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Hashlib-like truncated sha512/256 object

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shortcutme 2017-10-03 15:22:05 +02:00
parent 936371a7ec
commit 8d26a572dd
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1 changed files with 17 additions and 14 deletions
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31
src/Crypt/CryptHash.py
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@ -44,20 +44,23 @@ def random(length=64, encoding="hex"):
return hashlib.sha512(os.urandom(256)).hexdigest()[0:length] return hashlib.sha512(os.urandom(256)).hexdigest()[0:length]
# Sha512 truncated to 256bits
class Sha512t:
def __init__(self, data):
if data:
self.sha512 = hashlib.sha512(data)
else:
self.sha512 = hashlib.sha512()
if __name__ == "__main__": def hexdigest(self):
import cStringIO as StringIO return self.sha512.hexdigest()[0:64]
a = StringIO.StringIO()
a.write("hello!")
a.seek(0)
print hashlib.sha1("hello!").hexdigest()
print sha1sum(a)
import time def digest(self):
s = time.time() return self.sha512.digest()[0:32]
print sha1sum(open("F:\\Temp\\bigfile")),
print time.time() - s
s = time.time() def update(self, data):
print sha512sum(open("F:\\Temp\\bigfile")), return self.sha512.update(data)
print time.time() - s
def sha512t(data=None):
return Sha512t(data)