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PyCrypto - The Python Cryptography Toolkit Random number generationHere is the current list of known random number generation issues/bugsthat have been found in previous versions of PyCrypto:. In versions prior to v2.6.1, Crypto.Random was insecure when using fork in some cases.See thefor more information. It is recommended that users upgrade to PyCrypto v2.6.1 or later. In versions prior to v2.1.0, Crypto.Util.randpool.RandomPool was unsafe as commonly used.It was not thread-safe or fork-safe at all, and it was not always properlyseeded with entropy. This was by design, but most application developerssimply read from it without any further thought, resulting in insecureapplications.It is now is deprecated, and will be removed in a futurerelease; Use Crypto.Random or os.urandom instead.Keeping an entropy pool in auser-space program is complex and error-prone. It is especially difficult todo reliably in a generic crypto library, and it isfor to be.Hopefully, operating systems will one day provide random number generationfacilities that are sufficiently fast, trustworthy, and reliable that theycan completely replace the multitude of user-space random number generatorsthat currently plague our software.
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Download the latest releaseThe latest stable release is available here:.The latest experimental release is available here:.SHA256 sums: f2ce1e989b272cfcb677616763e0a2e7ec659effa67a88aa92b3a65528f60a3c.pycrypto-2.6.1.tar.gzc2ab0516ccae75e2aa6f6e0f32a7799f3b89f467dc1b.pycrypto-2.6.1.tar.gz.ascee4013e297e6a5da5c9f49a3e38dc8a5c62ae816377aa766c9e87474197be3b9.pycrypto-2.7a1.tar.gz7ca210c3bc1c9f75c9d638a6235cacef8f8129fb61879e2f336e1a.pycrypto-2.7a1.tar.gz.asc Documentation. (epydoc output).ContributingBugs and feature requests are tracked on. If you are interested in contributing, please join the.The source code is now managed on. Clone it using by running the following command: git clone Submitting patchesIn an effort to clarify PyCrypto's licensing terms and export controlstatus, all new patch submissions must meet the requirementsset out in the document, '.Once you have confirmed that you meet the 'Code Submission Requirements'above, please send me a push request on GitHub. Alternatively, you can sendyour patches to the mailing list.Tips for getting your patches accepted:. Don't needlessly break compatibility with older versions ofPyCrypto. Patches that break compatibility with older version ofPyCrypto, especially PyCrypto 2.0.1, will need an explanation about whyit's worth breaking compatibility.
Exception: Removing buggy code thatnobody uses is fine. Don't needlessly break compatibility with older versions ofPython. Run the test suite using Python 2.1 and the latest version ofPython 2.x. Don't needlessly add complexity.
The more complex the code is,the harder it is to maintain, and the more likely it is to have bugs. Don't needlessly add features. X.509 doesn't belongin PyCrypto. Or anywhere, really. Don't create copyright headaches. It took me the better part ofa year to sort out the licensing ambiguities in PyCrypto 2.0.1. If you'readding new files, include the standard PyCrypto public domain dedication atthe top.
Whatever you do in fastmath.c, also do in slowmath.py.PyCrypto has two math libraries: one that depends on libgmp, and onethat doesn't. They need to be kept synchronized with each other. Make small, incremental, well-documented changes. Your commitmessages should be clear and detailed. Include any applicable backgroundinformation.
Your patches should do one thing. Your code should havesensible comments.Export of cryptography softwareThe export of cryptography software is (still) governed by arms controlregulations in Canada, the United States, and elsewhere. The export orre-export of this software may be regulated by law in your country.
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