1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
=pod
{- OpenSSL::safe::output_do_not_edit_headers(); -}
=head1 NAME
openssl-s_time - SSL/TLS performance timing program
=head1 SYNOPSIS
B<openssl> B<s_time>
[B<-help>]
[B<-connect> I<host>:I<port>]
[B<-www> I<page>]
[B<-cert> I<filename>]
[B<-key> I<filename>]
[B<-reuse>]
[B<-new>]
[B<-verify> I<depth>]
[B<-time> I<seconds>]
[B<-ssl3>]
[B<-tls1>]
[B<-tls1_1>]
[B<-tls1_2>]
[B<-tls1_3>]
[B<-bugs>]
[B<-cipher> I<cipherlist>]
[B<-ciphersuites> I<val>]
{- $OpenSSL::safe::opt_name_synopsis -}
[B<-cafile> I<file>]
{- $OpenSSL::safe::opt_trust_synopsis -}
{- $OpenSSL::safe::opt_provider_synopsis -}
=for openssl ifdef ssl3 tls1 tls1_1 tls1_2 tls1_3
=head1 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.
=head1 OPTIONS
=over 4
=item B<-help>
Print out a usage message.
=item B<-connect> I<host>:I<port>
This specifies the host and optional port to connect to.
=item B<-www> I<page>
This specifies the page to GET from the server. A value of '/' gets the
F<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.
=item B<-cert> I<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> I<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> I<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<-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<-bugs>
There are several known bugs in SSL and TLS implementations. Adding this
option enables various workarounds.
=item B<-cipher> I<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
L<openssl-ciphers(1)> for more information.
=item B<-ciphersuites> I<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
L<openssl-ciphers(1)> for more information. The format for this list is a
simple colon (":") separated list of TLSv1.3 ciphersuite names.
=item B<-time> I<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.
{- $OpenSSL::safe::opt_name_item -}
{- $OpenSSL::safe::opt_trust_item -}
{- $OpenSSL::safe::opt_provider_item -}
=item B<-cafile> I<file>
This is an obsolete synonym for B<-CAfile>.
=item B<-ssl3>, B<-tls1>, B<-tls1_1>, B<-tls1_2>, B<-tls1_3>
See L<openssl(1)/TLS Version Options>.
=back
=head1 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). I<commoncipher> is a cipher to
which both client and server can agree, see the L<openssl-ciphers(1)> 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> and
B<-ssl3> options can be tried
in case it is a buggy server. In particular you should play with these
options B<before> 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<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 B<-prexit> option of L<openssl-s_client(1)> 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<openssl-s_client(1)> 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 HISTORY
The B<-cafile> option was deprecated in OpenSSL 3.0.
=head1 SEE ALSO
L<openssl(1)>,
L<openssl-s_client(1)>,
L<openssl-s_server(1)>,
L<openssl-ciphers(1)>,
L<ossl_store-file(7)>
=head1 COPYRIGHT
Copyright 2004-2019 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
L<https://www.openssl.org/source/license.html>.
=cut
|
