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EVP_shake128.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" EVP_sha3_224, EVP_sha3_256, EVP_sha3_384, EVP_sha3_512, EVP_shake128, EVP_shake256 \&\- SHA\-3 For EVP .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/evp.h> \& \& const EVP_MD *EVP_sha3_224(void); \& const EVP_MD *EVP_sha3_256(void); \& const EVP_MD *EVP_sha3_384(void); \& const EVP_MD *EVP_sha3_512(void); \& \& const EVP_MD *EVP_shake128(void); \& const EVP_MD *EVP_shake256(void); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\s-1SHA\-3\s0 (Secure Hash Algorithm 3) is a family of cryptographic hash functions standardized in \s-1NIST FIPS 202,\s0 first published in 2015. It is based on the Keccak algorithm. .IP "\fBEVP_sha3_224()\fR, \fBEVP_sha3_256()\fR, \fBEVP_sha3_384()\fR, \fBEVP_sha3_512()\fR" 4 .IX Item "EVP_sha3_224(), EVP_sha3_256(), EVP_sha3_384(), EVP_sha3_512()" The \s-1SHA\-3 SHA\-3\-224, SHA\-3\-256, SHA\-3\-384,\s0 and \s-1SHA\-3\-512\s0 algorithms respectively. They produce 224, 256, 384 and 512 bits of output from a given input. .IP "\fBEVP_shake128()\fR, \fBEVP_shake256()\fR" 4 .IX Item "EVP_shake128(), EVP_shake256()" The \s-1SHAKE\-128\s0 and \s-1SHAKE\-256\s0 Extendable Output Functions (\s-1XOF\s0) that can generate a variable hash length. .Sp Specifically, \fBEVP_shake128\fR provides an overall security of 128 bits, while \&\fBEVP_shake256\fR provides that of 256 bits. .SH "RETURN VALUES" .IX Header "RETURN VALUES" These functions return a \fB\s-1EVP_MD\s0\fR structure that contains the implementation of the symmetric cipher. See \fBEVP_MD_meth_new\fR\|(3) for details of the \fB\s-1EVP_MD\s0\fR structure. .SH "CONFORMING TO" .IX Header "CONFORMING TO" \&\s-1NIST FIPS 202.\s0 .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBevp\fR\|(7), \&\fBEVP_DigestInit\fR\|(3) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2017 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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