Clean up build scripts

This includes:
- Move all build artifacts to target directory, so they will be cleaned with a `cargo clean`
- Remove shell script for building `libgcrypt` and `libgpg-error`. Instead building it within `build.rs`
- Compile needed c functions in sys crate
- Provide bindings in sys crate
- Re-export sys crate in nas-c-lib to make bindings available

Author: Kraemii

rust/Cargo.lock

@@ -7,6 +7,8 @@ license = "GPL-2.0-or-later"
 [workspace.dependencies]
 anyhow = "1.0.75"
 cc = "1.0"
+bindgen = "0.72"
+autotools = "0.2"
 clap = { version = "4.5.27", features = ["derive", "env"] }
 futures = "0.3.30"
 futures-util = "0.3.28"
@@ -73,7 +75,11 @@ pnet = { version = "0.35.0", optional = true }
 pnet_base = { version = "0.35.0", optional = true }
 pnet_macros = { version = "0.35.0", optional = true }
 pnet_macros_support = { version = "0.35.0", optional = true }
-quick-xml = { version = "0.38.1", features = ["serde", "serde-types", "serialize",] }
+quick-xml = { version = "0.38.1", features = [
+    "serde",
+    "serde-types",
+    "serialize",
+] }
 rand = "0.9.2"
 rand_core = "0.6.4"
 rc4 = "0.1.0"
@@ -85,7 +91,9 @@ russh = "0.54.2"
 rustls-native-certs = "0.8.1"
 search_path = "0.1.4"
 sequoia-ipc = "0.36.0"
-sequoia-openpgp = { version = "2.0.0", default-features = false, features = ["crypto-openssl",] }
+sequoia-openpgp = { version = "2.0.0", default-features = false, features = [
+    "crypto-openssl",
+] }
 sha1 = "0.10.5"
 snmp2 = { version = "0.4.8", features = ["full"] }
 socket2 = { version = "0.6.0", features = ["all"] }
@@ -107,7 +115,7 @@ serde = { workspace = true }
 serde_json = { workspace = true }
 sha2 = { workspace = true }
 thiserror = { workspace = true }
-tokio = {workspace = true }
+tokio = { workspace = true }
 tokio-rustls = { workspace = true }
 tracing = { workspace = true }
 tracing-subscriber = { workspace = true }

rust/Cargo.toml

@@ -1,6 +1,6 @@
-[build.env]
-passthrough = ["IN_CROSS=1", "CLEAN=1"]
 [target.aarch64-unknown-linux-gnu]
 dockerfile = "cross_aarch64.Dockerfile"
+[target.aarch64-unknown-linux-gnu.env]
+passthrough = ["CC=aarch64-linux-gnu-gcc", "CHOST=arm64"]
 [target.x86_64-unknown-linux-gnu]
 dockerfile = "cross.Dockerfile"

rust/Cross.toml

@@ -0,0 +1,10 @@
+[package]
+name = "libcrypt-sys"
+version = "0.1.0"
+edition = "2024"
+links = "crypt"
+
+[build-dependencies]
+autotools = { workspace = true }
+cc = { workspace = true }
+bindgen = { workspace = true }

rust/crates/nasl-c-lib/build.rs

@@ -0,0 +1,81 @@
+// SPDX-FileCopyrightText: 2024 Greenbone AG
+//
+// SPDX-License-Identifier: GPL-2.0-or-later WITH x11vnc-openssl-exception
+
+use std::{
+    env,
+    path::{Path, PathBuf},
+    process::Command,
+};
+
+const GPG_ERROR_VERSION: &str = "1.54";
+const LIBGCRYPT_VERSION: &str = "1.10.2";
+
+fn main() {
+    println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo:rerun-if-changed=c/gcrypt_error.c");
+    println!("cargo:rerun-if-changed=c/gcrypt_error.h");
+    println!("cargo:rerun-if-changed=c/gcrypt_mac.c");
+    println!("cargo:rerun-if-changed=c/gcrypt_mac.h");
+    println!("cargo::rerun-if-env-changed=TARGET");
+
+    let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
+    let target = env::var("TARGET").unwrap();
+
+    let path = fetch_source("libgpg-error", GPG_ERROR_VERSION, &out_dir);
+    build_autotools_project(&path, &target);
+
+    let path = fetch_source("libgcrypt", LIBGCRYPT_VERSION, &out_dir);
+    build_autotools_project(&path, &target);
+
+    let include_dir = out_dir.join("include");
+    let lib_dir = out_dir.join("lib");
+
+    println!("cargo:rustc-link-search=native={}", lib_dir.display());
+    println!("cargo:rustc-link-lib=static=gcrypt");
+    println!("cargo:rustc-link-lib=static=gpg-error");
+
+    cc::Build::new()
+        .file("c/gcrypt_mac.c")
+        .file("c/gcrypt_error.c")
+        .include(include_dir)
+        .opt_level(2)
+        .compile("crypt");
+}
+
+fn fetch_source(name: &str, version: &str, destination: &Path) -> PathBuf {
+    let folder_name = format!("{}-{}", name, version);
+    let extract_path = destination.join(&folder_name);
+    let tar_path = extract_path.with_added_extension("tar.bz2");
+
+    if !extract_path.exists() {
+        if !tar_path.exists() {
+            let url = format!("https://gnupg.org/ftp/gcrypt/{name}/{folder_name}.tar.bz2");
+
+            Command::new("curl")
+                .args(["--fail", "-O", &url])
+                .current_dir(destination)
+                .status()
+                .unwrap();
+        }
+
+        Command::new("tar")
+            .args(["-xf", &tar_path.to_string_lossy()])
+            .current_dir(destination)
+            .status()
+            .unwrap();
+    }
+
+    extract_path
+}
+
+fn build_autotools_project(src: &Path, target: &str) -> PathBuf {
+    let mut config = autotools::Config::new(src);
+    config
+        .enable_static()
+        .disable_shared()
+        .config_option("with-pic", None)
+        .host(target);
+
+    config.build()
+}