We seem to be coming across a number of virii at the moment with people replacing valid tools with trojans. One solution is to provide an MD5 checksum on files you upload so users can verify they are legitimate days/weeks/months down the line. The process is very simple.
1) Zip/rar up your archive as normal.
2) Load the MD5 GUI tool, click the 'Generate Checksum' radio box, and drag your file onto it.
3) Click 'To Clipboard' and paste the result into your forum post.
Users need to perform a similar task, dragging the file they downloaded into MD5 GUI and verifying the checksums are the same.
Background: An MD5 checksum, or one-way hash, is a unique identifier for a stream of data. If even a single character is changed in the stream a completely different checksum is generated. This means if checksums do match, the downloaded file must match the original provided by the uploader.
This information may be old news for experienced users but those new to android may find it useful.
When downloading a new ROM that you would like to flash, it is always possible for corruption to occur. Either in the download itself or in storing it to the SD card. In order to address this issue, most ROMs put out by developers also include an MD5SUM for that ROM. This MD5SUM is used to verify that all of the bits in the file came across right.
Below are instructions on how to verify if the file that you have on your SD card on the phone is not corrupted.. These instructions assume that the file is located at the root of the SD card (as would be needed for flashing ROMs but not necessarily for Recovery Images).
All lines will automatically start with the $ symbol, you need not type this in. Every line ends by pressing the enter key, do not include the quotation marks. The command to show a directory is ls (lower case L and lower case S). this is done in the example to make sure that you use the correct file name when calling the md5sum command.
Open Terminal Emulator
Type "cd /sdcard" and press Enter
Type "ls" or "ls *.zip" to only show zip files and press Enter
This will provide a list of files at the root of the sd card.
Type "md5sum <filename>" substituting the name of the file listed in the ls command for <filename>.
An MD5SUM value will be calculated and displayed. Verify this value against what is published by the developer. If it is correct, go ahead and flash, if not try redownloading the file and repeat. If you continue to get a different MD5SUM value, try downloading it from a different (perhaps mirrored) site
In my example below, I combined the ls command to show only zip files (so that you can see it all on one screen)
http://twitpic.com/39cc3y
Alternatively, you can call the md5sum command with the *.zip or *.img argument and get an md5sum for all files of those types.
For additional information on md5sums, check out this link http://forum.xda-developers.com/showthread.php?t=706705
awesome!
Thank you for helping new people like me who are just entering the Android game.
Sent from my HTC Glacier using XDA App
check md5 file on pc
download a program called teradata
can be found here:
http://www.codesector.com/teracopy.php
install program
open md5 file
ta-da, this will tell you if the files are ok or not
QMAN101 said:
This information may be old news for experienced users but those new to android may find it useful.
When downloading a new ROM that you would like to flash, it is always possible for corruption to occur. Either in the download itself or in storing it to the SD card. In order to address this issue, most ROMs put out by developers also include an MD5SUM for that ROM. This MD5SUM is used to verify that all of the bits in the file came across right.
Below are instructions on how to verify if the file that you have on your SD card on the phone is not corrupted.. These instructions assume that the file is located at the root of the SD card (as would be needed for flashing ROMs but not necessarily for Recovery Images).
All lines will automatically start with the $ symbol, you need not type this in. Every line ends by pressing the enter key, do not include the quotation marks. The command to show a directory is ls (lower case L and lower case S). this is done in the example to make sure that you use the correct file name when calling the md5sum command.
Open Terminal Emulator
Type "cd /sdcard" and press Enter
Type "ls" or "ls *.zip" to only show zip files and press Enter
This will provide a list of files at the root of the sd card.
Type "md5sum <filename>" substituting the name of the file listed in the ls command for <filename>.
An MD5SUM value will be calculated and displayed. Verify this value against what is published by the developer. If it is correct, go ahead and flash, if not try redownloading the file and repeat. If you continue to get a different MD5SUM value, try downloading it from a different (perhaps mirrored) site
In my example below, I combined the ls command to show only zip files (so that you can see it all on one screen)
http://twitpic.com/39cc3y
Alternatively, you can call the md5sum command with the *.zip or *.img argument and get an md5sum for all files of those types.
For additional information on md5sums, check out this link http://forum.xda-developers.com/showthread.php?t=706705
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Click to collapse
Wow, thank you for that! I've been wondering wtf an md5sum is. Now I know.
missing info
Thanks for posting this information - very well written and appears to leave no steps out.
One thing I have to say about a lot of the instructions that are posted about modding - they leave out important step(s) that would be needed to complete the process. Usually it's something that's easily overlooked; what the screen should look like after completing a step, prior to starting the next step. One example, that messed me up (in the past), is partitioning: many instructions gave examples on partitioning, but don't say how to configure the partition (primary, extended, etc)... I had to figure out why my android G1 wasn't working exactly as advertised, because the instructions I found were incomplete.
I think that's why video instructions are awesome - although through bad editing they can suck too.
It's hard work writing instructions, and I thank the people who do, but please write down everything.
This post is just a tangent brought on by reading the original, very well written post.
How did I miss your great post!!! Nice little write up for me checking files on the go.
-John
And for the mac users out there you simply need to open a terminal and type:
md5 <filename>
Or you can get afv (android file verifyer) from the market and just click on the file to generate the md5. Easier if you do it all the time
ahh thanks for spilling the beans
i keep getting "error checking md5sums" when restoring a nandroid back up
I think my SD card is buggered. Its nearly 18 months old and a hell of a lot of transfers on and off it. Maybe time to replace.
i use mand5 and it has an option to google search that checksum. Makes it convenient when devs post the checksum in the OP of their thread because then the search will find it and i can clearly see it's right, 4ext recovery also calculates md5s as well
Another excellent program for verifying checksums on Windows based PCs is Hashcheck. After installation, you'll find a new tab in the properties window of any file which will generate many different types of checksums and contains a box you can type or paste an existing checksum such as one posted with the download. It integrates cleanly with most versions of Windows. You can even use it to create a .md5 checksum file that can be opened to verify the file at any time. This is one of the first applications I install on a clean Windows installation.
And whoever suggested teracopy, it seems to run quite buggy on certain PC setups with mid-transfer freezes and such even on.a fresh Windows installation. SuperCopier is another alternative free file copy/transfer application that I've never seen fail on any of the systems I've used and which has quite similar.functionality to teracopy. Granted, I've only tried a limited number of PCs, but that number continues to grow as I'm basically the technical go-to guy in my family and neighborhood due to my background as a current software programming major.
Sent from my HTC Glacier using Tapatalk
Sorry, double post. My fat fingers hit quote instead of modify.
Sent from my HTC Glacier using Tapatalk
Hash Droid
The app called Hash Droid works perfect for me.
If I helped please press thanks.
hi i have 57bb26ddcc2a9d4de10585ef209b7580 as md5sum and s-off only support
2092edb4aa79638199e3165a99896b0f
1ade7f845c31a6abb2e4b5c34851b685
9346c72901cadd03f6cdcf4f95266dcc
b0efbe061011445ab5e94a63d5cb2faf
6ca900ca68e34601fe46187ae9abbfd5
what should i do to get s-off? i have minu rom 11.19
Redownload the iso or what ever file you need. Make sure you deleat the old file and clear cash just to be sure, also do check md5 again
Sent from my HTC Desire using XDA App
Exactly that, that shows the download you've done is corrupt
This is not a case of S-OFF only supporting anything.
This is to do with the intergity of the file you have downloaded.
If your downloaded file does not EXACTLY match the MD5 checksum on the website - DO NOT, I repeat DO NOT try and flash it, you will more than likely brick your phone.
Burn the CD at the lowest speed possible to avoid errors. Might be a bad CD, not a bad download.
The MD5 checksum is on the download not the actual CD - if the download doesn't match then don't burn the CD
i am new on this i wos worked whit 6.5 hd2 all things
can somebody give links about why we must check md 5 what is that
some basic things i look on net but is so dificult to understanding
thanks
Md5 is like a validation that a package is complete I.e not corrupt. If there is an Md5 value with a download, you run the package through an Md5 app and if the output matches, its all good.
If you're on windows, Google winMd5
Sent from my HTC Desire using XDA App
Md5 is something like file integrity check.
More info: http://en.wikipedia.org/wiki/MD5
I use this tool: http://www.pc-tools.net/win32/md5sums/
Drag & drop the file on the .exe and it generates the MD5 sum.
5 md I realized how much like a fingerprint jedinstver which every rom there correct me if I am wrong I am specially interested in what was to check the MD 5 the numbers are small, or something within the file, I have not found anywhere video tutorial because it would mean a lot of people who are struggling with English so well as I do, and thus reduce the number of posts with the same issues apologize ...one more for this
It says to verify md5... I downloaded the file verifier off the market. Now where do I go and how do I verify the md5? Thanks in advance!
I usually verify the MD5 on my computer, then transfer the zip to my SD card. I'm not sure how to do it from the phone.
EDIT: I downloaded MD5 Checker from the Market to my phone. You'll need to browse to the zip file for the radio, and copy/paste the MD5 hash that the zip is supposed to have. It'll run to see if the two match.
Okay... I am looking at this:
To flash:
1. Place on ROOT directory of your FAT32 formatted SD card & rename to only PB31IMG.zip.
2. Boot into hboot (volume down + power) & confirm the radio update.
3. When done updating select reboot now. Do not try to boot immediately into recovery from hboot.
Newest First:
2.15.00.08.08
Download: http://www.mediafire...an7zwl5642jxv2j
Md5: DB604392CB81DC6C7323C8151937CBEF
2.15.10.07.07
Download: http://www.mediafire...6fkv5ywe6esc6mr
Md5: 50AFC97ABB7AA5AE6D3114D940AB22F1
So... what am I verifying these md5's against?
RMarkwald said:
EDIT: I downloaded MD5 Checker from the Market to my phone. You'll need to browse to the zip file for the radio, and copy/paste the MD5 hash that the zip is supposed to have. It'll run to see if the two match.
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Click to collapse
Ah.. Gotcha! Thanks! Gonna go try that.
cniDXDinc said:
Ah.. Gotcha! Thanks! Gonna go try that.
Click to expand...
Click to collapse
Yeah, you'll want to browse to the location of the radio zip file, and copy the MD5 the website lists into the MD5 field, then run the checker to see if the MD5 matches.