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Authenticating to HTTP proxy does not work
#1
Hello,

I have a HTTP proxy that requires authentication and I'd like to use it for tracker communications.

I went to Options -> Connection -> Proxy, ticked [x] Enable proxying of tracker communications and put in my proxy address, port, username and password. Then I restarted Vuze.

Unfortunately it does not work. Vuze reports:

Code:
[tracker] Error from scrape interface https://tracker.example.com.invalid/scrape.php : Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required" (class java.io.IOException)

I verified the authentication problem with tcpdump and indeed no proxy authentication is sent by Vuze. Here's the request:

Code:
CONNECT tracker.example.com.invalid:443 HTTP/1.1
User-Agent: Java/1.8.0_121
Host: tracker.example.com.invalid
Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
Proxy-Connection: keep-alive

There is no Proxy-Authorization header in the request. Compare to a typical request sent by a web browser:

Code:
CONNECT www.example.com.invalid:443 HTTP/1.1
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:51.0) Gecko/20100101 Firefox/51.0
Proxy-Connection: keep-alive
Connection: keep-alive
Host: www.example.com.invalid:443
Proxy-Authorization: Basic cMirc3k6a69sbG8=

Note the Proxy-Authorization header, which is required to authenticate to the HTTP proxy.

Is this a bug in Vuze or is it just not supported, despite the UI allowing me to enter username and password for the HTTP proxy?
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#2
Hmm, Vuze relies on Java to handle the authentication protocol flow but it does seem to not be setting the username/password properties for HTTPS - I'll try adding this in - please test in the next beta (B23) - see https://wiki.vuze.com/w/Beta_Program
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#3
Quote:I'll try adding this in - please test in the next beta (B23)
 

Thank you for your help, will do.

(Embarrassingly I forgot to mention that I was running B18 on Linux x86-64)
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#4
Quote:please test in the next beta (B23)
 

Unfortunately still no proxy authentication in B23.

If you're still interested in pursuing then I'll help however I can.
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#5
darn it :( I'll think on it some more, thanks!
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#6
Bah, can't find a proxy server to test against. Tried installing WinGate but darned if I can get it to authenticate anything :(
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#7
Actually I got it working by using a second machine for the proxy - NTLM was getting in somehow and marking all my test connections as authenticated.

Anyway, once setup I can see HTTPS CONNECTs being authorized correctly and everything appears to work - not sure where this leaves things! I'll try and wireshark it to see what's being sent
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#8
When I set the tracker to a (fake) https://www.vuze.com address I got


Code:
CONNECT www.vuze.com:443 HTTP/1.1
User-Agent: Java/1.8.0_77
Host: www.vuze.com
Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
Proxy-Connection: keep-alive
Proxy-authorization: Basic Sm9lIEZhcnQ6dnV6ZQ==

HTTP/1.1 200 Connection established
Date: Tue, 21 Feb 2017 21:25:14 GMT
Server: WinGate Engine
Connection: Keep-Alive

I must say though that there's something odd about the fact that even though I set the username/password under the proxy settings I still got a prompt to enter them once
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#9
Thank you again for your effort. Unfortunately still no luck for me (tested again on B24), no proxy authentication gets sent and no password prompts either.

I guess you're using Windows? Maybe it's platform dependent. I could set up a virtual machine and test Vuze on Windows to verify your results.
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#10
For my test setup I had the proxy running on Windows 7 and the client on OSX 10.12.3

Do you have any other network settings in place? Bindings for example? I know there are some issues with the fact that the native HTTP(S) connection library doesn't support binding and therefore there is a hack work around that might be causing proxy issues.
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