document the EVP_PKEY_CTRL_MD and EVP_PKEY_CTRL_GET_MD command constants

1 files changed, 35 insertions, 4 deletions

diff --git a/lib/libcrypto/man/EVP_PKEY_CTX_ctrl.3 b/lib/libcrypto/man/EVP_PKEY_CTX_ctrl.3
index 7714cb05583..f07d02c825a 100644
--- a/lib/libcrypto/man/EVP_PKEY_CTX_ctrl.3
+++ b/lib/libcrypto/man/EVP_PKEY_CTX_ctrl.3
@@ -1,9 +1,26 @@
-.\" $OpenBSD: EVP_PKEY_CTX_ctrl.3,v 1.22 2019/11/01 13:53:25 schwarze Exp $
+.\" $OpenBSD: EVP_PKEY_CTX_ctrl.3,v 1.23 2023/09/13 13:32:01 schwarze Exp $
 .\" full merge up to: OpenSSL 99d63d46 Oct 26 13:56:48 2016 -0400
-.\" selective merge up to: OpenSSL df75c2bf Dec 9 01:02:36 2018 +0100
+.\" selective merge up to: OpenSSL 24a535ea Sep 22 13:14:20 2020 +0100
 .\" Parts were split out into RSA_pkey_ctx_ctrl(3).
 .\"
-.\" This file was written by Dr. Stephen Henson <steve@openssl.org>
+.\" This file is a derived work.
+.\" The changes are covered by the following Copyright and license:
+.\"
+.\" Copyright (c) 2019, 2023 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 Dr. Stephen Henson <steve@openssl.org>
 .\" and Antoine Salon <asalon@vmware.com>.
 .\" Copyright (c) 2006, 2009, 2013, 2014, 2015, 2018 The OpenSSL Project.
 .\" All rights reserved.
@@ -52,7 +69,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 .\" OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: November 1 2019 $
+.Dd $Mdocdate: September 13 2023 $
 .Dt EVP_PKEY_CTX_CTRL 3
 .Os
 .Sh NAME
@@ -254,6 +271,20 @@ If the key is of the type
 .Dv EVP_PKEY_RSA_PSS
 and has usage restrictions, an error occurs if an attempt is made
 to set the digest to anything other than the restricted value.
+.Pp
+These two macros expand to
+.Fn EVP_PKEY_CTX_ctrl
+with an
+.Fa optype
+of
+.Dv EVP_PKEY_OP_TYPE_SIG
+and the following command arguments:
+.Pp
+.Bl -column -compact EVP_PKEY_CTRL_GET_MD EVP_PKEY_CTX_get_signature_md()
+.It Fa cmd No constant      Ta corresponding macro
+.It Dv EVP_PKEY_CTRL_MD     Ta Fn EVP_PKEY_CTX_set_signature_md
+.It Dv EVP_PKEY_CTRL_GET_MD Ta Fn EVP_PKEY_CTX_get_signature_md
+.El
 .Ss DSA parameters
 The macro
 .Fn EVP_PKEY_CTX_set_dsa_paramgen_bits