wpa supplicant 0.7.3 assistance

Simner, John john.simner at unify.com
Mon Jul 14 03:45:13 EDT 2014


Dear Jouni,
I hope you can help me.
The product I am working on uses WPA supplicant 0.7.3 in a client mode and there is a requirement to only provide the following ciphers in the Client Hello to the Radius Server...

  1.  TLS_RSA_WITH_AES_128_CBC_SHA
  2.  TLS_RSA_WITH_AES_256_CBC_SHA
  3.  TLS_RSA_WITH_3DES_EDE_CBC_SHA
  4.  SSL_RSA_WITH_3DES_EDE_CBC_SHA
  5.  TLS_DHE_RSA_WITH_AES_128_CBC_SHA
  6.  TLS_DHE_RSA_WITH_AES_256_CBC_SHA
  7.  TLS_DHE_RSA_WITH_3DES_EDE_CBC_SHA
  8.  SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA
The wpa supplicant is started with the following configuration file...

ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=admin
fast_reauth=0
ap_scan=0
eapol_version=2

network={
                key_mgmt=IEEE8021X
                eap=TLS
                identity="OpenStage"
                ca_cert="/tmp/xsupplicant/RADIUSServerCerts.pem"
                client_cert="/tmp/certificates/RADIUSSuppCert.pem"
                private_key="/tmp/certificates/RADIUSSuppKey.pem"
                private_key_passwd=""
}

I have tried to find out how I can specify the required list of cipher suites and found a function tls_connection_set_cipher_list() which sets up the required cipher list for OpenSSL.
I have found tlsv1_client_set_cipher_list() which sets up a set of cipher suites with "TODO: implement proper configuration of cipher suites".

I know that I should be calling...  SSL_CTX_set_cipher_list(ssl, CIPHER_LIST)
With CIPHER_LIST "!ADH:!eNULL:!EXP:!LOW:AES128-SHA:AES256-SHA:DES-CBC3-SHA:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:EDH-RSA-DES-CBC3-SHA".

Please could you tell me whether I should be looking to patch the wpa supplicant code or is there any way that I can place the required list in a config file and read them from there.

Apologies if I have not followed the correct protocol.
I found your details in http://src.gnu-darwin.org/src/contrib/wpa_supplicant/developer.txt.html

Thank you for your assistance and I look forward to your response.

Thanks..
John


[Unify: Harmonize your enterprise]

John Simner BSc(Hons) MSc CEng. MIET
Software Engineer, Devices Development

Unify Enterprise Communications Ltd.

Tel.: +44 (1908) 817378 (One Number Service)
Email: john.simner at unify.com <mailto:vorname.name at unify.com>

www.unify.co.uk<http://www.unify.co.uk/>


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