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Added python-only fallback for SHA-256 and SHA-512

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Mark Qvist 2022-06-08 21:03:58 +02:00
parent 86061f9f47
commit c46b98f163
4 changed files with 240 additions and 3 deletions
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20
RNS/Cryptography/Hashes.py
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@ -1,4 +1,18 @@
import hashlib
import importlib
if importlib.util.find_spec('hashlib') != None:
import hashlib
else:
hashlib = None
if hasattr(hashlib, "sha512"):
from hashlib import sha512 as ext_sha512
else:
from .SHA512 import sha512 as ext_sha512
if hasattr(hashlib, "sha256"):
from hashlib import sha256 as ext_sha256
else:
from .SHA256 import sha256 as ext_sha256
"""
The SHA primitives are abstracted here to allow platform-
@ -8,13 +22,13 @@ calls in RNS end up here.
"""
def sha256(data):
digest = hashlib.sha256()
digest = ext_sha256()
digest.update(data)
return digest.digest()
def sha512(data):
digest = hashlib.sha512()
digest = ext_sha512()
digest.update(data)
return digest.digest()