skf-rs 0.8.1

Rust wrapper for GM/T 0016-2012(Smart token cryptography application interface specification).
Documentation 
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//!
//! Helper functions for use this library easily
//!
use crate::{AppAttr, Result, SkfApp, SkfContainer, SkfDevice};
use tracing::warn;

/// Open or create application by it name
///
/// [device] - The device instance
///
/// [name] - The application name
///
/// [attr_fn] - A function to provide application attribute ,used when application is not exist
pub fn open_or_create_app(
    device: &dyn SkfDevice,
    name: &str,
    attr_fn: fn() -> AppAttr,
) -> Result<Box<dyn SkfApp>> {
    let list = device.enumerate_app_name()?;
    if list.contains(&name.to_string()) {
        return device.open_app(name);
    }
    device.create_app(name, &attr_fn())
}

/// Create application, If application exist, delete it first
///
/// [device] - The device instance
///
/// [name] - The application name
///
/// [attr_fn] - A function to provide application attribute
pub fn recreate_app(
    device: &dyn SkfDevice,
    name: &str,
    attr_fn: fn() -> AppAttr,
) -> Result<Box<dyn SkfApp>> {
    let list = device.enumerate_app_name()?;
    if list.contains(&name.to_string()) {
        device.delete_app(name)?;
    }
    device.create_app(name, &attr_fn())
}

/// Open or create container by container name
///
/// [app] - The application instance
///
/// [name] - The container name
pub fn open_or_create_container(app: &dyn SkfApp, name: &str) -> Result<Box<dyn SkfContainer>> {
    let list = app.enumerate_container_name()?;
    if list.contains(&name.to_string()) {
        return app.open_container(name);
    }
    app.create_container(name)
}

/// Create container, If container exist, delete it first
///
/// [app] - The application instance
///
/// [name] - The container name
pub fn recreate_container(app: &dyn SkfApp, name: &str) -> Result<Box<dyn SkfContainer>> {
    let list = app.enumerate_container_name()?;
    if list.contains(&name.to_string()) {
        app.delete_container(name)?;
    }
    app.create_container(name)
}

/// A wrapper for SkfApp, clean security state on drop
pub struct SecureApp {
    app: Box<dyn SkfApp>,
}

impl SecureApp {
    pub fn app(&self) -> &Box<dyn SkfApp> {
        &self.app
    }
}

impl SecureApp {
    pub fn new(app: Box<dyn SkfApp>) -> Self {
        Self::from(app)
    }
}

impl Drop for SecureApp {
    fn drop(&mut self) {
        if let Err(err) = self.app.clear_secure_state() {
            warn!("Clear secure state failed: err = {}", err);
        }
    }
}

impl From<Box<dyn SkfApp>> for SecureApp {
    fn from(app: Box<dyn SkfApp>) -> Self {
        Self { app }
    }
}