EVP_BLAKE2B512
Section: OpenSSL (3SSL)
Updated: 2024-03-03
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NAME
EVP_blake2b512,
EVP_blake2s256
- BLAKE2 For EVP
SYNOPSIS
#include <openssl/evp.h>
const EVP_MD *EVP_blake2b512(void);
const EVP_MD *EVP_blake2s256(void);
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.
- EVP_blake2s256()
-
The BLAKE2s algorithm that produces a 256-bit output from a given input.
- EVP_blake2b512()
-
The BLAKE2b algorithm that produces a 512-bit output from a given input.
NOTES
Developers should be aware of the negative performance implications of
calling these functions multiple times and should consider using
EVP_MD_fetch(3) with EVP_MD-BLAKE2(7) instead.
See ``Performance'' in crypto(7) 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.
RETURN VALUES
These functions return a EVP_MD structure that contains the
implementation of the message digest. See EVP_MD_meth_new(3) for
details of the EVP_MD structure.
CONFORMING TO
RFC 7693.
SEE ALSO
evp(7),
EVP_DigestInit(3)
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
<https://www.openssl.org/source/license.html>.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- NOTES
-
- RETURN VALUES
-
- CONFORMING TO
-
- SEE ALSO
-
- COPYRIGHT
-
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