fix filename clash

Author: pennam

src/sha256/SHA256.h

@@ -10,7 +10,7 @@
 
 #pragma once
 
-#include "sha256.h"
+#include "sha2.h"
 
 class SHA256 {
 

src/sha256/sha256.c renamed to src/sha256/sha2.c

@@ -34,7 +34,7 @@
 #define UNROLL_LOOPS /* Enable loops unrolling */
 #endif
 
-#include "sha256.h"
+#include "sha2.h"
 
 #define SHFR(x, n)    (x >> n)
 #define ROTR(x, n)   ((x >> n) | (x << ((sizeof (x) << 3) - n)))

src/sha256/sha256.h renamed to src/sha256/sha2.h

@@ -35,6 +35,7 @@
 
 #include <stdint.h>
 #include <stddef.h>
+#include <string.h>
 
 #define SHA256_DIGEST_SIZE ( 256 / 8)
 #define SHA256_BLOCK_SIZE  ( 512 / 8)