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.\" ========================================================================
.\"
.IX Title "EVP_SHA1 3"
.TH EVP_SHA1 3 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
EVP_sha1 \&\- SHA\-1 For EVP
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
\&
\& const EVP_MD *EVP_sha1(void);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\s-1SHA\-1\s0 (Secure Hash Algorithm 1) is a cryptographic hash function standardized
in \s-1NIST FIPS 180\-4.\s0 The algorithm was designed by the United States National
Security Agency and initially published in 1995.
.IP "\fBEVP_sha1()\fR" 4
.IX Item "EVP_sha1()"
The \s-1SHA\-1\s0 algorithm which produces a 160\-bit output from a given input.
.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 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>.