1EVP_BLAKE2B512(3)                   OpenSSL                  EVP_BLAKE2B512(3)
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NAME

6       EVP_blake2b512, EVP_blake2s256 - BLAKE2 For EVP
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SYNOPSIS

9        #include <openssl/evp.h>
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11        const EVP_MD *EVP_blake2b512(void);
12        const EVP_MD *EVP_blake2s256(void);
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DESCRIPTION

15       BLAKE2 is an improved version of BLAKE, which was submitted to the NIST
16       SHA-3 algorithm competition. The BLAKE2s and BLAKE2b algorithms are
17       described in RFC 7693.
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19       EVP_blake2s256()
20           The BLAKE2s algorithm that produces a 256-bit output from a given
21           input.
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23       EVP_blake2b512()
24           The BLAKE2b algorithm that produces a 512-bit output from a given
25           input.
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RETURN VALUES

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

33       RFC 7693.
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NOTES

36       While the BLAKE2b and BLAKE2s algorithms supports a variable length
37       digest, this implementation outputs a digest of a fixed length (the
38       maximum length supported), which is 512-bits for BLAKE2b and 256-bits
39       for BLAKE2s.
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SEE ALSO

42       evp(7), EVP_DigestInit(3)
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45       Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
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47       Licensed under the OpenSSL license (the "License").  You may not use
48       this file except in compliance with the License.  You can obtain a copy
49       in the file LICENSE in the source distribution or at
50       <https://www.openssl.org/source/license.html>.
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541.1.1c                            2019-05-28                 EVP_BLAKE2B512(3)
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