def new(key, mode=MODE_ECB, IV=None, counter=None, segment_size=None):
"""Create a new cipher object
DES using pycrypto for algo and pycryptoplus for ciphermode
key = raw string containing the keys
mode = python_AES.MODE_ECB/CBC/CFB/OFB/CTR/CMAC, default is ECB
IV = IV as a raw string, default is "all zero" IV
-> only needed for CBC mode
counter = counter object (CryptoPlus.Util.util.Counter)
-> only needed for CTR mode
segment_size = amount of bits to use from the keystream in each chain part
-> supported values: multiple of 8 between 8 and the blocksize
of the cipher (only per byte access possible), default is 8
-> only needed for CFB mode
EXAMPLES:
**********
IMPORTING:
-----------
>>> from CryptoPlus.Cipher import DES
EXAMPLE (test vectors from NESSIE):
-----------------------------------
>>> cipher = DES.new(('7CA110454A1A6E57').decode('hex'))
>>> ciphertext = cipher.encrypt(('01A1D6D039776742').decode('hex'))
>>> (ciphertext).encode('hex')
'690f5b0d9a26939b'
>>> plaintext = cipher.decrypt(ciphertext)
>>> (plaintext).encode('hex')
'01a1d6d039776742'
"""
return DES(key, mode, IV, counter, segment_size)
def __init__(self, userproject, parameters, project_meta):
self.parameters = self.PARAMETERS
self.parameters.update(parameters)
self.userproject = userproject
meta_workunit_bits, str_patterns = project_meta.split(",")
meta_workunit_bits = int(meta_workunit_bits)
assert meta_workunit_bits == self.parameters[
"WORKUNIT_BITS"], "workunit bits disagrees between server and local config"
patterns = []
while len(str_patterns):
pattern = str_patterns[:16].decode('hex')
assert len(pattern) == 8
patterns.append(pattern)
str_patterns = str_patterns[16:]
self.patterns = patterns
self.nr_cores = self.parameters["NR_CORES"]
self.waiting = True
self.workunits = []
self.workunits_finished = []
assert len(patterns) <= self.parameters["NR_PATTERNS"]
# fill with dummy entries
patterns += ["\0" * 8
] * (self.parameters["NR_PATTERNS"] - len(patterns))
self.cores = []
for i in range(self.nr_cores):
c = DES(i, self.parameters["WORKUNIT_BITS"])
self.cores.append(c)
self.des = self.cores[:]
self.res = RES(self.parameters["NR_PATTERNS"], self.res_event)
self.cores.append(self.res)
