What is it? i read somewhere that if a radio and checksum don't match, it has a negative effect.
its pretty simple. its just a set of numbers and letters, if they match up perfectly with the one in the op of the radio or rom then your good to go. If they dont match you run the risk of bricking your phone. http://forum.xda-developers.com/showthread.php?t=706705
supraman89 said:
its pretty simple. its just a set of numbers and letters, if they match up perfectly with the one in the op of the radio or rom then your good to go. If they dont match you run the risk of bricking your phone. http://forum.xda-developers.com/showthread.php?t=706705
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what if they don't match? how do you change it?
pranker98 said:
what if they don't match? how do you change it?
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Download it again and check. No way to fix it if it's corrupt, i.e. MD5 sums don't match.
MD5 is a mathematical algorithm, used in encryption and other security applications.
When you run MD5 software on a file it performs the calculation and out comes a long hexedecimal number which is refered to as the MD5 checksum.
It's customary for this checksum to be posted along with the link to files such as ROMs and radios.
When you download, you can then run your own MD5 software on the downloaded file. It will perform the exact same mathematical calculation and give you the MD5 checksum of the file you have downloaded.
If your checksum matches the one posted by the dev, you can be sure you have an accurate copy of the downloaded file. If they don't match, then your download is either corrupt, or possibly some kind of trojan.
You should never install any software if the MD5 sum does not match the one provided by the dev. Instead, try downloading the file again, perhaps from a different mirror. If all else fails, contact the dev as it's possible they might have posted an incorrect checksum, or may have an alternate means by which you can obtain the file.
Tromador said:
MD5 is a mathematical algorithm, used in encryption and other security applications.
When you run MD5 software on a file it performs the calculation and out comes a long hexedecimal number which is refered to as the MD5 checksum.
It's customary for this checksum to be posted along with the link to files such as ROMs and radios.
When you download, you can then run your own MD5 software on the downloaded file. It will perform the exact same mathematical calculation and give you the MD5 checksum of the file you have downloaded.
If your checksum matches the one posted by the dev, you can be sure you have an accurate copy of the downloaded file. If they don't match, then your download is either corrupt, or possibly some kind of trojan.
You should never install any software if the MD5 sum does not match the one provided by the dev. Instead, try downloading the file again, perhaps from a different mirror. If all else fails, contact the dev as it's possible they might have posted an incorrect checksum, or may have an alternate means by which you can obtain the file.
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how do you verify if they match or not?
crazyandroider said:
how do you verify if they match or not?
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use any file manager you have and navigate to the zip file
tap and hold on it and select properties
somewhere it will say show md5 checksum or calculate md5 checksum
you will see a row of numbers and letters
then check it if it is the same withe one from the download link
Related
Can Someone Please explain MD5 ... The uses and how to compare and check?
Many thanks in advance
What it does, how it works:
en.wikipedia.org/wiki/Md5
Program to calculate checksums (for example):
en.wikipedia.org/wiki/Md5sum
http://implbits.com/Products/HashTab.aspx this puts a tab on your (right click -> properties) and you can compare it there. makes MD5 easy.
its a way of error-detecting to see if it verifies 100% without any errors. this is critical when updating radios and things. if you have a bad copy of it then you may brick your phone or cause damage because you received a corrupted version
zephiK said:
http://implbits.com/Products/HashTab.aspx this puts a tab on your (right click -> properties) and you can compare it there. makes MD5 easy.
its a way of error-detecting to see if it verifies 100% without any errors. this is critical when updating radios and things. if you have a bad copy of it then you may brick your phone or cause damage because you received a corrupted version
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I sort of get it....just ....what are you checking it with....so say i download a radio.img , then i check its md5 against what ? how would i know that whatever md 5 it had generated is the right one.....sorry for the questions
menov321 said:
I sort of get it....just ....what are you checking it with....so say i download a radio.img , then i check its md5 against what ? how would i know that whatever md 5 it had generated is the right one.....sorry for the questions
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the OP would include a MD5. once you download it, right click the file you downloaded and go to the hash tab and copy paste the one the OP pasted.. copy paste it into the box and if it matches a check will appear meaning its 100% identical
if OP doesn't include one then you cant check
zephiK said:
the OP would include a MD5. once you download it, right click the file you downloaded and go to the hash tab and copy paste the one the OP pasted.. copy paste it into the box and if it matches a check will appear meaning its 100% identical
if OP doesn't include one then you cant check
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OP????
what happens though if it isnt identical......
When it isn't identical, then the file got corrupted.
This can happen in a variety of ways, including:
- There was an error during download
- There was an error during the original upload
- The file got corrupted during storage on the server
- The file got corrupted because of an write/read error on your hard disk
- Someone purposefully manipulated the file, for example including a virus or even changed the file so that it would brick your device if you install it.
In any case: If the md5 doesn't match, then installing it is a big NO NO.
Effects can range from no problems over occasional errors and crashes to a completely bricked device (especially, if the error happens to be in the bootloader).
Or if someone manipulated the file willingly, he could be spying on you or causing you costs by making your phone send messages or doing calls to special expensive numbers. Or he could use your phone as a proxy for various illegal things.
PS: OP = orginal poster = the person who posted the file on the first place
Thank-you very much I understand now ....nice comprehensive answer....thanks though to all who posted
Sent from my Nexus S using XDA Premium App
Can somebody explain MD5 to me in retard terms? How do I know what my phone needs? And how do i know if it's ok to flash?
I'm sorry I'm a retard... Lol
THUNDERBOLT
Seriously, has everyone forgotten what Google is? md5sum is a file's unique "fingerprint". It is posted to help downloaders ensure that they have the exact same file as what was uploaded.
Md5sum is essentially a digital fingerprint for a given file. The reason they are given is that it will give you a clue as to whether or not you have a complete and correct (exact) download. This is especially important in flashing a radio file. You will see them in rom threads too, but it is most important for a radio (PG05IMG.zip)
Flashing a bad radio in hboot can and will brick your phone. Flashing a bad rom or kernel in recovery is quite recoverable.
You can download an app called AFV (android file verifier) from the market and can calculate the md5 of any file and you just compare it to what is in generally the OP of any thread.
ridobe said:
Md5sum is essentially a digital fingerprint for a given file. The reason they are given is that it will give you a clue as to whether or not you have a complete and correct (exact) download. This is especially important in flashing a radio file. You will see them in rom threads too, but it is most important for a radio (PG05IMG.zip)
Flashing a bad radio in hboot can and will brick your phone. Flashing a bad rom or kernel in recovery is quite recoverable.
You can download an app called AFV (android file verifier) from the market and can calculate the md5 of any file and you just compare it to what is in generally the OP of any thread.
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Thanks
THUNDERBOLT
Ok I'm a "Noob" to the Android phenom happening. Don't scold me for asking plz.
I've got "S-OFF" on my Sensation 4G and am flashing ROM's to see which I like but I'm not sure my MD5 is right.
PYRAMID PVT SHIP S-OFF RL
HBOOT - 1.17.1011
RADIO - 10.13.9035.19_M
That's what my phone is showing but i keep seeing I need 10.54.9035.00U_10.13.9035.19_M
Being that the last is identical am I good or do I need to try some other method to update the RADIO?
MD5 is to check for files.. not for phones..
This is md5.
In regards to your question, yes, you have the correct radio. You will not see "10.54.9035.00U" if you are in the bootloader screen.
However, you will see it under settings->about phone->software.
MD5 sum checks integrity of the file. There should be an MD5 listed for the file you are downloading.
Download the file, then checksum. If it matches the MD5 listed, you're good to go.
If not, there's something wrong with the file, try to download again. If still no good, get on the thread and let somebody know. Big files (like ROMs) may take a minute or two to before sum appears, be patient.
P.
PaulGiz said:
MD5 sum checks integrity of the file. There should be an MD5 listed for the file you are downloading.
Download the file, then checksum. If it matches the MD5 listed, you're good to go.
If not, there's something wrong with the file, try to download again. If still no good, get on the thread and let somebody know. Big files (like ROMs) may take a minute or two to before sum appears, be patient.
P.
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What file to download?
Just look around on the site you downloaded it from, there usually is a MD5 provided. You will just have to compare the numbers (you can do that when rebooting into recovery, then trying to find check MD5 of a file, then selecting the file you want to check).
I don't know about an automatic way to check it with recovery, with some ROM update mechanism it might.
This is an MD5 sum btw: 555d6458ed45e716eb22ced991393e35 and they must match exactly otherwise your download went wrong somewhere and you should download the files again.
Hello,
I'm trying to modify a couple of roms to remove some APKs and add anothers, (Supercharged and Lithium) but I keep getting md5 mismatch, even though I modified the MD5 files with the new MD5 values (using md5sums for windows)
Can you tell me what am I doing wrong / how to force CWM Recovery to ignore the MD5 files?
Thanks
The easiest thing to do is to bypass md5sum checks by leaving the md5 file empty.
cogeary said:
The easiest thing to do is to bypass md5sum checks by leaving the md5 file empty.
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It didn't work with an empty file, neither did it without an md5 file
Deivid_ said:
It didn't work with an empty file, neither did it without an md5 file
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I've had problems with if having bad checks even with an empty md5 file. formatting my sdcard fixed it. Just backup your stuff first. hopefully yo don't have 28 GB of music like me
Here is a MD5 checker for windows machines. It calculates the MD5 then displays a form with two buttons, you can either paste a MD5 into the text box and then check the calculated MD5 with the entered MD5 to see if they match.
Or after calculating the MD5 you can simply get the MD5 of the file you selected. Its very easy to use.
Find your file in windows explorer, right click on the file, and then select "Send To" and choose MD5 Checker and thats it
MD5 Of attached ZIP:
475756e348dec543514a9de3a88f15a4
MD5 of installer exe file:
bf1f925c29c60308bfe134c2dc131d0c
elesbb said:
Here is a MD5 checker for windows machines. It calculates the MD5 then displays a form with two buttons, you can either paste a MD5 into the text box and then check the calculated MD5 with the entered MD5 to see if they match.
Or after calculating the MD5 you can simply get the MD5 of the file you selected. Its very easy to use.
Find your file in windows explorer, right click on the file, and then select "Send To" and choose MD5 Checker and thats it
MD5 Of attached ZIP:
475756e348dec543514a9de3a88f15a4
MD5 of installer exe file:
bf1f925c29c60308bfe134c2dc131d0c
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Click to collapse
The MD5 of the attachments in this post.....if the person is downloading your app (unless they did as I have just done - I have an MD5 checker already) would suggest that they don't have an MD5 app already so the numbers you have posted seen pointless to the end user. They would have to install your app to check the integrity of the file they just downloaded.....and the purpose of providing the MD5 number is to check the download for either corruption and/or misformation caused by malware insertion etc.
Some constructive feedback. The installer looks nice and professional.
The app....how does it work? I have been using MD5 check and SHA1 and SHA2 checking for quite sometime now (so I know what I am talking about). I have mine setup through right click context menus.
Do you select the app in explorer with your app open and then go generate MD5??? No instructions?
Your uninstall method is messy and lefts junk/fragments etc in on the drive. The directory remain as well as the uninstall executable.
Jarmezrocks said:
The MD5 of the attachments in this post.....if the person is downloading your app (unless they did as I have just done - I have an MD5 checker already) would suggest that they don't have an MD5 app already so the numbers you have posted seen pointless to the end user. They would have to install your app to check the integrity of the file they just downloaded.....and the purpose of providing the MD5 number is to check the download for either corruption and/or misformation caused by malware insertion etc.
Some constructive feedback. The installer looks nice and professional.
The app....how does it work? I have been using MD5 check and SHA1 and SHA2 checking for quite sometime now (so I know what I am talking about). I have mine setup through right click context menus.
Do you select the app in explorer with your app open and then go generate MD5??? No instructions?
Your uninstall method is messy and lefts junk/fragments etc in on the drive. The directory remain as well as the uninstall executable.
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Uninstall isn't even mine. It's auto created by the packaging tool I'm using.
I kind of also have left this to the side as it doesn't seem popular.
And I don't know what you mean by saying posting the md5s of my tool is pointless. It's just a reference for people to familiarize themselves with md5 hash keys.
And all you do is select the file you want to check and right click it then select "send to" then "md5 checker" and it will generate the hash key then enable the interface.
Again I pretty much quit this. Nobody's interested.
Sent from my SGH-T999 using Tapatalk 2
elesbb said:
Here is a MD5 checker for windows machines. It calculates the MD5 then displays a form with two buttons, you can either paste a MD5 into the text box and then check the calculated MD5 with the entered MD5 to see if they match.
Or after calculating the MD5 you can simply get the MD5 of the file you selected. Its very easy to use.
Find your file in windows explorer, right click on the file, and then select "Send To" and choose MD5 Checker and thats it
MD5 Of attached ZIP:
475756e348dec543514a9de3a88f15a4
MD5 of installer exe file:
bf1f925c29c60308bfe134c2dc131d0c
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Click to collapse
__________________________________
give stars for the tool
one star for the sig whats up with that post in that forum? that angry person is crazy lol. Does he own the servers that run xda? i Mean is he the boss? Can't be. I dunno I gotta find out what thats about though its going drive me crazy if i don't pm me even pleasee lol
I know you said you pretty much quit this, but I just discovered it, and I am interested in getting it working as described in the OP.
I installed your program & set up the sendto, but the MD5 Checker.exe GUI front end for md5sum.exe isn't working. "Get MD5" doesn't do anything, and "Check MD5" always returns a mismatch.
Is this incompatible with Win7 x64, or have I screwed something up installing it?
Thanks.