From d900e57ae41f410459b3edd86998ccc3c9aba8a6 Mon Sep 17 00:00:00 2001
From: Daniel Pouzzner <douzzer@wolfssl.com>
Date: Thu, 1 Oct 2020 18:07:48 -0500
Subject: [PATCH] improve --enable-linuxkm-defaults fidelity.

---
 configure.ac                 |  5 +++++
 wolfssl/wolfcrypt/settings.h | 16 ++++++++++++----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index b814f2f7b..fbcf5024e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -154,6 +154,11 @@ AC_ARG_ENABLE([linuxkm-defaults],
     [ENABLED_LINUXKM_DEFAULTS=$ENABLED_LINUXKM]
     )
 
+if test "$ENABLED_LINUXKM_DEFAULTS" = "yes"
+then
+    AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_DH_CONST -DWOLFSSL_SP_MOD_WORD_RP -DWOLFSSL_OLD_PRIME_CHECK -DWOLFSSL_SP_DIV_64 -DWOLFSSL_SP_DIV_WORD_HALF -DSP_HALF_SIZE=32 -DSP_HALF_MAX=4294967295U"
+fi
+
 AC_ARG_WITH([linux-source],
     [AS_HELP_STRING([--with-linux-source=PATH],[PATH to root of Linux kernel build tree])],
     [KERNEL_ROOT=$withval],
diff --git a/wolfssl/wolfcrypt/settings.h b/wolfssl/wolfcrypt/settings.h
index d361db60e..ca3c46b0d 100644
--- a/wolfssl/wolfcrypt/settings.h
+++ b/wolfssl/wolfcrypt/settings.h
@@ -2124,10 +2124,18 @@ extern void uITRON4_free(void *p) ;
     #define SIZEOF_LONG         8
     #define SIZEOF_LONG_LONG    8
     #define CHAR_BIT            8
-    #define WOLFSSL_SP_DIV_64
-    #define WOLFSSL_SP_DIV_WORD_HALF
-    #define SP_HALF_SIZE        32
-    #define SP_HALF_MAX         4294967295U
+    #ifndef WOLFSSL_SP_DIV_64
+        #define WOLFSSL_SP_DIV_64
+    #endif
+    #ifndef WOLFSSL_SP_DIV_WORD_HALF
+        #define WOLFSSL_SP_DIV_WORD_HALF
+    #endif
+    #ifndef SP_HALF_SIZE
+        #define SP_HALF_SIZE        32
+    #endif
+    #ifndef SP_HALF_MAX
+        #define SP_HALF_MAX         4294967295U
+    #endif
 #endif