SYNOPSIS
openssl s_time
[
DESCRIPTION
The s_time 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.
OPTIONS
OPTIONS
-help -
Print out a usage message.
-connect host:port-
This specifies the host and optional port to connect to.
-www page-
This specifies the page to GET from the server. A value of '/' gets the index.html page. If this parameter is not specified, then this command will only perform the handshake to establish SSL connections but not transfer any payload data.
-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.
-key keyfile-
The private key to use. If not specified then the certificate file will be used. The file is in PEM format.
-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.
-new -
Performs the timing test using a new session ID for each connection. If neither
-new nor-reuse are specified, they are both on by default and executed in sequence. -reuse -
Performs the timing test using the same session ID; this can be used as a test that session caching is working. If neither -new nor
-reuse are specified, they are both on by default and executed in sequence. -bugs -
There are several known bugs in SSL and TLS implementations. Adding this option enables various workarounds.
-cipher cipherlist-
This allows the TLSv1.2 and below cipher list sent by the client to be modified. This list will be combined with any TLSv1.3 ciphersuites that have been configured. Although the server determines which cipher suite is used it should take the first supported cipher in the list sent by the client. See openssl ciphers for more information.
-ciphersuites val-
This allows the TLSv1.3 ciphersuites sent by the client to be modified. This list will be combined with any TLSv1.2 and below ciphersuites that have been configured. Although the server determines which cipher suite is used it should take the first supported cipher in the list sent by the client. See openssl ciphers for more information. The format for this list is a simple colon (":") separated list of TLSv1.3 ciphersuite names.
-time length-
Specifies how long (in seconds) this command should establish connections and optionally transfer payload data from a server. Server and client performance and the link speed determine how many connections it can establish.
-nameopt option-
This specifies how the subject or issuer names are displayed. See openssl namedisplay-options for details.
-CAfile file-no-CAfile -CApath dir-no-CApath -CAstore uri,-no-CAstore -
See Trusted Certificate Options in openssl verification-options for details.
-provider name-provider-path path-propquery propq-
See Provider Options in openssl for details.
-cafile file-
This is an obsolete synonym for -CAfile.
-ssl3 -tls1 -tls1_1 -tls1_2 -tls1_3 -
See TLS Version Options in openssl.
NOTES
s_time 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 ciphers command for details.
If the handshake fails then there are several possible causes, if it is
nothing obvious like no client certificate then the
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 s_client 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
If a certificate is specified on the command line using the
BUGS
Because this program does not have all the options of the s_client program to turn protocols on and off, you may not be able to measure the performance of all protocols with all servers.
The
HISTORY
The
COPYRIGHT
Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or here: OpenSSL.
AVAILABILITY
PTC MKS Toolkit for System Administrators
PTC MKS Toolkit for Developers
PTC MKS Toolkit for Interoperability
PTC MKS Toolkit for Professional Developers
PTC MKS Toolkit for Professional Developers 64-Bit Edition
PTC MKS Toolkit for Enterprise Developers
PTC MKS Toolkit for Enterprise Developers 64-Bit Edition
SEE ALSO
- Commands:
- openssl, openssl ciphers, openssl s_client, openssl s_server
PTC MKS Toolkit 10.5 Documentation Build 40.