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peap: derive and install eap key material

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Tim Kourt 2018-02-02 11:00:13 -08:00 committed by Denis Kenzior
parent c5ec12e0e4
commit 8c1b175b8b
1 changed files with 26 additions and 0 deletions
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26
src/eap-peap.c
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@ -28,6 +28,7 @@
#include <stdio.h>
#include <errno.h>
#include <ell/ell.h>
#include <ell/tls-private.h>
#include "eap.h"
@ -195,6 +196,31 @@ static void eap_peap_tunnel_data_received(const uint8_t *data, size_t data_len,
static void eap_peap_tunnel_ready(const char *peer_identity, void *user_data)
{
struct eap_state *eap = user_data;
struct eap_peap_state *peap = eap_get_data(eap);
uint8_t msk_emsk[128];
uint8_t random[64];
/*
* PEAP V5, Section 2.1.1
*
* Cleartext Failure packets MUST be silently discarded once TLS tunnel
* has been brought up.
*/
eap_method_success(eap);
/* MSK, EMSK and challenge derivation */
memcpy(random + 0, peap->tunnel->pending.client_random, 32);
memcpy(random + 32, peap->tunnel->pending.server_random, 32);
tls_prf_get_bytes(peap->tunnel, L_CHECKSUM_SHA256, 32,
peap->tunnel->pending.master_secret,
sizeof(peap->tunnel->pending.master_secret),
"client EAP encryption", random, 64,
msk_emsk, 128);
eap_set_key_material(eap, msk_emsk + 0, 64, NULL, 0, NULL, 0);
}
static void eap_peap_tunnel_disconnected(enum l_tls_alert_desc reason,