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nginx HTTPS reverse proxy causes the client to fail to connect to server in unintuitive way

See original GitHub issue

Hi,

Electrum Wallet 3.3.4 on OSX, same problem on Windows.

I’m testing an instance of electrum server. Everything works well when using it in clear (http port 50001) as well as through Tor, but when I use it with TLS (I installed a letsencrypt TLS certificate), Electrum wallet always gives me this error:

[i][electrum.kexkey.com] disconnecting due to: SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:777)')

Used -s electrum.kexkey.com:50002:s when starting up.

Are you aware of any recent TLS problems with python or electrum wallet? When I hit https://electrum.kexkey.com on port 443 or 50002, the browser tells me the certificate is valid.

Thanks!

Issue Analytics

State:
Created 5 years ago
Comments:18 (8 by maintainers)

Top GitHub Comments

1reaction

SomberNightcommented, Mar 18, 2019

Your port 50002 points to an nginx HTTP webserver. Of course Electrum cannot connect… It should point to the JSON RPC endpoint of an electrum server.

Compare

electrum.qtornado.com:50002:s

$ openssl s_client -connect electrum.qtornado.com:50002
CONNECTED(00000003)
depth=0 C = US, ST = California, O = Internet Widgits Pty Ltd, CN = electrum.qtornado.com
verify error:num=18:self signed certificate
verify return:1
depth=0 C = US, ST = California, O = Internet Widgits Pty Ltd, CN = electrum.qtornado.com
verify return:1
---
Certificate chain
 0 s:/C=US/ST=California/O=Internet Widgits Pty Ltd/CN=electrum.qtornado.com
   i:/C=US/ST=California/O=Internet Widgits Pty Ltd/CN=electrum.qtornado.com
---
Server certificate
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
subject=/C=US/ST=California/O=Internet Widgits Pty Ltd/CN=electrum.qtornado.com
issuer=/C=US/ST=California/O=Internet Widgits Pty Ltd/CN=electrum.qtornado.com
---
No client certificate CA names sent
Peer signing digest: SHA512
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 2235 bytes and written 269 bytes
Verification error: self signed certificate
---
New, TLSv1.2, Cipher is ECDHE-RSA-AES256-GCM-SHA384
Server public key is 4096 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : ECDHE-RSA-AES256-GCM-SHA384
    Session-ID: 6FE2ACAACFF2EA5D8225C71CD9343B8C9E4085F19019471CDCA915298421EC75
    Session-ID-ctx: 
    Master-Key: 068A285D15C93ACD5814DA0CDD0738E3A3EF748E9E726EC3B086C99EB7C437C9B87FEDCE4C8CB748BFA0CFB795F1328F
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    TLS session ticket lifetime hint: 7200 (seconds)
    TLS session ticket:
    0000 - c1 35 e3 bd e1 1f 68 e4-10 be e1 4a a6 56 63 11   .5....h....J.Vc.
    0010 - 92 ac 7c 32 34 d9 56 38-3a 7e 3f 8f 85 76 f3 81   ..|24.V8:~?..v..
    0020 - 61 8d f2 5e 13 c4 4c 48-4c 23 9a 18 b8 23 5c 5e   a..^..LHL#...#\^
    0030 - b4 ed 61 60 3b 6b 1d 93-7d 0d 23 8e 28 d4 42 6a   ..a`;k..}.#.(.Bj
    0040 - e7 24 0e ad 3d 71 8f d1-24 e4 5f 6f ca a4 07 63   .$..=q..$._o...c
    0050 - 4a 18 84 03 b7 5b d8 34-e9 4b 73 1f 49 14 ad 9d   J....[.4.Ks.I...
    0060 - de f6 ce bc d1 77 24 20-2d a4 1f bb 16 38 8b fa   .....w$ -....8..
    0070 - 1a 70 1f 9f 16 7b 95 a1-10 c9 34 05 c5 f5 62 79   .p...{....4...by
    0080 - 08 80 fb b8 52 ec c0 ec-46 85 6b 0f 09 77 c3 2e   ....R...F.k..w..
    0090 - 26 ca f4 9c 0a 7a dd 9f-ad e0 ac d9 d2 07 75 44   &....z........uD

    Start Time: 1552942274
    Timeout   : 7200 (sec)
    Verify return code: 18 (self signed certificate)
    Extended master secret: yes
---
{"id": 1, "method": "server.version", "params": ["testing", "1.4"]}
{"jsonrpc": "2.0", "result": ["ElectrumX 1.9.5", "1.4"], "id": 1}

with

electrum.kexkey.com:50002:s

$ openssl s_client -connect electrum.kexkey.com:50002
CONNECTED(00000003)
depth=0 CN = letsencrypt-nginx-proxy-companion
verify error:num=18:self signed certificate
verify return:1
depth=0 CN = letsencrypt-nginx-proxy-companion
verify return:1
---
Certificate chain
 0 s:/CN=letsencrypt-nginx-proxy-companion
   i:/CN=letsencrypt-nginx-proxy-companion
---
Server certificate
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
subject=/CN=letsencrypt-nginx-proxy-companion
issuer=/CN=letsencrypt-nginx-proxy-companion
---
No client certificate CA names sent
Peer signing digest: SHA512
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 1974 bytes and written 269 bytes
Verification error: self signed certificate
---
New, TLSv1.2, Cipher is ECDHE-RSA-AES256-GCM-SHA384
Server public key is 4096 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : ECDHE-RSA-AES256-GCM-SHA384
    Session-ID: 4C54DA293B694200A8E8928735D2EF676763FD2D1E525EE294BD0F459189A7D5
    Session-ID-ctx: 
    Master-Key: F2231FF397683E5873DD050284864933C5828CEF60D740FEC60B85E531418734D59E4F8A66039D14AC579E4C39C4A497
    PSK identity: None
    PSK identity hint: None
    SRP username: None
    Start Time: 1552942358
    Timeout   : 7200 (sec)
    Verify return code: 18 (self signed certificate)
    Extended master secret: yes
---
{"id": 1, "method": "server.version", "params": ["testing", "1.4"]}
HTTP/1.1 400 Bad Request
Server: nginx/1.14.1
Date: Mon, 18 Mar 2019 20:52:44 GMT
Content-Type: text/html
Content-Length: 173
Connection: close

<html>
<head><title>400 Bad Request</title></head>
<body bgcolor="white">
<center><h1>400 Bad Request</h1></center>
<hr><center>nginx/1.14.1</center>
</body>
</html>
read:errno=0

1reaction

SomberNightcommented, Mar 18, 2019

did you try the server? Did it work?

I’ve tried connecting to electrum.kexkey.com:50001 using TCP, there I get: [i][electrum.kexkey.com] disconnecting due to: ConnectionRefusedError(111, "Connect call failed ('158.69.33.222', 50001)")

I’ve also tried electrum.kexkey.com:50002 using SSL, there I get: [n] couldn't launch iface electrum.kexkey.com:50002:s -- TimeoutError()

I’ve assumed you turned off the server. Reaching a timeout does not suggest SSL related errors. Are you sure your server is on, listening on that port, and that port is open?

Out of curiosity, do you know why Electrum Wallet doesn’t just simply use the CA signed cert if available, behaving like a browser dealing with a cert?

It does that! Electrum is very flexible here, as explained in my link above, it accepts both CA signed certs and self-signed certs.

I created an empty file (touch) and it still doesn’t connect ([i][electrum.kexkey.com] disconnecting due to: CancelledError()). I decided to copy the certificate in the file (I exported it from the browser) and it gives me the same SSLError message (CERTIFICATE_VERIFY_FAILED).

You shouldn’t fiddle too much with the stuff in the certs dir (for the client); apart from maybe deleting files already there, for debugging purposes.