=encoding utf-8


=head1 Name

ngx.proxyssl - Lua API for controlling NGINX upstream SSL handshakes


=head1 Status

This Lua module is production ready.


=head1 Synopsis


    server {
        listen 443 ssl;
        server_name   test.com;
    
        proxy_ssl_certificate_by_lua_block {
            local proxy_ssl = require "ngx.proxyssl"
    
            local ver, err = proxy_ssl.get_tls1_version_str()
            if not ver then
                ngx.log(ngx.ERR, "failed to get TLS1 version: ", err)
                return
            end
            ngx.log(ngx.INFO, "got TLS1 version: ", ver)
        }
    
        location / {
            root html;
        }
    }


=head1 Description

This Lua module provides API functions to control the SSL handshake process in contexts like L<proxy_ssl_certificate_by_lua*|https://github.com/openresty/lua-nginx-module/#proxy_ssl_certificate_by_lua_block> and L<proxy_ssl_verify_by_lua*|https://github.com/openresty/lua-nginx-module/#proxy_ssl_verify_by_lua_block> (of the L<ngx_lua|https://github.com/openresty/lua-nginx-module#readme> module).

This Lua module only provides API functions that can be used in any upstream SSL context, so here we make it an independent module.

To load the C<ngx.proxyssl> module in Lua, just write


    local proxy_ssl = require "ngx.proxyssl"




=head1 Methods


=head2 get_tls1_version

B<syntax:> I<ver, err = proxy_ssl.get_tls1_version()>

B<context:> I<any>

It's the same as L<ngx.ssl.get_tls1_version|https://github.com/openresty/lua-resty-core/blob/master/lib/ngx/ssl.md#get_tls1_version>, but for the current upstream SSL connection.

This function can be called in any context where upstream https is used.




=head2 get_tls1_version_str

B<syntax:> I<ver, err = proxy_ssl.get_tls1_version_str()>

B<context:> I<any>

It's the same as L<ngx.ssl.get_tls1_version_str|https://github.com/openresty/lua-resty-core/blob/master/lib/ngx/ssl.md#get_tls1_version_str>, but for the current upstream SSL connection.

This function can be called in any context where upstream https is used.




=head1 Community




=head2 English Mailing List

The L<openresty-en|https://groups.google.com/group/openresty-en> mailing list is for English speakers.




=head2 Chinese Mailing List

The L<openresty|https://groups.google.com/group/openresty> mailing list is for Chinese speakers.




=head1 Bugs and Patches

Please report bugs or submit patches by


=over


=item 1.

creating a ticket on the L<GitHub Issue Tracker|https://github.com/openresty/lua-resty-core/issues>,

=item 2.

or posting to the L<OpenResty community>.


=back




=head1 Author

Fuhong Ma E<lt>willmafh@hotmail.comE<gt> (willmafh)




=head1 Copyright and License

This module is licensed under the BSD license.

Copyright (C) 2015-2017, by Yichun "agentzh" Zhang, OpenResty Inc.

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:


=over


=item *

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.


=back


=over


=item *

Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.


=back

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.




=head1 See Also


=over


=item *

the ngx_lua module: https://github.com/openresty/lua-nginx-module

=item *

the L<proxy_ssl_certificate_by_lua*|https://github.com/openresty/lua-nginx-module/#proxy_ssl_certificate_by_lua_block> directive.

=item *

the L<proxy_ssl_verify_by_lua*|https://github.com/openresty/lua-nginx-module/#proxy_ssl_verify_by_lua_block> directive.

=item *

the L<lua-resty-core|https://github.com/openresty/lua-resty-core> library.

=item *

OpenResty: https://openresty.org


=back


