Hi All, 

I am using Nginx 1.4.4 as reverse proxy for my tomcat server. My problem is:
SSL handshake failed between Nginx and tomcat with mutual SSL
authentication. I have verified that Client to Nginx with mutual SSL is
working. But if my upstream backend is also using https:mutual port, the
path will fail with error:
[error] 1816#3436: *23 SSL_do_handshake() failed (SSL: error:14094412:SSL
routines:SSL3_READ_BYTES:sslv3 alert bad certificate:SSL alert number 42)
while SSL handshaking to upstream, client: xx.xx.xx.xx, server:
xx.xxx.xxx.xxx, request: "GET / HTTP/1.1", upstream:
"https://xx.xx.xx.xx:8082/";, host: "xx.xx.xx.xx:8002"

My upstream server https://xx.xx.xx.xx:8082 is using mutual SSL and working
perfectly without Nginx.
the Nginx host https://xx.xx.xx.xx:8002 is using mutual SSL and also working
perfectly without the upstream mutual ssl or with only http port.
The problem is: when both Nginx and upstream require mutual SSL, and I would
like to pass the client certificate to Nginx then to my upstream server, the
SSL handshake error occurs.

I have tried to add client cert in headers, but no luck. Here is part of my
nginx config
####    
        server {
                listen       xx.xx.xx.xx:8002;
                server_name  xx.xx.xx.xx;       
                
                ssl on;
                ssl_certificate C:/nginx-1.4.4/cert/MyServer.crt;
                ssl_certificate_key C:/nginx-1.4.4/cert/MyServer.key;
                                
                ssl_client_certificate C:/nginx-1.4.4/cert/MyCA.pem;    
                ssl_trusted_certificate C:/nginx-1.4.4/cert/MyCA.pem;
                
                ssl_prefer_server_ciphers  on;          
                ssl_verify_client on;
                ssl_verify_depth 3;
                ssl_protocols  SSLv2 SSLv3 TLSv1;

                access_log  C:/nginx-1.4.4/logs/access_8002.log;
                error_log  C:/nginx-1.4.4/logs/error_8002.log debug;
                
                root   html;
                index  index.html index.htm;
         
                location / {
                 proxy_pass  https://10.128.103.47:8082/;
                 proxy_redirect default;
                 proxy_set_header Host $host:$server_port;
                  
                 proxy_set_header        X-Real-IP       $remote_addr;
                 proxy_set_header               Client-IP $remote_addr;
                 proxy_set_header        X-Forwarded-For 
$proxy_add_x_forwarded_for;
                 proxy_set_header                X-Forwarded-Ssl on;
                proxy_set_header    X-Client-Verify  $ssl_client_verify;
                proxy_set_header        X-SSL-Client-Cert $ssl_client_cert;     
                proxy_set_header        X-SSL-Client-Serial $ssl_client_serial;
                proxy_set_header        X-SSL-Client-Verify $ssl_client_verify;
                proxy_set_header        X-SSL-Client-S-DN   $ssl_client_s_dn;   
                 
           }
        }

Is this usage supported by Nginx? 
I would be very grateful if someone can point me some clues or suggestions.

Thanks and Best Regards,
Flash008

Posted at Nginx Forum: 
http://forum.nginx.org/read.php?2,245971,245971#msg-245971

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