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eap-wsc: Handle M8 messages

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This commit is contained in:
Denis Kenzior 2016-09-08 21:59:04 -05:00
parent 1dc197d176
commit b93a992ed1
1 changed files with 79 additions and 0 deletions
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79
src/eap-wsc.c
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@ -58,6 +58,7 @@ enum state {
STATE_EXPECT_M4,
STATE_EXPECT_M6,
STATE_EXPECT_M8,
STATE_FINISHED,
};
static struct l_key *dh5_generator;
@ -338,6 +339,80 @@ static void eap_wsc_send_nack(struct eap_state *eap,
return;
}
static void eap_wsc_send_done(struct eap_state *eap)
{
struct eap_wsc_state *wsc = eap_get_data(eap);
struct wsc_done done;
uint8_t *pdu;
size_t pdu_len;
uint8_t buf[256];
done.version2 = true;
memcpy(done.enrollee_nonce, wsc->m1->enrollee_nonce,
sizeof(done.enrollee_nonce));
memcpy(done.registrar_nonce, wsc->m2->registrar_nonce,
sizeof(done.registrar_nonce));
pdu = wsc_build_wsc_done(&done, &pdu_len);
if (!pdu)
return;
buf[12] = WSC_OP_DONE;
buf[13] = 0;
memcpy(buf + 14, pdu, pdu_len);
eap_send_response(eap, EAP_TYPE_EXPANDED, buf, pdu_len + 14);
l_free(pdu);
}
static void eap_wsc_handle_m8(struct eap_state *eap,
const uint8_t *pdu, size_t len)
{
struct eap_wsc_state *wsc = eap_get_data(eap);
struct wsc_m8 m8;
struct iovec encrypted;
uint8_t *decrypted;
size_t decrypted_len;
struct wsc_m8_encrypted_settings m8es;
struct iovec creds[3];
size_t n_creds;
/* Spec unclear what to do here, see comments in eap_wsc_send_nack */
if (wsc_parse_m8(pdu, len, &m8, &encrypted) != 0) {
eap_wsc_send_nack(eap, WSC_CONFIGURATION_ERROR_NO_ERROR);
return;
}
if (!authenticator_check(wsc, pdu, len))
return;
decrypted = encrypted_settings_decrypt(wsc, encrypted.iov_base,
encrypted.iov_len,
&decrypted_len);
if (!decrypted)
goto send_nack;
n_creds = L_ARRAY_SIZE(creds);
if (wsc_parse_m8_encrypted_settings(decrypted, decrypted_len,
&m8es, creds, &n_creds))
goto invalid_settings;
if (!keywrap_authenticator_check(wsc, decrypted, decrypted_len))
goto invalid_settings;
l_free(decrypted);
eap_wsc_send_done(eap);
wsc->state = STATE_FINISHED;
return;
invalid_settings:
l_free(decrypted);
send_nack:
eap_wsc_send_nack(eap, WSC_CONFIGURATION_ERROR_DECRYPTION_CRC_FAILURE);
}
static void eap_wsc_send_m7(struct eap_state *eap,
const uint8_t *m6_pdu, size_t m6_len)
{
@ -743,7 +818,11 @@ static void eap_wsc_handle_request(struct eap_state *eap,
eap_wsc_handle_m6(eap, pkt + 2, len - 2);
break;
case STATE_EXPECT_M8:
eap_wsc_handle_m8(eap, pkt + 2, len - 2);
break;
case STATE_FINISHED:
eap_wsc_send_nack(eap, WSC_CONFIGURATION_ERROR_NO_ERROR);
return;
}
}