1=pod 2 3=head1 NAME 4 5EVP_KEYEXCH-X25519, 6EVP_KEYEXCH-X448 7- X25519 and X448 Key Exchange algorithm support 8 9=head1 DESCRIPTION 10 11Key exchange support for the B<X25519> and B<X448> key types. 12 13=head2 Key exchange parameters 14 15=over 4 16 17=item "pad" (B<OSSL_EXCHANGE_PARAM_PAD>) <unsigned integer> 18 19See L<provider-keyexch(7)/Common Key Exchange parameters>. 20 21=back 22 23=head1 EXAMPLES 24 25Keys for the host and peer can be generated as shown in 26L<EVP_PKEY-X25519(7)/Examples>. 27 28The code to generate a shared secret is identical to 29L<EVP_KEYEXCH-DH(7)/Examples>. 30 31=head1 SEE ALSO 32 33L<EVP_PKEY-FFC(7)>, 34L<EVP_PKEY-DH(7)> 35L<EVP_PKEY(3)>, 36L<provider-keyexch(7)>, 37L<provider-keymgmt(7)>, 38L<OSSL_PROVIDER-default(7)>, 39L<OSSL_PROVIDER-FIPS(7)>, 40 41=head1 COPYRIGHT 42 43Copyright 2020 The OpenSSL Project Authors. All Rights Reserved. 44 45Licensed under the Apache License 2.0 (the "License"). You may not use 46this file except in compliance with the License. You can obtain a copy 47in the file LICENSE in the source distribution or at 48L<https://www.openssl.org/source/license.html>. 49 50=cut 51