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dropshell-tool/openssl-1.1.1w/doc/man3/EVP_sha3_224.pod
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dropshell-tool/openssl-1.1.1w/doc/man3/EVP_sha3_224.pod
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=pod
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=head1 NAME
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EVP_sha3_224,
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EVP_sha3_256,
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EVP_sha3_384,
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EVP_sha3_512,
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EVP_shake128,
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EVP_shake256
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- SHA-3 For EVP
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=head1 SYNOPSIS
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#include <openssl/evp.h>
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const EVP_MD *EVP_sha3_224(void);
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const EVP_MD *EVP_sha3_256(void);
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const EVP_MD *EVP_sha3_384(void);
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const EVP_MD *EVP_sha3_512(void);
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const EVP_MD *EVP_shake128(void);
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const EVP_MD *EVP_shake256(void);
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=head1 DESCRIPTION
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SHA-3 (Secure Hash Algorithm 3) is a family of cryptographic hash functions
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standardized in NIST FIPS 202, first published in 2015. It is based on the
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Keccak algorithm.
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=over 4
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=item EVP_sha3_224(),
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EVP_sha3_256(),
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EVP_sha3_384(),
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EVP_sha3_512()
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The SHA-3 SHA-3-224, SHA-3-256, SHA-3-384, and SHA-3-512 algorithms
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respectively. They produce 224, 256, 384 and 512 bits of output from a given
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input.
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=item EVP_shake128(),
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EVP_shake256()
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The SHAKE-128 and SHAKE-256 Extendable Output Functions (XOF) that can generate
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a variable hash length.
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Specifically, B<EVP_shake128> provides an overall security of 128 bits, while
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B<EVP_shake256> provides that of 256 bits.
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=back
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=head1 RETURN VALUES
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These functions return a B<EVP_MD> structure that contains the
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implementation of the symmetric cipher. See L<EVP_MD_meth_new(3)> for
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details of the B<EVP_MD> structure.
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=head1 CONFORMING TO
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NIST FIPS 202.
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=head1 SEE ALSO
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L<evp(7)>,
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L<EVP_DigestInit(3)>
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=head1 COPYRIGHT
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Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the OpenSSL license (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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