Read whole file at once when hashing

Signed-off-by: Joakim Bech <joakim.bech@linaro.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/patch_mynewt_img.py b/patch_mynewt_img.py
index f77b4e7..7f407b6 100755
--- a/patch_mynewt_img.py
+++ b/patch_mynewt_img.py
@@ -59,8 +59,7 @@ def extend_image(img, img_size):
 def calculate_hash(img):
     sha256 = hashlib.sha256()
     with open(img + ".img", "rb") as f:
-        for chunk in iter(lambda: f.read(4096), b""):
-            sha256.update(chunk)
+            sha256.update(f.read())
     return sha256.hexdigest()