Add a Rust matcher for OpenID4VCI creation requests

Author: netheril96

matcher-rs/.gitignore

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+/target
+**/*.rs.bk
+/bin/
+pkg/
+wasm-pack.log

matcher-rs/Cargo.lock

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+[package]
+name = "matcher-rs"
+version = "0.1.0"
+authors = ["rensiyuan"]
+edition = "2024"
+build = "build.rs"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+lol_alloc = "0.4.1"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0.145"
+
+[dev-dependencies]
+
+[build-dependencies]
+bindgen = "0.72.1"
+
+[profile.release]
+# Tell `rustc` to optimize for small code size.
+opt-level = "s"
+lto = true

matcher-rs/Cargo.toml

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+use std::env;
+use std::path::PathBuf;
+
+fn main() {
+    println!("cargo:rerun-if-changed=../matcher/credentialmanager.h");
+    println!("cargo:rerun-if-env-changed=TARGET");
+
+    let builder = bindgen::Builder::default()
+        .header("../matcher/credentialmanager.h")
+        .clang_arg("-I/usr/include")
+        .clang_arg("-fvisibility=default")
+        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()));
+
+    let bindings = builder.generate().expect("Unable to generate bindings");
+
+    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
+    bindings
+        .write_to_file(out_path.join("bindings.rs"))
+        .expect("Couldn't write bindings!");
+}

matcher-rs/build.rs

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+use matcher_rs::{credman::CredmanApiImpl, issuance::issuance_main};
+
+fn main() {
+    issuance_main(&mut CredmanApiImpl {}).unwrap();
+}
+
+// Credman expects this as the entry point, but it isn't there if the target is wasm32-unknown-unknown.
+#[cfg(all(target_arch = "wasm32", target_os = "unknown"))]
+#[unsafe(no_mangle)]
+extern "C" fn _start() {
+    main();
+}

matcher-rs/src/bin/issuance.rs

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+#![allow(non_upper_case_globals)]
+#![allow(non_camel_case_types)]
+#![allow(non_snake_case)]
+#![allow(unused)]
+
+include!(concat!(env!("OUT_DIR"), "/bindings.rs"));