security-rust 1.0.3

A pure Rust attack detection library with 27 detectors across 4 categories — injection, protocol, data, and file attacks. Zero framework dependencies.
Documentation 
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// Copyright (c) 2026 erik <erik@erik.xyz> — https://erik.xyz

use regex::Regex;
use std::sync::LazyLock;

use crate::{AttackCategory, DetectionResult, Detector, Severity};

static PATTERNS: LazyLock<Vec<Regex>> = LazyLock::new(|| {
    vec![
        Regex::new(r"(?i)//[^/\s]+\.[a-z]{2,}").unwrap(),
        Regex::new(r"(?i)javascript\s*:").unwrap(),
        Regex::new(r"(?i)data\s*:\s*text/html").unwrap(),
        Regex::new(r"(?i)data\s*:\s*text/plain").unwrap(),
    ]
});

pub struct OpenRedirectDetector;

impl Detector for OpenRedirectDetector {
    fn name(&self) -> &'static str {
        "open_redirect"
    }

    fn detect(&self, input: &str) -> Option<DetectionResult> {
        for re in PATTERNS.iter() {
            if let Some(m) = re.find(input) {
                let start = m.start();
                // Skip // matches that are part of a URL scheme (e.g. https://)
                if start > 0 && input.as_bytes()[start - 1] == b':' {
                    continue;
                }
                return Some(DetectionResult {
                    attack_type: "open_redirect".into(),
                    category: AttackCategory::Protocol,
                    severity: Severity::Medium,
                    matched_pattern: m.as_str().to_string(),
                    offset: start,
                    message: "Open redirect detected".into(),
                });
            }
        }
        None
    }
}