Further user_settings.h cleanup / additions. Additional README.md comments.

IDE/ECLIPSE/SIFIVE/Makefile

@@ -22,13 +22,15 @@ OPT_CFLAGS = -specs=nano.specs
 #OPT_CFLAGS += -O3 -DTIME -DNOENUM -Wno-implicit -mexplicit-relocs -save-temps
 #OPT_CFLAGS += -fno-inline -fno-builtin-printf -fno-common -falign-functions=4
 
-# ovewrite the __stack_size default value of 0x400 with 0x1000(4 Kbytes).
+# override the __stack_size and __heap_size default values of 0x400 
+# SiFive HiFive1 has 16KB of data SRAM
 # The __stack_size and __heap_size symbols are defined in the linker metal.default.ld 
 # script in the freedom-e-sdk. 
 override CFLAGS += $(OPT_CFLAGS) $(WOLFSSL_CFLAGS) \
                      -Xlinker --defsym=__stack_size=0x1200 \
                      -Xlinker --defsym=__heap_size=0x800
 
+
 $(PROGRAM): $(SRC)
 	$(CC) $(CFLAGS) $(SRC) $(LDFLAGS) $(LDLIBS) -o $@
 

IDE/ECLIPSE/SIFIVE/main.c

@@ -130,7 +130,7 @@ int my_rng_gen_block(unsigned char* output, unsigned int sz)
 int main(void)
 {
     int ret;
-    long clkHz = 16000000; /* default */
+    long clk_Hz = 16000000; /* default */
 
 #if WOLFSSL_SIFIVE_RISC_V_DEBUG
     printf("check stack and heap addresses\n");
@@ -144,11 +144,11 @@ int main(void)
     /* Speed up clock */
     printf("SiFive HiFive1 Demo\n");
     printf("Setting clock to %dMHz\n", USE_CLOCK_HZ/1000000);
-    clkHz = metal_clock_set_rate_hz(
+    clk_Hz = metal_clock_set_rate_hz(
         &__METAL_DT_SIFIVE_FE310_G000_PLL_HANDLE->clock, USE_CLOCK_HZ
     );
 #endif
-    printf("Actual Clock %dMHz\n", clkHz/1000000);
+    printf("Actual Clock %dMHz\n", clk_Hz/1000000);
 
 #ifdef DEBUG_WOLFSSL
     wolfSSL_Debugging_ON();

IDE/ECLIPSE/SIFIVE/user_settings.h

@@ -70,22 +70,9 @@ extern "C" {
     //#define TFM_ARM
 #endif
 
-/* Wolf Single Precision Math */
-/* Optional ECC SECP256R1 acceleration using optimized C code */
-#undef WOLFSSL_SP
-#if 1
-    #define WOLFSSL_SP
-    #define WOLFSSL_SP_SMALL  /* use smaller version of code (requires heap) */
-    #define SP_WORD_SIZE 32   /* force 32-bit type */
-    #define WOLFSSL_SP_MATH   /* only SP math - eliminates fast math code */
-    //#define WOLFSSL_SP_DIV_32 /* do not use 64-bit divides */
-
-    #define WOLFSSL_HAVE_SP_ECC
-    //#define WOLFSSL_HAVE_SP_RSA
-#endif
 
 /* ------------------------------------------------------------------------- */
-/* Crypto */
+/* Asymmetric */
 /* ------------------------------------------------------------------------- */
 /* RSA */
 /* Not enabled due to memory constraints on HiFive1 */
@@ -205,6 +192,43 @@ extern "C" {
 #endif
 
 
+/* Wolf Single Precision Math */
+/* Optional ECC SECP256R1 acceleration using optimized C code */
+#undef WOLFSSL_SP
+#if 1
+    #define WOLFSSL_SP
+    #define WOLFSSL_SP_SMALL  /* use smaller version of code (requires heap) */
+    #define SP_WORD_SIZE 32   /* force 32-bit type */
+    #define WOLFSSL_SP_MATH   /* only SP math - eliminates fast math code */
+    //#define WOLFSSL_SP_DIV_32 /* do not use 64-bit divides */
+
+    #ifdef HAVE_ECC
+        #define WOLFSSL_HAVE_SP_ECC
+    #endif
+    #ifndef NO_RSA
+        #define WOLFSSL_HAVE_SP_RSA
+    #endif
+#endif
+
+/* Ed25519 / Curve25519 */
+#undef HAVE_CURVE25519
+#undef HAVE_ED25519
+#if 1
+    #define HAVE_CURVE25519
+    #define HAVE_ED25519 /* ED25519 Requires SHA512 */
+
+    /* Optionally use small math (less flash usage, but much slower) */
+    #if 1
+        /* Curve and Ed 25519 small */
+        #define CURVED25519_SMALL
+    #endif
+#endif
+
+
+/* ------------------------------------------------------------------------- */
+/* Symmetric Ciphers */
+/* ------------------------------------------------------------------------- */
+
 /* AES */
 #undef NO_AES
 #if 1
@@ -230,7 +254,6 @@ extern "C" {
     //#define HAVE_AESCCM
 #endif
 
-
 /* DES3 */
 #undef NO_DES3
 #if 0
@@ -250,23 +273,9 @@ extern "C" {
     #define HAVE_ONE_TIME_AUTH
 #endif
 
-/* Ed25519 / Curve25519 */
-#undef HAVE_CURVE25519
-#undef HAVE_ED25519
-#if 1
-    #define HAVE_CURVE25519
-    #define HAVE_ED25519 /* ED25519 Requires SHA512 */
-
-    /* Optionally use small math (less flash usage, but much slower) */
-    #if 1
-        /* Curve and Ed 25519 small */
-        #define CURVED25519_SMALL
-    #endif
-#endif
-
 
 /* ------------------------------------------------------------------------- */
-/* Hashing */
+/* Symmetric Hashing */
 /* ------------------------------------------------------------------------- */
 /* Sha */
 #undef NO_SHA
@@ -320,6 +329,18 @@ extern "C" {
     #define NO_MD5
 #endif
 
+/* Blake2B */
+#undef HAVE_BLAKE2
+#if 0
+    #define HAVE_BLAKE2
+#endif
+
+/* Blake2S */
+#undef HAVE_BLAKE2S
+#if 0
+    #define HAVE_BLAKE2S
+#endif
+
 /* HKDF */
 #undef HAVE_HKDF
 #if 0
@@ -386,6 +407,7 @@ extern "C" {
     #define XREALLOC(p, n, h, t) myRealloc(p, n, h, t)
 #endif
 
+/* Static memory */
 #if 0
     /* Static memory requires fast math */
     #define WOLFSSL_STATIC_MEMORY
@@ -423,9 +445,8 @@ extern "C" {
 /* ------------------------------------------------------------------------- */
 
 /* Override Current Time */
-/* Allows custom "custom_time()" function to be used for benchmark */
 #if defined(WOLFSSL_SIFIVE_RISC_V)
-    #define WOLFSSL_USER_CURRTIME
+    #define WOLFSSL_USER_CURRTIME /* for benchmarks, uses "custom_time()" function */
     #define WOLFSSL_GMTIME
     #define USER_TICKS
 #else
@@ -569,4 +590,3 @@ extern "C" {
 #endif
 
 #endif /* WOLFSSL_USER_SETTINGS_H */
-