mirror of
https://github.com/openssl/openssl.git
synced 2024-12-21 06:09:35 +08:00
e798248c84
Clearly document that implicit fetching is slower when using providers, and explain prefetching. Added to crypto.pod and migration_guide.pod links to it. Add a link to EVP_default_properties_enable_fips() in crypto.pod. Reviewed-by: Matt Caswell <matt@openssl.org> Reviewed-by: Paul Dale <pauli@openssl.org> (Merged from https://github.com/openssl/openssl/pull/20354)
71 lines
1.6 KiB
Plaintext
71 lines
1.6 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
EVP_blake2b512,
|
|
EVP_blake2s256
|
|
- BLAKE2 For EVP
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/evp.h>
|
|
|
|
const EVP_MD *EVP_blake2b512(void);
|
|
const EVP_MD *EVP_blake2s256(void);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
BLAKE2 is an improved version of BLAKE, which was submitted to the NIST SHA-3
|
|
algorithm competition. The BLAKE2s and BLAKE2b algorithms are described in
|
|
RFC 7693.
|
|
|
|
=over 4
|
|
|
|
=item EVP_blake2s256()
|
|
|
|
The BLAKE2s algorithm that produces a 256-bit output from a given input.
|
|
|
|
=item EVP_blake2b512()
|
|
|
|
The BLAKE2b algorithm that produces a 512-bit output from a given input.
|
|
|
|
=back
|
|
|
|
=head1 NOTES
|
|
|
|
Developers should be aware of the negative performance implications of
|
|
calling these functions multiple times and should consider using
|
|
L<EVP_MD_fetch(3)> instead.
|
|
See L<crypto(7)/Performance> for further information.
|
|
|
|
While the BLAKE2b and BLAKE2s algorithms supports a variable length digest,
|
|
this implementation outputs a digest of a fixed length (the maximum length
|
|
supported), which is 512-bits for BLAKE2b and 256-bits for BLAKE2s.
|
|
|
|
=head1 RETURN VALUES
|
|
|
|
These functions return a B<EVP_MD> structure that contains the
|
|
implementation of the message digest. See L<EVP_MD_meth_new(3)> for
|
|
details of the B<EVP_MD> structure.
|
|
|
|
=head1 CONFORMING TO
|
|
|
|
RFC 7693.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<evp(7)>,
|
|
L<EVP_DigestInit(3)>
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2017-2022 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
|
|
|