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Verify TLS chain of trust, warn user if it fails. #165

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Verify TLS chain of trust, warn user if it fails. #165

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19 changes: 14 additions & 5 deletions electrumx/server/peers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -265,7 +265,7 @@ async def _should_drop_peer(self, peer):

kwargs = {'family': family}
if kind == 'SSL':
kwargs['ssl'] = ssl.SSLContext(ssl.PROTOCOL_TLS)
kwargs['ssl'] = True

if self.env.force_proxy or peer.is_tor:
if not self.proxy:
Expand All @@ -283,10 +283,19 @@ async def _should_drop_peer(self, peer):

peer_text = f'[{peer}:{port} {kind}]'
try:
async with connect_rs(peer.host, port, session_factory=PeerSession,
**kwargs) as session:
session.sent_request_timeout = 120 if peer.is_tor else 30
await self._verify_peer(session, peer)
try:
async with connect_rs(peer.host, port, session_factory=PeerSession,
**kwargs) as session:
session.sent_request_timeout = 120 if peer.is_tor else 30
await self._verify_peer(session, peer)
except ssl.SSLCertVerificationError as e:
self.logger.warn(f'{peer.host} {e}')
self.logger.warn(f'Please ask {peer.host} to properly configure with a CA such as letsencrypt.org')
kwargs['ssl'] = ssl.SSLContext(ssl.PROTOCOL_TLS)
async with connect_rs(peer.host, port, session_factory=PeerSession,
**kwargs) as session:
session.sent_request_timeout = 120 if peer.is_tor else 30
await self._verify_peer(session, peer)
is_good = True
break
except BadPeerError as e:
Expand Down