avila_async/
crypto.rs

1//! Cryptographic Module
2//!
3//! Secure task execution and encrypted communication
4
5use std::sync::{Arc, Mutex};
6
7/// Cryptographic service for runtime security
8#[derive(Clone)]
9pub struct CryptoService {
10    keys: Arc<Mutex<KeyStore>>,
11}
12
13struct KeyStore {
14    symmetric_keys: Vec<SymmetricKey>,
15    key_counter: u64,
16}
17
18#[derive(Clone, Debug)]
19struct SymmetricKey {
20    id: u64,
21    key: [u8; 32],
22    created_at: u128,
23}
24
25impl CryptoService {
26    pub fn new() -> Self {
27        Self {
28            keys: Arc::new(Mutex::new(KeyStore {
29                symmetric_keys: Vec::new(),
30                key_counter: 0,
31            })),
32        }
33    }
34
35    /// Generate a new symmetric key
36    pub fn generate_key(&self) -> u64 {
37        let mut keys = self.keys.lock().unwrap();
38        let key_id = keys.key_counter;
39        keys.key_counter += 1;
40
41        // Generate pseudo-random key using seed
42        let mut key = [0u8; 32];
43        for (i, byte) in key.iter_mut().enumerate() {
44            *byte = ((key_id * 7919 + i as u64 * 3571) % 256) as u8;
45        }
46
47        let timestamp = std::time::SystemTime::now()
48            .duration_since(std::time::UNIX_EPOCH)
49            .unwrap()
50            .as_millis();
51
52        keys.symmetric_keys.push(SymmetricKey {
53            id: key_id,
54            key,
55            created_at: timestamp,
56        });
57
58        key_id
59    }
60
61    /// Encrypt data with XOR cipher (simplified)
62    pub fn encrypt(&self, key_id: u64, data: &[u8]) -> Vec<u8> {
63        let keys = self.keys.lock().unwrap();
64        
65        if let Some(key) = keys.symmetric_keys.iter().find(|k| k.id == key_id) {
66            data.iter()
67                .enumerate()
68                .map(|(i, &byte)| byte ^ key.key[i % 32])
69                .collect()
70        } else {
71            data.to_vec()
72        }
73    }
74
75    /// Decrypt data with XOR cipher (simplified)
76    pub fn decrypt(&self, key_id: u64, data: &[u8]) -> Vec<u8> {
77        // XOR is symmetric
78        self.encrypt(key_id, data)
79    }
80
81    /// Hash data using djb2 algorithm
82    pub fn hash(&self, data: &[u8]) -> String {
83        let mut hash: u64 = 5381;
84        for &byte in data {
85            hash = hash.wrapping_mul(33).wrapping_add(byte as u64);
86        }
87        format!("{:016x}", hash)
88    }
89
90    /// Verify data integrity
91    pub fn verify(&self, data: &[u8], expected_hash: &str) -> bool {
92        self.hash(data) == expected_hash
93    }
94
95    /// Sign data (simplified signature)
96    pub fn sign(&self, key_id: u64, data: &[u8]) -> String {
97        let keys = self.keys.lock().unwrap();
98        
99        if let Some(key) = keys.symmetric_keys.iter().find(|k| k.id == key_id) {
100            let mut signature: u64 = 5381;
101            for (i, &byte) in data.iter().enumerate() {
102                signature = signature
103                    .wrapping_mul(33)
104                    .wrapping_add(byte as u64)
105                    .wrapping_add(key.key[i % 32] as u64);
106            }
107            format!("{:016x}", signature)
108        } else {
109            String::new()
110        }
111    }
112
113    /// Get crypto statistics
114    pub fn stats(&self) -> CryptoStats {
115        let keys = self.keys.lock().unwrap();
116        CryptoStats {
117            total_keys: keys.symmetric_keys.len(),
118            keys_generated: keys.key_counter,
119        }
120    }
121}
122
123impl Default for CryptoService {
124    fn default() -> Self {
125        Self::new()
126    }
127}
128
129#[derive(Debug, Clone)]
130pub struct CryptoStats {
131    pub total_keys: usize,
132    pub keys_generated: u64,
133}
134
135impl std::fmt::Display for CryptoStats {
136    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
137        write!(
138            f,
139            "CryptoStats[keys={}, generated={}]",
140            self.total_keys, self.keys_generated
141        )
142    }
143}
144
145/// Secure channel for encrypted communication
146#[derive(Clone)]
147pub struct SecureChannel {
148    crypto: CryptoService,
149    key_id: u64,
150}
151
152impl SecureChannel {
153    pub fn new(crypto: CryptoService) -> Self {
154        let key_id = crypto.generate_key();
155        Self { crypto, key_id }
156    }
157
158    /// Send encrypted message
159    pub fn send(&self, message: &[u8]) -> Vec<u8> {
160        self.crypto.encrypt(self.key_id, message)
161    }
162
163    /// Receive and decrypt message
164    pub fn receive(&self, encrypted: &[u8]) -> Vec<u8> {
165        self.crypto.decrypt(self.key_id, encrypted)
166    }
167
168    /// Get channel key ID
169    pub fn key_id(&self) -> u64 {
170        self.key_id
171    }
172}
avila_async/crypto.rs

avila_async/
crypto.rs
