WPA_SUPPLICANT.CONF(5)					      BSD File Formats Manual					    WPA_SUPPLICANT.CONF(5)

NAME

     wpa_supplicant.conf -- configuration file for wpa_supplicant(8)

DESCRIPTION

     The wpa_supplicant(8) utility is an implementation of the WPA Supplicant component, i.e., the part that runs in the client stations.  It
     implements WPA key negotiation with a WPA Authenticator and EAP authentication with Authentication Server using configuration information
     stored in a text file.

     The configuration file consists of optional global parameter settings and one or more network blocks, e.g. one for each used SSID.  The
     wpa_supplicant(8) utility will automatically select the best network based on the order of the network blocks in the configuration file, net-
     work security level (WPA/WPA2 is preferred), and signal strength.	Comments are indicated with the '#' character; all text to the end of the
     line will be ignored.

GLOBAL PARAMETERS

     Default parameters used by wpa_supplicant(8) may be overridden by specifying

	   parameter=value

     in the configuration file (note no spaces are allowed).  Values with embedded spaces must be enclosed in quote marks.

     The following parameters are recognized:

     ctrl_interface
	     The pathname of the directory in which wpa_supplicant(8) creates UNIX domain socket files for communication with frontend programs
	     such as wpa_cli(8).

     ctrl_interface_group
	     A group name or group ID to use in setting protection on the control interface file.  This can be set to allow non-root users to
	     access the control interface files.  If no group is specified, the group ID of the control interface is not modified and will, typi-
	     cally, be the group ID of the directory in which the socket is created.

     eapol_version
	     The IEEE 802.1x/EAPOL protocol version to use; either 1 (default) or 2.  The wpa_supplicant(8) utility is implemented according to
	     IEEE 802-1X-REV-d8 which defines EAPOL version to be 2.  However, some access points do not work when presented with this version so
	     by default wpa_supplicant(8) will announce that it is using EAPOL version 1.  If version 2 must be announced for correct operation
	     with an access point, this value may be set to 2.

     ap_scan
	     Access point scanning and selection control; one of 0, 1 (default), or 2.	Only setting 1 should be used with the wlan(4) module; the
	     other settings are for use on other operating systems.

     fast_reauth
	     EAP fast re-authentication; either 1 (default) or 0.  Control fast re-authentication support in EAP methods that support it.

NETWORK BLOCKS

     Each potential network/access point should have a ``network block'' that describes how to identify it and how to set up security.	When mul-
     tiple network blocks are listed in a configuration file, the highest priority one is selected for use or, if multiple networks with the same
     priority are identified, the first one listed in the configuration file is used.

     A network block description is of the form:

	   network={
		   parameter=value
		   ...
	   }

     (note the leading "network={" may have no spaces).  The block specification contains one or more parameters from the following list:

     ssid (required)
	     Network name (as announced by the access point).  An ASCII or hex string enclosed in quotation marks.

     scan_ssid
	     SSID scan technique; 0 (default) or 1.  Technique 0 scans for the SSID using a broadcast Probe Request frame while 1 uses a directed
	     Probe Request frame.  Access points that cloak themselves by not broadcasting their SSID require technique 1, but beware that this
	     scheme can cause scanning to take longer to complete.

     bssid   Network BSSID (typically the MAC address of the access point).

     priority
	     The priority of a network when selecting among multiple networks; a higher value means a network is more desirable.  By default net-
	     works have priority 0.  When multiple networks with the same priority are considered for selection, other information such as secu-
	     rity policy and signal strength are used to select one.

     mode    IEEE 802.11 operation mode; either 0 (infrastructure, default) or 1 (IBSS).  Note that IBSS (adhoc) mode can only be used with
	     key_mgmt set to NONE (plaintext and static WEP), or key_mgmt set to WPA-NONE (fixed group key TKIP/CCMP).	In addition, ap_scan has
	     to be set to 2 for IBSS.  WPA-NONE requires proto set to WPA, key_mgmt set to WPA-NONE, pairwise set to NONE, group set to either
	     CCMP or TKIP (but not both), and psk must also be set.

     proto   List of acceptable protocols; one or more of: WPA (IEEE 802.11i/D3.0) and RSN (IEEE 802.11i).  WPA2 is another name for RSN.  If not
	     set this defaults to "WPA RSN".

     key_mgmt
	     List of acceptable key management protocols; one or more of: WPA-PSK (WPA pre-shared key), WPA-EAP (WPA using EAP authentication),
	     IEEE8021X (IEEE 802.1x using EAP authentication and, optionally, dynamically generated WEP keys), NONE (plaintext or static WEP
	     keys).  If not set this defaults to "WPA-PSK WPA-EAP".

     auth_alg
	     List of allowed IEEE 802.11 authentication algorithms; one or more of: OPEN (Open System authentication, required for WPA/WPA2),
	     SHARED (Shared Key authentication), LEAP (LEAP/Network EAP).  If not set automatic selection is used (Open System with LEAP enabled
	     if LEAP is allowed as one of the EAP methods).

     pairwise
	     List of acceptable pairwise (unicast) ciphers for WPA; one or more of: CCMP (AES in Counter mode with CBC-MAC, RFC 3610, IEEE
	     802.11i/D7.0), TKIP (Temporal Key Integrity Protocol, IEEE 802.11i/D7.0), NONE (deprecated).  If not set this defaults to "CCMP
	     TKIP".

     group   List of acceptable group (multicast) ciphers for WPA; one or more of: CCMP (AES in Counter mode with CBC-MAC, RFC 3610, IEEE
	     802.11i/D7.0), TKIP (Temporal Key Integrity Protocol, IEEE 802.11i/D7.0), WEP104 (WEP with 104-bit key), WEP40 (WEP with 40-bit key).
	     If not set this defaults to "CCMP TKIP WEP104 WEP40".

     psk     WPA preshared key used in WPA-PSK mode.  The key is specified as 64 hex digits or as an 8-63 character ASCII passphrase.  ASCII
	     passphrases are dynamically converted to a 256-bit key at runtime using the network SSID, or they can be statically converted at con-
	     figuration time using the wpa_passphrase(8) utility.

     eapol_flags
	     Dynamic WEP key usage for non-WPA mode, specified as a bit field.	Bit 0 (1) forces dynamically generated unicast WEP keys to be
	     used.  Bit 1 (2) forces dynamically generated broadcast WEP keys to be used.  By default this is set to 3 (use both).

     eap     List of acceptable EAP methods; one or more of: MD5 (EAP-MD5, cannot be used with WPA, used only as a Phase 2 method with EAP-PEAP or
	     EAP-TTLS), MSCHAPV2 (EAP-MSCHAPV2, cannot be used with WPA; used only as a Phase 2 method with EAP-PEAP or EAP-TTLS), OTP (EAP-OTP,
	     cannot be used with WPA; used only as a Phase 2 metod with EAP-PEAP or EAP-TTLS), GTC (EAP-GTC, cannot be used with WPA; used only as
	     a Phase 2 metod with EAP-PEAP or EAP-TTLS), TLS (EAP-TLS, client and server certificate), PEAP (EAP-PEAP, with tunneled EAP authenti-
	     cation), TTLS (EAP-TTLS, with tunneled EAP or PAP/CHAP/MSCHAP/MSCHAPV2 authentication).  If not set this defaults to all available
	     methods compiled in to wpa_supplicant(8).	Note that by default wpa_supplicant(8) is compiled with EAP support; see make.conf(5) for
	     the NO_WPA_SUPPLICANT_EAPOL configuration variable that can be used to disable EAP support.

     identity
	     Identity string for EAP.

     anonymous_identity
	     Anonymous identity string for EAP (to be used as the unencrypted identity with EAP types that support different tunneled identities;
	     e.g. EAP-TTLS).

     mixed_cell
	     Configure whether networks that allow both plaintext and encryption are allowed when selecting a BSS from the scan results.  By
	     default this is set to 0 (disabled).

     password
	     Password string for EAP.

     ca_cert
	     Pathname to CA certificate file.  This file can have one or more trusted CA certificates.	If ca_cert is not included, server cer-
	     tificates will not be verified (not recommended).

     client_cert
	     Pathname to client certificate file (PEM/DER).

     private_key
	     Pathname to a client private key file (PEM/DER/PFX).  When a PKCS#12/PFX file is used, then client_cert should not be specified as
	     both the private key and certificate will be read from PKCS#12 file.

     private_key_passwd
	     Password for any private key file.

     dh_file
	     Pathname to a file holding DH/DSA parameters (in PEM format).  This file holds parameters for an ephemeral DH key exchange.  In most
	     cases, the default RSA authentication does not use this configuration.  However, it is possible to set up RSA to use an ephemeral DH
	     key exchange.  In addition, ciphers with DSA keys always use ephemeral DH keys.  This can be used to achieve forward secrecy.  If the
	     dh_file is in DSA parameters format, it will be automatically converted into DH parameters.

     subject_match
	     Substring to be matched against the subject of the authentication server certificate.  If this string is set, the server certificate
	     is only accepted if it contains this string in the subject.  The subject string is in following format:

		   /C=US/ST=CA/L=San Francisco/CN=Test AS/emailAddress=as@example.com

     phase1  Phase1 (outer authentication, i.e., TLS tunnel) parameters (string with field-value pairs, e.g., "peapver=0" or "peapver=1
	     peaplabel=1").

	     peapver can be used to force which PEAP version (0 or 1) is used.

	     peaplabel=1 can be used to force new label, ``client PEAP encryption'', to be used during key derivation when PEAPv1 or newer.  Most
	     existing PEAPv1 implementations seem to be using the old label, ``client EAP encryption'', and wpa_supplicant(8) is now using that as
	     the default value.  Some servers, e.g., Radiator, may require peaplabel=1 configuration to interoperate with PEAPv1; see
	     eap_testing.txt for more details.

	     peap_outer_success=0 can be used to terminate PEAP authentication on tunneled EAP-Success.  This is required with some RADIUS servers
	     that implement draft-josefsson-pppext-eap-tls-eap-05.txt (e.g., Lucent NavisRadius v4.4.0 with PEAP in ``IETF Draft 5'' mode).

	     include_tls_length=1 can be used to force wpa_supplicant(8) to include TLS Message Length field in all TLS messages even if they are
	     not fragmented.

	     sim_min_num_chal=3 can be used to configure EAP-SIM to require three challenges (by default, it accepts 2 or 3).

	     fast_provisioning=1 option enables in-line provisioning of EAP-FAST credentials (PAC).

     phase2  phase2: Phase2 (inner authentication with TLS tunnel) parameters (string with field-value pairs, e.g., "auth=MSCHAPV2" for EAP-PEAP
	     or "autheap=MSCHAPV2 autheap=MD5" for EAP-TTLS).

     ca_cert2
	     Like ca_cert but for EAP inner Phase 2.

     client_cert2
	     Like client_cert but for EAP inner Phase 2.

     private_key2
	     Like private_key but for EAP inner Phase 2.

     private_key2_passwd
	     Like private_key_passwd but for EAP inner Phase 2.

     dh_file2
	     Like dh_file but for EAP inner Phase 2.

     subject_match2
	     Like subject_match but for EAP inner Phase 2.

     eappsk  16-byte pre-shared key in hex format for use with EAP-PSK.

     nai     User NAI for use with EAP-PSK.

     server_nai
	     Authentication Server NAI for use with EAP-PSK.

     pac_file
	     Pathname to the file to use for PAC entries with EAP-FAST.  The wpa_supplicant(8) utility must be able to create this file and write
	     updates to it when PAC is being provisioned or refreshed.

     eap_workaround
	     Enable/disable EAP workarounds for various interoperability issues with misbehaving authentication servers.  By default these work-
	     arounds are enabled.  Strict EAP conformance can be configured by setting this to 0.

     wep_tx_keyidx
	     which key to use for transmission of packets.

     wep_keyN key
	     An ASCII string enclosed in quotation marks to encode the WEP key.  Without quotes this is a hex string of the actual key.  WEP is
	     considered insecure and should be avoided.  The exact translation from an ASCII key to a hex key varies.  Use hex keys where possi-
	     ble.

CERTIFICATES

     Some EAP authentication methods require use of certificates.  EAP-TLS uses both server- and client-side certificates, whereas EAP-PEAP and
     EAP-TTLS only require a server-side certificate.  When a client certificate is used, a matching private key file must also be included in
     configuration.  If the private key uses a passphrase, this has to be configured in the wpa_supplicant.conf file as private_key_passwd.

     The wpa_supplicant(8) utility supports X.509 certificates in PEM and DER formats.	User certificate and private key can be included in the
     same file.

     If the user certificate and private key is received in PKCS#12/PFX format, they need to be converted to a suitable PEM/DER format for use by
     wpa_supplicant(8).  This can be done using the openssl(1) program, e.g. with the following commands:

     # convert client certificate and private key to PEM format
     openssl pkcs12 -in example.pfx -out user.pem -clcerts
     # convert CA certificate (if included in PFX file) to PEM format
     openssl pkcs12 -in example.pfx -out ca.pem -cacerts -nokeys

FILES

     /etc/wpa_supplicant.conf
     /usr/share/examples/etc/wpa_supplicant.conf

EXAMPLES

     WPA-Personal (PSK) as a home network and WPA-Enterprise with EAP-TLS as a work network:

     # allow frontend (e.g., wpa_cli) to be used by all users in 'wheel' group
     ctrl_interface=/var/run/wpa_supplicant
     ctrl_interface_group=wheel
     #
     # home network; allow all valid ciphers
     network={
	     ssid="home"
	     scan_ssid=1
	     key_mgmt=WPA-PSK
	     psk="very secret passphrase"
     }
     #
     # work network; use EAP-TLS with WPA; allow only CCMP and TKIP ciphers
     network={
	     ssid="work"
	     scan_ssid=1
	     key_mgmt=WPA-EAP
	     pairwise=CCMP TKIP
	     group=CCMP TKIP
	     eap=TLS
	     identity="user@example.com"
	     ca_cert="/etc/cert/ca.pem"
	     client_cert="/etc/cert/user.pem"
	     private_key="/etc/cert/user.prv"
	     private_key_passwd="password"
     }

     WPA-RADIUS/EAP-PEAP/MSCHAPv2 with RADIUS servers that use old peaplabel (e.g., Funk Odyssey and SBR, Meetinghouse Aegis, Interlink RAD-
     Series):

     ctrl_interface=/var/run/wpa_supplicant
     ctrl_interface_group=wheel
     network={
	     ssid="example"
	     scan_ssid=1
	     key_mgmt=WPA-EAP
	     eap=PEAP
	     identity="user@example.com"
	     password="foobar"
	     ca_cert="/etc/cert/ca.pem"
	     phase1="peaplabel=0"
	     phase2="auth=MSCHAPV2"
     }

     EAP-TTLS/EAP-MD5-Challenge configuration with anonymous identity for the unencrypted use.	Real identity is sent only within an encrypted TLS
     tunnel.

     ctrl_interface=/var/run/wpa_supplicant
     ctrl_interface_group=wheel
     network={
	     ssid="example"
	     scan_ssid=1
	     key_mgmt=WPA-EAP
	     eap=TTLS
	     identity="user@example.com"
	     anonymous_identity="anonymous@example.com"
	     password="foobar"
	     ca_cert="/etc/cert/ca.pem"
	     phase2="auth=MD5"
     }

     Traditional WEP configuration with 104 bit key specified in hexadecimal.  Note the WEP key is not quoted.

     ctrl_interface=/var/run/wpa_supplicant
     ctrl_interface_group=wheel
     network={
	     ssid="example"
	     scan_ssid=1
	     key_mgmt=NONE
	     wep_tx_keyidx=0
	     # hex keys denoted without quotes
	     wep_key0=42FEEDDEAFBABEDEAFBEEFAA55
	     # ASCII keys denoted with quotes.
	     wep_key1="FreeBSDr0cks!"
     }

SEE ALSO

     wpa_cli(8), wpa_passphrase(8), wpa_supplicant(8)

HISTORY

     The wpa_supplicant.conf manual page and wpa_supplicant(8) functionality first appeared in FreeBSD 6.0.

AUTHORS

     This manual page is derived from the README and wpa_supplicant.conf files in the wpa_supplicant distribution provided by Jouni Malinen
     <j@w1.fi>.

BSD
								  April 10, 2010							       BSD