esp32s2: update copyright notice in signature test

components/esp_hw_support/test/digital_signature_test_cases_4096.h

@@ -1,5 +1,10 @@
-/* File generated by gen_digital_signature_tests.py */
-
+/*
+ * SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * File generated by gen_digital_signature_tests.py
+ */
 #define NUM_HMAC_KEYS 3
 
 static const uint8_t test_hmac_keys[NUM_HMAC_KEYS][32] = {

components/esp_hw_support/test/gen_digital_signature_tests.py

@@ -1,5 +1,8 @@
 #!/usr/bin/env python3
+# SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Apache-2.0
 
+import datetime
 import hashlib
 import hmac
 import os
@@ -52,7 +55,14 @@ hmac_keys = [os.urandom(32) for x in range(NUM_HMAC_KEYS)]
 messages = [random.randrange(0, 1 << 4096) for x in range(NUM_MESSAGES)]
 
 with open('digital_signature_test_cases.h', 'w') as f:
-    f.write('/* File generated by gen_digital_signature_tests.py */\n\n')
+    f.write('/*\n')
+    year = datetime.datetime.now().year
+    f.write(' * SPDX-FileCopyrightText: {year} Espressif Systems (Shanghai) CO LTD\n'.format(year=year))
+    f.write(' *\n')
+    f.write(' * SPDX-License-Identifier: Apache-2.0\n')
+    f.write(' *\n')
+    f.write(' * File generated by gen_digital_signature_tests.py\n')
+    f.write(' */\n')
 
     # Write out HMAC keys
     f.write('#define NUM_HMAC_KEYS %d\n\n' % NUM_HMAC_KEYS)