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Diffstat (limited to '.venv/lib/python3.12/site-packages/rsa/parallel.py')
-rw-r--r-- | .venv/lib/python3.12/site-packages/rsa/parallel.py | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/rsa/parallel.py b/.venv/lib/python3.12/site-packages/rsa/parallel.py new file mode 100644 index 00000000..ab992480 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/rsa/parallel.py @@ -0,0 +1,96 @@ +# 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")
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