Add randompin API for security

Change-Id: If75a6bd46d9030c0d33e72de9114aaa79793b446
Signed-off-by: youngman <yman.jung@samsung.com>

4 files changed, 172 insertions, 8 deletions

diff --git a/include/iotcon.h b/include/iotcon.h
index 738aa50..fb29fa7 100644
--- a/include/iotcon.h
+++ b/include/iotcon.h
@@ -195,6 +195,68 @@ int iotcon_polling_set_interval(int interval);
 int iotcon_polling_invoke(void);
 
 /**
+ * @brief Specifies the type of function passed to iotcon_add_generated_pin_cb().
+ * @details When a provisioning tool calls the function for registering this device,
+ * it is called, immediately.
+ *
+ * @since_tizen 3.0
+ *
+ * @param[in] pin The pin number which is generated automatically
+ * @param[in] user_data The user data to pass to the function
+ *
+ * @pre The callback must be registered using iotcon_add_generated_pin_cb()
+ *
+ * @see iotcon_add_generated_pin_cb()
+ * @see iotcon_remove_generated_pin_cb()
+ */
+typedef void (*iotcon_generated_pin_cb)(const char *pin, void *user_data);
+
+/**
+ * @brief Adds callback to show pin number which is generated automatically.
+ * @details When a provisioning tool tries to register this device using random pin based\n
+ * ownership transfer method, it makes pin number which is generated automatically be shown.
+ *
+ * @since_tizen 3.0
+ *
+ * @param[in] cb The callback function to invoke
+ * @param[in] user_data The user data to pass to the function
+ *
+ * @return 0 on success, otherwise a negative error value.
+ * @retval #IOTCON_ERROR_NONE Successful
+ * @retval #IOTCON_ERROR_NOT_SUPPORTED  Not supported
+ * @retval #IOTCON_ERROR_INVALID_PARAMETER Invalid parameter
+ * @retval #IOTCON_ERROR_ALREADY Already done
+ * @retval #IOTCON_ERROR_OUT_OF_MEMORY Out of memory
+ *
+ * @pre iotcon_initialize() should be called to initialize.
+ * @post When the device is registered by provisioning tool, iotcon_generated_pin_cb() will be called.
+ *
+ * @see iotcon_remove_generated_pin_cb()
+ */
+int iotcon_add_generated_pin_cb(iotcon_generated_pin_cb cb, void *user_data);
+
+/**
+ * @brief Removes callback to show pin number which is generated automatically.
+ * @details If this function is called, @a cb will be not called anymore.\n
+ * For removing @a cb that is used at iotcon_add_generated_pin_cb() should be used.
+ *
+ * @since_tizen 3.0
+ *
+ * @param[in] cb The callback function to invoke
+ *
+ * @return 0 on success, otherwise a negative error value.
+ * @retval #IOTCON_ERROR_NONE Successful
+ * @retval #IOTCON_ERROR_NOT_SUPPORTED  Not supported
+ * @retval #IOTCON_ERROR_INVALID_PARAMETER Invalid parameter
+ * @retval #IOTCON_ERROR_NO_DATA No data available
+ *
+ * @pre iotcon_initialize() should be called to initialize.
+ *
+ * @see iotcon_add_generated_pin_cb()
+ */
+int iotcon_remove_generated_pin_cb(iotcon_generated_pin_cb cb);
+
+/**
  * @}
  */
 
diff --git a/src/ic-ioty.c b/src/ic-ioty.c
index b0724d2..fdf0892 100644
--- a/src/ic-ioty.c
+++ b/src/ic-ioty.c
@@ -47,9 +47,16 @@
 #include "ic-ioty-ocprocess.h"
 #include "ic-cbor.h"
 
+typedef struct {
+	iotcon_generated_pin_cb cb;
+	void *user_data;
+} icl_generated_pin_cb_container_s;
+
 static bool icl_state;
+static bool icl_is_set_generated_pin_cb;
 static char icl_svr_db_file[PATH_MAX];
 static OCPersistentStorage icl_ioty_ps;
+static GList *icl_generated_pin_cb_list;
 
 void icl_ioty_deinit(pthread_t thread)
 {
@@ -131,18 +138,84 @@ int icl_ioty_set_persistent_storage(const char *file_path, bool is_pt)
 	return IOTCON_ERROR_NONE;
 }
 
-void show_pin(char *pin, size_t length)
+static void _generated_pin_cb(char *pin, size_t length)
 {
-	FN_CALL;
+	GList *node;
+	icl_generated_pin_cb_container_s *container;
 
+	if (NULL == pin) {
+		ERR("Invalid Pin Number");
+		return;
+	}
 	INFO("PIN : %s", pin);
+
+	for (node = icl_generated_pin_cb_list; node; node = node->next) {
+		container = node->data;
+		if (container->cb)
+			container->cb(pin, container->user_data);
+	}
 }
 
-int icl_ioty_set_generate_pin_cb()
+static icl_generated_pin_cb_container_s* _find_generated_pin_cb(
+		iotcon_generated_pin_cb cb)
 {
-	FN_CALL;
+	GList *node;
+	icl_generated_pin_cb_container_s *container;
+
+	for (node = icl_generated_pin_cb_list; node; node = node->next) {
+		container = node->data;
+		if (cb == container->cb)
+			return container;
+	}
+
+	return NULL;
+}
+
+int icl_ioty_add_generated_pin_cb(iotcon_generated_pin_cb cb, void *user_data)
+{
+	icl_generated_pin_cb_container_s *container;
+
+	if (_find_generated_pin_cb(cb)) {
+		ERR("This callback is already registered.");
+		return IOTCON_ERROR_ALREADY;
+	}
+
+	container = calloc(1, sizeof(icl_generated_pin_cb_container_s));
+	if (NULL == container) {
+		ERR("calloc() Fail(%d)", errno);
+		return IOTCON_ERROR_OUT_OF_MEMORY;
+	}
+	container->cb = cb;
+	container->user_data = user_data;
 
-	SetGeneratePinCB(&show_pin);
+	icl_generated_pin_cb_list = g_list_append(icl_generated_pin_cb_list, container);
+
+	if (false == icl_is_set_generated_pin_cb) {
+		SetGeneratePinCB(&_generated_pin_cb);
+		icl_is_set_generated_pin_cb = true;
+	}
+
+	return IOTCON_ERROR_NONE;
+}
+
+int icl_ioty_remove_generated_pin_cb(iotcon_generated_pin_cb cb)
+{
+	icl_generated_pin_cb_container_s *container;
+
+	container = _find_generated_pin_cb(cb);
+	if (NULL == container) {
+		ERR("This callback is not registered");
+		return IOTCON_ERROR_NO_DATA;
+	}
+
+	if (1 == g_list_length(icl_generated_pin_cb_list)) {
+		ERR("It is required at least one function");
+		return IOTCON_ERROR_INVALID_PARAMETER;
+	}
+
+	icl_generated_pin_cb_list = g_list_remove(icl_generated_pin_cb_list, container);
+
+	free(container);
 
 	return IOTCON_ERROR_NONE;
 }
@@ -180,9 +253,6 @@ int icl_ioty_init(pthread_t *out_thread)
 		return ic_ioty_parse_oic_error(ret);
 	}
 
-	// TODO: temp code
-	icl_ioty_set_generate_pin_cb();
-
 	icl_ioty_ocprocess_start();
 
 	pthread_attr_init(&attr);
diff --git a/src/ic-ioty.h b/src/ic-ioty.h
index dbd02eb..182f9fd 100644
--- a/src/ic-ioty.h
+++ b/src/ic-ioty.h
@@ -46,6 +46,8 @@ void icl_ioty_deinit(pthread_t thread);
 int icl_ioty_init(pthread_t *out_thread);
 
 int icl_ioty_set_persistent_storage(const char *file_path, bool is_pt);
+int icl_ioty_add_generated_pin_cb(iotcon_generated_pin_cb cb, void *user_data);
+int icl_ioty_remove_generated_pin_cb(iotcon_generated_pin_cb cb);
 
 int icl_ioty_set_device_info(const char *device_name);
 int icl_ioty_set_platform_info();
diff --git a/src/ic.c b/src/ic.c
index 9754725..8cb3d32 100644
--- a/src/ic.c
+++ b/src/ic.c
@@ -125,4 +125,34 @@ API int iotcon_set_timeout(int timeout_seconds)
 	return IOTCON_ERROR_NONE;
 }
 
+API int iotcon_add_generated_pin_cb(iotcon_generated_pin_cb cb, void *user_data)
+{
+	int ret;
+
+	RETV_IF(false == ic_utils_check_ocf_feature(), IOTCON_ERROR_NOT_SUPPORTED);
+	RETV_IF(NULL == cb, IOTCON_ERROR_INVALID_PARAMETER);
+
+	ret = icl_ioty_add_generated_pin_cb(cb, user_data);
+	if (IOTCON_ERROR_NONE != ret) {
+		ERR("icl_ioty_set_generate_pin_cb() Fail(%d)", ret);
+		return ret;
+	}
+
+	return IOTCON_ERROR_NONE;
+}
 
+API int iotcon_remove_generated_pin_cb(iotcon_generated_pin_cb cb)
+{
+	int ret;
+
+	RETV_IF(false == ic_utils_check_ocf_feature(), IOTCON_ERROR_NOT_SUPPORTED);
+	RETV_IF(NULL == cb, IOTCON_ERROR_INVALID_PARAMETER);
+
+	ret = icl_ioty_remove_generated_pin_cb(cb);
+	if (IOTCON_ERROR_NONE != ret) {
+		ERR("icl_ioty_remove_generated_pin_cb() Fail(%d)", ret);
+		return ret;
+	}
+
+	return IOTCON_ERROR_NONE;
+}