B<openssl> B<s_server>
[B<-help>]
-[B<-port port>]
+[B<-port +int>]
[B<-accept val>]
-[B<-naccept count>]
[B<-unix val>]
-[B<-unlink>]
[B<-4>]
[B<-6>]
-[B<-context id>]
-[B<-verify depth>]
-[B<-Verify depth>]
-[B<-crl_check>]
-[B<-crl_check_all>]
-[B<-cert filename>]
-[B<-certform DER|PEM>]
-[B<-key keyfile>]
-[B<-keyform DER|PEM>]
-[B<-pass arg>]
-[B<-dcert filename>]
-[B<-dcertform DER|PEM>]
-[B<-dkey keyfile>]
-[B<-dkeyform DER|PEM>]
-[B<-dpass arg>]
-[B<-dhparam filename>]
-[B<-nbio>]
+[B<-unlink>]
+[B<-context val>]
+[B<-verify int>]
+[B<-Verify int>]
+[B<-cert infile>]
+[B<-nameopt val>]
+[B<-naccept +int>]
+[B<-serverinfo val>]
+[B<-certform PEM|DER>]
+[B<-key infile>]
+[B<-keyform format>]
+[B<-pass val>]
+[B<-dcert infile>]
+[B<-dcertform PEM|DER>]
+[B<-dkey infile>]
+[B<-dkeyform PEM|DER>]
+[B<-dpass val>]
[B<-nbio_test>]
[B<-crlf>]
[B<-debug>]
[B<-msg>]
+[B<-msgfile outfile>]
[B<-state>]
-[B<-CApath directory>]
-[B<-CAfile filename>]
+[B<-CAfile infile>]
+[B<-CApath dir>]
[B<-no-CAfile>]
[B<-no-CApath>]
-[B<-attime timestamp>]
-[B<-check_ss_sig>]
-[B<-explicit_policy>]
-[B<-extended_crl>]
+[B<-nocert>]
+[B<-quiet>]
+[B<-no_resume_ephemeral>]
+[B<-www>]
+[B<-WWW>]
+[B<-servername>]
+[B<-servername_fatal>]
+[B<-cert2 infile>]
+[B<-key2 infile>]
+[B<-tlsextdebug>]
+[B<-HTTP>]
+[B<-id_prefix val>]
+[B<-rand val>]
+[B<-keymatexport val>]
+[B<-keymatexportlen +int>]
+[B<-CRL infile>]
+[B<-crl_download>]
+[B<-cert_chain infile>]
+[B<-dcert_chain infile>]
+[B<-chainCApath dir>]
+[B<-verifyCApath dir>]
+[B<-no_cache>]
+[B<-ext_cache>]
+[B<-CRLform PEM|DER>]
+[B<-verify_return_error>]
+[B<-verify_quiet>]
+[B<-build_chain>]
+[B<-chainCAfile infile>]
+[B<-verifyCAfile infile>]
+[B<-ign_eof>]
+[B<-no_ign_eof>]
+[B<-status>]
+[B<-status_verbose>]
+[B<-status_timeout int>]
+[B<-status_url val>]
+[B<-status_file infile>]
+[B<-trace>]
+[B<-security_debug>]
+[B<-security_debug_verbose>]
+[B<-brief>]
+[B<-rev>]
+[B<-async>]
+[B<-ssl_config val>]
+[B<-max_send_frag +int>]
+[B<-split_send_frag +int>]
+[B<-max_pipelines +int>]
+[B<-read_buf +int>]
+[B<-no_ssl3>]
+[B<-no_tls1>]
+[B<-no_tls1_1>]
+[B<-no_tls1_2>]
+[B<-no_tls1_3>]
+[B<-bugs>]
+[B<-no_comp>]
+[B<-comp>]
+[B<-no_ticket>]
+[B<-serverpref>]
+[B<-legacy_renegotiation>]
+[B<-no_renegotiation>]
+[B<-legacy_server_connect>]
+[B<-no_resumption_on_reneg>]
+[B<-no_legacy_server_connect>]
+[B<-strict>]
+[B<-sigalgs val>]
+[B<-client_sigalgs val>]
+[B<-groups val>]
+[B<-curves val>]
+[B<-named_curve val>]
+[B<-cipher val>]
+[B<-dhparam infile>]
+[B<-record_padding val>]
+[B<-debug_broken_protocol>]
+[B<-policy val>]
+[B<-purpose val>]
+[B<-verify_name val>]
+[B<-verify_depth int>]
+[B<-auth_level int>]
+[B<-attime intmax>]
+[B<-verify_hostname val>]
+[B<-verify_email val>]
+[B<-verify_ip>]
[B<-ignore_critical>]
+[B<-issuer_checks>]
+[B<-crl_check>]
+[B<-crl_check_all>]
+[B<-policy_check>]
+[B<-explicit_policy>]
[B<-inhibit_any>]
[B<-inhibit_map>]
-[B<-no_check_time>]
-[B<-partial_chain>]
-[B<-policy arg>]
-[B<-policy_check>]
+[B<-x509_strict>]
+[B<-extended_crl>]
+[B<-use_deltas>]
[B<-policy_print>]
-[B<-purpose purpose>]
-[B<-suiteB_128>]
+[B<-check_ss_sig>]
+[B<-trusted_first>]
[B<-suiteB_128_only>]
+[B<-suiteB_128>]
[B<-suiteB_192>]
-[B<-trusted_first>]
+[B<-partial_chain>]
[B<-no_alt_chains>]
-[B<-use_deltas>]
-[B<-auth_level num>]
-[B<-verify_depth num>]
-[B<-verify_return_error>]
-[B<-verify_email email>]
-[B<-verify_hostname hostname>]
-[B<-verify_ip ip>]
-[B<-verify_name name>]
-[B<-x509_strict>]
-[B<-nocert>]
-[B<-cipher cipherlist>]
-[B<-serverpref>]
-[B<-quiet>]
+[B<-no_check_time>]
+[B<-allow_proxy_certs>]
+[B<-xkey>]
+[B<-xcert>]
+[B<-xchain>]
+[B<-xchain_build>]
+[B<-xcertform PEM|DER>]
+[B<-xkeyform PEM|DER>]
+[B<-nbio>]
+[B<-psk_identity val>]
+[B<-psk_hint val>]
+[B<-psk val>]
+[B<-srpvfile infile>]
+[B<-srpuserseed val>]
[B<-ssl3>]
[B<-tls1>]
[B<-tls1_1>]
[B<-tls1_2>]
[B<-tls1_3>]
[B<-dtls>]
+[B<-timeout>]
+[B<-mtu +int>]
+[B<-listen>]
[B<-dtls1>]
[B<-dtls1_2>]
-[B<-listen>]
-[B<-async>]
-[B<-split_send_frag>]
-[B<-max_pipelines>]
-[B<-read_buf>]
-[B<-no_ssl3>]
-[B<-no_tls1>]
-[B<-no_tls1_1>]
-[B<-no_tls1_2>]
-[B<-no_tls1_3>]
+[B<-sctp>]
[B<-no_dhe>]
-[B<-bugs>]
-[B<-comp>]
-[B<-no_comp>]
-[B<-brief>]
-[B<-www>]
-[B<-WWW>]
-[B<-HTTP>]
-[B<-engine id>]
-[B<-tlsextdebug>]
-[B<-no_ticket>]
-[B<-id_prefix arg>]
-[B<-rand file(s)>]
-[B<-serverinfo file>]
-[B<-no_resumption_on_reneg>]
-[B<-status>]
-[B<-status_verbose>]
-[B<-status_timeout nsec>]
-[B<-status_url url>]
-[B<-status_file file>]
-[B<-alpn protocols>]
-[B<-nextprotoneg protocols>]
+[B<-nextprotoneg val>]
+[B<-use_srtp val>]
+[B<-alpn val>]
+[B<-engine val>]
+[B<-keylogfile outfile>]
+[B<-max_early_data int>]
+[B<-early_data>]
=head1 DESCRIPTION
Print out a usage message.
-=item B<-port port>
+=item B<-port +int>
The TCP port to listen on for connections. If not specified 4433 is used.
The optional TCP host and port to listen on for connections. If not specified, *:4433 is used.
-=item B<-naccept count>
-
-The server will exit after receiving B<number> connections, default unlimited.
-
=item B<-unix val>
Unix domain socket to accept on.
-=item B<-unlink>
-
-For -unix, unlink existing socket first.
-
=item B<-4>
Use IPv4 only.
Use IPv6 only.
-=item B<-context id>
+=item B<-unlink>
+
+For -unix, unlink any existing socket first.
+
+=item B<-context val>
Sets the SSL context id. It can be given any string value. If this option
is not present a default value will be used.
-=item B<-cert certname>
+=item B<-verify int>, B<-Verify int>
+
+The verify depth to use. This specifies the maximum length of the
+client certificate chain and makes the server request a certificate from
+the client. With the B<-verify> option a certificate is requested but the
+client does not have to send one, with the B<-Verify> option the client
+must supply a certificate or an error occurs.
+
+If the cipher suite cannot request a client certificate (for example an
+anonymous cipher suite or PSK) this option has no effect.
+
+=item B<-cert infile>
The certificate to use, most servers cipher suites require the use of a
certificate and some require a certificate with a certain public key type:
for example the DSS cipher suites require a certificate containing a DSS
(DSA) key. If not specified then the filename "server.pem" will be used.
-=item B<-certform format>
+=item B<-nameopt val>
+
+Option which determines how the subject or issuer names are displayed. The
+B<val> argument can be a single option or multiple options separated by
+commas. Alternatively the B<-nameopt> switch may be used more than once to
+set multiple options. See the L<x509(1)> manual page for details.
+
+=item B<-naccept +int>
+
+The server will exit after receiving the specified number of connections,
+default unlimited.
+
+=item B<-serverinfo val>
+
+A file containing one or more blocks of PEM data. Each PEM block
+must encode a TLS ServerHello extension (2 bytes type, 2 bytes length,
+followed by "length" bytes of extension data). If the client sends
+an empty TLS ClientHello extension matching the type, the corresponding
+ServerHello extension will be returned.
+
+=item B<-certform PEM|DER>
The certificate format to use: DER or PEM. PEM is the default.
-=item B<-key keyfile>
+=item B<-key infile>
The private key to use. If not specified then the certificate file will
be used.
The private format to use: DER or PEM. PEM is the default.
-=item B<-pass arg>
+=item B<-pass val>
-The private key password source. For more information about the format of B<arg>
+The private key password source. For more information about the format of B<val>
see the B<PASS PHRASE ARGUMENTS> section in L<openssl(1)>.
-=item B<-dcert filename>, B<-dkey keyname>
+=item B<-dcert infile>, B<-dkey infile>
Specify an additional certificate and private key, these behave in the
same manner as the B<-cert> and B<-key> options except there is no default
a server can support clients which only support RSA or DSS cipher suites
by using an appropriate certificate.
-=item B<-dcertform format>, B<-dkeyform format>, B<-dpass arg>
+=item B<-dcertform PEM|DER>, B<-dkeyform PEM|DER>, B<-dpass val>
Additional certificate and private key format and passphrase respectively.
-=item B<-nocert>
+=item B<-nbio_test>
-If this option is set then no certificate is used. This restricts the
-cipher suites available to the anonymous ones (currently just anonymous
-DH).
+Tests non blocking I/O.
-=item B<-dhparam filename>
+=item B<-crlf>
-The DH parameter file to use. The ephemeral DH cipher suites generate keys
-using a set of DH parameters. If not specified then an attempt is made to
-load the parameters from the server certificate file.
-If this fails then a static set of parameters hard coded into the B<s_server>
-program will be used.
+This option translated a line feed from the terminal into CR+LF.
-=item B<-no_dhe>
+=item B<-debug>
-If this option is set then no DH parameters will be loaded effectively
-disabling the ephemeral DH cipher suites.
+Print extensive debugging information including a hex dump of all traffic.
-=item B<-crl_check>, B<-crl_check_all>
+=item B<-msg>
-Check the peer certificate has not been revoked by its CA.
-The CRL(s) are appended to the certificate file. With the B<-crl_check_all>
-option all CRLs of all CAs in the chain are checked.
+Show all protocol messages with hex dump.
-=item B<-CApath directory>
+=item B<-msgfile outfile>
-The directory to use for client certificate verification. This directory
-must be in "hash format", see B<verify> for more information. These are
-also used when building the server certificate chain.
+File to send output of B<-msg> or B<-trace> to, default standard output.
+
+=item B<-state>
+
+Prints the SSL session states.
-=item B<-CAfile file>
+=item B<-CAfile infile>
A file containing trusted certificates to use during client authentication
and to use when attempting to build the server certificate chain. The list
is also used in the list of acceptable client CAs passed to the client when
a certificate is requested.
+=item B<-CApath dir>
+
+The directory to use for client certificate verification. This directory
+must be in "hash format", see B<verify> for more information. These are
+also used when building the server certificate chain.
+
=item B<-no-CAfile>
-Do not load the trusted CA certificates from the default file location
+Do not load the trusted CA certificates from the default file location.
=item B<-no-CApath>
-Do not load the trusted CA certificates from the default directory location
-
-=item B<-verify depth>, B<-Verify depth>
+Do not load the trusted CA certificates from the default directory location.
-The verify depth to use. This specifies the maximum length of the
-client certificate chain and makes the server request a certificate from
-the client. With the B<-verify> option a certificate is requested but the
-client does not have to send one, with the B<-Verify> option the client
-must supply a certificate or an error occurs.
+=item B<-nocert>
-If the ciphersuite cannot request a client certificate (for example an
-anonymous ciphersuite or PSK) this option has no effect.
+If this option is set then no certificate is used. This restricts the
+cipher suites available to the anonymous ones (currently just anonymous
+DH).
-=item B<-attime>, B<-check_ss_sig>, B<-crl_check>, B<-crl_check_all>,
-B<-explicit_policy>, B<-extended_crl>, B<-ignore_critical>, B<-inhibit_any>,
-B<-inhibit_map>, B<-no_alt_chains>, B<-no_check_time>, B<-partial_chain>, B<-policy>,
-B<-policy_check>, B<-policy_print>, B<-purpose>, B<-suiteB_128>,
-B<-suiteB_128_only>, B<-suiteB_192>, B<-trusted_first>, B<-use_deltas>,
-B<-auth_level>, B<-verify_depth>, B<-verify_email>, B<-verify_hostname>,
-B<-verify_ip>, B<-verify_name>, B<-x509_strict>
+=item B<-quiet>
-Set different peer certificate verification options.
-See the L<verify(1)> manual page for details.
+Inhibit printing of session and certificate information.
-=item B<-verify_return_error>
+=item B<-www>
-Verification errors normally just print a message but allow the
-connection to continue, for debugging purposes.
-If this option is used, then verification errors close the connection.
+Sends a status message back to the client when it connects. This includes
+information about the ciphers used and various session parameters.
+The output is in HTML format so this option will normally be used with a
+web browser.
-=item B<-state>
+=item B<-WWW>
-Prints the SSL session states.
+Emulates a simple web server. Pages will be resolved relative to the
+current directory, for example if the URL https://myhost/page.html is
+requested the file ./page.html will be loaded.
-=item B<-debug>
+=item B<-tlsextdebug>
-Print extensive debugging information including a hex dump of all traffic.
+Print a hex dump of any TLS extensions received from the server.
-=item B<-msg>
+=item B<-HTTP>
-Show all protocol messages with hex dump.
+Emulates a simple web server. Pages will be resolved relative to the
+current directory, for example if the URL https://myhost/page.html is
+requested the file ./page.html will be loaded. The files loaded are
+assumed to contain a complete and correct HTTP response (lines that
+are part of the HTTP response line and headers must end with CRLF).
-=item B<-trace>
+=item B<-id_prefix val>
-Show verbose trace output of protocol messages. OpenSSL needs to be compiled
-with B<enable-ssl-trace> for this option to work.
+Generate SSL/TLS session IDs prefixed by B<val>. This is mostly useful
+for testing any SSL/TLS code (eg. proxies) that wish to deal with multiple
+servers, when each of which might be generating a unique range of session
+IDs (eg. with a certain prefix).
-=item B<-msgfile>
+=item B<-rand val>
-File to send output of B<-msg> or B<-trace> to, default standard output.
+A file or files containing random data used to seed the random number
+generator, or an EGD socket (see L<RAND_egd(3)>).
+Multiple files can be specified separated by an OS-dependent character.
+The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for
+all others.
-=item B<-nbio_test>
+=item B<-verify_return_error>
-Tests non blocking I/O
+Verification errors normally just print a message but allow the
+connection to continue, for debugging purposes.
+If this option is used, then verification errors close the connection.
-=item B<-nbio>
+=item B<-status>
-Turns on non blocking I/O
+Enables certificate status request support (aka OCSP stapling).
-=item B<-crlf>
+=item B<-status_verbose>
-This option translated a line feed from the terminal into CR+LF.
+Enables certificate status request support (aka OCSP stapling) and gives
+a verbose printout of the OCSP response.
-=item B<-quiet>
+=item B<-status_timeout int>
-Inhibit printing of session and certificate information.
+Sets the timeout for OCSP response to B<int> seconds.
-=item B<-psk_hint hint>
+=item B<-status_url val>
-Use the PSK identity hint B<hint> when using a PSK cipher suite.
+Sets a fallback responder URL to use if no responder URL is present in the
+server certificate. Without this option an error is returned if the server
+certificate does not contain a responder address.
-=item B<-psk key>
+=item B<-status_file infile>
-Use the PSK key B<key> when using a PSK cipher suite. The key is
-given as a hexadecimal number without leading 0x, for example -psk
-1a2b3c4d.
+Overrides any OCSP responder URLs from the certificate and always provides the
+OCSP Response stored in the file. The file must be in DER format.
-=item B<-ssl2>, B<-ssl3>, B<-tls1>, B<-tls1_1>, B<-tls1_2>, B<-tls1_3>, B<-no_ssl2>, B<-no_ssl3>, B<-no_tls1>, B<-no_tls1_1>, B<-no_tls1_2>, B<-no_tls1_3>
+=item B<-trace>
-These options require or disable the use of the specified SSL or TLS protocols.
-By default B<s_server> will negotiate the highest mutually supported protocol
-version.
-When a specific TLS version is required, only that version will be accepted
-from the client.
+Show verbose trace output of protocol messages. OpenSSL needs to be compiled
+with B<enable-ssl-trace> for this option to work.
-=item B<-dtls>, B<-dtls1>, B<-dtls1_2>
+=item B<-brief>
-These options make B<s_server> use DTLS protocols instead of TLS.
-With B<-dtls>, B<s_server> will negotiate any supported DTLS protocol version,
-whilst B<-dtls1> and B<-dtls1_2> will only support DTLSv1.0 and DTLSv1.2
-respectively.
+Provide a brief summary of connection parameters instead of the normal verbose
+output.
-=item B<-listen>
+=item B<-rev>
-This option can only be used in conjunction with one of the DTLS options above.
-With this option B<s_server> will listen on a UDP port for incoming connections.
-Any ClientHellos that arrive will be checked to see if they have a cookie in
-them or not.
-Any without a cookie will be responded to with a HelloVerifyRequest.
-If a ClientHello with a cookie is received then B<s_server> will connect to
-that peer and complete the handshake.
+Simple test server which just reverses the text received from the client
+and sends it back to the server. Also sets B<-brief>.
=item B<-async>
is also used via the B<-engine> option. For test purposes the dummy async engine
(dasync) can be used (if available).
-=item B<-split_send_frag int>
+=item B<-max_send_frag +int>
+
+The maximum size of data fragment to send.
+See L<SSL_CTX_set_max_send_fragment(3)> for further information.
+
+=item B<-split_send_frag +int>
The size used to split data for encrypt pipelines. If more data is written in
one go than this value then it will be split into multiple pipelines, up to the
maximum number of pipelines defined by max_pipelines. This only has an effect if
-a suitable ciphersuite has been negotiated, an engine that supports pipelining
+a suitable cipher suite has been negotiated, an engine that supports pipelining
has been loaded, and max_pipelines is greater than 1. See
L<SSL_CTX_set_split_send_fragment(3)> for further information.
-=item B<-max_pipelines int>
+=item B<-max_pipelines +int>
The maximum number of encrypt/decrypt pipelines to be used. This will only have
an effect if an engine has been loaded that supports pipelining (e.g. the dasync
-engine) and a suitable ciphersuite has been negotiated. The default value is 1.
+engine) and a suitable cipher suite has been negotiated. The default value is 1.
See L<SSL_CTX_set_max_pipelines(3)> for further information.
-=item B<-read_buf int>
+=item B<-read_buf +int>
The default read buffer size to be used for connections. This will only have an
effect if the buffer size is larger than the size that would otherwise be used
and pipelining is in use (see L<SSL_CTX_set_default_read_buffer_len(3)> for
further information).
+=item B<-ssl2>, B<-ssl3>, B<-tls1>, B<-tls1_1>, B<-tls1_2>, B<-tls1_3>, B<-no_ssl2>, B<-no_ssl3>, B<-no_tls1>, B<-no_tls1_1>, B<-no_tls1_2>, B<-no_tls1_3>
+
+These options require or disable the use of the specified SSL or TLS protocols.
+By default B<s_server> will negotiate the highest mutually supported protocol
+version.
+When a specific TLS version is required, only that version will be accepted
+from the client.
+
=item B<-bugs>
There are several known bug in SSL and TLS implementations. Adding this
option enables various workarounds.
+=item B<-no_comp>
+
+Disable negotiation of TLS compression.
+TLS compression is not recommended and is off by default as of
+OpenSSL 1.1.0.
+
=item B<-comp>
Enable negotiation of TLS compression.
TLS compression is not recommended and is off by default as of
OpenSSL 1.1.0.
-=item B<-no_comp>
+=item B<-no_ticket>
-Disable negotiation of TLS compression.
-TLS compression is not recommended and is off by default as of
-OpenSSL 1.1.0.
+Disable RFC4507bis session ticket support.
-=item B<-brief>
+=item B<-serverpref>
-Provide a brief summary of connection parameters instead of the normal verbose
-output.
+Use the server's cipher preferences, rather than the client's preferences.
+
+=item B<-no_resumption_on_reneg>
-=item B<-cipher cipherlist>
+Set the B<SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION> option.
+
+=item B<-client_sigalgs val>
+
+Signature algorithms to support for client certificate authentication
+(colon-separated list).
+
+=item B<-named_curve val>
+
+Specifies the elliptic curve to use. NOTE: this is single curve, not a list.
+For a list of all possible curves, use:
+
+ $ openssl ecparam -list_curves
+
+=item B<-cipher val>
This allows the cipher list used by the server to be modified. When
the client sends a list of supported ciphers the first client cipher
the preference order, the order of the server cipherlist irrelevant. See
the B<ciphers> command for more information.
-=item B<-serverpref>
-
-Use the server's cipher preferences, rather than the client's preferences.
-
-=item B<-tlsextdebug>
+=item B<-dhparam infile>
-Print a hex dump of any TLS extensions received from the server.
-
-=item B<-no_ticket>
-
-Disable RFC4507bis session ticket support.
+The DH parameter file to use. The ephemeral DH cipher suites generate keys
+using a set of DH parameters. If not specified then an attempt is made to
+load the parameters from the server certificate file.
+If this fails then a static set of parameters hard coded into the B<s_server>
+program will be used.
-=item B<-www>
+=item B<-attime>, B<-check_ss_sig>, B<-crl_check>, B<-crl_check_all>,
+B<-explicit_policy>, B<-extended_crl>, B<-ignore_critical>, B<-inhibit_any>,
+B<-inhibit_map>, B<-no_alt_chains>, B<-no_check_time>, B<-partial_chain>, B<-policy>,
+B<-policy_check>, B<-policy_print>, B<-purpose>, B<-suiteB_128>,
+B<-suiteB_128_only>, B<-suiteB_192>, B<-trusted_first>, B<-use_deltas>,
+B<-auth_level>, B<-verify_depth>, B<-verify_email>, B<-verify_hostname>,
+B<-verify_ip>, B<-verify_name>, B<-x509_strict>
-Sends a status message back to the client when it connects. This includes
-information about the ciphers used and various session parameters.
-The output is in HTML format so this option will normally be used with a
-web browser.
+Set different peer certificate verification options.
+See the L<verify(1)> manual page for details.
-=item B<-WWW>
+=item B<-crl_check>, B<-crl_check_all>
-Emulates a simple web server. Pages will be resolved relative to the
-current directory, for example if the URL https://myhost/page.html is
-requested the file ./page.html will be loaded.
+Check the peer certificate has not been revoked by its CA.
+The CRL(s) are appended to the certificate file. With the B<-crl_check_all>
+option all CRLs of all CAs in the chain are checked.
-=item B<-HTTP>
+=item B<-nbio>
-Emulates a simple web server. Pages will be resolved relative to the
-current directory, for example if the URL https://myhost/page.html is
-requested the file ./page.html will be loaded. The files loaded are
-assumed to contain a complete and correct HTTP response (lines that
-are part of the HTTP response line and headers must end with CRLF).
+Turns on non blocking I/O.
-=item B<-rev>
+=item B<-psk_identity val>
-Simple test server which just reverses the text received from the client
-and sends it back to the server. Also sets B<-brief>.
+Expect the client to send PSK identity B<val> when using a PSK
+cipher suite, and warn if they do not. By default, the expected PSK
+identity is the string "Client_identity".
-=item B<-engine id>
+=item B<-psk_hint val>
-Specifying an engine (by its unique B<id> string) will cause B<s_server>
-to attempt to obtain a functional reference to the specified engine,
-thus initialising it if needed. The engine will then be set as the default
-for all available algorithms.
+Use the PSK identity hint B<val> when using a PSK cipher suite.
-=item B<-id_prefix arg>
+=item B<-psk val>
-Generate SSL/TLS session IDs prefixed by B<arg>. This is mostly useful
-for testing any SSL/TLS code (eg. proxies) that wish to deal with multiple
-servers, when each of which might be generating a unique range of session
-IDs (eg. with a certain prefix).
+Use the PSK key B<val> when using a PSK cipher suite. The key is
+given as a hexadecimal number without leading 0x, for example -psk
+1a2b3c4d.
+This option must be provided in order to use a PSK cipher.
-=item B<-rand file(s)>
+=item B<-listen>
-A file or files containing random data used to seed the random number
-generator, or an EGD socket (see L<RAND_egd(3)>).
-Multiple files can be specified separated by an OS-dependent character.
-The separator is B<;> for MS-Windows, B<,> for OpenVMS, and B<:> for
-all others.
+This option can only be used in conjunction with one of the DTLS options above.
+With this option B<s_server> will listen on a UDP port for incoming connections.
+Any ClientHellos that arrive will be checked to see if they have a cookie in
+them or not.
+Any without a cookie will be responded to with a HelloVerifyRequest.
+If a ClientHello with a cookie is received then B<s_server> will connect to
+that peer and complete the handshake.
-=item B<-serverinfo file>
+=item B<-dtls>, B<-dtls1>, B<-dtls1_2>
-A file containing one or more blocks of PEM data. Each PEM block
-must encode a TLS ServerHello extension (2 bytes type, 2 bytes length,
-followed by "length" bytes of extension data). If the client sends
-an empty TLS ClientHello extension matching the type, the corresponding
-ServerHello extension will be returned.
+These options make B<s_server> use DTLS protocols instead of TLS.
+With B<-dtls>, B<s_server> will negotiate any supported DTLS protocol version,
+whilst B<-dtls1> and B<-dtls1_2> will only support DTLSv1.0 and DTLSv1.2
+respectively.
-=item B<-no_resumption_on_reneg>
+=item B<-sctp>
-Set the B<SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION> option.
+Use SCTP for the transport protocol instead of UDP in DTLS. Must be used in
+conjunction with B<-dtls>, B<-dtls1> or B<-dtls1_2>. This option is only
+available where OpenSSL has support for SCTP enabled.
-=item B<-status>
+=item B<-no_dhe>
-Enables certificate status request support (aka OCSP stapling).
+If this option is set then no DH parameters will be loaded effectively
+disabling the ephemeral DH cipher suites.
-=item B<-status_verbose>
+=item B<-alpn val>, B<-nextprotoneg val>
-Enables certificate status request support (aka OCSP stapling) and gives
-a verbose printout of the OCSP response.
+These flags enable the Enable the Application-Layer Protocol Negotiation
+or Next Protocol Negotiation (NPN) extension, respectively. ALPN is the
+IETF standard and replaces NPN.
+The B<val> list is a comma-separated list of supported protocol
+names. The list should contain the most desirable protocols first.
+Protocol names are printable ASCII strings, for example "http/1.1" or
+"spdy/3".
-=item B<-status_timeout nsec>
+=item B<-engine val>
-Sets the timeout for OCSP response to B<nsec> seconds.
+Specifying an engine (by its unique id string in B<val>) will cause B<s_server>
+to attempt to obtain a functional reference to the specified engine,
+thus initialising it if needed. The engine will then be set as the default
+for all available algorithms.
-=item B<-status_url url>
+=item B<-keylogfile outfile>
-Sets a fallback responder URL to use if no responder URL is present in the
-server certificate. Without this option an error is returned if the server
-certificate does not contain a responder address.
+Appends TLS secrets to the specified keylog file such that external programs
+(like Wireshark) can decrypt TLS connections.
-=item B<-status_file file>
+=item B<-max_early_data int>
-Overrides any OCSP responder URLs from the certificate and always provides the
-OCSP Response stored in the file. The file must be in DER format.
+Change the default maximum early data bytes that are specified for new sessions
+and any incoming early data (when used in conjunction with the B<-early_data>
+flag). The default value is approximately 16k. The argument must be an integer
+greater than or equal to 0.
-=item B<-alpn protocols>, B<-nextprotoneg protocols>
+=item B<-early_data>
-these flags enable the
-Enable the Application-Layer Protocol Negotiation or Next Protocol
-Negotiation extension, respectively. ALPN is the IETF standard and
-replaces NPN.
-The B<protocols> list is a
-comma-separated list of supported protocol names.
-The list should contain most wanted protocols first.
-Protocol names are printable ASCII strings, for example "http/1.1" or
-"spdy/3".
+Accept early data where possible.
=back
=item B<q>
-end the current SSL connection but still accept new connections.
+End the current SSL connection but still accept new connections.
=item B<Q>
-end the current SSL connection and exit.
+End the current SSL connection and exit.
=item B<r>
-renegotiate the SSL session.
+Renegotiate the SSL session.
=item B<R>
-renegotiate the SSL session and request a client certificate.
+Renegotiate the SSL session and request a client certificate.
=item B<P>
-send some plain text down the underlying TCP connection: this should
+Send some plain text down the underlying TCP connection: this should
cause the client to disconnect due to a protocol violation.
=item B<S>
-print out some session cache status information.
+Print out some session cache status information.
=back
=head1 SEE ALSO
-L<SSL_CONF_cmd(3)>,
-L<sess_id(1)>, L<s_client(1)>, L<ciphers(1)>
+L<SSL_CONF_cmd(3)>, L<sess_id(1)>, L<s_client(1)>, L<ciphers(1)>
+L<SSL_CTX_set_max_send_fragment(3)>, L<SSL_CTX_set_split_send_fragment(3)>
+L<SSL_CTX_set_max_pipelines(3)>
=head1 HISTORY
=head1 COPYRIGHT
-Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
projects / openssl.git / blobdiff