Mailman 3 March 2022 - Cryptography-dev

[Cryptography] yan-blockCipher (encryption base upon yan multiplication )
by valerio March 24, 2022

March 24, 2022

we develop new symmetric encryption algorithm this algorithm base upon yan theorem yan theorem a * b = u | l l/a = b 439 * 827 = 363 | 053 053 / 439 = 827 NOTE : yan block-cipher use yan 9 encryption algorithm (M+K1)*K2=C decryption algorithm (C/K2)-K1 = M we know that gcd(...) use to recover key in multiplication encryption K = gcd(C!,C2,C3,..) but gcd(...) don't work on yan division brute force attack work when you know one of them M, K otherwise you trap in yan cycle python program for testing purpose https://github.com/valerio7s/yan-crypto/blob/725e58ed5e907df6ae0901226f0409… manual cmd k for key e for encryption d for decryption default key 1 example >k 4567878764321761 4567878764321761 >e 1235464674897411 7753210264056092 >d 7753210264056092 1235464674897411

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Binary wheels for armv7l
by Pēteris Caune March 18, 2022

March 18, 2022

Hello, I'd like to bring up the topic of binary wheel packages for armv7l. They have already been discussed before, for example in this issue: https://github.com/pyca/cryptography/issues/6286 Quoting reaperhulk's comment from the issue: > Getting armv7l in hosted CI isn't really possible at this time and armv7l systems tend to be very low performance compared to their aarch64 brethren. We won't ship wheels for platforms we don't directly test, so that's the primary obstacle here. I develop a Python project which uses cryptography, and was revisiting the topic of building armv7l docker images that include cryptography. In the past I had resorted to using piwheels prebuilt wheels but looks like I managed to build it from source on GitHub Actions. Here's a quick summary on how it works: - My project is hosted on GitHub, and has a GHA workflow to automatically build and publish a docker docker image on every release - On GHA, you can build armv7l images by using docker buildx: https://github.com/docker/setup-buildx-action - But there's a bug in ... QEMU, if I understand correctly, which causes cryptography build to fail: https://github.com/rust-lang/cargo/issues/8719 - That bug is not fixed, but there is a workaround, which is even packaged up as a reusable GHA action: https://github.com/marketplace/actions/docker-on-tmpfs By using that workaround, I got cryptography to compile for armv7l with no errors. It took a long time to complete, but I'm not making releases often, so that's fine by me. For reference, here's my GHA workflow: https://github.com/healthchecks/healthchecks/blob/master/.github/workflows/… I have no idea if it would be practical or feasible to integrate this technique in the cryptography build process (so an official wheel can be built), but I thought I would share this in case somebody is interested to investigate it. If there's no resources or interest to support this, I fully understand. Pēteris

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PyCA cryptography 36.0.2 released
by Paul Kehrer March 15, 2022

March 15, 2022

PyCA cryptography 36.0.2 has been released to PyPI. cryptography includes both high level recipes and low level interfaces to common cryptographic algorithms such as symmetric ciphers, asymmetric algorithms, message digests, X509, key derivation functions, and much more. We support Python 3.6+, and PyPy3. Changelog (https://cryptography.io/en/latest/changelog/#v36-0-2): * Updated Windows, macOS, and Linux wheels to be compiled with OpenSSL 1.1.1n. -Paul Kehrer (reaperhulk)

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Certificates with RSASSA_PSS
by Doran, Andrew March 8, 2022

March 8, 2022

Hi, We are using the cryptography module with pyWinRM to run PowerShell scripts on Windows servers from Linux. We have a situation where this fails because of a certificate issue. If we edit oid.py to add:- SignatureAlgorithmOID.RSASSA_PSS: hashes.SHA256() to the dictionary _SIG_OIDS_TO_HASH, then everything works just fine. Are you planning to add this algorythm so that we can juts use an updated module?

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