Import OpenSSL 1.1.0f
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@@ -3,8 +3,7 @@
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=head1 NAME
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SSL_CTX_set1_curves, SSL_CTX_set1_curves_list, SSL_set1_curves,
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SSL_set1_curves_list, SSL_get1_curves, SSL_get_shared_curve,
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SSL_CTX_set_ecdh_auto, SSL_set_ecdh_auto - EC supported curve functions
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SSL_set1_curves_list, SSL_get1_curves, SSL_get_shared_curve - EC supported curve functions
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=head1 SYNOPSIS
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@@ -19,15 +18,12 @@ SSL_CTX_set_ecdh_auto, SSL_set_ecdh_auto - EC supported curve functions
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int SSL_get1_curves(SSL *ssl, int *curves);
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int SSL_get_shared_curve(SSL *s, int n);
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int SSL_CTX_set_ecdh_auto(SSL_CTX *ctx, int onoff);
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int SSL_set_ecdh_auto(SSL *s, int onoff);
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=head1 DESCRIPTION
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SSL_CTX_set1_curves() sets the supported curves for B<ctx> to B<clistlen>
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curves in the array B<clist>. The array consist of all NIDs of curves in
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preference order. For a TLS client the curves are used directly in the
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supported curves extension. For a TLS server the curves are used to
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supported curves extension. For a TLS server the curves are used to
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determine the set of shared curves.
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SSL_CTX_set1_curves_list() sets the supported curves for B<ctx> to
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@@ -38,7 +34,7 @@ SSL_set1_curves() and SSL_set1_curves_list() are similar except they set
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supported curves for the SSL structure B<ssl>.
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SSL_get1_curves() returns the set of supported curves sent by a client
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in the supported curves extension. It returns the total number of
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in the supported curves extension. It returns the total number of
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supported curves. The B<curves> parameter can be B<NULL> to simply
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return the number of curves for memory allocation purposes. The
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B<curves> array is in the form of a set of curve NIDs in preference
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@@ -52,11 +48,6 @@ most applications will only be interested in the first shared curve
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so B<n> is normally set to zero. If the value B<n> is out of range,
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NID_undef is returned.
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SSL_CTX_set_ecdh_auto() and SSL_set_ecdh_auto() set automatic curve
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selection for server B<ctx> or B<ssl> to B<onoff>. If B<onoff> is 1 then
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the highest preference curve is automatically used for ECDH temporary
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keys used during key exchange.
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All these functions are implemented as macros.
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=head1 NOTES
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@@ -65,23 +56,10 @@ If an application wishes to make use of several of these functions for
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configuration purposes either on a command line or in a file it should
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consider using the SSL_CONF interface instead of manually parsing options.
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The functions SSL_CTX_set_ecdh_auto() and SSL_set_ecdh_auto() can be used to
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make a server always choose the most appropriate curve for a client. If set
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it will override any temporary ECDH parameters set by a server. Previous
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versions of OpenSSL could effectively only use a single ECDH curve set
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using a function such as SSL_CTX_set_ecdh_tmp(). Newer applications should
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just call:
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SSL_CTX_set_ecdh_auto(ctx, 1);
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and they will automatically support ECDH using the most appropriate shared
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curve.
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=head1 RETURN VALUES
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SSL_CTX_set1_curves(), SSL_CTX_set1_curves_list(), SSL_set1_curves(),
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SSL_set1_curves_list(), SSL_CTX_set_ecdh_auto() and SSL_set_ecdh_auto()
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return 1 for success and 0 for failure.
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SSL_CTX_set1_curves(), SSL_CTX_set1_curves_list(), SSL_set1_curves() and
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SSL_set1_curves_list(), return 1 for success and 0 for failure.
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SSL_get1_curves() returns the number of curves, which may be zero.
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@@ -94,10 +72,19 @@ returns -1.
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=head1 SEE ALSO
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L<SSL_CTX_add_extra_chain_cert(3)|SSL_CTX_add_extra_chain_cert(3)>
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L<SSL_CTX_add_extra_chain_cert(3)>
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=head1 HISTORY
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These functions were first added to OpenSSL 1.0.2.
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=head1 COPYRIGHT
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Copyright 2013-2016 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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