From a585642060f802a0bae12d7cdef97735dc5b5b7c Mon Sep 17 00:00:00 2001
From: pennam <m.pennasilico@arduino.cc>
Date: Fri, 29 Nov 2024 14:04:31 +0100
Subject: [PATCH] Add serialNumber(byte sn[], size_t length)

---
 src/SecureElement.cpp | 17 +++++++++++++++++
 src/SecureElement.h   |  9 +++++++++
 2 files changed, 26 insertions(+)

diff --git a/src/SecureElement.cpp b/src/SecureElement.cpp
index 882bf4f..f0ccd96 100644
--- a/src/SecureElement.cpp
+++ b/src/SecureElement.cpp
@@ -60,3 +60,20 @@ int SecureElement::SHA256(const uint8_t *buffer, size_t size, uint8_t *digest)
 #endif
 }
 
+int SecureElement::serialNumber(byte sn[], size_t length)
+{
+#if defined(SECURE_ELEMENT_IS_SE050)
+  return _secureElement.serialNumber(sn, length);
+#else
+  if (sn == nullptr || length < SE_SN_LENGTH) {
+    return 0;
+  }
+  uint8_t tmp[12];
+  if (!_secureElement.serialNumber(tmp)) {
+    return 0;
+  }
+  memcpy(sn, tmp, SE_SN_LENGTH);
+  return 1;
+#endif
+}
+
diff --git a/src/SecureElement.h b/src/SecureElement.h
index 94c5188..6dc8581 100644
--- a/src/SecureElement.h
+++ b/src/SecureElement.h
@@ -37,6 +37,14 @@
 #define SE_SHA256_BUFFER_LENGTH  32
 #define SE_CERT_BUFFER_LENGTH  1024
 
+#if defined(SECURE_ELEMENT_IS_SE050)
+  #define SE_SN_LENGTH SE05X_SN_LENGTH
+#elif defined(SECURE_ELEMENT_IS_ECCX08)
+  #define SE_SN_LENGTH 9
+#elif defined(SECURE_ELEMENT_IS_SOFTSE)
+  #define SE_SN_LENGTH 6
+#endif
+
 /******************************************************************************
  * CLASS DECLARATION
  ******************************************************************************/
@@ -52,6 +60,7 @@ class SecureElement
 
   inline int serialNumber(byte sn[]) { return _secureElement.serialNumber(sn); }
   inline String serialNumber() { return _secureElement.serialNumber(); }
+  int serialNumber(byte sn[], size_t length);
 
   inline long random(long min, long max) { return this->_secureElement.random(min, max); };
   inline long random(long max) { return this->_secureElement.random(max); };