| =pod |
| |
| =head1 NAME |
| |
| X25519 - EVP_PKEY X25519 support |
| |
| =head1 DESCRIPTION |
| |
| The B<X25519> EVP_PKEY implementation supports key generation and key |
| derivation using B<X25519>. It has associated private and public key formats |
| compatible with draft-ietf-curdle-pkix-03. |
| |
| No additional parameters can be set during key generation. |
| |
| The peer public key must be set using EVP_PKEY_derive_set_peer() when |
| performing key derivation. |
| |
| =head1 NOTES |
| |
| A context for the B<X25519> algorithm can be obtained by calling: |
| |
| EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(NID_X25519, NULL); |
| |
| =head1 EXAMPLE |
| |
| This example generates an B<X25519> private key and writes it to standard |
| output in PEM format: |
| |
| #include <openssl/evp.h> |
| #include <openssl/pem.h> |
| ... |
| EVP_PKEY *pkey = NULL; |
| EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(NID_X25519, NULL); |
| EVP_PKEY_keygen_init(pctx); |
| EVP_PKEY_keygen(pctx, &pkey); |
| EVP_PKEY_CTX_free(pctx); |
| PEM_write_PrivateKey(stdout, pkey, NULL, NULL, 0, NULL, NULL); |
| |
| The key derivation example in L<EVP_PKEY_derive(3)> can be used with |
| B<X25519>. |
| |
| =head1 SEE ALSO |
| |
| L<EVP_PKEY_CTX_new(3)>, |
| L<EVP_PKEY_keygen(3)>, |
| L<EVP_PKEY_derive(3)>, |
| L<EVP_PKEY_derive_set_peer(3)> |
| |
| =head1 COPYRIGHT |
| |
| Copyright 2017 The OpenSSL Project Authors. All Rights Reserved. |
| |
| Licensed under the OpenSSL license (the "License"). You may not use |
| this file except in compliance with the License. You can obtain a copy |
| in the file LICENSE in the source distribution or at |
| L<https://www.openssl.org/source/license.html>. |
| |
| =cut |
