def stretchkey(passwd, salt, count):
"""Streach a key. H(pass+salt)
"""
assert count > 0
# Hash once with both
inithsh = sha256_func()
inithsh.update(passwd)
inithsh.update(salt)
# Expecting it in binary form; NOT HEX FORM
hsh = inithsh.digest()
# Rehash
for i in xrange(count):
t = sha256_func()
t.update(hsh)
hsh = t.digest()
return hsh
def stretchkey(passwd, salt, count):
"""Streach a key. H(pass+salt)
"""
assert count > 0
# Hash once with both
inithsh = sha256_func()
inithsh.update(passwd)
inithsh.update(salt)
# Expecting it in binary form; NOT HEX FORM
hsh = inithsh.digest()
# Rehash
for i in xrange(count):
t = sha256_func()
t.update(hsh)
hsh = t.digest()
return hsh
def _regen_hpprime(self):
"""Regenerate H(P')
Save the SHA256 of self.pprime.
"""
hsh = sha256_func()
hsh.update(self.pprime)
self.hpprime = hsh.digest()
log.debug("Set H(P') to % s" % repr(self.hpprime))
assert self.check_password()
def _regen_hpprime(self):
"""Regenerate H(P')
Save the SHA256 of self.pprime.
"""
hsh = sha256_func()
hsh.update(self.pprime)
self.hpprime = hsh.digest()
log.debug("Set H(P') to %s" % repr(self.hpprime))
assert self.check_password()
def stretchkey(passwd, salt, count):
"""
Stretch a key. H(pass+salt)
@param passwd: The password being stretched
@type passwd: string
@param salt: Salt for the password. Should pre-provided random data.
@type salt: string
@param count: The number of times to repeat the stretch function
@type count: int
"""
assert count > 0
# Hash once with both
inithsh = sha256_func()
inithsh.update(passwd)
inithsh.update(salt)
# Expecting it in binary form; NOT HEX FORM
hsh = inithsh.digest()
# Rehash
for i in range(count):
t = sha256_func()
t.update(hsh)
hsh = t.digest()
return hsh
def stretchkey(passwd, salt, count):
"""
Stretch a key. H(pass+salt)
@param passwd: The password being stretched
@type passwd: string
@param salt: Salt for the password. Should pre-provided random data.
@type salt: string
@param count: The number of times to repeat the stretch function
@type count: int
"""
assert count > 0
# Hash once with both
inithsh = sha256_func()
inithsh.update(passwd)
inithsh.update(salt)
# Expecting it in binary form; NOT HEX FORM
hsh = inithsh.digest()
# Rehash
for i in xrange(count):
t = sha256_func()
t.update(hsh)
hsh = t.digest()
return hsh
def check_password(self):
"""Check that the hash in self.pprime matches what's in the password safe. True if password matches hash in hpprime. False otherwise"""
hsh = sha256_func()
hsh.update(self.pprime)
return hsh.digest() == self.hpprime
def check_password(self):
"""Check that the hash in self.pprime matches whats in the password safe. True if password matches hash in hpprime. False otherwise"""
hsh = sha256_func()
hsh.update(self.pprime)
return hsh.digest() == self.hpprime
