BLS12-381 bindings (#266)

Bindings in Haskell for curve BLS12-381 operations. End goal is to add BLS12-381 bindings to Plutus, following [CIP-0381](https://github.com/cardano-foundation/CIPs/tree/master/CIP-0381). Bindings based in the [blst](https://github.com/supranational/blst) library. 

Co-authored-by: iquerejeta <querejeta.azurmendi@iohk.io>
Co-authored-by: Moritz Angermann <moritz.angermann@gmail.com>
Co-authored-by: Alexey Kuleshevich <alexey.kuleshevich@iohk.io>

.github/workflows/build-blst.bash

@@ -0,0 +1,10 @@
+#!/bin/bash
+# I don't understand why this just vanishes.
+export PATH=/usr/bin:$PATH
+
+mkdir blst-sources && cd blst-sources
+git clone https://github.com/supranational/blst
+cd blst
+git reset --hard $BLST_REF
+./build.sh
+cd ../..

.github/workflows/haskell.yml

@@ -43,6 +43,8 @@ jobs:
 
       # current ref from: 27.02.2022
       SECP256K1_REF: ac83be33d0956faf6b7f61a60ab524ef7d6a473a
+      # current ref from: 25.11.2022
+      BLST_REF: 03b5124029979755c752eec45f3c29674b558446
 
       # Modify this value to "invalidate" the secp cache.
       SECP_CACHE_VERSION: "2023-03-22"
@@ -96,6 +98,17 @@ jobs:
       if: runner.os == 'macOS'
       run: brew install autoconf automake libtool
 
+    - name: "WINDOWS: Install blst"
+      if: runner.os == 'Windows'
+      env:
+        MSYS2_PATH_TYPE: inherit
+        MSYSTEM: MINGW64
+      run: C:\\msys64\\usr\\bin\\bash.exe .github/workflows/build-blst.bash
+
+    - name: "NON-WINDOWS: Install blst"
+      if: runner.os != 'Windows'
+      run: .github/workflows/build-blst.bash
+
     - name: Install secp256k1
       uses: input-output-hk/setup-secp256k1@v1
       with:
@@ -140,21 +153,30 @@ jobs:
         # The tests call out to msys2 commands. We generally do not want to mix toolchains, so
         # we are very deliberate about only adding msys64 to the path where absolutely necessary.
         ${{ (runner.os == 'Windows' && '$env:PATH=("C:\msys64\mingw64\bin;{0}" -f $env:PATH)') || '' }}
-        cabal build all --enable-tests --only-dependencies
+        cabal build all --enable-tests --only-dependencies -j --ghc-option=-j4
 
-    - name: Build
-      run: |
-        # The tests call out to msys2 commands. We generally do not want to mix toolchains, so
-        # we are very deliberate about only adding msys64 to the path where absolutely necessary.
-        ${{ (runner.os == 'Windows' && '$env:PATH=("C:\msys64\mingw64\bin;{0}" -f $env:PATH)') || '' }}
-        cabal build all --enable-tests
+    - name: Build [WIN - testing]
+      if: runner.os == 'Windows'
+      run: cabal build all --enable-tests --extra-lib-dirs ${env:GITHUB_WORKSPACE}/blst-sources/blst -j --ghc-option=-j4
+
+    - name: Build [non-WIN - testing]
+      if: runner.os != 'Windows'
+      run: cabal build all --enable-tests --extra-lib-dirs ${GITHUB_WORKSPACE}/blst-sources/blst -j
 
-    - name: Run tests
+    - name: Run tests [WIN]
+      if: runner.os == 'Windows'
+      env:
+        MSYS2_PATH_TYPE: inherit
+        MSYSTEM: MINGW64
       run: |
         # The tests call out to msys2 commands. We generally do not want to mix toolchains, so
         # we are very deliberate about only adding msys64 to the path where absolutely necessary.
         ${{ (runner.os == 'Windows' && '$env:PATH=("C:\msys64\mingw64\bin;{0}" -f $env:PATH)') || '' }}
-        cabal test all --enable-tests --test-show-details=direct -j1 -v3
+        cabal test all --enable-tests --test-show-details=direct -j1 --extra-lib-dirs ${env:GITHUB_WORKSPACE}/blst-sources/blst
+
+    - name: Run tests [non-WIN]
+      if: runner.os != 'Windows'
+      run: cabal test all --enable-tests --test-show-details=direct -j1 --extra-lib-dirs ${GITHUB_WORKSPACE}/blst-sources/blst
 
     - uses: actions/upload-artifact@v3
       with:
@@ -177,6 +199,7 @@ jobs:
     # and will silently fail if msys2 is not in path. See the "Run tests" step.
     #
     # - name: Setup tmate session
+    #   if: ${{ failure() }}
     #   uses: mxschmitt/action-tmate@v3
     #   with:
     #     limit-access-to-actor: true

cabal.project

@@ -36,3 +36,4 @@ test-show-details: direct
 
 program-options
   ghc-options: -Werror
+

cardano-crypto-class/CHANGELOG.md

@@ -1,3 +1,6 @@
+## 2.1.1.0
+* Included bindings to `blst` library to enable operations over curve BLS12-381
+
 ## 2.1.0.1
 
 * Remove `development` flag: #372

cardano-crypto-class/cardano-crypto-class.cabal

@@ -1,6 +1,6 @@
 cabal-version:      2.2
 name:               cardano-crypto-class
-version:            2.1.0.1
+version:            2.1.1.0
 synopsis:
   Type classes abstracting over cryptography primitives for Cardano
 
@@ -19,6 +19,8 @@ category:           Currency
 build-type:         Simple
 extra-source-files: README.md
                     CHANGELOG.md
+extra-source-files:  cbits/blst.h
+                  ,  cbits/blst_aux.h
 
 flag secp256k1-support
     description: Enable support for functions from libsecp256k1. Requires
@@ -45,6 +47,8 @@ library
     Cardano.Crypto.DSIGN.Ed448
     Cardano.Crypto.DSIGN.Mock
     Cardano.Crypto.DSIGN.NeverUsed
+    Cardano.Crypto.EllipticCurve.BLS12_381
+    Cardano.Crypto.EllipticCurve.BLS12_381.Internal
     Cardano.Crypto.Hash
     Cardano.Crypto.Hash.Blake2b
     Cardano.Crypto.Hash.Class
@@ -90,7 +94,7 @@ library
     , aeson
     , base
     , base16-bytestring  >=1
-    , bytestring
+    , bytestring >= 0.11
     , cardano-binary >= 1.6
     , cardano-strict-containers
     , cryptonite
@@ -121,6 +125,9 @@ library
     pkgconfig-depends: libsecp256k1 -any
     cpp-options: -DSECP256K1_ENABLED
 
+  extra-libraries: blst
+  c-sources: cbits/blst_util.c
+
 test-suite test-memory-example
   import:         base, project-config
   -- Temporarily removing this as it is breaking the CI, and