Michael Altfield

https://michaelaltfield.net/

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Michael Altfield
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toPrivacy@lemmy.ml•How to check if Tor Onion Service is alive?
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1•4d

This can be done by querying the “Hidden Service Descriptor”.

By default, Onion Services publish a “Hidden Service Descriptor” to the Tor network’s distributed Hidden Service Directory (HDir) every 3 hours.

The Hidden Service Descriptor returned by the HDir contains the metadata necessary for a client to connect to the Onion Service.

If a given Onion Service’s Hidden Service Descriptor cannot be found, then the Onion Service is likely dead.

Script

Here’s a simple python script that queries the HDir for a list of onions

from stem.control import Controller
from stem.descriptor.hidden_service import HiddenServiceDescriptorV3
 
onions = ['2n3tvihf4n27pqyqdtcqywl33kbjuv2kj3eeq6qvbtud57jwiaextmid.onion', '32qywqnlnqzbry42nmotr47ebts3k6lhiwfob6xniosmepz2tsnsx7ad.onion', '4colmnerbjz3xtsjmqogehtpbt5upjzef57huilibbq3wfgpsylub7yd.onion', '6voaf7iamjpufgwoulypzwwecsm2nu7j5jpgadav2rfqixmpl4d65kid.onion', '6w5iasklrbr2kw53zqrsjktgjapvjebxodoki3gjnmvb4dvcbmz7n3qd.onion', '7drfpncjeom3svqkyjitif26ezb3xvmtgyhgplcvqa7wwbb4qdbsjead.onion', 'ae3w7fkzr3elfwsk6mhittjj7e7whme2tumdrhw3dfumy2hsiwomc3yd.onion', 'chillingguw3yu2rmrkqsog4554egiry6fmy264l5wblyadds3c2lnyd.onion', 'fzdx522fvinbaqgwxdet45wryluchpplrkkzkry33um5tufkjd3wdaqd.onion', 'gku6irp4e65ikfkbrdx576zz6biapv37vv2cmklo2qyrtobugwz5iaad.onion', 'gois4b6fahhrlsieupl56xd6ya226m33abzuv26vgfpuvv44wf6vbdad.onion', 'j4dhkkxfcsvzvh3p5djkmuehhgd6t6l7wmzih6b4ss744hegwkiae7ad.onion', 'jabjabdea2eewo3gzfurscj2sjqgddptwumlxi3wur57rzf5itje2rid.onion', 'jaswtrycaot3jzkr7znje4ebazzvbxtzkyyox67frgvgemwfbzzi6uqd.onion', 'jeirlvruhz22jqduzixi6li4xyoweytqglwjons4mbuif76fgslg5uad.onion', 'jukrlvyhgguiedqswc5lehrag2fjunfktouuhi4wozxhb6heyzvshuyd.onion', 'mrbenqxl345o4u7yaln25ayzz5ut6ab3kteulzqusinjdx6oh7obdlad.onion', 'nixnet54icmeh25qsmcsereuoareofzevjqjnw3kki6oxxey3jonwwyd.onion', 'qawb5xl3mxiixobjsw2d45dffngyyacp4yd3wjpmhdrazwvt4ytxvayd.onion', 'qwikoouqore6hxczat3gwbe2ixjpllh3yuhaecixyenprbn6r54mglqd.onion', 'qwikxxeiw4kgmml6vjw2bsxtviuwjce735dunai2djhu6q7qbacq73id.onion', 'razpihro3mgydaiykvxwa44l57opvktqeqfrsg3vvwtmvr2srbkcihyd.onion', 'rurcblzhmdk22kttfkel2zduhyu3r6to7knyc7wiorzrx5gw4c3lftad.onion', 'szd7r26dbcrrrn4jthercrdypxfdmzzrysusyjohn4mpv2zbwcgmeqqd.onion', 'xdkriz6cn2avvcr2vks5lvvtmfojz2ohjzj4fhyuka55mvljeso2ztqd.onion', 'xiynxwxxpw7olq76uhrbvx2ts3i7jagqnqix7arfbknmleuoiwsmt5yd.onion', 'xmppccwrohw3lmfap6e3quep2yzx3thewkfhw4vptb5gwgnkttlq2vyd.onion', 'ynnuxkbbiy5gicdydekpihmpbqd4frruax2mqhpc35xqjxp5ayvrjuqd.onion', 'yxkc2uu3rlwzzhxf2thtnzd7obsdd76vtv7n34zwald76g5ogbvjbbqd.onion']
 
controller = Controller.from_port(port=9051)
controller.authenticate()
if controller.is_alive():
  print( "INFO: Confirmed that Tor is working." )
 
print( "INFO: Trying get_hidden_service_descriptor()" )
for onion in onions:
	print( onion )
	try:
		desc = controller.get_hidden_service_descriptor(onion)
		print( "\tOK" )
	except Exception as e:
		print( "\tNo Descriptor Found" )

Example

And an example execution of the above script follows

user@disp6307:~$ time sudo python3 get_hidden_service_descriptor.py 
INFO: Confirmed that Tor is working.
INFO: Trying get_hidden_service_descriptor()
2n3tvihf4n27pqyqdtcqywl33kbjuv2kj3eeq6qvbtud57jwiaextmid.onion
   OK
32qywqnlnqzbry42nmotr47ebts3k6lhiwfob6xniosmepz2tsnsx7ad.onion
   OK
4colmnerbjz3xtsjmqogehtpbt5upjzef57huilibbq3wfgpsylub7yd.onion
   OK
6voaf7iamjpufgwoulypzwwecsm2nu7j5jpgadav2rfqixmpl4d65kid.onion
   OK
6w5iasklrbr2kw53zqrsjktgjapvjebxodoki3gjnmvb4dvcbmz7n3qd.onion
   No Descriptor Found
7drfpncjeom3svqkyjitif26ezb3xvmtgyhgplcvqa7wwbb4qdbsjead.onion
   No Descriptor Found
ae3w7fkzr3elfwsk6mhittjj7e7whme2tumdrhw3dfumy2hsiwomc3yd.onion
   OK
chillingguw3yu2rmrkqsog4554egiry6fmy264l5wblyadds3c2lnyd.onion
   OK
fzdx522fvinbaqgwxdet45wryluchpplrkkzkry33um5tufkjd3wdaqd.onion
   OK
gku6irp4e65ikfkbrdx576zz6biapv37vv2cmklo2qyrtobugwz5iaad.onion
   OK
gois4b6fahhrlsieupl56xd6ya226m33abzuv26vgfpuvv44wf6vbdad.onion
   OK
j4dhkkxfcsvzvh3p5djkmuehhgd6t6l7wmzih6b4ss744hegwkiae7ad.onion
   OK
jabjabdea2eewo3gzfurscj2sjqgddptwumlxi3wur57rzf5itje2rid.onion
   OK
jaswtrycaot3jzkr7znje4ebazzvbxtzkyyox67frgvgemwfbzzi6uqd.onion
   OK
jeirlvruhz22jqduzixi6li4xyoweytqglwjons4mbuif76fgslg5uad.onion
   OK
jukrlvyhgguiedqswc5lehrag2fjunfktouuhi4wozxhb6heyzvshuyd.onion
   No Descriptor Found
mrbenqxl345o4u7yaln25ayzz5ut6ab3kteulzqusinjdx6oh7obdlad.onion
   No Descriptor Found
nixnet54icmeh25qsmcsereuoareofzevjqjnw3kki6oxxey3jonwwyd.onion
   OK
qawb5xl3mxiixobjsw2d45dffngyyacp4yd3wjpmhdrazwvt4ytxvayd.onion
   No Descriptor Found
qwikoouqore6hxczat3gwbe2ixjpllh3yuhaecixyenprbn6r54mglqd.onion
   OK
qwikxxeiw4kgmml6vjw2bsxtviuwjce735dunai2djhu6q7qbacq73id.onion
   OK
razpihro3mgydaiykvxwa44l57opvktqeqfrsg3vvwtmvr2srbkcihyd.onion
   No Descriptor Found
rurcblzhmdk22kttfkel2zduhyu3r6to7knyc7wiorzrx5gw4c3lftad.onion
   OK
szd7r26dbcrrrn4jthercrdypxfdmzzrysusyjohn4mpv2zbwcgmeqqd.onion
   OK
xdkriz6cn2avvcr2vks5lvvtmfojz2ohjzj4fhyuka55mvljeso2ztqd.onion
   OK
xiynxwxxpw7olq76uhrbvx2ts3i7jagqnqix7arfbknmleuoiwsmt5yd.onion
   OK
xmppccwrohw3lmfap6e3quep2yzx3thewkfhw4vptb5gwgnkttlq2vyd.onion
   OK
ynnuxkbbiy5gicdydekpihmpbqd4frruax2mqhpc35xqjxp5ayvrjuqd.onion
   No Descriptor Found
yxkc2uu3rlwzzhxf2thtnzd7obsdd76vtv7n34zwald76g5ogbvjbbqd.onion
   OK
 
real  0m53.311s
user  0m0.005s
sys   0m0.006s
user@disp6307:~$

Attribution

This script was originally published here.

For more information, see the article linked-to above.

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How to check if Tor Onion Service is alive?
How can I check to see if a given Onion Service is still in-use? To be clear: I'm *not* asking about just Onion Services bound to port 80. Of course I can just `curl` it, but that won't tell me if the Onion Service is running something on another port. I'm trying to find an XMPP server that uses an Onion Service. I found [several lists](https://forums.whonix.org/t/xmpp-onion-service-only-no-clearnet/21379/4) of XMPP servers and their `.onion` names, but I expect most of these services are offline. ``` 2n3tvihf4n27pqyqdtcqywl33kbjuv2kj3eeq6qvbtud57jwiaextmid.onion 32qywqnlnqzbry42nmotr47ebts3k6lhiwfob6xniosmepz2tsnsx7ad.onion 4colmnerbjz3xtsjmqogehtpbt5upjzef57huilibbq3wfgpsylub7yd.onion 6voaf7iamjpufgwoulypzwwecsm2nu7j5jpgadav2rfqixmpl4d65kid.onion 6w5iasklrbr2kw53zqrsjktgjapvjebxodoki3gjnmvb4dvcbmz7n3qd.onion 7drfpncjeom3svqkyjitif26ezb3xvmtgyhgplcvqa7wwbb4qdbsjead.onion ae3w7fkzr3elfwsk6mhittjj7e7whme2tumdrhw3dfumy2hsiwomc3yd.onion chillingguw3yu2rmrkqsog4554egiry6fmy264l5wblyadds3c2lnyd.onion fzdx522fvinbaqgwxdet45wryluchpplrkkzkry33um5tufkjd3wdaqd.onion gku6irp4e65ikfkbrdx576zz6biapv37vv2cmklo2qyrtobugwz5iaad.onion gois4b6fahhrlsieupl56xd6ya226m33abzuv26vgfpuvv44wf6vbdad.onion j4dhkkxfcsvzvh3p5djkmuehhgd6t6l7wmzih6b4ss744hegwkiae7ad.onion jabjabdea2eewo3gzfurscj2sjqgddptwumlxi3wur57rzf5itje2rid.onion jaswtrycaot3jzkr7znje4ebazzvbxtzkyyox67frgvgemwfbzzi6uqd.onion jeirlvruhz22jqduzixi6li4xyoweytqglwjons4mbuif76fgslg5uad.onion jukrlvyhgguiedqswc5lehrag2fjunfktouuhi4wozxhb6heyzvshuyd.onion mrbenqxl345o4u7yaln25ayzz5ut6ab3kteulzqusinjdx6oh7obdlad.onion nixnet54icmeh25qsmcsereuoareofzevjqjnw3kki6oxxey3jonwwyd.onion qawb5xl3mxiixobjsw2d45dffngyyacp4yd3wjpmhdrazwvt4ytxvayd.onion qwikoouqore6hxczat3gwbe2ixjpllh3yuhaecixyenprbn6r54mglqd.onion qwikxxeiw4kgmml6vjw2bsxtviuwjce735dunai2djhu6q7qbacq73id.onion razpihro3mgydaiykvxwa44l57opvktqeqfrsg3vvwtmvr2srbkcihyd.onion rurcblzhmdk22kttfkel2zduhyu3r6to7knyc7wiorzrx5gw4c3lftad.onion szd7r26dbcrrrn4jthercrdypxfdmzzrysusyjohn4mpv2zbwcgmeqqd.onion xdkriz6cn2avvcr2vks5lvvtmfojz2ohjzj4fhyuka55mvljeso2ztqd.onion xiynxwxxpw7olq76uhrbvx2ts3i7jagqnqix7arfbknmleuoiwsmt5yd.onion xmppccwrohw3lmfap6e3quep2yzx3thewkfhw4vptb5gwgnkttlq2vyd.onion ynnuxkbbiy5gicdydekpihmpbqd4frruax2mqhpc35xqjxp5ayvrjuqd.onion yxkc2uu3rlwzzhxf2thtnzd7obsdd76vtv7n34zwald76g5ogbvjbbqd.onion ``` I don't want to eliminate them just for not running an HTTP server (eg port 80, 443, 8080, etc). Nor do I want to eliminate them for not running on a common XMPP port (5222, 5223, 5269, 5298, 8010). I'm trying to find something that checks if an Onion Service has been used in the past days/weeks *without* requiring me to test a connection on a given port. My understanding is that Onion Services will (by default) generate and [publish hidden service descriptors](https://spec.torproject.org/rend-spec/hsdesc.html) (HSDir). Is there some way I can query the Tor directory of HSDirs to see if a given Onion Service is still active?
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How to check if Tor Onion Service is alive?
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