BPId remove static hexEncode function

Author: pennam

src/bpid/bpid.cpp

@@ -10,20 +10,10 @@
 
 #include "bpid.h"
 #include "../sha256/SHA256.h"
+#include "../hex/hex.h"
 
 namespace arduino { namespace bpid {
 
-    static String hexEncode(uint8_t* in, uint32_t size) {
-        String out;
-        out.reserve((size * 2) + 1);
-
-        char *ptr = out.begin();
-        for (uint32_t i = 0; i < size; i++) {
-            ptr += sprintf(ptr, "%02X", in[i]);
-        }
-        return String(out.c_str());
-    }
-
     bool get(uint8_t* in, uint32_t size) {
         if (size < BOARD_PROVISIONING_ID_SIZE) {
             return false;
@@ -46,11 +36,11 @@ namespace arduino { namespace bpid {
     String get() {
         uint8_t data[BOARD_PROVISIONING_ID_SIZE];
         if (!get(data, sizeof(data))) {
-            return String("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF");
+            return String("");
         }
         uint8_t out[SHA256::HASH_SIZE];
-        arduino::sha256::oneshot(data, sizeof(data), out, sizeof(data));
-        return hexEncode(out, sizeof(out));
+        arduino::sha256::oneshot(data, sizeof(data), out);
+        return arduino::hex::encode(out, sizeof(out));
     }
 
 }} // arduino::bpid