X-Git-Url: https://code.wpia.club/?a=blobdiff_plain;f=lib%2Fopenssl%2Fdoc%2Fapps%2Fs_time.pod;fp=lib%2Fopenssl%2Fdoc%2Fapps%2Fs_time.pod;h=5a38aa2e03944f29ba3f93b8ea29609fefd4c4f8;hb=9ff1530871deeb0f7eaa35ca0db6630724045e4a;hp=0000000000000000000000000000000000000000;hpb=25b73076b01ae059da1a2e9a1677e00788ada620;p=cassiopeia.git diff --git a/lib/openssl/doc/apps/s_time.pod b/lib/openssl/doc/apps/s_time.pod new file mode 100644 index 0000000..5a38aa2 --- /dev/null +++ b/lib/openssl/doc/apps/s_time.pod @@ -0,0 +1,173 @@ + +=pod + +=head1 NAME + +s_time - SSL/TLS performance timing program + +=head1 SYNOPSIS + +B B +[B<-connect host:port>] +[B<-www page>] +[B<-cert filename>] +[B<-key filename>] +[B<-CApath directory>] +[B<-CAfile filename>] +[B<-reuse>] +[B<-new>] +[B<-verify depth>] +[B<-nbio>] +[B<-time seconds>] +[B<-ssl2>] +[B<-ssl3>] +[B<-bugs>] +[B<-cipher cipherlist>] + +=head1 DESCRIPTION + +The B command implements a generic SSL/TLS client which connects to a +remote host using SSL/TLS. It can request a page from the server and includes +the time to transfer the payload data in its timing measurements. It measures +the number of connections within a given timeframe, the amount of data +transferred (if any), and calculates the average time spent for one connection. + +=head1 OPTIONS + +=over 4 + +=item B<-connect host:port> + +This specifies the host and optional port to connect to. + +=item B<-www page> + +This specifies the page to GET from the server. A value of '/' gets the +index.htm[l] page. If this parameter is not specified, then B will only +perform the handshake to establish SSL connections but not transfer any +payload data. + +=item B<-cert certname> + +The certificate to use, if one is requested by the server. The default is +not to use a certificate. The file is in PEM format. + +=item B<-key keyfile> + +The private key to use. If not specified then the certificate file will +be used. The file is in PEM format. + +=item B<-verify depth> + +The verify depth to use. This specifies the maximum length of the +server certificate chain and turns on server certificate verification. +Currently the verify operation continues after errors so all the problems +with a certificate chain can be seen. As a side effect the connection +will never fail due to a server certificate verify failure. + +=item B<-CApath directory> + +The directory to use for server certificate verification. This directory +must be in "hash format", see B for more information. These are +also used when building the client certificate chain. + +=item B<-CAfile file> + +A file containing trusted certificates to use during server authentication +and to use when attempting to build the client certificate chain. + +=item B<-new> + +performs the timing test using a new session ID for each connection. +If neither B<-new> nor B<-reuse> are specified, they are both on by default +and executed in sequence. + +=item B<-reuse> + +performs the timing test using the same session ID; this can be used as a test +that session caching is working. If neither B<-new> nor B<-reuse> are +specified, they are both on by default and executed in sequence. + +=item B<-nbio> + +turns on non-blocking I/O. + +=item B<-ssl2>, B<-ssl3> + +these options disable the use of certain SSL or TLS protocols. By default +the initial handshake uses a method which should be compatible with all +servers and permit them to use SSL v3, SSL v2 or TLS as appropriate. +The timing program is not as rich in options to turn protocols on and off as +the L program and may not connect to all servers. + +Unfortunately there are a lot of ancient and broken servers in use which +cannot handle this technique and will fail to connect. Some servers only +work if TLS is turned off with the B<-ssl3> option; others +will only support SSL v2 and may need the B<-ssl2> option. + +=item B<-bugs> + +there are several known bug in SSL and TLS implementations. Adding this +option enables various workarounds. + +=item B<-cipher cipherlist> + +this allows the cipher list sent by the client to be modified. Although +the server determines which cipher suite is used it should take the first +supported cipher in the list sent by the client. +See the L command for more information. + +=item B<-time length> + +specifies how long (in seconds) B should establish connections and +optionally transfer payload data from a server. Server and client performance +and the link speed determine how many connections B can establish. + +=back + +=head1 NOTES + +B can be used to measure the performance of an SSL connection. +To connect to an SSL HTTP server and get the default page the command + + openssl s_time -connect servername:443 -www / -CApath yourdir -CAfile yourfile.pem -cipher commoncipher [-ssl3] + +would typically be used (https uses port 443). 'commoncipher' is a cipher to +which both client and server can agree, see the L command +for details. + +If the handshake fails then there are several possible causes, if it is +nothing obvious like no client certificate then the B<-bugs>, B<-ssl2>, +B<-ssl3> options can be tried +in case it is a buggy server. In particular you should play with these +options B submitting a bug report to an OpenSSL mailing list. + +A frequent problem when attempting to get client certificates working +is that a web client complains it has no certificates or gives an empty +list to choose from. This is normally because the server is not sending +the clients certificate authority in its "acceptable CA list" when it +requests a certificate. By using L the CA list can be +viewed and checked. However some servers only request client authentication +after a specific URL is requested. To obtain the list in this case it +is necessary to use the B<-prexit> option of L and +send an HTTP request for an appropriate page. + +If a certificate is specified on the command line using the B<-cert> +option it will not be used unless the server specifically requests +a client certificate. Therefor merely including a client certificate +on the command line is no guarantee that the certificate works. + +=head1 BUGS + +Because this program does not have all the options of the +L program to turn protocols on and off, you may not be +able to measure the performance of all protocols with all servers. + +The B<-verify> option should really exit if the server verification +fails. + +=head1 SEE ALSO + +L, L, L + +=cut