You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
97 lines
2.3 KiB
97 lines
2.3 KiB
# Copyright 2011 Sybren A. Stüvel <sybren@stuvel.eu>
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# https://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
"""Functions for parallel computation on multiple cores.
|
|
|
|
Introduced in Python-RSA 3.1.
|
|
|
|
.. note::
|
|
|
|
Requires Python 2.6 or newer.
|
|
|
|
"""
|
|
|
|
import multiprocessing as mp
|
|
from multiprocessing.connection import Connection
|
|
|
|
import rsa.prime
|
|
import rsa.randnum
|
|
|
|
|
|
def _find_prime(nbits: int, pipe: Connection) -> None:
|
|
while True:
|
|
integer = rsa.randnum.read_random_odd_int(nbits)
|
|
|
|
# Test for primeness
|
|
if rsa.prime.is_prime(integer):
|
|
pipe.send(integer)
|
|
return
|
|
|
|
|
|
def getprime(nbits: int, poolsize: int) -> int:
|
|
"""Returns a prime number that can be stored in 'nbits' bits.
|
|
|
|
Works in multiple threads at the same time.
|
|
|
|
>>> p = getprime(128, 3)
|
|
>>> rsa.prime.is_prime(p-1)
|
|
False
|
|
>>> rsa.prime.is_prime(p)
|
|
True
|
|
>>> rsa.prime.is_prime(p+1)
|
|
False
|
|
|
|
>>> from rsa import common
|
|
>>> common.bit_size(p) == 128
|
|
True
|
|
|
|
"""
|
|
|
|
(pipe_recv, pipe_send) = mp.Pipe(duplex=False)
|
|
|
|
# Create processes
|
|
try:
|
|
procs = [mp.Process(target=_find_prime, args=(nbits, pipe_send))
|
|
for _ in range(poolsize)]
|
|
# Start processes
|
|
for p in procs:
|
|
p.start()
|
|
|
|
result = pipe_recv.recv()
|
|
finally:
|
|
pipe_recv.close()
|
|
pipe_send.close()
|
|
|
|
# Terminate processes
|
|
for p in procs:
|
|
p.terminate()
|
|
|
|
return result
|
|
|
|
|
|
__all__ = ['getprime']
|
|
|
|
if __name__ == '__main__':
|
|
print('Running doctests 1000x or until failure')
|
|
import doctest
|
|
|
|
for count in range(100):
|
|
(failures, tests) = doctest.testmod()
|
|
if failures:
|
|
break
|
|
|
|
if count % 10 == 0 and count:
|
|
print('%i times' % count)
|
|
|
|
print('Doctests done')
|