Drop openssl dep

[kderme]

With this pr, ouroboros-consensus no longer needs openssl to build. This significantly simplifies building on windows. Related #1082

WIP: TODO nix

[dcoutts]

Assuming those fromIntegral conversions are not needed on any platform then this looks fine.

[mrBliss]

Tip:

nix-prefetch-git https://github.com/input-output-hk/cardano-crypto 2547ad1e80aeabca2899951601079408becbc92c
Initialized empty Git repository in /tmp/git-checkout-tmp-mn30nsyu/cardano-crypto-2547ad1/.git/
remote: Enumerating objects: 104, done.
remote: Counting objects: 100% (104/104), done.
remote: Compressing objects: 100% (92/92), done.
remote: Total 104 (delta 5), reused 68 (delta 2), pack-reused 0
Receiving objects: 100% (104/104), 152.66 KiB | 873.00 KiB/s, done.
Resolving deltas: 100% (5/5), done.
From https://github.com/input-output-hk/cardano-crypto
 * branch            HEAD       -> FETCH_HEAD
Switched to a new branch 'fetchgit'
removing `.git'...

git revision is 2547ad1e80aeabca2899951601079408becbc92c
path is /nix/store/bvxsj0yv59b5k3yzsgbl2082i97lc5z8-cardano-crypto-2547ad1
git human-readable version is -- none --
Commit date is 2020-02-18 09:14:29 +0800
hash is 1p2kg2w02q5w1cvqzhfhqmxviy4xrzada3mmb096j2n6hfr20kri
{
  "url": "https://github.com/input-output-hk/cardano-crypto",
  "rev": "2547ad1e80aeabca2899951601079408becbc92c",
  "date": "2020-02-18T09:14:29+08:00",
  "sha256": "1p2kg2w02q5w1cvqzhfhqmxviy4xrzada3mmb096j2n6hfr20kri",
  "fetchSubmodules": false
}

So 1p2kg2w02q5w1cvqzhfhqmxviy4xrzada3mmb096j2n6hfr20kri is the right value here

[kderme]

Right, I should stop abusing ci to give me the correct hash :)

[mrBliss]

Unrelated to this PR: I actually find it a bit strange that we list a dependency on cardano-crypto in cabal.project but not in stack.yaml 😕

[kderme]

Unrelated to this PR: I actually find it a bit strange that we list a dependency on cardano-crypto in cabal.project but not in stack.yaml

Hm it's actually specified in the resolver wrapper:
https://raw.githubusercontent.com/input-output-hk/cardano-prelude/3893f21db1665e7bab9e8c6504c547fc7c28f98c/snapshot.yaml

Why do we need this?

[mrBliss]

Unrelated to this PR: I actually find it a bit strange that we list a dependency on cardano-crypto in cabal.project but not in stack.yaml

Hm it's actually specified in the resolver wrapper:
https://raw.githubusercontent.com/input-output-hk/cardano-prelude/3893f21db1665e7bab9e8c6504c547fc7c28f98c/snapshot.yaml

Why do we need this?

I guess it's an inconsistency in cardano-prelude. The cardano-crypto dependency is not needed in that project. On the other hand, that snapshot.yaml is used for downstream projects, which means they automatically get this dependency. IMO, we should remove it from snapshot.yaml for consistency.

[mrBliss]

@kderme FYI: IntersectMBO/cardano-prelude#100

[mrBliss]

bors r+

[iohk-bors]

Build succeeded

• ci/hydra:Cardano:ouroboros-network:required
• buildkite/ouroboros-network