.\" Automatically generated by Pod::Man 2.27 (Pod::Simple 3.28) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" openssl\-s_time, s_time \- SSL/TLS performance timing program .SH "SYNOPSIS" .IX Header "SYNOPSIS" \&\fBopenssl\fR \fBs_time\fR [\fB\-connect host:port\fR] [\fB\-www page\fR] [\fB\-cert filename\fR] [\fB\-key filename\fR] [\fB\-CApath directory\fR] [\fB\-CAfile filename\fR] [\fB\-trusted_first\fR] [\fB\-reuse\fR] [\fB\-new\fR] [\fB\-verify depth\fR] [\fB\-nbio\fR] [\fB\-time seconds\fR] [\fB\-ssl2\fR] [\fB\-ssl3\fR] [\fB\-bugs\fR] [\fB\-cipher cipherlist\fR] .SH "DESCRIPTION" .IX Header "DESCRIPTION" The \fBs_time\fR command implements a generic \s-1SSL/TLS\s0 client which connects to a remote host using \s-1SSL/TLS.\s0 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. .SH "OPTIONS" .IX Header "OPTIONS" .IP "\fB\-connect host:port\fR" 4 .IX Item "-connect host:port" This specifies the host and optional port to connect to. .IP "\fB\-www page\fR" 4 .IX Item "-www page" This specifies the page to \s-1GET\s0 from the server. A value of '/' gets the index.htm[l] page. If this parameter is not specified, then \fBs_time\fR will only perform the handshake to establish \s-1SSL\s0 connections but not transfer any payload data. .IP "\fB\-cert certname\fR" 4 .IX Item "-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 \s-1PEM\s0 format. .IP "\fB\-key keyfile\fR" 4 .IX Item "-key keyfile" The private key to use. If not specified then the certificate file will be used. The file is in \s-1PEM\s0 format. .IP "\fB\-verify depth\fR" 4 .IX Item "-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. .IP "\fB\-CApath directory\fR" 4 .IX Item "-CApath directory" The directory to use for server certificate verification. This directory must be in \*(L"hash format\*(R", see \fBverify\fR for more information. These are also used when building the client certificate chain. .IP "\fB\-CAfile file\fR" 4 .IX Item "-CAfile file" A file containing trusted certificates to use during server authentication and to use when attempting to build the client certificate chain. .IP "\fB\-trusted_first\fR" 4 .IX Item "-trusted_first" Use certificates in \s-1CA\s0 file or \s-1CA\s0 directory over the certificates provided by the server when building the trust chain to verify server certificate. This is mainly useful in environments with Bridge \s-1CA\s0 or Cross-Certified CAs. .IP "\fB\-new\fR" 4 .IX Item "-new" performs the timing test using a new session \s-1ID\s0 for each connection. If neither \fB\-new\fR nor \fB\-reuse\fR are specified, they are both on by default and executed in sequence. .IP "\fB\-reuse\fR" 4 .IX Item "-reuse" performs the timing test using the same session \s-1ID\s0; this can be used as a test that session caching is working. If neither \fB\-new\fR nor \fB\-reuse\fR are specified, they are both on by default and executed in sequence. .IP "\fB\-nbio\fR" 4 .IX Item "-nbio" turns on non-blocking I/O. .IP "\fB\-ssl2\fR, \fB\-ssl3\fR" 4 .IX Item "-ssl2, -ssl3" these options disable the use of certain \s-1SSL\s0 or \s-1TLS\s0 protocols. By default the initial handshake uses a method which should be compatible with all servers and permit them to use \s-1SSL\s0 v3, \s-1SSL\s0 v2 or \s-1TLS\s0 as appropriate. The timing program is not as rich in options to turn protocols on and off as the \fIs_client\fR\|(1) program and may not connect to all servers. .Sp 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 \s-1TLS\s0 is turned off with the \fB\-ssl3\fR option; others will only support \s-1SSL\s0 v2 and may need the \fB\-ssl2\fR option. .IP "\fB\-bugs\fR" 4 .IX Item "-bugs" there are several known bug in \s-1SSL\s0 and \s-1TLS\s0 implementations. Adding this option enables various workarounds. .IP "\fB\-cipher cipherlist\fR" 4 .IX Item "-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 \fIciphers\fR\|(1) command for more information. .IP "\fB\-time length\fR" 4 .IX Item "-time length" specifies how long (in seconds) \fBs_time\fR should establish connections and optionally transfer payload data from a server. Server and client performance and the link speed determine how many connections \fBs_time\fR can establish. .SH "NOTES" .IX Header "NOTES" \&\fBs_time\fR can be used to measure the performance of an \s-1SSL\s0 connection. To connect to an \s-1SSL HTTP\s0 server and get the default page the command .PP .Vb 1 \& openssl s_time \-connect servername:443 \-www / \-CApath yourdir \-CAfile yourfile.pem \-cipher commoncipher [\-ssl3] .Ve .PP would typically be used (https uses port 443). 'commoncipher' is a cipher to which both client and server can agree, see the \fIciphers\fR\|(1) command for details. .PP If the handshake fails then there are several possible causes, if it is nothing obvious like no client certificate then the \fB\-bugs\fR, \fB\-ssl2\fR, \&\fB\-ssl3\fR options can be tried in case it is a buggy server. In particular you should play with these options \fBbefore\fR submitting a bug report to an OpenSSL mailing list. .PP 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 \*(L"acceptable \s-1CA\s0 list\*(R" when it requests a certificate. By using \fIs_client\fR\|(1) the \s-1CA\s0 list can be viewed and checked. However some servers only request client authentication after a specific \s-1URL\s0 is requested. To obtain the list in this case it is necessary to use the \fB\-prexit\fR option of \fIs_client\fR\|(1) and send an \s-1HTTP\s0 request for an appropriate page. .PP If a certificate is specified on the command line using the \fB\-cert\fR 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. .SH "BUGS" .IX Header "BUGS" Because this program does not have all the options of the \&\fIs_client\fR\|(1) program to turn protocols on and off, you may not be able to measure the performance of all protocols with all servers. .PP The \fB\-verify\fR option should really exit if the server verification fails. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fIs_client\fR\|(1), \fIs_server\fR\|(1), \fIciphers\fR\|(1)