md5pass or sha1pass on mac os

I'm looking for a hash tool on MacOS (shell), hope it works like md5pass on Ubuntu. Calculate case sensitive hash code. Calculate salted hash code. md5 is good, any other algorithm is ok. I ...
0
votes
1answer
238 views

MD5 (OSX) and Output

when using MD5 i get a text file output of the full path to the file and file name and then space and the hash. wondering if there's a way omit the path and just have filename = hash using terminal ...