feat(sdk): add JNI bridge between Java NativeBridge and Rust C ABI

java/craftlabs-auth-bitanswer/src/main/java/cn/craftlabs/auth/bitanswer/BitAnswerProvider.java

@@ -18,7 +18,7 @@ import cn.craftlabs.auth.internal.NativeBridge;
  */
 public final class BitAnswerProvider implements AuthProvider {
     static {
-        System.loadLibrary("craftlabs_auth_bitanswer");
+        System.loadLibrary("craftlabs_auth_core");
     }
 
     private long nativeHandle;

native/craft-core/build.rs

@@ -16,7 +16,6 @@ fn main() {
     let out_dir = PathBuf::from(env::var("OUT_DIR").unwrap());
     fs::write(out_dir.join("build_hash.txt"), format!("{}\n", hash_hex)).unwrap();
 
-    // 嵌入 RSA 公钥（用于 selfhosted 验签）
     let pubkey_path = PathBuf::from(&manifest_dir).join("embedded").join("pubkey.pem");
     if let Ok(pubkey) = fs::read_to_string(&pubkey_path) {
         let trimmed = pubkey.trim();

native/craft-core/jni_bridge.c

@@ -0,0 +1,45 @@
+/* JNI bridge — connects Java NativeBridge to Rust C ABI
+ * Compile: gcc -shared -fPIC -I$JAVA_HOME/include -I$JAVA_HOME/include/darwin
+ *   -I native/include -o libcraftlabs_jni_bridge.so jni_bridge.c -L. -lcraftlabs_auth_core
+ *
+ * Then: java -Djava.library.path=. ... loads both libraries.
+ * Or rename the output to craftlabs_auth_core and load it directly.
+ */
+#include <jni.h>
+#include "craftlabs_auth.h"
+
+JNIEXPORT jlong JNICALL Java_cn_craftlabs_auth_internal_NativeBridge_nativeInitialize(
+    JNIEnv *env, jclass clazz, jstring configJson) {
+    const char *utf = (*env)->GetStringUTFChars(env, configJson, NULL);
+    jlong handle = (jlong)(intptr_t)craft_initialize(utf);
+    (*env)->ReleaseStringUTFChars(env, configJson, utf);
+    return handle;
+}
+
+JNIEXPORT void JNICALL Java_cn_craftlabs_auth_internal_NativeBridge_nativeDestroy(
+    JNIEnv *env, jclass clazz, jlong handle) {
+    (void)env; (void)clazz;
+    if (handle) craft_destroy((AuthHandle)(intptr_t)handle);
+}
+
+JNIEXPORT jobject JNICALL Java_cn_craftlabs_auth_internal_NativeBridge_nativeActivate(
+    JNIEnv *env, jclass clazz, jlong handle, jstring licenseKey) {
+    (void)clazz;
+    const char *key = (*env)->GetStringUTFChars(env, licenseKey, NULL);
+    AuthResult r = craft_activate((AuthHandle)(intptr_t)handle, key);
+    (*env)->ReleaseStringUTFChars(env, licenseKey, key);
+    jclass cls = (*env)->FindClass(env, "cn/craftlabs/auth/AuthResult");
+    jmethodID ctor = (*env)->GetMethodID(env, cls, "<init>", "(ZLjava/lang/String;)V");
+    jstring msg = (*env)->NewStringUTF(env, r.message ? r.message : "");
+    return (*env)->NewObject(env, cls, ctor, r.success ? JNI_TRUE : JNI_FALSE, msg);
+}
+
+JNIEXPORT jobject JNICALL Java_cn_craftlabs_auth_internal_NativeBridge_nativeCheckLicense(
+    JNIEnv *env, jclass clazz, jlong handle) {
+    (void)clazz;
+    AuthResult r = craft_check_license((AuthHandle)(intptr_t)handle);
+    jclass cls = (*env)->FindClass(env, "cn/craftlabs/auth/AuthResult");
+    jmethodID ctor = (*env)->GetMethodID(env, cls, "<init>", "(ZLjava/lang/String;)V");
+    jstring msg = (*env)->NewStringUTF(env, r.message ? r.message : "");
+    return (*env)->NewObject(env, cls, ctor, r.success ? JNI_TRUE : JNI_FALSE, msg);
+}

native/craft-core/src/lib.rs

@@ -9,7 +9,6 @@ mod session;
 pub mod crypto;
 pub mod device;
 pub mod provider_selfhosted;
-
 use trait_provider::{Provider, ActivateResponse, HeartbeatResponse, LicenseStatus};
 use provider_selfhosted::SelfHostedProvider;