[v2,02/18] crypto: dh - constify struct dh's pointer members

Commit Message

Nicolai Stange Dec. 9, 2021, 9:03 a.m. UTC

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 <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
---
 include/crypto/dh.h | 6 +++---
 security/keys/dh.c  | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

Patch

diff --git a/include/crypto/dh.h b/include/crypto/dh.h
index 2585f0e6bb69..67f3f6bca527 100644
--- 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;
diff --git a/security/keys/dh.c b/security/keys/dh.c
index 1abfa70ed6e1..a58f6fb9f6db 100644
--- 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;