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fix: handle Unicode in Adler-32 checksum #15692

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fix: handle Unicode in Adler-32 checksum #15692

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16 changes: 12 additions & 4 deletions hashes/adler32.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,18 +13,26 @@

def adler32(plain_text: str) -> int:
"""
Function implements adler-32 hash.
Iterates and evaluates a new value for each character
Return the Adler-32 checksum of a string encoded as UTF-8.

>>> adler32('Algorithms')
363791387

>>> adler32('go adler em all')
708642122

>>> adler32('€100')
196018850

>>> adler32('日本語テスト')
2053180537

>>> adler32('')
1
"""
a = 1
b = 0
for plain_chr in plain_text:
a = (a + ord(plain_chr)) % MOD_ADLER
for plain_byte in plain_text.encode("utf-8"):
a = (a + plain_byte) % MOD_ADLER
b = (b + a) % MOD_ADLER
return (b << 16) | a
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