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diff --git a/src/lib/libcrypto/man/BN_swap.3 b/src/lib/libcrypto/man/BN_swap.3
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-.\" $OpenBSD: BN_swap.3,v 1.6 2021/12/19 22:06:35 schwarze Exp $
-.\" full merge up to: OpenSSL 61f805c1 Jan 16 01:01:46 2018 +0800
-.\"
-.\" This file is a derived work.
-.\" The changes are covered by the following Copyright and license:
-.\"
-.\" Copyright (c) 2021 Ingo Schwarze <schwarze@openbsd.org>
-.\"
-.\" Permission to use, copy, modify, and distribute this software for any
-.\" purpose with or without fee is hereby granted, provided that the above
-.\" copyright notice and this permission notice appear in all copies.
-.\"
-.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-.\"
-.\" The original file was written by Bodo Moeller <bodo@openssl.org>.
-.\" Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\"
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\"
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in
-.\"    the documentation and/or other materials provided with the
-.\"    distribution.
-.\"
-.\" 3. All advertising materials mentioning features or use of this
-.\"    software must display the following acknowledgment:
-.\"    "This product includes software developed by the OpenSSL Project
-.\"    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
-.\"
-.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
-.\"    endorse or promote products derived from this software without
-.\"    prior written permission. For written permission, please contact
-.\"    openssl-core@openssl.org.
-.\"
-.\" 5. Products derived from this software may not be called "OpenSSL"
-.\"    nor may "OpenSSL" appear in their names without prior written
-.\"    permission of the OpenSSL Project.
-.\"
-.\" 6. Redistributions of any form whatsoever must retain the following
-.\"    acknowledgment:
-.\"    "This product includes software developed by the OpenSSL Project
-.\"    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
-.\"
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-.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
-.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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-.\"
-.Dd $Mdocdate: December 19 2021 $
-.Dt BN_SWAP 3
-.Os
-.Sh NAME
-.Nm BN_swap ,
-.Nm BN_consttime_swap
-.Nd exchange BIGNUMs
-.Sh SYNOPSIS
-.In openssl/bn.h
-.Ft void
-.Fo BN_swap
-.Fa "BIGNUM *a"
-.Fa "BIGNUM *b"
-.Fc
-.Ft void
-.Fo BN_consttime_swap
-.Fa "BN_ULONG condition"
-.Fa "BIGNUM *a"
-.Fa "BIGNUM *b"
-.Fa "int nwords"
-.Fc
-.Sh DESCRIPTION
-.Fn BN_swap
-and
-.Fn BN_consttime_swap
-exchange the values of
-.Fa a
-and
-.Fa b .
-.Pp
-.Fn BN_swap
-implements this by exchanging the pointers to the data buffers of
-.Fa a
-and
-.Fa b
-and also exchanging the values of the
-.Dv BN_FLG_STATIC_DATA
-bits.
-Consequently, the operation is fast and execution time does not depend
-on any properties of the two numbers.
-However, execution time obviously differs between swapping (by calling
-this function) and not swapping (by not calling this function).
-.Pp
-.Fn BN_consttime_swap
-only performs the exchange if the
-.Fa condition
-is non-zero; otherwise, it has no effect.
-It implements the exchange by exchanging the contents of the data
-buffers rather than the pointers to the data buffers.
-This is slower, but implemented in such a way that the execution time
-is not only independent of the properties of the two numbers, but also
-independent of the
-.Fa condition
-argument, i.e. the same for swapping or not swapping.
-Execution time does however grow in an approximately linear manner with the
-.Fa nwords
-argument.
-.Pp
-.Fn BN_consttime_swap
-calls
-.Xr abort 3
-if at least one of
-.Fa a
-or
-.Fa b
-has fewer than
-.Fa nwords
-data words allocated or more than
-.Fa nwords
-data words are currently in use in at least one of them.
-.Sh SEE ALSO
-.Xr BN_new 3 ,
-.Xr BN_set_flags 3
-.Sh HISTORY
-.Fn BN_swap
-first appeared in OpenSSL 0.9.7 and has been available since
-.Ox 3.2 .
-.Pp
-.Fn BN_consttime_swap
-first appeared in OpenSSL 1.0.1g and has been available since
-.Ox 5.6 .