I have a .onion site. Is it possible to change the private key on my existing domain?
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1Could you elaborate a bit? Right now it is unclear to me what you want to do.– Jens KubiezielCommented Oct 21, 2015 at 22:49
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1Just a thought: Why would you want to use a new private key but keep the .onion address? If someone else has your private key, then this would not help. Even if you could brute-force a different private key that hashes to the same .onion address, it would not stop the other person from doing anything they can do if you just keep the same key: either way, they have as much control over the .onion as you do. So if you need a new private key, you don't need just any old key, but one that yields a different .onion address.– JobiwanCommented Nov 8, 2015 at 22:13
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1 Answer
Your host name is calculated from your private key.
If you change your private key, you will get a new host name.
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After reading your comment I wondered how to do this and found a oneliner on swehack.org/viewtopic.php?f=37&p=6978:
U=$(openssl rsa -in a.pem -pubout -outform DER | tail -c +23 | shasum | head -c 20 | python -c "import base64,sys; print base64.b32encode(sys.stdin.readline().strip('\n').decode('hex')).lower()"); echo "http://${U}.onion"– sourcxCommented Sep 20, 2016 at 13:51