anya-core 1.2.0

Enterprise-grade Bitcoin Infrastructure Platform
Documentation 
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//! Hash Function Module
//!
//! This module provides cryptographic hash function implementations for Bitcoin security.

/// Supported hash algorithms
#[derive(Debug, Clone, Copy, PartialEq)]
pub enum HashAlgorithm {
    /// SHA-256
    Sha256,
    /// SHA-512
    Sha512,
    /// RIPEMD-160
    Ripemd160,
    /// Double SHA-256 (Bitcoin specific)
    DoubleSha256,
    /// SHA-256 followed by RIPEMD-160 (Bitcoin specific)
    Hash160,
}

/// Compute a hash using the specified algorithm
pub fn hash(data: &[u8], algorithm: HashAlgorithm) -> Vec<u8> {
    match algorithm {
        HashAlgorithm::Sha256 => sha256(data),
        HashAlgorithm::Sha512 => sha512(data),
        HashAlgorithm::Ripemd160 => ripemd160(data),
        HashAlgorithm::DoubleSha256 => double_sha256(data),
        HashAlgorithm::Hash160 => hash160(data),
    }
}

/// Compute SHA-256 hash
pub fn sha256(_data: &[u8]) -> Vec<u8> {
    // Placeholder implementation
    // In a real implementation, we would use a crypto library like ring, etc.
    vec![0u8; 32]
}

/// Compute SHA-512 hash
pub fn sha512(_data: &[u8]) -> Vec<u8> {
    // Placeholder implementation
    // In a real implementation, we would use a crypto library like ring, etc.
    vec![0u8; 64]
}

/// Compute RIPEMD-160 hash
pub fn ripemd160(_data: &[u8]) -> Vec<u8> {
    // Placeholder implementation
    // In a real implementation, we would use a crypto library like ripemd, etc.
    vec![0u8; 20]
}

/// Compute double SHA-256 hash (Bitcoin specific)
pub fn double_sha256(data: &[u8]) -> Vec<u8> {
    sha256(&sha256(data))
}

/// Compute SHA-256 followed by RIPEMD-160 (Bitcoin specific)
pub fn hash160(data: &[u8]) -> Vec<u8> {
    ripemd160(&sha256(data))
}

/// Compute HMAC using the specified hash algorithm
pub fn hmac(_key: &[u8], _data: &[u8], algorithm: HashAlgorithm) -> Vec<u8> {
    // Placeholder implementation
    // In a real implementation, we would use a crypto library with HMAC support
    match algorithm {
        HashAlgorithm::Sha256 => vec![0u8; 32],
        HashAlgorithm::Sha512 => vec![0u8; 64],
        HashAlgorithm::Ripemd160 => vec![0u8; 20],
        HashAlgorithm::DoubleSha256 => vec![0u8; 32],
        HashAlgorithm::Hash160 => vec![0u8; 20],
    }
}