mirror of
https://github.com/openssl/openssl.git
synced 2024-12-27 06:21:43 +08:00
c08dea30d4
CLA: trivial Signed-off-by: Jakub Jelen <jjelen@redhat.com> Reviewed-by: Kurt Roeckx <kurt@roeckx.be> Reviewed-by: Richard Levitte <levitte@openssl.org> Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org> (Merged from https://github.com/openssl/openssl/pull/11299)
75 lines
2.2 KiB
Plaintext
75 lines
2.2 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
X25519,
|
|
X448
|
|
- EVP_PKEY X25519 and X448 support
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
The B<X25519> and B<X448> EVP_PKEY implementation supports key generation and
|
|
key derivation using B<X25519> and B<X448>. It has associated private and public
|
|
key formats compatible with RFC 8410.
|
|
|
|
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(EVP_PKEY_X25519, NULL);
|
|
|
|
For the B<X448> algorithm a context can be obtained by calling:
|
|
|
|
EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_X448, NULL);
|
|
|
|
X25519 or X448 private keys can be set directly using
|
|
L<EVP_PKEY_new_raw_private_key(3)> or loaded from a PKCS#8 private key file
|
|
using L<PEM_read_bio_PrivateKey(3)> (or similar function). Completely new keys
|
|
can also be generated (see the example below). Setting a private key also sets
|
|
the associated public key.
|
|
|
|
X25519 or X448 public keys can be set directly using
|
|
L<EVP_PKEY_new_raw_public_key(3)> or loaded from a SubjectPublicKeyInfo
|
|
structure in a PEM file using L<PEM_read_bio_PUBKEY(3)> (or similar function).
|
|
|
|
=head1 EXAMPLES
|
|
|
|
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(EVP_PKEY_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> and B<X448>.
|
|
|
|
=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 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
|
|
|
|
Licensed under the Apache License 2.0 (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
|