mirror of
https://github.com/openssl/openssl.git
synced 2024-12-27 06:21:43 +08:00
b6eb95fa44
Earlier today, it took me five manuals! to find what on earth the "Performance"/"EVP_MD_fetch(3)" crosslinks actually mean: EVP_sha1(3) crypto(7) EVP_MD_fetch(3) (but not there! don't read that!) OSSL_PROVIDER-default(7) EVP_MD-SHA1(7) If, instead, EVP_sha1(3) referenced EVP_MD-SHA1(7) at /all/, which it should do, since it's supposed to be what you're replacing it with, but it doesn't actually say that, maybe people would use it. I know I didn't because it's basically just deadass buried As found by git grep -l 'and should consider using' Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/22420)
86 lines
1.9 KiB
Plaintext
86 lines
1.9 KiB
Plaintext
=pod
|
|
|
|
=head1 NAME
|
|
|
|
EVP_sha3_224,
|
|
EVP_sha3_256,
|
|
EVP_sha3_384,
|
|
EVP_sha3_512,
|
|
EVP_shake128,
|
|
EVP_shake256
|
|
- SHA-3 For EVP
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
#include <openssl/evp.h>
|
|
|
|
const EVP_MD *EVP_sha3_224(void);
|
|
const EVP_MD *EVP_sha3_256(void);
|
|
const EVP_MD *EVP_sha3_384(void);
|
|
const EVP_MD *EVP_sha3_512(void);
|
|
|
|
const EVP_MD *EVP_shake128(void);
|
|
const EVP_MD *EVP_shake256(void);
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
SHA-3 (Secure Hash Algorithm 3) is a family of cryptographic hash functions
|
|
standardized in NIST FIPS 202, first published in 2015. It is based on the
|
|
Keccak algorithm.
|
|
|
|
=over 4
|
|
|
|
=item EVP_sha3_224(),
|
|
EVP_sha3_256(),
|
|
EVP_sha3_384(),
|
|
EVP_sha3_512()
|
|
|
|
The SHA-3 SHA-3-224, SHA-3-256, SHA-3-384, and SHA-3-512 algorithms
|
|
respectively. They produce 224, 256, 384 and 512 bits of output from a given
|
|
input.
|
|
|
|
=item EVP_shake128(),
|
|
EVP_shake256()
|
|
|
|
The SHAKE-128 and SHAKE-256 Extendable Output Functions (XOF) that can generate
|
|
a variable hash length.
|
|
|
|
Specifically, B<EVP_shake128> provides an overall security of 128 bits, while
|
|
B<EVP_shake256> provides that of 256 bits.
|
|
|
|
=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)> with L<EVP_MD-SHA3(7)> or L<EVP_MD-SHAKE(7)> instead.
|
|
See L<crypto(7)/Performance> for further information.
|
|
|
|
=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
|
|
|
|
NIST FIPS 202.
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<evp(7)>,
|
|
L<EVP_DigestInit(3)>
|
|
|
|
=head1 COPYRIGHT
|
|
|
|
Copyright 2017-2023 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
|
|
|