Set the mode of operation, client for OTP validation and challenge-response for challenge-response validation, client is the default.
*authfile*=_file_::
Set the location of the file that holds the mappings of Yubikey token IDs to user names. The format is username:first_public_id:second_public_id:... default location of the file is $HOME/.yubico/authorized_yubikeys.
*id*=_id_::
Set to your client identity.
*key*=_key_::
Set to your client key in base64 format. The client key is also known as API key, and provides integrity in the communication between the client (you) and the validation server. If you want to get one for use with the default YubiCloud service, please go to https://upgrade.yubico.com/getapikey/
*alwaysok*::
Set to enable all authentication attempts to succeed (aka presentation mode).
*try_first_pass*::
Before prompting the user for their password, the module first tries the previous stacked module´s password in case that satisfies this module as well.
*use_first_pass*::
The argument use_first_pass forces the module to use a previous stacked modules password and will never prompt the user - if no password is available or the password is not appropriate, the user will be denied access.
*urllist*=_list_::
List of URL templates to be used. This is set by calling ykclient_set_url_bases.
This option should not be used, please use the urllist option instead. Set the URL template to use, this is set by calling ykclient_set_url_template. The URL should be set in the format
Specify a proxy to connect to the validation server. Valid schemes are socks4://, socks4a://, socks5:// or socks5h://. Socks5h asks the proxy to do the dns resolving. If no scheme or port is specified HTTP proxy port 1080 will be used. E.g. socks5h://user:pass@10.10.0.1:1080
This argument is used to show the OTP (One Time Password) when it is entered, i.e. to enable terminal echo of entered characters. You are advised to not use this, if you are using two factor authentication because that will display your password on the screen. This requires the service using the PAM module to display custom fields. For example, OpenSSH requires you to configure "ChallengeResponseAuthentication no".
*ldap_uri*=_uri_::
Specify the LDAP server URI (e.g. ldap://localhost).
The dn where the users are stored (eg: ou=users,dc=domain,dc=com). If 'ldap_filter' is used this is the base from which the subtree search will be performed.
If *authfile* is not set this file is used for the mapping between YubiKey public id and in _client_ mode.
*$HOME/.yubico/challenge*::
*$HOME/.yubico/challenge-_serial_number_*::
If *chalresp_path* is not set these files are used to hold next challenge and expected response for the user in _challenge-response_ mode. If *chalresp_path* is set the filename will be username instead of challenge.
