NAME
openssl-s_time - SSL/TLS performance timing program
SYNOPSIS
openssl s_time [-help] [-connect host:port] [-www page] [-cert filename] [-key filename] [-reuse] [-new] [-verify depth] [-time seconds] [-ssl3] [-tls1] [-tls1_1] [-tls1_2] [-tls1_3] [-bugs] [-cipher cipherlist] [-ciphersuites val] [-nameopt option] [-cafile file] [-CAfile file] [-no-CAfile] [-CApath dir] [-no-CApath] [-CAstore uri] [-no-CAstore] [-provider name] [-provider_path path]
DESCRIPTION
This 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
- -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 -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 -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 -CAfile file, -no-CAfile, -CApath dir, -no-CApath, -CAstore uri, -no-CAstore
See -provider name
- -provider_path path
See -cafile file
This is an obsolete synonym for -CAfile.
- -ssl3, -tls1, -tls1_1, -tls1_2, -tls1_3
See NOTES
This command 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 openssl-s_client(1) 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 -prexit option of BUGS
Because this program does not have all the options of the HISTORY
The -cafile option was deprecated in OpenSSL 3.0.
SEE ALSO
openssl-s_client(1), openssl-ciphers(1), COPYRIGHT
Copyright 2004-2020 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 at https://www.openssl.org/source/license.html.