sha256: move SHA256 class inside sha256 namespace

Author: pennam

examples/sha256/sha256.ino

@@ -15,7 +15,7 @@ void setup() {
     Serial.begin(9600);
     while(!Serial);
 
-    uint8_t sha[SHA256::HASH_SIZE];
+    uint8_t sha[SHA256_DIGEST_SIZE];
 
     SHA256 sha256;
     sha256.begin();

src/bpid/bpid.cpp

@@ -38,7 +38,7 @@ namespace arduino { namespace bpid {
         if (!get(data, sizeof(data))) {
             return String("");
         }
-        uint8_t out[SHA256::HASH_SIZE];
+        uint8_t out[SHA256_DIGEST_SIZE];
         arduino::sha256::sha256(data, sizeof(data), out);
         return arduino::hex::encode(out, sizeof(out));
     }

src/sha256/SHA256.cpp

@@ -12,21 +12,6 @@
 
 #include "sha2.h"
 
-class SHA256 {
-
-public:
-
-    static constexpr uint32_t HASH_SIZE = SHA256_DIGEST_SIZE;
-
-    void begin();
-    void update(uint8_t const * data, uint32_t const len);
-    void finalize(uint8_t * hash);
-
-private:
-
-    sha256_ctx _ctx;
-};
-
 namespace arduino { namespace sha256 {
 
     inline void begin(sha256_ctx * ctx) {
@@ -42,4 +27,25 @@ namespace arduino { namespace sha256 {
         ::sha256(input, ilen, output);
     }
 
+    class SHA256 {
+    public:
+
+        inline void begin() {
+            return arduino::sha256::begin(&_ctx);
+        }
+        inline void update(uint8_t const * data, uint32_t const len) {
+            return arduino::sha256::update(&_ctx, data, len);
+        }
+        inline void finalize(uint8_t * hash) {
+            return arduino::sha256::finalize(&_ctx, hash);
+        }
+        static inline void sha256(uint8_t const * data, uint32_t const len, uint8_t * hash) {
+            return arduino::sha256::sha256(data, len, hash);
+        }
+
+    private:
+
+        sha256_ctx _ctx;
+    };
+
 }} // arduino::sha256