security-rust 2.0.0

A pure Rust attack detection library with 32 detectors across 4 categories — injection, protocol, data, and file — plus stateful session, throttling, and risk scoring. Zero framework dependencies.
Documentation 
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// Copyright (c) 2026 erik <erik@erik.xyz> — https://erik.xyz

use crate::{AttackCategory, DetectionResult, Detector, Severity, regex_detect};
use regex::Regex;
use std::sync::LazyLock;

static PATTERNS: LazyLock<Vec<Regex>> = LazyLock::new(|| {
    vec![
        Regex::new(r"\(\s*&").unwrap(),
        Regex::new(r"\(\s*\|").unwrap(),
        Regex::new(r"\(!\s*\(").unwrap(),
        Regex::new(r"\*\(cn=").unwrap(),
        Regex::new(r"\(\s*objectClass\s*=").unwrap(),
        Regex::new(r"\(\s*uid\s*=").unwrap(),
        Regex::new(r"\)\s*\((?:&|\||!)").unwrap(),
        Regex::new(r"\(\s*cn\s*=").unwrap(),
    ]
});

pub struct LdapInjectionDetector;

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

    fn detect(&self, input: &str) -> Option<DetectionResult> {
        regex_detect(
            &PATTERNS,
            self.name(),
            AttackCategory::Injection,
            Severity::High,
            "LDAP injection detected",
            input,
        )
    }
}

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

    fn det() -> LdapInjectionDetector {
        LdapInjectionDetector
    }

    fn assert_hit(input: &str) {
        crate::test_helpers::assert_detected(
            &det(),
            input,
            AttackCategory::Injection,
            Severity::High,
        );
    }

    #[test]
    fn name_is_ldap_injection() {
        assert_eq!(det().name(), "ldap_injection");
    }

    #[test]
    fn detects_common_payloads() {
        for input in [
            "(&(uid=admin)(!(|(cn=*))))",
            "(&(cn=user))",
            "(|(cn=admin))",
            "*(cn=*)",
            "(!(uid=*))",
            "(objectClass=*)",
            ")(&(uid=admin))",
        ] {
            assert_hit(input);
        }
    }

    #[test]
    fn benign_inputs_not_detected() {
        for input in [
            "Hello, this is a normal text input. Nothing suspicious here.",
            "Please enter your username and password",
            "The directory contains user records",
            "uid=admin",
            "cn=test",
        ] {
            assert!(det().detect(input).is_none(), "false positive: {input}");
        }
    }

    #[test]
    fn edge_cases() {
        assert!(det().detect("").is_none());
        assert!(det().detect(" \t\n ").is_none());
        assert!(det().detect("你好世界 こんにちは").is_none());
        // near misses: attribute present but not in filter form
        assert!(det().detect("(uidadmin)").is_none());
        assert!(det().detect("(xuid=1)").is_none());
        assert!(det().detect("user (uid) admin").is_none());
    }

    #[test]
    fn obfuscated_variants_detected() {
        for input in ["(&(UID=admin))", "( uid =*)", "( cn = * )"] {
            assert_hit(input);
        }
    }
}