Mark the inputs to bn_mul_comba{4,8}() as const.

This makes it consistent with bn_sqr_comba{4,8}() and simplifies an
upcoming change.

ok tb@

3 files changed, 9 insertions, 9 deletions

diff --git a/src/lib/libcrypto/bn/arch/amd64/bn_arch.c b/src/lib/libcrypto/bn/arch/amd64/bn_arch.c
index a377a05681..8eb3670def 100644
--- a/src/lib/libcrypto/bn/arch/amd64/bn_arch.c
+++ b/src/lib/libcrypto/bn/arch/amd64/bn_arch.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: bn_arch.c,v 1.7 2023/06/24 16:01:44 jsing Exp $ */
+/*      $OpenBSD: bn_arch.c,v 1.8 2025/08/05 15:01:13 jsing Exp $ */
 /*
  * Copyright (c) 2023 Joel Sing <jsing@openbsd.org>
  *
@@ -78,7 +78,7 @@ bn_mul_words(BN_ULONG *rd, const BN_ULONG *ad, int num, BN_ULONG w)
 
 #ifdef HAVE_BN_MUL_COMBA4
 void
-bn_mul_comba4(BN_ULONG *rd, BN_ULONG *ad, BN_ULONG *bd)
+bn_mul_comba4(BN_ULONG *rd, const BN_ULONG *ad, const BN_ULONG *bd)
 {
         /* XXX - consider using non-alt on CPUs that have the ADX extension. */
         bignum_mul_4_8_alt((uint64_t *)rd, (uint64_t *)ad, (uint64_t *)bd);
@@ -87,7 +87,7 @@ bn_mul_comba4(BN_ULONG *rd, BN_ULONG *ad, BN_ULONG *bd)
 
 #ifdef HAVE_BN_MUL_COMBA8
 void
-bn_mul_comba8(BN_ULONG *rd, BN_ULONG *ad, BN_ULONG *bd)
+bn_mul_comba8(BN_ULONG *rd, const BN_ULONG *ad, const BN_ULONG *bd)
 {
         /* XXX - consider using non-alt on CPUs that have the ADX extension. */
         bignum_mul_8_16_alt((uint64_t *)rd, (uint64_t *)ad, (uint64_t *)bd);
diff --git a/src/lib/libcrypto/bn/bn_local.h b/src/lib/libcrypto/bn/bn_local.h
index 0eb9a7a745..af280ebfce 100644
--- a/src/lib/libcrypto/bn/bn_local.h
+++ b/src/lib/libcrypto/bn/bn_local.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: bn_local.h,v 1.51 2025/05/25 04:30:55 jsing Exp $ */
+/* $OpenBSD: bn_local.h,v 1.52 2025/08/05 15:01:13 jsing Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -240,8 +240,8 @@ BN_ULONG bn_sub(BN_ULONG *r, int r_len, const BN_ULONG *a, int a_len,
     const BN_ULONG *b, int b_len);
 
 void bn_mul_normal(BN_ULONG *r, BN_ULONG *a, int na, BN_ULONG *b, int nb);
-void bn_mul_comba4(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b);
-void bn_mul_comba8(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b);
+void bn_mul_comba4(BN_ULONG *r, const BN_ULONG *a, const BN_ULONG *b);
+void bn_mul_comba8(BN_ULONG *r, const BN_ULONG *a, const BN_ULONG *b);
 
 void bn_sqr_comba4(BN_ULONG *r, const BN_ULONG *a);
 void bn_sqr_comba8(BN_ULONG *r, const BN_ULONG *a);
diff --git a/src/lib/libcrypto/bn/bn_mul.c b/src/lib/libcrypto/bn/bn_mul.c
index 7ec7d43437..ebf34bb413 100644
--- a/src/lib/libcrypto/bn/bn_mul.c
+++ b/src/lib/libcrypto/bn/bn_mul.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: bn_mul.c,v 1.40 2025/08/03 10:32:04 tb Exp $ */
+/* $OpenBSD: bn_mul.c,v 1.41 2025/08/05 15:01:13 jsing Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -74,7 +74,7 @@
  */
 #ifndef HAVE_BN_MUL_COMBA4
 void
-bn_mul_comba4(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b)
+bn_mul_comba4(BN_ULONG *r, const BN_ULONG *a, const BN_ULONG *b)
 {
         BN_ULONG c0, c1, c2;
 
@@ -110,7 +110,7 @@ bn_mul_comba4(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b)
  */
 #ifndef HAVE_BN_MUL_COMBA8
 void
-bn_mul_comba8(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b)
+bn_mul_comba8(BN_ULONG *r, const BN_ULONG *a, const BN_ULONG *b)
 {
         BN_ULONG c0, c1, c2;