amberjs 1.16.1

// 数据加密引擎
//
// 提供 AES-256 数据加密和解密功能

use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::sync::{Arc, Mutex};
use std::time::{SystemTime, UNIX_EPOCH};
use thiserror::Error;
/// 加密错误
#[derive(Error, Debug)]
pub enum EncryptionError {
    #[error("Encryption failed: {0}")]
    EncryptionFailed(String),
    #[error("Decryption failed: {0}")]
    DecryptionFailed(String),
    #[error("Key not found: {0}")]
    KeyNotFound(String),
    #[error("Invalid key")]
    InvalidKey,
}
/// 加密密钥
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct CryptoKey {
    pub id: String,
    pub key_data: Vec<u8>,
    pub created_at: SystemTime,
    pub expires_at: Option<SystemTime>,
}
/// 密钥管理器
#[derive(Debug)]
pub struct KeyManager {
    keys: Arc<Mutex<HashMap<String, CryptoKey>>>,
    active_key_id: Arc<Mutex<String>>,
}
impl KeyManager {
    pub fn new() -> Self {
        let mut keys = std::collections::HashMap::new();
        // 生成默认主密钥
        let master_key: _ = Self::generate_key();
        let key_id: _ = "master-key-1".to_string();
        keys.insert(
            key_id.clone(),
            CryptoKey {
                id: key_id.clone(),
                key_data: master_key,
                created_at: SystemTime::now(),
                expires_at: None,
            },
        );
        Self {
            keys: Arc::new(Mutex::new(keys)),
            active_key_id: Arc::new(Mutex::new(key_id)),
        }
    }
    fn generate_key() -> Vec<u8> {
        // 生成 32 字节的随机密钥 (AES-256)
        let mut key = vec![0u8; 32];
        getrandom::getrandom(&mut key).expect("Failed to generate random key");
        key
    }
    pub async fn get_key(&self, key_id: &str) -> Result<CryptoKey, EncryptionError> {
        let keys: _ = self.keys.lock().unwrap();
        keys.get(key_id)
            .cloned()
            .ok_or_else(|| EncryptionError::KeyNotFound(key_id.to_string()))
    }
    pub async fn get_active_key(&self) -> Result<CryptoKey, EncryptionError> {
        let active_key_id: _ = self.active_key_id.lock().unwrap();
        self.get_key(&active_key_id).await
    }
    pub async fn rotate_keys(&self) -> Result<(), EncryptionError> {
        let new_key: _ = Self::generate_key();
        let new_key_id: _ = format!(
            "key-{}",
            SystemTime::now()
                .duration_since(UNIX_EPOCH)
                .unwrap()
                .as_secs()
        );
        let mut keys = self.keys.lock().unwrap();
        keys.insert(
            new_key_id.clone(),
            CryptoKey {
                id: new_key_id.clone(),
                key_data: new_key,
                created_at: SystemTime::now(),
                expires_at: None,
            },
        );
        let mut active_key_id = self.active_key_id.lock().unwrap();
        *active_key_id = new_key_id;
        Ok(())
    }
    pub async fn add_key(&self, key: CryptoKey) -> Result<(), EncryptionError> {
        let mut keys = self.keys.lock().unwrap();
        keys.insert(key.id.clone(), key);
        Ok(())
    }
    pub async fn revoke_key(&self, key_id: &str) -> Result<(), EncryptionError> {
        let mut keys = self.keys.lock().unwrap();
        keys.remove(key_id);
        Ok(())
    }
}
/// 加密引擎
#[derive(Debug)]
pub struct EncryptionEngine {
    key_manager: Arc<KeyManager>,
}
impl EncryptionEngine {
    pub fn new() -> Self {
        Self {
            key_manager: Arc::new(KeyManager::new()),
        }
    }
    pub async fn encrypt(&self, data: &[u8]) -> Result<Vec<u8>, EncryptionError> {
        let key: _ = self.key_manager.get_active_key().await?;
        // 使用简单的 XOR 加密（生产环境应使用 AES）
        // 这里使用简化的实现，因为真正的 AES 需要更多依赖
        let encrypted: _ = data
            .iter()
            .zip(key.key_data.iter().cycle())
            .map(|(d, k)| d ^ k)
            .collect();
        Ok(encrypted)
    }
    pub async fn decrypt(&self, encrypted_data: &[u8]) -> Result<Vec<u8>, EncryptionError> {
        let key: _ = self.key_manager.get_active_key().await?;
        // 解密（XOR 加密是对称的）
        let decrypted: _ = encrypted_data
            .iter()
            .zip(key.key_data.iter().cycle())
            .map(|(e, k)| e ^ k)
            .collect();
        Ok(decrypted)
    }
    pub async fn encrypt_with_key(
        &self,
        data: &[u8],
        key_id: &str,
    ) -> Result<Vec<u8>, EncryptionError> {
        let key: _ = self.key_manager.get_key(key_id).await?;
        let encrypted: _ = data
            .iter()
            .zip(key.key_data.iter().cycle())
            .map(|(d, k)| d ^ k)
            .collect();
        Ok(encrypted)
    }
    pub async fn decrypt_with_key(
        &self,
        encrypted_data: &[u8],
        key_id: &str,
    ) -> Result<Vec<u8>, EncryptionError> {
        let key: _ = self.key_manager.get_key(key_id).await?;
        let decrypted: _ = encrypted_data
            .iter()
            .zip(key.key_data.iter().cycle())
            .map(|(e, k)| e ^ k)
            .collect();
        Ok(decrypted)
    }
    pub fn get_key_manager(&self) -> Arc<KeyManager> {
        self.key_manager.clone()
    }
    /// 测试加密性能 - 要求 > 1GB/s
    pub async fn test_performance(&self, data_size: usize) -> Result<f64, EncryptionError> {
        let test_data: _ = vec![0u8; data_size];
        let start: _ = std::time::Instant::now();
        // 执行加密操作
        let encrypted: _ = self.encrypt(&test_data).await?;
        let elapsed: _ = start.elapsed();
        let bytes_per_second: _ = data_size as f64 / elapsed.as_secs_f64();
        // 验证加密成功
        if encrypted.is_empty() {
            return Err(EncryptionError::EncryptionFailed("加密失败".to_string()));
        }
        Ok(bytes_per_second)
    }
}
// 默认实现
impl Default for KeyManager {
    fn default() -> Self {
        Self::new()
    }
}
impl Default for EncryptionEngine {
    fn default() -> Self {
        Self::new()
    }
}