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"""
Functions for computing various hashes of files and strings.
"""
from __future__ import division
import hashlib
for _algo in hashlib.algorithms_guaranteed:
def _closure():
hash = hashlib.__dict__[_algo]
def file(p):
h = hash()
fd = open(p, 'rb')
while True:
s = fd.read(4096)
if not s:
break
h.update(s)
fd.close()
return h
def sum(s):
return hash(s)
filef = lambda x: file(x).digest()
filef.__doc__ = 'Calculates the %s sum of a file' % _algo
sumf = lambda x: sum(x).digest()
sumf.__doc__ = 'Calculates the %s sum of a string' % _algo
fileh = lambda x: file(x).hexdigest()
fileh.__doc__ = 'Calculates the %s sum of a file; returns hex-encoded' % _algo
sumh = lambda x: sum(x).hexdigest()
sumh.__doc__ = 'Calculates the %s sum of a string; returns hex-encoded' % _algo
return filef, sumf, fileh, sumh
(globals()[_algo + 'file'],
globals()[_algo + 'sum'],
globals()[_algo + 'filehex'],
globals()[_algo + 'sumhex']) = _closure()
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