src/ssl.c: remove frivolous (void)heap to clear -Wdeclaration-after-statement.

wolfcrypt/src/aes.c: add NEED_AES_TABLES gate around AesSetKey_C() implementations (fixes WOLFSSL_KCAPI_AES builds, probably among others).

wolfcrypt/src/sp_int.c: add missing casts to clear -Wconversions.

Author: douzzer

src/ssl.c

@@ -30149,7 +30149,7 @@ static int set_curves_list(WOLFSSL* ssl, WOLFSSL_CTX *ctx, const char* names)
     char name[MAX_CURVE_NAME_SZ];
     byte groups_len = 0;
 #ifdef WOLFSSL_SMALL_STACK
-    void *heap = ssl? ssl->heap : ctx ? ctx->heap : NULL; (void)heap;
+    void *heap = ssl? ssl->heap : ctx ? ctx->heap : NULL;
     int *groups;
 #else
     int groups[WOLFSSL_MAX_GROUP_COUNT];

wolfcrypt/src/aes.c

@@ -3885,6 +3885,8 @@ static WARN_UNUSED_RESULT int wc_AesDecrypt(
  * and we need both HW and SW. */
 #ifdef NEED_SOFTWARE_AES_SETKEY
 
+#ifdef NEED_AES_TABLES
+
 #ifndef WC_AES_BITSLICED
 /* Set the AES key and expand.
  *
@@ -4125,6 +4127,8 @@ static void AesSetKey_C(Aes* aes, const byte* key, word32 keySz, int dir)
 }
 #endif /* WC_AES_BITSLICED */
 
+#endif /* NEED_AES_TABLES */
+
     /* Software AES - SetKey */
     static WARN_UNUSED_RESULT int wc_AesSetKeyLocal(
         Aes* aes, const byte* userKey, word32 keylen, const byte* iv, int dir,

wolfcrypt/src/sp_int.c

@@ -7687,7 +7687,7 @@ static void sp_clamp_ct(sp_int* a)
     unsigned int used = a->used;
     unsigned int mask = (unsigned int)-1;
 
-    for (i = a->used-1; i >= 0; i--) {
+    for (i = (int)a->used - 1; i >= 0; i--) {
         used -= ((unsigned int)(a->dp[i] == 0)) & mask;
         mask &= (unsigned int)0 - (a->dp[i] == 0);
     }
@@ -17072,7 +17072,9 @@ static int _sp_mont_red(sp_int* a, const sp_int* m, sp_int_digit mp, int ct)
     }
     else {
         for (i = 0; i < m->used * 2; i++) {
-            a->dp[i] &= (sp_int_digit)(sp_int_sdigit)ctMaskIntGTE(a->used-1, i);
+            a->dp[i] &=
+                (sp_int_digit)
+                (sp_int_sdigit)ctMaskIntGTE((int)(a->used-1), (int)i);
         }
     }
 
@@ -17195,7 +17197,9 @@ static int _sp_mont_red(sp_int* a, const sp_int* m, sp_int_digit mp, int ct)
     }
     else {
         for (i = 0; i < m->used * 2; i++) {
-            a->dp[i] &= (sp_int_digit)(sp_int_sdigit)ctMaskIntGTE(a->used-1, i);
+            a->dp[i] &=
+                (sp_int_digit)
+                (sp_int_sdigit)ctMaskIntGTE((int)(a->used-1), (int)i);
         }
     }