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A context menu (right-click menu) entry called "checksum" say with options for md5, sha1, sha256 etc would be useful to quickly verify file integrity. If not a new menu entry, then perhaps in the "properties" view of a file there should be a new tab called "checksums" which can be calculated on demand...

Any suggestions to add such a context menu myself? I'm running KDE 4.3 RC2 and would like to add right-click menus for files in dolphin to invoke checksum tools and display in a dialog... (unless something is already out there...)

edit: oops, sorry for posting a question in a brainstorm post

Found the following link in the mean time, will look at it: http://techbase.kde.org/Development/Tut ... vice_Menus

(didnt know it was called "service menu" so wasnt sure what to search for until now)

And a quickie solution! Place the following code as a .desktop file in a "ServiceMenus" subdirectory in either of the paths shown by:

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kde4-config --path services

checksum.desktop file:

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[Desktop Entry]
Type=Service
Icon=dolphin
Actions=ShowMD5Hash;ShowSHA1Hash;ShowSHA256Hash
ServiceTypes=KonqPopupMenu/Plugin
MimeType=all/allfiles

[Desktop Action ShowMD5Hash]
Exec=md5sum %U | xargs kdialog --title "MD5 hash" --msgbox
Icon=dolphin
Name=Show MD5 hash

[Desktop Action ShowSHA1Hash]
Exec=sha1sum %U | xargs kdialog --title "SHA1 hash" --msgbox
Icon=dolphin
Name=Show SHA1 hash

[Desktop Action ShowSHA256Hash]
Exec=sha256sum %U | xargs kdialog --title "SHA256 hash" --msgbox
Icon=dolphin
Name=Show SHA256 hash


Improvements to the checksum tool to add 2 new features: Actually try to verify the file integrity by searching for stored checksum files and also display a progress dialog (throbber) while the checksum is being verified so you know something is happening

Copy the following code as root/sudo into a script file, say checkhash.sh, into /usr/bin after making it executable.

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#! /bin/sh
toolname=`echo $1 | sed "s/\(.*\)/\L\1sum/"`
filepath=`echo $2 | sed "s/\(.*\/\).*/\1/"`
hashfile=`echo $1 | sed "s/\(.*\)/\U\1SUMS/"`
dialogtitle=`echo $1 | sed "s/\(.*\)/\U\1/"`
dcopRef=`kdialog --progressbar "Checking $dialogtitle hash, please wait..." 0 --title "Check $dialogtitle Hash"`
result=`$toolname $2`
filename=`echo $result | sed "s/^\([0-9a-z]*\) .*\/\(.*\)/\2/g"`
checksum=`echo $result | sed "s/^\([0-9a-z]*\) .*\/\(.*\)/\1/g"`
lookup=`grep ${filename} ${filepath}*${hashfile}* 2>/dev/null | grep ${checksum} 2>/dev/null`
findhash=`grep ${checksum} ${filepath}*${hashfile}* 2>/dev/null`
findfile=`grep ${filename} ${filepath}*${hashfile}* 2>/dev/null`
integrity=`if [ "${findfile}file" = "file" ]; then echo unknown; else if [ "${lookup}sum" = "sum" ]; then echo bad; else echo good; fi; fi;`
qdbus $dcopRef org.kde.kdialog.ProgressDialog.close
kdialog --title "Check $dialogtitle Hash" --msgbox "Filename: ${filename}\nChecksum: ${checksum}\nIntegrity: ${integrity}"


Change the checksum.desktop file mentioned in earlier post to have the following code instead:

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[Desktop Entry]
Type=Service
Icon=security-high
Actions=CheckMD5Hash;CheckSHA1Hash;CheckSHA256Hash
ServiceTypes=KonqPopupMenu/Plugin
MimeType=all/allfiles

[Desktop Action CheckMD5Hash]
Exec=checkhash.sh md5 %U
Icon=security-high
Name=Check MD5 Hash

[Desktop Action CheckSHA1Hash]
Exec=checkhash.sh sha1 %U
Icon=security-high
Name=Check SHA1 Hash

[Desktop Action CheckSHA256Hash]
Exec=checkhash.sh sha256 %U
Icon=security-high
Name=Check SHA256 Hash


This is to showcase my lame shell scripting skillz, I'm sure this can be cleaned up some more and bugs found and fixed.

Right now, based on convention, it will try to generate the checksum and compare it with any checksums stored in files with SHA256SUMS or MD5SUMS etc in the name. Usually when you download an ISO or something the same web location has the SHA1SUMS file which you normally download to the same local folder.

Works well for me after some quick testing, hope it works for you...

Screenshots:

We definitely need more Indians on this forum

heh.

but: bug bug bug, i think it cant handle spaces in the paths

more corrected is:
(i add "" to work with file names, which contain " "(space))

vishalrao wrote:Copy the following code as root/sudo into a script file, say checkhash.sh, into /usr/bin after making it executable.

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#! /bin/sh
toolname=`echo $1 | sed "s/\(.*\)/\L\1sum/"`
filepath=`echo $2 | sed "s/\(.*\/\).*/\1/"`
hashfile=`echo $1 | sed "s/\(.*\)/\U\1SUMS/"`
dialogtitle=`echo $1 | sed "s/\(.*\)/\U\1/"`
dcopRef=`kdialog --progressbar "Checking $dialogtitle hash, please wait..." 0 --title "Check $dialogtitle Hash"`
result=`$toolname "$2"`
filename=`echo $result | sed "s/^\([0-9a-z]*\) .*\/\(.*\)/\2/g"`
checksum=`echo $result | sed "s/^\([0-9a-z]*\) .*\/\(.*\)/\1/g"`
lookup=`grep ${filename} ${filepath}*${hashfile}* 2>/dev/null | grep ${checksum} 2>/dev/null`
findhash=`grep ${checksum} ${filepath}*${hashfile}* 2>/dev/null`
findfile=`grep ${filename} ${filepath}*${hashfile}* 2>/dev/null`
integrity=`if [ "${findfile}file" = "file" ]; then echo unknown; else if [ "${lookup}sum" = "sum" ]; then echo bad; else echo good; fi; fi;`
qdbus $dcopRef org.kde.kdialog.ProgressDialog.close
kdialog --title "Check $dialogtitle Hash" --msgbox "Filename: ${filename}\nChecksum: ${checksum}\nIntegrity: ${integrity}"


Change the checksum.desktop file mentioned in earlier post to have the following code instead:

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[Desktop Entry]
Type=Service
Icon=security-high
Actions=CheckMD5Hash;CheckSHA1Hash;CheckSHA256Hash
ServiceTypes=KonqPopupMenu/Plugin
MimeType=all/allfiles

[Desktop Action CheckMD5Hash]
Exec=checkhash.sh md5 "%U"
Icon=security-high
Name=Check MD5 Hash

[Desktop Action CheckSHA1Hash]
Exec=checkhash.sh sha1 "%U"
Icon=security-high
Name=Check SHA1 Hash

[Desktop Action CheckSHA256Hash]
Exec=checkhash.sh sha256 "%U"
Icon=security-high
Name=Check SHA256 Hash


I think this line needs to be corrected, but I will check it maybe during the weekend:

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filepath=`echo $2 | sed "s/\(.*\/\).*/\1/"`

@alex: oh i see, you fixed this line to add the double-quotes, thanks! i will try it to see if it works:

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result=`$toolname "$2"`

edit:

also needed to do the same (add double quotes) for the 2 lines using grep and the filepath line:

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...
filepath=`echo "$2" | sed "s/\(.*\/\).*/\1/"`
...
lookup=`grep "${filename}" ${filepath}*${hashfile}* 2>/dev/null | grep ${checksum} 2>/dev/null`
...
findfile=`grep "${filename}" ${filepath}*${hashfile}* 2>/dev/null`


i think its working better now, thanks!

Very cool. I'm going to nitpick on the use of quotes around %U in the .desktop file though. They are not necessary and indeed prohibited:

According to

http://standards.freedesktop.org/desktop-entry-spec/latest/ar01s06.html :

"Field codes must not be used inside a quoted argument, the result of field code expansion inside a quoted argument is undefined. The %F and %U field codes may only be used as an argument on their own."