I see this a lot here lately. What exactly is it and what do you use it for?
Very basically MD5 gives a value of the file it is referencing. If you see a file with a MD5 sum next to it you can download that file and check its MD5 sum to ensure the file downloaded properly. There are different programs for it.
Certain Odin and other files will be signed, for lack of a better word, with a MD5 sum. When Odin runs it checks for that signature and if found it runs a MD5 sum check. If the signature and check don't match Odin will fail.
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Thanks for the clarification.
Related
How do I calculate the md5 sum before I go flashing something so I can check
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It depends on how you want to check it.
The pinned root guide in the dev section includes instructions for using busybox to check md5s prior to flashing.
md5sum is included in most *nix platforms but most Win users use 3rd party apps.
md5summer, md5deep, etc
References:
http://en.wikipedia.org/wiki/Md5sum
http://en.wikipedia.org/wiki/Md5deep
http://sourceforge.net/projects/md5summer/
I always check them on the device through terminal. You need busybox to do it and know where it is. It's usually in /system/xbin/. That would make your command as follows:
/system/xbin/busybox md5sum /sdcard/pg05img.zip
That is assuming the sdcard is where your file is, and pg05img.zip is the file name to be checked.
Appreciate the help guys I have an application that I use on my PC but I'm on the road right now
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I just got an app from the market. Works fine.
What's that app called? I refuse to flash radios without verifying md5
Sent from my tbolt running das bamf 3.0
There's no need for an app to do it. Like loonatik and I said, the function is included in busybox.
Open terminal and type what loonatik said above:
"busybox md5sum /sdcard/PG05IMG.zip"
or "/system/xbin/busybox md5sum /sdcard/PG05IMG.zip" if for some reason the other has a problem.
But if you need an app there are a few such as https://market.android.com/details?id=burrows.apps.crypto or https://market.android.com/details?id=com.hobbyone.HashDroid&feature=related_apps
I use AFV (ANDROID FILE VERIFIER) from the market...and its free
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sporty377 said:
I use AFV (ANDROID FILE VERIFIER) from the market...and its free
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Same here. You can even copy and paste the known md5 into the settings for automatic comparison of the next file calculated. Makes it super easy.
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sorry my english not good how can i check my galaxy note 2 checksum my orignal rom
jann_ali said:
sorry my english not good how can i check my galaxy note 2 checksum my orignal rom
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If you download the rom directly onto the device you can us a file manager like es file explorer to check the md5 with the one that is listed on the site you download it from.
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I use MD5 Checker from the Play Store.
I copy and paste the MD5 from wherever I download it and then find browse to the file and select it. Then calculate to see whether or not it matches. If it matches, both MD5's turn green. If they don't match, they turn red.
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MD5 verification is a guarantee that nothing happened from the moment you downloaded the file from a site to the point you saved it on your device or where it is need to start flashing/installation. It is a "legal protection" in case a corrupted file finds its way on installation and causes problems. It is a safety check.
I found all this out AFTER flashing without even checking MD5 on a Samsung S5.
Nothing happened as in most cases but if it did anyone would tell I had been warned.
Agree with @disconnecktie on the File Manager option for any medium users.
hello, has been posted in the forum roms and kernels, but has not been posted MD5, peopl developers to post the MD5 to help those who download.
Sheldon, Your post is difficult to understand but from what I gather, you would like developers to post MD5 sums for files. If this correct let me respond by saying that my ROM's have an automatic MD5 sum in the file and the file is zipped. If the zip file is corrupt I would expect CRC errors and you can't flash a file that you can not extract. When you go to flash the file, Odin does an MD5 checksum and you can not flash it if the checksum fails. By zipping the file and including the built in MD5 sum. I am insuring that people are not flashing garbage to their device.
Is that what you are worried about?
Forgive me, but unfortunately my native language is not English ... So .. my research on this forum are very complicated.
After several attempts and with great difficulty I managed to download from droidbasemment "cm-10-20121030-EXPERIMENTAL-p4.zip."
At the same address I see that there is a file "cm-10-20121030-EXPERIMENTAL-p4.zip.md5sum" which I think is the MD5 of the ROM file of 152.52 MB.
If so, how can I verify the MD5 to make sure that the downloaded file is not corrupt?
Many thanks to those who want to answer. Hi
kRel said:
Forgive me, but unfortunately my native language is not English ... So .. my research on this forum are very complicated.
After several attempts and with great difficulty I managed to download from droidbasemment "cm-10-20121030-EXPERIMENTAL-p4.zip."
At the same address I see that there is a file "cm-10-20121030-EXPERIMENTAL-p4.zip.md5sum" which I think is the MD5 of the ROM file of 152.52 MB.
If so, how can I verify the MD5 to make sure that the downloaded file is not corrupt?
Many thanks to those who want to answer. Hi
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most recoveries will verify the file automatically if that md5sum file is in the same place as the ROM when you flash it. If you want to make sure now, just open the md5sum file in any text editor to see the correct md5 and then look at the properties of the ROM zip file and look at the calculated sum there and confirm they match.
kRel there is a app just for this, I have it on my pc, give me some time and I will post it for ya. dill
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PuckMercury said:
most recoveries will verify the file automatically if that md5sum file is in the same place as the ROM when you flash it. If you want to make sure now, just open the md5sum file in any text editor to see the correct md5 and then look at the properties of the ROM zip file and look at the calculated sum there and confirm they match.
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Thank you for your quick response ...
The problem is that ... if I open the zip file "cm-10-20121030-EXPERIMENTAL-p4.zip.md5sum", inside there is nothing!
dillfever said:
kRel there is a app just for this, I have it on my pc, give me some time and I will post it for ya. dill
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Thank you ... this applet I also have in my computer. It integrates in "explorer" and is called "HashTab v3.0.0"
But the problem is that inside the file: cm-10-20121030-EXPERIMENTAL-p4.zip.md5sum nothing!
If you have the Wifi 7510 tab that is the wrong md5, you want the p4wifi md5
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---------- Post added at 08:35 AM ---------- Previous post was at 08:32 AM ----------
Do you have winzip or 7zip, you need a file extractor to open the md5 zip?
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also...
search market for md5 and you'll find a ton of apps the will calc the md5 from a file you can compare that to the hash inside the md5 file posted by pershoot.
md5sum -c /path/to/file.md5
The *.md5 file and the file it corresponds to must be in the same directory together. This works from your device in a terminal as well.
I discovered the mystery ....
Opening the file from linux (ubuntu) shows a normal text file containing the MD5!
CWM is also able to read and verify the MD5. But I have not understand how to.
Maybe you need to copy the file to your tablet also MD5??
i have a md5 checker and 2 differnt downloads dont match the md5 the liquid quincy att checksum at least with this md5checker im using
I use md5 checker all the time with no problems. I'm thinking the download is bad.
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Bad download... but u would check md5 on windows or android?
I use Android file verifier on Android....most of the time just to be sure the file on my phone is good
Hey Guys I Use This Guide To Check MD5 http://forum.xda-developers.com/showthread.php?t=706705
But MD5 Checker Report Code Doesn't Match Although It Actually Matches