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freebsd/crypto/openssl/doc/man7/EVP_KEM-RSA.pod
Pierre Pronchery b077aed33b Merge OpenSSL 3.0.9
Migrate to OpenSSL 3.0 in advance of FreeBSD 14.0.  OpenSSL 1.1.1 (the
version we were previously using) will be EOL as of 2023-09-11.

Most of the base system has already been updated for a seamless switch
to OpenSSL 3.0.  For many components we've added
`-DOPENSSL_API_COMPAT=0x10100000L` to CFLAGS to specify the API version,
which avoids deprecation warnings from OpenSSL 3.0.  Changes have also
been made to avoid OpenSSL APIs that were already deprecated in OpenSSL
1.1.1.  The process of updating to contemporary APIs can continue after
this merge.

Additional changes are still required for libarchive and Kerberos-
related libraries or tools; workarounds will immediately follow this
commit.  Fixes are in progress in the upstream projects and will be
incorporated when those are next updated.

There are some performance regressions in benchmarks (certain tests in
`openssl speed`) and in some OpenSSL consumers in ports (e.g.  haproxy).
Investigation will continue for these.

Netflix's testing showed no functional regression and a rather small,
albeit statistically significant, increase in CPU consumption with
OpenSSL 3.0.

Thanks to ngie@ and des@ for updating base system components, to
antoine@ and bofh@ for ports exp-runs and port fixes/workarounds, and to
Netflix and everyone who tested prior to commit or contributed to this
update in other ways.

PR:		271615
PR:		271656 [exp-run]
Relnotes:	Yes
Sponsored by:	The FreeBSD Foundation
2023-06-23 18:53:36 -04:00

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=pod
=head1 NAME
EVP_KEM-RSA
- EVP_KEM RSA keytype and algorithm support
=head1 DESCRIPTION
The B<RSA> keytype and its parameters are described in L<EVP_PKEY-RSA(7)>.
See L<EVP_PKEY_encapsulate(3)> and L<EVP_PKEY_decapsulate(3)> for more info.
=head2 RSA KEM parameters
=over 4
=item "operation" (B<OSSL_KEM_PARAM_OPERATION>) <UTF8 string>
The OpenSSL RSA Key Encapsulation Mechanism only currently supports the
following operation
=over 4
=item "RSASVE"
The encapsulate function simply generates a secret using random bytes and then
encrypts the secret using the RSA public key (with no padding).
The decapsulate function recovers the secret using the RSA private key.
=back
This can be set using EVP_PKEY_CTX_set_kem_op().
=back
=head1 CONFORMING TO
=over 4
=item SP800-56Br2
Section 7.2.1.2 RSASVE Generate Operation (RSASVE.GENERATE).
Section 7.2.1.3 RSASVE Recovery Operation (RSASVE.RECOVER).
=back
=head1 SEE ALSO
L<EVP_PKEY_CTX_set_kem_op(3)>,
L<EVP_PKEY_encapsulate(3)>,
L<EVP_PKEY_decapsulate(3)>
L<EVP_KEYMGMT(3)>,
L<EVP_PKEY(3)>,
L<provider-keymgmt(7)>
=head1 HISTORY
This functionality was added in OpenSSL 3.0.
=head1 COPYRIGHT
Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
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
L<https://www.openssl.org/source/license.html>.
=cut