def scrypt(password, salt, N=SCRYPT_N, r=SCRYPT_r, p=SCRYPT_p, olen=64):
"""Returns a key derived using the scrypt key-derivarion function
N must be a power of two larger than 1 but no larger than 2 ** 63 (insane)
r and p must be positive numbers such that r * p < 2 ** 30
The default values are:
N -- 2**14 (~16k)
r -- 8
p -- 1
Memory usage is proportional to N*r. Defaults require about 16 MiB.
Time taken is proportional to N*p. Defaults take <100ms of a recent x86.
The last one differs from libscrypt defaults, but matches the 'interactive'
work factor from the original paper. For long term storage where runtime of
key derivation is not a problem, you could use 16 as in libscrypt or better
yet increase N if memory is plentiful.
"""
check_args(password, salt, N, r, p, olen)
try:
return _scrypt(password=password, salt=salt, N=N, r=r, p=p, buflen=olen)
except:
raise ValueError
def scrypt(password, salt, N=SCRYPT_N, r=SCRYPT_r, p=SCRYPT_p, olen=64):
"""Returns a key derived using the scrypt key-derivarion function
N must be a power of two larger than 1 but no larger than 2 ** 63 (insane)
r and p must be positive numbers such that r * p < 2 ** 30
The default values are:
N -- 2**14 (~16k)
r -- 8
p -- 1
Memory usage is proportional to N*r. Defaults require about 16 MiB.
Time taken is proportional to N*p. Defaults take <100ms of a recent x86.
The last one differs from libscrypt defaults, but matches the 'interactive'
work factor from the original paper. For long term storage where runtime of
key derivation is not a problem, you could use 16 as in libscrypt or better
yet increase N if memory is plentiful.
"""
check_args(password, salt, N, r, p, olen)
try:
return _scrypt(password=password,
salt=salt,
N=N,
r=r,
p=p,
buflen=olen)
except:
raise ValueError
import numbers
try:
from scrypt import hash as _scrypt
except ImportError:
raise
except:
raise ImportError('scrypt module failed to import')
from . import mcf as mcf_mod
from .common import *
# scrypt < 0.6 doesn't support hash length
try:
_scrypt(b'password', b'NaCl', N=2, r=1, p=1, buflen=42)
except TypeError:
raise ImportError('scrypt module version unsupported, 0.6+ required')
def scrypt(password, salt, N=SCRYPT_N, r=SCRYPT_r, p=SCRYPT_p, olen=64):
"""Returns a key derived using the scrypt key-derivarion function
N must be a power of two larger than 1 but no larger than 2 ** 63 (insane)
r and p must be positive numbers such that r * p < 2 ** 30
The default values are:
N -- 2**14 (~16k)
r -- 8
p -- 1
"""Scrypt implementation that calls into the 'scrypt' python module"""
try:
from scrypt import hash as _scrypt
except ImportError:
raise
except:
raise ImportError('scrypt module failed to import')
from . import mcf as mcf_mod
from .common import (SCRYPT_N, SCRYPT_r, SCRYPT_p, SCRYPT_MCF_PREFIX_DEFAULT,
check_args)
# scrypt < 0.6 doesn't support hash length
try:
_scrypt(b'password', b'NaCl', N=2, r=1, p=1, buflen=42)
except TypeError:
raise ImportError('scrypt module version unsupported, 0.6+ required')
def scrypt(password, salt, N=SCRYPT_N, r=SCRYPT_r, p=SCRYPT_p, olen=64):
"""Returns a key derived using the scrypt key-derivarion function
N must be a power of two larger than 1 but no larger than 2 ** 63 (insane)
r and p must be positive numbers such that r * p < 2 ** 30
The default values are:
N -- 2**14 (~16k)
r -- 8
p -- 1