squash! refactor!: Pull Crypto trait to the high-level implementation

The crypto-* features are removed from edhoc-rs; testing depends on
edhoc-crypto being pulled in in parallel to the test, and a feature
selected on that.

.github/workflows/build-and-test.yml

@@ -28,15 +28,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        crypto_backend: [crypto-hacspec, crypto-psa]
+        crypto_backend: [edhoc-crypto/hacspec, edhoc-crypto/psa]
         ead: [ead-none, ead-zeroconf]
 
     steps:
     - name: Checkout repo
       uses: actions/checkout@v3
 
     - name: Run unit tests # note that we only add `--package edhoc-hacspec` when testing the hacspec version of the lib
-      run: RUST_BACKTRACE=1 cargo test -p edhoc-rs -p edhoc-consts -p edhoc-ead-zeroconf  --no-default-features --features="${{ matrix.crypto_backend }}, ${{ matrix.ead }}" --no-fail-fast -- --test-threads 1
+      run: RUST_BACKTRACE=1 cargo test -p edhoc-rs -p edhoc-crypto -p edhoc-consts -p edhoc-ead-zeroconf  --no-default-features --features="${{ matrix.crypto_backend }}, ${{ matrix.ead }}" --no-fail-fast -- --test-threads 1
 
 
   build-edhoc-package:
@@ -46,7 +46,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        crypto_backend: [crypto-hacspec, crypto-psa, crypto-psa-baremetal, crypto-cryptocell310]
+        crypto_backend: [edhoc-crypto/hacspec, edhoc-crypto/psa, edhoc-crypto/psa-baremetal, edhoc-crypto/cryptocell310]
         ead: [ead-none, ead-zeroconf]
 
     steps:

examples/edhoc-rs-cc2538/Cargo.toml

@@ -8,6 +8,7 @@ description = "edhoc-rs example on CC2538 SoC"
 
 [dependencies]
 edhoc-rs = { path = "../../lib", default-features = false }
+edhoc-crypto = { path = "../../crypto", default-features = false }
 # depend on an allocator
 embedded-alloc = "0.5.0"
 hexlit = "0.5.3"
@@ -20,5 +21,5 @@ rtt-target = { version = "0.3.1", features = ["cortex-m"] }
 
 [features]
 default = [ "psa" ]
-psa = [ "edhoc-rs/crypto-psa-baremetal" ]
+psa = [ "edhoc-crypto/psa-baremetal" ]
 

examples/edhoc-rs-no_std/Cargo.toml

@@ -23,7 +23,7 @@ rtt-target = { version = "0.3.1", features = ["cortex-m"] }
 [features]
 default = [ "rtt", "crypto-cryptocell310", "ead-none" ]
 rtt = [ ]
-crypto-psa = [ "edhoc-rs/crypto-psa-baremetal" ]
-crypto-cryptocell310 = [ "edhoc-rs/crypto-cryptocell310" ]
+crypto-psa = [ "edhoc-crypto/psa-baremetal" ]
+crypto-cryptocell310 = [ "edhoc-crypto/cryptocell310" ]
 ead-none = [ "edhoc-rs/ead-none" ]
 ead-zeroconf = [ "edhoc-rs/ead-zeroconf" ]

lib/Cargo.toml

@@ -24,10 +24,6 @@ edhoc-crypto = { path = "../crypto", default-features = false }
 
 [features]
 default = [ "edhoc-ead/ead-none" ]
-crypto-hacspec = ["hacspec-lib/std", "edhoc-crypto/hacspec" ]
-crypto-psa = [ "edhoc-crypto/psa" ]
-crypto-psa-baremetal = [ "edhoc-crypto/psa-baremetal", "panic-semihosting" ]
-crypto-cryptocell310 = [ "edhoc-crypto/cryptocell310", "panic-semihosting" ]
 ead-none = [ "edhoc-ead/ead-none" ]
 ead-zeroconf = [ "edhoc-ead/ead-zeroconf" ]