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Add support FIPS #54

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Merged
merged 1 commit into from
Aug 25, 2023
Merged

Add support FIPS #54

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17 changes: 14 additions & 3 deletions src/commoncode/hash.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,8 @@

import binascii
import hashlib
import sys
from functools import partial

from commoncode.codec import bin_to_num
from commoncode.codec import urlsafe_b64encode
Expand Down Expand Up @@ -51,12 +53,21 @@ def intdigest(self):
return hasher


# for FIPS support
sys_v0 = sys.version_info[0]
sys_v1 = sys.version_info[1]
if sys_v0 == 3 and sys_v1 >= 9:
md5_hasher = partial(hashlib.md5, usedforsecurity=False)
else:
md5_hasher = hashlib.md5


# Base hashers for each bit size
_hashmodules_by_bitsize = {
# md5-based
32: _hash_mod(32, hashlib.md5),
64: _hash_mod(64, hashlib.md5),
128: _hash_mod(128, hashlib.md5),
32: _hash_mod(32, md5_hasher),
64: _hash_mod(64, md5_hasher),
128: _hash_mod(128, md5_hasher),
# sha-based
160: _hash_mod(160, hashlib.sha1),
256: _hash_mod(256, hashlib.sha256),
Expand Down