1 files changed, 14 insertions, 19 deletions
diff --git a/onlineupdate/source/update/updater/gen_cert_header.py b/onlineupdate/source/update/updater/gen_cert_header.py
index 5fff9be79084..5b70758db3f2 100755
--- a/onlineupdate/source/update/updater/gen_cert_header.py
+++ b/onlineupdate/source/update/updater/gen_cert_header.py
@@ -1,27 +1,22 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import sys
 import binascii
 
-def file_byte_generator(filename, block_size = 512):
-  with open(filename, "rb") as f:
-    while True:
-      block = f.read(block_size)
-      if block:
-        for byte in block:
-          yield byte
-      else:
-        break
+def file_byte_generator(filename):
+    with open(filename, "rb") as f:
+        block = f.read()
+        return block
 
 def create_header(array_name, in_filename):
-  hexified = ["0x" + binascii.hexlify(byte) for byte in file_byte_generator(in_filename)]
-  print("const uint8_t " + array_name + "[] = {")
-  print(", ".join(hexified))
-  print("};")
-  return 0
+    hexified = ["0x" + binascii.hexlify(bytes([inp])).decode('ascii') for inp in file_byte_generator(in_filename)]
+    print("const uint8_t " + array_name + "[] = {")
+    print(", ".join(hexified))
+    print("};")
+    return 0
 
 if __name__ == '__main__':
-  if len(sys.argv) < 3:
-    print('ERROR: usage: gen_cert_header.py array_name in_filename')
-    sys.exit(1);
-  sys.exit(create_header(sys.argv[1], sys.argv[2]))
+    if len(sys.argv) < 3:
+        print('ERROR: usage: gen_cert_header.py array_name in_filename')
+        sys.exit(1);
+    sys.exit(create_header(sys.argv[1], sys.argv[2]))