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EVP_blake2b512(3)                   OpenSSL                  EVP_blake2b512(3)



NAME
       EVP_blake2b512, EVP_blake2s256 - BLAKE2 For EVP

LIBRARY
       libcrypto, -lcrypto

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 OpenSSL license (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>.



1.1.1                             2018-09-17                 EVP_blake2b512(3)