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EVP_sha512.3
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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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_sha224, EVP_sha256, EVP_sha512_224, EVP_sha512_256, EVP_sha384, EVP_sha512 \&\- SHA\-2 For EVP .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/evp.h> \& \& const EVP_MD *EVP_sha224(void); \& const EVP_MD *EVP_sha256(void); \& const EVP_MD *EVP_sha512_224(void); \& const EVP_MD *EVP_sha512_256(void); \& const EVP_MD *EVP_sha384(void); \& const EVP_MD *EVP_sha512(void); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\s-1SHA\-2\s0 (Secure Hash Algorithm 2) is a family of cryptographic hash functions standardized in \s-1NIST FIPS 180\-4,\s0 first published in 2001. .IP "\fBEVP_sha224()\fR, \fBEVP_sha256()\fR, EVP_sha512_224, EVP_sha512_256, \fBEVP_sha384()\fR, \fBEVP_sha512()\fR" 4 .IX Item "EVP_sha224(), EVP_sha256(), EVP_sha512_224, EVP_sha512_256, EVP_sha384(), EVP_sha512()" The \s-1SHA\-2 SHA\-224, SHA\-256, SHA\-512/224, SHA512/256, SHA\-384\s0 and \s-1SHA\-512\s0 algorithms, which generate 224, 256, 224, 256, 384 and 512 bits respectively of output from a given input. .Sp The two algorithms: \s-1SHA\-512/224\s0 and \s-1SHA512/256\s0 are truncated forms of the \&\s-1SHA\-512\s0 algorithm. They are distinct from \s-1SHA\-224\s0 and \s-1SHA\-256\s0 even though their outputs are of the same size. .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 180\-4.\s0 .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBevp\fR\|(7), \&\fBEVP_DigestInit\fR\|(3) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2017\-2018 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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