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 19=item "fips-indicator" (B<OSSL_EXCHANGE_PARAM_FIPS_APPROVED_INDICATOR>) <integer> 20 21B<X25519> and B<X448> are not FIPS approved in FIPS 140-3. 22So this getter will return 0. 23 24See L<provider-keyexch(7)/Common Key Exchange parameters>. 25 26=back 27 28=head1 EXAMPLES 29 30Keys for the host and peer can be generated as shown in 31L<EVP_PKEY-X25519(7)/Examples>. 32 33The code to generate a shared secret is identical to 34L<EVP_KEYEXCH-DH(7)/Examples>. 35 36=head1 SEE ALSO 37 38L<EVP_PKEY-FFC(7)>, 39L<EVP_PKEY-DH(7)> 40L<EVP_PKEY(3)>, 41L<provider-keyexch(7)>, 42L<provider-keymgmt(7)>, 43L<OSSL_PROVIDER-default(7)>, 44L<OSSL_PROVIDER-FIPS(7)>, 45 46=head1 COPYRIGHT 47 48Copyright 2020-2024 The OpenSSL Project Authors. All Rights Reserved. 49 50Licensed under the Apache License 2.0 (the "License"). You may not use 51this file except in compliance with the License. You can obtain a copy 52in the file LICENSE in the source distribution or at 53L<https://www.openssl.org/source/license.html>. 54 55=cut 56
