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• NAME
• SYNOPSIS
• DESCRIPTION
• RETURN VALUES
• CONFORMING TO
• NOTES
• SEE ALSO
• COPYRIGHT

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 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.