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.IX Title "EVP_WHIRLPOOL 3ossl"
.TH EVP_WHIRLPOOL 3ossl 2026-06-09 3.5.7 OpenSSL
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.SH NAME
EVP_whirlpool
\&\- WHIRLPOOL For EVP
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/evp.h>
\&
\& const EVP_MD *EVP_whirlpool(void);
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
WHIRLPOOL is a cryptographic hash function standardized in ISO/IEC 10118\-3:2004
designed by Vincent Rijmen and Paulo S. L. M. Barreto. This implementation is
only available with the legacy provider.
.IP \fBEVP_whirlpool()\fR 4
.IX Item "EVP_whirlpool()"
The WHIRLPOOL algorithm that produces a message digest of 512\-bits from a given
input.
.SH NOTES
.IX Header "NOTES"
Developers should be aware of the negative performance implications of
calling this function multiple times and should consider using
\&\fBEVP_MD_fetch\fR\|(3) with \fBEVP_MD\-WHIRLPOOL\fR\|(7) instead.
See "Performance" in \fBcrypto\fR\|(7) for further information.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
These functions return a \fBEVP_MD\fR structure that contains the
implementation of the message digest. See \fBEVP_MD_meth_new\fR\|(3) for
details of the \fBEVP_MD\fR structure.
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
ISO/IEC 10118\-3:2004.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBevp\fR\|(7),
\&\fBprovider\fR\|(7),
\&\fBEVP_DigestInit\fR\|(3)
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright 2017\-2023 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (the "License").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
