opnsense-src/crypto/openssl/doc/man3/CMS_EnvelopedData_create.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
CMS_EnvelopedData_create_ex, CMS_EnvelopedData_create,
CMS_AuthEnvelopedData_create, CMS_AuthEnvelopedData_create_ex
- Create CMS envelope
=head1 SYNOPSIS
#include <openssl/cms.h>
CMS_ContentInfo *
CMS_EnvelopedData_create_ex(const EVP_CIPHER *cipher, OSSL_LIB_CTX *libctx,
const char *propq);
CMS_ContentInfo *CMS_EnvelopedData_create(const EVP_CIPHER *cipher);
CMS_ContentInfo *
CMS_AuthEnvelopedData_create_ex(const EVP_CIPHER *cipher, OSSL_LIB_CTX *libctx,
const char *propq);
CMS_ContentInfo *CMS_AuthEnvelopedData_create(const EVP_CIPHER *cipher);
=head1 DESCRIPTION
CMS_EnvelopedData_create_ex() creates a B<CMS_ContentInfo> structure
with a type B<NID_pkcs7_enveloped>. I<cipher> is the symmetric cipher to use.
The library context I<libctx> and the property query I<propq> are used when
retrieving algorithms from providers.
CMS_AuthEnvelopedData_create_ex() creates a B<CMS_ContentInfo>
structure with a type B<NID_id_smime_ct_authEnvelopedData>. B<cipher> is the
symmetric AEAD cipher to use. Currently only AES variants with GCM mode are
supported. The library context I<libctx> and the property query I<propq> are
used when retrieving algorithms from providers.
The algorithm passed in the I<cipher> parameter must support ASN1 encoding of
its parameters.
The recipients can be added later using L<CMS_add1_recipient_cert(3)> or
L<CMS_add0_recipient_key(3)>.
The B<CMS_ContentInfo> structure needs to be finalized using L<CMS_final(3)>
and then freed using L<CMS_ContentInfo_free(3)>.
CMS_EnvelopedData_create() and CMS_AuthEnvelopedData_create are similar to
CMS_EnvelopedData_create_ex() and
CMS_AuthEnvelopedData_create_ex() but use default values of NULL for
the library context I<libctx> and the property query I<propq>.
=head1 NOTES
Although CMS_EnvelopedData_create() and CMS_AuthEnvelopedData_create() allocate
a new B<CMS_ContentInfo> structure, they are not usually used in applications.
The wrappers L<CMS_encrypt(3)> and L<CMS_decrypt(3)> are often used instead.
=head1 RETURN VALUES
If the allocation fails, CMS_EnvelopedData_create() and
CMS_AuthEnvelopedData_create() return NULL and set an error code that can be
obtained by L<ERR_get_error(3)>. Otherwise they return a pointer to the newly
allocated structure.
=head1 SEE ALSO
L<ERR_get_error(3)>, L<CMS_encrypt(3)>, L<CMS_decrypt(3)>, L<CMS_final(3)>
=head1 HISTORY
The CMS_EnvelopedData_create_ex() method was added in OpenSSL 3.0.
=head1 COPYRIGHT
Copyright 2020-2021 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