MPI: add mp_sign_t and sp_sign_t.

Author: douzzer

wolfcrypt/src/wolfmath.c

@@ -152,7 +152,7 @@ int mp_cond_copy(mp_int* a, int copy, mp_int* b)
         b->used ^= (a->used ^ b->used) & (mp_size_t)mask;
 #if (!defined(WOLFSSL_SP_MATH) && !defined(WOLFSSL_SP_MATH_ALL)) || \
     defined(WOLFSSL_SP_INT_NEGATIVE)
-        b->sign ^= (a->sign ^ b->sign) & (mp_size_t)mask;
+        b->sign ^= (mp_sign_t)(a->sign ^ b->sign) & (mp_sign_t)mask;
 #endif
     }
 

wolfssl/wolfcrypt/integer.h

@@ -223,6 +223,7 @@ typedef int           mp_err;
 #endif
 
 #define mp_size_t int
+#define mp_sign_t int
 
 /* the mp_int structure */
 typedef struct mp_int {

wolfssl/wolfcrypt/sp_int.h

@@ -875,6 +875,10 @@ typedef unsigned int sp_size_t;
 
 /* Type for number of digits. */
 #define mp_size_t    sp_size_t
+#ifdef WOLFSSL_SP_INT_NEGATIVE
+    typedef sp_uint8 sp_sign_t;
+    #define mp_sign_t    sp_sign_t
+#endif
 
 /**
  * SP integer.
@@ -888,7 +892,7 @@ typedef struct sp_int {
     sp_size_t    size;
 #ifdef WOLFSSL_SP_INT_NEGATIVE
     /** Indicates whether number is 0/positive or negative.  */
-    sp_uint8     sign;
+    sp_sign_t    sign;
 #endif
 #ifdef HAVE_WOLF_BIGINT
     /** Unsigned binary (big endian) representation of number. */

wolfssl/wolfcrypt/tfm.h

@@ -380,6 +380,7 @@ while (0)
 #endif
 
 #define mp_size_t int
+#define mp_sign_t int
 
 /* a FP type */
 typedef struct fp_int {