kernel：Add Dynamic Signature Configuration

manager/app/src/main/cpp/jni.c

@@ -351,4 +351,47 @@ NativeBridgeNP(getFullVersion, jstring) {
     char buff[255] = { 0 };
     get_full_version((char *) &buff);
     return GetEnvironment()->NewStringUTF(env, buff);
+}
+
+NativeBridge(setDynamicSign, jboolean, jint size, jstring hash) {
+    if (!hash) {
+        LogDebug("setDynamicSign: hash is null");
+        return false;
+    }
+
+    const char* chash = GetEnvironment()->GetStringUTFChars(env, hash, nullptr);
+    bool result = set_dynamic_sign((unsigned int)size, chash);
+    GetEnvironment()->ReleaseStringUTFChars(env, hash, chash);
+
+    LogDebug("setDynamicSign: size=0x%x, result=%d", size, result);
+    return result;
+}
+
+NativeBridgeNP(getDynamicSign, jobject) {
+    struct dynamic_sign_user_config config;
+    bool result = get_dynamic_sign(&config);
+
+    if (!result) {
+        LogDebug("getDynamicSign: failed to get dynamic sign config");
+        return NULL;
+    }
+
+    jclass cls = GetEnvironment()->FindClass(env, "com/sukisu/ultra/Natives$DynamicSignConfig");
+    jmethodID constructor = GetEnvironment()->GetMethodID(env, cls, "<init>", "()V");
+    jobject obj = GetEnvironment()->NewObject(env, cls, constructor);
+
+    jfieldID sizeField = GetEnvironment()->GetFieldID(env, cls, "size", "I");
+    jfieldID hashField = GetEnvironment()->GetFieldID(env, cls, "hash", "Ljava/lang/String;");
+
+    GetEnvironment()->SetIntField(env, obj, sizeField, (jint)config.size);
+    GetEnvironment()->SetObjectField(env, obj, hashField, GetEnvironment()->NewStringUTF(env, config.hash));
+
+    LogDebug("getDynamicSign: size=0x%x, hash=%.16s...", config.size, config.hash);
+    return obj;
+}
+
+NativeBridgeNP(clearDynamicSign, jboolean) {
+    bool result = clear_dynamic_sign();
+    LogDebug("clearDynamicSign: result=%d", result);
+    return result;
 }

manager/app/src/main/cpp/ksu.c

@@ -36,6 +36,11 @@
 #define CMD_ENABLE_KPM 100
 #define CMD_HOOK_TYPE 101
 #define CMD_GET_SUSFS_FEATURE_STATUS 102
+#define CMD_DYNAMIC_SIGN 103
+
+#define DYNAMIC_SIGN_OP_SET 0
+#define DYNAMIC_SIGN_OP_GET 1
+#define DYNAMIC_SIGN_OP_CLEAR 2
 
 static bool ksuctl(int cmd, void* arg1, void* arg2) {
     int32_t result = 0;
@@ -140,3 +145,32 @@ bool get_susfs_feature_status(struct susfs_feature_status* status) {
 
     return ksuctl(CMD_GET_SUSFS_FEATURE_STATUS, status, NULL);
 }
+
+bool set_dynamic_sign(unsigned int size, const char* hash) {
+    if (hash == NULL) {
+        return false;
+    }
+
+    struct dynamic_sign_user_config config;
+    config.operation = DYNAMIC_SIGN_OP_SET;
+    config.size = size;
+    strncpy(config.hash, hash, sizeof(config.hash) - 1);
+    config.hash[sizeof(config.hash) - 1] = '\0';
+
+    return ksuctl(CMD_DYNAMIC_SIGN, &config, NULL);
+}
+
+bool get_dynamic_sign(struct dynamic_sign_user_config* config) {
+    if (config == NULL) {
+        return false;
+    }
+
+    config->operation = DYNAMIC_SIGN_OP_GET;
+    return ksuctl(CMD_DYNAMIC_SIGN, config, NULL);
+}
+
+bool clear_dynamic_sign() {
+    struct dynamic_sign_user_config config;
+    config.operation = DYNAMIC_SIGN_OP_CLEAR;
+    return ksuctl(CMD_DYNAMIC_SIGN, &config, NULL);
+}

manager/app/src/main/cpp/ksu.h

@@ -28,6 +28,16 @@ bool is_lkm_mode();
 #define KSU_MAX_GROUPS 32
 #define KSU_SELINUX_DOMAIN 64
 
+#define DYNAMIC_SIGN_OP_SET 0
+#define DYNAMIC_SIGN_OP_GET 1
+#define DYNAMIC_SIGN_OP_CLEAR 2
+
+struct dynamic_sign_user_config {
+    unsigned int operation;
+    unsigned int size;
+    char hash[65];
+};
+
 // SUSFS Functional State Structures
 struct susfs_feature_status {
     bool status_sus_path;
@@ -109,4 +119,10 @@ bool get_hook_type(char* hook_type, size_t size);
 
 bool get_susfs_feature_status(struct susfs_feature_status* status);
 
+bool set_dynamic_sign(unsigned int size, const char* hash);
+
+bool get_dynamic_sign(struct dynamic_sign_user_config* config);
+
+bool clear_dynamic_sign();
+
 #endif //KERNELSU_KSU_H