rusthound_ce/objects/

certtemplate.rs

use serde_json::value::Value;
use serde::{Deserialize, Serialize};
use ldap3::SearchEntry;
use log::{debug, trace};
use std::collections::HashMap;
use std::error::Error;

use crate::objects::common::{LdapObject, AceTemplate, SPNTarget, Link, Member};
use crate::enums::{decode_guid_le, get_pki_cert_name_flags, get_pki_enrollment_flags, parse_ntsecuritydescriptor};
use crate::json::checker::common::get_name_from_full_distinguishedname;
use crate::utils::date::{filetime_to_span, span_to_string, string_to_epoch};

/// CertTemplate structure
#[derive(Debug, Clone, Deserialize, Serialize, Default)]
pub struct CertTemplate {
    #[serde(rename = "Properties")]
    properties: CertTemplateProperties,
    #[serde(rename = "Aces")]
    aces: Vec<AceTemplate>,
    #[serde(rename = "ObjectIdentifier")]
    object_identifier: String,
    #[serde(rename = "IsDeleted")]
    is_deleted: bool,
    #[serde(rename = "IsACLProtected")]
    is_acl_protected: bool,
    #[serde(rename = "ContainedBy")]
    contained_by: Option<Member>,
}

impl CertTemplate {
    // New CertTemplate
    pub fn new() -> Self { 
        Self { ..Default::default() } 
    }

    // Immutable access.
    pub fn properties(&self) -> &CertTemplateProperties {
        &self.properties
    }
    pub fn object_identifier(&self) -> &String {
        &self.object_identifier
    }

    /// Function to parse and replace value in json template for Certificate Template object.
    pub fn parse(
        &mut self,
        result: SearchEntry,
        domain: &str,
        dn_sid: &mut HashMap<String, String>,
        sid_type: &mut HashMap<String, String>,
        domain_sid: &str,
        schema_guid_map: &HashMap<String, String>,
    ) -> Result<(), Box<dyn Error>> {
        let result_dn: String = result.dn.to_uppercase();
        let result_attrs: HashMap<String, Vec<String>> = result.attrs;
        let result_bin: HashMap<String, Vec<Vec<u8>>> = result.bin_attrs;

        // Debug for current object
        debug!("Parse CertTemplate: {result_dn}");

        // Trace all result attributes
        for (key, value) in &result_attrs {
            trace!("  {key:?}:{value:?}");
        }
        // Trace all bin result attributes
        for (key, value) in &result_bin {
            trace!("  {key:?}:{value:?}");
        }

        // Change all values...
        self.properties.domain = domain.to_uppercase();
        self.properties.distinguishedname = result_dn;    
        self.properties.domainsid = domain_sid.to_string();
        let _ca_name = get_name_from_full_distinguishedname(&self.properties.distinguishedname);

        // With a check
        for (key, value) in &result_attrs {
            match key.as_str() {
                "name" => {
                    let name = format!("{}@{}",&value[0],domain);
                    self.properties.name = name.to_uppercase();
                }
                "description" => {
                    self.properties.description = Some(value[0].to_owned());
                }
                "displayName" => {
                    self.properties.displayname = value[0].to_owned();
                }
                "msPKI-Certificate-Name-Flag" => {
                    if !value.is_empty() {
                        self.properties.certificatenameflag = get_pki_cert_name_flags(value[0].parse::<i64>().unwrap_or(0) as u64);
                        self.properties.enrolleesuppliessubject = self.properties.certificatenameflag.contains("ENROLLEE_SUPPLIES_SUBJECT");
                        self.properties.subjectaltrequireupn = self.properties.certificatenameflag.contains("SUBJECT_ALT_REQUIRE_UPN");
                        self.properties.subjectaltrequiredns = self.properties.certificatenameflag.contains("SUBJECT_ALT_REQUIRE_DNS");
                        self.properties.subjectaltrequiredomaindns = self.properties.certificatenameflag.contains("SUBJECT_ALT_REQUIRE_DOMAIN_DNS");
                        self.properties.subjectaltrequireemail = self.properties.certificatenameflag.contains("SUBJECT_ALT_REQUIRE_EMAIL");
                        self.properties.subjectaltrequirespn = self.properties.certificatenameflag.contains("SUBJECT_ALT_REQUIRE_SPN");
                        self.properties.subjectrequireemail = self.properties.certificatenameflag.contains("SUBJECT_REQUIRE_EMAIL");
                    }
                }
                "msPKI-Enrollment-Flag" => {
                    if !value.is_empty() {
                        self.properties.enrollmentflag = get_pki_enrollment_flags(value[0].parse::<i64>().unwrap_or(0) as u64);
                        self.properties.requiresmanagerapproval = self.properties.enrollmentflag.contains("PEND_ALL_REQUESTS");
                        self.properties.nosecurityextension = self.properties.enrollmentflag.contains("NO_SECURITY_EXTENSION");
                    }
                }
                "msPKI-Private-Key-Flag" => {
                    // if !value.is_empty() {
                    //     self.properties.() = get_pki_private_flags(value[0].parse::<i64>().unwrap_or(0) as u64);
                    // }
                }
                "msPKI-RA-Signature" => {
                    if !value.is_empty() {
                        self.properties.authorizedsignatures = value.first().unwrap_or(&"0".to_string()).parse::<i64>().unwrap_or(0);
                    }
                }
                "msPKI-RA-Application-Policies" => {
                    if !value.is_empty() {
                        self.properties.applicationpolicies = value.to_owned();
                    }
                }
                "msPKI-Certificate-Application-Policy" => {
                    if !value.is_empty() {
                        self.properties.certificateapplicationpolicy = value.to_owned();
                    }
                }
                "msPKI-RA-Policies" => {
                    if !value.is_empty() {
                        self.properties.issuancepolicies = value.to_owned();
                    }
                }
                "msPKI-Cert-Template-OID" => {
                    if !value.is_empty() {
                        self.properties.oid = value[0].to_owned();
                    }
                }
                "pKIExtendedKeyUsage" => {
                    if !value.is_empty() {
                        self.properties.ekus = value.to_owned();
                    }
                }
                "msPKI-Template-Schema-Version" => {
                    self.properties.schemaversion = value[0].parse::<i64>().unwrap_or(0);
                }
                "whenCreated" => {
                    let epoch = string_to_epoch(&value[0])?;
                    if epoch.is_positive() {
                        self.properties.whencreated = epoch;
                    }
                }
                "isDeleted" => {
                    self.is_deleted = true;
                }
                _ => {}
            }
        }

        // For all, bins attributs
        for (key, value) in &result_bin {
            match key.as_str() {
                "objectGUID" => {
                    // objectGUID raw to string
                    let guid = decode_guid_le(&value[0]);
                    self.object_identifier = guid.to_owned();
                }
                "nTSecurityDescriptor" => {
                    // nTSecurityDescriptor raw to string
                    let relations_ace =  parse_ntsecuritydescriptor(
                        self,
                        &value[0],
                        "CertTemplate",
                        &result_attrs,
                        &result_bin,
                        domain,
                        schema_guid_map,
                    );
                    self.aces = relations_ace;
                }
                "pKIExpirationPeriod" => {
                    self.properties.validityperiod = span_to_string(filetime_to_span(value[0].to_owned())?);
                }
                "pKIOverlapPeriod" => {
                    self.properties.renewalperiod = span_to_string(filetime_to_span(value[0].to_owned())?);
                }
                _ => {}
            }
        }

        // Get all effective ekus.
        self.properties.effectiveekus = Self::get_effectiveekus(
            &self.properties.schemaversion,
            &self.properties.ekus,
            &self.properties.certificateapplicationpolicy,
        );

        // Check if authentication is enabled or not for this template.
        self.properties.authenticationenabled = Self::authentication_is_enabled(self);

        // Push DN and SID in HashMap
        if self.object_identifier != "SID" {
            dn_sid.insert(
                self.properties.distinguishedname.to_string(),
                self.object_identifier.to_string()
            );
            // Push DN and Type
            sid_type.insert(
                self.object_identifier.to_string(),
                "CertTemplate".to_string()
            );
        }

        // Trace and return CertTemplate struct
        // trace!("JSON OUTPUT: {:?}",serde_json::to_string(&self).unwrap());
        Ok(())
    }

    /// Function to get effective ekus for one template.
    fn get_effectiveekus(
        schema_version: &i64,
        ekus: &[String],
        certificateapplicationpolicy: &[String],
    ) -> Vec<String> {
        if schema_version == &1 && !ekus.is_empty() {
            ekus.to_vec()
        } else {
            certificateapplicationpolicy.to_vec()
        }
    }

    /// Function to check if authentication is enabled or not.
    fn authentication_is_enabled(&mut self) -> bool {
        let authentication_oids = [
            "1.3.6.1.5.5.7.3.2", // ClientAuthentication,
            "1.3.6.1.5.2.3.4", // PKINITClientAuthentication
            "1.3.6.1.4.1.311.20.2.2", // SmartcardLogon
            "2.5.29.37.0", // AnyPurpose
        ];
        self.properties.effectiveekus.iter()
            .any(|eku| authentication_oids.contains(&eku.as_str()))
            || self.properties.effectiveekus.is_empty()
    }
}

impl LdapObject for CertTemplate {
    // To JSON
    fn to_json(&self) -> Value {
        serde_json::to_value(self).unwrap()
    }

    // Get values
    fn get_object_identifier(&self) -> &String {
        &self.object_identifier
    }
    fn get_is_acl_protected(&self) -> &bool {
        &self.is_acl_protected
    }
    fn get_aces(&self) -> &Vec<AceTemplate> {
        &self.aces
    }
    fn get_spntargets(&self) -> &Vec<SPNTarget> {
        panic!("Not used by current object.");
    }
    fn get_allowed_to_delegate(&self) -> &Vec<Member> {
        panic!("Not used by current object.");
    }
    fn get_links(&self) -> &Vec<Link> {
        panic!("Not used by current object.");
    }
    fn get_contained_by(&self) -> &Option<Member> {
        &self.contained_by
    }
    fn get_child_objects(&self) -> &Vec<Member> {
        panic!("Not used by current object.");
    }
    fn get_haslaps(&self) -> &bool {
        &false
    }
    
    // Get mutable values
    fn get_aces_mut(&mut self) -> &mut Vec<AceTemplate> {
        &mut self.aces
    }
    fn get_spntargets_mut(&mut self) -> &mut Vec<SPNTarget> {
        panic!("Not used by current object.");
    }
    fn get_allowed_to_delegate_mut(&mut self) -> &mut Vec<Member> {
        panic!("Not used by current object.");
    }
    
    // Edit values
    fn set_is_acl_protected(&mut self, is_acl_protected: bool) {
        self.is_acl_protected = is_acl_protected;
        self.properties.isaclprotected = is_acl_protected;
    }
    fn set_aces(&mut self, aces: Vec<AceTemplate>) {
        self.aces = aces;
    }
    fn set_spntargets(&mut self, _spn_targets: Vec<SPNTarget>) {
        // Not used by current object.
    }
    fn set_allowed_to_delegate(&mut self, _allowed_to_delegate: Vec<Member>) {
        // Not used by current object.
    }
    fn set_links(&mut self, _links: Vec<Link>) {
        // Not used by current object.
    }
    fn set_contained_by(&mut self, contained_by: Option<Member>) {
        self.contained_by = contained_by;
    }
    fn set_child_objects(&mut self, _child_objects: Vec<Member>) {
        // Not used by current object.
    }
}


// CertTemplate properties structure
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct CertTemplateProperties {
   domain: String,
   name: String,
   distinguishedname: String,
   domainsid: String,
   isaclprotected: bool,
   description: Option<String>,
   whencreated: i64,
   validityperiod: String,
   renewalperiod: String,
   schemaversion: i64,
   displayname: String,
   oid: String,
   enrollmentflag: String,
   requiresmanagerapproval: bool,
   nosecurityextension: bool,
   certificatenameflag: String,
   enrolleesuppliessubject: bool,
   subjectaltrequireupn: bool,
   subjectaltrequiredns: bool,
   subjectaltrequiredomaindns: bool,
   subjectaltrequireemail: bool,
   subjectaltrequirespn: bool,
   subjectrequireemail: bool,
   ekus: Vec<String>,
   certificateapplicationpolicy: Vec<String>,
   authorizedsignatures: i64,
   applicationpolicies: Vec<String>,
   issuancepolicies: Vec<String>,
   effectiveekus: Vec<String>,
   authenticationenabled: bool,
}

impl Default for CertTemplateProperties {
    fn default() -> CertTemplateProperties {
        CertTemplateProperties {
            domain: String::from(""),
            name: String::from(""),
            distinguishedname: String::from(""),
            domainsid: String::from(""),
            isaclprotected: false,
            description: None,
            whencreated: -1,
            validityperiod: String::from(""),
            renewalperiod: String::from(""),
            schemaversion: 1,
            displayname: String::from(""),
            oid: String::from(""),
            enrollmentflag: String::from(""),
            requiresmanagerapproval: false,
            nosecurityextension: false,
            certificatenameflag: String::from(""),
            enrolleesuppliessubject: false,
            subjectaltrequireupn: false,
            subjectaltrequiredns: false,
            subjectaltrequiredomaindns: false,
            subjectaltrequireemail: false,
            subjectaltrequirespn: false,
            subjectrequireemail: false,
            ekus: Vec::new(),
            certificateapplicationpolicy: Vec::new(),
            authorizedsignatures: 0,
            applicationpolicies: Vec::new(),
            issuancepolicies: Vec::new(),
            effectiveekus: Vec::new(),
            authenticationenabled: false,
       }
    }
 }

impl CertTemplateProperties {
    // Immutable access.
    pub fn name(&self) -> &String {
        &self.name
    }
}

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

    const SUBJECT_NAME_FLAG_PROPERTIES: [&str; 6] = [
        "subjectaltrequiredomaindns",
        "subjectaltrequirespn",
        "subjectaltrequireupn",
        "subjectaltrequireemail",
        "subjectaltrequiredns",
        "subjectrequireemail",
    ];

    fn parse_certtemplate_with_name_flag(flag: Option<i64>) -> CertTemplate {
        let mut attrs = HashMap::new();
        attrs.insert("name".to_string(), vec!["RustHoundLab".to_string()]);
        if let Some(flag) = flag {
            attrs.insert(
                "msPKI-Certificate-Name-Flag".to_string(),
                vec![flag.to_string()],
            );
        }

        let result = SearchEntry {
            dn: "CN=RustHoundLab,CN=Certificate Templates,CN=Public Key Services,CN=Services,CN=Configuration,DC=example,DC=local".to_string(),
            attrs,
            bin_attrs: HashMap::new(),
        };
        let mut certtemplate = CertTemplate::new();
        let mut dn_sid = HashMap::new();
        let mut sid_type = HashMap::new();

        certtemplate
            .parse(
                result,
                "example.local",
                &mut dn_sid,
                &mut sid_type,
                "S-1-5-21-1-2-3",
                &HashMap::new(),
            )
            .unwrap();

        certtemplate
    }

    #[test]
    fn parse_maps_each_subject_name_flag_to_its_boolean_property() {
        let cases = [
            (0x0040_0000, "subjectaltrequiredomaindns"),
            (0x0080_0000, "subjectaltrequirespn"),
            (0x0200_0000, "subjectaltrequireupn"),
            (0x0400_0000, "subjectaltrequireemail"),
            (0x0800_0000, "subjectaltrequiredns"),
            (0x2000_0000, "subjectrequireemail"),
        ];

        for (flag, expected_property) in cases {
            let certtemplate = parse_certtemplate_with_name_flag(Some(flag));
            let properties = &certtemplate.to_json()["Properties"];

            for property in SUBJECT_NAME_FLAG_PROPERTIES {
                assert_eq!(
                    properties[property],
                    property == expected_property,
                    "unexpected value for {property} with flag {flag:#010x}",
                );
            }
        }
    }

    #[test]
    fn subject_name_flag_properties_default_to_false_when_attribute_is_absent() {
        let certtemplate = parse_certtemplate_with_name_flag(None);
        let properties = &certtemplate.to_json()["Properties"];

        for property in SUBJECT_NAME_FLAG_PROPERTIES {
            assert_eq!(properties[property], false, "{property} should default to false");
        }
    }
}