| 1 | =pod
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| 2 |
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| 3 | =head1 NAME
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| 4 |
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| 5 | EVP_sha3_224,
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| 6 | EVP_sha3_256,
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| 7 | EVP_sha3_384,
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| 8 | EVP_sha3_512,
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| 9 | EVP_shake128,
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| 10 | EVP_shake256
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| 11 | - SHA-3 For EVP
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| 12 |
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| 13 | =head1 SYNOPSIS
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| 14 |
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| 15 | #include <openssl/evp.h>
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| 16 |
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| 17 | const EVP_MD *EVP_sha3_224(void);
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| 18 | const EVP_MD *EVP_sha3_256(void);
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| 19 | const EVP_MD *EVP_sha3_384(void);
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| 20 | const EVP_MD *EVP_sha3_512(void);
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| 21 |
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| 22 | const EVP_MD *EVP_shake128(void);
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| 23 | const EVP_MD *EVP_shake256(void);
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| 24 |
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| 25 | =head1 DESCRIPTION
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| 26 |
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| 27 | SHA-3 (Secure Hash Algorithm 3) is a family of cryptographic hash functions
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| 28 | standardized in NIST FIPS 202, first published in 2015. It is based on the
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| 29 | Keccak algorithm.
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| 30 |
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| 31 | =over 4
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| 32 |
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| 33 | =item EVP_sha3_224(),
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| 34 | EVP_sha3_256(),
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| 35 | EVP_sha3_384(),
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| 36 | EVP_sha3_512()
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| 37 |
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| 38 | The SHA-3 SHA-3-224, SHA-3-256, SHA-3-384, and SHA-3-512 algorithms
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| 39 | respectively. They produce 224, 256, 384 and 512 bits of output from a given
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| 40 | input.
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| 41 |
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| 42 | =item EVP_shake128(),
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| 43 | EVP_shake256()
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| 44 |
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| 45 | The SHAKE-128 and SHAKE-256 Extendable Output Functions (XOF) that can generate
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| 46 | a variable hash length.
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| 47 |
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| 48 | Specifically, B<EVP_shake128> provides an overall security of 128 bits, while
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| 49 | B<EVP_shake256> provides that of 256 bits.
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| 50 |
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| 51 | =back
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| 52 |
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| 53 |
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| 54 | =head1 RETURN VALUES
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| 55 |
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| 56 | These functions return a B<EVP_MD> structure that contains the
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| 57 | implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for
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| 58 | details of the B<EVP_MD> structure.
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| 59 |
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| 60 | =head1 CONFORMING TO
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| 61 |
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| 62 | NIST FIPS 202.
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| 63 |
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| 64 | =head1 SEE ALSO
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| 65 |
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| 66 | L<evp(7)>,
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| 67 | L<EVP_DigestInit(3)>
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| 68 |
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| 69 | =head1 COPYRIGHT
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| 70 |
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| 71 | Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
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| 72 |
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| 73 | Licensed under the OpenSSL license (the "License"). You may not use
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| 74 | this file except in compliance with the License. You can obtain a copy
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| 75 | in the file LICENSE in the source distribution or at
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| 76 | L<https://www.openssl.org/source/license.html>.
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| 77 |
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| 78 | =cut
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| 79 |
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