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bpo-45155: Apply new byteorder default values for int.to/from_bytes (GH-28465)

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Raymond Hettinger 2021-09-20 13:22:55 -05:00 • committed by GitHub
parent 5846c9b71e
commit 9510e6f3c7
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5 changed files with 15 additions and 15 deletions
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6
Lib/base64.py
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@ -182,7 +182,7 @@ def _b32encode(alphabet, s):
from_bytes = int.from_bytes
b32tab2 = _b32tab2[alphabet]
for i in range(0, len(s), 5):
c = from_bytes(s[i: i + 5], 'big')
c = from_bytes(s[i: i + 5]) # big endian
encoded += (b32tab2[c >> 30] + # bits 1 - 10
b32tab2[(c >> 20) & 0x3ff] + # bits 11 - 20
b32tab2[(c >> 10) & 0x3ff] + # bits 21 - 30
@ -234,13 +234,13 @@ def _b32decode(alphabet, s, casefold=False, map01=None):
acc = (acc << 5) + b32rev[c]
except KeyError:
raise binascii.Error('Non-base32 digit found') from None
decoded += acc.to_bytes(5, 'big')
decoded += acc.to_bytes(5) # big endian
# Process the last, partial quanta
if l % 8 or padchars not in {0, 1, 3, 4, 6}:
raise binascii.Error('Incorrect padding')
if padchars and decoded:
acc <<= 5 * padchars
last = acc.to_bytes(5, 'big')
last = acc.to_bytes(5) # big endian
leftover = (43 - 5 * padchars) // 8 # 1: 4, 3: 3, 4: 2, 6: 1
decoded[-5:] = last[:leftover]
return bytes(decoded)