fix: vendor OpenSSL for aarch64-linux cross-compilation (#4)

Author: pszymkowiak

.github/workflows/release.yml

@@ -66,10 +66,12 @@ jobs:
       - name: Build (cross aarch64)
         if: matrix.target == 'aarch64-unknown-linux-gnu'
         run: |
-          cargo build --release --target ${{ matrix.target }} -p enigma-cli
-          cargo build --release --target ${{ matrix.target }} -p enigma-proxy
+          cargo build --release --target ${{ matrix.target }} -p enigma-cli --features vendored-openssl
+          cargo build --release --target ${{ matrix.target }} -p enigma-proxy --features vendored-openssl
         env:
           CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER: aarch64-linux-gnu-gcc
+          CC_aarch64_unknown_linux_gnu: aarch64-linux-gnu-gcc
+          CXX_aarch64_unknown_linux_gnu: aarch64-linux-gnu-g++
 
       - name: Build
         if: matrix.target != 'aarch64-unknown-linux-gnu'

Cargo.toml

@@ -124,6 +124,9 @@ base64 = "0.22"
 # Hex
 hex = "0.4"
 
+# OpenSSL (vendored for cross-compilation)
+openssl = { version = "0.10", features = ["vendored"] }
+
 # Internal
 enigma-core = { path = "crates/enigma-core" }
 enigma-storage = { path = "crates/enigma-storage" }

crates/enigma-cli/Cargo.toml

@@ -27,8 +27,12 @@ glob = "0.3"
 rpassword = "5"
 hex.workspace = true
 
+# OpenSSL (vendored for cross-compilation)
+openssl = { workspace = true, optional = true }
+
 [features]
 default = []
+vendored-openssl = ["dep:openssl"]
 azure-keyvault = ["enigma-keys/azure-keyvault"]
 gcp-secretmanager = ["enigma-keys/gcp-secretmanager"]
 aws-secretsmanager = ["enigma-keys/aws-secretsmanager"]

crates/enigma-proxy/Cargo.toml

@@ -44,8 +44,12 @@ prometheus = { workspace = true, optional = true }
 # Web UI (optional)
 enigma-web = { workspace = true, optional = true }
 
+# OpenSSL (vendored for cross-compilation)
+openssl = { workspace = true, optional = true }
+
 [features]
 default = []
+vendored-openssl = ["dep:openssl"]
 tls = ["dep:tokio-rustls", "dep:rustls-pemfile", "dep:rustls"]
 metrics = ["dep:prometheus"]
 web = ["dep:enigma-web"]