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.

RETURN VALUES

       These  functions  return a EVP_MD structure that contains the implementation of the symmetric cipher. See
       EVP_MD_meth_new(3) for details of the EVP_MD structure.

CONFORMING TO

       RFC 7693.

NOTES

       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.

SEE ALSO

       evp(7), EVP_DigestInit(3)

COPYRIGHT

       Copyright 2017 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>.

3.0.2                                              2025-02-05                               EVP_BLAKE2B512(3SSL)