Add primitives to compute provisioningID

examples/boardID/boardID.ino

@@ -0,0 +1,26 @@
+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+
+#include <Arduino_BPId.h>
+
+void setup() {
+  Serial.begin(9600);
+  while (!Serial);
+
+#ifdef ARDUINO_OPTA
+  Ethernet.begin(NULL,0,0);
+#endif
+
+}
+
+void loop() {
+  Serial.println(arduino::bpid::get());
+  delay(2000);
+}

examples/sha256/buffer.h

@@ -0,0 +1,43 @@
+#pragma once
+
+/*
+ * The following buffer is an hex dump of 1k of random data generated as 
+ * head -c 1k /dev/urandom > /tmp/test
+ * and dumped with the following command `hexdump extras/test/test_files/test-1k -e '32/1 "0x%02X, ""\n"'`
+ * The SHA256 is known 1a7004279b162a6321de07de9d0362a66833b16f9acf870a69331e219eeafc7c  /tmp/test
+ */
+
+uint8_t buffer[] = {
+    0x58, 0x1A, 0x10, 0xDD, 0x00, 0xBE, 0xE1, 0x2B, 0xE5, 0xA9, 0x62, 0xAF, 0x59, 0x66, 0x9C, 0x84, 0x50, 0x91, 0x30, 0x8E, 0x8F, 0xE4, 0x82, 0xE7, 0xDA, 0x9F, 0x90, 0x7A, 0xA2, 0x78, 0xCF, 0x7D,
+    0x40, 0x0E, 0x15, 0x5D, 0x2E, 0xF8, 0x6F, 0xA2, 0xEC, 0x50, 0xF1, 0xC9, 0x20, 0x71, 0xB9, 0xB7, 0xE8, 0x54, 0x06, 0x9E, 0x9E, 0xD7, 0x81, 0x31, 0x37, 0x56, 0x54, 0xD7, 0x37, 0xBE, 0x64, 0xAF,
+    0x9E, 0xC8, 0xFA, 0x67, 0x99, 0x4E, 0xFD, 0x58, 0xB6, 0x27, 0xAF, 0x06, 0xDE, 0xCD, 0x00, 0x40, 0xA7, 0x45, 0x3D, 0x2F, 0x0F, 0x91, 0x93, 0x88, 0x06, 0xDF, 0xC3, 0x60, 0x6F, 0x61, 0x26, 0x36,
+    0xF9, 0x19, 0xB0, 0x6F, 0x00, 0xAC, 0x73, 0xC2, 0x46, 0xC2, 0xC2, 0x96, 0xF0, 0xF3, 0xF7, 0xEE, 0x3D, 0x4E, 0x97, 0x64, 0xDC, 0x6A, 0x4F, 0xF5, 0xFC, 0x29, 0x05, 0x60, 0xA8, 0x0F, 0x9C, 0xF6,
+    0x16, 0xF1, 0xDC, 0xF1, 0x84, 0xFF, 0x47, 0xE1, 0x2A, 0x55, 0x36, 0xC5, 0xB3, 0x1F, 0x8B, 0x38, 0x64, 0xA8, 0x67, 0x31, 0xE2, 0xB9, 0x15, 0x23, 0x6F, 0xD9, 0x9B, 0x68, 0xC8, 0x89, 0xB9, 0xB4,
+    0x52, 0xCD, 0x10, 0xAA, 0xC9, 0x94, 0xFF, 0x13, 0xD2, 0x10, 0x7D, 0x03, 0x83, 0x13, 0xD5, 0xD7, 0x23, 0x86, 0xD9, 0x4A, 0x60, 0xDD, 0xA6, 0x24, 0x3E, 0x4E, 0x0F, 0x3B, 0x46, 0xFD, 0x3C, 0xD9,
+    0x3B, 0xD7, 0xEC, 0xE4, 0xD1, 0xF5, 0xA4, 0xAF, 0x40, 0xCF, 0x35, 0x76, 0x0F, 0x8F, 0xDC, 0x7D, 0x12, 0x92, 0x0B, 0x79, 0xD9, 0x1E, 0x5C, 0xA7, 0xD7, 0x79, 0x46, 0xA3, 0xC1, 0x42, 0x50, 0x11,
+    0x52, 0x77, 0x26, 0xFE, 0x6B, 0x6E, 0xCF, 0xC4, 0x28, 0x64, 0xB2, 0xB2, 0xD8, 0x59, 0xAC, 0x46, 0xB2, 0x0E, 0xAF, 0xD1, 0xC1, 0x3C, 0x02, 0x6A, 0x6E, 0x1C, 0xED, 0xCC, 0x95, 0xCE, 0x1B, 0xFD,
+    0x9E, 0xDB, 0x83, 0xBE, 0xBA, 0xAF, 0xC5, 0x98, 0x98, 0x01, 0x71, 0xE1, 0xD3, 0x6E, 0xF4, 0x26, 0x3C, 0x40, 0x5E, 0x84, 0x24, 0xF7, 0x62, 0x31, 0x3C, 0x8E, 0xF1, 0xE6, 0xCF, 0xB5, 0x29, 0x4B,
+    0x22, 0xA1, 0xA3, 0xB6, 0xE1, 0x7D, 0xFD, 0xEE, 0x7C, 0x5D, 0x84, 0x4D, 0x7E, 0x94, 0x3A, 0x85, 0x82, 0x19, 0x76, 0xBC, 0x66, 0xD7, 0x91, 0x81, 0x9E, 0x34, 0x5C, 0x05, 0x44, 0xE5, 0x10, 0x06,
+    0x24, 0xAC, 0xC7, 0xEF, 0x6D, 0xFB, 0x3E, 0xEB, 0x51, 0x35, 0xD2, 0x51, 0xB1, 0x0D, 0xFD, 0x36, 0x1C, 0x1D, 0x05, 0xE9, 0x7B, 0x99, 0x00, 0x01, 0x57, 0xC9, 0xEF, 0x29, 0xAF, 0x55, 0xBF, 0xC3,
+    0x4F, 0x21, 0x6F, 0x18, 0x9F, 0x02, 0x69, 0x1A, 0x1F, 0xD1, 0xAA, 0x97, 0x7B, 0xBA, 0x5D, 0x47, 0xDD, 0xBA, 0x62, 0xD7, 0xB7, 0x07, 0x67, 0x84, 0x75, 0xE4, 0x66, 0x2A, 0xBA, 0x64, 0xDF, 0x7B,
+    0x12, 0x1B, 0x2D, 0xC7, 0x16, 0xBC, 0xC4, 0x2A, 0xCD, 0x22, 0xE7, 0xCA, 0x11, 0x21, 0x70, 0x44, 0x9B, 0xA7, 0x61, 0xD7, 0x95, 0x0C, 0x87, 0xE6, 0xBF, 0x27, 0x52, 0xED, 0x5C, 0x14, 0x2C, 0xE6,
+    0xBA, 0x00, 0xD4, 0x2E, 0xE7, 0xD6, 0xAA, 0x9E, 0x45, 0x78, 0xA7, 0x21, 0x86, 0xD9, 0x2F, 0x9F, 0x8A, 0x95, 0x42, 0xE0, 0x21, 0x18, 0xBE, 0xDD, 0xD4, 0xF8, 0x9F, 0x13, 0x82, 0xDC, 0xCE, 0x16,
+    0x79, 0x22, 0xFA, 0xF9, 0xDC, 0x1C, 0xE2, 0x6F, 0x84, 0xA2, 0x88, 0x82, 0xCE, 0x51, 0xC8, 0x07, 0x61, 0x90, 0x2E, 0x91, 0x69, 0x94, 0x5E, 0xC3, 0xCA, 0x40, 0x7C, 0xE8, 0x14, 0xC2, 0x53, 0xD7,
+    0x9D, 0xC5, 0x5A, 0x70, 0x45, 0xF7, 0xD1, 0x15, 0xEB, 0x21, 0xBB, 0x86, 0x03, 0xBB, 0x8A, 0xC3, 0x49, 0x6B, 0x42, 0x7A, 0x50, 0x2A, 0x62, 0x33, 0x36, 0xD4, 0xB7, 0xE3, 0xA9, 0x66, 0xD8, 0x96,
+    0x21, 0x34, 0x9F, 0xEF, 0xBA, 0x4D, 0xB2, 0xAE, 0x66, 0x32, 0xFD, 0x3D, 0xD5, 0x47, 0x07, 0x17, 0x4D, 0x55, 0x63, 0x49, 0x54, 0xF8, 0xC6, 0xC4, 0x04, 0xF3, 0xCD, 0xC3, 0x6D, 0xCB, 0x8E, 0x34,
+    0x04, 0x86, 0xC0, 0xFA, 0x1F, 0xB7, 0x1E, 0x86, 0x2D, 0xAB, 0xC4, 0xA5, 0x37, 0xEC, 0xD9, 0x77, 0x39, 0x59, 0x98, 0xFF, 0xDF, 0x1D, 0x27, 0xAB, 0xED, 0xA2, 0xF0, 0x7E, 0x4C, 0xF0, 0x2C, 0x74,
+    0x73, 0x4E, 0x3B, 0x7D, 0x1D, 0xA6, 0x02, 0x65, 0xB5, 0xE7, 0x5D, 0x09, 0x74, 0x0F, 0x5A, 0xCF, 0x82, 0xF9, 0x74, 0x25, 0xEB, 0x39, 0xA9, 0xC2, 0x01, 0x69, 0x5F, 0x8E, 0xAD, 0x7F, 0x67, 0xC7,
+    0x82, 0xB2, 0xC6, 0x72, 0xE7, 0x73, 0xAB, 0xA4, 0x64, 0x9C, 0x0D, 0x2E, 0x28, 0x0D, 0x30, 0x9B, 0x76, 0x54, 0x12, 0xC6, 0xB4, 0xB5, 0xDC, 0xCC, 0x10, 0xB7, 0x12, 0x10, 0x69, 0x0F, 0xE0, 0x14,
+    0x6C, 0xD4, 0x2C, 0x56, 0xA8, 0xCB, 0xDC, 0x7B, 0xD5, 0xFE, 0x32, 0x13, 0x99, 0x32, 0x58, 0xA8, 0x89, 0x79, 0xBD, 0x00, 0x87, 0xF0, 0x15, 0xC0, 0xD8, 0xD9, 0x17, 0x55, 0xD1, 0x83, 0xD3, 0xF1,
+    0x2E, 0x83, 0x02, 0x81, 0x73, 0xE8, 0xE8, 0x0F, 0x99, 0x50, 0xB5, 0x79, 0x1E, 0x7C, 0x17, 0x21, 0xE9, 0xFA, 0x7C, 0x97, 0x4F, 0xC7, 0x3F, 0x3A, 0x36, 0x12, 0x1B, 0x83, 0xA3, 0x44, 0x82, 0x59,
+    0xBE, 0x6B, 0x91, 0xCF, 0xC5, 0x11, 0xBA, 0xB1, 0xF6, 0x77, 0x1E, 0xFC, 0x16, 0x2F, 0x4A, 0x40, 0xDB, 0x9B, 0x16, 0x5D, 0x8D, 0xBB, 0x86, 0x54, 0x15, 0x13, 0x13, 0x15, 0x27, 0x26, 0x2B, 0x4A,
+    0x0A, 0xBE, 0x5E, 0x5A, 0xF8, 0xBF, 0xBF, 0x71, 0xB1, 0xA8, 0xD1, 0x03, 0x8F, 0xE4, 0xB3, 0xA4, 0x82, 0x1F, 0x9C, 0x43, 0x57, 0x7B, 0x90, 0x04, 0x5D, 0x69, 0xCB, 0x48, 0x6D, 0x0C, 0x85, 0x0A,
+    0xC7, 0x3F, 0x19, 0x18, 0x92, 0xD0, 0x20, 0x49, 0xB2, 0x3D, 0xD8, 0xBD, 0x5E, 0xF8, 0x42, 0x73, 0x14, 0xF3, 0xD5, 0xD1, 0xFE, 0xFD, 0xDB, 0xCA, 0x28, 0x15, 0x86, 0xE4, 0x50, 0x99, 0xD2, 0x7E,
+    0xF9, 0x95, 0xAC, 0xBE, 0x8C, 0xC9, 0xEB, 0x1D, 0x85, 0xB7, 0x76, 0x35, 0x0F, 0xF4, 0x68, 0xD7, 0x50, 0x40, 0xF9, 0xBD, 0x72, 0x03, 0x92, 0x4E, 0x16, 0x21, 0x0D, 0x58, 0x8F, 0x63, 0xFB, 0x4F,
+    0x1E, 0xD7, 0x36, 0x19, 0x5A, 0xFD, 0xF2, 0x57, 0x59, 0x14, 0x8D, 0x1D, 0x66, 0x47, 0x7E, 0xF9, 0x02, 0x52, 0x3C, 0xA8, 0x9C, 0x36, 0x11, 0x76, 0x1C, 0x41, 0x84, 0xB2, 0x16, 0xD6, 0xCF, 0x38,
+    0x3E, 0xB0, 0x40, 0xD9, 0x51, 0x44, 0x73, 0x35, 0x93, 0x39, 0x0A, 0xE9, 0x2C, 0x77, 0x4A, 0x02, 0xDD, 0x07, 0xCE, 0x7A, 0xAD, 0xA5, 0x34, 0x03, 0xFD, 0x08, 0x21, 0x61, 0x82, 0xB7, 0xC5, 0x0D,
+    0xC0, 0xEF, 0x2B, 0xB9, 0x90, 0xED, 0x06, 0xF0, 0xA8, 0xC9, 0xB9, 0xCB, 0xF7, 0x38, 0xB9, 0x16, 0x6D, 0x6C, 0x64, 0x8A, 0x18, 0x81, 0x96, 0x31, 0x70, 0xD9, 0x5B, 0xAE, 0x51, 0xBF, 0xC4, 0xED,
+    0x7B, 0x6C, 0xAF, 0x14, 0x29, 0xB6, 0x0A, 0x6F, 0xBB, 0xDE, 0x9D, 0xA0, 0x49, 0x5B, 0x39, 0xB4, 0xC0, 0x83, 0x3E, 0x56, 0x18, 0xE8, 0x03, 0xEE, 0xB0, 0x9B, 0x94, 0xF4, 0x70, 0x94, 0xF3, 0x25,
+    0xA5, 0x42, 0xC5, 0x2E, 0xD3, 0x09, 0xF1, 0x3B, 0x8E, 0x6C, 0x30, 0x29, 0xD0, 0xD4, 0x62, 0x8C, 0xA3, 0x40, 0x21, 0xFA, 0x93, 0x0E, 0x48, 0x81, 0x20, 0x32, 0x1D, 0xF7, 0xD5, 0xF4, 0x50, 0x64,
+    0x68, 0x15, 0x98, 0xFF, 0x3B, 0xD9, 0x64, 0x50, 0x9C, 0x74, 0x0C, 0x25, 0x1E, 0xED, 0xFF, 0x87, 0x84, 0x0B, 0x6D, 0x0F, 0xF3, 0x5E, 0xF9, 0xB6, 0x84, 0x6E, 0x3D, 0xF4, 0x00, 0x37, 0x4D, 0x68,
+};

examples/sha256/sha256.ino

@@ -0,0 +1,43 @@
+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+
+#include <Arduino_SHA256.h>
+#include "buffer.h"
+
+void setup() {
+    Serial.begin(9600);
+    while(!Serial);
+
+    uint8_t sha[SHA256::HASH_SIZE];
+
+    SHA256 sha256;
+    sha256.begin();
+    sha256.update(buffer, sizeof(buffer));
+    sha256.finalize(sha);
+
+    Serial.println(hexEncode(sha, sizeof(sha)));
+
+    /* One-shot */
+    arduino::sha256::oneshot(buffer, sizeof(buffer), sha);
+    Serial.println(hexEncode(sha, sizeof(sha)));
+}
+
+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());
+}
+
+void loop() { }

src/Arduino_BPId.h

@@ -0,0 +1,12 @@
+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+#pragma once
+
+#include "./bpid/bpid.h"

src/Arduino_HEX.h

@@ -0,0 +1,12 @@
+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+#pragma once
+
+#include "./hex/hex.h"

src/Arduino_SHA256.h

@@ -0,0 +1,12 @@
+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+#pragma once
+
+#include "./sha256/SHA256.h"

src/bpid/bpid.cpp

@@ -0,0 +1,46 @@
+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+
+#include "bpid.h"
+#include "../sha256/SHA256.h"
+#include "../hex/hex.h"
+
+namespace arduino { namespace bpid {
+
+    bool get(uint8_t* in, uint32_t size) {
+        if (size < BOARD_PROVISIONING_ID_SIZE) {
+            return false;
+        }
+        uint8_t offset = 0;
+        if (!arduino::ucid::get(&in[offset], size)) {
+            return false;
+        }
+        offset += arduino::ucid::UC_UID_SIZE;
+        if (!arduino::mac::get(&in[offset], size - offset)) {
+            return false;
+        }
+        offset += arduino::mac::IFACE_MAC_SIZE;
+        if (!arduino::csn::get(&in[offset], size - offset)) {
+            return false;
+        }
+        return true;
+    }
+
+    String get() {
+        uint8_t data[BOARD_PROVISIONING_ID_SIZE];
+        if (!get(data, sizeof(data))) {
+            return String("");
+        }
+        uint8_t out[SHA256::HASH_SIZE];
+        arduino::sha256::oneshot(data, sizeof(data), out);
+        return arduino::hex::encode(out, sizeof(out));
+    }
+
+}} // arduino::bpid

src/bpid/bpid.h

@@ -0,0 +1,30 @@
+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+
+#pragma once
+
+#include <Arduino.h>
+#include "ucid.h"
+#include "mac.h"
+#include "csn.h"
+
+namespace arduino { namespace bpid {
+    /*
+     * This library contains the methods to get board provisioning id
+     */
+
+    constexpr int BOARD_PROVISIONING_ID_SIZE  = arduino::ucid::UC_UID_SIZE +
+                                                arduino::mac::IFACE_MAC_SIZE +
+                                                arduino::csn::CRYPTO_SN_SIZE;
+
+    bool get(uint8_t* in, uint32_t size);
+    String get();
+
+}} // arduino::bpid

src/bpid/csn.cpp

@@ -0,0 +1,26 @@
+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+
+#include "csn.h"
+
+namespace arduino { namespace csn {
+
+    bool get(uint8_t *in, uint32_t size) {
+        if (size < CRYPTO_SN_SIZE) {
+            return false;
+        }
+        SecureElement se;
+        if (!se.begin() || !se.serialNumber(in)) {
+            return false;
+        }
+        return true;
+    }
+
+}} // arduino::csn

src/bpid/csn.h

@@ -0,0 +1,39 @@
+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+
+#pragma once
+
+#include <Arduino.h>
+#include <Arduino_SecureElement.h>
+
+namespace arduino { namespace csn {
+    /*
+     * This library contains the methods to get board microcontroller id
+     */
+
+#if   defined(ARDUINO_NANO_RP2040_CONNECT) || \
+      defined(ARDUINO_SAMD_MKRWIFI1010)    || \
+      defined(ARDUINO_SAMD_NANO_33_IOT)    || \
+      defined(ARDUINO_PORTENTA_H7_M7)      || \
+      defined(ARDUINO_OPTA)                || \
+      defined(ARDUINO_GIGA)
+    constexpr int CRYPTO_SN_SIZE  = 9;
+#elif defined(ARDUINO_PORTENTA_C33)        || \
+      defined(ARDUINO_NICLA_VISION)
+    constexpr int CRYPTO_SN_SIZE  = SE05X_SN_LENGTH;
+#elif defined(ARDUINO_UNOR4_WIFI)
+    constexpr int CRYPTO_SN_SIZE  = 6;
+#else
+    #error "Unknown board"
+#endif
+
+    bool get(uint8_t *in, uint32_t size);
+
+}} // arduino::csn

src/bpid/mac.cpp

@@ -0,0 +1,37 @@
+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+
+#include "mac.h"
+
+namespace arduino { namespace mac {
+
+    bool get(uint8_t *in, uint32_t size) {
+        if (size < IFACE_MAC_SIZE) {
+            return false;
+        }
+#if   defined(ARDUINO_SAMD_MKRWIFI1010) || \
+      defined(ARDUINO_SAMD_NANO_33_IOT)
+        WiFi.macAddress(in);
+#elif defined(ARDUINO_PORTENTA_H7_M7)   || \
+      defined(ARDUINO_NICLA_VISION)     || \
+      defined(ARDUINO_GIGA)
+        WiFi.macAddress(in);
+#elif defined(ARDUINO_PORTENTA_C33)     || \
+      defined(ARDUINO_UNOR4_WIFI)
+        WiFi.macAddress(in);
+#elif defined(ARDUINO_NANO_RP2040_CONNECT)
+        WiFi.macAddress(in);
+#elif defined(ARDUINO_OPTA)
+        Ethernet.MACAddress(in);
+#endif
+        return true;
+    }
+
+}} // arduino::mac

src/bpid/mac.h

@@ -0,0 +1,52 @@
+/*
+    This file is part of the Arduino_CloudUtils library.
+
+    Copyright (c) 2024 Arduino SA
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+*/
+
+#pragma once
+
+#if   defined(ARDUINO_NANO_RP2040_CONNECT) || \
+      defined(ARDUINO_SAMD_MKRWIFI1010)    || \
+      defined(ARDUINO_SAMD_NANO_33_IOT)    || \
+      defined(ARDUINO_PORTENTA_H7_M7)      || \
+      defined(ARDUINO_NICLA_VISION)        || \
+      defined(ARDUINO_GIGA)
+    #include <WiFi.h>
+    #define IFACE_MAC_ADDR_LENGTH WL_MAC_ADDR_LENGTH
+#elif defined(ARDUINO_PORTENTA_C33)
+    #include <WiFiC3.h>
+    #define IFACE_MAC_ADDR_LENGTH WL_MAC_ADDR_LENGTH
+#elif defined(ARDUINO_UNOR4_WIFI)
+    #include <WiFi.h>
+    #define IFACE_MAC_ADDR_LENGTH WL_MAC_ADDR_LENGTH
+#elif defined(ARDUINO_OPTA)
+    #include <Ethernet.h>
+    #define IFACE_MAC_ADDR_LENGTH 6
+#else
+    #error "Unknown board"
+#endif
+
+namespace arduino { namespace mac {
+    /*
+     * This library contains the methods to get board mac address
+     * ARDUINO_NANO_RP2040_CONNECT: reversed
+     * ARDUINO_SAMD_MKRWIFI1010: reversed
+     * ARDUINO_SAMD_NANO_33_IOT: reversed
+     * ARDUINO_PORTENTA_H7_M7: WiFi.setTimeout(0);WiFi.begin("In33dm4c4ddr35", "In33dm4c4ddr35", ENC_TYPE_TKIP) reversed
+     * ARDUINO_NICLA_VISION:
+     * ARDUINO_GIGA:
+     * ARDUINO_PORTENTA_C33: Interface.begin() not reversed
+     * ARDUINO_UNOR4_WIFI: not reversed
+     * ARDUINO_OPTA: Ethernet.begin(NULL,0,0); reversed
+     */
+
+    constexpr int IFACE_MAC_SIZE = IFACE_MAC_ADDR_LENGTH;
+
+    bool get(uint8_t *in, uint32_t size);
+
+}} // arduino::mac