2 {- OpenSSL::safe::output_do_not_edit_headers(); -}
6 openssl-s_server - SSL/TLS server program
10 B<openssl> B<s_server>
23 [B<-certform> B<DER>|B<PEM>|B<P12>]
24 [B<-cert_chain> I<infile>]
26 [B<-serverinfo> I<val>]
27 [B<-key> I<filename>|I<uri>]
28 [B<-key2> I<filename>|I<uri>]
29 [B<-keyform> B<DER>|B<PEM>|B<P12>|B<ENGINE>]
32 [B<-dcertform> B<DER>|B<PEM>|B<P12>]
33 [B<-dcert_chain> I<infile>]
34 [B<-dkey> I<filename>|I<uri>]
35 [B<-dkeyform> B<DER>|B<PEM>|B<P12>|B<ENGINE>]
41 [B<-msgfile> I<outfile>]
45 [B<-no_resume_ephemeral>]
48 [B<-http_server_binmode>]
50 [B<-ignore_unexpected_eof>]
52 [B<-servername_fatal>]
55 [B<-id_prefix> I<val>]
56 [B<-keymatexport> I<val>]
57 [B<-keymatexportlen> I<+int>]
59 [B<-CRLform> B<DER>|B<PEM>]
61 [B<-chainCAfile> I<infile>]
62 [B<-chainCApath> I<dir>]
63 [B<-chainCAstore> I<uri>]
64 [B<-verifyCAfile> I<infile>]
65 [B<-verifyCApath> I<dir>]
66 [B<-verifyCAstore> I<uri>]
69 [B<-verify_return_error>]
75 [B<-status_timeout> I<int>]
76 [B<-status_url> I<val>]
77 [B<-status_file> I<infile>]
80 [B<-security_debug_verbose>]
84 [B<-ssl_config> I<val>]
85 [B<-max_send_frag> I<+int>]
86 [B<-split_send_frag> I<+int>]
87 [B<-max_pipelines> I<+int>]
89 [B<-read_buf> I<+int>]
95 [B<-legacy_renegotiation>]
96 [B<-no_renegotiation>]
97 [B<-legacy_server_connect>]
98 [B<-no_resumption_on_reneg>]
99 [B<-no_legacy_server_connect>]
100 [B<-allow_no_dhe_kex>]
101 [B<-prioritize_chacha>]
104 [B<-client_sigalgs> I<val>]
107 [B<-named_curve> I<val>]
109 [B<-ciphersuites> I<val>]
110 [B<-dhparam> I<infile>]
111 [B<-record_padding> I<val>]
112 [B<-debug_broken_protocol>]
114 [B<-psk_identity> I<val>]
115 [B<-psk_hint> I<val>]
117 [B<-psk_session> I<file>]
118 [B<-srpvfile> I<infile>]
119 [B<-srpuserseed> I<val>]
126 [B<-nextprotoneg> I<val>]
127 [B<-use_srtp> I<val>]
130 [B<-keylogfile> I<outfile>]
131 [B<-recv_max_early_data> I<int>]
132 [B<-max_early_data> I<int>]
138 {- $OpenSSL::safe::opt_name_synopsis -}
139 {- $OpenSSL::safe::opt_version_synopsis -}
140 {- $OpenSSL::safe::opt_v_synopsis -}
141 {- $OpenSSL::safe::opt_s_synopsis -}
142 {- $OpenSSL::safe::opt_x_synopsis -}
143 {- $OpenSSL::safe::opt_trust_synopsis -}
144 {- $OpenSSL::safe::opt_r_synopsis -}
145 {- $OpenSSL::safe::opt_engine_synopsis -}{- $OpenSSL::safe::opt_provider_synopsis -}
147 =for openssl ifdef unix 4 6 unlink no_dhe nextprotoneg use_srtp engine
149 =for openssl ifdef status status_verbose status_timeout status_url status_file
151 =for openssl ifdef psk_hint srpvfile srpuserseed sctp sctp_label_bug
153 =for openssl ifdef sctp sctp_label_bug trace mtu timeout listen
155 =for openssl ifdef ssl3 tls1 tls1_1 tls1_2 tls1_3 dtls mtu dtls1 dtls1_2
157 =for openssl ifdef sendfile
161 This command implements a generic SSL/TLS server which
162 listens for connections on a given port using SSL/TLS.
166 In addition to the options below, this command also supports
167 the common and server only options documented
168 L<SSL_CONF_cmd(3)/Supported Command Line Commands>
174 Print out a usage message.
176 =item B<-port> I<+int>
178 The TCP port to listen on for connections. If not specified 4433 is used.
180 =item B<-accept> I<val>
182 The optional TCP host and port to listen on for connections. If not specified, *:4433 is used.
184 =item B<-unix> I<val>
186 Unix domain socket to accept on.
198 For -unix, unlink any existing socket first.
200 =item B<-context> I<val>
202 Sets the SSL context id. It can be given any string value. If this option
203 is not present a default value will be used.
205 =item B<-verify> I<int>, B<-Verify> I<int>
207 The verify depth to use. This specifies the maximum length of the
208 client certificate chain and makes the server request a certificate from
209 the client. With the B<-verify> option a certificate is requested but the
210 client does not have to send one, with the B<-Verify> option the client
211 must supply a certificate or an error occurs.
213 If the cipher suite cannot request a client certificate (for example an
214 anonymous cipher suite or PSK) this option has no effect.
216 =item B<-cert> I<infile>
218 The certificate to use, most servers cipher suites require the use of a
219 certificate and some require a certificate with a certain public key type:
220 for example the DSS cipher suites require a certificate containing a DSS
221 (DSA) key. If not specified then the filename F<server.pem> will be used.
223 =item B<-cert2> I<infile>
225 The certificate file to use for servername; default is C<server2.pem>.
227 =item B<-certform> B<DER>|B<PEM>|B<P12>
229 The server certificate file format.
230 This option has no effect and is retained for backward compatibility only.
234 A file or URI of untrusted certificates to use when attempting to build the
235 certificate chain related to the certificate specified via the B<-cert> option.
236 The input can be in PEM, DER, or PKCS#12 format.
238 =item B<-build_chain>
240 Specify whether the application should build the server certificate chain to be
241 provided to the client.
243 =item B<-serverinfo> I<val>
245 A file containing one or more blocks of PEM data. Each PEM block
246 must encode a TLS ServerHello extension (2 bytes type, 2 bytes length,
247 followed by "length" bytes of extension data). If the client sends
248 an empty TLS ClientHello extension matching the type, the corresponding
249 ServerHello extension will be returned.
251 =item B<-key> I<filename>|I<uri>
253 The private key to use. If not specified then the certificate file will
256 =item B<-key2> I<filename>|I<uri>
258 The private Key file to use for servername if not given via B<-cert2>.
260 =item B<-keyform> B<DER>|B<PEM>|B<P12>|B<ENGINE>
262 The key format; the default is B<PEM>.
263 The only value with effect is B<ENGINE>; all others have become obsolete.
264 See L<openssl-format-options(1)> for details.
266 =item B<-pass> I<val>
268 The private key and certificate file password source.
269 For more information about the format of I<val>,
270 see L<openssl-passphrase-options(1)>.
272 =item B<-dcert> I<infile>, B<-dkey> I<filename>|I<uri>
274 Specify an additional certificate and private key, these behave in the
275 same manner as the B<-cert> and B<-key> options except there is no default
276 if they are not specified (no additional certificate and key is used). As
277 noted above some cipher suites require a certificate containing a key of
278 a certain type. Some cipher suites need a certificate carrying an RSA key
279 and some a DSS (DSA) key. By using RSA and DSS certificates and keys
280 a server can support clients which only support RSA or DSS cipher suites
281 by using an appropriate certificate.
283 =item B<-dcert_chain>
285 A file or URI of untrusted certificates to use when attempting to build the
286 server certificate chain when a certificate specified via the B<-dcert> option
288 The input can be in PEM, DER, or PKCS#12 format.
290 =item B<-dcertform> B<DER>|B<PEM>|B<P12>
292 The format of the additional certificate file.
293 This option has no effect and is retained for backward compatibility only.
295 =item B<-dkeyform> B<DER>|B<PEM>|B<P12>|B<ENGINE>
297 The format of the additional private key; the default is B<PEM>.
298 The only value with effect is B<ENGINE>; all others have become obsolete.
299 See L<openssl-format-options(1)>.
301 =item B<-dpass> I<val>
303 The passphrase for the additional private key and certificate.
304 For more information about the format of I<val>,
305 see L<openssl-passphrase-options(1)>.
309 Tests non blocking I/O.
313 This option translated a line feed from the terminal into CR+LF.
317 Print extensive debugging information including a hex dump of all traffic.
321 Show all protocol messages with hex dump.
323 =item B<-msgfile> I<outfile>
325 File to send output of B<-msg> or B<-trace> to, default standard output.
329 Prints the SSL session states.
331 =item B<-CRL> I<infile>
335 =item B<-CRLform> B<DER>|B<PEM>
337 The CRL file format; the default is B<PEM>.
338 See L<openssl-format-options(1)> for details.
340 =item B<-crl_download>
342 Download CRLs from distribution points given in CDP extensions of certificates
344 =item B<-verifyCAfile> I<filename>
346 A file in PEM format CA containing trusted certificates to use
347 for verifying client certificates.
349 =item B<-verifyCApath> I<dir>
351 A directory containing trusted certificates to use
352 for verifying client certificates.
353 This directory must be in "hash format",
354 see L<openssl-verify(1)> for more information.
356 =item B<-verifyCAstore> I<uri>
358 The URI of a store containing trusted certificates to use
359 for verifying client certificates.
361 =item B<-chainCAfile> I<file>
363 A file in PEM format containing trusted certificates to use
364 when attempting to build the server certificate chain.
366 =item B<-chainCApath> I<dir>
368 A directory containing trusted certificates to use
369 for building the server certificate chain provided to the client.
370 This directory must be in "hash format",
371 see L<openssl-verify(1)> for more information.
373 =item B<-chainCAstore> I<uri>
375 The URI of a store containing trusted certificates to use
376 for building the server certificate chain provided to the client.
377 The URI may indicate a single certificate, as well as a collection of them.
378 With URIs in the C<file:> scheme, this acts as B<-chainCAfile> or
379 B<-chainCApath>, depending on if the URI indicates a directory or a
381 See L<ossl_store-file(7)> for more information on the C<file:> scheme.
385 If this option is set then no certificate is used. This restricts the
386 cipher suites available to the anonymous ones (currently just anonymous
391 Inhibit printing of session and certificate information.
393 =item B<-tlsextdebug>
395 Print a hex dump of any TLS extensions received from the server.
399 Sends a status message back to the client when it connects. This includes
400 information about the ciphers used and various session parameters.
401 The output is in HTML format so this option can be used with a web browser.
402 The special URL C</renegcert> turns on client cert validation, and C</reneg>
403 tells the server to request renegotiation.
404 The B<-early_data> option cannot be used with this option.
406 =item B<-WWW>, B<-HTTP>
408 Emulates a simple web server. Pages will be resolved relative to the
409 current directory, for example if the URL C<https://myhost/page.html> is
410 requested the file F<./page.html> will be sent.
411 If the B<-HTTP> flag is used, the files are sent directly, and should contain
412 any HTTP response headers (including status response line).
413 If the B<-WWW> option is used,
414 the response headers are generated by the server, and the file extension is
415 examined to determine the B<Content-Type> header.
416 Extensions of C<html>, C<htm>, and C<php> are C<text/html> and all others are
418 In addition, the special URL C</stats> will return status
419 information like the B<-www> option.
420 Neither of these options can be used in conjunction with B<-early_data>.
422 =item B<-http_server_binmode>
424 When acting as web-server (using option B<-WWW> or B<-HTTP>) open files requested
425 by the client in binary mode.
427 =item B<-no_ca_names>
429 Disable TLS Extension CA Names. You may want to disable it for security reasons
430 or for compatibility with some Windows TLS implementations crashing when this
431 extension is larger than 1024 bytes.
433 =item B<-ignore_unexpected_eof>
435 Some TLS implementations do not send the mandatory close_notify alert on
436 shutdown. If the application tries to wait for the close_notify alert but the
437 peer closes the connection without sending it, an error is generated. When this
438 option is enabled the peer does not need to send the close_notify alert and a
439 closed connection will be treated as if the close_notify alert was received.
440 For more information on shutting down a connection, see L<SSL_shutdown(3)>.
442 =item B<-id_prefix> I<val>
444 Generate SSL/TLS session IDs prefixed by I<val>. This is mostly useful
445 for testing any SSL/TLS code (e.g. proxies) that wish to deal with multiple
446 servers, when each of which might be generating a unique range of session
447 IDs (e.g. with a certain prefix).
449 =item B<-verify_return_error>
451 Verification errors normally just print a message but allow the
452 connection to continue, for debugging purposes.
453 If this option is used, then verification errors close the connection.
457 Enables certificate status request support (aka OCSP stapling).
459 =item B<-status_verbose>
461 Enables certificate status request support (aka OCSP stapling) and gives
462 a verbose printout of the OCSP response.
464 =item B<-status_timeout> I<int>
466 Sets the timeout for OCSP response to I<int> seconds.
468 =item B<-status_url> I<val>
470 Sets a fallback responder URL to use if no responder URL is present in the
471 server certificate. Without this option an error is returned if the server
472 certificate does not contain a responder address.
473 The optional userinfo and fragment URL components are ignored.
474 Any given query component is handled as part of the path component.
476 =item B<-status_file> I<infile>
478 Overrides any OCSP responder URLs from the certificate and always provides the
479 OCSP Response stored in the file. The file must be in DER format.
483 Show verbose trace output of protocol messages. OpenSSL needs to be compiled
484 with B<enable-ssl-trace> for this option to work.
488 Provide a brief summary of connection parameters instead of the normal verbose
493 Simple test server which just reverses the text received from the client
494 and sends it back to the server. Also sets B<-brief>. Cannot be used in
495 conjunction with B<-early_data>.
499 Switch on asynchronous mode. Cryptographic operations will be performed
500 asynchronously. This will only have an effect if an asynchronous capable engine
501 is also used via the B<-engine> option. For test purposes the dummy async engine
502 (dasync) can be used (if available).
504 =item B<-max_send_frag> I<+int>
506 The maximum size of data fragment to send.
507 See L<SSL_CTX_set_max_send_fragment(3)> for further information.
509 =item B<-split_send_frag> I<+int>
511 The size used to split data for encrypt pipelines. If more data is written in
512 one go than this value then it will be split into multiple pipelines, up to the
513 maximum number of pipelines defined by max_pipelines. This only has an effect if
514 a suitable cipher suite has been negotiated, an engine that supports pipelining
515 has been loaded, and max_pipelines is greater than 1. See
516 L<SSL_CTX_set_split_send_fragment(3)> for further information.
518 =item B<-max_pipelines> I<+int>
520 The maximum number of encrypt/decrypt pipelines to be used. This will only have
521 an effect if an engine has been loaded that supports pipelining (e.g. the dasync
522 engine) and a suitable cipher suite has been negotiated. The default value is 1.
523 See L<SSL_CTX_set_max_pipelines(3)> for further information.
525 =item B<-naccept> I<+int>
527 The server will exit after receiving the specified number of connections,
530 =item B<-read_buf> I<+int>
532 The default read buffer size to be used for connections. This will only have an
533 effect if the buffer size is larger than the size that would otherwise be used
534 and pipelining is in use (see L<SSL_CTX_set_default_read_buffer_len(3)> for
535 further information).
539 There are several known bugs in SSL and TLS implementations. Adding this
540 option enables various workarounds.
544 Disable negotiation of TLS compression.
545 TLS compression is not recommended and is off by default as of
550 Enable negotiation of TLS compression.
551 This option was introduced in OpenSSL 1.1.0.
552 TLS compression is not recommended and is off by default as of
557 Disable RFC4507bis session ticket support. This option has no effect if TLSv1.3
558 is negotiated. See B<-num_tickets>.
560 =item B<-num_tickets>
562 Control the number of tickets that will be sent to the client after a full
563 handshake in TLSv1.3. The default number of tickets is 2. This option does not
564 affect the number of tickets sent after a resumption handshake.
568 Use the server's cipher preferences, rather than the client's preferences.
570 =item B<-prioritize_chacha>
572 Prioritize ChaCha ciphers when preferred by clients. Requires B<-serverpref>.
574 =item B<-no_resumption_on_reneg>
576 Set the B<SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION> option.
578 =item B<-client_sigalgs> I<val>
580 Signature algorithms to support for client certificate authentication
581 (colon-separated list).
583 =item B<-named_curve> I<val>
585 Specifies the elliptic curve to use. NOTE: this is single curve, not a list.
586 For a list of all possible curves, use:
588 $ openssl ecparam -list_curves
590 =item B<-cipher> I<val>
592 This allows the list of TLSv1.2 and below ciphersuites used by the server to be
593 modified. This list is combined with any TLSv1.3 ciphersuites that have been
594 configured. When the client sends a list of supported ciphers the first client
595 cipher also included in the server list is used. Because the client specifies
596 the preference order, the order of the server cipherlist is irrelevant. See
597 L<openssl-ciphers(1)> for more information.
599 =item B<-ciphersuites> I<val>
601 This allows the list of TLSv1.3 ciphersuites used by the server to be modified.
602 This list is combined with any TLSv1.2 and below ciphersuites that have been
603 configured. When the client sends a list of supported ciphers the first client
604 cipher also included in the server list is used. Because the client specifies
605 the preference order, the order of the server cipherlist is irrelevant. See
606 L<openssl-ciphers(1)> command for more information. The format for this list is
607 a simple colon (":") separated list of TLSv1.3 ciphersuite names.
609 =item B<-dhparam> I<infile>
611 The DH parameter file to use. The ephemeral DH cipher suites generate keys
612 using a set of DH parameters. If not specified then an attempt is made to
613 load the parameters from the server certificate file.
614 If this fails then a static set of parameters hard coded into this command
619 Turns on non blocking I/O.
621 =item B<-psk_identity> I<val>
623 Expect the client to send PSK identity I<val> when using a PSK
624 cipher suite, and warn if they do not. By default, the expected PSK
625 identity is the string "Client_identity".
627 =item B<-psk_hint> I<val>
629 Use the PSK identity hint I<val> when using a PSK cipher suite.
633 Use the PSK key I<val> when using a PSK cipher suite. The key is
634 given as a hexadecimal number without leading 0x, for example -psk
636 This option must be provided in order to use a PSK cipher.
638 =item B<-psk_session> I<file>
640 Use the pem encoded SSL_SESSION data stored in I<file> as the basis of a PSK.
641 Note that this will only work if TLSv1.3 is negotiated.
645 This option can only be used in conjunction with one of the DTLS options above.
646 With this option, this command will listen on a UDP port for incoming
648 Any ClientHellos that arrive will be checked to see if they have a cookie in
650 Any without a cookie will be responded to with a HelloVerifyRequest.
651 If a ClientHello with a cookie is received then this command will
652 connect to that peer and complete the handshake.
656 Use SCTP for the transport protocol instead of UDP in DTLS. Must be used in
657 conjunction with B<-dtls>, B<-dtls1> or B<-dtls1_2>. This option is only
658 available where OpenSSL has support for SCTP enabled.
660 =item B<-sctp_label_bug>
662 Use the incorrect behaviour of older OpenSSL implementations when computing
663 endpoint-pair shared secrets for DTLS/SCTP. This allows communication with
664 older broken implementations but breaks interoperability with correct
665 implementations. Must be used in conjunction with B<-sctp>. This option is only
666 available where OpenSSL has support for SCTP enabled.
670 If this option is set then no DH parameters will be loaded effectively
671 disabling the ephemeral DH cipher suites.
673 =item B<-alpn> I<val>, B<-nextprotoneg> I<val>
675 These flags enable the Enable the Application-Layer Protocol Negotiation
676 or Next Protocol Negotiation (NPN) extension, respectively. ALPN is the
677 IETF standard and replaces NPN.
678 The I<val> list is a comma-separated list of supported protocol
679 names. The list should contain the most desirable protocols first.
680 Protocol names are printable ASCII strings, for example "http/1.1" or
682 The flag B<-nextprotoneg> cannot be specified if B<-tls1_3> is used.
686 If this option is set and KTLS is enabled, SSL_sendfile() will be used
687 instead of BIO_write() to send the HTTP response requested by a client.
688 This option is only valid if B<-WWW> or B<-HTTP> is specified.
690 =item B<-keylogfile> I<outfile>
692 Appends TLS secrets to the specified keylog file such that external programs
693 (like Wireshark) can decrypt TLS connections.
695 =item B<-max_early_data> I<int>
697 Change the default maximum early data bytes that are specified for new sessions
698 and any incoming early data (when used in conjunction with the B<-early_data>
699 flag). The default value is approximately 16k. The argument must be an integer
700 greater than or equal to 0.
702 =item B<-recv_max_early_data> I<int>
704 Specify the hard limit on the maximum number of early data bytes that will
709 Accept early data where possible. Cannot be used in conjunction with B<-www>,
710 B<-WWW>, B<-HTTP> or B<-rev>.
714 Require TLSv1.3 cookies.
716 =item B<-anti_replay>, B<-no_anti_replay>
718 Switches replay protection on or off, respectively. Replay protection is on by
719 default unless overridden by a configuration file. When it is on, OpenSSL will
720 automatically detect if a session ticket has been used more than once, TLSv1.3
721 has been negotiated, and early data is enabled on the server. A full handshake
722 is forced if a session ticket is used a second or subsequent time. Any early
723 data that was sent will be rejected.
725 {- $OpenSSL::safe::opt_name_item -}
727 {- $OpenSSL::safe::opt_version_item -}
729 {- $OpenSSL::safe::opt_s_item -}
731 {- $OpenSSL::safe::opt_x_item -}
733 {- $OpenSSL::safe::opt_trust_item -}
735 {- $OpenSSL::safe::opt_r_item -}
737 {- $OpenSSL::safe::opt_engine_item -}
739 {- $OpenSSL::safe::opt_provider_item -}
741 {- $OpenSSL::safe::opt_v_item -}
743 If the server requests a client certificate, then
744 verification errors are displayed, for debugging, but the command will
745 proceed unless the B<-verify_return_error> option is used.
749 =head1 CONNECTED COMMANDS
751 If a connection request is established with an SSL client and neither the
752 B<-www> nor the B<-WWW> option has been used then normally any data received
753 from the client is displayed and any key presses will be sent to the client.
755 Certain commands are also recognized which perform special operations. These
756 commands are a letter which must appear at the start of a line. They are listed
763 End the current SSL connection but still accept new connections.
767 End the current SSL connection and exit.
771 Renegotiate the SSL session (TLSv1.2 and below only).
775 Renegotiate the SSL session and request a client certificate (TLSv1.2 and below
780 Send some plain text down the underlying TCP connection: this should
781 cause the client to disconnect due to a protocol violation.
785 Print out some session cache status information.
789 Send a key update message to the client (TLSv1.3 only)
793 Send a key update message to the client and request one back (TLSv1.3 only)
797 Send a certificate request to the client (TLSv1.3 only)
803 This command can be used to debug SSL clients. To accept connections
804 from a web browser the command:
806 openssl s_server -accept 443 -www
808 can be used for example.
810 Although specifying an empty list of CAs when requesting a client certificate
811 is strictly speaking a protocol violation, some SSL clients interpret this to
812 mean any CA is acceptable. This is useful for debugging purposes.
814 The session parameters can printed out using the L<openssl-sess_id(1)> command.
818 Because this program has a lot of options and also because some of the
819 techniques used are rather old, the C source for this command is rather
820 hard to read and not a model of how things should be done.
821 A typical SSL server program would be much simpler.
823 The output of common ciphers is wrong: it just gives the list of ciphers that
824 OpenSSL recognizes and the client supports.
826 There should be a way for this command to print out details
827 of any unknown cipher suites a client says it supports.
832 L<openssl-sess_id(1)>,
833 L<openssl-s_client(1)>,
834 L<openssl-ciphers(1)>,
836 L<SSL_CTX_set_max_send_fragment(3)>,
837 L<SSL_CTX_set_split_send_fragment(3)>,
838 L<SSL_CTX_set_max_pipelines(3)>,
839 L<ossl_store-file(7)>
843 The -no_alt_chains option was added in OpenSSL 1.1.0.
846 -allow-no-dhe-kex and -prioritize_chacha options were added in OpenSSL 1.1.1.
848 All B<-keyform> and B<-dkeyform> values except B<ENGINE>
849 have become obsolete in OpenSSL 3.0.0 and have no effect.
851 The B<-certform> and B<-dcertform> options have become obsolete in OpenSSL 3.0.0
854 The B<-engine> option was deprecated in OpenSSL 3.0.
858 Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
860 Licensed under the Apache License 2.0 (the "License"). You may not use
861 this file except in compliance with the License. You can obtain a copy
862 in the file LICENSE in the source distribution or at
863 L<https://www.openssl.org/source/license.html>.