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+.\" -*- mode: troff; coding: utf-8 -*-
+.\" Automatically generated by Pod::Man 5.0102 (Pod::Simple 3.45)
+.\"
+.\" 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
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+.fi
+..
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+.    ds C` ""
+.    ds C' ""
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+.    ds C`
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+.\"
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+.ie \n(.g .ds Aq \(aq
+.el       .ds Aq '
+.\"
+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD.  Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.\"
+.\" Avoid warning from groff about undefined register 'F'.
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+..
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+.        if !\nF==2 \{\
+.            nr % 0
+.            nr F 2
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+.\}
+.rr rF
+.\" ========================================================================
+.\"
+.IX Title "CRYPTO_MEMCMP 3ossl"
+.TH CRYPTO_MEMCMP 3ossl 2025-09-30 3.5.4 OpenSSL
+.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH NAME
+CRYPTO_memcmp \- Constant time memory comparison
+.SH SYNOPSIS
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/crypto.h>
+\&
+\& int CRYPTO_memcmp(const void *a, const void *b, size_t len);
+.Ve
+.SH DESCRIPTION
+.IX Header "DESCRIPTION"
+The CRYPTO_memcmp function compares the \fBlen\fR bytes pointed to by \fBa\fR and \fBb\fR
+for equality.
+It takes an amount of time dependent on \fBlen\fR, but independent of the
+contents of the memory regions pointed to by \fBa\fR and \fBb\fR.
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+\&\fBCRYPTO_memcmp()\fR returns 0 if the memory regions are equal and nonzero
+otherwise.
+.SH NOTES
+.IX Header "NOTES"
+Unlike \fBmemcmp\fR\|(2), this function cannot be used to order the two memory regions
+as the return value when they differ is undefined, other than being nonzero.
+.SH COPYRIGHT
+.IX Header "COPYRIGHT"
+Copyright 2019 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>.