Add linuxArm64 target

[vdshb]

This is a proposal to support native Arm64 Linux. Artifacts might be build on Linux/Mac X64/Arm64 without additional testing. I believe providing artifacts without additional testing is better than nothing for tier-3 targets. I don't know though, whether connecting openssl to this new target challanging or not.

[whyoleg]

Hey, thanks for creating an issue for this!
Theoretically I can add support for ALL K/N targets to core and random modules, but it will be not really helpful. The main task here, as you noted, is building openssl for linuxArm64.
On current moment I have a setup to build OpenSSL v3 here: https://github.com/whyoleg/openssl-builds
It uses Conan, to fetch or build specific version for platform (handles all cross-compilation problems for me). But I haven't tried to build for ARM linux...
Last time I had some problems to update that repository to use latest version of Conan and OpenSSL, but let's try one more time :)
If you have any other ideas on how to build openssl for all those targets (I mean, there are a lot) - feel free to share it here.

[vdshb]

Unfortunately I have no idea how to properly build OpenSSL on different platforms. My background is primarily on JVM, and experience in C is just related to KMP babysteps.

[whyoleg]

FYI, I was able to successfully build OpenSSL for Linux ARM64 and added it in separate branch. Builds are green: https://github.com/whyoleg/cryptography-kotlin/actions/runs/6876806793
So at least, it builds. So most likely it will be supported starting from next release.

BTW, do you have a use case for Linux ARM64?

[vdshb]

BTW, do you have a use case for Linux ARM64?

Sorry for the delay. I'm creating a set of libraries (not yet published) with the support of all available architectures. Even AndroidNative if it's easy to add. As I don't yet build actual applications on Arm64, I believe correct formal answer for now is "No, I don't actually have use cases for Linux ARM64". But I have raspberry PI and I'd like to have a possibility to build some of my planned apps to this target. Arm64 servers are also on my radar as a potential target.

[whyoleg]

Thanks!
I will see what I can do with support for all other K/N targets, may be it will be possible to provide some support there.

[whyoleg]

One more bump here:
I was able to build OpenSSL for all K/N targets (including tvOS, watchOS and androidNative). Linking test binaries works.
Build result: https://github.com/whyoleg/cryptography-kotlin/actions/runs/6978229057

Hopefully, I will prepare new release in coming days which will include this.

[whyoleg]

0.3.0 with this and other features is released! Sorry that it took so long.