anya_core/security/crypto/
kdf.rs

1//! Key Derivation Function Module
2//!
3//! This module provides key derivation functions for Bitcoin security.
4
5use std::error::Error;
6
7/// Supported key derivation algorithms
8#[derive(Debug, Clone, Copy, PartialEq)]
9pub enum KdfAlgorithm {
10    /// PBKDF2 with HMAC-SHA256
11    Pbkdf2,
12    /// Argon2id - memory-hard KDF
13    Argon2id,
14    /// scrypt - memory-hard KDF
15    Scrypt,
16    /// HKDF - HMAC-based Key Derivation Function
17    Hkdf,
18}
19
20/// PBKDF2 parameters
21#[derive(Debug, Clone)]
22pub struct Pbkdf2Params {
23    /// Number of iterations
24    pub iterations: u32,
25    /// Salt value
26    pub salt: Vec<u8>,
27    /// Output key length in bytes
28    pub key_length: usize,
29}
30
31impl Default for Pbkdf2Params {
32    fn default() -> Self {
33        Self {
34            iterations: 10_000,
35            salt: vec![0u8; 16], // Should be random in practice
36            key_length: 32,
37        }
38    }
39}
40
41/// Argon2 parameters
42#[derive(Debug, Clone)]
43pub struct Argon2Params {
44    /// Memory size in KB
45    pub memory_cost: u32,
46    /// Number of iterations
47    pub iterations: u32,
48    /// Parallelism factor
49    pub parallelism: u32,
50    /// Salt value
51    pub salt: Vec<u8>,
52    /// Output key length in bytes
53    pub key_length: usize,
54}
55
56impl Default for Argon2Params {
57    fn default() -> Self {
58        Self {
59            memory_cost: 65536, // 64 MB
60            iterations: 3,
61            parallelism: 4,
62            salt: vec![0u8; 16], // Should be random in practice
63            key_length: 32,
64        }
65    }
66}
67
68/// Scrypt parameters
69#[derive(Debug, Clone)]
70pub struct ScryptParams {
71    /// CPU/memory cost parameter
72    pub n: u32,
73    /// Block size parameter
74    pub r: u32,
75    /// Parallelization parameter
76    pub p: u32,
77    /// Salt value
78    pub salt: Vec<u8>,
79    /// Output key length in bytes
80    pub key_length: usize,
81}
82
83impl Default for ScryptParams {
84    fn default() -> Self {
85        Self {
86            n: 16384, // 2^14
87            r: 8,
88            p: 1,
89            salt: vec![0u8; 16], // Should be random in practice
90            key_length: 32,
91        }
92    }
93}
94
95/// Derive a key from a password or passphrase using PBKDF2
96pub fn pbkdf2(_password: &[u8], params: &Pbkdf2Params) -> Vec<u8> {
97    // Placeholder implementation
98    // In a real implementation, we would use a crypto library with PBKDF2 support
99    vec![0u8; params.key_length]
100}
101
102/// Derive a key from a password or passphrase using Argon2id
103pub fn argon2id(_password: &[u8], params: &Argon2Params) -> Vec<u8> {
104    // Placeholder implementation
105    // In a real implementation, we would use a crypto library with Argon2 support
106    vec![0u8; params.key_length]
107}
108
109/// Derive a key from a password or passphrase using scrypt
110pub fn scrypt(_password: &[u8], params: &ScryptParams) -> Vec<u8> {
111    // Placeholder implementation
112    // In a real implementation, we would use a crypto library with scrypt support
113    vec![0u8; params.key_length]
114}
115
116/// Derive a key using HKDF (HMAC-based Key Derivation Function)
117pub fn hkdf(_ikm: &[u8], _salt: &[u8], _info: &[u8], key_length: usize) -> Vec<u8> {
118    // Placeholder implementation
119    // In a real implementation, we would use a crypto library with HKDF support
120    vec![0u8; key_length]
121}
122
123/// Derive a key using the specified KDF algorithm
124pub fn derive_key(
125    password: &[u8],
126    algorithm: KdfAlgorithm,
127    _params: &[u8],
128) -> Result<Vec<u8>, Box<dyn Error>> {
129    match algorithm {
130        KdfAlgorithm::Pbkdf2 => {
131            // Parse params as Pbkdf2Params
132            let default_params = Pbkdf2Params::default();
133            Ok(pbkdf2(password, &default_params))
134        }
135        KdfAlgorithm::Argon2id => {
136            // Parse params as Argon2Params
137            let default_params = Argon2Params::default();
138            Ok(argon2id(password, &default_params))
139        }
140        KdfAlgorithm::Scrypt => {
141            // Parse params as ScryptParams
142            let default_params = ScryptParams::default();
143            Ok(scrypt(password, &default_params))
144        }
145        KdfAlgorithm::Hkdf => {
146            // Parse params as salt and info
147            Ok(hkdf(password, &[], &[], 32))
148        }
149    }
150}
anya_core/security/crypto/kdf.rs

anya_core/security/crypto/
kdf.rs
