# documentation:2.0:variables
Keywords: documentation,2.0,variables

# Variables

## Presentation

Variables can be used in rules and headers. All rules are concerned:

- Access rule in virtual host
- SAML IDP preselection
- Session opening
- …

Variables are stored in the user session. We can distinguish several kind of variables:

- internal variables, managed by LemonLDAP::NG
- exported variables collected from UserDB backend
- macro and groups

When you know the key of the variable, you just have to prefix it with the dollar sign to use it, for example to test if `uid` variable match `coudot` :

    $uid eq "coudot"

You can inspect a user session with the sessions explorer (in Manager)

Below are documented internal variables.

## Modules

Register what module was used for authentication, user data, password, …

Key | Description
--- | ---
_auth | Authentication module
_userDB | User module
_passwordDB | Password module
_issuerDB | Issuer module (can be multivalued)
_authChoice | User choice done if authentication choice was used
_authMulti | Full name of authentication module (with `#label`) used in Multi
_userDBMulti | Full name of user module (with `#label`) used in Multi

## Connection

Datas concerning the first connection to the portal

Key | Description
--- | ---
ipAddr | IP of the user (can be the X Forwarded For IP if trusted proxies are configured)
_timezone | Timezone of the user, set with javascript from standard login form (will be empty if other authentication methods are used)
_url | URL used before being redirected to the portal (empty if portal was used as entry point)

## Authentication

Datas around the authentication process.

Key | Description
--- | ---
_session_id | Session identifier (carried in cookie)
_user | User found from login process
_password | Password found from login process (only if password store in session is configured)
authenticationLevel | Authentication level

## Dates

Key | Description
--- | ---
_utime | Timestamp of session creation
startTime | Date of session creation
updateTime | Date of session last modification
_lastAuthnUTime | Timestamp of last authentication time

## SAML

Datas related to SAML protocol

Key | Description
--- | ---
_idp | Name of IDP used for authentication
_idpConfKey | Configuration key of IDP used for authentication
_samlToken | SAML token
_lassoSessionDump | Lasso session dump
_lassoIdentityDump | Lasso identity dump

## Notifications

Key | Description
--- | ---
_notification_id | Date of validation of the notification id

## Login history

Key | Description
--- | ---
loginHistory | HASH of login success and failures

## LDAP

Only with UserDB LDAP.

Key | Description
--- | ---
dn | Distinguished name

## OpenID

Key | Description
--- | ---
_openid_id | Consent to share attribute id trough OpenID

## OpenID Connect

Key | Description
--- | ---
OpenIDConnect_IDToken | ID Token
OpenIDConnect_OP | Configuration key of OP used for authentication
OpenIDConnect_access_token | OAuth2 Access Token used to get UserInfo data
_oidc_consent_scope_rp | Scope for which consent was given for RP rp
_oidc_consent_time_rp | Time when consent was given for RP rp

## Other

Key | Description
--- | ---
appsListOrder | Order of categories in the menu
_session_kind | Type of session (SSO, Persistent, …)