Overview

Packages

  • awl
    • caldav-client-v2
    • RRule
  • davical
    • authentication
      • drivers
    • caldav
    • DAViCalSession
    • DAVTicket
    • external-bind
    • feed
    • HTTPAuthSession
    • iSchedule
    • iSchedule-POST
    • logging
    • metrics
    • Principal
    • propfind
    • PublicSession
    • Request
    • Resource
    • tzservice
  • None

Classes

  • AtomEntry
  • AtomFeed
  • AtomXHTMLContent
  • CalDAVClient
  • CalDAVRequest
  • CalendarInfo
  • CheckResult
  • DAViCalSession
  • DAVPrincipal
  • DAVResource
  • DAVTicket
  • FakeSession
  • HTTPAuthSession
  • imapPamDriver
  • iSchedule
  • ldapDriver
  • Principal
  • PublicSession
  • pwauthPamDriver
  • RepeatRule
  • RepeatRuleDateRange
  • RepeatRuleDateTime
  • RepeatRuleTimeZone
  • Rfc5545Duration
  • rimapPamDriver
  • setupFakeSession
  • squidPamDriver
  • Tools
  • VCard
  • VTimezone
  • WritableCollection

Functions

  • access_ticket_browser
  • add_failure
  • add_proxy_response
  • array_values_mapping
  • auth_functions_deprecated
  • AuthExternalAWL
  • binding_row_editor
  • bindings_to_other_browser
  • bindings_to_us_browser
  • bits_to_privilege
  • build_dependencies_table
  • build_privileges_html
  • build_site_statistics
  • BuildSqlFilter
  • caldav_get_feed
  • calquery_apply_filter
  • cardquery_apply_filter
  • catch_setup_errors
  • check_awl_version
  • check_calendar
  • check_curl
  • check_database_connection
  • check_datetime
  • check_davical_version
  • check_for_expansion
  • check_gettext
  • check_iconv
  • check_ldap
  • check_magic_quotes_gpc
  • check_magic_quotes_runtime
  • check_pdo
  • check_pdo_pgsql
  • check_pgsql
  • check_real_php
  • check_schema_version
  • check_string
  • check_suhosin_server_strip
  • check_xml
  • checkiSchedule
  • clean_get
  • collection_privilege_format_function
  • component_to_xml
  • confirm_delete_bind_in
  • confirm_delete_binding
  • confirm_delete_collection
  • confirm_delete_principal
  • confirm_delete_ticket
  • ConstructURL
  • controlRequestContainer
  • create_external
  • CreateDefaultRelationships
  • CreateHomeCalendar
  • CreateHomeCollections
  • DateToISODate
  • DeconstructURL
  • delete_collection
  • deliverItipCancel
  • display_status
  • do_error
  • do_scheduling_for_delete
  • do_scheduling_reply
  • do_scheduling_requests
  • doImipMessage
  • doItipAttendeeReply
  • doItipOrganizerCancel
  • early_catch_fatal_error
  • early_exception_handler
  • edit_binding_row
  • edit_grant_row_collection
  • edit_grant_row_principal
  • edit_group_row
  • edit_ticket_row
  • errorResponse
  • expand_event_instances
  • expand_properties
  • expand_timezone_onsets
  • export_iCalendar
  • fetch_external
  • filter_post
  • fix_unique_member
  • generateCsrf
  • generateKeys
  • generateMcrypt
  • generateOpenssl
  • generateRandom
  • get_address_properties
  • get_collection_contents
  • get_freebusy
  • get_href_containers
  • get_phpinfo
  • getComponentRange
  • getCsrf
  • getCsrfField
  • GetItip
  • getPrincipalByID
  • getStaticLdap
  • getStatusMessage
  • GetTZID
  • getUserByEMail
  • getUserByID
  • getUserByName
  • getVCalendarRange
  • grant_row_editor
  • group_members_browser
  • group_memberships_browser
  • group_row_editor
  • handle_cancel_request
  • handle_freebusy_request
  • handle_schedule_reply
  • handle_schedule_request
  • handle_subaction
  • hyperlink
  • i18n
  • IMAP_PAM_check
  • import_addressbook_collection
  • import_calendar_collection
  • import_collection
  • ischedule_cancel
  • ischedule_freebusy_request
  • ischedule_get
  • ischedule_request
  • ISODateToHTTPDate
  • late_catch_fatal_error
  • LDAP_check
  • local_session_sql
  • log_caldav_action
  • log_setup_error
  • logRequestHeaders
  • make_help_link
  • obfuscated_event
  • olson_from_vtimezone
  • principal_collection_browser
  • principal_editor
  • principal_grants_browser
  • principal_privilege_format_function
  • print_metric
  • privilege_to_bits
  • privileges_to_XML
  • process_ace
  • processItipCancel
  • property_response
  • public_events_only
  • PWAUTH_PAM_check
  • rdate_expand
  • RIMAP_check
  • rollback
  • rollback_on_error
  • rrule_expand
  • send_dav_header
  • send_page_header
  • sessionExists
  • simple_write_resource
  • SqlFilterCardDAV
  • SqlFilterFragment
  • SQUID_PAM_check
  • SRVFormat
  • SRVOk
  • sync_LDAP
  • sync_LDAP_groups
  • sync_user_from_LDAP
  • ticket_row_editor
  • unicodeToUtf8
  • update_external
  • UpdateCollectionTimezones
  • updateCsrf
  • UpdateUserFromExternal
  • utf8ToUnicode
  • verifyCsrf
  • verifyCsrfPost
  • write_alarms
  • write_attendees
  • write_resource
  • Overview
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<?php

/**
 * Update the CSRF token
 */
function updateCsrf() {
    if(!sessionExists()) {
        session_start();
    }

    $_SESSION['csrf_token'] = generateCsrf();
}

/**
 * Check whether a session is currently active
 * @return bool
 */
function sessionExists() {
    if (version_compare(phpversion(), '5.4.0', '>')) {
        return session_id() !== '';
    } else {
        return session_status() === PHP_SESSION_ACTIVE;
    }
}

/**
 * Generate a CSRF token, it chooses from 3 different functions based on PHP version and modules
 * @return bool|string
 */
function generateCsrf() {
    if (version_compare(phpversion(), '7.0.0', '>=')) {
        $random = generateRandom();
        if($random !== false) return $random;
    }

    if (function_exists('mcrypt_create_iv')) {
        return generateMcrypt();
    }

    return generateOpenssl();
}

/**
 * Generate a random string using the PHP built in function random_bytes
 * @version 7.0.0
 * @return bool|string
 */
function generateRandom() {
    try {
        return bin2hex(random_bytes(32));
    } catch (Exception $e) {
        return false;
    }
}

/**
 * Generate a random string using MCRYPT
 * @return string
 */
function generateMcrypt() {
    return bin2hex(mcrypt_create_iv(32, MCRYPT_DEV_URANDOM));
}

/**
 * Generate a random string using OpenSSL
 * @return string
 */
function generateOpenssl() {
    return bin2hex(openssl_random_pseudo_bytes(32));
}

/**
 * Checks for session and the existence of a key
 * after ensuring both are present it returns the
 * current CSRF token
 * @return string
 */
function getCsrf() {
    if(!sessionExists()) {
        session_start();
    }

    if(!array_key_exists('csrf_token', $_SESSION)) {
        updateCsrf();
    }

    return $_SESSION['csrf_token'];
}

/**
 * Get a hidden CSRF input field to be used in forms
 * @return string
 */
function getCsrfField() {
    return sprintf("<input type=\"hidden\" name=\"csrf_token\" value=\"%s\">", getCsrf());
}

/**
 * Verify a given CSRF token
 * @param $csrf_token
 * @return bool
 */
function verifyCsrf($csrf_token) {
    $current_csrf = getCsrf();
    // Prefer hash_equals over === because the latter is vulnerable to timing attacks
    if(function_exists('hash_equals')) {
        return hash_equals($current_csrf, $csrf_token);
    }

    return $current_csrf === $csrf_token;
}

/**
 * Uses the global $_POST variable to check if the CSRF token is valid
 * @return bool
 */
function verifyCsrfPost() {
    return (isset($_POST['csrf_token']) && verifyCsrf($_POST['csrf_token']));
}
DAViCal API documentation generated by ApiGen