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epicyon
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Constant salts

main2
Bob Mottram 2019-10-25 13:44:40 +01:00
parent a98158f2ae
commit 67f843607d
1 changed files with 8 additions and 6 deletions
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14
daemon.py
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@ -2834,13 +2834,15 @@ class PubServer(BaseHTTPRequestHandler):
print('Login success: '+loginNickname)
self.send_response(303)
# This produces a deterministic token based on nick+password+salt
# But notice that the salt is ephemeral, so a server reboot changes them.
# This allows you to be logged in on two or more devices with the
# same token, but also ensures that if an adversary obtains the token
# then rebooting the server is sufficient to thwart them, without
# any password changes.
if not self.server.salts.get(loginNickname):
self.server.salts[loginNickname]=createPassword(32)
saltFilename=baseDir+'/accounts/'+loginNickname+'@'+self.server.domain+'/.salt'
if os.path.isfile(saltFilename):
with open(saltFilename, 'r') as fp:
self.server.salts[loginNickname] = fp.read()
else:
self.server.salts[loginNickname]=createPassword(32)
with open(saltFilename, 'w') as fp:
fp.write(self.server.salts[loginNickname])
self.server.tokens[loginNickname]=sha256((loginNickname+loginPassword+self.server.salts[loginNickname]).encode('utf-8')).hexdigest()
self.server.tokensLookup[self.server.tokens[loginNickname]]=loginNickname
self.send_header('Set-Cookie', 'epicyon='+self.server.tokens[loginNickname]+'; SameSite=Strict')