From 08c0a524d170d8dd98c18945a4721c2139b05abd Mon Sep 17 00:00:00 2001
From: Nicolai Stange <nstange@suse.de>
Date: Wed, 17 Nov 2021 14:58:25 +0100
Subject: [PATCH 02/18] crypto: dh - constify struct dh's pointer members
References: jsc#SLE-21132,bsc#1191256
Patch-mainline: v5.18-rc1
Git-commit: 215bebc8c6ac438c382a6a56bd2764a2d4e1da72

struct dh contains several pointer members corresponding to DH parameters:
->key, ->p and ->g. A subsequent commit will make the struct dh
deserialization function, crypto_dh_decode_key(), to set these to
constant static storage arrays for some of the well-known safe-prime
groups.

Turn the struct dh pointer members' types into "pointer to const" in
preparation for this.

Signed-off-by: Nicolai Stange <nstange@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
---
 include/crypto/dh.h |    6 +++---
 security/keys/dh.c  |    2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

--- a/include/crypto/dh.h
+++ b/include/crypto/dh.h
@@ -30,9 +30,9 @@
  * @g_size:	Size of DH generator G
  */
 struct dh {
-	void *key;
-	void *p;
-	void *g;
+	const void *key;
+	const void *p;
+	const void *g;
 	unsigned int key_size;
 	unsigned int p_size;
 	unsigned int g_size;
--- a/security/keys/dh.c
+++ b/security/keys/dh.c
@@ -14,7 +14,7 @@
 #include <keys/user-type.h>
 #include "internal.h"
 
-static ssize_t dh_data_from_key(key_serial_t keyid, void **data)
+static ssize_t dh_data_from_key(key_serial_t keyid, const void **data)
 {
 	struct key *key;
 	key_ref_t key_ref;