anya_core/security/crypto/
signature.rs

1//! Digital Signature Module
2//!
3//! This module provides cryptographic signature functionality for Bitcoin security.
4
5use std::error::Error;
6
7/// Supported signature algorithms
8#[derive(Debug, Clone, Copy, PartialEq)]
9pub enum SignatureAlgorithm {
10    /// ECDSA with secp256k1 curve (Bitcoin standard)
11    EcdsaSecp256k1,
12    /// Schnorr signature with secp256k1 curve (Bitcoin Taproot)
13    SchnorrSecp256k1,
14    /// EdDSA with Curve25519 (Ed25519)
15    Ed25519,
16}
17
18/// A digital signature
19#[derive(Debug, Clone)]
20pub struct Signature {
21    /// Raw signature bytes
22    pub bytes: Vec<u8>,
23    /// The algorithm used to create this signature
24    pub algorithm: SignatureAlgorithm,
25}
26
27/// Sign a message with the provided private key
28pub fn sign(
29    _message: &[u8],
30    _private_key: &[u8],
31    algorithm: SignatureAlgorithm,
32) -> Result<Signature, Box<dyn Error>> {
33    // Placeholder implementation
34    // In a real implementation, we would use a crypto library like secp256k1, etc.
35    let sig_len = match algorithm {
36        SignatureAlgorithm::EcdsaSecp256k1 => 64,
37        SignatureAlgorithm::SchnorrSecp256k1 => 64,
38        SignatureAlgorithm::Ed25519 => 64,
39    };
40
41    Ok(Signature {
42        bytes: vec![0u8; sig_len],
43        algorithm,
44    })
45}
46
47/// Verify a signature against a message and public key
48pub fn verify(
49    _message: &[u8],
50    _signature: &Signature,
51    _public_key: &[u8],
52) -> Result<bool, Box<dyn Error>> {
53    // Placeholder implementation
54    // In a real implementation, we would use a crypto library like secp256k1, etc.
55    Ok(true)
56}
57
58/// Sign a message with ECDSA using the secp256k1 curve (Bitcoin standard)
59pub fn ecdsa_sign_secp256k1(
60    message: &[u8],
61    private_key: &[u8],
62) -> Result<Signature, Box<dyn Error>> {
63    sign(message, private_key, SignatureAlgorithm::EcdsaSecp256k1)
64}
65
66/// Verify an ECDSA signature using the secp256k1 curve (Bitcoin standard)
67pub fn ecdsa_verify_secp256k1(
68    message: &[u8],
69    signature: &[u8],
70    public_key: &[u8],
71) -> Result<bool, Box<dyn Error>> {
72    let sig = Signature {
73        bytes: signature.to_vec(),
74        algorithm: SignatureAlgorithm::EcdsaSecp256k1,
75    };
76    verify(message, &sig, public_key)
77}
78
79/// Sign a message with Schnorr using the secp256k1 curve (Bitcoin Taproot)
80pub fn schnorr_sign_secp256k1(
81    message: &[u8],
82    private_key: &[u8],
83) -> Result<Signature, Box<dyn Error>> {
84    sign(message, private_key, SignatureAlgorithm::SchnorrSecp256k1)
85}
86
87/// Verify a Schnorr signature using the secp256k1 curve (Bitcoin Taproot)
88pub fn schnorr_verify_secp256k1(
89    message: &[u8],
90    signature: &[u8],
91    public_key: &[u8],
92) -> Result<bool, Box<dyn Error>> {
93    let sig = Signature {
94        bytes: signature.to_vec(),
95        algorithm: SignatureAlgorithm::SchnorrSecp256k1,
96    };
97    verify(message, &sig, public_key)
98}
anya_core/security/crypto/signature.rs

anya_core/security/crypto/
signature.rs
