build system: include SHA256 hash of ELF file into app_desc structure

examples/get-started/blink/example_test.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+import re
+import os
+import sys
+import hashlib
+
+try:
+    import IDF
+except ImportError:
+    # This environment variable is expected on the host machine
+    test_fw_path = os.getenv("TEST_FW_PATH")
+    if test_fw_path and test_fw_path not in sys.path:
+        sys.path.insert(0, test_fw_path)
+
+    import IDF
+
+import Utility
+
+
+def verify_elf_sha256_embedding(dut):
+    elf_file = os.path.join(dut.app.binary_path, "blink.elf")
+    sha256 = hashlib.sha256()
+    with open(elf_file, "rb") as f:
+        sha256.update(f.read())
+    sha256_expected = sha256.hexdigest()
+
+    dut.reset()
+    sha256_reported = dut.expect(re.compile(r'ELF file SHA256:\s+([a-f0-9]+)'), timeout=5)[0]
+
+    Utility.console_log('ELF file SHA256: %s' % sha256_expected)
+    Utility.console_log('ELF file SHA256 (reported by the app): %s' % sha256_reported)
+    # the app reports only the first several hex characters of the SHA256, check that they match
+    if not sha256_expected.startswith(sha256_reported):
+        raise ValueError('ELF file SHA256 mismatch')
+
+
+@IDF.idf_example_test(env_tag="Example_WIFI")
+def test_examples_blink(env, extra_data):
+    dut = env.get_dut("blink", "examples/get-started/blink")
+    binary_file = os.path.join(dut.app.binary_path, "blink.bin")
+    bin_size = os.path.getsize(binary_file)
+    IDF.log_performance("blink_bin_size", "{}KB".format(bin_size // 1024))
+    IDF.check_performance("blink_bin_size", bin_size // 1024)
+
+    dut.start_app()
+
+    verify_elf_sha256_embedding(dut)
+
+
+if __name__ == '__main__':
+    test_examples_blink()