From 29edef1645d1e92e015f95eeaa8f6761f0167408 Mon Sep 17 00:00:00 2001
From: David Garske <david@wolfssl.com>
Date: Mon, 10 Jul 2023 13:09:58 -0700
Subject: [PATCH] Fix for SP math only case to ensure fast math and heap math
 are disabled. Also fix build error for case where `WOLFSSL_HAVE_SP_ECC` is
 defined, but `HAVE_ECC` is not. ZD 16419

---
 wolfssl/wolfcrypt/settings.h | 5 +++++
 wolfssl/wolfcrypt/sp.h       | 6 +++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/wolfssl/wolfcrypt/settings.h b/wolfssl/wolfcrypt/settings.h
index a14364d4d1..cc0d876314 100644
--- a/wolfssl/wolfcrypt/settings.h
+++ b/wolfssl/wolfcrypt/settings.h
@@ -2033,17 +2033,22 @@ extern void uITRON4_free(void *p) ;
          *      Constant time: Always
          *      Enable:        WOLFSSL_SP_MATH_ALL
          */
+        #undef USE_FAST_MATH
+        #undef USE_INTEGER_HEAP_MATH
     #elif defined(WOLFSSL_SP_MATH)
         /*  2) SP Math with restricted key sizes: wolfSSL proprietary math
          *         implementation (sp_*.c).
          *      Constant time: Always
          *      Enable:        WOLFSSL_SP_MATH
          */
+        #undef USE_FAST_MATH
+        #undef USE_INTEGER_HEAP_MATH
     #elif defined(USE_FAST_MATH)
         /*  3) Tom's Fast Math: Stack based (tfm.c)
          *      Constant time: Only with TFM_TIMING_RESISTANT
          *      Enable:        USE_FAST_MATH
          */
+        #undef USE_INTEGER_HEAP_MATH
     #elif defined(USE_INTEGER_HEAP_MATH)
         /*  4) Integer Heap Math:  Heap based (integer.c)
          *      Constant time: Not supported
diff --git a/wolfssl/wolfcrypt/sp.h b/wolfssl/wolfcrypt/sp.h
index 2bf033af0d..4544f5264c 100644
--- a/wolfssl/wolfcrypt/sp.h
+++ b/wolfssl/wolfcrypt/sp.h
@@ -41,7 +41,11 @@
 #include <wolfssl/wolfcrypt/wolfmath.h>
 #include <wolfssl/wolfcrypt/sp_int.h>
 
-#include <wolfssl/wolfcrypt/ecc.h>
+#if defined(HAVE_ECC) && defined(WOLFSSL_HAVE_SP_ECC)
+    #include <wolfssl/wolfcrypt/ecc.h>
+#else
+    #undef WOLFSSL_HAVE_SP_ECC
+#endif
 
 #ifdef noinline
     #define SP_NOINLINE noinline