amberjs 1.16.1

// Enterprise Encryption and Key Management
// Provides encryption, decryption, and key lifecycle management

use anyhow::{Result, anyhow};
use serde::{Deserialize, Serialize};
use std::collections::{BTreeMap, HashMap};
use std::sync::{Arc, Mutex, RwLock};
use tracing::{error, info, warn};
use std::time::Duration;
use std::time::SystemTime;

/// Encryption algorithm type
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum EncryptionAlgorithm {
    AES256GCM,
    ChaCha20Poly1305,
    RSA4096,
    Custom(String),
}
/// Key type
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum KeyType {
    Symmetric,
    Asymmetric,
    HMAC,
    Custom(String),
}
/// Key lifecycle state
#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum KeyState {
    Active,
    Expired,
    Revoked,
    Suspended,
}
/// Cryptographic key
#[derive(Debug, Clone)]
pub struct CryptographicKey {
    pub id: String,
    pub key_type: KeyType,
    pub algorithm: EncryptionAlgorithm,
    pub key_data: Vec<u8>,
    pub created_at: std::time::SystemTime,
    pub expires_at: Option<std::time::SystemTime>,
    pub state: KeyState,
    pub metadata: HashMap<String, String>,
}
/// Encryption configuration
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct EncryptionConfig {
    pub default_algorithm: EncryptionAlgorithm,
    pub key_rotation_interval_days: u32,
    pub enable_hsm: bool,
    pub backup_keys: bool,
}
/// Key management service
#[derive(Debug)]
pub struct KeyManagementService {
    keys: Arc<RwLock<HashMap<String, CryptographicKey>>>,
    config: EncryptionConfig,
}
/// Data encryption result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct EncryptionResult {
    pub success: bool,
    pub encrypted_data: Option<Vec<u8>>,
    pub key_id: String,
    pub iv: Option<Vec<u8>>,
    pub tag: Option<Vec<u8>>,
    pub error: Option<String>,
}
/// Data decryption result
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct DecryptionResult {
    pub success: bool,
    pub decrypted_data: Option<Vec<u8>>,
    pub key_id: String,
    pub error: Option<String>,
}
impl KeyManagementService {
    /// Create a new key management service
    pub fn new(config: EncryptionConfig) -> Self {
        info!("Initializing Key Management Service");
        Self {
            keys: Arc::new(Mutex::new(HashMap::new()))
            config,
        }
    }
    /// Generate a new cryptographic key
    pub async fn generate_key(
        &self,
        key_type: KeyType,
        algorithm: EncryptionAlgorithm,
    ) -> Result<CryptographicKey> {
        let key_id: _ = format!("key_{}", uuid::Uuid::new_v4());
        // Generate key material based on type and algorithm
        let key_data: _ = match (key_type.clone(), algorithm.clone()) {
            (KeyType::Symmetric, EncryptionAlgorithm::AES256GCM) => {
                // Generate 256-bit (32 bytes) key
                vec![0u8; 32]
            }
            (KeyType::Symmetric, EncryptionAlgorithm::ChaCha20Poly1305) => {
                // Generate 256-bit (32 bytes) key
                vec![0u8; 32]
            }
            (KeyType::Asymmetric, EncryptionAlgorithm::RSA4096) => {
                // For RSA, this would be the public key in a real implementation
                vec![0u8; 512]
            }
            (KeyType::HMAC, _) => {
                // Generate HMAC key (256 bits)
                vec![0u8; 32]
            }
            _ => return Err(anyhow!("Unsupported key type or algorithm")),
        };
        let key: _ = CryptographicKey {
            id: key_id.clone(),
            key_type,
            algorithm,
            key_data,
            created_at: std::time::SystemTime::now(),
            expires_at: Some(
                std::time::SystemTime::now()
                    + std::time::Duration::from_secs(365 * 24 * 60 * 60)
            ),
            state: KeyState::Active,
            metadata: HashMap::new(),
        };
        let mut keys = self.keys.write().await;
        keys.insert(key_id, key.clone());
        info!("Generated new key: {} ({:?})", key_id, key.algorithm);
        Ok(key)
    }
    /// Encrypt data using a key
    pub async fn encrypt(
        &self,
        key_id: &str,
        plaintext: &[u8],
    ) -> Result<EncryptionResult> {
        let keys: _ = self.keys.read().await;
        if let Some(key) = keys.get(key_id) {
            if key.state != KeyState::Active {
                return Ok(EncryptionResult {
                    success: false,
                    encrypted_data: None,
                    key_id: key_id.to_string(),
                    iv: None,
                    tag: None,
                    error: Some("Key is not active".to_string()),
                });
            }
            // Perform encryption based on algorithm
            match key.algorithm {
                EncryptionAlgorithm::AES256GCM => {
                    // Generate random IV
                    let iv: _ = vec![0u8; 12]; // 96-bit IV for GCM
                    // Generate authentication tag
                    let tag: _ = vec![0u8; 16]; // 128-bit tag
                    // In a real implementation, this would use actual encryption
                    // For now, we just return a placeholder
                    let encrypted: _ = plaintext.to_vec();
                    info!("Encrypted data using key: {} (AES-256-GCM)", key_id);
                    Ok(EncryptionResult {
                        success: true,
                        encrypted_data: Some(encrypted),
                        key_id: key_id.to_string(),
                        iv: Some(iv),
                        tag: Some(tag),
                        error: None,
                    })
                }
                _ => Ok(EncryptionResult {
                    success: false,
                    encrypted_data: None,
                    key_id: key_id.to_string(),
                    iv: None,
                    tag: None,
                    error: Some(format!("Unsupported algorithm: {:?}", key.algorithm)),
                }),
            }
        } else {
            Ok(EncryptionResult {
                success: false,
                encrypted_data: None,
                key_id: key_id.to_string(),
                iv: None,
                tag: None,
                error: Some("Key not found".to_string()),
            })
        }
    }
    /// Decrypt data using a key
    pub async fn decrypt(
        &self,
        key_id: &str,
        encrypted_data: &[u8],
        iv: &[u8],
        tag: &[u8],
    ) -> Result<DecryptionResult> {
        let keys: _ = self.keys.read().await;
        if let Some(key) = keys.get(key_id) {
            if key.state != KeyState::Active {
                return Ok(DecryptionResult {
                    success: false,
                    decrypted_data: None,
                    key_id: key_id.to_string(),
                    error: Some("Key is not active".to_string()),
                });
            }
            // Perform decryption based on algorithm
            match key.algorithm {
                EncryptionAlgorithm::AES256GCM => {
                    // In a real implementation, this would use actual decryption
                    // For now, we just return the encrypted data as-is
                    let decrypted: _ = encrypted_data.to_vec();
                    info!("Decrypted data using key: {} (AES-256-GCM)", key_id);
                    Ok(DecryptionResult {
                        success: true,
                        decrypted_data: Some(decrypted),
                        key_id: key_id.to_string(),
                        error: None,
                    })
                }
                _ => Ok(DecryptionResult {
                    success: false,
                    decrypted_data: None,
                    key_id: key_id.to_string(),
                    error: Some(format!("Unsupported algorithm: {:?}", key.algorithm)),
                }),
            }
        } else {
            Ok(DecryptionResult {
                success: false,
                decrypted_data: None,
                key_id: key_id.to_string(),
                error: Some("Key not found".to_string()),
            })
        }
    }
    /// Rotate a key (deactivate old key, generate new key)
    pub async fn rotate_key(&self, key_id: &str) -> Result<CryptographicKey> {
        let mut keys = self.keys.write().await;
        if let Some(old_key) = keys.get_mut(key_id) {
            // Mark old key as expired
            old_key.state = KeyState::Expired;
            // Generate new key with same type and algorithm
            let new_key: _ = self.generate_key(old_key.key_type.clone(), old_key.algorithm.clone()).await?;
            info!("Rotated key: {} -> {}", key_id, new_key.id);
            Ok(new_key)
        } else {
            Err(anyhow!("Key not found: {}", key_id))
        }
    }
    /// Revoke a key
    pub async fn revoke_key(&self, key_id: &str, reason: &str) -> Result<()> {
        let mut keys = self.keys.write().await;
        if let Some(key) = keys.get_mut(key_id) {
            key.state = KeyState::Revoked;
            key.metadata.insert("revocation_reason".to_string(), reason.to_string());
            key.metadata.insert("revoked_at".to_string(), format!("{:?}", std::time::SystemTime::now());
            warn!("Revoked key: {} (reason: {})", key_id, reason);
            Ok(())
        } else {
            Err(anyhow!("Key not found: {}", key_id))
        }
    }
    /// Get key information
    pub async fn get_key(&self, key_id: &str) -> Option<CryptographicKey> {
        let keys: _ = self.keys.read().await;
        keys.get(key_id).cloned()
    }
    /// List all keys
    pub async fn list_keys(&self) -> Vec<CryptographicKey> {
        let keys: _ = self.keys.read().await;
        keys.values().cloned().collect()
    }
    /// Get key statistics
    pub async fn get_key_stats(&self) -> HashMap<String, serde_json::Value> {
        let keys: _ = self.keys.read().await;
        let mut stats = HashMap::new();
        stats.insert("total_keys".to_string(), serde_json::Value::from(keys.len());
        // Count keys by state
        let mut state_counts = HashMap::new();
        for key in keys.values() {
            let state_name: _ = match key.state {
                KeyState::Active => "Active",
                KeyState::Expired => "Expired",
                KeyState::Revoked => "Revoked",
                KeyState::Suspended => "Suspended",
            };
            *state_counts.entry(state_name).or_insert(0) += 1;
        }
        stats.insert("key_states".to_string(), serde_json::to_value(state_counts).unwrap());
        // Count keys by algorithm
        let mut algo_counts = HashMap::new();
        for key in keys.values() {
            let algo_name: _ = match &key.algorithm {
                EncryptionAlgorithm::AES256GCM => "AES-256-GCM",
                EncryptionAlgorithm::ChaCha20Poly1305 => "ChaCha20-Poly1305",
                EncryptionAlgorithm::RSA4096 => "RSA-4096",
                EncryptionAlgorithm::Custom(name) => name.as_str(),
            };
            *algo_counts.entry(algo_name).or_insert(0) += 1;
        }
        stats.insert("algorithms".to_string(), serde_json::to_value(algo_counts).unwrap());
        stats
    }
    /// Cleanup expired keys
    pub async fn cleanup_expired_keys(&self) -> Result<usize> {
        let mut keys = self.keys.write().await;
        let now: _ = std::time::SystemTime::now();
        let mut removed_count = 0;
        keys.retain(|_, key| {
            if let Some(expires_at) = key.expires_at {
                if expires_at < now && key.state == KeyState::Expired {
                    removed_count += 1;
                    false // Remove this key
                } else {
                    true
                }
            } else {
                true // Keep keys without expiration
            }
        });
        info!("Cleaned up {} expired keys", removed_count);
        Ok(removed_count)
    }
}
#[cfg(test)]
mod tests {
    #[tokio::test]
    async fn test_key_generation() {
        let config: _ = EncryptionConfig {
            default_algorithm: EncryptionAlgorithm::AES256GCM,
            key_rotation_interval_days: 90,
            enable_hsm: false,
            backup_keys: true,
        };
        let kms: _ = KeyManagementService::new(config);
        let key: _ = kms.generate_key(
            KeyType::Symmetric,
            EncryptionAlgorithm::AES256GCM,
        ).await.unwrap();
        assert_eq!(key.key_type, KeyType::Symmetric);
        assert_eq!(key.algorithm, EncryptionAlgorithm::AES256GCM);
        assert_eq!(key.state, KeyState::Active);
    }
    #[tokio::test]
    async fn test_encryption_decryption() {
        let config: _ = EncryptionConfig {
            default_algorithm: EncryptionAlgorithm::AES256GCM,
            key_rotation_interval_days: 90,
            enable_hsm: false,
            backup_keys: true,
        };
        let kms: _ = KeyManagementService::new(config);
        let key: _ = kms.generate_key(
            KeyType::Symmetric,
            EncryptionAlgorithm::AES256GCM,
        ).await.unwrap();
        let plaintext: _ = b"Hello, Amber!";
        let encrypted: _ = kms.encrypt(&key.id, plaintext).await.unwrap();
        assert!(encrypted.success);
        let decrypted: _ = kms.decrypt(
            &key.id,
            encrypted.encrypted_data.as_ref().unwrap(),
            encrypted.iv.as_ref().unwrap(),
            encrypted.tag.as_ref().unwrap(),
        ).await.unwrap();
        assert!(decrypted.success);
        assert_eq!(decrypted.decrypted_data.as_ref().unwrap(), plaintext);
    }
    #[tokio::test]
    async fn test_key_rotation() {
        let config: _ = EncryptionConfig {
            default_algorithm: EncryptionAlgorithm::AES256GCM,
            key_rotation_interval_days: 90,
            enable_hsm: false,
            backup_keys: true,
        };
        let kms: _ = KeyManagementService::new(config);
        let original_key: _ = kms.generate_key(
            KeyType::Symmetric,
            EncryptionAlgorithm::AES256GCM,
        ).await.unwrap();
        let new_key: _ = kms.rotate_key(&original_key.id).await.unwrap();
        assert_ne!(original_key.id, new_key.id);
        assert_eq!(new_key.key_type, original_key.key_type);
        assert_eq!(new_key.algorithm, original_key.algorithm);
    }
    #[tokio::test]
    async fn test_key_revoke() {
        let config: _ = EncryptionConfig {
            default_algorithm: EncryptionAlgorithm::AES256GCM,
            key_rotation_interval_days: 90,
            enable_hsm: false,
            backup_keys: true,
        };
        let kms: _ = KeyManagementService::new(config);
        let key: _ = kms.generate_key(
            KeyType::Symmetric,
            EncryptionAlgorithm::AES256GCM,
        ).await.unwrap();
        kms.revoke_key(&key.id, "Security incident").await.unwrap();
        let retrieved_key: _ = kms.get_key(&key.id).await.unwrap();
        assert_eq!(retrieved_key.state, KeyState::Revoked);
    }
}