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| author | Paul Kehrer <paul.l.kehrer@gmail.com> | 2015-10-22 11:31:20 -0500 |
|---|---|---|
| committer | Paul Kehrer <paul.l.kehrer@gmail.com> | 2015-10-22 11:31:20 -0500 |
| commit | 5af3043b9f8ab5fa2b2e4aa16bba0c00d044055a (patch) | |
| tree | 85083d3d61fbfbf33a6a18dbe328f0c2276dd3f7 /src/cryptography/hazmat/primitives/keywrap.py | |
| parent | 974e875492b750fbbb6505a761a0120f09ff34cc (diff) | |
| download | cryptography-5af3043b9f8ab5fa2b2e4aa16bba0c00d044055a.tar.gz cryptography-5af3043b9f8ab5fa2b2e4aa16bba0c00d044055a.tar.bz2 cryptography-5af3043b9f8ab5fa2b2e4aa16bba0c00d044055a.zip | |
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Diffstat (limited to 'src/cryptography/hazmat/primitives/keywrap.py')
| -rw-r--r-- | src/cryptography/hazmat/primitives/keywrap.py | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/cryptography/hazmat/primitives/keywrap.py b/src/cryptography/hazmat/primitives/keywrap.py index 89925f3d..6e79ab6b 100644 --- a/src/cryptography/hazmat/primitives/keywrap.py +++ b/src/cryptography/hazmat/primitives/keywrap.py @@ -29,8 +29,9 @@ def aes_key_wrap(wrapping_key, key_to_wrap, backend): n = len(r) for j in range(6): for i in range(n): - # every encryption operation is a discrete 16 byte chunk so - # it is safe to reuse the encryptor for the entire operation + # every encryption operation is a discrete 16 byte chunk (because + # AES has a 128-bit block size) and since we're using ECB it is + # safe to reuse the encryptor for the entire operation b = encryptor.update(a + r[i]) # pack/unpack are safe as these are always 64-bit chunks a = struct.pack( |