def _pbkdf2_looper(keyed_hmac, digest, rounds):
hexlify = _hexlify
accum = int(hexlify(digest), 16)
for _ in irange(rounds - 1):
digest = keyed_hmac(digest)
accum ^= int(hexlify(digest), 16)
return int_to_bytes(accum, len(digest))
def _pbkdf2_looper(keyed_hmac, digest, rounds):
hexlify = _hexlify
accum = int(hexlify(digest), 16)
for _ in irange(rounds - 1):
digest = keyed_hmac(digest)
accum ^= int(hexlify(digest), 16)
return int_to_bytes(accum, len(digest))
def gen():
for i in irange(block_count):
digest = prf_func(secret, salt + pack(">L", i+1))
accum = bytes_to_int(digest)
for _ in irange(rounds-1):
digest = prf_func(secret, digest)
accum ^= bytes_to_int(digest)
yield int_to_bytes(accum, digest_size)
def gen():
for i in irange(block_count):
digest = prf_func(secret, salt + pack(">L", i+1))
accum = bytes_to_int(digest)
for _ in irange(rounds-1):
digest = prf_func(secret, digest)
accum ^= bytes_to_int(digest)
yield int_to_bytes(accum, digest_size)
def gen():
for i in irange(block_count):
digest = keyed_prf(salt + pack(">L", i + 1))
accum = bytes_to_int(digest)
# speed-critical loop of pbkdf2
# NOTE: currently converting digests to integers since that XORs faster.
for _ in irange(rounds - 1):
digest = keyed_prf(digest)
accum ^= bytes_to_int(digest)
yield int_to_bytes(accum, digest_size)
def gen():
for i in irange(block_count):
digest = keyed_prf(salt + pack(">L", i+1))
accum = bytes_to_int(digest)
# speed-critical loop of pbkdf2
# NOTE: currently converting digests to integers since that XORs faster.
for _ in irange(rounds-1):
digest = keyed_prf(digest)
accum ^= bytes_to_int(digest)
yield int_to_bytes(accum, digest_size)
def des_encrypt_block(key, input):
"""do traditional encryption of a single DES block
:arg key: 8 byte des key
:arg input: 8 byte plaintext
:returns: 8 byte ciphertext
all values must be :class:`bytes`
"""
if not isinstance(key, bytes):
raise TypeError("key must be bytes, not %s" % (type(key),))
if len(key) == 7:
key = expand_des_key(key)
assert len(key) == 8
if not isinstance(input, bytes):
raise TypeError("input must be bytes, not %s" % (type(input),))
assert len(input) == 8
input = bytes_to_int(input)
key = bytes_to_int(key)
out = mdes_encrypt_int_block(key, input, 0, 1)
return int_to_bytes(out, 8)