forge-guard 0.1.0

//! Exploit engine — generates attack vectors and exploit paths.

use crate::core::{Finding, ForgeGuardError, Severity};
/// Analyze findings to generate exploit paths and attack vectors.
pub fn analyze_exploit_paths(
    findings: &[Finding],
    _source_files: &[PathBuf],
) -> Result<Vec<Finding>, ForgeGuardError> {
    let mut exploit_findings = Vec::new();

    for finding in findings {
        if finding.severity >= Severity::High {
            let exploit_path = generate_exploit_path(finding);
            if let Some(path) = exploit_path {
                let mut enhanced = finding.clone();
                enhanced.exploit_path = Some(path);
                exploit_findings.push(enhanced);
            }
        }
    }

    Ok(exploit_findings)
}

/// Generate an exploit path demonstration for a given finding.
fn generate_exploit_path(finding: &Finding) -> Option<Vec<String>> {
    match finding.category.as_str() {
        "Access Control" => Some(vec![
            format!(
                "Attacker identifies unprotected function: {}",
                finding.title
            ),
            "Attacker calls vulnerable function directly without authorization".into(),
            "Function executes with attacker-controlled parameters".into(),
            match finding.severity {
                Severity::Critical | Severity::High => {
                    "Attacker gains unauthorized control or extracts funds".into()
                }
                _ => "Attacker modifies contract state illegally".into(),
            },
        ]),
        "Logic" => Some(vec![
            format!("Attacker identifies logical flaw: {}", finding.title),
            "Attacker crafts transactions exploiting the flawed logic".into(),
            "Contract executes unintended code path".into(),
            "Attacker drains assets or breaks contract invariants".into(),
        ]),
        "DeFi" => Some(vec![
            "Attacker obtains flash loan from lending protocol".into(),
            "Attacker manipulates price oracle or liquidity pool".into(),
            "Attacker executes arbitrage transaction manipulating contract".into(),
            "Attacker repays flash loan, keeping profit".into(),
        ]),
        "Upgradeability" => Some(vec![
            "Attacker identifies unsafe upgrade path".into(),
            "Attacker deploys malicious implementation contract".into(),
            "Proxy proxies to malicious implementation".into(),
            "Attacker takes over contract through upgrade".into(),
        ]),
        "Cryptography" => Some(vec![
            "Attacker intercepts signed message".into(),
            "Attacker replays signature on different chain or context".into(),
            "Signature bypasses authorization checks".into(),
            "Attacker gains unauthorized access".into(),
        ]),
        "Cross-Chain" => Some(vec![
            "Attacker identifies cross-chain message vulnerability".into(),
            "Attacker crafts malicious cross-chain message".into(),
            "Validator/relayer processes malicious message".into(),
            "Funds are stolen from cross-chain bridge".into(),
        ]),
        _ => None,
    }
}

use std::path::PathBuf;

#[cfg(test)]
mod tests {
    use super::*;
    use crate::core::FindingBuilder;

    #[test]
    fn test_exploit_path_generation() {
        let finding = FindingBuilder::default()
            .title("Test Finding")
            .description("A test vulnerability")
            .severity(Severity::High)
            .category("Access Control".into())
            .build();

        let result = analyze_exploit_paths(&[finding], &[]).unwrap();
        assert!(!result.is_empty());
        assert!(result[0].exploit_path.is_some());
    }
}